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/*
* SHA-384 hash implementation and interface functions
* Copyright (c) 2015, Pali Rohár <pali.rohar@gmail.com>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "sha384_i.h"
#include "crypto.h"
/**
* sha384_vector - SHA384 hash for data vector
* @num_elem: Number of elements in the data vector
* @addr: Pointers to the data areas
* @len: Lengths of the data blocks
* @mac: Buffer for the hash
* Returns: 0 on success, -1 of failure
*/
int sha384_vector(size_t num_elem, const u8 *addr[], const size_t *len,
u8 *mac)
{
struct sha384_state ctx;
size_t i;
sha384_init(&ctx);
for (i = 0; i < num_elem; i++)
if (sha384_process(&ctx, addr[i], len[i]))
return -1;
if (sha384_done(&ctx, mac))
return -1;
return 0;
}
/* ===== start - public domain SHA384 implementation ===== */
/* This is based on SHA384 implementation in LibTomCrypt that was released into
* public domain by Tom St Denis. */
#define CONST64(n) n ## ULL
/**
Initialize the hash state
@param md The hash state you wish to initialize
@return CRYPT_OK if successful
*/
void sha384_init(struct sha384_state *md)
{
md->curlen = 0;
md->length = 0;
md->state[0] = CONST64(0xcbbb9d5dc1059ed8);
md->state[1] = CONST64(0x629a292a367cd507);
md->state[2] = CONST64(0x9159015a3070dd17);
md->state[3] = CONST64(0x152fecd8f70e5939);
md->state[4] = CONST64(0x67332667ffc00b31);
md->state[5] = CONST64(0x8eb44a8768581511);
md->state[6] = CONST64(0xdb0c2e0d64f98fa7);
md->state[7] = CONST64(0x47b5481dbefa4fa4);
}
int sha384_process(struct sha384_state *md, const unsigned char *in,
unsigned long inlen)
{
return sha512_process(md, in, inlen);
}
/**
Terminate the hash to get the digest
@param md The hash state
@param out [out] The destination of the hash (48 bytes)
@return CRYPT_OK if successful
*/
int sha384_done(struct sha384_state *md, unsigned char *out)
{
unsigned char buf[64];
if (md->curlen >= sizeof(md->buf))
return -1;
if (sha512_done(md, buf) != 0)
return -1;
os_memcpy(out, buf, 48);
return 0;
}
/* ===== end - public domain SHA384 implementation ===== */
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