CryptoKeyManager Class

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The CryptoKeyManager class provides a simple way to load, generate and manage generic crypto keys.

Syntax

class secureblackbox.CryptoKeyManager

Remarks

CryptoKeyManager allows you to load, save, generate, import, and export low-level crypto keys. One example of such keys are raw RSA keys stored in PKCS1 format or AES256 keys. CryptoKeyManager supports asymmetric, symmetric, and HMAC keys.

CryptoKeyManager is a typical companion for low-level cryptography classes, such as PublicKeyCrypto, SymmetricCrypto, and HashFunction. It can also be used to provide external key material to certificate objects, and to derive cryptographic keys from passwords.

Use import_bytes or import_from_file method to load the key material from a buffer or file. Use import_from_cert (and remember to assign the certificate object to the certificate property before calling it) to import a key from an X.509 certificate. Once loaded, the key will be available in the key property.

To generate a new key or keypair use generate method. You can export the generated key using export_bytes or export_to_file method. You can attach the generated or loaded key to an external certificate object using the export_to_cert method.

Note: CryptoKeyManager can only work with one cryptographic key at a time. Use CryptoKeyStorage to access media containing more than one key.

Property List

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The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

Method List

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The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

Event List

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The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

Config Settings

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The following is a list of config settings for the class with short descriptions. Click on the links for further details.

cert_bytes Property

Returns the raw certificate data in DER format.

Syntax

def get_cert_bytes() -> bytes: ...

cert_bytes = property(get_cert_bytes, None)

Remarks

Returns the raw certificate data in DER format.

This property is read-only.

cert_ca Property

Indicates whether the certificate has a CA capability.

Syntax

def get_cert_ca() -> bool: ...
def set_cert_ca(value: bool) -> None: ...

cert_ca = property(get_cert_ca, set_cert_ca)

Default Value

FALSE

Remarks

Indicates whether the certificate has a CA capability. For the certificate to be considered a CA, it must have its Basic Constraints extension set with the CA indicator enabled.

Set this property when generating a new certificate to have its Basic Constraints extension generated automatically.

cert_ca_key_id Property

A unique identifier (fingerprint) of the CA certificate's cryptographic key.

Syntax

def get_cert_ca_key_id() -> bytes: ...

cert_ca_key_id = property(get_cert_ca_key_id, None)

Remarks

A unique identifier (fingerprint) of the CA certificate's cryptographic key.

Authority Key Identifier is a certificate extension which allows identification of certificates belonging to the same issuer, but with different public keys. It is a de-facto standard to include this extension in all certificates to facilitate chain building.

This setting cannot be set when generating a certificate as it always derives from another certificate property. CertificateManager generates this setting automatically if enough information is available to it: for self-signed certificates, this value is copied from the cert_subject_key_id setting, and for lower-level certificates, from the parent certificate's subject key ID extension.

This property is read-only.

cert_cert_type Property

Returns the type of the entity contained in the Certificate object.

Syntax

def get_cert_cert_type() -> int: ...

cert_cert_type = property(get_cert_cert_type, None)

Default Value

0

Remarks

Returns the type of the entity contained in the Certificate object.

A Certificate object can contain two types of cryptographic objects: a ready-to-use X.509 certificate, or a certificate request ("an unsigned certificate"). Certificate requests can be upgraded to full certificates by signing them with a CA certificate.

Use the CertificateManager class to load or create new certificate and certificate requests objects.

This property is read-only.

cert_crl_distribution_points Property

Contains a list of locations of CRL distribution points used to check this certificate's validity.

Syntax

def get_cert_crl_distribution_points() -> str: ...
def set_cert_crl_distribution_points(value: str) -> None: ...

cert_crl_distribution_points = property(get_cert_crl_distribution_points, set_cert_crl_distribution_points)

Default Value

""

Remarks

Contains a list of locations of CRL distribution points used to check this certificate's validity. The list is taken from the respective certificate extension.

Use this property when generating a certificate to provide a list of CRL endpoints that should be made part of the new certificate.

The endpoints are provided as a list of CRLF-separated URLs. Note that this differs from the behaviour used in earlier product versions, where the "|" character was used as the location separator.

cert_curve Property

Specifies the elliptic curve associated with the certificate's public key.

Syntax

def get_cert_curve() -> str: ...
def set_cert_curve(value: str) -> None: ...

cert_curve = property(get_cert_curve, set_cert_curve)

Default Value

""

Remarks

Specifies the elliptic curve associated with the certificate's public key. This setting only applies to certificates containing EC keys.

cert_fingerprint Property

Contains the fingerprint (a hash imprint) of this certificate.

Syntax

def get_cert_fingerprint() -> str: ...

cert_fingerprint = property(get_cert_fingerprint, None)

Default Value

""

Remarks

Contains the fingerprint (a hash imprint) of this certificate.

While there is no formal standard defining what a fingerprint is, a SHA1 hash of the certificate's DER-encoded body is typically used.

This property is read-only.

cert_friendly_name Property

Contains an associated alias (friendly name) of the certificate.

Syntax

def get_cert_friendly_name() -> str: ...

cert_friendly_name = property(get_cert_friendly_name, None)

Default Value

""

Remarks

Contains an associated alias (friendly name) of the certificate. The friendly name is not a property of a certificate: it is maintained by the certificate media rather than being included in its DER representation. Windows certificate stores are one example of media that does support friendly names.

This property is read-only.

cert_handle Property

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

def get_cert_handle() -> int: ...
def set_cert_handle(value: int) -> None: ...

cert_handle = property(get_cert_handle, set_cert_handle)

Default Value

0

Remarks

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. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

cert_hash_algorithm Property

Provides means to set the hash algorithm to be used in the subsequent operation on the certificate (such as generation or key signing).

Syntax

def get_cert_hash_algorithm() -> str: ...
def set_cert_hash_algorithm(value: str) -> None: ...

cert_hash_algorithm = property(get_cert_hash_algorithm, set_cert_hash_algorithm)

Default Value

""

Remarks

Provides means to set the hash algorithm to be used in the subsequent operation on the certificate (such as generation or key signing). It is not a property of a certificate; use cert_sig_algorithm to find out the hash algorithm that is part of the certificate signature.

cert_issuer Property

The common name of the certificate issuer (CA), typically a company name.

Syntax

def get_cert_issuer() -> str: ...

cert_issuer = property(get_cert_issuer, None)

Default Value

""

Remarks

The common name of the certificate issuer (CA), typically a company name. This is part of a larger set of credentials available via cert_issuer_rdn.

This property is read-only.

cert_issuer_rdn Property

A list of Property=Value pairs that uniquely identify the certificate issuer.

Syntax

def get_cert_issuer_rdn() -> str: ...
def set_cert_issuer_rdn(value: str) -> None: ...

cert_issuer_rdn = property(get_cert_issuer_rdn, set_cert_issuer_rdn)

Default Value

""

Remarks

A list of Property=Value pairs that uniquely identify the certificate issuer.

Example: /C=US/O=Nationwide CA/CN=Web Certification Authority

cert_key_algorithm Property

Specifies the public key algorithm of this certificate.

Syntax

def get_cert_key_algorithm() -> str: ...
def set_cert_key_algorithm(value: str) -> None: ...

cert_key_algorithm = property(get_cert_key_algorithm, set_cert_key_algorithm)

Default Value

"0"

Remarks

Specifies the public key algorithm of this certificate.

Use the cert_key_bits, cert_curve, and cert_public_key_bytes properties to get more details about the key the certificate contains.

cert_key_bits Property

Returns the length of the public key in bits.

Syntax

def get_cert_key_bits() -> int: ...

cert_key_bits = property(get_cert_key_bits, None)

Default Value

0

Remarks

Returns the length of the public key in bits.

This value indicates the length of the principal cryptographic parameter of the key, such as the length of the RSA modulus or ECDSA field. The key data returned by the cert_public_key_bytes or cert_private_key_bytes property would typically contain auxiliary values, and therefore be longer.

