1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/* 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.h"
/**
@file pmac_file.c
PMAC implementation, process a file, by Tom St Denis
*/
#ifdef LTC_PMAC
/**
PMAC a file
@param cipher The index of the cipher desired
@param key The secret key
@param keylen The length of the secret key (octets)
@param filename The name of the file to send through PMAC
@param out [out] Destination for the authentication tag
@param outlen [in/out] Max size and resulting size of the authentication tag
@return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled
*/
int pmac_file(int cipher,
const unsigned char *key, unsigned long keylen,
const char *filename,
unsigned char *out, unsigned long *outlen)
{
#ifdef LTC_NO_FILE
LTC_UNUSED_PARAM(cipher);
LTC_UNUSED_PARAM(key);
LTC_UNUSED_PARAM(keylen);
LTC_UNUSED_PARAM(filename);
LTC_UNUSED_PARAM(out);
LTC_UNUSED_PARAM(outlen);
return CRYPT_NOP;
#else
size_t x;
int err;
pmac_state pmac;
FILE *in;
unsigned char *buf;
LTC_ARGCHK(key != NULL);
LTC_ARGCHK(filename != NULL);
LTC_ARGCHK(out != NULL);
LTC_ARGCHK(outlen != NULL);
if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
return CRYPT_MEM;
}
if ((err = pmac_init(&pmac, cipher, key, keylen)) != CRYPT_OK) {
goto LBL_ERR;
}
in = fopen(filename, "rb");
if (in == NULL) {
err = CRYPT_FILE_NOTFOUND;
goto LBL_ERR;
}
do {
x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
if ((err = pmac_process(&pmac, buf, (unsigned long)x)) != CRYPT_OK) {
fclose(in);
goto LBL_CLEANBUF;
}
} while (x == LTC_FILE_READ_BUFSIZE);
if (fclose(in) != 0) {
err = CRYPT_ERROR;
goto LBL_CLEANBUF;
}
err = pmac_done(&pmac, out, outlen);
LBL_CLEANBUF:
zeromem(buf, LTC_FILE_READ_BUFSIZE);
LBL_ERR:
#ifdef LTC_CLEAN_STACK
zeromem(&pmac, sizeof(pmac_state));
#endif
XFREE(buf);
return err;
#endif
}
#endif
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
|
