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#!/usr/bin/env python
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
"""
Reads a key specification from stdin or a file and outputs a
PKCS #8 file representing the (private) key. Also provides
methods for signing data and representing the key as a subject
public key info for use with pyasn1.
The key specification format is as follows:
default: a 2048-bit RSA key
alternate: a different 2048-bit RSA key
ev: a 2048-bit RSA key that, when combined with the right pycert
specification, results in a certificate that is enabled for
extended validation in debug Firefox (see ExtendedValidation.cpp).
evRSA2040: a 2040-bit RSA key that, when combined with the right pycert
specification, results in a certificate that is enabled for
extended validation in debug Firefox.
rsa2040: a 2040-bit RSA key
rsa1024: a 1024-bit RSA key
rsa1016: a 1016-bit RSA key
secp256k1: an ECC key on the curve secp256k1
secp244r1: an ECC key on the curve secp244r1
secp256r1: an ECC key on the curve secp256r1
secp384r1: an ECC key on the curve secp384r1
secp521r1: an ECC key on the curve secp521r1
mldsa44: an ML-DSA-44 key
mldsa65: an ML-DSA-65 key
mldsa87: an ML-DSA-87 key
"""
import base64
import binascii
import hashlib
import math
import sys
import ecdsa
import rsa
from pyasn1.codec.der import encoder
from pyasn1.type import namedtype, tag, univ
from pyasn1_modules import rfc2459
# "constants" to make it easier for consumers to specify hash algorithms
HASH_MD5 = "hash:md5"
HASH_SHA1 = "hash:sha1"
HASH_SHA256 = "hash:sha256"
HASH_SHA384 = "hash:sha384"
HASH_SHA512 = "hash:sha512"
# These libraries differ somewhat in terms of functionality and interface. In
# order to ensure there are no diffs and that the generated signatures are
# exactly the same between the two libraries, we need to patch some stuff in.
def _gen_k(curve):
# This calculation is arbitrary, but it matches what we were doing pre-
# non-random; the ecdsa library exposes an option to deterministically
# generate a value of k for us, but it doesn't match up to what we were
# doing before so we have to inject a custom value.
num_bytes = int(math.log(curve.order - 1, 2) + 1) // 8 + 8
entropy = int.from_bytes(b"\04" * num_bytes, byteorder="big")
p = curve.curve.p()
return (entropy % (p - 1)) + 1
# As above, the library has built-in logic for truncating digests that are too
# large, but they use a slightly different technique than our previous library.
# Re-implement that logic here.
def _truncate_digest(digest, curve):
i = int.from_bytes(digest, byteorder="big")
p = curve.curve.p()
while i > p:
i >>= 1
return i.to_bytes(math.ceil(i.bit_length() / 8), byteorder="big")
def byteStringToHexifiedBitString(bytes):
"""Takes a string of bytes and returns a hex string representing
those bytes for use with pyasn1.type.univ.BitString. It must be of
the form "'<hex bytes>'H", where the trailing 'H' indicates to
pyasn1 that the input is a hex string."""
return "'%s'H" % bytes.hex()
class UnknownBaseError(Exception):
"""Base class for handling unexpected input in this module."""
def __init__(self, value):
super().__init__()
self.value = value
self.category = "input"
def __str__(self):
return 'Unknown %s type "%s"' % (self.category, repr(self.value))
class UnknownKeySpecificationError(UnknownBaseError):
"""Helper exception type to handle unknown key specifications."""
def __init__(self, value):
UnknownBaseError.__init__(self, value)
self.category = "key specification"
class UnknownHashAlgorithmError(UnknownBaseError):
"""Helper exception type to handle unknown key specifications."""
def __init__(self, value):
UnknownBaseError.__init__(self, value)
self.category = "hash algorithm"
class UnsupportedHashAlgorithmError(Exception):
"""Helper exception type for unsupported hash algorithms."""
def __init__(self, value):
super().__init__()
self.value = value
def __str__(self):
return 'Unsupported hash algorithm "%s"' % repr(self.value)
class UnavailableMLDSAImplementationError(Exception):
"""Helper exception type for when the cryptography package (which
provides the ML-DSA implementation) isn't importable."""
def __init__(self, value):
super().__init__()
self.value = value
def __str__(self):
return (
f'The key specification "{self.value}" needs the cryptography '
"package (version 46 or later)"
)
class RSAPublicKey(univ.Sequence):
"""Helper type for encoding an RSA public key"""
componentType = namedtype.NamedTypes(
namedtype.NamedType("N", univ.Integer()),
namedtype.NamedType("E", univ.Integer()),
)
class RSAPrivateKey(univ.Sequence):
"""Helper type for encoding an RSA private key"""
componentType = namedtype.NamedTypes(
namedtype.NamedType("version", univ.Integer()),
namedtype.NamedType("modulus", univ.Integer()),
namedtype.NamedType("publicExponent", univ.Integer()),
namedtype.NamedType("privateExponent", univ.Integer()),
namedtype.NamedType("prime1", univ.Integer()),
namedtype.NamedType("prime2", univ.Integer()),
namedtype.NamedType("exponent1", univ.Integer()),
namedtype.NamedType("exponent2", univ.Integer()),
namedtype.NamedType("coefficient", univ.Integer()),
)
class ECPrivateKey(univ.Sequence):
"""Helper type for encoding an EC private key
ECPrivateKey ::= SEQUENCE {
version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
privateKey OCTET STRING,
parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
(NOTE: parameters field is not supported)
publicKey [1] BIT STRING OPTIONAL
}"""
componentType = namedtype.NamedTypes(
namedtype.NamedType("version", univ.Integer()),
namedtype.NamedType("privateKey", univ.OctetString()),
namedtype.OptionalNamedType(
"publicKey",
univ.BitString().subtype(
explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)
),
),
)
class ECPoint(univ.Sequence):
"""Helper type for encoding a EC point"""
componentType = namedtype.NamedTypes(
namedtype.NamedType("x", univ.Integer()),
namedtype.NamedType("y", univ.Integer()),
)
class PrivateKeyInfo(univ.Sequence):
"""Helper type for encoding a PKCS #8 private key info"""
componentType = namedtype.NamedTypes(
namedtype.NamedType("version", univ.Integer()),
namedtype.NamedType("privateKeyAlgorithm", rfc2459.AlgorithmIdentifier()),
namedtype.NamedType("privateKey", univ.OctetString()),
)
class RSAKey:
# For reference, when encoded as a subject public key info, the
# base64-encoded sha-256 hash of this key is
# VCIlmPM9NkgFQtrs4Oa5TeFcDu6MWRTKSNdePEhOgD8=
sharedRSA_N = int(
"00ba8851a8448e16d641fd6eb6880636103d3c13d9eae4354ab4ecf56857"
"6c247bc1c725a8e0d81fbdb19c069b6e1a86f26be2af5a756b6a6471087a"
"a55aa74587f71cd5249c027ecd43fc1e69d038202993ab20c349e4dbb94c"
"c26b6c0eed15820ff17ead691ab1d3023a8b2a41eea770e00f0d8dfd660b"
"2bb02492a47db988617990b157903dd23bc5e0b8481fa837d38843ef2716"
"d855b7665aaa7e02902f3a7b10800624cc1c6c97ad96615bb7e29612c075"
"31a30c91ddb4caf7fcad1d25d309efb9170ea768e1b37b2f226f69e3b48a"
"95611dee26d6259dab91084e36cb1c24042cbf168b2fe5f18f991731b8b3"
"fe4923fa7251c431d503acda180a35ed8d",
16,
)
sharedRSA_E = 65537
sharedRSA_D = int(
"009ecbce3861a454ecb1e0fe8f85dd43c92f5825ce2e997884d0e1a949da"
"a2c5ac559b240450e5ac9fe0c3e31c0eefa6525a65f0c22194004ee1ab46"
"3dde9ee82287cc93e746a91929c5e6ac3d88753f6c25ba5979e73e5d8fb2"
"39111a3cdab8a4b0cdf5f9cab05f1233a38335c64b5560525e7e3b92ad7c"
"7504cf1dc7cb005788afcbe1e8f95df7402a151530d5808346864eb370aa"
"79956a587862cb533791307f70d91c96d22d001a69009b923c683388c9f3"
"6cb9b5ebe64302041c78d908206b87009cb8cabacad3dbdb2792fb911b2c"
"f4db6603585be9ae0ca3b8e6417aa04b06e470ea1a3b581ca03a6781c931"
"5b62b30e6011f224725946eec57c6d9441",
16,
)
sharedRSA_P = int(
"00dd6e1d4fffebf68d889c4d114cdaaa9caa63a59374286c8a5c29a717bb"
"a60375644d5caa674c4b8bc7326358646220e4550d7608ac27d55b6db74f"
"8d8127ef8fa09098b69147de065573447e183d22fe7d885aceb513d9581d"
"d5e07c1a90f5ce0879de131371ecefc9ce72e9c43dc127d238190de81177"
"3ca5d19301f48c742b",
16,
)
sharedRSA_Q = int(
"00d7a773d9ebc380a767d2fec0934ad4e8b5667240771acdebb5ad796f47"
"8fec4d45985efbc9532968289c8d89102fadf21f34e2dd4940eba8c09d6d"
"1f16dcc29729774c43275e9251ddbe4909e1fd3bf1e4bedf46a39b8b3833"
"28ef4ae3b95b92f2070af26c9e7c5c9b587fedde05e8e7d86ca57886fb16"
"5810a77b9845bc3127",
16,
)
sharedRSA_exp1 = int(
"0096472b41a610c0ade1af2266c1600e3671355ba42d4b5a0eb4e9d7eb35"
"81400ba5dd132cdb1a5e9328c7bbc0bbb0155ea192972edf97d12751d8fc"
"f6ae572a30b1ea309a8712dd4e33241db1ee455fc093f5bc9b592d756e66"
"21474f32c07af22fb275d340792b32ba2590bbb261aefb95a258eea53765"
"5315be9c24d191992d",
16,
)
sharedRSA_exp2 = int(
"28b450a7a75a856413b2bda6f7a63e3d964fb9ecf50e3823ef6cc8e8fa26"
"ee413f8b9d1205540f12bbe7a0c76828b7ba65ad83cca4d0fe2a220114e1"
"b35d03d5a85bfe2706bd50fce6cfcdd571b46ca621b8ed47d605bbe765b0"
"aa4a0665ac25364da20154032e1204b8559d3e34fb5b177c9a56ff93510a"
"5a4a6287c151de2d",
16,
)
sharedRSA_coef = int(
"28067b9355801d2ef52dfa96d8adb589673cf8ee8a9c6ff72aeeabe9ef6b"
"e58a4f4abf05f788947dc851fdaa34542147a71a246bfb054ee76aa346ab"
