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AES Provider Algorithms

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The following table lists the algorithms supported by the Microsoft Advanced Encryption Standard (AES) Cryptographic Provider.

Algorithm ID Description Comments
CALG_3DES Triple DES. Key length: 168 bits. Default mode: Cipher block chaining.
Block size: 64 bits.
No salt allowed.
CALG_3DES_112 Two-key triple DES encryption. Key length: 112 bits. Default mode: Cipher block chaining.
Block size: 64 bits.
No salt allowed.
CALG_AES_128 AES block encryption algorithm. Key length: 128 bits.
CALG_AES_192 AES block encryption algorithm. Key length: 192 bits.
CALG_AES_256 AES block encryption algorithm. Key length: 256 bits.
CALG_DES DES encryption. Key length: 56 bits. Default mode: Cipher block chaining.
Block size: 64 bits.
No salt allowed.
CALG_HMAC MAC keyed-hash algorithm. HMAC computation.
CALG_MAC Message Authentication Code (MAC) keyed hash algorithm. Block cipher MAC.
CALG_MD2 MD2 hashing algorithm. For more information, see MD2 algorithm.
CALG_MD5 MD5 hashing algorithm. For more information, see MD5 algorithm.
CALG_RC2 RC2 block encryption algorithm. Key length: 128 bits. Default mode: Cipher block chaining.
Block size: 64 bits.
Salt length: Can be set.
CALG_RC4 RC4 stream encryption algorithm. Key length: 128 bits. Salt length: Can be set.
CALG_RSA_KEYX RSA public key exchange algorithm. Key length: Can be set, 384 bits to 16,384 bits in 8-bit increments. Default key length: 1,024 bits.
CALG_RSA_SIGN RSA public key signature algorithm. Key length: Can be set, 384 bits to 16,384 bits in 8-bit increments. Default key length: 1,024 bits.
Signature conforms to PKCS #6.
CALG_SHA SHA hashing algorithm. For more information, see Secure Hash Algorithm.
CALG_SHA1 Same as CALG_SHA. For more information, see Secure Hash Algorithm.
CALG_SHA_256 SHA hashing algorithm. Key length: 256 bits.Windows XP: This algorithm is not supported.
CALG_SHA_384 SHA hashing algorithm. Key length: 384 bits.Windows XP: This algorithm is not supported.
CALG_SHA_512 SHA hashing algorithm. Key length: 512 bits.Windows XP: This algorithm is not supported.
CALG_SSL3_SHAMD5 SSL3 client authentication algorithm. For more information, see Creating a CALG_SSL3_SHAMD5 Hash.