This property is read-only.

cert_key_fingerprint Property

Returns a SHA1 fingerprint of the public key contained in the certificate.

Syntax

def get_cert_key_fingerprint() -> str: ...

cert_key_fingerprint = property(get_cert_key_fingerprint, None)

Default Value

""

Remarks

Returns a SHA1 fingerprint of the public key contained in the certificate.

Note that the key fingerprint is different from the certificate fingerprint accessible via the cert_fingerprint property. The key fingeprint uniquely identifies the public key, and so can be the same for multiple certificates containing the same key.

This property is read-only.

cert_key_usage Property

Indicates the purposes of the key contained in the certificate, in the form of an OR'ed flag set.

Syntax

def get_cert_key_usage() -> int: ...
def set_cert_key_usage(value: int) -> None: ...

cert_key_usage = property(get_cert_key_usage, set_cert_key_usage)

Default Value

0

Remarks

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:

Set this property before generating the certificate to propagate the key usage flags to the new certificate.

cert_key_valid Property

Returns True if the certificate's key is cryptographically valid, and False otherwise.

Syntax

def get_cert_key_valid() -> bool: ...

cert_key_valid = property(get_cert_key_valid, None)

Default Value

FALSE

Remarks

Returns True if the certificate's key is cryptographically valid, and False otherwise.

This property is read-only.

cert_ocsp_locations Property

Locations of OCSP services that can be used to check this certificate's validity in real time, as recorded by the CA.

Syntax

def get_cert_ocsp_locations() -> str: ...
def set_cert_ocsp_locations(value: str) -> None: ...

cert_ocsp_locations = property(get_cert_ocsp_locations, set_cert_ocsp_locations)

Default Value

""

Remarks

Locations of OCSP services that can be used to check this certificate's validity in real time, as recorded by the CA.

Set this property before calling the certificate manager's generate method to propagate it to the new certificate.

The OCSP locations are provided as a list of CRLF-separated URLs. Note that this differs from the behaviour used in earlier product versions, where the "|" character was used as the location separator.

cert_ocsp_no_check Property

Accessor to the value of the certificate's ocsp-no-check extension.

Syntax

def get_cert_ocsp_no_check() -> bool: ...
def set_cert_ocsp_no_check(value: bool) -> None: ...

cert_ocsp_no_check = property(get_cert_ocsp_no_check, set_cert_ocsp_no_check)

Default Value

FALSE

Remarks

Accessor to the value of the certificate's ocsp-no-check extension.

cert_origin Property

Returns the location that the certificate was taken or loaded from.

Syntax

def get_cert_origin() -> int: ...

cert_origin = property(get_cert_origin, None)

Default Value

0

Remarks

Returns the location that the certificate was taken or loaded from.

This property is read-only.

cert_policy_i_ds Property

Contains identifiers (OIDs) of the applicable certificate policies.

Syntax

def get_cert_policy_i_ds() -> str: ...
def set_cert_policy_i_ds(value: str) -> None: ...

cert_policy_i_ds = property(get_cert_policy_i_ds, set_cert_policy_i_ds)

Default Value

""

Remarks

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.

Set this property when generating a certificate to propagate the policies information to the new certificate.

The policies are provided as a list of CRLF-separated entries. Note that this differs from the behaviour used in earlier product versions, where the "|" character was used as the policy element separator.

cert_private_key_bytes Property

Returns the certificate's private key in DER-encoded format.

Syntax

def get_cert_private_key_bytes() -> bytes: ...

cert_private_key_bytes = property(get_cert_private_key_bytes, None)

Remarks

Returns the certificate's private key in DER-encoded format. It is normal for this property to be empty if the private key is non-exportable, which, for example, is typical for certificates originating from hardware security devices.

This property is read-only.

cert_private_key_exists Property

Indicates whether the certificate has a usable private key associated with it.

Syntax

def get_cert_private_key_exists() -> bool: ...

cert_private_key_exists = property(get_cert_private_key_exists, None)

Default Value

FALSE

Remarks

Indicates whether the certificate has a usable private key associated with it. If it is set to True, the certificate can be used for private key operations, such as signing or decryption.

