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hasher_algorithm_from_integrity() optionally returns truncation length

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This commit is contained in:
Tobias Brunner
2012-06-25 16:35:06 +02:00
parent 73d032e412
commit 903093d439
3 changed files with 45 additions and 7 deletions
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src/libstrongswan/crypto/hashers/hasher.c
+34 -2
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@@ -68,9 +68,41 @@ hash_algorithm_t hasher_algorithm_from_oid(int oid)
/*
* Described in header.
*/
hash_algorithm_t hasher_algorithm_from_integrity(integrity_algorithm_t integrity)
hash_algorithm_t hasher_algorithm_from_integrity(integrity_algorithm_t alg,
size_t *length)
{
switch (integrity)
if (length)
{
switch (alg)
{
case AUTH_HMAC_MD5_96:
case AUTH_HMAC_SHA1_96:
case AUTH_HMAC_SHA2_256_96:
*length = 12;
break;
case AUTH_HMAC_MD5_128:
case AUTH_HMAC_SHA1_128:
case AUTH_HMAC_SHA2_256_128:
*length = 16;
break;
case AUTH_HMAC_SHA1_160:
*length = 20;
break;
case AUTH_HMAC_SHA2_384_192:
*length = 24;
break;
case AUTH_HMAC_SHA2_256_256:
case AUTH_HMAC_SHA2_512_256:
*length = 32;
break;
case AUTH_HMAC_SHA2_384_384:
*length = 48;
break;
default:
break;
}
}
switch (alg)
{
case AUTH_HMAC_MD5_96:
case AUTH_HMAC_MD5_128: