DCAuth Component
Properties Methods Events Configuration Settings Errors
The DCAuth component represents the private key side of the SecureBlackbox distributed cryptography protocol.
Syntax
TsbxDCAuth
Remarks
The purpose of DCAuth is to sign async requests produced by SignAsyncBegin calls. For each incoming async request containing a document hash, DCAuth produces the corresponding async response containing a signature over that hash.
Protocol Overview
The distributed cryptography protocol involves two principal parties. The signing party, represented by components such as PDFSigner, XAdESSigner, or OfficeSigner, pre-signs documents (such as PDF files), and encapsulates their hashes into what is called an async request. It then communicates the async request to the private key side, where the DCAuth component extracts the hash and signs it with a local private key. DCAuth then encapsulates the signature into an async response, which is sent back to the signing party. The signing party completes the signing operation by extracting the signature from the async response and embedding it into the pre-signed document.
The protocol supports a variety of uses. The scheme above describes the most typical of them, where the signing party is represented by a web application, and the private key side is represented by a workstation. In that particular scenario DC provides a mechanism for the web app to sign documents residing on the web server with private keys residing on the users workstations, perhaps in non-exportable form (e.g. a USB dongle). Other uses include creation of a signing server for a team of driver developers, or an automated signing gateway for outgoing official documents.
In the webapp-to-browser setting the DCAuth control would normally be used within a web server running on the users workstation. That web server would accept async requests from the web page running in the browser, use DCAuth to generate the matching async response, and feed that response back to the web page. The web page will then submit it back to the web server.
Configuring and Using DCAuth
To process an async request, you need to set up a DCAuth object first, and then call its ProcessRequest method:
- Set the KeyId and KeySecret properties so they match the credentials used by the signing party - e.g. those of PDFSigner object:
DCAuth.KeyId = "mykeyid"; DCAuth.KeySecret = "mykeysecret123";These two properties are used to verify the integrity of the incoming async requests. Keep them safe.
- Provide the signing certificate:
DCAuth.SigningCertificate = "C:\Certs\SigningCert.pfx"; DCAuth.CertPassword = "password789";Alternatively, use StorageId to provide a certificate residing elsewhere, such as a PKCS#11 device.
- Assign the async request to the Input property:
DCAuth.Input = Request;Make sure to provide the request in its original XML format. Some technologies and SecureBlackbox code samples may apply additional encoding when conveying async requests from their origin to the DCAuth endpoint. Please double check that you assign the request without any encodings applied. An async request is a properly formed XML document with the root element of SecureBlackboxAsyncState.
- Call the ProcessRequest method:
DCAuth.ProcessRequest;This method performs the actual signing of the hash. Make sure your code is prepared for potential signing errors.
- If the ProcessRequest call has succeeded, grab the async response from the Output property:
Result = DCAuth.Output;
Property List
The following is the full list of the properties of the component with short descriptions. Click on the links for further details.
| CertPassword | Specifies the signing certificate password. |
| ExternalCrypto | Provides access to external signing and DC parameters. |
| FIPSMode | Reserved. |
| Input | Contains the signing request to process. |
| InputEncoding | Specifies request encoding. |
| KeyId | Specifies the KeyID of the pre-shared authentication key. |
| KeySecret | The pre-shared authentication key. |
| Output | Contains the output of the request processing. |
| OutputEncoding | Specifies response encoding. |
| Profile | Specifies a pre-defined profile to apply when creating the signature. |
| SigningCertificate | The certificate to be used for signing. |
| StorageId | Specifies the signing certificate residing in an alternative location. |
Method List
The following is the full list of the methods of the component with short descriptions. Click on the links for further details.
| Config | Sets or retrieves a configuration setting. |
| DoAction | Performs an additional action. |
| ProcessRequest | Processes the request. |
Event List
The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.
