Mercurial > dropbear
view libtomcrypt/src/mac/hmac/hmac_done.c @ 1693:f9ad4d39e388
Bring back -Werror and improve travis tests
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 26 May 2020 23:53:50 +0800 |
parents | 6dba84798cd5 |
children |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. */ #include "tomcrypt.h" /** @file hmac_done.c HMAC support, terminate stream, Tom St Denis/Dobes Vandermeer */ #ifdef LTC_HMAC #define LTC_HMAC_BLOCKSIZE hash_descriptor[hash].blocksize /** Terminate an HMAC session @param hmac The HMAC state @param out [out] The destination of the HMAC authentication tag @param outlen [in/out] The max size and resulting size of the HMAC authentication tag @return CRYPT_OK if successful */ int hmac_done(hmac_state *hmac, unsigned char *out, unsigned long *outlen) { unsigned char buf[MAXBLOCKSIZE], isha[MAXBLOCKSIZE]; unsigned long hashsize, i; int hash, err; LTC_ARGCHK(hmac != NULL); LTC_ARGCHK(out != NULL); /* test hash */ hash = hmac->hash; if((err = hash_is_valid(hash)) != CRYPT_OK) { return err; } /* get the hash message digest size */ hashsize = hash_descriptor[hash].hashsize; if ((err = hash_descriptor[hash].done(&hmac->md, isha)) != CRYPT_OK) { goto LBL_ERR; } /* Create the second HMAC vector vector for step (3) */ for(i=0; i < LTC_HMAC_BLOCKSIZE; i++) { buf[i] = hmac->key[i] ^ 0x5C; } /* Now calculate the "outer" hash for step (5), (6), and (7) */ if ((err = hash_descriptor[hash].init(&hmac->md)) != CRYPT_OK) { goto LBL_ERR; } if ((err = hash_descriptor[hash].process(&hmac->md, buf, LTC_HMAC_BLOCKSIZE)) != CRYPT_OK) { goto LBL_ERR; } if ((err = hash_descriptor[hash].process(&hmac->md, isha, hashsize)) != CRYPT_OK) { goto LBL_ERR; } if ((err = hash_descriptor[hash].done(&hmac->md, buf)) != CRYPT_OK) { goto LBL_ERR; } /* copy to output */ for (i = 0; i < hashsize && i < *outlen; i++) { out[i] = buf[i]; } *outlen = i; err = CRYPT_OK; LBL_ERR: XFREE(hmac->key); #ifdef LTC_CLEAN_STACK zeromem(isha, hashsize); zeromem(buf, hashsize); zeromem(hmac, sizeof(*hmac)); #endif return err; } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */