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minix/lib/libutil/sha2.c
Ben Gras 2a556de6d2 further sha2 conversion by Gautam Tirumala
2010-07-16 00:12:16 +00:00

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/* $NetBSD: sha2.c,v 1.7 2007/07/18 14:09:55 joerg Exp $ */
/* $KAME: sha2.c,v 1.9 2003/07/20 00:28:38 itojun Exp $ */
/*
* sha2.c
*
* Version 1.0.0beta1
*
* Written by Aaron D. Gifford <me@aarongifford.com>
*
* Copyright 2000 Aaron D. Gifford. 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. Neither the name of the copyright holder nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND
* ANY EXPRESS 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 AUTHOR(S) OR CONTRIBUTOR(S) 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 <sys/types.h>
/* #include <sys/time.h> */
/* #include <sys/systm.h> */
/* #include <machine/endian.h> */
#include <stdint.h>
#include <minix/sha2.h>
#include <assert.h>
/*
* ASSERT NOTE:
* Some sanity checking code is included using assert(). On my FreeBSD
* system, this additional code can be removed by compiling with NDEBUG
* defined. Check your own systems manpage on assert() to see how to
* compile WITHOUT the sanity checking code on your system.
*
* UNROLLED TRANSFORM LOOP NOTE:
* You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
* loop version for the hash transform rounds (defined using macros
* later in this file). Either define on the command line, for example:
*
* cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
*
* or define below:
*
* #define SHA2_UNROLL_TRANSFORM
*
*/
/*** SHA-256/384/512 Machine Architecture Definitions *****************/
/*
* SHA2_BYTE_ORDER NOTE:
*
* Please make sure that your system defines SHA2_BYTE_ORDER. If your
* architecture is little-endian, make sure it also defines
* SHA2_LITTLE_ENDIAN and that the two (SHA2_BYTE_ORDER and SHA2_LITTLE_ENDIAN) are
* equivilent.
*
* If your system does not define the above, then you can do so by
* hand like this:
*
* #define SHA2_LITTLE_ENDIAN 1234
* #define SHA2_BIG_ENDIAN 4321
*
* And for little-endian machines, add:
*
* #define SHA2_BYTE_ORDER SHA2_LITTLE_ENDIAN
*
* Or for big-endian machines:
*
* #define SHA2_BYTE_ORDER SHA2_BIG_ENDIAN
*
* The FreeBSD machine this was written on defines BYTE_ORDER
* appropriately by including <sys/types.h> (which in turn includes
* <machine/endian.h> where the appropriate definitions are actually
* made).
*/
#if !defined(SHA2_BYTE_ORDER) || (SHA2_BYTE_ORDER != SHA2_LITTLE_ENDIAN && SHA2_BYTE_ORDER != SHA2_BIG_ENDIAN)
#error Define SHA2_BYTE_ORDER to be equal to either SHA2_LITTLE_ENDIAN or SHA2_BIG_ENDIAN
#endif
#if 0 /*def SHA2_USE_INTTYPES_H*/
typedef uint8_t sha2_byte; /* Exactly 1 byte */
typedef uint32_t sha2_word32; /* Exactly 4 bytes */
typedef uint64_t sha2_word64; /* Exactly 8 bytes */
#else /* SHA2_USE_INTTYPES_H */
typedef u_int8_t sha2_byte; /* Exactly 1 byte */
typedef u_int32_t sha2_word32; /* Exactly 4 bytes */
typedef u_int64_t sha2_word64; /* Exactly 8 bytes */
#endif /* SHA2_USE_INTTYPES_H */
/*** SHA-256/384/512 Various Length Definitions ***********************/
/* NOTE: Most of these are in sha2.h */
#define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8)
#define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16)
#define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
/*** ENDIAN REVERSAL MACROS *******************************************/
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
#define REVERSE32(w,x) { \
sha2_word32 tmp = (w); \
tmp = (tmp >> 16) | (tmp << 16); \
(x) = (sha2_word32)(((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8)); \
}
#define REVERSE64(w,x) { \
sha2_word64 tmp = (w); \
tmp = (tmp >> 32) | (tmp << 32); \
tmp = (sha2_word64)(((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
((tmp & 0x00ff00ff00ff00ffULL) << 8)); \
(x) = (sha2_word64)(((tmp & 0xffff0000ffff0000ULL) >> 16) | \
((tmp & 0x0000ffff0000ffffULL) << 16)); \
}
#if MINIX_64BIT
#undef REVERSE64
#define REVERSE64(w,x) { \
sha2_word64 tmp64 = (w); \
u32_t hi, lo; \
REVERSE32(ex64hi(tmp64), lo); \
REVERSE32(ex64lo(tmp64), hi); \
(x) = make64(lo, hi); \
}
#endif /* MINIX_64BIT */
#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
/*
* Macro for incrementally adding the unsigned 64-bit integer n to the
* unsigned 128-bit integer (represented using a two-element array of
* 64-bit words):
*/
#define ADDINC128(w,n) { \
(w)[0] = add64u((w)[0], (n)); \
if (cmp64u((w)[0], (n)) < 0) { \
(w)[1] = add64u((w)[1], 1); \
} \
}
/*** THE SIX LOGICAL FUNCTIONS ****************************************/
/*
* Bit shifting and rotation (used by the six SHA-XYZ logical functions:
*
* NOTE: The naming of R and S appears backwards here (R is a SHIFT and
* S is a ROTATION) because the SHA-256/384/512 description document
* (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
* same "backwards" definition.
*/
/* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
#define R(b,x) ((x) >> (b))
/* 32-bit Rotate-right (used in SHA-256): */
#define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
#define S64(b,x) (rrotate64((x), (b)))
#define R64(b, x) (rshift64(x, b))
/* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define Ch64(x,y,z) (xor64(and64((x), (y)), and64(not64((x)), (z))))
#define Maj64(x,y,z) (xor64(xor64(and64((x), (y)), and64((x), (z))), and64((y), (z))))
/* Four of six logical functions used in SHA-256: */
#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
/* Four of six logical functions used in SHA-384 and SHA-512: */
#define Sigma0_512(x) (xor64(xor64(S64(28, (x)), S64(34, (x))), S64(39, (x))))
#define Sigma1_512(x) (xor64(xor64(S64(14, (x)), S64(18, (x))), S64(41, (x))))
#define sigma0_512(x) (xor64(xor64(S64( 1, (x)), S64( 8, (x))), R64( 7, (x))))
#define sigma1_512(x) (xor64(xor64(S64(19, (x)), S64(61, (x))), R64( 6, (x))))
/*** INTERNAL FUNCTION PROTOTYPES *************************************/
/* NOTE: These should not be accessed directly from outside this
* library -- they are intended for private internal visibility/use
* only.
*/
static void SHA512_Last(SHA512_CTX*);
void SHA256_Transform(SHA256_CTX*, const sha2_word32*);
void SHA384_Transform(SHA384_CTX*, const sha2_word64*);
void SHA512_Transform(SHA512_CTX*, const sha2_word64*);
/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
/* Hash constant words K for SHA-256: */
static const sha2_word32 K256[64] = {
0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
};
/* Initial hash value H for SHA-256: */
static const sha2_word32 sha256_initial_hash_value[8] = {
0x6a09e667UL,
0xbb67ae85UL,
0x3c6ef372UL,
0xa54ff53aUL,
0x510e527fUL,
0x9b05688cUL,
0x1f83d9abUL,
0x5be0cd19UL
};
/* Hash constant words K for SHA-384 and SHA-512: */
const static sha2_word64 K512[80] = {
