/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
#include "tomcrypt_private.h"
#ifdef LTC_SALSA20
/**
Encrypt (or decrypt) bytes of ciphertext (or plaintext) with Salsa20
@param key The key
@param keylen The key length
@param iv The initial vector
@param ivlen The initial vector length
@param datain The plaintext (or ciphertext)
@param datalen The length of the input and output (octets)
@param rounds The number of rounds
@param dataout [out] The ciphertext (or plaintext)
@return CRYPT_OK if successful
*/
int salsa20_memory(const unsigned char *key, unsigned long keylen, unsigned long rounds,
const unsigned char *iv, unsigned long ivlen, ulong64 counter,
const unsigned char *datain, unsigned long datalen, unsigned char *dataout)
{
salsa20_state st;
int err;
if ((err = salsa20_setup(&st, key, keylen, rounds)) != CRYPT_OK) goto WIPE_KEY;
if ((err = salsa20_ivctr64(&st, iv, ivlen, counter)) != CRYPT_OK) goto WIPE_KEY;
err = salsa20_crypt(&st, datain, datalen, dataout);
WIPE_KEY:
salsa20_done(&st);
return err;
}
#endif /* LTC_SALSA20 */