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Diffstat (limited to 'daemon/sha256.h')
| -rw-r--r-- | daemon/sha256.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/daemon/sha256.h b/daemon/sha256.h new file mode 100644 index 00000000..4a1d26ac --- /dev/null +++ b/daemon/sha256.h @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2000, 2001, 2002 Virtual Unlimited B.V. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/*!\file sha256.h + * \brief SHA-256 hash function, headers. + * \author Bob Deblier <bob.deblier@pandora.be> + * \ingroup HASH_m HASH_sha256_m + */ + +#ifndef _SHA256_H +#define _SHA256_H + +#include <glib.h> +#include "beecrypt_compat.h" + +/*!\brief Holds all the parameters necessary for the SHA-256 algorithm. + * \ingroup HASH_sha256_m + */ +typedef struct +{ + /*!\var h + */ + guint32 h[8]; + /*!\var data + */ + guint32 data[64]; + /*!\var length + * \brief Multi-precision integer counter for the bits that have been + * processed so far. + */ + #if (MP_WBITS == 64) + mpw length[1]; + #elif (MP_WBITS == 32) + mpw length[2]; + #else + # error + #endif + /*!\var offset + * \brief Offset into \a data; points to the place where new data will be + * copied before it is processed. + */ + guint32 offset; +} sha256Param; + +#ifdef __cplusplus +extern "C" { +#endif + +/*!\fn void sha256Process(sha256Param* sp) + * \brief This function performs the core of the SHA-256 hash algorithm; it + * processes a block of 64 bytes. + * \param sp The hash function's parameter block. + */ +BEECRYPTAPI +void sha256Process(sha256Param* sp); + +/*!\fn int sha256Reset(sha256Param* sp) + * \brief This function resets the parameter block so that it's ready for a + * new hash. + * \param sp The hash function's parameter block. + * \retval 0 on success. + */ +BEECRYPTAPI +int sha256Reset (sha256Param* sp); + +/*!\fn int sha256Update(sha256Param* sp, const byte* data, size_t size) + * \brief This function should be used to pass successive blocks of data + * to be hashed. + * \param sp The hash function's parameter block. + * \param data + * \param size + * \retval 0 on success. + */ +BEECRYPTAPI +int sha256Update (sha256Param* sp, const byte* data, size_t size); + +/*!\fn int sha256Digest(sha256Param* sp, byte* digest) + * \brief This function finishes the current hash computation and copies + * the digest value into \a digest. + * \param sp The hash function's parameter block. + * \param digest The place to store the 32-byte digest. + * \retval 0 on success. + */ +BEECRYPTAPI +int sha256Digest (sha256Param* sp, byte* digest); + +#ifdef __cplusplus +} +#endif + +#endif |