# SMIME Class The S/MIME class implements the S/MIME standard for encryption and decryption with public key cryptography and X.509 digital certificates. ## Syntax ```text SMIME ``` ## Remarks The S/MIME class implements the S/MIME V3 standard for encryption and decryption using Public Key Cryptography Standards (PKCS). In addition, the class can be used to both generate and verify RSA digital signatures. Using this class for decrypting or signing requires a valid digital certificate with a private key. Before performing an operation the input and output values should be specified. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. **Signing** To sign the current data included in the input message with a certificate, the [Certificate](#certificate-property-smime-class) property must be set to a valid [Certificate](#certificate-type) object for the signing certificate. The [IncludeCertificate](#includecertificate-property-smime-class) and [DetachedSignature](#detachedsignature-property-smime-class) properties allow you to specify additional details about the signing process. By setting [IncludeCertificate](#includecertificate-property-smime-class) to True, digital certificates can be encoded and included in message signature when signing the document. Including a certificate is the preferred method of building signed messages. In addition the S/MIME class can also generate PKCS #7 formatted detached digital signatures and envelopes by specifying [DetachedSignature](#detachedsignature-property-smime-class). **Encrypting** To encrypt a message with the class in a PKCS envelope, you must first specify the [Certificate](#certificate-type) for each recipient in the [RecipientCerts](#recipientcerts-property-smime-class) collection to encrypt the message with. You can easily add these with the [AddRecipientCert](#addrecipientcert-method-smime-class) method. Once you have done this you can call the [Encrypt](#encrypt-method-smime-class) method to encrypt the message with the recipient certificates. In addition, the class allows you to sign and encrypt simultaneously with the [SignAndEncrypt](#signandencrypt-method-smime-class) method. You must set all of the properties needed for both [Sign](#sign-method-smime-class) and [Encrypt](#encrypt-method-smime-class) The result of the encrypted or signed data will be replaced in the [OutputMessage](#outputmessage-property-smime-class) property and the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) property will be filled with the appropriate mime headers if applicable. **Decrypting** Decrypting PKCS envelopes is handled with the [Decrypt](#decrypt-method-smime-class) method. When this method is called, the class will attempt to find an appropriate certificate in the [Certificate](#certificate-property-smime-class) property that matches the encrypting certificate. If it cannot find an appropriate certificate, an exception will be thrown and the message will not be decrypted. **Verifying Signatures** In addition, the S/MIME class can be used to verify signatures included in signed messages or documents. After specifying the input, [VerifySignature](#verifysignature-method-smime-class) can then be used to verify the signature. If the message does not have a certificate attached, more then likely an exception will be thrown and the class will not be able to verify the signature. If [VerifySignature](#verifysignature-method-smime-class) is successful, the [SignerCert](#signercert-property-smime-class) and [SignerCertChain](#signercertchain-property-smime-class) properties will be filled with the certificate information of the message signer. This information can be used to verify the signing certificates. Similar to [SignAndEncrypt](#signandencrypt-method-smime-class), [DecryptAndVerifySignature](#decryptandverifysignature-method-smime-class) can be used to both decrypt and verify the message in Message. ## Property List *The following is the full list of the properties of the class with short descriptions. Click on the links for further details.* | | | | --- | --- | | [Certificate](#certificate-property-smime-class) | This property includes the current selected certificate. | | [DetachedSignature](#detachedsignature-property-smime-class) | This property specifies whether to include a detached signature when signing a message. | | [EncryptingAlgorithm](#encryptingalgorithm-property-smime-class) | The property includes textual description of the encrypting algorithm. | | [IncludeCertificate](#includecertificate-property-smime-class) | This property specifies whether to include the signer's certificate with the signed message. | | [IncludeChain](#includechain-property-smime-class) | This property specifies whether to include the signer's certificate chain with the signed message. | | [IncludeHeaders](#includeheaders-property-smime-class) | This property tells the class whether to include the headers when encoding the message. | | [InputFile](#inputfile-property-smime-class) | This property includes the file to process. | | [InputMessage](#inputmessage-property-smime-class) | This property includes the message to process. | | [InputMessageHeaders](#inputmessageheaders-property-smime-class) | This property includes a collection of headers from the S/MIME message. | | [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class) | This property includes the string version of headers from the S/MIME message. | | [InternalHeaders](#internalheaders-property-smime-class) | This property includes the headers of the MIME entity inside the encrypted or signed message. | | [OutputFile](#outputfile-property-smime-class) | This property specifies the output file. | | [OutputMessage](#outputmessage-property-smime-class) | This property includes the output message after processing. | | [OutputMessageHeaders](#outputmessageheaders-property-smime-class) | This property includes a collection of headers from the S/MIME message. | | [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) | This property includes a string version of headers from the S/MIME message. | | [Overwrite](#overwrite-property-smime-class) | This property indicates whether or not the class should overwrite files. | | [RecipientCerts](#recipientcerts-property-smime-class) | This property includes a collection of recipient certificates of the message. | | [SignerCert](#signercert-property-smime-class) | This property contains the certificate of the message signer. | | [SignerCertChain](#signercertchain-property-smime-class) | This property includes the certificate chain of the signing certificate. | | [SigningAlgorithm](#signingalgorithm-property-smime-class) | This property includes a textual description of the signature hash algorithm. | | [UseOAEP](#useoaep-property-smime-class) | This property specifies whether or not to use Optimal Asymmetric Encryption Padding (OAEP). | | [UsePSS](#usepss-property-smime-class) | This property specifies whether or not RSA-PSS will be used during signing and verification. | ## Method List *The following is the full list of the methods of the class with short descriptions. Click on the links for further details.* | | | | --- | --- | | [AddRecipientCert](#addrecipientcert-method-smime-class) | This method is used to add recipient certificates used to encrypt messages. | | [CheckMessageEncrypted](#checkmessageencrypted-method-smime-class) | This method checks whether or not the current message is encrypted. | | [CheckMessageSigned](#checkmessagesigned-method-smime-class) | This method checks whether or not the current message is signed. | | [Config](#config-method-smime-class) | Sets or retrieves a configuration setting. | | [Decrypt](#decrypt-method-smime-class) | This method decrypts the current Message . | | [DecryptAndVerifySignature](#decryptandverifysignature-method-smime-class) | This method decrypts and verifies the signature of the current message. | | [Encrypt](#encrypt-method-smime-class) | This method encrypts the message. | | [GetRecipientInfo](#getrecipientinfo-method-smime-class) | This method gets the recipient information for an encrypted message. | | [GetSignerCertInfo](#getsignercertinfo-method-smime-class) | This method gets the signature information for an signed message. | | [Reset](#reset-method-smime-class) | This method resets the class properties. | | [Sign](#sign-method-smime-class) | This method signs the current message. | | [SignAndEncrypt](#signandencrypt-method-smime-class) | This method signs and encrypts the current message. | | [VerifySignature](#verifysignature-method-smime-class) | This method verifies the signature of the current message. | ## Event List *The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.* | | | | --- | --- | | [Error](#error-event-smime-class) | Fired when information is available about errors during data delivery. | | [RecipientInfo](#recipientinfo-event-smime-class) | This event is fired for each recipient certificate of the encrypted message. | | [SignerCertInfo](#signercertinfo-event-smime-class) | This event is fired during verification of the signed message. | ## Config Settings *The following is a list of config settings for the class with short descriptions. Click on the links for further details.