pbkdf2_ctypes.py 文件源码

def _openssl_hashlib_to_crypto_map_get(hashfunc):
    hashlib_to_crypto_map = {hashlib.md5: crypto.EVP_md5,
                                 hashlib.sha1: crypto.EVP_sha1,
                                 hashlib.sha256: crypto.EVP_sha256,
                                 hashlib.sha224: crypto.EVP_sha224,
                                 hashlib.sha384: crypto.EVP_sha384,
                                 hashlib.sha512: crypto.EVP_sha512}
    crypto_hashfunc = hashlib_to_crypto_map.get(hashfunc)
    if crypto_hashfunc is None:
        raise ValueError('Unkwnown digest %s' % hashfunc)
    crypto_hashfunc.restype = ctypes.c_void_p
    return crypto_hashfunc()