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/*
* BIRD Library -- SHA-256 and SHA-224 Hash Functions,
* HMAC-SHA-256 and HMAC-SHA-224 Functions
*
* (c) 2015 CZ.NIC z.s.p.o.
*
* Based on the code from libgcrypt-1.6.0, which is
* (c) 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_SHA256_H_
#define _BIRD_SHA256_H_
#include "nest/bird.h"
#define SHA224_SIZE 28
#define SHA224_HEX_SIZE 57
#define SHA224_BLOCK_SIZE 64
#define SHA256_SIZE 32
#define SHA256_HEX_SIZE 65
#define SHA256_BLOCK_SIZE 64
struct sha256_context {
u32 h0, h1, h2, h3, h4, h5, h6, h7;
byte buf[SHA256_BLOCK_SIZE];
uint nblocks;
uint count;
};
#define sha224_context sha256_context
void sha256_init(struct sha256_context *ctx);
void sha224_init(struct sha224_context *ctx);
void sha256_update(struct sha256_context *ctx, const byte *buf, size_t len);
static inline void sha224_update(struct sha224_context *ctx, const byte *buf, size_t len)
{ sha256_update(ctx, buf, len); }
byte *sha256_final(struct sha256_context *ctx);
static inline byte *sha224_final(struct sha224_context *ctx)
{ return sha256_final(ctx); }
/*
* HMAC-SHA256, HMAC-SHA224
*/
struct sha256_hmac_context
{
struct sha256_context ictx;
struct sha256_context octx;
};
#define sha224_hmac_context sha256_hmac_context
void sha256_hmac_init(struct sha256_hmac_context *ctx, const byte *key, size_t keylen);
void sha224_hmac_init(struct sha224_hmac_context *ctx, const byte *key, size_t keylen);
void sha256_hmac_update(struct sha256_hmac_context *ctx, const byte *buf, size_t buflen);
void sha224_hmac_update(struct sha224_hmac_context *ctx, const byte *buf, size_t buflen);
byte *sha256_hmac_final(struct sha256_hmac_context *ctx);
byte *sha224_hmac_final(struct sha224_hmac_context *ctx);
#endif /* _BIRD_SHA256_H_ */
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