65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/*
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* il_crypt.h - Implementation of useful cryptographic algorithms.
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*
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* Copyright (C) 2001 Southern Storm Software, Pty Ltd.
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef SHA256_H
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#define SHA256_H
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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//The size of SHA-256 hash values.
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#define SHA256_HASH_SIZE 32
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//Context block for SHA-256.
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typedef struct SHA256Context
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{
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unsigned char input[64];
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unsigned int inputLen;
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unsigned int A, B, C, D, E, F, G, H;
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unsigned long totalLen[2];
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//simulated long long in which [0] is most significant
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} SHA256Context;
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//Initialize a SHA-256 context block.
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void SHA256Init(SHA256Context *sha);
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//Input more data into a SHA-256 context block.
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void SHA256Data(SHA256Context *sha, const void *buffer, unsigned long len);
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//Finalize a SHA-256 context block and output the hash.
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void SHA256Finalize(SHA256Context *sha, unsigned char hash[SHA256_HASH_SIZE]);
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//computes the SHA256 of the remainder of the stream f (but does not close it)
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//Returns 0 on success, 1 on read error
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int SHA256Stream(FILE *f, unsigned char hash[SHA256_HASH_SIZE]);
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//computes the SHA256 of the file named filename
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//Returns 0 if successful, -1 if file not found, or 1 if read error.
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int SHA256File(const char *filename, unsigned char hash[SHA256_HASH_SIZE]);
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#ifdef __cplusplus
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};
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#endif
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#endif /* _IL_CRYPT_H */
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