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95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
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This file is part of Pretty Curved Privacy (pcp1).
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Copyright (C) 2013 T.Linden.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact me by mail: <tlinden AT cpan DOT org>.
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*/
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#ifndef _HAVE_PCP_MAC
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#define _HAVE_PCP_MAC
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/**
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* \addtogroup CRYPTO
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* @{
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*/
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#include <strings.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sodium.h>
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#include "defines.h"
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#include "pad.h"
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#include "mem.h"
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/* how many times do we hash the passphrase */
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#define HCYCLES 128000
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/** Symmetrically encrypt a message.
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This function encrypts a message symmetrically
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using crypto_secretbox() using the given Curve25519 raw
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secret key and the nonce.
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It allocates apropriate memory for the result,
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which will be stored in \a cipher.
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\param[out] cipher Encrypted result.
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\param[in] cleartext Clear message.
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\param[in] clearsize Size of message.
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\param[in] nonce A random nonce (24 Bytes).
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\param[in] key A Curve25519 key (32 Bytes).
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\return Returns the size of \a cipher.
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*/
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size_t pcp_sodium_mac(byte **cipher,
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byte *cleartext,
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size_t clearsize,
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byte *nonce,
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byte *key);
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/** Decrypt a symmetrically encrypted message.
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This function decrypts a symmetrically encrypted message
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using crypto_secretbox_open() using the given Curve25519 raw
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secret key and the nonce.
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It allocates apropriate memory for the result,
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which will be stored in \a cleartext.
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\param[out] cleartext The decrypted result.
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\param[in] message The encrypted message.
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\param[in] messagesize Size of message.
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\param[in] nonce A random nonce (24 Bytes).
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\param[in] key A Curve25519 key (32 Bytes).
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\return Returns 0 in case of success of -1 in case of an error. Check fatals_if_any().
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*/
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int pcp_sodium_verify_mac(byte **cleartext,
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byte* message,
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size_t messagesize,
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byte *nonce,
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byte *key);
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#endif /* _HAVE_PCP_MAC */
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/**@}*/
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