* | | | | --- | --- | | [ApplyB64Encoding](#ApplyB64Encoding) | Instructs the class to base64 encode the message when signing or encrypting. | | [CSP](#CSP) | The Cryptographic Service Provider. | | [GenerateSignatureTimestamp](#GenerateSignatureTimestamp) | Whether to generate timestamps in signatures. | | [IncludeHeaders](#IncludeHeaders) | Tells the class whether to include the headers when encoding the message. | | [IncludeInternalHeaders](#IncludeInternalHeaders) | Tells the class whether or not to include the internal headers when encoding the message. | | [InputContentTransferEncoding](#InputContentTransferEncoding) | Sets the Content-Transfer-Encoding for the signed message. | | [InputContentType](#InputContentType) | Sets the Content-Type for the signed message. | | [InputMessageEncrypted](#InputMessageEncrypted) | Whether or not the input message is encrypted. | | [InputMessageSigned](#InputMessageSigned) | Whether or not the input message is signed. | | [NormalizeCRLF](#NormalizeCRLF) | Whether or not the class will normalize line endings of the input data to CrLf. | | [OAEPMGF1HashAlgorithm](#OAEPMGF1HashAlgorithm) | The MGF1 hash algorithm used with OAEP. | | [OAEPParams](#OAEPParams) | The hex encoded OAEP parameters. | | [OAEPRSAHashAlgorithm](#OAEPRSAHashAlgorithm) | The RSA hash algorithm used with OAEP. | | [ParseInternalHeaders](#ParseInternalHeaders) | Tells the class whether or not to parse the message part headers when decrypting a message. | | [RecipientCert](#RecipientCert) | Used to specify the public certificate when using a PEM key to decrypt. | | [RecipientCertFile](#RecipientCertFile) | Used to specify the public certificate file when using a PEM key to decrypt. | | [RecipientInfoType](#RecipientInfoType) | The type of signer information to include in the signed message. | | [SignerInfoType](#SignerInfoType) | The type of signer information to include in the signed message. | | [UseAlgorithmOIDs](#UseAlgorithmOIDs) | Whether OIDs are used when providing information about the algorithms. | | [UseCryptoAPI](#UseCryptoAPI) | Whether to use the Microsoft Crypto API for cryptographic message generation. | | [BuildInfo](#BuildInfo) | Information about the product's build. | | [CodePage](#CodePage) | The system code page used for Unicode to Multibyte translations. | | [LicenseInfo](#LicenseInfo) | Information about the current license. | | [MaskSensitiveData](#MaskSensitiveData) | Whether sensitive data is masked in log messages. | | [ProcessIdleEvents](#ProcessIdleEvents) | Whether the class uses its internal event loop to process events when the main thread is idle. | | [SelectWaitMillis](#SelectWaitMillis) | The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process. | | [UseInternalSecurityAPI](#UseInternalSecurityAPI) | Whether or not to use the system security libraries or an internal implementation. | # Certificate Property ([SMIME](#smime-class) Class) This property includes the current selected certificate. ## Syntax ```text IPWorksSMIMECertificate* GetCertificate(); int SetCertificate(IPWorksSMIMECertificate* val); ``` ## Remarks This property is populated when a specified certificate is found or loaded by the class. This property is used to specify private keys. Set this property to a valid [Certificate](#certificate-type) object to perform different operations, such as [Sign](#sign-method-smime-class), [Decrypt](#decrypt-method-smime-class), [SignAndEncrypt](#signandencrypt-method-smime-class), or [DecryptAndVerifySignature](#decryptandverifysignature-method-smime-class). ## Data Type [IPWorksSMIMECertificate](#certificate-type) # DetachedSignature Property ([SMIME](#smime-class) Class) This property specifies whether to include a detached signature when signing a message. ## Syntax ```text ANSI (Cross Platform) int GetDetachedSignature();int SetDetachedSignature(int bDetachedSignature); Unicode (Windows) BOOL GetDetachedSignature();INT SetDetachedSignature(BOOL bDetachedSignature); ``` ## Default Value TRUE ## Remarks This property specifies whether to include a detached signature when signing a message. If the value of this property is True, Message will be encoded as a multipart/signed MIME message with a detached signature when calling [Sign](#sign-method-smime-class). This will create a message with two MIME parts, one with the contents of Message, and another with the detached signature. If this property is False, the current contents of Message will be PKCS encoded and included with the signature in Message. This will create a single-part message with no MIME boundaries. ## Data Type Boolean # EncryptingAlgorithm Property ([SMIME](#smime-class) Class) The property includes textual description of the encrypting algorithm. ## Syntax ```text ANSI (Cross Platform) char* GetEncryptingAlgorithm();int SetEncryptingAlgorithm(const char* lpszEncryptingAlgorithm); Unicode (Windows) LPWSTR GetEncryptingAlgorithm();INT SetEncryptingAlgorithm(LPCWSTR lpszEncryptingAlgorithm); ``` ## Default Value "3DES" ## Remarks This property contains either the name of the algorithm (such as *3DES* or *AES*), or an object identifier (OID) string representing the algorithm. Possible values are as follows: - "3DES" - "DES" - "RC2CBC40" - "RC2CBC64" - "RC2CBC128" or "RC2" - "AESCBC128" or "AES" - "AESCBC192" - "AESCBC256" - "AESGCM128" or "AESGCM" - "AESGCM192" - "AESGCM256" ## Data Type String # IncludeCertificate Property ([SMIME](#smime-class) Class) This property specifies whether to include the signer's certificate with the signed message. ## Syntax ```text ANSI (Cross Platform) int GetIncludeCertificate();int SetIncludeCertificate(int bIncludeCertificate); Unicode (Windows) BOOL GetIncludeCertificate();INT SetIncludeCertificate(BOOL bIncludeCertificate); ``` ## Default Value TRUE ## Remarks If this property is set to True, the certificate used to sign the message will be encoded and included in a message signature when calling [Sign](#sign-method-smime-class) or [SignAndEncrypt](#signandencrypt-method-smime-class). Including a certificate is the preferred method of building signed messages. If you do not include a certificate, the message recipient may not be able to verify the sender's signature. ## Data Type Boolean # IncludeChain Property ([SMIME](#smime-class) Class) This property specifies whether to include the signer's certificate chain with the signed message. ## Syntax ```text ANSI (Cross Platform) int GetIncludeChain();int SetIncludeChain(int bIncludeChain); Unicode (Windows) BOOL GetIncludeChain();INT SetIncludeChain(BOOL bIncludeChain); ``` ## Default Value FALSE ## Remarks If this property is set to True, the entire certificate's chain that was used to sign the message will be encoded and included in the message signature when calling [Sign](#sign-method-smime-class) or [SignAndEncrypt](#signandencrypt-method-smime-class). NOTE: To include the chain, the [IncludeCertificate](#includecertificate-property-smime-class) property must also be set to true. ## Data Type Boolean # IncludeHeaders Property ([SMIME](#smime-class) Class) This property tells the class whether to include the headers when encoding the message. ## Syntax ```text ANSI (Cross Platform) int GetIncludeHeaders();int SetIncludeHeaders(int bIncludeHeaders); Unicode (Windows) BOOL GetIncludeHeaders();INT SetIncludeHeaders(BOOL bIncludeHeaders); ``` ## Default Value FALSE ## Remarks If True, the class will include the headers when [Sign](#sign-method-smime-class), [Encrypt](#encrypt-method-smime-class), or [SignAndEncrypt](#signandencrypt-method-smime-class) are called. If False, only the message will be encoded. The default value for IncludeHeaders is False. ## Data Type Boolean # InputFile Property ([SMIME](#smime-class) Class) This property includes the file to process. ## Syntax ```text ANSI (Cross Platform) char* GetInputFile();int SetInputFile(const char* lpszInputFile); Unicode (Windows) LPWSTR GetInputFile();INT SetInputFile(LPCWSTR lpszInputFile); ``` ## Default Value "" ## Remarks This property specifies the file to be processed. Set this property to the full or relative path to the file that will be processed. **Encrypt and/or Sign** When encrypting or signing, this may be set to a file containing content that will be encrypted and/or signed. **Decrypt and/or Verify** When decrypting or verifying a signature, this may be set to a file containing the fully encoded S/MIME message. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - InputFile - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). ## Data Type String # InputMessage Property ([SMIME](#smime-class) Class) This property includes the message to process. ## Syntax ```text ANSI (Cross Platform) int GetInputMessage(char* &lpInputMessage, int &lenInputMessage);int SetInputMessage(const char* lpInputMessage, int lenInputMessage); Unicode (Windows) INT GetInputMessage(LPSTR &lpInputMessage, INT &lenInputMessage);INT SetInputMessage(LPCSTR lpInputMessage, INT lenInputMessage); ``` ## Default Value "" ## Remarks This property specifies the message to be processed. **Encrypt and/or Sign** When encrypting or signing, this may be set to the content that will be encrypted and/or signed. **Decrypt and/or Verify** When decrypting or verifying a signature, this may be set to the fully encoded S/MIME message. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - InputMessage When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). ## Data Type Binary String # InputMessageHeaders Property ([SMIME](#smime-class) Class) This property includes a collection of headers from the S/MIME message. ## Syntax ```text IPWorksSMIMEList* GetInputMessageHeaders(); int SetInputMessageHeaders(IPWorksSMIMEList* val); ``` ## Remarks This property contains a collection of headers from the S/MIME message. This property may be set to the headers of the message that will be decrypted/verified. This property is not available at design time. ## Data Type [IPWorksSMIMEHeader](#header-type) # InputMessageHeadersString Property ([SMIME](#smime-class) Class) This property includes the string version of headers from the S/MIME message. ## Syntax ```text ANSI (Cross Platform) char* GetInputMessageHeadersString();int SetInputMessageHeadersString(const char* lpszInputMessageHeadersString); Unicode (Windows) LPWSTR GetInputMessageHeadersString();INT SetInputMessageHeadersString(LPCWSTR lpszInputMessageHeadersString); ``` ## Default Value "" ## Remarks This property contains the string version of headers from the S/MIME message. This property may be set to the headers of the message that will be decrypted/verified. ## Data Type String # InternalHeaders Property ([SMIME](#smime-class) Class) This property includes the headers of the MIME entity inside the encrypted or signed message. ## Syntax ```text ANSI (Cross Platform) char* GetInternalHeaders();int SetInternalHeaders(const char* lpszInternalHeaders); Unicode (Windows) LPWSTR GetInternalHeaders();INT SetInternalHeaders(LPCWSTR lpszInternalHeaders); ``` ## Default Value "" ## Remarks After an encryption, decryption, signing, or verification operation is completed, this property shows the headers of the encrypted or signed message part. This property is not available at design time. ## Data Type String # OutputFile Property ([SMIME](#smime-class) Class) This property specifies the output file. ## Syntax ```text ANSI (Cross Platform) char* GetOutputFile();int SetOutputFile(const char* lpszOutputFile); Unicode (Windows) LPWSTR GetOutputFile();INT SetOutputFile(LPCWSTR lpszOutputFile); ``` ## Default Value "" ## Remarks This property specifies the file to which the output will be written. This may be set to an absolute or relative path. **Encrypt and/or Sign** When encrypting or signing, this specifies a file where the fully encoded S/MIME message will be written. **Decrypt and/or Verify** When decrypting or verifying a signature, this specifies a file where the decrypted/verified content will be written. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - OutputFile - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. ## Data Type String # OutputMessage Property ([SMIME](#smime-class) Class) This property includes the output message after processing. ## Syntax ```text ANSI (Cross Platform) int GetOutputMessage(char* &lpOutputMessage, int &lenOutputMessage); Unicode (Windows) INT GetOutputMessage(LPSTR &lpOutputMessage, INT &lenOutputMessage); ``` ## Default Value "" ## Remarks This property will be populated with the output of the operation if [OutputFile](#outputfile-property-smime-class) is not set. **Encrypt and/or Sign** When encrypting or signing, this will hold the fully encoded S/MIME message. **Decrypt and/or Verify** When decrypting or verifying a signature, this will hold the decrypted/verified content. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - OutputMessage: The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. This property is read-only. ## Data Type Binary String # OutputMessageHeaders Property ([SMIME](#smime-class) Class) This property includes a collection of headers from the S/MIME message. ## Syntax ```text IPWorksSMIMEList* GetOutputMessageHeaders(); ``` ## Remarks The class will populate this property after signing and/or encrypting. The user should use these additional headers when emailing or sending the [OutputMessage](#outputmessage-property-smime-class). This can be done by including these headers in the *OtherHeaders* property of the class that you wish to send the message with. After the decryption or verification, this property contains the headers of the verified or decrypted message. This property is read-only and not available at design time. ## Data Type [IPWorksSMIMEHeader](#header-type) # OutputMessageHeadersString Property ([SMIME](#smime-class) Class) This property includes a string version of headers from the S/MIME message. ## Syntax ```text ANSI (Cross Platform) char* GetOutputMessageHeadersString(); Unicode (Windows) LPWSTR GetOutputMessageHeadersString(); ``` ## Default Value "" ## Remarks This property contains the string version of headers from the S/MIME message. The class will populate this property after signing and/or encrypting. The user should use these additional headers when emailing or sending the [OutputMessage](#outputmessage-property-smime-class). This can be done by including these headers in the *OtherHeaders* property of the class that you wish to send the message with. After the decryption or verification, this property contains the headers of the verified or decrypted message. This property is read-only. ## Data Type String # Overwrite Property ([SMIME](#smime-class) Class) This property indicates whether or not the class should overwrite files. ## Syntax ```text ANSI (Cross Platform) int GetOverwrite();int SetOverwrite(int bOverwrite); Unicode (Windows) BOOL GetOverwrite();INT SetOverwrite(BOOL bOverwrite); ``` ## Default Value TRUE ## Remarks This property indicates whether or not the class will overwrite [OutputFile](#outputfile-property-smime-class). If Overwrite is False, an error will be thrown whenever [OutputFile](#outputfile-property-smime-class) exists before an operation. The default value is False. ## Data Type Boolean # RecipientCerts Property ([SMIME](#smime-class) Class) This property includes a collection of recipient certificates of the message. ## Syntax ```text IPWorksSMIMEList* GetRecipientCerts(); int SetRecipientCerts(IPWorksSMIMEList* val); ``` ## Remarks This property is used to specify the certificates of the intended recipients of the encrypted message. This property must be set before calling [Encrypt](#encrypt-method-smime-class) or [SignAndEncrypt](#signandencrypt-method-smime-class) methods. This property's collection must be filled out with valid public key [Certificate](#certificate-type) type objects. To set a certificate, you may set the [Encoded](#Certificate_f_Encoded) field to the encoded certificate. To select a certificate, use the [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields. This property is not available at design time. ## Data Type [IPWorksSMIMECertificate](#certificate-type) # SignerCert Property ([SMIME](#smime-class) Class) This property contains the certificate of the message signer. ## Syntax ```text IPWorksSMIMECertificate* GetSignerCert(); int SetSignerCert(IPWorksSMIMECertificate* val); ``` ## Remarks This property contains the certificate of the message signer. When calling [VerifySignature](#verifysignature-method-smime-class) or [DecryptAndVerifySignature](#decryptandverifysignature-method-smime-class), this property will contain the certificate of the sender, if attached. To verify messages without an attached certificate, set this property before calling [VerifySignature](#verifysignature-method-smime-class) or [DecryptAndVerifySignature](#decryptandverifysignature-method-smime-class). ## Data Type [IPWorksSMIMECertificate](#certificate-type) # SignerCertChain Property ([SMIME](#smime-class) Class) This property includes the certificate chain of the signing certificate. ## Syntax ```text IPWorksSMIMEList* GetSignerCertChain(); ``` ## Remarks This property contains the certificate chain of the signing certificate. When calling [VerifySignature](#verifysignature-method-smime-class) or [DecryptAndVerifySignature](#decryptandverifysignature-method-smime-class), this property will be populated with the certificate chain of the sender if attached. NOTE: The [SignerCert](#signercert-property-smime-class) property will contain the signing certificate. The certificates in the signing certificate's chain will be placed in this property's collection. This property is read-only and not available at design time. ## Data Type [IPWorksSMIMECertificate](#certificate-type) # SigningAlgorithm Property ([SMIME](#smime-class) Class) This property includes a textual description of the signature hash algorithm. ## Syntax ```text ANSI (Cross Platform) char* GetSigningAlgorithm();int SetSigningAlgorithm(const char* lpszSigningAlgorithm); Unicode (Windows) LPWSTR GetSigningAlgorithm();INT SetSigningAlgorithm(LPCWSTR lpszSigningAlgorithm); ``` ## Default Value "SHA256" ## Remarks This property specifies the hash algorithm used to prepare the message digest for signature. This property must contain either the name of the algorithm (such as *MD5* or *SHA1*), or an object Id (OID) string representing the hash algorithm. Possible values are as follows: - sha1 - md5 - sha-256 (default) - sha-384 - sha-512 - sha-224 When read, the value of the property always contains the OID of the algorithm, or an empty string if the algorithm is unknown. ## Data Type String # UseOAEP Property ([SMIME](#smime-class) Class) This property specifies whether or not to use Optimal Asymmetric Encryption Padding (OAEP). ## Syntax ```text ANSI (Cross Platform) int GetUseOAEP();int SetUseOAEP(int bUseOAEP); Unicode (Windows) BOOL GetUseOAEP();INT SetUseOAEP(BOOL bUseOAEP); ``` ## Default Value FALSE ## Remarks This property specifies whether or not to use Optimal Asymmetric Encryption Padding (OAEP). By default, this value is False and the class will use PKCS1. To specify nondefault OAEP options, please see [OAEPRSAHashAlgorithm](#OAEPRSAHashAlgorithm), [OAEPMGF1HashAlgorithm](#OAEPMGF1HashAlgorithm), and [OAEPParams](#OAEPParams) ## Data Type Boolean # UsePSS Property ([SMIME](#smime-class) Class) This property specifies whether or not RSA-PSS will be used during signing and verification. ## Syntax ```text ANSI (Cross Platform) int GetUsePSS();int SetUsePSS(int bUsePSS); Unicode (Windows) BOOL GetUsePSS();INT SetUsePSS(BOOL bUsePSS); ``` ## Default Value FALSE ## Remarks This property specifies whether or not RSA-PSS will be used when signing and verifying messages. The default value is False. ## Data Type Boolean # AddRecipientCert Method ([SMIME](#smime-class) Class) This method is used to add recipient certificates used to encrypt messages. ## Syntax ```text ANSI (Cross Platform) int AddRecipientCert(const char* lpCertEncoded, int lenCertEncoded); Unicode (Windows) INT AddRecipientCert(LPCSTR lpCertEncoded, INT lenCertEncoded); ``` ## Remarks This method is used to add recipient certificates to the internal MessageRecipients collection used to encrypt the Message. The recipient certificate must be a valid PKCS-encoded certificate. If the certificate provided is Base64 encoded, it will be decoded first by the object. The CertMgr class may be used to retrieve the appropriate certificate from the system. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # CheckMessageEncrypted Method ([SMIME](#smime-class) Class) This method checks whether or not the current message is encrypted. ## Syntax ```text ANSI (Cross Platform) bool CheckMessageEncrypted(); Unicode (Windows) bool CheckMessageEncrypted(); ``` ## Remarks This method is used to check whether or not the current message is encrypted. This method will return True, if the current message appears to be encrypted, according to the value of [OutputMessageHeaders](#outputmessageheaders-property-smime-class). ## Error Handling (C++) This method returns a Boolean value; after it returns, call the *GetLastErrorCode()* method to obtain its result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. # CheckMessageSigned Method ([SMIME](#smime-class) Class) This method checks whether or not the current message is signed. ## Syntax ```text ANSI (Cross Platform) bool CheckMessageSigned(); Unicode (Windows) bool CheckMessageSigned(); ``` ## Remarks This method is used to check whether or not the current message is signed. This method will return True, if the current message appears to be signed, according to the value of [OutputMessageHeaders](#outputmessageheaders-property-smime-class). NOTE: A message that is both signed and encrypted will not appear to be signed until after it is decrypted. ## Error Handling (C++) This method returns a Boolean value; after it returns, call the *GetLastErrorCode()* method to obtain its result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. # Config Method ([SMIME](#smime-class) Class) Sets or retrieves a configuration setting. ## Syntax ```text ANSI (Cross Platform) char* Config(const char* lpszConfigurationString); Unicode (Windows) LPWSTR Config(LPCWSTR lpszConfigurationString); ``` ## Remarks Config is a generic method available in every class. It is used to set and retrieve [configuration settings](#config-settings-smime-class) for the class. These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these *internal properties* is provided through the Config method. To set a configuration setting named *PROPERTY*, you must call *Config("PROPERTY=VALUE")*, where *VALUE* is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter). To read (query) the value of a [configuration setting](#config-settings-smime-class), you must call *Config("PROPERTY")*. The value will be returned as a string. ## Error Handling (C++) This method returns a String value; after it returns, call the *GetLastErrorCode()* method to obtain its result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. # Decrypt Method ([SMIME](#smime-class) Class) This method decrypts the current Message . ## Syntax ```text ANSI (Cross Platform) int Decrypt(); Unicode (Windows) INT Decrypt(); ``` ## Remarks This method takes attempts to decrypt the encrypted message using the certificate in [Certificate](#certificate-property-smime-class). **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # DecryptAndVerifySignature Method ([SMIME](#smime-class) Class) This method decrypts and verifies the signature of the current message. ## Syntax ```text ANSI (Cross Platform) int DecryptAndVerifySignature(); Unicode (Windows) INT DecryptAndVerifySignature(); ``` ## Remarks This method attempts to both decrypt and verify the signature of the message. All of the properties affected by calling the [Decrypt](#decrypt-method-smime-class) and [VerifySignature](#verifysignature-method-smime-class) methods are affected in the same manner. NOTE: This function does not attempt to check the validity of the signing certificate. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # Encrypt Method ([SMIME](#smime-class) Class) This method encrypts the message. ## Syntax ```text ANSI (Cross Platform) int Encrypt(); Unicode (Windows) INT Encrypt(); ``` ## Remarks This method encrypts the data specified in [InputFile](#inputfile-property-smime-class) or [InputMessage](#inputmessage-property-smime-class) in a PKCS-encoded envelope with all of the recipient certificates specified in the MessageRecipients collection. The result of the encrypted data will be written to [OutputFile](#outputfile-property-smime-class), or [OutputMessage](#outputmessage-property-smime-class). The [OutputMessageHeaders](#outputmessageheaders-property-smime-class) property will be filled with the required S/MIME headers. NOTE: The message headers, including the Sender, Recipient(s), and Subject, are not encrypted. If this is sensitive information, consider including these headers in the message body as a MIME entity and providing other headers for the S/MIME wrapper. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # GetRecipientInfo Method ([SMIME](#smime-class) Class) This method gets the recipient information for an encrypted message. ## Syntax ```text ANSI (Cross Platform) int GetRecipientInfo(); Unicode (Windows) INT GetRecipientInfo(); ``` ## Remarks This method will fire a [RecipientInfo](#recipientinfo-event-smime-class) event for every recipient certificate for which the Message has been encrypted. The event will contain information about the *Issuer* and the *SerialNumber* for each recipient of the message. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # GetSignerCertInfo Method ([SMIME](#smime-class) Class) This method gets the signature information for an signed message. ## Syntax ```text ANSI (Cross Platform) int GetSignerCertInfo(); Unicode (Windows) INT GetSignerCertInfo(); ``` ## Remarks This method retrieves information about the certificate used to sign the message. This may be called before calling [VerifySignature](#verifysignature-method-smime-class) to determine which certificate should be loaded for verification. When this method is called, the [SignerCertInfo](#signercertinfo-event-smime-class) event fires once for each signer of the message. Use the parameters of the [SignerCertInfo](#signercertinfo-event-smime-class) to determine which certificate to specify before calling [VerifySignature](#verifysignature-method-smime-class). NOTE: Use of this method is optional. If no certificate is specified before calling [VerifySignature](#verifysignature-method-smime-class), the class will fire the [SignerCertInfo](#signercertinfo-event-smime-class) and a certificate may be loaded from within the event at that time (if necessary). ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # Reset Method ([SMIME](#smime-class) Class) This method resets the class properties. ## Syntax ```text ANSI (Cross Platform) int Reset(); Unicode (Windows) INT Reset(); ``` ## Remarks This method resets the values of all message and certificate properties. It is an easy way to reset the class properties before starting to populate with new values. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # Sign Method ([SMIME](#smime-class) Class) This method signs the current message. ## Syntax ```text ANSI (Cross Platform) int Sign(); Unicode (Windows) INT Sign(); ``` ## Remarks This method digitally signs the input data with the the certificate provided. Certificates are provided by specifying the [Certificate](#certificate-property-smime-class) property. The [IncludeCertificate](#includecertificate-property-smime-class) and [DetachedSignature](#detachedsignature-property-smime-class) properties allow you to specify addition details about what to include when signing the message. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # SignAndEncrypt Method ([SMIME](#smime-class) Class) This method signs and encrypts the current message. ## Syntax ```text ANSI (Cross Platform) int SignAndEncrypt(); Unicode (Windows) INT SignAndEncrypt(); ``` ## Remarks This method both signs and encrypts the input message into a single PKCS-encoded envelope. The value in [DetachedSignature](#detachedsignature-property-smime-class) is ignored: the class will always generate an attached signature when calling this method. All other properties used by calling the [Sign](#sign-method-smime-class) and [Encrypt](#encrypt-method-smime-class) methods are used in the same manner. NOTE: The message headers, including the Sender, Recipient(s), and Subject, are not encrypted. If this is sensitive information, consider including these headers in the message body as a MIME entity and providing other headers for the S/MIME wrapper. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # VerifySignature Method ([SMIME](#smime-class) Class) This method verifies the signature of the current message. ## Syntax ```text ANSI (Cross Platform) int VerifySignature(); Unicode (Windows) INT VerifySignature(); ``` ## Remarks This method attempts to verify the signature of the input message. If the message does not have a certificate attached, the class will attempt to verify the signature using the certificate supplied in [SignerCert](#signercert-property-smime-class) (if any). If no certificate is found, the class fails with an error. If this method is successful, the [SignerCert](#signercert-property-smime-class) property will contain the certificate information of the message signer. NOTE: This function does not attempt to check the validity of the signing certificate. **Input and Output Properties** The class will determine the source and destination of the input and output based on which properties are set. The order in which the input properties are checked is as follows: - SetInputStream - [InputFile](#inputfile-property-smime-class) - [InputMessage](#inputmessage-property-smime-class) When a valid source is found, the search stops. The order in which the output properties are checked is as follows: - SetOutputStream - [OutputFile](#outputfile-property-smime-class) - [OutputMessage](#outputmessage-property-smime-class): The output data is written to this property if no other destination is specified. When using streams, you may need to additionally set [CloseInputStreamAfterProcessing](#CloseInputStreamAfterProcessing) or [CloseOutputStreamAfterProcessing](#CloseOutputStreamAfterProcessing). The headers of the input message (if any) will be read from [InputMessageHeaders](#inputmessageheaders-property-smime-class) or [InputMessageHeadersString](#inputmessageheadersstring-property-smime-class). The headers of the resulting message will be available in the [OutputMessageHeaders](#outputmessageheaders-property-smime-class) and [OutputMessageHeadersString](#outputmessageheadersstring-property-smime-class) properties. ## Error Handling (C++) This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.) # Error Event ([SMIME](#smime-class) Class) Fired when information is available about errors during data delivery. ## Syntax ```text ANSI (Cross Platform) virtual int FireError(SMIMEErrorEventParams *e); typedef struct { int ErrorCode; const char *Description; int reserved; } SMIMEErrorEventParams; Unicode (Windows) virtual INT FireError(SMIMEErrorEventParams *e); typedef struct { INT ErrorCode; LPCWSTR Description; INT reserved; } SMIMEErrorEventParams; ``` ## Remarks The Error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error. The *ErrorCode* parameter contains an error code, and the *Description* parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [Error Codes](#trappable-errors-smime-class) section. # RecipientInfo Event ([SMIME](#smime-class) Class) This event is fired for each recipient certificate of the encrypted message. ## Syntax ```text ANSI (Cross Platform) virtual int FireRecipientInfo(SMIMERecipientInfoEventParams *e); typedef struct { const char *Issuer; const char *SerialNumber; const char *SubjectKeyIdentifier; const char *EncryptionAlgorithm; int reserved; } SMIMERecipientInfoEventParams; Unicode (Windows) virtual INT FireRecipientInfo(SMIMERecipientInfoEventParams *e); typedef struct { LPCWSTR Issuer; LPCWSTR SerialNumber; LPCWSTR SubjectKeyIdentifier; LPCWSTR EncryptionAlgorithm; INT reserved; } SMIMERecipientInfoEventParams; ``` ## Remarks When [GetRecipientInfo](#getrecipientinfo-method-smime-class) is called on a valid encrypted message, this event will fire once for each recipient certificate that the message has been encrypted for. This may be used to identify the certificate to load. *Issuer* is the subject of the issuer certificate. *SerialNumber* is the serial number of the encryption certificate. *SubjectKeyIdentifier* is the X.509 subjectKeyIdentifier extension value of the certificate used to sign the message encoded as a hex string. *EncryptionAlgorithm* is the encryption algorithm used to encrypt the message. Possible values are as follows: - "3DES" - "DES" - "RC2CBC40" - "RC2CBC64" - "RC2CBC128" or "RC2" - "AESCBC128" or "AES" - "AESCBC192" - "AESCBC256" - "AESGCM128" or "AESGCM" - "AESGCM192" - "AESGCM256" # SignerCertInfo Event ([SMIME](#smime-class) Class) This event is fired during verification of the signed message. ## Syntax ```text ANSI (Cross Platform) virtual int FireSignerCertInfo(SMIMESignerCertInfoEventParams *e); typedef struct { const char *Issuer; const char *SerialNumber; const char *SubjectKeyIdentifier; const char *CertEncoded; int lenCertEncoded; int reserved; } SMIMESignerCertInfoEventParams; Unicode (Windows) virtual INT FireSignerCertInfo(SMIMESignerCertInfoEventParams *e); typedef struct { LPCWSTR Issuer; LPCWSTR SerialNumber; LPCWSTR SubjectKeyIdentifier; LPCSTR CertEncoded; INT lenCertEncoded; INT reserved; } SMIMESignerCertInfoEventParams; ``` ## Remarks During verification, this event will be raised while parsing the signer's certificate information. The parameters that are populated depend on the options used when the message was originally signed. This information may be used to select the correct certificate for [SignerCert](#signercert-property-smime-class) to verify the signature. The following parameters may be populated: *Issuer* specifies the subject of the issuer of the certificate used to sign the message. *SerialNumber* is the serial number of the certificate used to sign the message. *SubjectKeyIdentifier* is the X.509 subjectKeyIdentifier extension value of the certificate used to sign the message encoded as a hex string. *CertEncoded* is the PEM (Base64 encoded) public certificate needed to verify the signature. NOTE: When this value is present, the class will automatically use this value to perform signature verification. The [SignerCert](#signercert-property-smime-class) property may be set from within this event. In this manner, the decision of which signer certificate to load may be delayed until the parameters of this event are inspected and the correct certificate can be located and loaded. # Certificate Type This is the digital certificate being used. ## Syntax *IPWorksSMIMECertificate* (declared in *ipworkssmime.h*) ## Remarks This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates. The following fields are available: - [EffectiveDate](#Certificate_f_EffectiveDate) - [ExpirationDate](#Certificate_f_ExpirationDate) - [ExtendedKeyUsage](#Certificate_f_ExtendedKeyUsage) - [Fingerprint](#Certificate_f_Fingerprint) - [FingerprintSHA1](#Certificate_f_FingerprintSHA1) - [FingerprintSHA256](#Certificate_f_FingerprintSHA256) - [Issuer](#Certificate_f_Issuer) - [PrivateKey](#Certificate_f_PrivateKey) - [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) - [PrivateKeyContainer](#Certificate_f_PrivateKeyContainer) - [PublicKey](#Certificate_f_PublicKey) - [PublicKeyAlgorithm](#Certificate_f_PublicKeyAlgorithm) - [PublicKeyLength](#Certificate_f_PublicKeyLength) - [SerialNumber](#Certificate_f_SerialNumber) - [SignatureAlgorithm](#Certificate_f_SignatureAlgorithm) - [Store](#Certificate_f_Store) - [StorePassword](#Certificate_f_StorePassword) - [StoreType](#Certificate_f_StoreType) - [SubjectAltNames](#Certificate_f_SubjectAltNames) - [ThumbprintMD5](#Certificate_f_ThumbprintMD5) - [ThumbprintSHA1](#Certificate_f_ThumbprintSHA1) - [ThumbprintSHA256](#Certificate_f_ThumbprintSHA256) - [Usage](#Certificate_f_Usage) - [UsageFlags](#Certificate_f_UsageFlags) - [Version](#Certificate_f_Version) - [Subject](#Certificate_f_Subject) - [Encoded](#Certificate_f_Encoded) ## Fields **EffectiveDate** *char* (read-only)* *Default Value: ""* The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date: 23-Jan-2000 15:00:00. **ExpirationDate** *char* (read-only)* *Default Value: ""* The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date: 23-Jan-2001 15:00:00. **ExtendedKeyUsage** *char* (read-only)* *Default Value: ""* A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs). **Fingerprint** *char* (read-only)* *Default Value: ""* The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02* **FingerprintSHA1** *char* (read-only)* *Default Value: ""* The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84* **FingerprintSHA256** *char* (read-only)* *Default Value: ""* The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys. The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53* **Issuer** *char* (read-only)* *Default Value: ""* The issuer of the certificate. This field contains a string representation of the name of the issuing authority for the certificate. **PrivateKey** *char* (read-only)* *Default Value: ""* The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data. NOTE: The [PrivateKey](#Certificate_f_PrivateKey) may be available but not exportable. In this case, [PrivateKey](#Certificate_f_PrivateKey) returns an empty string. **PrivateKeyAvailable** *int (read-only)* *Default Value: FALSE* Whether a [PrivateKey](#Certificate_f_PrivateKey) is available for the selected certificate. If [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) is True, the certificate may be used for authentication purposes (e.g., server authentication). **PrivateKeyContainer** *char* (read-only)* *Default Value: ""* The name of the [PrivateKey](#Certificate_f_PrivateKey) container