269 lines
8.5 KiB
C
269 lines
8.5 KiB
C
/* ====================================================================
|
|
* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. 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.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED 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 OpenSSL PROJECT OR
|
|
* ITS 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.
|
|
* ==================================================================== */
|
|
|
|
#include <openssl/base.h>
|
|
|
|
#include <assert.h>
|
|
|
|
#include "../../internal.h"
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
// This is a generic 32-bit "collector" for message digest algorithms. It
|
|
// collects input character stream into chunks of 32-bit values and invokes the
|
|
// block function that performs the actual hash calculations. To make use of
|
|
// this mechanism, the following macros must be defined before including
|
|
// md32_common.h.
|
|
//
|
|
// One of |DATA_ORDER_IS_BIG_ENDIAN| or |DATA_ORDER_IS_LITTLE_ENDIAN| must be
|
|
// defined to specify the byte order of the input stream.
|
|
//
|
|
// |HASH_CBLOCK| must be defined as the integer block size, in bytes.
|
|
//
|
|
// |HASH_CTX| must be defined as the name of the context structure, which must
|
|
// have at least the following members:
|
|
//
|
|
// typedef struct <name>_state_st {
|
|
// uint32_t h[<chaining length> / sizeof(uint32_t)];
|
|
// uint32_t Nl, Nh;
|
|
// uint8_t data[HASH_CBLOCK];
|
|
// unsigned num;
|
|
// ...
|
|
// } <NAME>_CTX;
|
|
//
|
|
// <chaining length> is the output length of the hash in bytes, before
|
|
// any truncation (e.g. 64 for SHA-224 and SHA-256, 128 for SHA-384 and
|
|
// SHA-512).
|
|
//
|
|
// |HASH_UPDATE| must be defined as the name of the "Update" function to
|
|
// generate.
|
|
//
|
|
// |HASH_TRANSFORM| must be defined as the the name of the "Transform"
|
|
// function to generate.
|
|
//
|
|
// |HASH_FINAL| must be defined as the name of "Final" function to generate.
|
|
//
|
|
// |HASH_BLOCK_DATA_ORDER| must be defined as the name of the "Block" function.
|
|
// That function must be implemented manually. It must be capable of operating
|
|
// on *unaligned* input data in its original (data) byte order. It must have
|
|
// this signature:
|
|
//
|
|
// void HASH_BLOCK_DATA_ORDER(uint32_t *state, const uint8_t *data,
|
|
// size_t num);
|
|
//
|
|
// It must update the hash state |state| with |num| blocks of data from |data|,
|
|
// where each block is |HASH_CBLOCK| bytes; i.e. |data| points to a array of
|
|
// |HASH_CBLOCK * num| bytes. |state| points to the |h| member of a |HASH_CTX|,
|
|
// and so will have |<chaining length> / sizeof(uint32_t)| elements.
|
|
//
|
|
// |HASH_MAKE_STRING(c, s)| must be defined as a block statement that converts
|
|
// the hash state |c->h| into the output byte order, storing the result in |s|.
|
|
|
|
#if !defined(DATA_ORDER_IS_BIG_ENDIAN) && !defined(DATA_ORDER_IS_LITTLE_ENDIAN)
|
|
#error "DATA_ORDER must be defined!"
|
|
#endif
|
|
|
|
#ifndef HASH_CBLOCK
|
|
#error "HASH_CBLOCK must be defined!"
|
|
#endif
|
|
#ifndef HASH_CTX
|
|
#error "HASH_CTX must be defined!"
|
|
#endif
|
|
|
|
#ifndef HASH_UPDATE
|
|
#error "HASH_UPDATE must be defined!"
|
|
#endif
|
|
#ifndef HASH_TRANSFORM
|
|
#error "HASH_TRANSFORM must be defined!"
|
|
#endif
|
|
#ifndef HASH_FINAL
|
|
#error "HASH_FINAL must be defined!"
|
|
#endif
|
|
|
|
#ifndef HASH_BLOCK_DATA_ORDER
|
|
#error "HASH_BLOCK_DATA_ORDER must be defined!"
|
|
#endif
|
|
|
|
#ifndef HASH_MAKE_STRING
|
|
#error "HASH_MAKE_STRING must be defined!"
|
|
#endif
|
|
|
|
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
|
|
|
|
#define HOST_c2l(c, l) \
|
|
do { \
|
|
(l) = (((uint32_t)(*((c)++))) << 24); \
|
|
(l) |= (((uint32_t)(*((c)++))) << 16); \
|
|
(l) |= (((uint32_t)(*((c)++))) << 8); \
|
|
(l) |= (((uint32_t)(*((c)++)))); \
|
|
} while (0)
|
|
|
|
#define HOST_l2c(l, c) \
|
|
do { \
|
|
*((c)++) = (uint8_t)(((l) >> 24) & 0xff); \
|
|
*((c)++) = (uint8_t)(((l) >> 16) & 0xff); \
|
|
*((c)++) = (uint8_t)(((l) >> 8) & 0xff); \
|
|
*((c)++) = (uint8_t)(((l)) & 0xff); \
|
|
} while (0)
|
|
|
|
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
|
|
|
|
#define HOST_c2l(c, l) \
|
|
do { \
|
|
(l) = (((uint32_t)(*((c)++)))); \
|
|
(l) |= (((uint32_t)(*((c)++))) << 8); \
|
|
(l) |= (((uint32_t)(*((c)++))) << 16); \
|
|
(l) |= (((uint32_t)(*((c)++))) << 24); \
|
|
} while (0)
|
|
|
|
#define HOST_l2c(l, c) \
|
|
do { \
|
|
*((c)++) = (uint8_t)(((l)) & 0xff); \
|
|
*((c)++) = (uint8_t)(((l) >> 8) & 0xff); \
|
|
*((c)++) = (uint8_t)(((l) >> 16) & 0xff); \
|
|
*((c)++) = (uint8_t)(((l) >> 24) & 0xff); \
|
|
} while (0)
|
|
|
|
#endif // DATA_ORDER
|
|
|
|
int HASH_UPDATE(HASH_CTX *c, const void *data_, size_t len) {
|
|
const uint8_t *data = data_;
|
|
|
|
if (len == 0) {
|
|
return 1;
|
|
}
|
|
|
|
uint32_t l = c->Nl + (((uint32_t)len) << 3);
|
|
if (l < c->Nl) {
|
|
// Handle carries.
|
|
c->Nh++;
|
|
}
|
|
c->Nh += (uint32_t)(len >> 29);
|
|
c->Nl = l;
|
|
|
|
size_t n = c->num;
|
|
if (n != 0) {
|
|
if (len >= HASH_CBLOCK || len + n >= HASH_CBLOCK) {
|
|
OPENSSL_memcpy(c->data + n, data, HASH_CBLOCK - n);
|
|
HASH_BLOCK_DATA_ORDER(c->h, c->data, 1);
|
|
n = HASH_CBLOCK - n;
|
|
data += n;
|
|
len -= n;
|
|
c->num = 0;
|
|
// Keep |c->data| zeroed when unused.
|
|
OPENSSL_memset(c->data, 0, HASH_CBLOCK);
|
|
} else {
|
|
OPENSSL_memcpy(c->data + n, data, len);
|
|
c->num += (unsigned)len;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
n = len / HASH_CBLOCK;
|
|
if (n > 0) {
|
|
HASH_BLOCK_DATA_ORDER(c->h, data, n);
|
|
n *= HASH_CBLOCK;
|
|
data += n;
|
|
len -= n;
|
|
}
|
|
|
|
if (len != 0) {
|
|
c->num = (unsigned)len;
|
|
OPENSSL_memcpy(c->data, data, len);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
void HASH_TRANSFORM(HASH_CTX *c, const uint8_t *data) {
|
|
HASH_BLOCK_DATA_ORDER(c->h, data, 1);
|
|
}
|
|
|
|
|
|
int HASH_FINAL(uint8_t *md, HASH_CTX *c) {
|
|
// |c->data| always has room for at least one byte. A full block would have
|
|
// been consumed.
|
|
size_t n = c->num;
|
|
assert(n < HASH_CBLOCK);
|
|
c->data[n] = 0x80;
|
|
n++;
|
|
|
|
// Fill the block with zeros if there isn't room for a 64-bit length.
|
|
if (n > (HASH_CBLOCK - 8)) {
|
|
OPENSSL_memset(c->data + n, 0, HASH_CBLOCK - n);
|
|
n = 0;
|
|
HASH_BLOCK_DATA_ORDER(c->h, c->data, 1);
|
|
}
|
|
OPENSSL_memset(c->data + n, 0, HASH_CBLOCK - 8 - n);
|
|
|
|
// Append a 64-bit length to the block and process it.
|
|
uint8_t *p = c->data + HASH_CBLOCK - 8;
|
|
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
|
|
HOST_l2c(c->Nh, p);
|
|
HOST_l2c(c->Nl, p);
|
|
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
|
|
HOST_l2c(c->Nl, p);
|
|
HOST_l2c(c->Nh, p);
|
|
#endif
|
|
assert(p == c->data + HASH_CBLOCK);
|
|
HASH_BLOCK_DATA_ORDER(c->h, c->data, 1);
|
|
c->num = 0;
|
|
OPENSSL_memset(c->data, 0, HASH_CBLOCK);
|
|
|
|
HASH_MAKE_STRING(c, md);
|
|
return 1;
|
|
}
|
|
|
|
|
|
#if defined(__cplusplus)
|
|
} // extern C
|
|
#endif
|