| CustomParametersReceived | Passes custom request parameters to the application. |
| Error | Reports information about errors during request processing or signing. |
| ExternalSign | Handles remote or external signing initiated by the SignExternal method or other source. |
| KeySecretNeeded | Requests the key secret from the application. |
| Notification | This event notifies the application about an underlying control flow event. |
| ParameterReceived | Passes a standard request parameter to the user code. |
| PasswordNeeded | Requests a password from the application. |
| SelectCert | Requests certificate selection criteria from the application. |
| SignRequest | This event signifies the processing of an atomic signing request. |
| SignRequestCompleted | This event signifies completion of the processing of an atomic signing request. |
Configuration Settings
The following is a list of configuration settings for the component with short descriptions. Click on the links for further details.
| DataURL | (obsolete) The DataURL parameter to pass to the signer. |
| GoURL | (obsolete) The GoURL parameter to pass to the signer. |
| RequireDefinedSignCert | (obsolete) The RequireDefinedSignCert parameter to pass to the signer. |
| SchemeParams | The algorithm scheme parameters to employ. |
| SessionID | (obsolete) The SessionID parameter to pass to the signer. |
| TokenName | The TokenName parameter to pass to the signer. |
| TokensLibraries | (obsolete) The TokensLibraries parameter to pass to the signer. |
| CheckKeyIntegrityBeforeUse | Enables or disable private key integrity check before use. |
| CookieCaching | Specifies whether a cookie cache should be used for HTTP(S) transports. |
| Cookies | Gets or sets local cookies for the component (supported for HTTPClient, RESTClient and SOAPClient only). |
| DefDeriveKeyIterations | Specifies the default key derivation algorithm iteration count. |
| EnableClientSideSSLFFDHE | Enables or disables finite field DHE key exchange support in TLS clients. |
| GlobalCookies | Gets or sets global cookies for all the HTTP transports. |
| HttpUserAgent | Specifies the user agent name to be used by all HTTP clients. |
| LogDestination | Specifies the debug log destination. |
| LogDetails | Specifies the debug log details to dump. |
| LogFile | Specifies the debug log filename. |
| LogFilters | Specifies the debug log filters. |
| LogFlushMode | Specifies the log flush mode. |
| LogLevel | Specifies the debug log level. |
| LogMaxEventCount | Specifies the maximum number of events to cache before further action is taken. |
| LogRotationMode | Specifies the log rotation mode. |
| MaxASN1BufferLength | Specifies the maximal allowed length for ASN.1 primitive tag data. |
| MaxASN1TreeDepth | Specifies the maximal depth for processed ASN.1 trees. |
| OCSPHashAlgorithm | Specifies the hash algorithm to be used to identify certificates in OCSP requests. |
| Tag | Allows to store any custom data. |
| UseSharedSystemStorages | Specifies whether the validation engine should use a global per-process copy of the system certificate stores. |
| UseSystemOAEPAndPSS | Enforces or disables the use of system-driven RSA OAEP and PSS computations. |
| UseSystemRandom | Enables or disables the use of the OS PRNG. |
CertPassword Property (DCAuth Component)
Specifies the signing certificate password.
Syntax
property CertPassword: String read get_CertPassword write set_CertPassword;
Default Value
''
Remarks
Use this property to provide password for the signing certificate. Alternatively, the password may be provided via the PasswordNeeded event.
ExternalCrypto Property (DCAuth Component)
Provides access to external signing and DC parameters.
Syntax
property ExternalCrypto: TsbxExternalCrypto read get_ExternalCrypto;
Remarks
Use this property to tune-up remote cryptography settings. SecureBlackbox supports two independent types of external cryptography: synchronous (based on OnExternalSign event) and asynchronous (based on DC protocol and DCAuth signing component).
This property is read-only.
FIPSMode Property (DCAuth Component)
Reserved.
Syntax
property FIPSMode: Boolean read get_FIPSMode write set_FIPSMode;
Default Value
false
Remarks
This property is reserved for future use.
Input Property (DCAuth Component)
Contains the signing request to process.
Syntax
property Input: String read get_Input write set_Input;
Default Value
''
Remarks
Assign the request you received from the counterparty to this property before calling the ProcessRequest method. Use Output to read the resulting signature response after ProcessRequest completes.
InputEncoding Property (DCAuth Component)
Specifies request encoding.
Syntax
property InputEncoding: TsbxMessageEncodings read get_InputEncoding write set_InputEncoding;
TsbxMessageEncodings = ( encNone, encAuto, encBase64 );
Default Value
encNone
Remarks
Use this property to specify the encoding to expect the requests to be in.
KeyId Property (DCAuth Component)
Specifies the KeyID of the pre-shared authentication key.
Syntax
property KeyId: String read get_KeyId write set_KeyId;
Default Value
''
Remarks
If processing requests from a single known party, assign the Id of the key you pre-shared with them to this property, and the key itself to the KeySecret property. If you expect to receive requests from many parties with different authentication keys, use KeySecretNeeded event instead.
KeySecret Property (DCAuth Component)
The pre-shared authentication key.
Syntax
property KeySecret: String read get_KeySecret write set_KeySecret;
Default Value
''
Remarks
If processing requests from a single known party, assign the key you pre-shared with them to this property. Use KeyId property to assign the ID of that key. If you expect to receive requests from many parties with different authentication keys, use KeySecretNeeded event instead.
Output Property (DCAuth Component)
Contains the output of the request processing.
Syntax
property Output: String read get_Output;
Default Value
''
Remarks
When ProcessRequest method completes it saves the processing output to this property. The output typically contains the response to be sent back to the requestor.
This property is read-only.
OutputEncoding Property (DCAuth Component)
Specifies response encoding.
Syntax
property OutputEncoding: TsbxMessageEncodings read get_OutputEncoding write set_OutputEncoding;
TsbxMessageEncodings = ( encNone, encAuto, encBase64 );
Default Value
encNone
Remarks
Use this property to specify the encoding you want the response to be produced in.
Profile Property (DCAuth Component)
Specifies a pre-defined profile to apply when creating the signature.
Syntax
property Profile: String read get_Profile write set_Profile;
Default Value
''
Remarks
Advanced signatures come in many variants, which are often defined by parties that needs to process them or by local standards. SecureBlackbox profiles are sets of pre-defined configurations which correspond to particular signature variants. By specifying a profile, you are pre-configuring the component to make it produce the signature that matches the configuration corresponding to that profile.
SigningCertificate Property (DCAuth Component)
The certificate to be used for signing.
Syntax
property SigningCertificate: TsbxCertificate read get_SigningCertificate write set_SigningCertificate;
Remarks
Use this property to specify the certificate that shall be used for signing the data. Note that this certificate should have a private key associated with it. Use SigningChain to supply the rest of the certificate chain for inclusion into the signature.
This property is not available at design time.
StorageId Property (DCAuth Component)
Specifies the signing certificate residing in an alternative location.
Syntax
property StorageId: String read get_StorageId write set_StorageId;
Default Value
''
Remarks
Use this property to specify the signing certificate contained on alternative media, such as a hardware device or in a system certificate store.
Example 1: The certificate resides on a PKCS#11 device
pkcs11://user:pin@/c:/windows/system32/pkcsdriver.dll?slot=0&readonly=1
Example 2: The certificate resides in a system store
system://localmachine@/?store=MY
You can use the following URI modifiers to provide more accurate specifiers for the needed certificate:
- cn: the common name of the certificate subject.
- keyid: the unique identifier included in subject key identifier extension of the certificate.
- keyusage: a comma-separated list of enabled (+) or disabled (-) key usages. The following usages are supported: signature, nonrepudiation, keyencipherment, dataencipherment, keyagreement, keycertsign, crlsign, encipheronly, decipheronly, serverauth, clientauth, codesigning, emailprotection, timestamping, ocspsigning, smartcardlogon, keypurposeclientauth, keypurposekdc.
- fingerprint: the fingerprint of the certificate.
Example 3: selecting the certificate with a given fingerprint:
pkcs11://user:pin@/c:/windows/system32/pkcsdriver.dll?slot=0&readonly=1&fingerprint=001122334455667788aabbccddeeff0011223344
Config Method (DCAuth Component)
Sets or retrieves a configuration setting.
Syntax
function Config(ConfigurationString: String): String;
Remarks
Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.
These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, 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, you must call Config("PROPERTY"). The value will be returned as a string.
DoAction Method (DCAuth Component)
Performs an additional action.
Syntax
function DoAction(ActionID: String; ActionParams: String): String;
Remarks
DoAction is a generic method available in every component. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.
The unique identifier of the action is provided in ActionID parameter. ActionParams contains a list of parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....
ProcessRequest Method (DCAuth Component)
Processes the request.
Syntax
procedure ProcessRequest();
Remarks
Use this method to process the request, sign the hashes, and produce the response. This is the main method of the class. Note that a single request received from the counterparty may contain more than one signature request. This method processes them all, reporting each atomic signature request with SignRequest and SignRequestCompleted events. Before calling this method, make sure you assign the request content to Input. Upon completion, read the response (containing all the signatures) from Output property.
CustomParametersReceived Event (DCAuth Component)
Passes custom request parameters to the application.
Syntax
type TCustomParametersReceivedEvent = procedure ( Sender: TObject; const Value: String ) of Object;
property OnCustomParametersReceived: TCustomParametersReceivedEvent read FOnCustomParametersReceived write FOnCustomParametersReceived;
Remarks
Subscribe to this event to access custom signing parameters supplied by the signer in their request. The Value string contains the parameters as included by the requestor.
Error Event (DCAuth Component)
Reports information about errors during request processing or signing.
Syntax
type TErrorEvent = procedure ( Sender: TObject; ErrorCode: Integer; const Description: String ) of Object;
property OnError: TErrorEvent read FOnError write FOnError;
Remarks
The event is fired if an error occurs during the request processing. Use the ErrorCode and Description parameters to get the details.
ExternalSign Event (DCAuth Component)
Handles remote or external signing initiated by the SignExternal method or other source.
Syntax
type TExternalSignEvent = procedure ( Sender: TObject; const OperationId: String; const HashAlgorithm: String; const Pars: String; const Data: String; var SignedData: String ) of Object;
property OnExternalSign: TExternalSignEvent read FOnExternalSign write FOnExternalSign;
Remarks
Assign a handler to this event if you need to delegate a low-level signing operation to an external, remote, or custom signing engine. Depending on the settings, the handler will receive a hashed or unhashed value to be signed.
The event handler must pass the value of Data to the signer, obtain the signature, and pass it back to the component via SignedData parameter.
OperationId provides a comment about the operation and its origin. It depends on the exact component being used, and may be empty. HashAlgorithm specifies the hash algorithm being used for the operation, and Pars contain algorithm-dependent parameters.
The component uses base16 (hex) encoding for Data, SignedData, and Pars parameters. If your signing engine uses a different input and output encoding, you may need to decode and/or encode the data before and/or after the signing.
A sample MD5 hash encoded in base16: a0dee2a0382afbb09120ffa7ccd8a152 - lower case base16 A0DEE2A0382AFBB09120FFA7CCD8A152 - upper case base16
A sample event handler that uses a .NET RSACryptoServiceProvider class may look like the following:
signer.OnExternalSign += (s, e) =>
{
var cert = new X509Certificate2("cert.pfx", "", X509KeyStorageFlags.Exportable);
var key = (RSACryptoServiceProvider)cert.PrivateKey;
var dataToSign = e.Data.FromBase16String();
var signedData = key.SignHash(dataToSign, "2.16.840.1.101.3.4.2.1");
e.SignedData = signedData.ToBase16String();
};
KeySecretNeeded Event (DCAuth Component)
Requests the key secret from the application.
Syntax
type TKeySecretNeededEvent = procedure ( Sender: TObject; const KeyId: String; var KeySecret: String ) of Object;
property OnKeySecretNeeded: TKeySecretNeededEvent read FOnKeySecretNeeded write FOnKeySecretNeeded;
Remarks
Subscribe to this event to pass the key secret (a pre-shared request authentication code) to the signing component when it is needed. The authentication combination consists of the KeyId, a non-secret unique key identifier, and the KeySecret, shared by the parties, which should be kept private. This event is an alternative for KeySecret property. Use it when you expect to process requests from requestors with different KeyIds and secrets. If you only expect to receive requests from a single requestor with a known KeyId, providing the key secret via KeyId and KeySecret properties would be an easier route.
