Mercurial > dropbear
diff libtomcrypt/src/encauth/eax/eax_decrypt.c @ 297:79bf1023cf11 agent-client
propagate from branch 'au.asn.ucc.matt.dropbear' (head 0501e6f661b5415eb76f3b312d183c3adfbfb712)
to branch 'au.asn.ucc.matt.dropbear.cli-agent' (head 01038174ec27245b51bd43a66c01ad930880f67b)
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Tue, 21 Mar 2006 16:20:59 +0000 |
parents | 1b9e69c058d2 |
children | 0cbe8f6dbf9e |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtomcrypt/src/encauth/eax/eax_decrypt.c Tue Mar 21 16:20:59 2006 +0000 @@ -0,0 +1,50 @@ +/* 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 + */ + +/** + @file eax_decrypt.c + EAX implementation, decrypt block, by Tom St Denis +*/ +#include "tomcrypt.h" + +#ifdef EAX_MODE + +/** + Decrypt data with the EAX protocol + @param eax The EAX state + @param ct The ciphertext + @param pt [out] The plaintext + @param length The length (octets) of the ciphertext + @return CRYPT_OK if successful +*/ +int eax_decrypt(eax_state *eax, const unsigned char *ct, unsigned char *pt, + unsigned long length) +{ + int err; + + LTC_ARGCHK(eax != NULL); + LTC_ARGCHK(pt != NULL); + LTC_ARGCHK(ct != NULL); + + /* omac ciphertext */ + if ((err = omac_process(&eax->ctomac, ct, length)) != CRYPT_OK) { + return err; + } + + /* decrypt */ + return ctr_decrypt(ct, pt, length, &eax->ctr); +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/encauth/eax/eax_decrypt.c,v $ */ +/* $Revision: 1.3 $ */ +/* $Date: 2005/05/05 14:35:58 $ */