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"""
Default mappings for various key types and mechanisms.
None of this is provided for in PKCS#11 and its correctness should not be
assumed.
"""
from datetime import datetime
from struct import Struct
from .constants import (
Attribute,
CertificateType,
MechanismFlag,
ObjectClass,
)
from .mechanisms import Mechanism, KeyType, MGF
DEFAULT_GENERATE_MECHANISMS = {
KeyType.AES: Mechanism.AES_KEY_GEN,
KeyType.DES2: Mechanism.DES2_KEY_GEN,
KeyType.DES3: Mechanism.DES3_KEY_GEN,
KeyType.DH: Mechanism.DH_PKCS_KEY_PAIR_GEN,
KeyType.DSA: Mechanism.DSA_KEY_PAIR_GEN,
KeyType.EC: Mechanism.EC_KEY_PAIR_GEN,
KeyType.RSA: Mechanism.RSA_PKCS_KEY_PAIR_GEN,
KeyType.X9_42_DH: Mechanism.X9_42_DH_KEY_PAIR_GEN,
KeyType.EC_EDWARDS: Mechanism.EC_EDWARDS_KEY_PAIR_GEN,
}
"""
Default mechanisms for generating keys.
"""
_ENCRYPTION = MechanismFlag.ENCRYPT | MechanismFlag.DECRYPT
_SIGNING = MechanismFlag.SIGN | MechanismFlag.VERIFY
_WRAPPING = MechanismFlag.WRAP | MechanismFlag.UNWRAP
DEFAULT_KEY_CAPABILITIES = {
KeyType.AES: _ENCRYPTION | _SIGNING | _WRAPPING,
KeyType.DES2: _ENCRYPTION | _SIGNING | _WRAPPING,
KeyType.DES3: _ENCRYPTION | _SIGNING | _WRAPPING,
KeyType.DH: MechanismFlag.DERIVE,
KeyType.DSA: _SIGNING,
KeyType.EC: _SIGNING | MechanismFlag.DERIVE,
KeyType.RSA: _ENCRYPTION | _SIGNING | _WRAPPING,
KeyType.GENERIC_SECRET: 0,
KeyType.EC_EDWARDS: _SIGNING,
}
"""
Default capabilities for generating keys.
"""
DEFAULT_ENCRYPT_MECHANISMS = {
KeyType.AES: Mechanism.AES_CBC_PAD,
KeyType.DES2: Mechanism.DES3_CBC_PAD,
KeyType.DES3: Mechanism.DES3_CBC_PAD,
KeyType.RSA: Mechanism.RSA_PKCS_OAEP,
}
"""
Default mechanisms for encrypt/decrypt.
"""
DEFAULT_SIGN_MECHANISMS = {
KeyType.AES: Mechanism.AES_MAC,
KeyType.DES2: Mechanism.DES3_MAC,
KeyType.DES3: Mechanism.DES3_MAC,
KeyType.DSA: Mechanism.DSA_SHA512,
KeyType.EC: Mechanism.ECDSA_SHA512,
KeyType.RSA: Mechanism.SHA512_RSA_PKCS,
KeyType.EC_EDWARDS: Mechanism.EDDSA,
}
"""
Default mechanisms for sign/verify.
"""
DEFAULT_WRAP_MECHANISMS = {
KeyType.AES: Mechanism.AES_KEY_WRAP,
KeyType.DES2: Mechanism.DES3_ECB,
KeyType.DES3: Mechanism.DES3_ECB,
KeyType.RSA: Mechanism.RSA_PKCS_OAEP,
}
"""
Default mechanism for wrap/unwrap.
"""
DEFAULT_DERIVE_MECHANISMS = {
KeyType.DH: Mechanism.DH_PKCS_DERIVE,
KeyType.EC: Mechanism.ECDH1_DERIVE,
KeyType.X9_42_DH: Mechanism.X9_42_DH_DERIVE,
}
"""
Default mechanisms for key derivation
"""
DEFAULT_PARAM_GENERATE_MECHANISMS = {
KeyType.DH: Mechanism.DH_PKCS_PARAMETER_GEN,
KeyType.DSA: Mechanism.DSA_PARAMETER_GEN,
KeyType.X9_42_DH: Mechanism.X9_42_DH_PARAMETER_GEN,
}
"""
Default mechanisms for domain parameter generation
"""
DEFAULT_MECHANISM_PARAMS = {
Mechanism.RSA_PKCS_OAEP: (Mechanism.SHA_1, MGF.SHA1, None),
Mechanism.RSA_PKCS_PSS: (Mechanism.SHA_1, MGF.SHA1, 20),
}
"""
Default mechanism parameters
"""
# (Pack Function, Unpack Function) functions
_bool = (Struct('?').pack, lambda v: Struct('?').unpack(v)[0])
_ulong = (Struct('L').pack, lambda v: Struct('L').unpack(v)[0])
_str = (lambda s: s.encode('utf-8'), lambda b: b.decode('utf-8'))
_date = (lambda s: s.strftime('%Y%m%d').encode('ascii'),
lambda s: datetime.strptime(s.decode('ascii'), '%Y%m%d').date())
_bytes = (bytes, bytes)
# The PKCS#11 biginteger type is an array of bytes in network byte order.
# If you have an int type, wrap it in biginteger()
_biginteger = _bytes
def _enum(type_):
"""Factory to pack/unpack intos into IntEnums."""
pack, unpack = _ulong
return (lambda v: pack(int(v)),
lambda v: type_(unpack(v)))
ATTRIBUTE_TYPES = {
Attribute.ALWAYS_AUTHENTICATE: _bool,
Attribute.ALWAYS_SENSITIVE: _bool,
Attribute.APPLICATION: _str,
Attribute.BASE: _biginteger,
Attribute.CERTIFICATE_TYPE: _enum(CertificateType),
Attribute.CHECK_VALUE: _bytes,
Attribute.CLASS: _enum(ObjectClass),
Attribute.COEFFICIENT: _biginteger,
Attribute.DECRYPT: _bool,
Attribute.DERIVE: _bool,
Attribute.EC_PARAMS: _bytes,
Attribute.EC_POINT: _bytes,
Attribute.ENCRYPT: _bool,
Attribute.END_DATE: _date,
Attribute.EXPONENT_1: _biginteger,
Attribute.EXPONENT_2: _biginteger,
Attribute.EXTRACTABLE: _bool,
Attribute.HASH_OF_ISSUER_PUBLIC_KEY: _bytes,
Attribute.HASH_OF_SUBJECT_PUBLIC_KEY: _bytes,
Attribute.ID: _bytes,
Attribute.ISSUER: _bytes,
Attribute.KEY_GEN_MECHANISM: _enum(Mechanism),
Attribute.KEY_TYPE: _enum(KeyType),
Attribute.LABEL: _str,
Attribute.LOCAL: _bool,
Attribute.MODIFIABLE: _bool,
Attribute.COPYABLE: _bool,
Attribute.MODULUS: _biginteger,
Attribute.MODULUS_BITS: _ulong,
Attribute.NEVER_EXTRACTABLE: _bool,
Attribute.OBJECT_ID: _bytes,
Attribute.PRIME: _biginteger,
Attribute.PRIME_BITS: _ulong,
Attribute.PRIME_1: _biginteger,
Attribute.PRIME_2: _biginteger,
Attribute.PRIVATE: _bool,
Attribute.PRIVATE_EXPONENT: _biginteger,
Attribute.PUBLIC_EXPONENT: _biginteger,
Attribute.SENSITIVE: _bool,
Attribute.SERIAL_NUMBER: _bytes,
Attribute.SIGN: _bool,
Attribute.SIGN_RECOVER: _bool,
Attribute.START_DATE: _date,
Attribute.SUBJECT: _bytes,
Attribute.SUBPRIME: _biginteger,
Attribute.SUBPRIME_BITS: _ulong,
Attribute.TOKEN: _bool,
Attribute.TRUSTED: _bool,
Attribute.UNWRAP: _bool,
Attribute.URL: _str,
Attribute.VALUE: _biginteger,
Attribute.VALUE_BITS: _ulong,
Attribute.VALUE_LEN: _ulong,
Attribute.VERIFY: _bool,
Attribute.VERIFY_RECOVER: _bool,
Attribute.WRAP: _bool,
Attribute.WRAP_WITH_TRUSTED: _bool,
}
"""
Map of attributes to (serialize, deserialize) functions.
"""
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