{0xd728ae22UL, 0x428a2f98UL}, {0x23ef65cdUL, 0x71374491UL},
{0xec4d3b2fUL, 0xb5c0fbcfUL}, {0x8189dbbcUL, 0xe9b5dba5UL},
{0xf348b538UL, 0x3956c25bUL}, {0xb605d019UL, 0x59f111f1UL},
{0xaf194f9bUL, 0x923f82a4UL}, {0xda6d8118UL, 0xab1c5ed5UL},
{0xa3030242UL, 0xd807aa98UL}, {0x45706fbeUL, 0x12835b01UL},
{0x4ee4b28cUL, 0x243185beUL}, {0xd5ffb4e2UL, 0x550c7dc3UL},
{0xf27b896fUL, 0x72be5d74UL}, {0x3b1696b1UL, 0x80deb1feUL},
{0x25c71235UL, 0x9bdc06a7UL}, {0xcf692694UL, 0xc19bf174UL},
{0x9ef14ad2UL, 0xe49b69c1UL}, {0x384f25e3UL, 0xefbe4786UL},
{0x8b8cd5b5UL, 0x0fc19dc6UL}, {0x77ac9c65UL, 0x240ca1ccUL},
{0x592b0275UL, 0x2de92c6fUL}, {0x6ea6e483UL, 0x4a7484aaUL},
{0xbd41fbd4UL, 0x5cb0a9dcUL}, {0x831153b5UL, 0x76f988daUL},
{0xee66dfabUL, 0x983e5152UL}, {0x2db43210UL, 0xa831c66dUL},
{0x98fb213fUL, 0xb00327c8UL}, {0xbeef0ee4UL, 0xbf597fc7UL},
{0x3da88fc2UL, 0xc6e00bf3UL}, {0x930aa725UL, 0xd5a79147UL},
{0xe003826fUL, 0x06ca6351UL}, {0x0a0e6e70UL, 0x14292967UL},
{0x46d22ffcUL, 0x27b70a85UL}, {0x5c26c926UL, 0x2e1b2138UL},
{0x5ac42aedUL, 0x4d2c6dfcUL}, {0x9d95b3dfUL, 0x53380d13UL},
{0x8baf63deUL, 0x650a7354UL}, {0x3c77b2a8UL, 0x766a0abbUL},
{0x47edaee6UL, 0x81c2c92eUL}, {0x1482353bUL, 0x92722c85UL},
{0x4cf10364UL, 0xa2bfe8a1UL}, {0xbc423001UL, 0xa81a664bUL},
{0xd0f89791UL, 0xc24b8b70UL}, {0x0654be30UL, 0xc76c51a3UL},
{0xd6ef5218UL, 0xd192e819UL}, {0x5565a910UL, 0xd6990624UL},
{0x5771202aUL, 0xf40e3585UL}, {0x32bbd1b8UL, 0x106aa070UL},
{0xb8d2d0c8UL, 0x19a4c116UL}, {0x5141ab53UL, 0x1e376c08UL},
{0xdf8eeb99UL, 0x2748774cUL}, {0xe19b48a8UL, 0x34b0bcb5UL},
{0xc5c95a63UL, 0x391c0cb3UL}, {0xe3418acbUL, 0x4ed8aa4aUL},
{0x7763e373UL, 0x5b9cca4fUL}, {0xd6b2b8a3UL, 0x682e6ff3UL},
{0x5defb2fcUL, 0x748f82eeUL}, {0x43172f60UL, 0x78a5636fUL},
{0xa1f0ab72UL, 0x84c87814UL}, {0x1a6439ecUL, 0x8cc70208UL},
{0x23631e28UL, 0x90befffaUL}, {0xde82bde9UL, 0xa4506cebUL},
{0xb2c67915UL, 0xbef9a3f7UL}, {0xe372532bUL, 0xc67178f2UL},
{0xea26619cUL, 0xca273eceUL}, {0x21c0c207UL, 0xd186b8c7UL},
{0xcde0eb1eUL, 0xeada7dd6UL}, {0xee6ed178UL, 0xf57d4f7fUL},
{0x72176fbaUL, 0x06f067aaUL}, {0xa2c898a6UL, 0x0a637dc5UL},
{0xbef90daeUL, 0x113f9804UL}, {0x131c471bUL, 0x1b710b35UL},
{0x23047d84UL, 0x28db77f5UL}, {0x40c72493UL, 0x32caab7bUL},
{0x15c9bebcUL, 0x3c9ebe0aUL}, {0x9c100d4cUL, 0x431d67c4UL},
{0xcb3e42b6UL, 0x4cc5d4beUL}, {0xfc657e2aUL, 0x597f299cUL},
{0x3ad6faecUL, 0x5fcb6fabUL}, {0x4a475817UL, 0x6c44198cUL}
};
/* Initial hash value H for SHA-384 */
const static sha2_word64 sha384_initial_hash_value[8] = {
{0xc1059ed8UL, 0xcbbb9d5dUL},
{0x367cd507UL, 0x629a292aUL},
{0x3070dd17UL, 0x9159015aUL},
{0xf70e5939UL, 0x152fecd8UL},
{0xffc00b31UL, 0x67332667UL},
{0x68581511UL, 0x8eb44a87UL},
{0x64f98fa7UL, 0xdb0c2e0dUL},
{0xbefa4fa4UL, 0x47b5481dUL}
};
const static sha2_word64 sha512_initial_hash_value[8] = {
{0xf3bcc908UL, 0x6a09e667UL},
{0x84caa73bUL, 0xbb67ae85UL},
{0xfe94f82bUL, 0x3c6ef372UL},
{0x5f1d36f1UL, 0xa54ff53aUL},
{0xade682d1UL, 0x510e527fUL},
{0x2b3e6c1fUL, 0x9b05688cUL},
{0xfb41bd6bUL, 0x1f83d9abUL},
{0x137e2179UL, 0x5be0cd19UL}
};
/*** SHA-256: *********************************************************/
void SHA256_Init(SHA256_CTX* context) {
if (context == (SHA256_CTX*)0) {
return;
}
memcpy(context->state, sha256_initial_hash_value, (size_t)(SHA256_DIGEST_LENGTH));
memset(context->buffer, 0, (size_t)(SHA256_BLOCK_LENGTH));
context->bitcount = cvu64(0);
}
