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comparison libtomcrypt/src/encauth/ocb/ocb_done_decrypt.c @ 1511:5916af64acd4 fuzz

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merge from main
author Matt Johnston <matt@ucc.asn.au>
date Sat, 17 Feb 2018 19:29:51 +0800
parents 6dba84798cd5
children
comparison
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1457:32f990cc96b1 1511:5916af64acd4
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 9
12 /** 10 /**
13 @file ocb_done_decrypt.c 11 @file ocb_done_decrypt.c
14 OCB implementation, terminate decryption, by Tom St Denis 12 OCB implementation, terminate decryption, by Tom St Denis
15 */ 13 */
16 #include "tomcrypt.h" 14 #include "tomcrypt.h"
17 15
26 @param tag The authentication tag (to compare against) 24 @param tag The authentication tag (to compare against)
27 @param taglen The length of the authentication tag provided 25 @param taglen The length of the authentication tag provided
28 @param stat [out] The result of the tag comparison 26 @param stat [out] The result of the tag comparison
29 @return CRYPT_OK if the process was successful regardless if the tag is valid 27 @return CRYPT_OK if the process was successful regardless if the tag is valid
30 */ 28 */
31 int ocb_done_decrypt(ocb_state *ocb, 29 int ocb_done_decrypt(ocb_state *ocb,
32 const unsigned char *ct, unsigned long ctlen, 30 const unsigned char *ct, unsigned long ctlen,
33 unsigned char *pt, 31 unsigned char *pt,
34 const unsigned char *tag, unsigned long taglen, int *stat) 32 const unsigned char *tag, unsigned long taglen, int *stat)
35 { 33 {
36 int err; 34 int err;
37 unsigned char *tagbuf; 35 unsigned char *tagbuf;
38 unsigned long tagbuflen; 36 unsigned long tagbuflen;
55 tagbuflen = MAXBLOCKSIZE; 53 tagbuflen = MAXBLOCKSIZE;
56 if ((err = s_ocb_done(ocb, ct, ctlen, pt, tagbuf, &tagbuflen, 1)) != CRYPT_OK) { 54 if ((err = s_ocb_done(ocb, ct, ctlen, pt, tagbuf, &tagbuflen, 1)) != CRYPT_OK) {
57 goto LBL_ERR; 55 goto LBL_ERR;
58 } 56 }
59 57
60 if (taglen <= tagbuflen && XMEMCMP(tagbuf, tag, taglen) == 0) { 58 if (taglen <= tagbuflen && XMEM_NEQ(tagbuf, tag, taglen) == 0) {
61 *stat = 1; 59 *stat = 1;
62 } 60 }
63 61
64 err = CRYPT_OK; 62 err = CRYPT_OK;
65 LBL_ERR: 63 LBL_ERR:
73 } 71 }
74 72
75 #endif 73 #endif
76 74
77 75
78 /* $Source$ */ 76 /* ref: $Format:%D$ */
79 /* $Revision$ */ 77 /* git commit: $Format:%H$ */
80 /* $Date$ */ 78 /* commit time: $Format:%ai$ */