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# coding: utf-8
from __future__ import unicode_literals, division, absolute_import, print_function
from .. import ffi
from .._ffi import new, null, unwrap
if ffi() == 'cffi':
from ._cng_cffi import bcrypt
else:
from ._cng_ctypes import bcrypt
__all__ = [
'bcrypt',
'BcryptConst',
'close_alg_handle',
'handle_error',
'open_alg_handle',
]
def open_alg_handle(constant, flags=0):
handle_pointer = new(bcrypt, 'BCRYPT_ALG_HANDLE *')
res = bcrypt.BCryptOpenAlgorithmProvider(handle_pointer, constant, null(), flags)
handle_error(res)
return unwrap(handle_pointer)
def close_alg_handle(handle):
res = bcrypt.BCryptCloseAlgorithmProvider(handle, 0)
handle_error(res)
def handle_error(error_num):
"""
Extracts the last Windows error message into a python unicode string
:param error_num:
The number to get the error string for
:return:
A unicode string error message
"""
if error_num == 0:
return
messages = {
BcryptConst.STATUS_NOT_FOUND: 'The object was not found',
BcryptConst.STATUS_INVALID_PARAMETER: 'An invalid parameter was passed to a service or function',
BcryptConst.STATUS_NO_MEMORY: (
'Not enough virtual memory or paging file quota is available to complete the specified operation'
),
BcryptConst.STATUS_INVALID_HANDLE: 'An invalid HANDLE was specified',
BcryptConst.STATUS_INVALID_SIGNATURE: 'The cryptographic signature is invalid',
BcryptConst.STATUS_NOT_SUPPORTED: 'The request is not supported',
BcryptConst.STATUS_BUFFER_TOO_SMALL: 'The buffer is too small to contain the entry',
BcryptConst.STATUS_INVALID_BUFFER_SIZE: 'The size of the buffer is invalid for the specified operation',
}
output = 'NTSTATUS error 0x%0.2X' % error_num
if error_num is not None and error_num in messages:
output += ': ' + messages[error_num]
raise OSError(output)
class BcryptConst():
BCRYPT_RNG_ALGORITHM = 'RNG'
BCRYPT_KEY_LENGTH = 'KeyLength'
BCRYPT_EFFECTIVE_KEY_LENGTH = 'EffectiveKeyLength'
BCRYPT_RSAPRIVATE_BLOB = 'RSAPRIVATEBLOB'
BCRYPT_RSAFULLPRIVATE_BLOB = 'RSAFULLPRIVATEBLOB'
BCRYPT_RSAPUBLIC_BLOB = 'RSAPUBLICBLOB'
BCRYPT_DSA_PRIVATE_BLOB = 'DSAPRIVATEBLOB'
BCRYPT_DSA_PUBLIC_BLOB = 'DSAPUBLICBLOB'
BCRYPT_ECCPRIVATE_BLOB = 'ECCPRIVATEBLOB'
BCRYPT_ECCPUBLIC_BLOB = 'ECCPUBLICBLOB'
BCRYPT_RSAPUBLIC_MAGIC = 0x31415352
BCRYPT_RSAPRIVATE_MAGIC = 0x32415352
BCRYPT_RSAFULLPRIVATE_MAGIC = 0x33415352
BCRYPT_DSA_PUBLIC_MAGIC = 0x42505344
BCRYPT_DSA_PRIVATE_MAGIC = 0x56505344
BCRYPT_DSA_PUBLIC_MAGIC_V2 = 0x32425044
BCRYPT_DSA_PRIVATE_MAGIC_V2 = 0x32565044
DSA_HASH_ALGORITHM_SHA1 = 0
DSA_HASH_ALGORITHM_SHA256 = 1
DSA_HASH_ALGORITHM_SHA512 = 2
DSA_FIPS186_2 = 0
DSA_FIPS186_3 = 1
BCRYPT_NO_KEY_VALIDATION = 8
BCRYPT_ECDSA_PUBLIC_P256_MAGIC = 0x31534345
BCRYPT_ECDSA_PRIVATE_P256_MAGIC = 0x32534345
BCRYPT_ECDSA_PUBLIC_P384_MAGIC = 0x33534345
BCRYPT_ECDSA_PRIVATE_P384_MAGIC = 0x34534345
BCRYPT_ECDSA_PUBLIC_P521_MAGIC = 0x35534345
BCRYPT_ECDSA_PRIVATE_P521_MAGIC = 0x36534345
STATUS_SUCCESS = 0x00000000
STATUS_NOT_FOUND = 0xC0000225
STATUS_INVALID_PARAMETER = 0xC000000D
STATUS_NO_MEMORY = 0xC0000017
STATUS_INVALID_HANDLE = 0xC0000008
STATUS_INVALID_SIGNATURE = 0xC000A000
STATUS_NOT_SUPPORTED = 0xC00000BB
STATUS_BUFFER_TOO_SMALL = 0xC0000023
STATUS_INVALID_BUFFER_SIZE = 0xC0000206
BCRYPT_KEY_DATA_BLOB_MAGIC = 0x4d42444b
BCRYPT_KEY_DATA_BLOB_VERSION1 = 0x00000001
BCRYPT_KEY_DATA_BLOB = 'KeyDataBlob'
BCRYPT_PAD_PKCS1 = 0x00000002
BCRYPT_PAD_OAEP = 0x00000004
BCRYPT_PAD_PSS = 0x00000008
BCRYPT_3DES_ALGORITHM = '3DES'
BCRYPT_3DES_112_ALGORITHM = '3DES_112'
BCRYPT_AES_ALGORITHM = 'AES'
BCRYPT_DES_ALGORITHM = 'DES'
BCRYPT_RC2_ALGORITHM = 'RC2'
BCRYPT_RC4_ALGORITHM = 'RC4'
BCRYPT_DSA_ALGORITHM = 'DSA'
BCRYPT_ECDSA_P256_ALGORITHM = 'ECDSA_P256'
BCRYPT_ECDSA_P384_ALGORITHM = 'ECDSA_P384'
BCRYPT_ECDSA_P521_ALGORITHM = 'ECDSA_P521'
BCRYPT_RSA_ALGORITHM = 'RSA'
BCRYPT_MD5_ALGORITHM = 'MD5'
BCRYPT_SHA1_ALGORITHM = 'SHA1'
BCRYPT_SHA256_ALGORITHM = 'SHA256'
BCRYPT_SHA384_ALGORITHM = 'SHA384'
BCRYPT_SHA512_ALGORITHM = 'SHA512'
BCRYPT_ALG_HANDLE_HMAC_FLAG = 0x00000008
BCRYPT_BLOCK_PADDING = 0x00000001
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