#ifdef SHA2_UNROLL_TRANSFORM
/* Unrolled SHA-256 round macros: */
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
REVERSE32(*data++, W256[j]); \
T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
K256[j] + W256[j]; \
(d) += T1; \
(h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
j++
#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
K256[j] + (W256[j] = *data++); \
(d) += T1; \
(h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
j++
#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
#define ROUND256(a,b,c,d,e,f,g,h) \
s0 = W256[(j+1)&0x0f]; \
s0 = sigma0_256(s0); \
s1 = W256[(j+14)&0x0f]; \
s1 = sigma1_256(s1); \
T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \
(W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
(d) += T1; \
(h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
j++
void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
sha2_word32 T1, *W256;
int j;
W256 = (sha2_word32*)context->buffer;
/* Initialize registers with the prev. intermediate value */
a = context->state[0];
b = context->state[1];
c = context->state[2];
d = context->state[3];
e = context->state[4];
f = context->state[5];
g = context->state[6];
h = context->state[7];
j = 0;
do {
/* Rounds 0 to 15 (unrolled): */
ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
} while (j < 16);
/* Now for the remaining rounds to 64: */
do {
ROUND256(a,b,c,d,e,f,g,h);
ROUND256(h,a,b,c,d,e,f,g);
ROUND256(g,h,a,b,c,d,e,f);
ROUND256(f,g,h,a,b,c,d,e);
ROUND256(e,f,g,h,a,b,c,d);
ROUND256(d,e,f,g,h,a,b,c);
ROUND256(c,d,e,f,g,h,a,b);
ROUND256(b,c,d,e,f,g,h,a);
} while (j < 64);
/* Compute the current intermediate hash value */
context->state[0] += a;
context->state[1] += b;
context->state[2] += c;
context->state[3] += d;
context->state[4] += e;
context->state[5] += f;
context->state[6] += g;
context->state[7] += h;
/* Clean up */
a = b = c = d = e = f = g = h = T1 = 0;
}
#else /* SHA2_UNROLL_TRANSFORM */
void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
sha2_word32 T1, T2, *W256;
int j;
W256 = (sha2_word32*)(void *)context->buffer;
/* Initialize registers with the prev. intermediate value */
a = context->state[0];
b = context->state[1];
c = context->state[2];
d = context->state[3];
e = context->state[4];
f = context->state[5];
g = context->state[6];
h = context->state[7];
j = 0;
do {
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
/* Copy data while converting to host byte order */
REVERSE32(*data++,W256[j]);
/* Apply the SHA-256 compression function to update a..h */
T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
/* Apply the SHA-256 compression function to update a..h with copy */
T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++);
#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
T2 = Sigma0_256(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
j++;
} while (j < 16);
do {
/* Part of the message block expansion: */
s0 = W256[(j+1)&0x0f];
s0 = sigma0_256(s0);
s1 = W256[(j+14)&0x0f];
s1 = sigma1_256(s1);
/* Apply the SHA-256 compression function to update a..h */
T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
(W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
T2 = Sigma0_256(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
j++;
} while (j < 64);
/* Compute the current intermediate hash value */
context->state[0] += a;
context->state[1] += b;
context->state[2] += c;
