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comparison libtomcrypt/src/mac/hmac/hmac_memory_multi.c @ 1471:6dba84798cd5

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Update to libtomcrypt 1.18.1, merged with Dropbear changes
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 21:44:05 +0800
parents f849a5ca2efc
children
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1470:8bba51a55704 1471:6dba84798cd5
3 * LibTomCrypt is a library that provides various cryptographic 3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtom.org
10 */ 8 */
11 #include "tomcrypt.h" 9 #include "tomcrypt.h"
12 #include <stdarg.h> 10 #include <stdarg.h>
13 11
14 /** 12 /**
15 @file hmac_memory_multi.c 13 @file hmac_memory_multi.c
16 LTC_HMAC support, process multiple blocks of memory, Tom St Denis/Dobes Vandermeer 14 HMAC support, process multiple blocks of memory, Tom St Denis/Dobes Vandermeer
17 */ 15 */
18 16
19 #ifdef LTC_HMAC 17 #ifdef LTC_HMAC
20 18
21 /** 19 /**
22 LTC_HMAC multiple blocks of memory to produce the authentication tag 20 HMAC multiple blocks of memory to produce the authentication tag
23 @param hash The index of the hash to use 21 @param hash The index of the hash to use
24 @param key The secret key 22 @param key The secret key
25 @param keylen The length of the secret key (octets) 23 @param keylen The length of the secret key (octets)
26 @param out [out] Destination of the authentication tag 24 @param out [out] Destination of the authentication tag
27 @param outlen [in/out] Max size and resulting size of authentication tag 25 @param outlen [in/out] Max size and resulting size of authentication tag
28 @param in The data to LTC_HMAC 26 @param in The data to HMAC
29 @param inlen The length of the data to LTC_HMAC (octets) 27 @param inlen The length of the data to HMAC (octets)
30 @param ... tuples of (data,len) pairs to LTC_HMAC, terminated with a (NULL,x) (x=don't care) 28 @param ... tuples of (data,len) pairs to HMAC, terminated with a (NULL,x) (x=don't care)
31 @return CRYPT_OK if successful 29 @return CRYPT_OK if successful
32 */ 30 */
33 int hmac_memory_multi(int hash, 31 int hmac_memory_multi(int hash,
34 const unsigned char *key, unsigned long keylen, 32 const unsigned char *key, unsigned long keylen,
35 unsigned char *out, unsigned long *outlen, 33 unsigned char *out, unsigned long *outlen,
36 const unsigned char *in, unsigned long inlen, ...) 34 const unsigned char *in, unsigned long inlen, ...)
37 35
38 { 36 {
42 const unsigned char *curptr; 40 const unsigned char *curptr;
43 unsigned long curlen; 41 unsigned long curlen;
44 42
45 LTC_ARGCHK(key != NULL); 43 LTC_ARGCHK(key != NULL);
46 LTC_ARGCHK(in != NULL); 44 LTC_ARGCHK(in != NULL);
47 LTC_ARGCHK(out != NULL); 45 LTC_ARGCHK(out != NULL);
48 LTC_ARGCHK(outlen != NULL); 46 LTC_ARGCHK(outlen != NULL);
49 47
50 /* allocate ram for hmac state */ 48 /* allocate ram for hmac state */
51 hmac = XMALLOC(sizeof(hmac_state)); 49 hmac = XMALLOC(sizeof(hmac_state));
52 if (hmac == NULL) { 50 if (hmac == NULL) {
56 if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) { 54 if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) {
57 goto LBL_ERR; 55 goto LBL_ERR;
58 } 56 }
59 57
60 va_start(args, inlen); 58 va_start(args, inlen);
61 curptr = in; 59 curptr = in;
62 curlen = inlen; 60 curlen = inlen;
63 for (;;) { 61 for (;;) {
64 /* process buf */ 62 /* process buf */
65 if ((err = hmac_process(hmac, curptr, curlen)) != CRYPT_OK) { 63 if ((err = hmac_process(hmac, curptr, curlen)) != CRYPT_OK) {
66 goto LBL_ERR; 64 goto LBL_ERR;
79 #ifdef LTC_CLEAN_STACK 77 #ifdef LTC_CLEAN_STACK
80 zeromem(hmac, sizeof(hmac_state)); 78 zeromem(hmac, sizeof(hmac_state));
81 #endif 79 #endif
82 XFREE(hmac); 80 XFREE(hmac);
83 va_end(args); 81 va_end(args);
84 return err; 82 return err;
85 } 83 }
86 84
87 #endif 85 #endif
88 86
89 87
90 /* $Source$ */ 88 /* ref: $Format:%D$ */
91 /* $Revision$ */ 89 /* git commit: $Format:%H$ */
92 /* $Date$ */ 90 /* commit time: $Format:%ai$ */