This property is independent from cert_private_key_bytes, and can be set to True even if the former is empty. This would imply that the private key is non-exportable, but still can be used for cryptographic operations.

This property is read-only.

cert_private_key_extractable Property

Indicates whether the private key is extractable (exportable).

Syntax

def get_cert_private_key_extractable() -> bool: ...

cert_private_key_extractable = property(get_cert_private_key_extractable, None)

Default Value

FALSE

Remarks

Indicates whether the private key is extractable (exportable).

This property is read-only.

cert_public_key_bytes Property

Contains the certificate's public key in DER format.

Syntax

def get_cert_public_key_bytes() -> bytes: ...

cert_public_key_bytes = property(get_cert_public_key_bytes, None)

Remarks

Contains the certificate's public key in DER format.

This typically would contain an ASN.1-encoded public key value. The exact format depends on the type of the public key contained in the certificate.

This property is read-only.

cert_qualified Property

Indicates whether the certificate is qualified.

Syntax

def get_cert_qualified() -> bool: ...

cert_qualified = property(get_cert_qualified, None)

Default Value

FALSE

Remarks

Indicates whether the certificate is qualified.

This property is set to True if the certificate is confirmed by a Trusted List to be qualified.

This property is read-only.

cert_qualified_statements Property

Returns a simplified qualified status of the certificate.

Syntax

def get_cert_qualified_statements() -> int: ...
def set_cert_qualified_statements(value: int) -> None: ...

cert_qualified_statements = property(get_cert_qualified_statements, set_cert_qualified_statements)

Default Value

0

Remarks

Returns a simplified qualified status of the certificate.

cert_qualifiers Property

A list of qualifiers.

Syntax

def get_cert_qualifiers() -> str: ...

cert_qualifiers = property(get_cert_qualifiers, None)

Default Value

""

Remarks

A list of qualifiers.

Contains a comma-separated list of qualifier aliases for the certificate, for example QCP-n-qscd,QCWithSSCD.

This property is read-only.

cert_self_signed Property

Indicates whether the certificate is self-signed (root) or signed by an external CA.

Syntax

def get_cert_self_signed() -> bool: ...

cert_self_signed = property(get_cert_self_signed, None)

Default Value

FALSE

Remarks

Indicates whether the certificate is self-signed (root) or signed by an external CA.

This property is read-only.

cert_serial_number Property

Returns the certificate's serial number.

Syntax

def get_cert_serial_number() -> bytes: ...
def set_cert_serial_number(value: bytes) -> None: ...

cert_serial_number = property(get_cert_serial_number, set_cert_serial_number)

Remarks

Returns the certificate's serial number.

The serial number is a binary string that uniquely identifies a certificate among others issued by the same CA. According to the X.509 standard, the (issuer, serial number) pair should be globally unique to facilitate chain building.

cert_sig_algorithm Property

Indicates the algorithm that was used by the CA to sign this certificate.

Syntax

def get_cert_sig_algorithm() -> str: ...

cert_sig_algorithm = property(get_cert_sig_algorithm, None)

Default Value

""

Remarks

Indicates the algorithm that was used by the CA to sign this certificate.

A signature algorithm typically combines hash and public key algorithms together, such as sha256WithRSAEncryption or ecdsa-with-SHA256.

This property is read-only.

cert_source Property

Returns the source (location or disposition) of a cryptographic primitive entity, such as a certificate, CRL, or OCSP response.

Syntax

def get_cert_source() -> int: ...

cert_source = property(get_cert_source, None)

Default Value

0

Remarks

Returns the source (location or disposition) of a cryptographic primitive entity, such as a certificate, CRL, or OCSP response.

This property is read-only.

cert_subject Property

The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name.

Syntax

def get_cert_subject() -> str: ...

cert_subject = property(get_cert_subject, None)

Default Value

""

Remarks

The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name. This is part of a larger set of credentials available via cert_subject_rdn.

