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comparison libtomcrypt/src/mac/pmac/pmac_file.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 e9dba7abd939
comparison
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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 10
13 /** 11 /**
14 @file pmac_file.c 12 @file pmac_file.c
15 PMAC implementation, process a file, by Tom St Denis 13 PMAC implementation, process a file, by Tom St Denis
16 */ 14 */
17 15
18 #ifdef LTC_PMAC 16 #ifdef LTC_PMAC
19 17
20 /** 18 /**
21 PMAC a file 19 PMAC a file
22 @param cipher The index of the cipher desired 20 @param cipher The index of the cipher desired
23 @param key The secret key 21 @param key The secret key
24 @param keylen The length of the secret key (octets) 22 @param keylen The length of the secret key (octets)
25 @param filename The name of the file to send through PMAC 23 @param filename The name of the file to send through PMAC
26 @param out [out] Destination for the authentication tag 24 @param out [out] Destination for the authentication tag
27 @param outlen [in/out] Max size and resulting size of the authentication tag 25 @param outlen [in/out] Max size and resulting size of the authentication tag
28 @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled 26 @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled
29 */ 27 */
30 int pmac_file(int cipher, 28 int pmac_file(int cipher,
31 const unsigned char *key, unsigned long keylen, 29 const unsigned char *key, unsigned long keylen,
32 const char *filename, 30 const char *filename,
33 unsigned char *out, unsigned long *outlen) 31 unsigned char *out, unsigned long *outlen)
34 { 32 {
35 #ifdef LTC_NO_FILE 33 #ifdef LTC_NO_FILE
36 return CRYPT_NOP; 34 return CRYPT_NOP;
37 #else 35 #else
38 int err, x; 36 size_t x;
37 int err;
39 pmac_state pmac; 38 pmac_state pmac;
40 FILE *in; 39 FILE *in;
41 unsigned char buf[512]; 40 unsigned char *buf;
42 41
43 42
44 LTC_ARGCHK(key != NULL); 43 LTC_ARGCHK(key != NULL);
45 LTC_ARGCHK(filename != NULL); 44 LTC_ARGCHK(filename != NULL);
46 LTC_ARGCHK(out != NULL); 45 LTC_ARGCHK(out != NULL);
47 LTC_ARGCHK(outlen != NULL); 46 LTC_ARGCHK(outlen != NULL);
48 47
49 in = fopen(filename, "rb"); 48 if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
50 if (in == NULL) { 49 return CRYPT_MEM;
51 return CRYPT_FILE_NOTFOUND;
52 } 50 }
53 51
54 if ((err = pmac_init(&pmac, cipher, key, keylen)) != CRYPT_OK) { 52 if ((err = pmac_init(&pmac, cipher, key, keylen)) != CRYPT_OK) {
55 fclose(in); 53 goto LBL_ERR;
56 return err; 54 }
55
56 in = fopen(filename, "rb");
57 if (in == NULL) {
58 err = CRYPT_FILE_NOTFOUND;
59 goto LBL_ERR;
57 } 60 }
58 61
59 do { 62 do {
60 x = fread(buf, 1, sizeof(buf), in); 63 x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
61 if ((err = pmac_process(&pmac, buf, x)) != CRYPT_OK) { 64 if ((err = pmac_process(&pmac, buf, (unsigned long)x)) != CRYPT_OK) {
62 fclose(in); 65 fclose(in);
63 return err; 66 goto LBL_CLEANBUF;
64 } 67 }
65 } while (x == sizeof(buf)); 68 } while (x == LTC_FILE_READ_BUFSIZE);
66 fclose(in);
67 69
68 if ((err = pmac_done(&pmac, out, outlen)) != CRYPT_OK) { 70 if (fclose(in) != 0) {
69 return err; 71 err = CRYPT_ERROR;
72 goto LBL_CLEANBUF;
70 } 73 }
71 74
75 err = pmac_done(&pmac, out, outlen);
76
77 LBL_CLEANBUF:
78 zeromem(buf, LTC_FILE_READ_BUFSIZE);
79 LBL_ERR:
72 #ifdef LTC_CLEAN_STACK 80 #ifdef LTC_CLEAN_STACK
73 zeromem(buf, sizeof(buf)); 81 zeromem(&pmac, sizeof(pmac_state));
74 #endif 82 #endif
75 83 XFREE(buf);
76 return CRYPT_OK; 84 return err;
77 #endif 85 #endif
78 } 86 }
79 87
80 #endif 88 #endif
81 89
82 /* $Source$ */ 90 /* ref: $Format:%D$ */
83 /* $Revision$ */ 91 /* git commit: $Format:%H$ */
84 /* $Date$ */ 92 /* commit time: $Format:%ai$ */