Notification Event (DCAuth Component)
This event notifies the application about an underlying control flow event.
Syntax
type TNotificationEvent = procedure ( Sender: TObject; const EventID: String; const EventParam: String ) of Object;
property OnNotification: TNotificationEvent read FOnNotification write FOnNotification;
Remarks
The component fires this event to let the application know about some event, occurrence, or milestone in the component. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.
The unique identifier of the event is provided in EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the component, the exact action it is performing, or the document being processed, one or both may be omitted.
ParameterReceived Event (DCAuth Component)
Passes a standard request parameter to the user code.
Syntax
type TParameterReceivedEvent = procedure ( Sender: TObject; const Name: String; const Value: String ) of Object;
property OnParameterReceived: TParameterReceivedEvent read FOnParameterReceived write FOnParameterReceived;
Remarks
This event is fired when one of 'standard' protocol parameters has been found in the request: - SessionID - DataURL - GoURL - Token - PKCS11Libraries - AllowFileStorage - AllowTokenStorage - AllowWindowsStorage - AllowOSStorage Parameters are reported one-by-one upon being processed.
PasswordNeeded Event (DCAuth Component)
Requests a password from the application.
Syntax
type TPasswordNeededEvent = procedure ( Sender: TObject; const NeededFor: String; const Id: String; var Password: String; var Cancel: Boolean ) of Object;
property OnPasswordNeeded: TPasswordNeededEvent read FOnPasswordNeeded write FOnPasswordNeeded;
Remarks
Subscribe to this event to pass a password to the server component. The NeededFor parameter specifies the entity a password for which is being requested (which is typically a certificate). The Id parameter provides the entity's identifier, such as a path to the certificate being loaded. When handling this event, assign the Password to the valid password if you have it; otherwise, set Cancel to true to abort the operation.
SelectCert Event (DCAuth Component)
Requests certificate selection criteria from the application.
Syntax
type TSelectCertEvent = procedure ( Sender: TObject; var CommonName: String; var KeyID: String; var KeyUsage: String; var Fingerprint: String; var StoreType: String ) of Object;
property OnSelectCert: TSelectCertEvent read FOnSelectCert write FOnSelectCert;
Remarks
Subscribe to this event to provide signing certificate details on the fly, right before the hash is signed.
SignRequest Event (DCAuth Component)
This event signifies the processing of an atomic signing request.
Syntax
type TSignRequestEvent = procedure ( Sender: TObject; Hash: String; HashB: TBytes; const Username: String; var Allow: Boolean ) of Object;
property OnSignRequest: TSignRequestEvent read FOnSignRequest write FOnSignRequest;
Remarks
Subscribe to this event to be notified of every signature request processed by the DC server. Note that any one request coming from the requestor may contain multiple individual signature requests (so-called 'batching'). This event is a good mechanism to track signature requests for accountability purposes, and provide basic access control over the signing operations. The Hash parameter contains the hash that is going to be signed. Username contains the HTTP user name of the connected user. Set Allow to false to stop the request from being served. Use the SignRequestCompleted event to track completion of the initiated operation.
SignRequestCompleted Event (DCAuth Component)
This event signifies completion of the processing of an atomic signing request.
Syntax
type TSignRequestCompletedEvent = procedure ( Sender: TObject; Hash: String; HashB: TBytes; const Username: String; Signature: String; SignatureB: TBytes ) of Object;
property OnSignRequestCompleted: TSignRequestCompletedEvent read FOnSignRequestCompleted write FOnSignRequestCompleted;
Remarks
Use this event to track completion of signing request processing. The Hash parameter contains the hash that is signed, as supplied by the requestor, and the Signature parameter contains the resulting cryptographic signature. The Username parameter matches the parameter in SignRequest event.
Certificate Type
Provides details of an individual X.509 certificate.
Remarks
This type provides access to X.509 certificate details.
Fields
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Bytes TBytes |
Returns raw certificate data in DER format. |
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CA Boolean |
Indicates whether the certificate has a CA capability (a setting in BasicConstraints extension). |
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CAKeyID TBytes |
A unique identifier (fingerprint) of the CA certificate's private key. Authority Key Identifier is a (non-critical) X.509 certificate extension which allows the identification of certificates produced by the same issuer, but with different public keys. |
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CRLDistributionPoints String |
Locations of the CRL (Certificate Revocation List) distribution points used to check this certificate's validity. |
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Curve String |
Specifies the elliptic curve of the EC public key.
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Fingerprint TBytes |
Contains the fingerprint (a hash imprint) of this certificate. |
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FriendlyName String |
Contains an associated alias (friendly name) of the certificate. |
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Handle Int64 |
Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise. When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object
after such operation.
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HashAlgorithm String |
Specifies the hash algorithm to be used in the operations on the certificate (such as key signing)
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Issuer String |
The common name of the certificate issuer (CA), typically a company name. |
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IssuerRDN String |
A collection of information, in the form of [OID, Value] pairs, uniquely identifying the certificate issuer. |
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KeyAlgorithm String |
Specifies the public key algorithm of this certificate.
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KeyBits Integer |
Returns the length of the public key. |
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KeyFingerprint TBytes |
Returns a fingerprint of the public key contained in the certificate. |
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KeyUsage Integer |
Indicates the purposes of the key contained in the certificate, in the form of an OR'ed flag set. This value is a bit mask of the following values:
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KeyValid Boolean |
Returns True if the certificate's key is cryptographically valid, and False otherwise. |
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OCSPLocations String |
Locations of OCSP (Online Certificate Status Protocol) services that can be used to check this certificate's validity, as recorded by the CA. |
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OCSPNoCheck Boolean |
TBD. |
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Origin Integer |
Returns the origin of this certificate. |
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PolicyIDs String |
Contains identifiers (OIDs) of the applicable certificate policies. The Certificate Policies extension identifies a sequence of policies under which the certificate has been issued, and which regulate its usage. |
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PrivateKeyBytes TBytes |
Contains the certificate's private key. It is normal for this property to be empty if the private key is non-exportable. |
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PrivateKeyExists Boolean |
Indicates whether the certificate has an associated private key. |
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PrivateKeyExtractable Boolean |
Indicates whether the private key is extractable |
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PublicKeyBytes TBytes |
Contains the certificate's public key in DER format. |
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QualifiedStatements TsbxQualifiedStatementsTypes |
TBD |
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SelfSigned Boolean |
Indicates whether the certificate is self-signed (root) or signed by an external CA. |
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SerialNumber TBytes |
Returns the certificate's serial number. |
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SigAlgorithm String |
Indicates the algorithm that was used by the CA to sign this certificate. |
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Subject String |
The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name. |
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SubjectAlternativeName String |
TBD. |
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SubjectKeyID TBytes |
Contains a unique identifier (fingerprint) of the certificate's private key. Subject Key Identifier is a (non-critical) X.509 certificate extension which allows the identification of certificates containing a particular public key. In SecureBlackbox, the unique identifier is represented with a SHA1 hash of the bit string of the subject public key. |
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SubjectRDN String |
A collection of information, in the form of [OID, Value] pairs, uniquely identifying the certificate holder (subject). |
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ValidFrom String |
The time point at which the certificate becomes valid, in UTC. |
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ValidTo String |
The time point at which the certificate expires, in UTC. |
Constructors
>
constructor Create();
Creates a new object with default field values.
ExternalCrypto Type
Specifies the parameters of external cryptographic calls.
Remarks
External cryptocalls are used in a Distributed Cryptography (DC) subsystem, which allows the delegation of security operations to the remote agent. For instance, it can be used to compute the signature value on the server, while retaining the client's private key locally.