context->state[3] += d;
context->state[4] += e;
context->state[5] += f;
context->state[6] += g;
context->state[7] += h;
/* Clean up */
a = b = c = d = e = f = g = h = T1 = T2 = 0;
}
#endif /* SHA2_UNROLL_TRANSFORM */
void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
unsigned int freespace, usedspace;
if (len == 0) {
/* Calling with no data is valid - we do nothing */
return;
}
/* Sanity check: */
assert(context != (SHA256_CTX*)0 && data != (sha2_byte*)0);
#if MINIX_64BIT
usedspace= rem64u(context->bitcount, SHA256_BLOCK_LENGTH*8)/8;
#else /* !MINIX_64BIT */
usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
#endif /* MINIX_64BIT */
if (usedspace > 0) {
/* Calculate how much free space is available in the buffer */
freespace = SHA256_BLOCK_LENGTH - usedspace;
if (len >= freespace) {
/* Fill the buffer completely and process it */
memcpy(&context->buffer[usedspace], data, (size_t)(freespace));
#if MINIX_64BIT
context->bitcount= add64u(context->bitcount,
freespace << 3);
#else /* !MINIX_64BIT */
context->bitcount += freespace << 3;
#endif /* MINIX_64BIT */
len -= freespace;
data += freespace;
SHA256_Transform(context, (sha2_word32*)(void *)context->buffer);
} else {
/* The buffer is not yet full */
memcpy(&context->buffer[usedspace], data, len);
#if MINIX_64BIT
context->bitcount= add64u(context->bitcount, len << 3);
#else /* !MINIX_64BIT */
context->bitcount += len << 3;
#endif /* MINIX_64BIT */
/* Clean up: */
usedspace = freespace = 0;
return;
}
}
/*
* Process as many complete blocks as possible.
*
* Check alignment of the data pointer. If it is 32bit aligned,
* SHA256_Transform can be called directly on the data stream,
* otherwise enforce the alignment by copy into the buffer.
*/
if ((uintptr_t)data % 4 == 0) {
while (len >= SHA256_BLOCK_LENGTH) {
SHA256_Transform(context,
(const sha2_word32 *)(const void *)data);
#if MINIX_64BIT
context->bitcount= add64u(context->bitcount,
SHA256_BLOCK_LENGTH << 3);
#else /* !MINIX_64BIT */
context->bitcount += SHA256_BLOCK_LENGTH << 3;
#endif /* !MINIX_64BIT */
len -= SHA256_BLOCK_LENGTH;
data += SHA256_BLOCK_LENGTH;
}
} else {
while (len >= SHA256_BLOCK_LENGTH) {
memcpy(context->buffer, data, SHA256_BLOCK_LENGTH);
SHA256_Transform(context,
(const sha2_word32 *)(const void *)context->buffer);
#if MINIX_64BIT
context->bitcount= add64u(context->bitcount,
SHA256_BLOCK_LENGTH << 3);
#else /* !MINIX_64BIT */
context->bitcount += SHA256_BLOCK_LENGTH << 3;
#endif /* MINIX_64BIT */
len -= SHA256_BLOCK_LENGTH;
data += SHA256_BLOCK_LENGTH;
}
}
if (len > 0) {
/* There's left-overs, so save 'em */
memcpy(context->buffer, data, len);
#if MINIX_64BIT
context->bitcount= add64u(context->bitcount, len << 3);
#else /* !MINIX_64BIT */
context->bitcount += len << 3;
#endif /* MINIX_64BIT */
}
/* Clean up: */
usedspace = freespace = 0;
}
void SHA256_Final(sha2_byte digest[], SHA256_CTX* context) {
sha2_word32 *d = (void *)digest;
unsigned int usedspace;
/* Sanity check: */
assert(context != (SHA256_CTX*)0);
/* If no digest buffer is passed, we don't bother doing this: */
if (digest != (sha2_byte*)0) {
#if MINIX_64BIT
usedspace= rem64u(context->bitcount, SHA256_BLOCK_LENGTH*8)/8;
#else /* !MINIX_64BIT */
usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
#endif /* MINIX_64BIT */
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
/* Convert FROM host byte order */
REVERSE64(context->bitcount,context->bitcount);
