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Use a lookup table of algorithm types for alg_is_* helpers.

Browse Source 
This makes it easier to maintain these functions as algorithms are
added or removed.

Reviewed by:	cem
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D24668
This commit is contained in:
John Baldwin 2020-05-04 22:31:38 +00:00
parent 7985fd7e76
commit ad5570559b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=360642
1 changed files with 62 additions and 51 deletions
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113
sys/opencrypto/crypto.c
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@ -684,85 +684,96 @@ crypto_select_driver(const struct crypto_session_params *csp, int flags)
return best;
}
static enum alg_type {
ALG_NONE = 0,
ALG_CIPHER,
ALG_DIGEST,
ALG_KEYED_DIGEST,
ALG_COMPRESSION,
ALG_AEAD
} alg_types[] = {
[CRYPTO_DES_CBC] = ALG_CIPHER,
[CRYPTO_3DES_CBC] = ALG_CIPHER,
[CRYPTO_BLF_CBC] = ALG_CIPHER,
[CRYPTO_CAST_CBC] = ALG_CIPHER,
[CRYPTO_SKIPJACK_CBC] = ALG_CIPHER,
[CRYPTO_MD5_HMAC] = ALG_KEYED_DIGEST,
[CRYPTO_SHA1_HMAC] = ALG_KEYED_DIGEST,
[CRYPTO_RIPEMD160_HMAC] = ALG_KEYED_DIGEST,
[CRYPTO_MD5_KPDK] = ALG_KEYED_DIGEST,
[CRYPTO_SHA1_KPDK] = ALG_KEYED_DIGEST,
[CRYPTO_AES_CBC] = ALG_CIPHER,
[CRYPTO_ARC4] = ALG_CIPHER,
[CRYPTO_MD5] = ALG_DIGEST,
[CRYPTO_SHA1] = ALG_DIGEST,
[CRYPTO_NULL_HMAC] = ALG_DIGEST,
[CRYPTO_NULL_CBC] = ALG_CIPHER,
[CRYPTO_DEFLATE_COMP] = ALG_COMPRESSION,
[CRYPTO_SHA2_256_HMAC] = ALG_KEYED_DIGEST,
[CRYPTO_SHA2_384_HMAC] = ALG_KEYED_DIGEST,
[CRYPTO_SHA2_512_HMAC] = ALG_KEYED_DIGEST,
[CRYPTO_CAMELLIA_CBC] = ALG_CIPHER,
[CRYPTO_AES_XTS] = ALG_CIPHER,
[CRYPTO_AES_ICM] = ALG_CIPHER,
[CRYPTO_AES_NIST_GMAC] = ALG_KEYED_DIGEST,
[CRYPTO_AES_NIST_GCM_16] = ALG_AEAD,
[CRYPTO_BLAKE2B] = ALG_KEYED_DIGEST,
[CRYPTO_BLAKE2S] = ALG_KEYED_DIGEST,
[CRYPTO_CHACHA20] = ALG_CIPHER,
[CRYPTO_SHA2_224_HMAC] = ALG_KEYED_DIGEST,
[CRYPTO_RIPEMD160] = ALG_DIGEST,
[CRYPTO_SHA2_224] = ALG_DIGEST,
[CRYPTO_SHA2_256] = ALG_DIGEST,
[CRYPTO_SHA2_384] = ALG_DIGEST,
[CRYPTO_SHA2_512] = ALG_DIGEST,
[CRYPTO_POLY1305] = ALG_KEYED_DIGEST,
[CRYPTO_AES_CCM_CBC_MAC] = ALG_KEYED_DIGEST,
[CRYPTO_AES_CCM_16] = ALG_AEAD,
};
static enum alg_type
alg_type(int alg)
{
if (alg < nitems(alg_types))
return (alg_types[alg]);
return (ALG_NONE);
}
static bool
alg_is_compression(int alg)
{
if (alg == CRYPTO_DEFLATE_COMP)
return (true);
return (false);
return (alg_type(alg) == ALG_COMPRESSION);
}
static bool
alg_is_cipher(int alg)
{
if (alg >= CRYPTO_DES_CBC && alg <= CRYPTO_SKIPJACK_CBC)
return (true);
if (alg >= CRYPTO_AES_CBC && alg <= CRYPTO_ARC4)
return (true);
if (alg == CRYPTO_NULL_CBC)
return (true);
if (alg >= CRYPTO_CAMELLIA_CBC && alg <= CRYPTO_AES_ICM)
return (true);
if (alg == CRYPTO_CHACHA20)
return (true);
return (false);
return (alg_type(alg) == ALG_CIPHER);
}
static bool
alg_is_digest(int alg)
{
if (alg >= CRYPTO_MD5_HMAC && alg <= CRYPTO_SHA1_KPDK)
return (true);
if (alg >= CRYPTO_MD5 && alg <= CRYPTO_SHA1)
return (true);
if (alg == CRYPTO_NULL_HMAC)
return (true);
if (alg >= CRYPTO_SHA2_256_HMAC && alg <= CRYPTO_SHA2_512_HMAC)
return (true);
if (alg == CRYPTO_AES_NIST_GMAC)
return (true);
if (alg >= CRYPTO_BLAKE2B && alg <= CRYPTO_BLAKE2S)
return (true);
if (alg >= CRYPTO_SHA2_224_HMAC && alg <= CRYPTO_POLY1305)
return (true);
if (alg == CRYPTO_AES_CCM_CBC_MAC)
return (true);
return (false);
return (alg_type(alg) == ALG_DIGEST ||
alg_type(alg) == ALG_KEYED_DIGEST);
}
static bool
alg_is_keyed_digest(int alg)
{
if (alg >= CRYPTO_MD5_HMAC && alg <= CRYPTO_SHA1_KPDK)
return (true);
if (alg >= CRYPTO_SHA2_256_HMAC && alg <= CRYPTO_SHA2_512_HMAC)
return (true);
if (alg == CRYPTO_AES_NIST_GMAC)
return (true);
if (alg >= CRYPTO_BLAKE2B && alg <= CRYPTO_BLAKE2S)
return (true);
if (alg == CRYPTO_SHA2_224_HMAC)
return (true);
if (alg == CRYPTO_POLY1305)
return (true);
if (alg == CRYPTO_AES_CCM_CBC_MAC)
return (true);
return (false);
return (alg_type(alg) == ALG_KEYED_DIGEST);
}
static bool
alg_is_aead(int alg)
{
if (alg == CRYPTO_AES_NIST_GCM_16)
return (true);
if (alg == CRYPTO_AES_CCM_16)
return (true);
return (false);
return (alg_type(alg) == ALG_AEAD);
}
/* Various sanity checks on crypto session parameters. */