for the certificate (if available). This functionality is available only on Windows platforms. **PublicKey** *char* (read-only)* *Default Value: ""* The public key of the certificate. The key is provided as PEM/Base64-encoded data. **PublicKeyAlgorithm** *char* (read-only)* *Default Value: ""* The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm. **PublicKeyLength** *int (read-only)* *Default Value: 0* The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048. **SerialNumber** *char* (read-only)* *Default Value: ""* The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number. **SignatureAlgorithm** *char* (read-only)* *Default Value: ""* The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm. **Store** *char** *Default Value: "MY"* The name of the certificate store for the client certificate. The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword). [Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details. Designations of certificate stores are platform dependent. The following designations are the most common User and Machine certificate stores in Windows: | | | | --- | --- | | MY | A certificate store holding personal certificates with their associated private keys. | | CA | Certifying authority certificates. | | ROOT | Root certificates. | When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store). **StorePassword** *char** *Default Value: ""* If the type of certificate store requires a password, this field is used to specify the password needed to open the certificate store. **StoreType** *int* *Default Value: 0* The type of certificate store for this certificate. The class supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the class will automatically determine the type. This field can take one of the following values: ```csharp sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll", "123456", // PIN "CN=cert_subject"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` ```csharp certmgr.CertStoreType = CertStoreTypes.cstPKCS11; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; // PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22); ``` | | | | --- | --- | | 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. | | 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. | | 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. | | 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. | | 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. | | 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. | | 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. | | 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. | | 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. | | 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. | | 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. | | 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. | | 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. | | 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. | | 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). | | 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). | | 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. | | 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. | | 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). | | 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). | | 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. | | 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. | | 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#certificate-type) object and pass cstPKCS11 as the [StoreType](#Certificate_f_StoreType), the full path of the PKCS#11 DLL as the [Store](#Certificate_f_Store), and the PIN as the [StorePassword](#Certificate_f_StorePassword). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](CertMgr.md#CertMgr) class by calling the [ListStoreCertificates](CertMgr.md#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [CertList](CertMgr.md#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [Store](#Certificate_f_Store) and set [StorePassword](#Certificate_f_StorePassword) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): | | 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. | **SubjectAltNames** *char* (read-only)* *Default Value: ""* Comma-separated lists of alternative subject names for the certificate. **ThumbprintMD5** *char* (read-only)* *Default Value: ""* The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **ThumbprintSHA1** *char* (read-only)* *Default Value: ""* The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **ThumbprintSHA256** *char* (read-only)* *Default Value: ""* The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed. **Usage** *char* (read-only)* *Default Value: ""* The text description of [UsageFlags](#Certificate_f_UsageFlags). This value will be one or more of the following strings and will be separated by commas: - Digital Signature - Non-Repudiation - Key Encipherment - Data Encipherment - Key Agreement - Certificate Signing - CRL Signing - Encipher Only If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names. **UsageFlags** *int (read-only)* *Default Value: 0* The flags that show intended use for the certificate. The value of [UsageFlags](#Certificate_f_UsageFlags) is a combination of the following flags: | | | | --- | --- | | 0x80 | Digital Signature | | 0x40 | Non-Repudiation | | 0x20 | Key Encipherment | | 0x10 | Data Encipherment | | 0x08 | Key Agreement | | 0x04 | Certificate Signing | | 0x02 | CRL Signing | | 0x01 | Encipher Only | Please see the [Usage](#Certificate_f_Usage) field for a text representation of [UsageFlags](#Certificate_f_UsageFlags). This functionality currently is not available when the provider is OpenSSL. **Version** *char* (read-only)* *Default Value: ""* The certificate's version number. The possible values are the strings "V1", "V2", and "V3". **Subject** *char** *Default Value: ""* The subject of the certificate used for client authentication. This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject. If a matching certificate is found, the field is set to the full subject of the matching certificate. If an exact match is not found, the store is searched for subjects containing the value of the property. If a match is still not found, the property is set to an empty string, and no certificate is selected. The special value "*" picks a random certificate in the certificate store. The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows: | Field | Meaning | | --- | --- | | CN | Common Name. This is commonly a hostname like www.server.com. | | O | Organization | | OU | Organizational Unit | | L | Locality | | S | State | | C | Country | | E | Email Address | If a field value contains a comma, it must be quoted. **Encoded** *char** *Default Value: ""* The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate. When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string. ## Constructors ```text Certificate() ``` Creates a instance whose properties can be set. ```text Certificate(const char* lpEncoded, int lenEncoded) ``` Parses * Encoded * as an X.509 public key. ```text Certificate(int iStoreType, const char* lpStore, int lenStore, const char* lpszStorePassword, const char* lpszSubject) ``` * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format. # Header Type This is an HTTP header as it is received from the server. ## Syntax *IPWorksSMIMEHeader* (declared in *ipworkssmime.h*) ## Remarks When a header is received through a Header event, it is parsed into a [Header](#header-type) type. This type contains a [Field](#Header_f_Field), and its corresponding [Value](#Header_f_Value). The following fields are available: - [Field](#Header_f_Field) - [Value](#Header_f_Value) ## Fields **Field** *char** *Default Value: ""* This field contains the name of the HTTP [Header](#header-type) (this is the same case as it is delivered). **Value** *char** *Default Value: ""* This field contains the [Header](#header-type) contents. ## Constructors ```text Header() ``` ```text Header(const char* lpszField, const char* lpszValue) ``` # IPWorksSMIMEList Type ## Syntax *IPWorksSMIMEList* (declared in *ipworkssmime.h*) ## Remarks *IPWorksSMIMEList* is a generic class that is used to hold a collection of objects of type *T*, where *T* is one of the custom types supported by the SMIME class. ```text int GetCount() {} ``` ```text int SetCount(int count) {} ``` ```text T* Get(int index) {} ``` ```text T* Set(int index, T* value) {} ``` | | | | --- | --- | | Methods | | | GetCount | This method returns the current size of the collection. | | SetCount | This method sets the size of the collection. This method returns 0 if setting the size was successful; or -1 if the collection is ReadOnly. When adding additional objects to a collection call this method to specify the new size. Increasing the size of the collection preserves existing objects in the collection. | | Get | This method gets the item at the specified position. The index parameter specifies the index of the item in the collection. This method returns NULL if an invalid index is specified. | | Set | This method sets the item at the specified position. The index parameter specifies the index of the item in the collection that is being set. This method returns -1 if an invalid index is specified. Note: Objects created using the new operator must be freed using the delete operator; they will not be automatically freed by the class. | # Config Settings ([SMIME](#smime-class) Class) The class accepts one or more of the following *configuration settings*. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these *internal properties* is provided through the [Config](#config-method-smime-class) method. ### SMIME Config Settings **ApplyB64Encoding**: Instructs the class to base64 encode the message when signing or encrypting.This configuration setting allows you to control the Base64 encoding of the resulting message. By default, this value is True, and the message will be Base64 encoded when signing or encrypting. NOTE: When signing, this configuration setting may be used only when [DetachedSignature](#detachedsignature-property-smime-class) is False. **CSP**: The Cryptographic Service Provider.For the Win32 editions, this configuration setting includes the name of the Cryptographic Service Provider used to provide access to encryption/decryption and signature operations. NOTE: This configuration setting may be used only when the [UseCryptoAPI](#UseCryptoAPI) is True. **GenerateSignatureTimestamp**: Whether to generate timestamps in signatures.If [GenerateSignatureTimestamp](#GenerateSignatureTimestamp) is True, a timestamp will be generated and added to all signatures created by the class. The default value is *True*. **IncludeHeaders**: Tells the class whether to include the headers when encoding the message.If set to True, the class will include the headers when [Sign](#sign-method-smime-class), [Encrypt](#encrypt-method-smime-class), or [SignAndEncrypt](#signandencrypt-method-smime-class) are called. If False, only the message will be encoded. The default value for [IncludeHeaders](#IncludeHeaders) is False. **IncludeInternalHeaders**: Tells the class whether or not to include the internal headers when encoding the message.If set to True, the class will include the internal message part headers when [Sign](#sign-method-smime-class), [Encrypt](#encrypt-method-smime-class), or [SignAndEncrypt](#signandencrypt-method-smime-class) are called. When set to False, only the message will be encoded. The default value for [IncludeInternalHeaders](#IncludeInternalHeaders) is True. **InputContentTransferEncoding**: Sets the Content-Transfer-Encoding for the signed message.This configuration setting specifies the Content-Transfer-Encoding header value in signed messages. By default, the class will automatically determine the Content-Transfer-Encoding based on the file extension set in [InputFile](#inputfile-property-smime-class). This setting may be set to override the determined value or to specify a value if data are read from [InputMessage](#inputmessage-property-smime-class). If no value is specified and a value cannot be automatically determined, the default value *7bit* will be used. NOTE: This setting is applicable only when calling [Sign](#sign-method-smime-class) or [SignAndEncrypt](#signandencrypt-method-smime-class) and [DetachedSignature](#detachedsignature-property-smime-class) is True. **InputContentType**: Sets the Content-Type for the signed message.This configuration setting specifies the Content-Type header value in signed messages. By default, the class will automatically determine the Content-Type based on the file extension set in [InputFile](#inputfile-property-smime-class). This setting may be set to override the determined value or to specify a value if data are read from [InputMessage](#inputmessage-property-smime-class). If no value is specified and a value cannot be automatically determined, the default value *text/plain; charset="iso-8859-1"* will be used. NOTE: This setting is applicable only when calling [Sign](#sign-method-smime-class) or [SignAndEncrypt](#signandencrypt-method-smime-class) and [DetachedSignature](#detachedsignature-property-smime-class) is True. **InputMessageEncrypted**: Whether or not the input message is encrypted.This configuration setting will return True if the input message appears to be encrypted according to the value of [InputMessageHeaders](#inputmessageheaders-property-smime-class). **InputMessageSigned**: Whether or not the input message is signed.This will return true if the input message appears to be signed according to the value of [InputMessageHeaders](#inputmessageheaders-property-smime-class). **NormalizeCRLF**: Whether or not the class will normalize line endings of the input data to CrLf.Setting this configuration setting to *True* will instruct the class to normalize the line endings of the input data to CrLf prior to processing. The default value is *False*. **OAEPMGF1HashAlgorithm**: The MGF1 hash algorithm used with OAEP.This configuration setting specifies the MGF1 hash algorithm used when [UseOAEP](#useoaep-property-smime-class) is set to True. The default value is *SHA256*. Possible values are as follows: - "SHA1" - "SHA224" - "SHA256" (default) - "SHA384" - "SHA512" - "RIPEMD160" - "MD2" - "MD5" - "MD5SHA1" Note: This setting is not applicable when [UseFIPSCompliantAPI](#UseFIPSCompliantAPI) is set to *true* or when the private key of the signing certificate is not exportable since the underlying system implementation does not support separate [OAEPRSAHashAlgorithm](#OAEPRSAHashAlgorithm) and [OAEPMGF1HashAlgorithm](#OAEPMGF1HashAlgorithm) values. In this case the [OAEPRSAHashAlgorithm](#OAEPRSAHashAlgorithm) is also used for MGF1. **OAEPParams**: The hex encoded OAEP parameters.This configuration setting optionally specifies Optimal Asymmetric Encryption Padding (OAEP) parameters to be used when [UseOAEP](#useoaep-property-smime-class) is set to True. The specified value should be hex encoded. **OAEPRSAHashAlgorithm**: The RSA hash algorithm used with OAEP.This configuration setting specifies that RSA hash algorithm used when [UseOAEP](#useoaep-property-smime-class) is set to True. The default value is *SHA256*. Possible values are as follows: - "SHA1" - "SHA224" - "SHA256" (default) - "SHA384" - "SHA512" - "RIPEMD160" - "MD2" - "MD5" - "MD5SHA1" **ParseInternalHeaders**: Tells the class whether or not to parse the message part headers when decrypting a message.If set to True, the class will parse the internal message part headers when [Decrypt](#decrypt-method-smime-class), or [DecryptAndVerifySignature](#decryptandverifysignature-method-smime-class) are called. These headers will be placed in the [InternalHeaders](#internalheaders-property-smime-class) property. If False, the entire message will be decoded. The default value for [ParseInternalHeaders](#ParseInternalHeaders) is True. **RecipientCert**: Used to specify the public certificate when using a PEM key to decrypt.When decrypting, the class must search through the Recipient Information collection to find which encrypted key to use for decryption. Because PEM keys do not contain a serial number or any additional information about the key itself, the public key associated with this private key must be supplied. This configuration setting may be set to the entire blob of the public certificate the class should use to select the correct recipient-encrypted key for decryption. **RecipientCertFile**: Used to specify the public certificate file when using a PEM key to decrypt.When decrypting, the class must search through the Recipient Information collection to find which encrypted key to use for decryption. Because PEM keys do not contain a serial number or any additional information about the key itself, the public key associated with this private key must be supplied. This configuration setting may be set to the file that contains the public certificate the class should use to select the correct recipient-encrypted key for decryption. **RecipientInfoType**: The type of signer information to include in the signed message.This configuration setting specifies which type of information about the recipient's encryption certificate is included in the encrypted message. Possible values are as follows: - 0 (issuerAndSerialNumber - default) - 1 (subjectKeyIdentifier) NOTE: When subjectKeyIdentifier is selected, the recipient's encryption certificate must contain the subjectKeyIdentifier extension. **SignerInfoType**: The type of signer information to include in the signed message.This configuration setting specifies which type of information about the signer certificate is included in the signed message. Possible values are as follows: - 0 (issuerAndSerialNumber - default) - 1 (subjectKeyIdentifier) NOTE: When subjectKeyIdentifier is selected, the signing certificate must contain the subjectKeyIdentifier extension. **UseAlgorithmOIDs**: Whether OIDs are used when providing information about the algorithms.This configuration setting controls whether the *EncryptionAlgorithm* parameter of the [RecipientInfo](#recipientinfo-event-smime-class) event is populated with the name of the algorithm, such as *3DES* or the corresponding OID such as *1.2.840.113549.3.7*. The default value is *False*, and the name of the algorithm is used. Set this to *True* to use the object identifiers instead. **UseCryptoAPI**: Whether to use the Microsoft Crypto API for cryptographic message generation. If [UseCryptoAPI](#UseCryptoAPI) is set to True, the class will use the Microsoft Crypto API to process encrypted and/or signed data. NOTE: Compression will be impossible in this case. If set to False (the default), the class will use its internal S/MIME engine. ### Base Config Settings **BuildInfo**: Information about the product's build.When queried, this setting will return a string containing information about the product's build. **CodePage**: The system code page used for Unicode to Multibyte translations.The default code page is Unicode UTF-8 (65001). The following is a list of valid code page identifiers: | | | | --- | --- | | Identifier | Name | | 037 | IBM EBCDIC - U.S./Canada | | 437 | OEM - United States | | 500 | IBM EBCDIC - International | | 708 | Arabic - ASMO 708 | | 709 | Arabic - ASMO 449+, BCON V4 | | 710 | Arabic - Transparent Arabic | | 720 | Arabic - Transparent ASMO | | 737 | OEM - Greek (formerly 437G) | | 775 | OEM - Baltic | | 850 | OEM - Multilingual Latin I | | 852 | OEM - Latin II | | 855 | OEM - Cyrillic (primarily Russian) | | 857 | OEM - Turkish | | 858 | OEM - Multilingual Latin I + Euro symbol | | 860 | OEM - Portuguese | | 861 | OEM - Icelandic | | 862 | OEM - Hebrew | | 863 | OEM - Canadian-French | | 864 | OEM - Arabic | | 865 | OEM - Nordic | | 866 | OEM - Russian | | 869 | OEM - Modern Greek | | 870 | IBM EBCDIC - Multilingual/ROECE (Latin-2) | | 874 | ANSI/OEM - Thai (same as 28605, ISO 8859-15) | | 875 | IBM EBCDIC - Modern Greek | | 932 | ANSI/OEM - Japanese, Shift-JIS | | 936 | ANSI/OEM - Simplified Chinese (PRC, Singapore) | | 949 | ANSI/OEM - Korean (Unified Hangul Code) | | 950 | ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) | | 1026 | IBM EBCDIC - Turkish (Latin-5) | | 1047 | IBM EBCDIC - Latin 1/Open System | | 1140 | IBM EBCDIC - U.S./Canada (037 + Euro symbol) | | 1141 | IBM EBCDIC - Germany (20273 + Euro symbol) | | 1142 | IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) | | 1143 | IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) | | 1144 | IBM EBCDIC - Italy (20280 + Euro symbol) | | 1145 | IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) | | 1146 | IBM EBCDIC - United Kingdom (20285 + Euro symbol) | | 1147 | IBM EBCDIC - France (20297 + Euro symbol) | | 1148 | IBM EBCDIC - International (500 + Euro symbol) | | 1149 | IBM EBCDIC - Icelandic (20871 + Euro symbol) | | 1200 | Unicode UCS-2 Little-Endian (BMP of ISO 10646) | | 1201 | Unicode UCS-2 Big-Endian | | 1250 | ANSI - Central European | | 1251 | ANSI - Cyrillic | | 1252 | ANSI - Latin I | | 1253 | ANSI - Greek | | 1254 | ANSI - Turkish | | 1255 | ANSI - Hebrew | | 1256 | ANSI - Arabic | | 1257 | ANSI - Baltic | | 1258 | ANSI/OEM - Vietnamese | | 1361 | Korean (Johab) | | 10000 | MAC - Roman | | 10001 | MAC - Japanese | | 10002 | MAC - Traditional Chinese (Big5) | | 10003 | MAC - Korean | | 10004 | MAC - Arabic | | 10005 | MAC - Hebrew | | 10006 | MAC - Greek I | | 10007 | MAC - Cyrillic | | 10008 | MAC - Simplified Chinese (GB 2312) | | 10010 | MAC - Romania | | 10017 | MAC - Ukraine | | 10021 | MAC - Thai | | 10029 | MAC - Latin II | | 10079 | MAC - Icelandic | | 10081 | MAC - Turkish | | 10082 | MAC - Croatia | | 12000 | Unicode UCS-4 Little-Endian | | 12001 | Unicode UCS-4 Big-Endian | | 20000 | CNS - Taiwan | | 20001 | TCA - Taiwan | | 20002 | Eten - Taiwan | | 20003 | IBM5550 - Taiwan | | 20004 | TeleText - Taiwan | | 20005 | Wang - Taiwan | | 20105 | IA5 IRV International Alphabet No. 5 (7-bit) | | 20106 | IA5 German (7-bit) | | 20107 | IA5 Swedish (7-bit) | | 20108 | IA5 Norwegian (7-bit) | | 20127 | US-ASCII (7-bit) | | 20261 | T.61 | | 20269 | ISO 6937 Non-Spacing Accent | | 20273 | IBM EBCDIC - Germany | | 20277 | IBM EBCDIC - Denmark/Norway | | 20278 | IBM EBCDIC - Finland/Sweden | | 20280 | IBM EBCDIC - Italy | | 20284 | IBM EBCDIC - Latin America/Spain | | 20285 | IBM EBCDIC - United Kingdom | | 20290 | IBM EBCDIC - Japanese Katakana Extended | | 20297 | IBM EBCDIC - France | | 20420 | IBM EBCDIC - Arabic | | 20423 | IBM EBCDIC - Greek | | 20424 | IBM EBCDIC - Hebrew | | 20833 | IBM EBCDIC - Korean Extended | | 20838 | IBM EBCDIC - Thai | | 20866 | Russian - KOI8-R | | 20871 | IBM EBCDIC - Icelandic | | 20880 | IBM EBCDIC - Cyrillic (Russian) | | 20905 | IBM EBCDIC - Turkish | | 20924 | IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) | | 20932 | JIS X 0208-1990 & 0121-1990 | | 20936 | Simplified Chinese (GB2312) | | 21025 | IBM EBCDIC - Cyrillic (Serbian, Bulgarian) | | 21027 | Extended Alpha Lowercase | | 21866 | Ukrainian (KOI8-U) | | 28591 | ISO 8859-1 Latin I | | 28592 | ISO 8859-2 Central Europe | | 28593 | ISO 8859-3 Latin 3 | | 28594 | ISO 8859-4 Baltic | | 28595 | ISO 8859-5 Cyrillic | | 28596 | ISO 8859-6 Arabic | | 28597 | ISO 8859-7 Greek | | 28598 | ISO 8859-8 Hebrew | | 28599 | ISO 8859-9 Latin 5 | | 28605 | ISO 8859-15 Latin 9 | | 29001 | Europa 3 | | 38598 | ISO 8859-8 Hebrew | | 50220 | ISO 2022 Japanese with no halfwidth Katakana | | 50221 | ISO 2022 Japanese with halfwidth Katakana | | 50222 | ISO 2022 Japanese JIS X 0201-1989 | | 50225 | ISO 2022 Korean | | 50227 | ISO 2022 Simplified Chinese | | 50229 | ISO 2022 Traditional Chinese | | 50930 | Japanese (Katakana) Extended | | 50931 | US/Canada and Japanese | | 50933 | Korean Extended and Korean | | 50935 | Simplified Chinese Extended and Simplified Chinese | | 50936 | Simplified Chinese | | 50937 | US/Canada and Traditional Chinese | | 50939 | Japanese (Latin) Extended and Japanese | | 51932 | EUC - Japanese | | 51936 | EUC - Simplified Chinese | | 51949 | EUC - Korean | | 51950 | EUC - Traditional Chinese | | 52936 | HZ-GB2312 Simplified Chinese | | 54936 | Windows XP: GB18030 Simplified Chinese (4 Byte) | | 57002 | ISCII Devanagari | | 57003 | ISCII Bengali | | 57004 | ISCII Tamil | | 57005 | ISCII Telugu | | 57006 | ISCII Assamese | | 57007 | ISCII Oriya | | 57008 | ISCII Kannada | | 57009 | ISCII Malayalam | | 57010 | ISCII Gujarati | | 57011 | ISCII Punjabi | | 65000 | Unicode UTF-7 | | 65001 | Unicode UTF-8 | The following is a list of valid code page identifiers for Mac OS only: | | | | --- | --- | | Identifier | Name | | 1 | ASCII | | 2 | NEXTSTEP | | 3 | JapaneseEUC | | 4 | UTF8 | | 5 | ISOLatin1 | | 6 | Symbol | | 7 | NonLossyASCII | | 8 | ShiftJIS | | 9 | ISOLatin2 | | 10 | Unicode | | 11 | WindowsCP1251 | | 12 | WindowsCP1252 | | 13 | WindowsCP1253 | | 14 | WindowsCP1254 | | 15 | WindowsCP1250 | | 21 | ISO2022JP | | 30 | MacOSRoman | | 10 | UTF16String | | 0x90000100 | UTF16BigEndian | | 0x94000100 | UTF16LittleEndian | | 0x8c000100 | UTF32String | | 0x98000100 | UTF32BigEndian | | 0x9c000100 | UTF32LittleEndian | | 65536 | Proprietary | **LicenseInfo**: Information about the current license.When queried, this setting will return a string containing information about the license this instance of a class is using. It will return the following information: - Product: The product the license is for. - Product Key: The key the license was generated from. - License Source: Where the license was found (e.g., RuntimeLicense, License File). - License Type: The type of license installed (e.g., Royalty Free, Single Server). - Last Valid Build: The last valid build number for which the license will work. **MaskSensitiveData**: Whether sensitive data is masked in log messages.In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to *true* to mask sensitive data. The default is *true*. **ProcessIdleEvents**: Whether the class uses its internal event loop to process events when the main thread is idle.If set to False, the class will not fire internal idle events. Set this to False to use the class in a background thread on Mac OS. By default, this setting is True. **SelectWaitMillis**: The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.If there are no events to process when DoEvents is called, the class will wait for the amount of time specified here before returning. The default value is 20. **UseInternalSecurityAPI**: Whether or not to use the system security libraries or an internal implementation. When set to *false*, the class will use the system security libraries by default to perform cryptographic functions where applicable. Setting this configuration setting to *true* tells the class to use the internal implementation instead of using the system security libraries. On Windows, this setting is set to *false* by default. On Linux/macOS, this setting is set to *true* by default. To use the system security libraries for Linux, OpenSSL support must be enabled. For more information on how to enable OpenSSL, please refer to the [OpenSSL Notes](platforms.md) section. # Trappable Errors ([SMIME](#smime-class) Class) ## Error Handling (C++) Call the *GetLastErrorCode()* method to obtain the last called method's result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. Known error codes are listed below. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. ### SMIME Errors | | | | --- | --- | | 10191 | Invalid index (RecipientIndex). | | 10192 | Message decoding error (code). | | 10193 | Unexpected message type. | | 10194 | Unsupported hashing/signing algorithm. | | 10195 | The message does not have any signers. | | 10196 | The message signature could not be verified. | | 10197 | Could not locate a suitable decryption certificate. | | 10198 | The signer certificate could not be found. | | 10199 | No signing certificate was supplied for signing the message. | | 10201 | The specified certificate was not the one required. | | 10202 | The specified certificate could not be found. | | 10221 | Could not acquire CSP. | | 10222 | Type validation error. | | 10223 | Unsupported key size. | | 10224 | Unrecognized Content-Type object identifier. | | 10225 | Unrecognized public key format. | | 10226 | No choices specified. | | 10228 | Must specify output stream. | | 10280 | Invalid part index. | | 10281 | Unknown MIME type. | | 10283 | No MIME-boundary found. | | 10280 | Error decoding certificate. |