blob: a827f8d38623627e8f7202e1bed9eb2a48954d8f (
plain)
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
|
/* 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.
*/
/* The implementation is based on:
* Public Domain poly1305 from Andrew Moon
* https://github.com/floodyberry/poly1305-donna
*/
#include "tomcrypt.h"
#ifdef LTC_POLY1305
/**
POLY1305 a block of memory to produce the authentication tag
@param key The secret key
@param keylen The length of the secret key (octets)
@param in The data to POLY1305
@param inlen The length of the data to POLY1305 (octets)
@param mac [out] Destination of the authentication tag
@param maclen [in/out] Max size and resulting size of authentication tag
@return CRYPT_OK if successful
*/
int poly1305_memory(const unsigned char *key, unsigned long keylen, const unsigned char *in, unsigned long inlen, unsigned char *mac, unsigned long *maclen)
{
poly1305_state st;
int err;
LTC_ARGCHK(key != NULL);
LTC_ARGCHK(in != NULL);
LTC_ARGCHK(mac != NULL);
LTC_ARGCHK(maclen != NULL);
if ((err = poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
if ((err = poly1305_process(&st, in, inlen)) != CRYPT_OK) { goto LBL_ERR; }
err = poly1305_done(&st, mac, maclen);
LBL_ERR:
#ifdef LTC_CLEAN_STACK
zeromem(&st, sizeof(poly1305_state));
#endif
return err;
}
#endif
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
|
