1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis */
2 /* SPDX-License-Identifier: Unlicense */
3 #include "tomcrypt_private.h"
4
5 /**
6 @file pmac_memory.c
7 PMAC implementation, process a block of memory, by Tom St Denis
8 */
9
10 #ifdef LTC_PMAC
11
12 /**
13 PMAC a block of memory
14 @param cipher The index of the cipher desired
15 @param key The secret key
16 @param keylen The length of the secret key (octets)
17 @param in The data you wish to send through PMAC
18 @param inlen The length of data you wish to send through PMAC (octets)
19 @param out [out] Destination for the authentication tag
20 @param outlen [in/out] The max size and resulting size of the authentication tag
21 @return CRYPT_OK if successful
22 */
pmac_memory(int cipher,const unsigned char * key,unsigned long keylen,const unsigned char * in,unsigned long inlen,unsigned char * out,unsigned long * outlen)23 int pmac_memory(int cipher,
24 const unsigned char *key, unsigned long keylen,
25 const unsigned char *in, unsigned long inlen,
26 unsigned char *out, unsigned long *outlen)
27 {
28 int err;
29 pmac_state *pmac;
30
31 LTC_ARGCHK(key != NULL);
32 LTC_ARGCHK(in != NULL);
33 LTC_ARGCHK(out != NULL);
34 LTC_ARGCHK(outlen != NULL);
35
36 /* allocate ram for pmac state */
37 pmac = XMALLOC(sizeof(pmac_state));
38 if (pmac == NULL) {
39 return CRYPT_MEM;
40 }
41
42 if ((err = pmac_init(pmac, cipher, key, keylen)) != CRYPT_OK) {
43 goto LBL_ERR;
44 }
45 if ((err = pmac_process(pmac, in, inlen)) != CRYPT_OK) {
46 goto LBL_ERR;
47 }
48 if ((err = pmac_done(pmac, out, outlen)) != CRYPT_OK) {
49 goto LBL_ERR;
50 }
51
52 err = CRYPT_OK;
53 LBL_ERR:
54 #ifdef LTC_CLEAN_STACK
55 zeromem(pmac, sizeof(pmac_state));
56 #endif
57
58 XFREE(pmac);
59 return err;
60 }
61
62 #endif
63