"cd2692cfc9e44c51e6f069c735e073ba019f6a7214961c91b26871caeabf"
"8f064418a02690e39a8d5ff3067b7cdb7f50b1f53418a703966c4fc774bf"
"7402af6c43247f43",
16,
)
# For reference, when encoded as a subject public key info, the
# base64-encoded sha-256 hash of this key is
# MQj2tt1yGAfwFpWETYUCVrZxk2CD2705NKBQUlAaKJI=
alternateRSA_N = int(
"00c175c65266099f77082a6791f1b876c37f5ce538b06c4acd22b1cbd46f"
"a65ada2add41c8c2498ac4a3b3c1f61487f41b698941bd80a51c3c120244"
"c584a4c4483305e5138c0106cf08be9a862760bae6a2e8f36f23c5d98313"
"b9dfaf378345dace51d4d6dcd2a6cb3cc706ebcd3070ec98cce40aa591d7"
"295a7f71c5be66691d2b2dfec84944590bc5a3ea49fd93b1d753405f1773"
"7699958666254797ed426908880811422069988a43fee48ce68781dd22b6"
"a69cd28375131f932b128ce286fa7d251c062ad27ef016f187cdd54e832b"
"35b8930f74ba90aa8bc76167242ab1fd6d62140d18c4c0b8c68fc3748457"
"324ad7de86e6552f1d1e191d712168d3bb",
16,
)
alternateRSA_E = 65537
alternateRSA_D = int(
"7e3f6d7cb839ef66ae5d7dd92ff5410bb341dc14728d39034570e1a37079"
"0f30f0681355fff41e2ad4e9a9d9fcebfbd127bdfab8c00affb1f3cea732"
"7ead47aa1621f2ac1ee14ca02f04b3b2786017980b181a449d03b03e69d1"
"12b83571e55434f012056575d2832ed6731dce799e37c83f6d51c55ab71e"
"b58015af05e1af15c747603ef7f27d03a6ff049d96bbf854c1e4e50ef5b0"
"58d0fb08180e0ac7f7be8f2ff1673d97fc9e55dba838077bbf8a7cff2962"
"857785269cd9d5bad2b57469e4afcd33c4ca2d2f699f11e7c8fbdcd484f0"
"8d8efb8a3cb8a972eb24bed972efaae4bb712093e48fe94a46eb629a8750"
"78c4021a9a2c93c9a70390e9d0a54401",
16,
)
alternateRSA_P = int(
"00e63fc725a6ba76925a7ff8cb59c4f56dd7ec83fe85bf1f53e11cac9a81"
"258bcfc0ae819077b0f2d1477aaf868de6a8ecbeaf7bb22b196f2a9ad82d"
"3286f0d0cc29de719e5f2be8e509b7284d5963edd362f927887a4c4a8979"
"9d340d51b301ac7601ab27179024fcaadd38bf6522af63eb16461ec02a7f"
"27b06fe09ddda7c0a1",
16,
)
alternateRSA_Q = int(
"00d718b1fe9f8f99f00e832ae1fbdc6fe2ab27f34e049c498010fa0eb708"
"4852182346083b5c96c3eee5592c014a410c6b930b165c13b5c26aa32eac"
"6e7c925a8551c25134f2f4a72c6421f19a73148a0edfaba5d3a6888b35cb"
"a18c00fd38ee5aaf0b545731d720761bbccdee744a52ca415e98e4de01cd"
"fe764c1967b3e8cadb",
16,
)
alternateRSA_exp1 = int(
"01e5aca266c94a88d22e13c2b92ea247116c657a076817bdfd30db4b3a9d"
"3095b9a4b6749647e2f84e7a784fc7838b08c85971cf7a036fa30e3b91c3"
"c4d0df278f80c1b6e859d8456adb137defaa9f1f0ac5bac9a9184fd4ea27"
"9d722ea626f160d78aad7bc83845ccb29df115c83f61b7622b99bd439c60"
"9b5790a63c595181",
16,
)
alternateRSA_exp2 = int(
"0080cc45d10d2484ee0d1297fc07bf80b3beff461ea27e1f38f371789c3a"
"f66b4a0edd2192c227791db4f1c77ae246bf342f31856b0f56581b58a95b"
"1131c0c5396db2a8c3c6f39ea2e336bc205ae6a2a0b36869fca98cbba733"
"cf01319a6f9bb26b7ca23d3017fc551cd8da8afdd17f6fa2e30d34868798"
"1cd6234d571e90b7df",
16,
)
alternateRSA_coef = int(
"6f77c0c1f2ae7ac169561cca499c52bdfbe04cddccdbdc12aec5a85691e8"
"594b7ee29908f30e7b96aa6254b80ed4aeec9b993782bdfc79b69d8d58c6"
"8870fa4be1bc0c3527288c5c82bb4aebaf15edff110403fc78e6ace6a828"
"27bf42f0cfa751e507651c5638db9393dd23dd1f6b295151de44b77fe55a"
"7b0df271e19a65c0",
16,
)
evRSA_N = int(
"00b549895c9d00108d11a1f99f87a9e3d1a5db5dfaecf188da57bf641368"
"8f2ce4722cff109038c17402c93a2a473dbd286aed3fdcd363cf5a291477"
"01bdd818d7615bf9356bd5d3c8336aaa8c0971368a06c3cd4461b93e5142"
"4e1744bb2eaad46aab38ce196821961f87714a1663693f09761cdf4d6ba1"
"25eacec7be270d388f789f6cdf78ae3144ed28c45e79293863a7a22a4898"
"0a36a40e72d579c9b925dff8c793362ffd6897a7c1754c5e97c967c3eadd"
"1aae8aa2ccce348a0169b80e28a2d70c1a960c6f335f2da09b9b643f5abf"
"ba49e8aaa981e960e27d87480bdd55dd9417fa18509fbb554ccf81a4397e"
"8ba8128a34bdf27865c189e5734fb22905",
16,
)
evRSA_E = 65537
evRSA_D = int(
"00983d54f94d6f4c76eb23d6f93d78523530cf73b0d16254c6e781768d45"
"f55681d1d02fb2bd2aac6abc1c389860935c52a0d8f41482010394778314"
"1d864bff30803638a5c0152570ae9d18f3d8ca163efb475b0dddf32e7e16"
"ec7565e6bb5e025c41c5c66e57a03cede554221f83045347a2c4c451c3dc"
"e476b787ce0c057244be9e04ef13118dbbb3d5e0a6cc87029eafd4a69ed9"
"b14759b15e39d8a9884e56f54d2f9ab013f0d15f318a9ab6b2f73d1ec3c9"
"fe274ae89431a10640be7899b0011c5e5093a1834708689de100634dabde"
"60fbd6aaefa3a33df34a1f36f60c043036b748d1c9ee98c4031a0afec60e"
"fda0a990be524f5614eac4fdb34a52f951",
16,
)
evRSA_P = int(
"00eadc2cb33e5ff1ca376bbd95bd6a1777d2cf4fac47545e92d11a6209b9"
"d5e4ded47834581c169b3c884742a09ea187505c1ca55414d8d25b497632"
"d5ec2aaa05233430fad49892777a7d68e038f561a3b8969e60b0a263defb"
"fda48a9b0ff39d95bc88b15267c8ade97b5107948e41e433249d87f7db10"
"9d5d74584d86bcc1d7",
16,
)
evRSA_Q = int(
"00c59ae576a216470248d944a55b9e9bf93299da341ec56e558eba821abc"
"e1bf57b79cf411d2904c774f9dba1f15185f607b0574a08205d6ec28b66a"
"36d634232eaaf2fea37561abaf9d644b68db38c9964cb8c96ec0ac61eba6"
"4d05b446542f423976f5acde4ecc95536d2df578954f93f0cfd9c58fb78b"
"a2a76dd5ac284dc883",
16,
)
evRSA_exp1 = int(
"00c1d2ef3906331c52aca64811f9fe425beb2898322fb3db51032ce8d7e9"
"fc32240be92019cf2480fcd5e329837127118b2a59a1bfe06c883e3a4447"
"f3f031cd9aebd0b8d368fc79740d2cce8eadb324df7f091eafe1564361d5"
"4920b01b0471230e5e47d93f8ed33963c517bc4fc78f6d8b1f9eba85bcce"
"db7033026508db6285",
16,
)
evRSA_exp2 = int(
"008521b8db5694dfbe804a315f9efc9b65275c5490acf2a3456d65e6e610"
"bf9f647fc67501d4f5772f232ac70ccdef9fc2a6dfa415c7c41b6afc7af9"
"d07c3ca03f7ed93c09f0b99f2c304434322f1071709bbc1baa4c91575fa6"
"a959e07d4996956d95e22b57938b6e47c8d51ffedfc9bf888ce0d1a3e42b"
"65a89bed4b91d3e5f5",
16,
)
evRSA_coef = int(
"00dc497b06b920c8be0b0077b798e977eef744a90ec2c5d7e6cbb22448fa"
"c72da81a33180e0d8a02e831460c7fc7fd3a612f7b9930b61b799f8e908e"
"632e9ba0409b6aa70b03a3ba787426263b5bd5843df8476edb5d14f6a861"
"3ebaf5b9cd5ca42f5fbd2802e08e4e49e5709f5151510caa5ab2c1c6eb3e"
"fe9295d16e8c25c916",
16,
)
evRSA2040_N = int(
"00ca7020dc215f57914d343fae4a015111697af997a5ece91866499fc23f"
"1b88a118cbd30b10d91c7b9a0d4ee8972fcae56caf57f25fc1275a2a4dbc"
"b982428c32ef587bf2387410330a0ffb16b8029bd783969ef675f6de38c1"
"8f67193cb6c072f8b23d0b3374112627a57b90055771d9e62603f53788d7"
"f63afa724f5d108096df31f89f26b1eb5f7c4357980e008fcd55d827dd26"
"2395ca2f526a07897cc40c593b38716ebc0caa596719c6f29ac9b73a7a94"
"4748a3aa3e09e9eb4d461ea0027e540926614728b9d243975cf9a0541bef"
"d25e76b51f951110b0e7644fc7e38441791b6d2227384cb8004e23342372"
"b1cf5cc3e73e31b7bbefa160e6862ebb",
16,
)
evRSA2040_E = 65537
evRSA2040_D = int(
"00b2db74bce92362abf72955a638ae8720ba3033bb7f971caf39188d7542"
"eaa1c1abb5d205b1e2111f4791c08911a2e141e8cfd7054702d23100b564"
"2c06e1a31b118afd1f9a2f396cced425c501d91435ca8656766ced2b93bb"
"b8669fce9bacd727d1dacb3dafabc3293e35389eef8ea0b58e1aeb1a20e6"
"a61f9fcd453f7567fe31d123b616a26fef4df1d6c9f7490111d028eefd1d"
"972045b1a242273dd7a67ebf111db2741a5a93c7b2289cc4a236f5a99a6e"
"c7a8206fdae1c1d04bdbb1980d4a298c5a17dae4186474a5f7835d882bce"
"f24aef4ed6f149f94d96c9f7d78e647fc778a9017ff208d3b4a1768b1821"
"62102cdab032fabbab38d5200a324649",
16,
)
evRSA2040_P = int(
"0f3844d0d4d4d6a21acd76a6fc370b8550e1d7ec5a6234172e790f0029ae"
"651f6d5c59330ab19802b9d7a207de7a1fb778e3774fdbdc411750633d8d"
"1b3fe075006ffcfd1d10e763c7a9227d2d5f0c2dade1c9e659c350a159d3"
"6bb986f12636d4f9942b288bc0fe21da8799477173144249ca2e389e6c5c"
"25aa78c8cad7d4df",
16,
)
evRSA2040_Q = int(
"0d4d0bedd1962f07a1ead6b23a4ed67aeaf1270f052a6d29ba074945c636"
"1a5c4f8f07bf859e067aed3f4e6e323ef2aa8a6acd340b0bdc7cfe4fd329"
"e3c97f870c7f7735792c6aa9d0f7e7542a28ed6f01b0e55a2b8d9c24a65c"
"6da314c95484f5c7c3954a81bb016b07ed17ee9b06039695bca059a79f8d"
"c2423d328d5265a5",
16,
)
evRSA2040_exp1 = int(
"09f29a2ff05be8a96d614ba31b08935420a86c6bc42b99a6692ea0da5763"
"f01e596959b7ddce73ef9c2e4f6e5b40710887500d44ba0c3cd3132cba27"
"475f39c2df7552e2d123a2497a4f97064028769a48a3624657f72bf539f3"
"d0de234feccd3be8a0aa90c6bf6e9b0bed43070a24d061ff3ed1751a3ef2"
"ff7f6b90b9dbd5fb",
16,
)
evRSA2040_exp2 = int(
"01a659e170cac120a03be1cf8f9df1caa353b03593bd7476e5853bd874c2"
"87388601c6c341ce9d1d284a5eef1a3a669d32b816a5eaecd8b7844fe070"
"64b9bca0c2b318d540277b3f7f1510d386bb36e03b04771e5d229e88893e"
"13b753bfb94518bb638e2404bd6e6a993c1668d93fc0b82ff08aaf34347d"
"3fe8397108c87ca5",
16,
)
evRSA2040_coef = int(
"040257c0d4a21c0b9843297c65652db66304fb263773d728b6abfa06d37a"
"c0ca62c628023e09e37dc0a901e4ce1224180e2582a3aa4b6a1a7b98e2bd"
"70077aec14ac8ab66a755c71e0fc102471f9bbc1b46a95aa0b645f2c38e7"
"6450289619ea3f5e8ae61037bffcf8249f22aa4e76e2a01909f3feb290ce"
"93edf57b10ebe796",
16,
)
rsa2040_N = int(
"00bac0652fdfbc0055882ffbaeaceec88fa2d083c297dd5d40664dd3d90f"
"52f9aa02bd8a50fba16e0fd991878ef475f9b350d9f8e3eb2abd717ce327"
"b09788531f13df8e3e4e3b9d616bb8a41e5306eed2472163161051180127"
"6a4eb66f07331b5cbc8bcae7016a8f9b3d4f2ac4553c624cf5263bcb348e"
"8840de6612870960a792191b138fb217f765cec7bff8e94f16b39419bf75"
"04c59a7e4f79bd6d173e9c7bf3d9d2a4e73cc180b0590a73d584fb7fc9b5"
"4fa544607e53fc685c7a55fd44a81d4142b6af51ea6fa6cea52965a2e8c5"
"d84f3ca024d6fbb9b005b9651ce5d9f2ecf40ed404981a9ffc02636e311b"
"095c6332a0c87dc39271b5551481774b",
16,
)
rsa2040_E = 65537
rsa2040_D = int(
"603db267df97555cbed86b8df355034af28f1eb7f3e7829d239bcc273a7c"