This property is read-only.

cert_subject_alternative_name Property

Returns or sets the value of the Subject Alternative Name extension of the certificate.

Syntax

def get_cert_subject_alternative_name() -> str: ...
def set_cert_subject_alternative_name(value: str) -> None: ...

cert_subject_alternative_name = property(get_cert_subject_alternative_name, set_cert_subject_alternative_name)

Default Value

""

Remarks

Returns or sets the value of the Subject Alternative Name extension of the certificate.

Subject alternative names are used to provide additional names that are impractical to store in the main cert_subject_rdn field. For example, it is often used to store all the domain names that a TLS certificate is authorized to protect.

The alternative names are provided as a list of CRLF-separated entries. Note that this differs from the behaviour used in earlier product versions, where the "|" character was used as the element separator.

cert_subject_key_id Property

Contains a unique identifier of the certificate's cryptographic key.

Syntax

def get_cert_subject_key_id() -> bytes: ...
def set_cert_subject_key_id(value: bytes) -> None: ...

cert_subject_key_id = property(get_cert_subject_key_id, set_cert_subject_key_id)

Remarks

Contains a unique identifier of the certificate's cryptographic key.

Subject Key Identifier is a certificate extension which allows a specific public key to be associated with a certificate holder. Typically, subject key identifiers of CA certificates are recorded as respective CA key identifiers in the subordinate certificates that they issue, which facilitates chain building.

The cert_subject_key_id and cert_ca_key_id properties of self-signed certificates typically contain identical values, as in that specific case, the issuer and the subject are the same entity.

cert_subject_rdn Property

A list of Property=Value pairs that uniquely identify the certificate holder (subject).

Syntax

def get_cert_subject_rdn() -> str: ...
def set_cert_subject_rdn(value: str) -> None: ...

cert_subject_rdn = property(get_cert_subject_rdn, set_cert_subject_rdn)

Default Value

""

Remarks

A list of Property=Value pairs that uniquely identify the certificate holder (subject).

Depending on the purpose of the certificate and the policies of the CA that issued it, the values included in the subject record may differ drastically and contain business or personal names, web URLs, email addresses, and other data.

Example: /C=US/O=Oranges and Apples, Inc./OU=Accounts Receivable/1.2.3.4.5=Value with unknown OID/CN=Margaret Watkins.

cert_valid Property

Indicates whether or not the signature over the certificate or the request is valid and matches the public key contained in the CA certificate/request.

Syntax

def get_cert_valid() -> bool: ...

cert_valid = property(get_cert_valid, None)

Default Value

FALSE

Remarks

Indicates whether or not the signature over the certificate or the request is valid and matches the public key contained in the CA certificate/request.

This property is read-only.

cert_valid_from Property

The time point at which the certificate becomes valid, in UTC.

Syntax

def get_cert_valid_from() -> str: ...
def set_cert_valid_from(value: str) -> None: ...

cert_valid_from = property(get_cert_valid_from, set_cert_valid_from)

Default Value

""

Remarks

The time point at which the certificate becomes valid, in UTC.

cert_valid_to Property

The time point at which the certificate expires, in UTC.

Syntax

def get_cert_valid_to() -> str: ...
def set_cert_valid_to(value: str) -> None: ...

cert_valid_to = property(get_cert_valid_to, set_cert_valid_to)

Default Value

""

Remarks

The time point at which the certificate expires, in UTC.

derivation_algorithm Property

Specifies the algorithm to use for key derivation.

Syntax

def get_derivation_algorithm() -> str: ...
def set_derivation_algorithm(value: str) -> None: ...

derivation_algorithm = property(get_derivation_algorithm, set_derivation_algorithm)

Default Value

"PKCS5"

Remarks

Use this property to specify the key derivation algorithm to use.

Class supports the following algorithms: PKCS5, BCrypt, SCrypt, Argon2d, Argon2i, Argon2id.

derive_iterations Property

Specifies the number of iterations to use as part of key derivation routine.

Syntax

def get_derive_iterations() -> int: ...
def set_derive_iterations(value: int) -> None: ...

derive_iterations = property(get_derive_iterations, set_derive_iterations)

Default Value

2048

Remarks

Use this property to adjust the number of hash algorithm iterations to employ as part of key derivation function.

fips_mode Property

Reserved.

Syntax

def get_fips_mode() -> bool: ...
def set_fips_mode(value: bool) -> None: ...

fips_mode = property(get_fips_mode, set_fips_mode)

Default Value

FALSE

Remarks

This property is reserved for future use.

hmac_algorithm Property

Specifies the HMAC algorithm to use with the key derivation algorithm.

Syntax

def get_hmac_algorithm() -> str: ...
def set_hmac_algorithm(value: str) -> None: ...

hmac_algorithm = property(get_hmac_algorithm, set_hmac_algorithm)

Default Value

"SHA1"

Remarks

Use this property to specify the HMAC algorithm to use with the chosen key derivation algorithm.

Class supports the following algorithms: SHA1, SHA224, SHA256, SHA384, SHA512, MD5, RIPEMD, HMAC.

key_algorithm Property

The algorithm of the cryptographic key.

Syntax

def get_key_algorithm() -> str: ...
def set_key_algorithm(value: str) -> None: ...

key_algorithm = property(get_key_algorithm, set_key_algorithm)

Default Value

""

Remarks

The algorithm of the cryptographic key. A cryptokey object may hold either symmetric, MAC, or public key. Public key algorithms: RSA, ECDSA, Elgamal, DH.

key_bits Property

The length of the key in bits.

Syntax

def get_key_bits() -> int: ...

key_bits = property(get_key_bits, None)

Default Value

0

Remarks

The length of the key in bits.

This property is read-only.

key_curve Property

This property specifies the name of the curve the EC key is built on.

Syntax

def get_key_curve() -> str: ...
def set_key_curve(value: str) -> None: ...

key_curve = property(get_key_curve, set_key_curve)

Default Value

""

Remarks

This property specifies the name of the curve the EC key is built on.

key_exportable Property

Returns True if the key is exportable (can be serialized into an array of bytes), and False otherwise.

Syntax

def get_key_exportable() -> bool: ...

key_exportable = property(get_key_exportable, None)

Default Value

FALSE

Remarks

Returns True if the key is exportable (can be serialized into an array of bytes), and False otherwise.

This property is read-only.

key_fingerprint Property

Contains the fingerprint (a hash imprint) of this key.

Syntax

def get_key_fingerprint() -> str: ...

key_fingerprint = property(get_key_fingerprint, None)

Default Value

""

Remarks

Contains the fingerprint (a hash imprint) of this key.

This property is read-only.

key_handle Property

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

def get_key_handle() -> int: ...
def set_key_handle(value: int) -> None: ...

key_handle = property(get_key_handle, set_key_handle)

Default Value

0

Remarks

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. pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

key_id Property

Provides access to a storage-specific key identifier.

Syntax

def get_key_id() -> bytes: ...
def set_key_id(value: bytes) -> None: ...

key_id = property(get_key_id, set_key_id)

Remarks

Provides access to a storage-specific key identifier. Key identifiers are used by cryptographic providers to refer to a particular key and/or distinguish between different keys. They are typically unique within a storage, but there is no guarantee that a particular cryptoprovider will conform to that (or will assign any key IDs at all).

key_iv Property

The initialization vector (IV) of a symmetric key.

Syntax

def get_key_iv() -> bytes: ...
def set_key_iv(value: bytes) -> None: ...

key_iv = property(get_key_iv, set_key_iv)

Remarks

The initialization vector (IV) of a symmetric key. This is normally a public part of a symmetric key, the idea of which is to introduce randomness to the encrypted data and/or serve as a first block in chaining ciphers.

key_key Property

The byte array representation of the key.

Syntax

def get_key_key() -> bytes: ...

key_key = property(get_key_key, None)

Remarks

The byte array representation of the key. This may not be available for non-key_exportable keys.

This property is read-only.

key_nonce Property

A nonce value associated with a key.

Syntax

def get_key_nonce() -> bytes: ...
def set_key_nonce(value: bytes) -> None: ...

key_nonce = property(get_key_nonce, set_key_nonce)

Remarks

A nonce value associated with a key. It is similar to IV, but its only purpose is to introduce randomness.

key_private Property

Returns True if the object hosts a private key, and False otherwise.

Syntax

def get_key_private() -> bool: ...

key_private = property(get_key_private, None)

Default Value

FALSE

Remarks

Returns True if the object hosts a private key, and False otherwise.

This property is read-only.

key_public Property

Returns True if the object hosts a public key, and False otherwise.

Syntax

def get_key_public() -> bool: ...

key_public = property(get_key_public, None)

Default Value

FALSE

Remarks

Returns True if the object hosts a public key, and False otherwise.

This property is read-only.

key_subject Property

Returns the key subject.

Syntax

def get_key_subject() -> bytes: ...
def set_key_subject(value: bytes) -> None: ...

key_subject = property(get_key_subject, set_key_subject)

Remarks

Returns the key subject. This is a cryptoprovider-dependent value, which normally aims to provide some user-friendly insight into the key owner.

key_symmetric Property

Returns True if the object contains a symmetric key, and False otherwise.

Syntax

def get_key_symmetric() -> bool: ...

key_symmetric = property(get_key_symmetric, None)

Default Value

FALSE

Remarks

Returns True if the object contains a symmetric key, and False otherwise.

This property is read-only.

key_valid Property

Returns True if this key is valid.

Syntax

def get_key_valid() -> bool: ...

key_valid = property(get_key_valid, None)

Default Value

FALSE

Remarks

Returns True if this key is valid. The term Valid highly depends on the kind of the key being stored. A symmetric key is considered valid if its length fits the algorithm being set. The validity of an RSA key also ensures that the RSA key elements (primes, exponents, and modulus) are consistent.

This property is read-only.

config Method

Sets or retrieves a configuration setting.

Syntax

def config(configuration_string: str) -> str: ...

Remarks

config is a generic method available in every class. It is used to set and retrieve configuration settings 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, you must call Config("PROPERTY"). The value will be returned as a string.

create_new Method

Creates a template for a new keypair.

Syntax

def create_new() -> None: ...

Remarks

This method pre-generates a template for a new key.

Adjust the properties of the key object and call generate to complete the generation.

derive_key Method

Generates a strong cryptographic key from a password.

Syntax

def derive_key(key_bits: int, password: str, salt: str) -> None: ...

Remarks

Use this method to generate a cryptographically strong key of a needed length from a password.

This method uses a general-purpose PBKDF2 function with PRF1 and 2048 iterations.

do_action Method

Performs an additional action.

Syntax

def do_action(action_id: str, action_params: str) -> str: ...

Remarks

do_action is a generic method available in every class. 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 (case insensitive) of the action is provided in the ActionID parameter.

ActionParams contains the value of a single parameter, or a list of multiple parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....

export_bytes Method

Exports the key to a byte array.

Syntax

def export_bytes(format: int, key_type: int, password: str) -> bytes: ...

Remarks

Use this method to save the key (both the public and secret parts) to a byte array.

export_to_cert Method

Exports the key to a certificate.

Syntax

def export_to_cert() -> None: ...

Remarks

Use this method to save the key (both the public and secret parts) to the certificate specified in certificate.

export_to_file Method

Exports the key to a file.

Syntax

def export_to_file(file_name: str, format: int, key_type: int, password: str) -> None: ...

Remarks

Use this method to save the key (both the public and secret parts) to the file passed via the FileName parameter.

generate Method

Generates a new crypto key.

Syntax

def generate(key_algorithm: str, scheme: str, scheme_params: str, key_bits: int) -> None: ...

Remarks

Call this method to generate a new key or keypair with the desired KeyAlgorithm and KeyBits of length.

The generated key will be populated in the key property.

get_key_param Method

Returns an algorithm-specific key parameter.

Syntax

def get_key_param(name: str) -> bytes: ...

Remarks

Use this method to retrieve an algorithm-specific key parameter.

get_key_param_str Method

Returns an algorithm-specific key parameter to a string.

Syntax

def get_key_param_str(name: str) -> str: ...

Remarks

Use this method to get an algorithm-specific key parameter to a string.

import_bytes Method

Loads a key from a byte array.

Syntax

def import_bytes(value: bytes, format: int, key_algorithm: str, scheme: str, scheme_params: str, key_type: int, password: str) -> None: ...

Remarks

Use this method to load a key, either public or secret, from a byte array.

Example using Custom Property arrays: Mgr.ImportBytes(ThirtyTwoKeyBytes, kffDER, "AES256", "", "", ktSecret)

import_from_cert Method

Loads a key from a certificate.

Syntax

def import_from_cert() -> None: ...

Remarks

Use this method to load a key, either public or secret, from a certificate.

import_from_file Method

Loads a key from a file.

Syntax

def import_from_file(file_name: str, format: int, key_algorithm: str, scheme: str, scheme_params: str, key_type: int, password: str) -> None: ...

Remarks

Use this method to load a key, either public or secret, from a file.

reset Method

Resets the class settings.

Syntax

def reset() -> None: ...

Remarks

reset is a generic method available in every class.

set_key_param Method

Sets an algorithm-specific key parameter.

Syntax

def set_key_param(name: str, value: bytes) -> None: ...

Remarks

Use this method to set an algorithm-specific key parameter.

set_key_param_str Method

Sets an algorithm-specific key parameter.

Syntax

def set_key_param_str(name: str, value_str: str) -> None: ...

Remarks

Use this method to set an algorithm-specific key parameter provided in a string.

on_error Event

Informs about an error during an operation.

Syntax

class CryptoKeyManagerErrorEventParams(object):
  @property
  def error_code() -> int: ...

  @property
  def description() -> str: ...

# In class CryptoKeyManager:
@property
def on_error() -> Callable[[CryptoKeyManagerErrorEventParams], None]: ...
@on_error.setter
def on_error(event_hook: Callable[[CryptoKeyManagerErrorEventParams], None]) -> None: ...

Remarks

The event is fired when an error happens in the middle of the class's work.

ErrorCode contains an error code and Description contains a textual description of the error.

on_notification Event

This event notifies the application about an underlying control flow event.

Syntax

class CryptoKeyManagerNotificationEventParams(object):
  @property
  def event_id() -> str: ...

  @property
  def event_param() -> str: ...

# In class CryptoKeyManager:
@property
def on_notification() -> Callable[[CryptoKeyManagerNotificationEventParams], None]: ...
@on_notification.setter
def on_notification(event_hook: Callable[[CryptoKeyManagerNotificationEventParams], None]) -> None: ...

Remarks

The class fires this event to let the application know about some event, occurrence, or milestone in the class. 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 the EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the class, the exact action it is performing, or the document being processed, one or both may be omitted.

on_password_needed Event

This event is fired when a decryption password is needed.

Syntax

class CryptoKeyManagerPasswordNeededEventParams(object):
  @property
  def needed_for() -> str: ...

  @property
  def password() -> str: ...
  @password.setter
  def password(value) -> None: ...

  @property
  def cancel() -> bool: ...
  @cancel.setter
  def cancel(value) -> None: ...

# In class CryptoKeyManager:
@property
def on_password_needed() -> Callable[[CryptoKeyManagerPasswordNeededEventParams], None]: ...
@on_password_needed.setter
def on_password_needed(event_hook: Callable[[CryptoKeyManagerPasswordNeededEventParams], None]) -> None: ...

Remarks

The class fires this event when a password is needed to decrypt a certificate or a private key.

In the handler of this event, assign the password to the Password parameter, or set Cancel to true to abort the operation.

The NeededFor parameter identifies the certificate for which the password is requested.

CryptoKeyManager Config Settings

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 method.

CryptoKeyManager Config Settings

Base Config Settings

CryptoKeyManager Errors

CryptoKeyManager Errors