Fields
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AsyncDocumentID String |
Specifies the document ID for SignAsyncEnd() call Use this property when working with multi-signature DCAuth requests and responses to uniquely identify documents signed within a larger batch. This value helps ASiCSigner identify the correct signature in the returned batch of responses. If using batched requests, make sure to set this property to the same value on both pre-signing (SignAsyncBegin) and completion (SignAsyncEnd) stages. |
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CustomParams String |
Custom parameters to be passed to the signing service (uninterpreted). |
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Data String |
Additional data to be included in the async state and mirrored back by the requestor |
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ExternalHashCalculation Boolean |
Specifies whether the message hash is to be calculated at the external endpoint. Please note that this mode is not supported by all components. In particular, components operating with larger objects (PDFSigner, CAdESSigner, XAdESSigner) do not support it. |
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HashAlgorithm String |
Specifies the request's signature hash algorithm.
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KeyID String |
The ID of the pre-shared key used for DC request authentication. Asynchronous DCAuth-driven communication requires that parties authenticate each other with a secret pre-shared cryptographic key. This provides extra protection layer for the protocol and diminishes the risk of private key becoming abused by foreign parties. Use this property to provide the pre-shared key identifier, and use KeySecret to pass the key itself. The same KeyID/KeySecret pair should be used on the DCAuth side for the signing requests to be accepted. Note: The KeyID/KeySecret scheme is very similar to the AuthKey scheme used in various Cloud service providers to authenticate users. Example:
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KeySecret String |
The pre-shared key used for DC request authentication. This key must be set and match the key used by the DCAuth counterpart for the scheme to work. Read more about configuring authentication in the KeyID topic. |
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Method TsbxAsyncSignMethods |
Specifies the asynchronous signing method. This is typically defined by the DC server capabilities and setup. Available options:
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Mode TsbxExternalCryptoModes |
Specifies the external cryptography mode. Available options:
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PublicKeyAlgorithm String |
Provide public key algorithm here if the certificate is not available on the pre-signing stage.
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Constructors
>
constructor Create();
Creates a new ExternalCrypto object with default field values.
Configuration Settings (DCAuth Component)
The component 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 component, access to these internal properties is provided through the Config method.DCAuth Configuration Settings | ||||||||||||||||||||||||||||||
| DataURL: (obsolete) The DataURL parameter to pass to the signer.(obsolete) The DataURL parameter to pass to the signer. | ||||||||||||||||||||||||||||||
| GoURL: (obsolete) The GoURL parameter to pass to the signer.(obsolete) The GoURL parameter to pass to the signer. | ||||||||||||||||||||||||||||||
| RequireDefinedSignCert: (obsolete) The RequireDefinedSignCert parameter to pass to the signer.(obsolete) The RequireDefinedSignCert parameter to pass to the signer. | ||||||||||||||||||||||||||||||
| SchemeParams:
The algorithm scheme parameters to employ.Use this property to specify the parameters of the algorithm scheme if needed.
TBD |
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| SessionID: (obsolete) The SessionID parameter to pass to the signer.(obsolete) The SessionID parameter to pass to the signer. | ||||||||||||||||||||||||||||||
| TokenName: The TokenName parameter to pass to the signer.(obsolete) The TokenName parameter to pass to the signer. | ||||||||||||||||||||||||||||||
| TokensLibraries: (obsolete) The TokensLibraries parameter to pass to the signer.(obsolete) The TokensLibraries parameter to pass to the signer. | ||||||||||||||||||||||||||||||
Base Configuration Settings | ||||||||||||||||||||||||||||||
| CheckKeyIntegrityBeforeUse:
Enables or disable private key integrity check before use.This global property enables or disables private key material check before each signing operation. This slows down performance a bit,
but prevents a selection of attacks on RSA keys where keys with unknown origins are used.
You can switch this property off to improve performance if your project only uses known, good private keys. |
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| CookieCaching:
Specifies whether a cookie cache should be used for HTTP(S) transports.Set this property to enable or disable cookies caching for the component.
