Mercurial > dropbear
view ocb_encrypt_authenticate_memory.c @ 16:09ab3354aa21 libtomcrypt
propagate of e8bea23df30f9f46c647d06db3b223427b4e3604 and b0b6b4a8843b94d9f049cb5ffe0b1ae91ec1bf8b from branch 'au.asn.ucc.matt.ltc-orig' to 'au.asn.ucc.matt.ltc-db'
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 15 Jun 2004 14:27:14 +0000 |
parents | d7da3b1e1540 |
children | 5d99163f7e32 |
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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. * * Tom St Denis, [email protected], http://libtomcrypt.org */ /* OCB Implementation by Tom St Denis */ #include "mycrypt.h" #ifdef OCB_MODE int ocb_encrypt_authenticate_memory(int cipher, const unsigned char *key, unsigned long keylen, const unsigned char *nonce, const unsigned char *pt, unsigned long ptlen, unsigned char *ct, unsigned char *tag, unsigned long *taglen) { int err; ocb_state ocb; _ARGCHK(key != NULL); _ARGCHK(nonce != NULL); _ARGCHK(pt != NULL); _ARGCHK(ct != NULL); _ARGCHK(tag != NULL); _ARGCHK(taglen != NULL); if ((err = ocb_init(&ocb, cipher, key, keylen, nonce)) != CRYPT_OK) { return err; } while (ptlen > (unsigned long)ocb.block_len) { if ((err = ocb_encrypt(&ocb, pt, ct)) != CRYPT_OK) { return err; } ptlen -= ocb.block_len; pt += ocb.block_len; ct += ocb.block_len; } return ocb_done_encrypt(&ocb, pt, ptlen, ct, tag, taglen); } #endif