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added chacha_done

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This commit is contained in:
Karel Miko 2017-03-29 19:50:53 +02:00
parent ff6abc776c
commit c8cb714e08
4 changed files with 36 additions and 4 deletions
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1
src/encauth/chachapoly/chacha20poly1305_done.c
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@ -35,6 +35,7 @@ int chacha20poly1305_done(chachapoly_state *st, unsigned char *tag, unsigned lon
STORE64L(st->ctlen, buf + 8);
if ((err = poly1305_process(&st->poly, buf, 16)) != CRYPT_OK) return err;
if ((err = poly1305_done(&st->poly, tag, taglen)) != CRYPT_OK) return err;
if ((err = chacha_done(&st->chacha)) != CRYPT_OK) return err;
return CRYPT_OK;
}

1
src/headers/tomcrypt_cipher.h
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@ -954,6 +954,7 @@ int chacha_ivctr32(chacha_state *st, const unsigned char *iv, unsigned long ivle
int chacha_ivctr64(chacha_state *st, const unsigned char *iv, unsigned long ivlen, ulong64 counter);
int chacha_crypt(chacha_state *st, const unsigned char *in, unsigned long inlen, unsigned char *out);
int chacha_keystream(chacha_state *st, unsigned char *out, unsigned long outlen);
int chacha_done(chacha_state *st);
int chacha_test(void);
#endif /* LTC_CHACHA */

7
src/prngs/chacha.c
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@ -103,6 +103,7 @@ int chacha_prng_ready(prng_state *prng)
*/
unsigned long chacha_prng_read(unsigned char *out, unsigned long outlen, prng_state *prng)
{
LTC_ARGCHK(prng != NULL);
if (chacha_keystream(&prng->chacha.s, out, outlen) != CRYPT_OK) return 0;
return outlen;
}
@ -114,10 +115,8 @@ unsigned long chacha_prng_read(unsigned char *out, unsigned long outlen, prng_st
*/
int chacha_prng_done(prng_state *prng)
{
LTC_UNUSED_PARAM(prng);
prng->chacha.ready = 0;
XMEMSET(&prng->chacha.s, 0, sizeof(chacha_state));
return CRYPT_OK;
LTC_ARGCHK(prng != NULL);
return chacha_done(&prng->chacha.s);
}
/**

31
src/stream/chacha/chacha_done.c Normal file
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@ -0,0 +1,31 @@
/* 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:
* chacha-ref.c version 20080118
* Public domain from D. J. Bernstein
*/
#include "tomcrypt.h"
#ifdef LTC_CHACHA
/**
Terminate and clear ChaCha state
@param st The ChaCha state
@return CRYPT_OK on success
*/
int chacha_done(chacha_state *st)
{
LTC_ARGCHK(st != NULL);
XMEMSET(st, 0, sizeof(chacha_state));
return CRYPT_OK;
};
#endif