"7a69a10be8f21f1b6c4b02c6bae3731c3158b5bbff4605f57ab7b7b2a0cb"
"a2ec005a2db5b1ea6e0aceea5bc745dcd2d0e9d6b80d7eb0ea2bc08127bc"
"e35fa50c42cc411871ba591e23ba6a38484a33eff1347f907ee9a5a92a23"
"11bb0b435510020f78e3bb00099db4d1182928096505fcba84f3ca1238fd"
"1eba5eea1f391bbbcc5424b168063fc17e1ca6e1912ccba44f9d0292308a"
"1fedb80612529b39f59d0a3f8180b5ba201132197f93a5815ded938df8e7"
"d93c9b15766588f339bb59100afda494a7e452d7dd4c9a19ce2ec3a33a18"
"b20f0b4dade172bee19f26f0dcbe41",
16,
)
rsa2040_P = int(
"0ec3869cb92d406caddf7a319ab29448bc505a05913707873361fc5b986a"
"499fb65eeb815a7e37687d19f128087289d9bb8818e7bcca502c4900ad9a"
"ece1179be12ff3e467d606fc820ea8f07ac9ebffe2236e38168412028822"
"3e42dbe68dfd972a85a6447e51695f234da7911c67c9ab9531f33df3b994"
"32d4ee88c9a4efbb",
16,
)
rsa2040_Q = int(
"0ca63934549e85feac8e0f5604303fd1849fe88af4b7f7e1213283bbc7a2"
"c2a509f9273c428c68de3db93e6145f1b400bd6d4a262614e9043ad362d4"
"eba4a6b995399c8934a399912199e841d8e8dbff0489f69e663796730b29"
"80530b31cb70695a21625ea2adccc09d930516fa872211a91e22dd89fd9e"
"b7da8574b72235b1",
16,
)
rsa2040_exp1 = int(
"0d7d3a75e17f65f8a658a485c4095c10a4f66979e2b73bca9cf8ef21253e"
"1facac6d4791f58392ce8656f88f1240cc90c29653e3100c6d7a38ed44b1"
"63b339e5f3b6e38912126c69b3ceff2e5192426d9649b6ffca1abb75d2ba"
"2ed6d9a26aa383c5973d56216ff2edb90ccf887742a0f183ac92c94cf187"
"657645c7772d9ad7",
16,
)
rsa2040_exp2 = int(
"03f550194c117f24bea285b209058032f42985ff55acebe88b16df9a3752"
"7b4e61dc91a68dbc9a645134528ce5f248bda2893c96cb7be79ee73996c7"
"c22577f6c2f790406f3472adb3b211b7e94494f32c5c6fcc0978839fe472"
"4c31b06318a2489567b4fca0337acb1b841227aaa5f6c74800a2306929f0"
"2ce038bad943df41",
16,
)
rsa2040_coef = int(
"080a7dbfa8c2584814c71664c56eb62ce4caf16afe88d4499159d674774a"
"3a3ecddf1256c02fc91525c527692422d0aba94e5c41ee12dc71bb66f867"
"9fa17e096f28080851ba046eb31885c1414e8985ade599d907af17453d1c"
"caea2c0d06443f8367a6be154b125e390ee0d90f746f08801dd3f5367f59"
"fba2e5a67c05f375",
16,
)
rsa1024_N = int(
"00d3a97440101eba8c5df9503e6f935eb52ffeb3ebe9d0dc5cace26f973c"
"a94cbc0d9c31d66c0c013bce9c82d0d480328df05fb6bcd7990a5312ddae"
"6152ad6ee61c8c1bdd8663c68bd36224a9882ae78e89f556dfdbe6f51da6"
"112cbfc27c8a49336b41afdb75321b52b24a7344d1348e646351a551c757"
"1ccda0b8fe35f61a75",
16,
)
rsa1024_E = 65537
rsa1024_D = int(
"5b6708e185548fc07ff062dba3792363e106ff9177d60ee3227162391024"
"1813f958a318f26db8b6a801646863ebbc69190d6c2f5e7723433e99666d"
"76b3987892cd568f1f18451e8dc05477c0607ee348380ebb7f4c98d0c036"
"a0260bc67b2dab46cbaa4ce87636d839d8fddcbae2da3e02e8009a21225d"
"d7e47aff2f82699d",
16,
)
rsa1024_P = int(
"00fcdee570323e8fc399dbfc63d8c1569546fb3cd6886c628668ab1e1d0f"
"ca71058febdf76d702970ad6579d80ac2f9521075e40ef8f3f39983bd819"
"07e898bad3",
16,
)
rsa1024_Q = int(
"00d64801c955b4eb75fbae230faa8b28c9cc5e258be63747ff5ac8d2af25"
"3e9f6d6ce03ea2eb13ae0eb32572feb848c32ca00743635374338fedacd8"
"c5885f7897",
16,
)
rsa1024_exp1 = int(
"76c0526d5b1b28368a75d5d42a01b9a086e20b9310241e2cd2d0b166a278"
"c694ff1e9d25d9193d47789b52bb0fa194de1af0b77c09007f12afdfeef9"
"58d108c3",
16,
)
rsa1024_exp2 = int(
"008a41898d8b14217c4d782cbd15ef95d0a660f45ed09a4884f4e170367b"
"946d2f20398b907896890e88fe17b54bd7febe133ebc7720c86fe0649cca"
"7ca121e05f",
16,
)
rsa1024_coef = int(
"22db133445f7442ea2a0f582031ee214ff5f661972986f172651d8d6b4ec"
"3163e99bff1c82fe58ec3d075c6d8f26f277020edb77c3ba821b9ba3ae18"
"ff8cb2cb",
16,
)
rsa1016_N = int(
"00d29bb12fb84fddcd29b3a519cb66c43b8d8f8be545ba79384ce663ed03"
"df75991600eb920790d2530cece544db99a71f05896a3ed207165534aa99"
"057e47c47e3bc81ada6fa1e12e37268b5046a55268f9dad7ccb485d81a2e"
"19d50d4f0b6854acaf6d7be69d9a083136e15afa8f53c1c8c84fc6077279"
"dd0e55d7369a5bdd",
16,
)
rsa1016_E = 65537
rsa1016_D = int(
"3c4965070bf390c251d5a2c5277c5b5fd0bdee85cad7fe2b27982bb28511"
"4a507004036ae1cf8ae54b25e4db39215abd7e903f618c2d8b2f08cc6cd1"
"2dbccd72205e4945b6b3df389e5e43de0a148bb2c84e2431fdbe5920b044"
"bb272f45ecff0721b7dfb60397fc613a9ea35c22300530cae8f9159c534d"
"f3bf0910951901",
16,
)
rsa1016_P = int(
"0f9f17597c85b8051b9c69afb55ef576c996dbd09047d0ccde5b9d60ea5c"
"67fe4fac67be803f4b6ac5a3f050f76b966fb14f5cf105761e5ade6dd960"
"b183ba55",
16,
)
rsa1016_Q = int(
"0d7b637112ce61a55168c0f9c9386fb279ab40cba0d549336bba65277263"
"aac782611a2c81d9b635cf78c40018859e018c5e9006d12e3d2ee6f346e7"
"9fa43369",
16,
)
rsa1016_exp1 = int(
"09fd6c9a3ea6e91ae32070f9fc1c210ff9352f97be5d1eeb951bb39681e9"
"dc5b672a532221b3d8900c9a9d99b9d0a4e102dc450ca1b87b0b1389de65"
"16c0ae0d",
16,
)
rsa1016_exp2 = int(
"0141b832491b7dd4a83308920024c79cae64bd447df883bb4c5672a96bab"
"48b7123b34f26324452cdceb17f21e570e347cbe2fd4c2d8f9910eac2cb6"
"d895b8c9",
16,
)
rsa1016_coef = int(
"0458dd6aee18c88b2f9b81f1bc3075ae20dc1f9973d20724f20b06043d61"
"47c8789d4a07ae88bc82c8438c893e017b13947f62e0b18958a31eb664b1"
"9e64d3e0",
16,
)
def __init__(self, specification):
if specification == "default":
self.RSA_N = self.sharedRSA_N
self.RSA_E = self.sharedRSA_E
self.RSA_D = self.sharedRSA_D
self.RSA_P = self.sharedRSA_P
self.RSA_Q = self.sharedRSA_Q
self.RSA_exp1 = self.sharedRSA_exp1
self.RSA_exp2 = self.sharedRSA_exp2
self.RSA_coef = self.sharedRSA_coef
elif specification == "alternate":
self.RSA_N = self.alternateRSA_N
self.RSA_E = self.alternateRSA_E
self.RSA_D = self.alternateRSA_D
self.RSA_P = self.alternateRSA_P
self.RSA_Q = self.alternateRSA_Q
self.RSA_exp1 = self.alternateRSA_exp1
self.RSA_exp2 = self.alternateRSA_exp2
self.RSA_coef = self.alternateRSA_coef
elif specification == "ev":
self.RSA_N = self.evRSA_N
self.RSA_E = self.evRSA_E
self.RSA_D = self.evRSA_D
self.RSA_P = self.evRSA_P
self.RSA_Q = self.evRSA_Q
self.RSA_exp1 = self.evRSA_exp1
self.RSA_exp2 = self.evRSA_exp2
self.RSA_coef = self.evRSA_coef
elif specification == "evRSA2040":
self.RSA_N = self.evRSA2040_N
self.RSA_E = self.evRSA2040_E
self.RSA_D = self.evRSA2040_D
self.RSA_P = self.evRSA2040_P
self.RSA_Q = self.evRSA2040_Q
self.RSA_exp1 = self.evRSA2040_exp1
self.RSA_exp2 = self.evRSA2040_exp2
self.RSA_coef = self.evRSA2040_coef
elif specification == "rsa2040":
self.RSA_N = self.rsa2040_N
self.RSA_E = self.rsa2040_E
self.RSA_D = self.rsa2040_D
self.RSA_P = self.rsa2040_P
self.RSA_Q = self.rsa2040_Q
self.RSA_exp1 = self.rsa2040_exp1
self.RSA_exp2 = self.rsa2040_exp2
self.RSA_coef = self.rsa2040_coef
elif specification == "rsa1024":
self.RSA_N = self.rsa1024_N
self.RSA_E = self.rsa1024_E
self.RSA_D = self.rsa1024_D
self.RSA_P = self.rsa1024_P
self.RSA_Q = self.rsa1024_Q
self.RSA_exp1 = self.rsa1024_exp1
self.RSA_exp2 = self.rsa1024_exp2
self.RSA_coef = self.rsa1024_coef
elif specification == "rsa1016":
self.RSA_N = self.rsa1016_N
self.RSA_E = self.rsa1016_E
self.RSA_D = self.rsa1016_D
self.RSA_P = self.rsa1016_P
self.RSA_Q = self.rsa1016_Q
self.RSA_exp1 = self.rsa1016_exp1
self.RSA_exp2 = self.rsa1016_exp2
self.RSA_coef = self.rsa1016_coef
else:
raise UnknownKeySpecificationError(specification)
def toDER(self):
privateKeyInfo = PrivateKeyInfo()
privateKeyInfo["version"] = 0
algorithmIdentifier = rfc2459.AlgorithmIdentifier()
algorithmIdentifier["algorithm"] = rfc2459.rsaEncryption
# Directly setting parameters to univ.Null doesn't currently work.
nullEncapsulated = encoder.encode(univ.Null())
algorithmIdentifier["parameters"] = univ.Any(nullEncapsulated)
privateKeyInfo["privateKeyAlgorithm"] = algorithmIdentifier
rsaPrivateKey = RSAPrivateKey()
rsaPrivateKey["version"] = 0
rsaPrivateKey["modulus"] = self.RSA_N
rsaPrivateKey["publicExponent"] = self.RSA_E
rsaPrivateKey["privateExponent"] = self.RSA_D
rsaPrivateKey["prime1"] = self.RSA_P
rsaPrivateKey["prime2"] = self.RSA_Q
rsaPrivateKey["exponent1"] = self.RSA_exp1
rsaPrivateKey["exponent2"] = self.RSA_exp2
rsaPrivateKey["coefficient"] = self.RSA_coef
rsaPrivateKeyEncoded = encoder.encode(rsaPrivateKey)
privateKeyInfo["privateKey"] = univ.OctetString(rsaPrivateKeyEncoded)
return encoder.encode(privateKeyInfo)
def toPEM(self):
output = "-----BEGIN PRIVATE KEY-----"
der = self.toDER()
b64 = base64.b64encode(der).decode()
while b64:
output += "\n" + b64[:64]
b64 = b64[64:]
output += "\n-----END PRIVATE KEY-----"
return output
def asSubjectPublicKeyInfo(self):
"""Returns a subject public key info representing
this key for use by pyasn1."""
algorithmIdentifier = rfc2459.AlgorithmIdentifier()
algorithmIdentifier["algorithm"] = rfc2459.rsaEncryption
# Directly setting parameters to univ.Null doesn't currently work.
nullEncapsulated = encoder.encode(univ.Null())
algorithmIdentifier["parameters"] = univ.Any(nullEncapsulated)
spki = rfc2459.SubjectPublicKeyInfo()
spki["algorithm"] = algorithmIdentifier
rsaKey = RSAPublicKey()
rsaKey["N"] = univ.Integer(self.RSA_N)
rsaKey["E"] = univ.Integer(self.RSA_E)
subjectPublicKey = univ.BitString(
byteStringToHexifiedBitString(encoder.encode(rsaKey))
)
spki["subjectPublicKey"] = subjectPublicKey
return spki
def sign(self, data, hashAlgorithm):
"""Returns a hexified bit string representing a
signature by this key over the specified data.
