Mercurial > dropbear
view libtomcrypt/src/encauth/chachapoly/chacha20poly1305_memory.c @ 1765:b688c884dad7
Fix fuzz-sshpacketmutator to work
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 26 Oct 2020 22:52:07 +0800 |
parents | 6dba84798cd5 |
children |
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/* 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" #ifdef LTC_CHACHA20POLY1305_MODE /** Process an entire GCM packet in one call. @param key The secret key @param keylen The length of the secret key @param iv The initialization vector @param ivlen The length of the initialization vector @param aad The additional authentication data (header) @param aadlen The length of the aad @param in The plaintext @param inlen The length of the plaintext (ciphertext length is the same) @param out The ciphertext @param tag [out] The MAC tag @param taglen [in/out] The MAC tag length @param direction Encrypt or Decrypt mode (CHACHA20POLY1305_ENCRYPT or CHACHA20POLY1305_DECRYPT) @return CRYPT_OK on success */ int chacha20poly1305_memory(const unsigned char *key, unsigned long keylen, const unsigned char *iv, unsigned long ivlen, const unsigned char *aad, unsigned long aadlen, const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned char *tag, unsigned long *taglen, int direction) { chacha20poly1305_state st; int err; LTC_ARGCHK(key != NULL); LTC_ARGCHK(iv != NULL); LTC_ARGCHK(in != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(tag != NULL); if ((err = chacha20poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; } if ((err = chacha20poly1305_setiv(&st, iv, ivlen)) != CRYPT_OK) { goto LBL_ERR; } if (aad && aadlen > 0) { if ((err = chacha20poly1305_add_aad(&st, aad, aadlen)) != CRYPT_OK) { goto LBL_ERR; } } if (direction == CHACHA20POLY1305_ENCRYPT) { if ((err = chacha20poly1305_encrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; } } else if (direction == CHACHA20POLY1305_DECRYPT) { if ((err = chacha20poly1305_decrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; } } else { err = CRYPT_INVALID_ARG; goto LBL_ERR; } err = chacha20poly1305_done(&st, tag, taglen); LBL_ERR: #ifdef LTC_CLEAN_STACK zeromem(&st, sizeof(chacha20poly1305_state)); #endif return err; } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */