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Add a SHA1 implementation

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Add an implementation of the SHA1 hash algorithm based on a public
domain project by Steve Reid <sreid@sea-to-sky.net>. You can get the
original sources from:

    ftp://ftp.funet.fi/pub/crypt/hash/sha/sha1.c

We will need this for several things. File names of note files will be
generated based on a hash their content instead of using a random name.
Items can be uniquely identified using a hash.

In addition to the regular sha1_init(), sha1_update() and sha1_final()
operations, our implementation also contains wrappers for hashing a
string or a stream.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
This commit is contained in:
Lukas Fleischer
2011-08-01 23:22:41 +02:00
parent 51c6386a05
commit 9dcb377a64
3 changed files with 300 additions and 0 deletions
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src/sha1.h Normal file
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/*
* Calcurse - text-based organizer
*
* Copyright (c) 2004-2011 calcurse Development Team <misc@calcurse.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Send your feedback or comments to : misc@calcurse.org
* Calcurse home page : http://calcurse.org
*
* This code is based on Steve Reid's public domain SHA1 implementation.
*
* The original version is available at:
* ftp://ftp.funet.fi/pub/crypt/hash/sha/sha1.c
*
*/
#include <stdint.h>
#define SHA1_BLOCKLEN 64
#define SHA1_DIGESTLEN 20
typedef struct {
uint32_t state[5];
uint32_t count[2];
uint8_t buffer[SHA1_BLOCKLEN];
} sha1_ctx_t;
void sha1_init (sha1_ctx_t *);
void sha1_update (sha1_ctx_t *, const uint8_t *, unsigned int);
void sha1_final (sha1_ctx_t *, uint8_t *);
void sha1_digest (const char *, char *);
void sha1_stream (FILE *, char *);