Intended for use with pyasn1.type.univ.BitString"""
hashAlgorithmName = None
if hashAlgorithm == HASH_MD5:
hashAlgorithmName = "MD5"
elif hashAlgorithm == HASH_SHA1:
hashAlgorithmName = "SHA-1"
elif hashAlgorithm == HASH_SHA256:
hashAlgorithmName = "SHA-256"
elif hashAlgorithm == HASH_SHA384:
hashAlgorithmName = "SHA-384"
elif hashAlgorithm == HASH_SHA512:
hashAlgorithmName = "SHA-512"
else:
raise UnknownHashAlgorithmError(hashAlgorithm)
rsaPrivateKey = rsa.PrivateKey(
self.RSA_N, self.RSA_E, self.RSA_D, self.RSA_P, self.RSA_Q
)
signature = rsa.sign(data, rsaPrivateKey, hashAlgorithmName)
return byteStringToHexifiedBitString(signature)
ecPublicKey = univ.ObjectIdentifier("1.2.840.10045.2.1")
secp256k1 = univ.ObjectIdentifier("1.3.132.0.10")
secp224r1 = univ.ObjectIdentifier("1.3.132.0.33")
secp256r1 = univ.ObjectIdentifier("1.2.840.10045.3.1.7")
secp384r1 = univ.ObjectIdentifier("1.3.132.0.34")
secp521r1 = univ.ObjectIdentifier("1.3.132.0.35")
def longToEvenLengthHexString(val):
h = format(val, "x")
if not len(h) % 2 == 0:
h = "0" + h
return h
class ECCKey:
secp256k1KeyPair = (
"35ee7c7289d8fef7a86afe5da66d8bc2ebb6a8543fd2fead089f45ce7acd0fa6"
+ "4382a9500c41dad770ffd4b511bf4b492eb1238800c32c4f76c73a3f3294e7c5",
"67cebc208a5fa3df16ec2bb34acc59a42ab4abb0538575ca99b92b6a2149a04f",
)
secp224r1KeyPair = (
"668d72cca6fd6a1b3557b5366104d84408ecb637f08e8c86bbff82cc"
+ "00e88f0066d7af63c3298ba377348a1202b03b37fd6b1ff415aa311e",
"04389459926c3296c242b83e10a6cd2011c8fe2dae1b772ea5b21067",
)
secp256r1KeyPair = (
"4fbfbbbb61e0f8f9b1a60a59ac8704e2ec050b423e3cf72e923f2c4f794b455c"
+ "2a69d233456c36c4119d0706e00eedc8d19390d7991b7b2d07a304eaa04aa6c0",
"2191403d5710bf15a265818cd42ed6fedf09add92d78b18e7a1e9feb95524702",
)
secp384r1KeyPair = (
"a1687243362b5c7b1889f379154615a1c73fb48dee863e022915db608e252de4b71"
+ "32da8ce98e831534e6a9c0c0b09c8d639ade83206e5ba813473a11fa330e05da8c9"
+ "6e4383fe27873da97103be2888cff002f05af71a1fddcc8374aa6ea9ce",
"035c7a1b10d9fafe837b64ad92f22f5ced0789186538669b5c6d872cec3d926122b"
+ "393772b57602ff31365efe1393246",
)
secp521r1KeyPair = (
"014cdc9cacc47941096bc9cc66752ec27f597734fa66c62b792f88c519d6d37f0d1"
+ "6ea1c483a1827a010b9128e3a08070ca33ef5f57835b7c1ba251f6cc3521dc42b01"
+ "0653451981b445d343eed3782a35d6cff0ff484f5a883d209f1b9042b726703568b"
+ "2f326e18b833bdd8aa0734392bcd19501e10d698a79f53e11e0a22bdd2aad90",
"014f3284fa698dd9fe1118dd331851cdfaac5a3829278eb8994839de9471c940b85"
+ "8c69d2d05e8c01788a7d0b6e235aa5e783fc1bee807dcc3865f920e12cf8f2d29",
)
def __init__(self, specification):
if specification == "secp256k1":
key_pair = self.secp256k1KeyPair
self.keyOID = secp256k1
self.curve = ecdsa.SECP256k1
elif specification == "secp224r1":
key_pair = self.secp224r1KeyPair
self.keyOID = secp224r1
self.curve = ecdsa.NIST224p
elif specification == "secp256r1":
key_pair = self.secp256r1KeyPair
self.keyOID = secp256r1
self.curve = ecdsa.NIST256p
elif specification == "secp384r1":
key_pair = self.secp384r1KeyPair
self.keyOID = secp384r1
self.curve = ecdsa.NIST384p
elif specification == "secp521r1":
key_pair = self.secp521r1KeyPair
self.keyOID = secp521r1
self.curve = ecdsa.NIST521p
else:
raise UnknownKeySpecificationError(specification)
self.public_key, self.private_key = (
binascii.unhexlify(key_pair[0]),
binascii.unhexlify(key_pair[1]),
)
self.key = ecdsa.SigningKey.from_string(self.private_key, curve=self.curve)
def getPublicKeyHexifiedString(self):
"""Returns the EC public key as a hex string using the uncompressed
point representation. This is intended to be used in the encoder
functions, as it surrounds the value with ''H to indicate its type."""
p1, p2 = (
self.public_key[: len(self.public_key) // 2],
self.public_key[len(self.public_key) // 2 :],
)
# We don't want leading zeroes.
p1, p2 = (p1.lstrip(b"\0"), p2.lstrip(b"\0"))
# '04' indicates that the points are in uncompressed form.
return byteStringToHexifiedBitString(b"\04" + p1 + p2)
def toPEM(self):
"""Return the EC private key in PEM-encoded form."""
output = "-----BEGIN EC PRIVATE KEY-----"
der = self.toDER()
b64 = base64.b64encode(der).decode()
while b64:
output += "\n" + b64[:64]
b64 = b64[64:]
output += "\n-----END EC PRIVATE KEY-----"
return output
def toDER(self):
"""Return the EC private key in DER-encoded form, encoded per SEC 1
section C.4 format."""
privateKeyInfo = PrivateKeyInfo()
privateKeyInfo["version"] = 0
algorithmIdentifier = rfc2459.AlgorithmIdentifier()
algorithmIdentifier["algorithm"] = ecPublicKey
algorithmIdentifier["parameters"] = self.keyOID
privateKeyInfo["privateKeyAlgorithm"] = algorithmIdentifier
ecPrivateKey = ECPrivateKey()
ecPrivateKey["version"] = 1
ecPrivateKey["privateKey"] = self.private_key
ecPrivateKey["publicKey"] = univ.BitString(
self.getPublicKeyHexifiedString()
).subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))
ecPrivateKeyEncoded = encoder.encode(ecPrivateKey)
privateKeyInfo["privateKey"] = univ.OctetString(ecPrivateKeyEncoded)
return encoder.encode(privateKeyInfo)
def asSubjectPublicKeyInfo(self):
"""Returns a subject public key info representing
this key for use by pyasn1."""
algorithmIdentifier = rfc2459.AlgorithmIdentifier()
algorithmIdentifier["algorithm"] = ecPublicKey
algorithmIdentifier["parameters"] = self.keyOID
spki = rfc2459.SubjectPublicKeyInfo()
spki["algorithm"] = algorithmIdentifier
spki["subjectPublicKey"] = univ.BitString(self.getPublicKeyHexifiedString())
return spki
def signRaw(self, data, hashAlgorithm):
"""Performs the ECDSA signature algorithm over the given data.
The returned value is a string representing the bytes of the
resulting point when encoded by left-padding each of (r, s) to
the key size and concatenating them.
"""
assert hashAlgorithm.startswith("hash:")
hashAlgorithm = hashAlgorithm[len("hash:") :]
k = _gen_k(self.curve)
digest = hashlib.new(hashAlgorithm, data).digest()
digest = _truncate_digest(digest, self.curve)
# NOTE: Under normal circumstances it's advisable to use
# sign_digest_deterministic. In this case we don't want the library's
# default generation of k, so we call the normal "sign" method and
# inject it here.
return self.key.sign_digest(digest, sigencode=ecdsa.util.sigencode_string, k=k)
def sign(self, data, hashAlgorithm):
"""Returns a hexified bit string representing a
signature by this key over the specified data.
Intended for use with pyasn1.type.univ.BitString"""
# signRaw returns an encoded point, which is useful in some situations.
# However, for signatures on X509 certificates, we need to decode it so
# we can encode it as a BITSTRING consisting of a SEQUENCE of two
# INTEGERs.
raw = self.signRaw(data, hashAlgorithm)
point = ECPoint()
point["x"] = int.from_bytes(raw[: len(raw) // 2], byteorder="big")
point["y"] = int.from_bytes(raw[len(raw) // 2 :], byteorder="big")
return byteStringToHexifiedBitString(encoder.encode(point))
mlDsa44 = univ.ObjectIdentifier("2.16.840.1.101.3.4.3.17")
mlDsa65 = univ.ObjectIdentifier("2.16.840.1.101.3.4.3.18")
mlDsa87 = univ.ObjectIdentifier("2.16.840.1.101.3.4.3.19")
class MLDSAKey:
"""An ML-DSA key (see FIPS 204). Key material is derived from a
fixed seed so that regenerating a certificate doesn't change the
key. Note that ML-DSA signatures are randomized, so regenerating a
certificate signed by one of these keys does change the
signature."""
# These seeds are arbitrary. They are the SHA-256 hashes of the
# corresponding key specifications.
mldsa44Seed = "5819dabdbff9b71586dabcaf20ec6ecfd66b0d1242fc327574071b320651014c"
mldsa65Seed = "d7a4bfd7b8e930a2d9fcea5b3a44ba23e3fffe57fd5e13a4a7fbf06730c64c8e"
mldsa87Seed = "7d2c69db079773fbe5b90b2431e36299c4e1bb5ac5664913f49eb24932d35ccd"
def __init__(self, specification):
try:
from cryptography.hazmat.primitives.asymmetric import mldsa
except ImportError:
raise UnavailableMLDSAImplementationError(specification)
if specification == "mldsa44":
seed = self.mldsa44Seed
self.keyOID = mlDsa44
keyType = mldsa.MLDSA44PrivateKey
elif specification == "mldsa65":
seed = self.mldsa65Seed
self.keyOID = mlDsa65
keyType = mldsa.MLDSA65PrivateKey
elif specification == "mldsa87":
seed = self.mldsa87Seed
self.keyOID = mlDsa87
keyType = mldsa.MLDSA87PrivateKey
else:
raise UnknownKeySpecificationError(specification)
self.key = keyType.from_seed_bytes(binascii.unhexlify(seed))
def toDER(self):
"""Returns this key as a PKCS #8 private key info. The private
key itself is the seed it was derived from."""
from cryptography.hazmat.primitives import serialization
return self.key.private_bytes(
serialization.Encoding.DER,
serialization.PrivateFormat.PKCS8,
serialization.NoEncryption(),
)
def toPEM(self):
output = "-----BEGIN PRIVATE KEY-----"
der = self.toDER()
b64 = base64.b64encode(der).decode()
while b64:
output += "\n" + b64[:64]
b64 = b64[64:]
output += "\n-----END PRIVATE KEY-----"
return output
def asSubjectPublicKeyInfo(self):
"""Returns a subject public key info representing
this key for use by pyasn1."""
algorithmIdentifier = rfc2459.AlgorithmIdentifier()
algorithmIdentifier["algorithm"] = self.keyOID
# RFC 9881 requires that the parameters field be absent.
spki = rfc2459.SubjectPublicKeyInfo()
spki["algorithm"] = algorithmIdentifier
spki["subjectPublicKey"] = univ.BitString(
byteStringToHexifiedBitString(self.key.public_key().public_bytes_raw())
)
return spki
def sign(self, data, _hashAlgorithm):
"""Returns a hexified bit string representing a
signature by this key over the specified data.
Intended for use with pyasn1.type.univ.BitString"""
# ML-DSA doesn't hash its input separately, so the hash algorithm is
# unused. RFC 9881 signatures use the pure variant of ML-DSA
# with an empty context string.
return byteStringToHexifiedBitString(self.key.sign(data))
def keyFromSpecification(specification):
"""Pass in a specification, get the appropriate key back."""
if specification.startswith("secp"):
return ECCKey(specification)
if specification.startswith("mldsa"):
return MLDSAKey(specification)
return RSAKey(specification)
# The build harness will call this function with an output file-like
# object and a path to a file containing a specification. This will
# read the specification and output the key as ASCII-encoded PKCS #8.
def main(output, inputPath):
with open(inputPath) as configStream:
output.write(keyFromSpecification(configStream.read().strip()).toPEM() + "\n")
# When run as a standalone program, this will read a specification from
# stdin and output the certificate as PEM to stdout.
if __name__ == "__main__":
print(keyFromSpecification(sys.stdin.read().strip()).toPEM())