#endif
if (usedspace > 0) {
/* Begin padding with a 1 bit: */
context->buffer[usedspace++] = 0x80;
if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
/* Set-up for the last transform: */
memset(&context->buffer[usedspace], 0, (size_t)(SHA256_SHORT_BLOCK_LENGTH - usedspace));
} else {
if (usedspace < SHA256_BLOCK_LENGTH) {
memset(&context->buffer[usedspace], 0, (size_t)(SHA256_BLOCK_LENGTH - usedspace));
}
/* Do second-to-last transform: */
SHA256_Transform(context, (sha2_word32*)(void *)context->buffer);
/* And set-up for the last transform: */
memset(context->buffer, 0, (size_t)(SHA256_SHORT_BLOCK_LENGTH));
}
} else {
/* Set-up for the last transform: */
memset(context->buffer, 0, (size_t)(SHA256_SHORT_BLOCK_LENGTH));
/* Begin padding with a 1 bit: */
*context->buffer = 0x80;
}
/* Set the bit count: */
*(sha2_word64*)(void *)&context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount;
/* Final transform: */
SHA256_Transform(context, (sha2_word32*)(void *)context->buffer);
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
{
/* Convert TO host byte order */
int j;
for (j = 0; j < 8; j++) {
REVERSE32(context->state[j],context->state[j]);
*d++ = context->state[j];
}
}
#else
memcpy(d, context->state, SHA256_DIGEST_LENGTH);
#endif
}
/* Clean up state data: */
memset(context, 0, sizeof(*context));
usedspace = 0;
}
/*** SHA-512: *********************************************************/
void SHA512_Init(SHA512_CTX* context) {
if (context == (SHA512_CTX*)0) {
return;
}
memcpy(context->state, sha512_initial_hash_value, (size_t)(SHA512_DIGEST_LENGTH));
memset(context->buffer, 0, (size_t)(SHA512_BLOCK_LENGTH));
make_zero64(context->bitcount[0]);
make_zero64(context->bitcount[1]);
}
#ifdef SHA2_UNROLL_TRANSFORM
/* Unrolled SHA-512 round macros: */
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
REVERSE64(*data++, W512[j]); \
T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
K512[j] + W512[j]; \
(d) += T1, \
(h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \
j++
#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
K512[j] + (W512[j] = *data++); \
(d) += T1; \
(h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
j++
#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
#define ROUND512(a,b,c,d,e,f,g,h) \
s0 = W512[(j+1)&0x0f]; \
s0 = sigma0_512(s0); \
s1 = W512[(j+14)&0x0f]; \
s1 = sigma1_512(s1); \
T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \
(W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
(d) += T1; \
(h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
j++
void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
sha2_word64 T1, *W512 = (sha2_word64*)context->buffer;
int j;
/* Initialize registers with the prev. intermediate value */
a = context->state[0];
b = context->state[1];
c = context->state[2];
d = context->state[3];
e = context->state[4];
f = context->state[5];
g = context->state[6];
h = context->state[7];
j = 0;
do {
ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
} while (j < 16);
/* Now for the remaining rounds up to 79: */
do {
ROUND512(a,b,c,d,e,f,g,h);
ROUND512(h,a,b,c,d,e,f,g);
ROUND512(g,h,a,b,c,d,e,f);
ROUND512(f,g,h,a,b,c,d,e);
ROUND512(e,f,g,h,a,b,c,d);
ROUND512(d,e,f,g,h,a,b,c);
ROUND512(c,d,e,f,g,h,a,b);
ROUND512(b,c,d,e,f,g,h,a);
} while (j < 80);
/* Compute the current intermediate hash value */
context->state[0] += a;
context->state[1] += b;
