cryptography 49.0.0

49.0.0
Added 7
  • Added support for signing and verifying X.509 certificates, certificate signing requests, and certificate revocation lists with ML-DSA signing keys
  • Added support for loading certificates that contain ML-DSA public keys
  • Added enc_length() method to KEM to allow callers to split the encapsulated key from the ciphertext returned by encrypt()
  • Added support for using Certificate, CertificateSigningRequest, and CertificateRevocationList as field types in ASN.1 structures
  • Added value_set() class decorator to register an enum.Enum subclass as an ASN.1 value set
  • Added from_bytes() method for parsing a Name from DER bytes as the inverse of public_bytes()
  • Added rsa_padding keyword-only parameter to CertificateBuilder.public_key() to encode RSA subject public keys with the id-RSASSA-PSS OID
Changed 3
  • ChaCha20 now treats the first 4 bytes of the nonce as a 32-bit little-endian block counter as defined in RFC 7539 and tracks the number of bytes processed
  • Loading an X.509 certificate whose ECDSA or DSA signature AlgorithmIdentifier contains encoded NULL parameters now raises ValueError instead of loading with a deprecation warning
  • require_present(), may_be_present(), and require_not_present() now accept any extension type instead of only a fixed set
Fixed 2
  • ChaCha20 now raises ValueError when attempting to encrypt or decrypt more data than the counter allows before it would overflow, rather than silently diverging from RFC 7539
  • Fixed cross-compilation of the CFFI bindings when PYO3_CROSS_LIB_DIR is set by deriving the Python include directory from PYO3_CROSS_LIB_DIR instead of querying the host interpreter
Removed 3
  • Support for x86_64 macOS has been removed; only arm64 wheels are published for macOS
  • Support for 32-bit Windows has been removed
  • Removed deprecated type aliases PUBLIC_KEY_TYPES, PRIVATE_KEY_TYPES, CERTIFICATE_PRIVATE_KEY_TYPES, CERTIFICATE_ISSUER_PUBLIC_KEY_TYPES, and CERTIFICATE_PUBLIC_KEY_TYPES

From cryptography

  • BACKWARDS INCOMPATIBLE: Support for x86_64 macOS has been removed. We now only publish arm64 wheels for macOS.
  • BACKWARDS INCOMPATIBLE: Support for 32-bit Windows has been removed. Users should move to a 64-bit Python installation.
  • BACKWARDS INCOMPATIBLE: Removed the deprecated PUBLIC_KEY_TYPES, PRIVATE_KEY_TYPES, CERTIFICATE_PRIVATE_KEY_TYPES, CERTIFICATE_ISSUER_PUBLIC_KEY_TYPES, and CERTIFICATE_PUBLIC_KEY_TYPES type aliases. Use PublicKeyTypes, PrivateKeyTypes, CertificateIssuerPrivateKeyTypes, CertificateIssuerPublicKeyTypes, and CertificatePublicKeyTypesinstead. These were deprecated in version 40.0.
  • BACKWARDS INCOMPATIBLE: ChaCha20now treats the first 4 bytes of the nonce as a 32-bit little-endian block counter (as defined in RFC 7539) and tracks the number of bytes processed. Attempting to encrypt or decrypt more data than the counter allows before it would overflow now raises a ValueError rather than silently diverging from RFC 7539. Setting the counter portion of the nonce to zero allows encrypting up to 256 GiB with a given nonce.
  • BACKWARDS INCOMPATIBLE: Loading an X.509 certificate whose ECDSA or DSA signature AlgorithmIdentifier contains encoded NULL parameters now raises a ValueError. Such certificates are invalid, but older versions of Java emitted them; previously they loaded with a deprecation warning.
  • Fixed cross-compilation of the CFFI bindings when PYO3_CROSS_LIB_DIRis set. The build now derives the Python include directory from PYO3_CROSS_LIB_DIR instead of querying the host interpreter, which previously caused the build to fail during cross-compilations for embedded systems, on hosts which have same-version Python development headers installed as the target Python.
  • Added support for signing and verifying X.509 certificates, certificate signing requests, and certificate revocation lists with ML-DSA signing keys, as well as loading certificates that contain ML-DSA public keys.
  • Added enc_length() to KEM so callers can split the encapsulated key from the ciphertext returned by encrypt().
  • require_present(), may_be_present(), and require_not_present()now accept any extension type. Previously only a fixed set of extension types was supported, which made it impossible to account for otherwise unrecognized critical extensions during path validation.
  • Added support for using Certificate, CertificateSigningRequest, and CertificateRevocationList as field types in ASN.1 structures.
  • Added value_set(), a class decorator that registers an enum.Enum subclass as an ASN.1 value set: members are encoded as their underlying value, and decoding fails if the decoded value does not match one of the declared members.
  • Added from_bytes() for parsing a Name from DER bytes, the inverse of public_bytes().
  • Added the rsa_padding keyword-only parameter to public_key(). Passing the PSS class (not an instance) encodes an RSA subject public key in the certificate’s subjectPublicKeyInfo with the id-RSASSA-PSS OID and no parameters.
  • Added external mu (message representative) support to ML-DSA signing via the sign_mu and verify_mu methods, which sign and verify a precomputed 64-byte mu as defined in FIPS 204.
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