| // SPDX-License-Identifier: BSD-2-Clause |
| /* 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_private.h" |
| #include <stdarg.h> |
| |
| #ifdef LTC_BLAKE2SMAC |
| |
| /** |
| BLAKE2S MAC multiple blocks of memory to produce the authentication tag |
| @param key The secret key |
| @param keylen The length of the secret key (octets) |
| @param mac [out] Destination of the authentication tag |
| @param maclen [in/out] Max size and resulting size of authentication tag |
| @param in The data to BLAKE2S MAC |
| @param inlen The length of the data to BLAKE2S MAC (octets) |
| @param ... tuples of (data,len) pairs to BLAKE2S MAC, terminated with a (NULL,x) (x=don't care) |
| @return CRYPT_OK if successful |
| */ |
| int blake2smac_memory_multi(const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen, const unsigned char *in, unsigned long inlen, ...) |
| { |
| blake2smac_state st; |
| int err; |
| va_list args; |
| const unsigned char *curptr; |
| unsigned long curlen; |
| |
| LTC_ARGCHK(key != NULL); |
| LTC_ARGCHK(in != NULL); |
| LTC_ARGCHK(mac != NULL); |
| LTC_ARGCHK(maclen != NULL); |
| |
| va_start(args, inlen); |
| curptr = in; |
| curlen = inlen; |
| if ((err = blake2smac_init(&st, *maclen, key, keylen)) != CRYPT_OK) { goto LBL_ERR; } |
| for (;;) { |
| if ((err = blake2smac_process(&st, curptr, curlen)) != CRYPT_OK) { goto LBL_ERR; } |
| curptr = va_arg(args, const unsigned char*); |
| if (curptr == NULL) break; |
| curlen = va_arg(args, unsigned long); |
| } |
| err = blake2smac_done(&st, mac, maclen); |
| LBL_ERR: |
| #ifdef LTC_CLEAN_STACK |
| zeromem(&st, sizeof(blake2smac_state)); |
| #endif |
| va_end(args); |
| return err; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |