MP-SPDZ/Tools/sha1.h

#ifndef _SHA1
#define _SHA1

#include <sodium.h>

/*
 * SHA1 routine optimized to do word accesses rather than byte accesses,
 * and to avoid unnecessary copies into the context array.
 *
 * This was initially based on the Mozilla SHA1 implementation, although
 * none of the original Mozilla code remains.
 */

#define HASH_SIZE 20

typedef struct {
	unsigned long long size;
	unsigned int H[5];
	unsigned int W[16];
} blk_SHA_CTX;

void blk_SHA1_Init(blk_SHA_CTX *ctx);
void blk_SHA1_Update(blk_SHA_CTX *ctx, const void *dataIn, unsigned long len);
void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx);

class octetStream;

class Hash
{
	static const int hash_length = crypto_generichash_BYTES;

	crypto_generichash_state state;

public:
	Hash()
	{
		crypto_generichash_init(&state, 0, 0, crypto_generichash_BYTES);
	}
	void update(const void *dataIn, unsigned long len)
	{
		crypto_generichash_update(&state, (unsigned char*)dataIn, len);
	}
	void update(const octetStream& os);
	void final(unsigned char hashout[hash_length])
	{
		crypto_generichash_final(&state, hashout, crypto_generichash_BYTES);
	}
	void final(octetStream& os);
	octetStream final();
};

#define git_SHA_CTX	blk_SHA_CTX
#define git_SHA1_Init	blk_SHA1_Init
#define git_SHA1_Update	blk_SHA1_Update
#define git_SHA1_Final	blk_SHA1_Final

#endif