Supported values are:
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| Cookies: Gets or sets local cookies for the component (supported for HTTPClient, RESTClient and SOAPClient only).Use this property to get cookies from the internal cookie storage of the component and/or restore them back between application sessions. | ||||||||||||||||||||||||||||||
| DefDeriveKeyIterations: Specifies the default key derivation algorithm iteration count.This global property sets the default number of iterations for all supported key derivation algorithms. Note that you can provide the required number of iterations by using properties of the relevant key generation component; this global setting is used in scenarios where specific iteration count is not or cannot be provided. | ||||||||||||||||||||||||||||||
| EnableClientSideSSLFFDHE:
Enables or disables finite field DHE key exchange support in TLS clients.This global property enables or disables support for finite field DHE key exchange methods in TLS clients. FF DHE is a slower
algorithm if compared to EC DHE; enabling it may result in slower connections.
This setting only applies to sessions negotiated with TLS version 1.3. |
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| GlobalCookies: Gets or sets global cookies for all the HTTP transports.Use this property to get cookies from the GLOBAL cookie storage or restore them back between application sessions. These cookies will be used by all the components that have its CookieCaching property set to "global". | ||||||||||||||||||||||||||||||
| HttpUserAgent: Specifies the user agent name to be used by all HTTP clients.This global setting defines the User-Agent field of the HTTP request provides information about the software that initiates the request. This value will be used by all the HTTP clients including the ones used internally in other components. | ||||||||||||||||||||||||||||||
| LogDestination:
Specifies the debug log destination.Contains a comma-separated list of values that specifies where debug log should be dumped.
Supported values are:
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| LogDetails:
Specifies the debug log details to dump.Contains a comma-separated list of values that specifies which debug log details to dump.
Supported values are:
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| LogFile: Specifies the debug log filename.Use this property to provide a path to the log file. | ||||||||||||||||||||||||||||||
| LogFilters:
Specifies the debug log filters.Contains a comma-separated list of value pairs ("name:value") that describe filters.
Supported filter names are:
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LogFlushMode:
Specifies the log flush mode.Use this property to set the log flush mode. The following values are defined:
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| LogLevel:
Specifies the debug log level.Use this property to provide the desired debug log level.
Supported values are:
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| LogMaxEventCount:
Specifies the maximum number of events to cache before further action is taken.Use this property to specify the log event number threshold. This threshold may have different effects,
depending on the rotation setting and/or the flush mode.
The default value of this setting is 100. |
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LogRotationMode:
Specifies the log rotation mode.Use this property to set the log rotation mode. The following values are defined:
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| MaxASN1BufferLength: Specifies the maximal allowed length for ASN.1 primitive tag data.This global property limits the maximal allowed length for ASN.1 tag data for non-content-carrying structures, such as certificates, CRLs, or timestamps. It does not affect structures that can carry content, such as CMS/CAdES messages. This is a security property aiming at preventing DoS attacks. | ||||||||||||||||||||||||||||||
| MaxASN1TreeDepth: Specifies the maximal depth for processed ASN.1 trees.This global property limits the maximal depth of ASN.1 trees that the component can handle without throwing an error. This is a security property aiming at preventing DoS attacks. | ||||||||||||||||||||||||||||||
| OCSPHashAlgorithm: Specifies the hash algorithm to be used to identify certificates in OCSP requests.This global setting defines the hash algorithm to use in OCSP requests during chain validation. Some OCSP responders can only use older algorithms, in which case setting this property to SHA1 may be helpful. | ||||||||||||||||||||||||||||||
| Tag: Allows to store any custom data.Use this config property to store any custom data. | ||||||||||||||||||||||||||||||
| UseSharedSystemStorages: Specifies whether the validation engine should use a global per-process copy of the system certificate stores.Set this global property to false to make each validation run use its own copy of system certificate stores. | ||||||||||||||||||||||||||||||
| UseSystemOAEPAndPSS:
Enforces or disables the use of system-driven RSA OAEP and PSS computations.This global setting defines who is responsible for performing RSA-OAEP and RSA-PSS computations where the private key is stored in a Windows system store and is exportable.
If set to true, SBB will delegate the computations to Windows via a CryptoAPI call. Otherwise, it will export the key material and perform the computations
using its own OAEP/PSS implementation.
This setting only applies to certificates originating from a Windows system store. |
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| UseSystemRandom: Enables or disables the use of the OS PRNG.Use this global property to enable or disable the use of operating system-driven pseudorandom number generation. |