context->state[2] += c;
context->state[3] += d;
context->state[4] += e;
context->state[5] += f;
context->state[6] += g;
context->state[7] += h;
/* Clean up */
a = b = c = d = e = f = g = h = T1 = 0;
}
#else /* SHA2_UNROLL_TRANSFORM */
void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
sha2_word64 T1, T2, *W512 = (void *)context->buffer;
int j;
/* Initialize registers with the prev. intermediate value */
a = context->state[0];
b = context->state[1];
c = context->state[2];
d = context->state[3];
e = context->state[4];
f = context->state[5];
g = context->state[6];
h = context->state[7];
j = 0;
do {
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
/* Convert TO host byte order */
REVERSE64(*data++, W512[j]);
#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
W512[j] = *data++;
#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
/* Apply the SHA-512 compression function to update a..h */
T1 = add64(add64(add64(add64(h, Sigma1_512(e)), Ch64(e, f, g)), K512[j]), W512[j]);
T2 = add64(Sigma0_512(a), Maj64(a, b, c));
h = g;
g = f;
f = e;
e = add64(d, T1);
d = c;
c = b;
b = a;
a = add64(T1, T2);
j++;
} while (j < 16);
do {
/* Part of the message block expansion: */
s0 = W512[(j+1)&0x0f];
s0 = sigma0_512(s0);
s1 = W512[(j+14)&0x0f];
s1 = sigma1_512(s1);
/* Apply the SHA-512 compression function to update a..h */
W512[j&0x0f] = add64(add64(add64(W512[j&0x0f], s1), W512[(j+9)&0x0f]), s0);
T1 = add64(add64(add64(add64(h, Sigma1_512(e)), Ch64(e, f, g)), K512[j]), W512[j&0x0f]);
T2 = add64(Sigma0_512(a), Maj64(a, b, c));
h = g;
g = f;
f = e;
e = add64(d, T1);
d = c;
c = b;
b = a;
a = add64(T1, T2);
j++;
} while (j < 80);
/* Compute the current intermediate hash value */
context->state[0] = add64(context->state[0], a);
context->state[1] = add64(context->state[1], b);
context->state[2] = add64(context->state[2], c);
context->state[3] = add64(context->state[3], d);
context->state[4] = add64(context->state[4], e);
context->state[5] = add64(context->state[5], f);
context->state[6] = add64(context->state[6], g);
context->state[7] = add64(context->state[7], h);
/* Clean up */
a = b = c = d = e = f = g = h = T1 = T2 = cvu64(0);
}
#endif /* SHA2_UNROLL_TRANSFORM */
void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
unsigned int freespace, usedspace;
if (len == 0) {
/* Calling with no data is valid - we do nothing */
return;
}
/* Sanity check: */
assert(context != (SHA512_CTX*)0 && data != (sha2_byte*)0);
usedspace = (unsigned int)rem64u(rshift64(context->bitcount[0], 3), SHA512_BLOCK_LENGTH);
if (usedspace > 0) {
/* Calculate how much free space is available in the buffer */
freespace = SHA512_BLOCK_LENGTH - usedspace;
if (len >= freespace) {
/* Fill the buffer completely and process it */
memcpy(&context->buffer[usedspace], data, (size_t)(freespace));
ADDINC128(context->bitcount, freespace << 3);
len -= freespace;
data += freespace;
SHA512_Transform(context, (sha2_word64*)(void *)context->buffer);
} else {
/* The buffer is not yet full */
memcpy(&context->buffer[usedspace], data, len);
ADDINC128(context->bitcount, len << 3);
/* Clean up: */
usedspace = freespace = 0;
return;
}
}
/*
* Process as many complete blocks as possible.
*
* Check alignment of the data pointer. If it is 64bit aligned,
* SHA512_Transform can be called directly on the data stream,
* otherwise enforce the alignment by copy into the buffer.
