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hasher: Add helper to determine hash algorithm from signature scheme

This commit is contained in:
Tobias Brunner 2015-02-24 15:35:33 +01:00
parent 353294ea5c
commit d874101055
2 changed files with 44 additions and 0 deletions
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36
src/libstrongswan/crypto/hashers/hasher.c
View File

@ -364,3 +364,39 @@ int hasher_signature_algorithm_to_oid(hash_algorithm_t alg, key_type_t key)
}
}
/*
* Defined in header.
*/
hash_algorithm_t hasher_from_signature_scheme(signature_scheme_t scheme)
{
switch (scheme)
{
case SIGN_UNKNOWN:
case SIGN_RSA_EMSA_PKCS1_NULL:
case SIGN_ECDSA_WITH_NULL:
break;
case SIGN_RSA_EMSA_PKCS1_MD5:
return HASH_MD5;
case SIGN_RSA_EMSA_PKCS1_SHA1:
case SIGN_ECDSA_WITH_SHA1_DER:
return HASH_SHA1;
case SIGN_RSA_EMSA_PKCS1_SHA224:
return HASH_SHA224;
case SIGN_RSA_EMSA_PKCS1_SHA256:
case SIGN_ECDSA_WITH_SHA256_DER:
case SIGN_ECDSA_256:
case SIGN_BLISS_WITH_SHA256:
return HASH_SHA256;
case SIGN_RSA_EMSA_PKCS1_SHA384:
case SIGN_ECDSA_WITH_SHA384_DER:
case SIGN_ECDSA_384:
case SIGN_BLISS_WITH_SHA384:
return HASH_SHA384;
case SIGN_RSA_EMSA_PKCS1_SHA512:
case SIGN_ECDSA_WITH_SHA512_DER:
case SIGN_ECDSA_521:
case SIGN_BLISS_WITH_SHA512:
return HASH_SHA512;
}
return HASH_UNKNOWN;
}

8
src/libstrongswan/crypto/hashers/hasher.h
View File

@ -187,4 +187,12 @@ int hasher_algorithm_to_oid(hash_algorithm_t alg);
*/
int hasher_signature_algorithm_to_oid(hash_algorithm_t alg, key_type_t key);
/**
* Determine the hash algorithm associated with a given signature scheme.
*
* @param scheme signature scheme
* @return hash algorithm (could be HASH_UNKNOWN)
*/
hash_algorithm_t hasher_from_signature_scheme(signature_scheme_t scheme);
#endif /** HASHER_H_ @}*/