mirror of
https://github.com/Laupetin/OpenAssetTools.git
synced 2025-04-21 16:45:44 +00:00
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/* 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"
|
|
#include <stdarg.h>
|
|
|
|
#ifdef LTC_POLY1305
|
|
|
|
/**
|
|
POLY1305 multiple blocks of memory to produce the authentication tag
|
|
@param key The secret key
|
|
@param keylen The length of the secret key (octets)
|
|
@param mac [out] Destination of the authentication tag
|
|
@param maclen [in/out] Max size and resulting size of authentication tag
|
|
@param in The data to POLY1305
|
|
@param inlen The length of the data to POLY1305 (octets)
|
|
@param ... tuples of (data,len) pairs to POLY1305, terminated with a (NULL,x) (x=don't care)
|
|
@return CRYPT_OK if successful
|
|
*/
|
|
int poly1305_memory_multi(const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen, const unsigned char *in, unsigned long inlen, ...)
|
|
{
|
|
poly1305_state st;
|
|
int err;
|
|
va_list args;
|
|
const unsigned char *curptr;
|
|
unsigned long curlen;
|
|
|
|
LTC_ARGCHK(key != NULL);
|
|
LTC_ARGCHK(in != NULL);
|
|
LTC_ARGCHK(mac != NULL);
|
|
LTC_ARGCHK(maclen != NULL);
|
|
|
|
va_start(args, inlen);
|
|
curptr = in;
|
|
curlen = inlen;
|
|
if ((err = poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
|
|
for (;;) {
|
|
if ((err = poly1305_process(&st, curptr, curlen)) != CRYPT_OK) { goto LBL_ERR; }
|
|
curptr = va_arg(args, const unsigned char*);
|
|
if (curptr == NULL) break;
|
|
curlen = va_arg(args, unsigned long);
|
|
}
|
|
err = poly1305_done(&st, mac, maclen);
|
|
LBL_ERR:
|
|
#ifdef LTC_CLEAN_STACK
|
|
zeromem(&st, sizeof(poly1305_state));
|
|
#endif
|
|
va_end(args);
|
|
return err;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* ref: HEAD -> master, tag: v1.18.2 */
|
|
/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
|
|
/* commit time: 2018-07-01 22:49:01 +0200 */
|