*/
if ((uintptr_t)data % 8 == 0) {
while (len >= SHA512_BLOCK_LENGTH) {
SHA512_Transform(context,
(const sha2_word64 *)(const void *)data);
ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
len -= SHA512_BLOCK_LENGTH;
data += SHA512_BLOCK_LENGTH;
}
} else {
while (len >= SHA512_BLOCK_LENGTH) {
memcpy(context->buffer, data, SHA512_BLOCK_LENGTH);
SHA512_Transform(context,
(const sha2_word64 *)(void *)context->buffer);
ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
len -= SHA512_BLOCK_LENGTH;
data += SHA512_BLOCK_LENGTH;
}
}
if (len > 0) {
/* There's left-overs, so save 'em */
memcpy(context->buffer, data, len);
ADDINC128(context->bitcount, len << 3);
}
/* Clean up: */
usedspace = freespace = 0;
}
static void SHA512_Last(SHA512_CTX* context) {
unsigned int usedspace;
usedspace = rem64u(rshift64(context->bitcount[0], 3), SHA512_BLOCK_LENGTH);
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
/* Convert FROM host byte order */
REVERSE64(context->bitcount[0],context->bitcount[0]);
REVERSE64(context->bitcount[1],context->bitcount[1]);
#endif
if (usedspace > 0) {
/* Begin padding with a 1 bit: */
context->buffer[usedspace++] = 0x80;
if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
/* Set-up for the last transform: */
memset(&context->buffer[usedspace], 0, (size_t)(SHA512_SHORT_BLOCK_LENGTH - usedspace));
} else {
if (usedspace < SHA512_BLOCK_LENGTH) {
memset(&context->buffer[usedspace], 0, (size_t)(SHA512_BLOCK_LENGTH - usedspace));
}
/* Do second-to-last transform: */
SHA512_Transform(context, (sha2_word64*)(void *)context->buffer);
/* And set-up for the last transform: */
memset(context->buffer, 0, (size_t)(SHA512_BLOCK_LENGTH - 2));
}
} else {
/* Prepare for final transform: */
memset(context->buffer, 0, (size_t)(SHA512_SHORT_BLOCK_LENGTH));
/* Begin padding with a 1 bit: */
*context->buffer = 0x80;
}
/* Store the length of input data (in bits): */
*(sha2_word64*)(void *)&context->buffer[SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
*(sha2_word64*)(void *)&context->buffer[SHA512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0];
/* Final transform: */
SHA512_Transform(context, (sha2_word64*)(void *)context->buffer);
}
void SHA512_Final(sha2_byte digest[], SHA512_CTX* context) {
sha2_word64 *d = (void *)digest;
/* Sanity check: */
assert(context != (SHA512_CTX*)0);
/* If no digest buffer is passed, we don't bother doing this: */
if (digest != (sha2_byte*)0) {
SHA512_Last(context);
/* Save the hash data for output: */
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
{
/* Convert TO host byte order */
int j;
for (j = 0; j < 8; j++) {
REVERSE64(context->state[j],context->state[j]);
*d++ = context->state[j];
}
}
#else
memcpy(d, context->state, SHA512_DIGEST_LENGTH);
#endif
}
/* Zero out state data */
memset(context, 0, sizeof(*context));
}
/*** SHA-384: *********************************************************/
void SHA384_Init(SHA384_CTX* context) {
if (context == (SHA384_CTX*)0) {
return;
}
memcpy(context->state, sha384_initial_hash_value, (size_t)(SHA512_DIGEST_LENGTH));
memset(context->buffer, 0, (size_t)(SHA384_BLOCK_LENGTH));
make_zero64(context->bitcount[0]);
make_zero64(context->bitcount[1]);
}
void SHA384_Update(SHA384_CTX* context, const sha2_byte* data, size_t len) {
SHA512_Update((SHA512_CTX*)context, data, len);
}
void SHA384_Transform(SHA512_CTX* context, const sha2_word64* data) {
SHA512_Transform((SHA512_CTX*)context, data);
}
void SHA384_Final(sha2_byte digest[], SHA384_CTX* context) {
sha2_word64 *d = (void *)digest;
/* Sanity check: */
assert(context != (SHA384_CTX*)0);
/* If no digest buffer is passed, we don't bother doing this: */
if (digest != (sha2_byte*)0) {
SHA512_Last((SHA512_CTX*)context);
/* Save the hash data for output: */
#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
{
/* Convert TO host byte order */
int j;
for (j = 0; j < 6; j++) {
REVERSE64(context->state[j],context->state[j]);
*d++ = context->state[j];
}
}
#else
memcpy(d, context->state, SHA384_DIGEST_LENGTH);
#endif
}
/* Zero out state data */
memset(context, 0, sizeof(*context));
}
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