Mercurial > dropbear
view libtomcrypt/src/mac/hmac/hmac_file.c @ 1772:0cc85b4a4abb
Move fuzzer-kex initialisation into a constructor function
Hopefully this can avoid hitting AFL timeouts
https://github.com/google/oss-fuzz/pull/2474
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Thu, 29 Oct 2020 23:00:52 +0800 |
parents | e9dba7abd939 |
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_file.c HMAC support, process a file, Tom St Denis/Dobes Vandermeer */ #ifdef LTC_HMAC /** HMAC a file @param hash The index of the hash you wish to use @param fname The name of the file you wish to HMAC @param key The secret key @param keylen The length of the secret key @param out [out] The HMAC authentication tag @param outlen [in/out] The max size and resulting size of the authentication tag @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled */ int hmac_file(int hash, const char *fname, const unsigned char *key, unsigned long keylen, unsigned char *out, unsigned long *outlen) { #ifdef LTC_NO_FILE LTC_UNUSED_PARAM(hash); LTC_UNUSED_PARAM(fname); LTC_UNUSED_PARAM(key); LTC_UNUSED_PARAM(keylen); LTC_UNUSED_PARAM(out); LTC_UNUSED_PARAM(outlen); return CRYPT_NOP; #else hmac_state hmac; FILE *in; unsigned char *buf; size_t x; int err; LTC_ARGCHK(fname != NULL); LTC_ARGCHK(key != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) { return CRYPT_MEM; } if ((err = hash_is_valid(hash)) != CRYPT_OK) { goto LBL_ERR; } if ((err = hmac_init(&hmac, hash, key, keylen)) != CRYPT_OK) { goto LBL_ERR; } in = fopen(fname, "rb"); if (in == NULL) { err = CRYPT_FILE_NOTFOUND; goto LBL_ERR; } do { x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in); if ((err = hmac_process(&hmac, buf, (unsigned long)x)) != CRYPT_OK) { fclose(in); /* we don't trap this error since we're already returning an error! */ goto LBL_CLEANBUF; } } while (x == LTC_FILE_READ_BUFSIZE); if (fclose(in) != 0) { err = CRYPT_ERROR; goto LBL_CLEANBUF; } err = hmac_done(&hmac, out, outlen); LBL_CLEANBUF: zeromem(buf, LTC_FILE_READ_BUFSIZE); LBL_ERR: #ifdef LTC_CLEAN_STACK zeromem(&hmac, sizeof(hmac_state)); #endif XFREE(buf); return err; #endif } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */