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/*
* SHA-256 hash in x86 assembly
*
* Copyright (c) 2017 Project Nayuki. (MIT License)
* https://www.nayuki.io/page/fast-sha2-hashes-in-x86-assembly
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
* - The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* - The Software is provided "as is", without warranty of any kind, express or
* implied, including but not limited to the warranties of merchantability,
* fitness for a particular purpose and noninfringement. In no event shall the
* authors or copyright holders be liable for any claim, damages or other
* liability, whether in an action of contract, tort or otherwise, arising from,
* out of or in connection with the Software or the use or other dealings in the
* Software.
*/
/* void sha256_compress(uint32_t state[static 8], const uint8_t block[static 64]) */
.globl sha256_compress
sha256_compress:
/*
* Storage usage:
* Bytes Location Description
* 4 eax Temporary for calculation per round
* 4 ebx Temporary for calculation per round
* 4 ecx Temporary for calculation per round
* 4 edx Temporary for calculation per round
* 4 ebp Temporary for calculation per round
* 4 esi (During state loading and update) base address of state array argument
* (During hash rounds) temporary for calculation per round
* 4 edi Base address of block array argument (during key schedule loading rounds only)
* 4 esp x86 stack pointer
* 32 [esp+ 0] SHA-256 state variables A,B,C,D,E,F,G,H (4 bytes each)
* 64 [esp+ 32] Key schedule of 16 * 4 bytes
* 4 [esp+ 96] Caller's value of ebx
* 4 [esp+100] Caller's value of esi
* 4 [esp+104] Caller's value of edi
* 4 [esp+108] Caller's value of ebp
*/
#define SCHED(i) ((((i)&0xF)+8)*4)(%esp)
#define ROUNDa(i, a, b, c, d, e, f, g, h, k) \
movl (i*4)(%edi), %ebp; \
bswapl %ebp; \
movl %ebp, SCHED(i); \
ROUNDTAIL(i, a, b, c, d, e, f, g, h, k)
#define ROUNDb(i, a, b, c, d, e, f, g, h, k) \
movl SCHED(i-15), %eax; \
movl SCHED(i-16), %ebp; \
movl %eax, %ebx; \
addl SCHED(i- 7), %ebp; \
movl %eax, %ecx; \
rorl $18, %ebx; \
shrl $3, %ecx; \
rorl $7, %eax; \
xorl %ecx, %ebx; \
xorl %ebx, %eax; \
addl %eax, %ebp; \
movl SCHED(i- 2), %eax; \
movl %eax, %ebx; \
movl %eax, %ecx; \
rorl $19, %ebx; \
shrl $10, %ecx; \
rorl $17, %eax; \
xorl %ecx, %ebx; \
xorl %ebx, %eax; \
addl %eax, %ebp; \
movl %ebp, SCHED(i); \
ROUNDTAIL(i, a, b, c, d, e, f, g, h, k)
#define STATE(i) (i*4)(%esp)
#define ROUNDTAIL(i, a, b, c, d, e, f, g, h, k) \
/* Part 0 */ \
movl STATE(e), %eax; \
movl %eax, %ebx; \
movl %eax, %ecx; \
movl %eax, %edx; \
rorl $11, %eax; \
rorl $25, %ebx; \
rorl $6, %ecx; \
movl STATE(h), %esi; \
xorl %ebx, %eax; \
xorl %eax, %ecx; \
addl %ebp, %esi; \
movl STATE(g), %ebx; \
movl STATE(f), %eax; \
xorl %ebx, %eax; \
andl %edx, %eax; \
xorl %ebx, %eax; \
leal k(%ecx,%eax), %ecx; \
addl %ecx, %esi; \
/* Part 1 */ \
addl %esi, STATE(d); \
/* Part 2 */ \
movl STATE(a), %eax; \
movl %eax, %ebx; \
movl %eax, %ecx; \
movl %eax, %edx; \
rorl $13, %eax; \
rorl $22, %ebx; \
rorl $2, %ecx; \
xorl %ebx, %eax; \
xorl %eax, %ecx; \
movl STATE(c), %eax; \
addl %ecx, %esi; \
movl %eax, %ecx; \
movl STATE(b), %ebx; \
orl %ebx, %ecx; \
andl %ebx, %eax; \
andl %edx, %ecx; \
orl %eax, %ecx; \
addl %ecx, %esi; \
movl %esi, STATE(h);
/* Allocate scratch space, save registers */
subl $112, %esp
movl %ebx, 96(%esp)
movl %esi, 100(%esp)
movl %edi, 104(%esp)
movl %ebp, 108(%esp)
/* Copy state */
movl 116(%esp), %esi /* Argument: state */
movl 0(%esi), %eax; movl %eax, 0(%esp)
movl 4(%esi), %eax; movl %eax, 4(%esp)
movl 8(%esi), %eax; movl %eax, 8(%esp)
movl 12(%esi), %eax; movl %eax, 12(%esp)
movl 16(%esi), %eax; movl %eax, 16(%esp)
movl 20(%esi), %eax; movl %eax, 20(%esp)
movl 24(%esi), %eax; movl %eax, 24(%esp)
movl 28(%esi), %eax; movl %eax, 28(%esp)
/* Do 64 rounds of hashing */
movl 120(%esp), %edi /* Argument: block */
ROUNDa( 0, 0, 1, 2, 3, 4, 5, 6, 7, 0x428A2F98)
ROUNDa( 1, 7, 0, 1, 2, 3, 4, 5, 6, 0x71374491)
ROUNDa( 2, 6, 7, 0, 1, 2, 3, 4, 5, 0xB5C0FBCF)
ROUNDa( 3, 5, 6, 7, 0, 1, 2, 3, 4, 0xE9B5DBA5)
ROUNDa( 4, 4, 5, 6, 7, 0, 1, 2, 3, 0x3956C25B)
ROUNDa( 5, 3, 4, 5, 6, 7, 0, 1, 2, 0x59F111F1)
ROUNDa( 6, 2, 3, 4, 5, 6, 7, 0, 1, 0x923F82A4)
ROUNDa( 7, 1, 2, 3, 4, 5, 6, 7, 0, 0xAB1C5ED5)
ROUNDa( 8, 0, 1, 2, 3, 4, 5, 6, 7, 0xD807AA98)
ROUNDa( 9, 7, 0, 1, 2, 3, 4, 5, 6, 0x12835B01)
ROUNDa(10, 6, 7, 0, 1, 2, 3, 4, 5, 0x243185BE)
ROUNDa(11, 5, 6, 7, 0, 1, 2, 3, 4, 0x550C7DC3)
ROUNDa(12, 4, 5, 6, 7, 0, 1, 2, 3, 0x72BE5D74)
ROUNDa(13, 3, 4, 5, 6, 7, 0, 1, 2, 0x80DEB1FE)
ROUNDa(14, 2, 3, 4, 5, 6, 7, 0, 1, 0x9BDC06A7)
ROUNDa(15, 1, 2, 3, 4, 5, 6, 7, 0, 0xC19BF174)
ROUNDb(16, 0, 1, 2, 3, 4, 5, 6, 7, 0xE49B69C1)
ROUNDb(17, 7, 0, 1, 2, 3, 4, 5, 6, 0xEFBE4786)
ROUNDb(18, 6, 7, 0, 1, 2, 3, 4, 5, 0x0FC19DC6)
ROUNDb(19, 5, 6, 7, 0, 1, 2, 3, 4, 0x240CA1CC)
ROUNDb(20, 4, 5, 6, 7, 0, 1, 2, 3, 0x2DE92C6F)
ROUNDb(21, 3, 4, 5, 6, 7, 0, 1, 2, 0x4A7484AA)
ROUNDb(22, 2, 3, 4, 5, 6, 7, 0, 1, 0x5CB0A9DC)
ROUNDb(23, 1, 2, 3, 4, 5, 6, 7, 0, 0x76F988DA)
ROUNDb(24, 0, 1, 2, 3, 4, 5, 6, 7, 0x983E5152)
ROUNDb(25, 7, 0, 1, 2, 3, 4, 5, 6, 0xA831C66D)
ROUNDb(26, 6, 7, 0, 1, 2, 3, 4, 5, 0xB00327C8)
ROUNDb(27, 5, 6, 7, 0, 1, 2, 3, 4, 0xBF597FC7)
ROUNDb(28, 4, 5, 6, 7, 0, 1, 2, 3, 0xC6E00BF3)
ROUNDb(29, 3, 4, 5, 6, 7, 0, 1, 2, 0xD5A79147)
ROUNDb(30, 2, 3, 4, 5, 6, 7, 0, 1, 0x06CA6351)
ROUNDb(31, 1, 2, 3, 4, 5, 6, 7, 0, 0x14292967)
ROUNDb(32, 0, 1, 2, 3, 4, 5, 6, 7, 0x27B70A85)
ROUNDb(33, 7, 0, 1, 2, 3, 4, 5, 6, 0x2E1B2138)
ROUNDb(34, 6, 7, 0, 1, 2, 3, 4, 5, 0x4D2C6DFC)
ROUNDb(35, 5, 6, 7, 0, 1, 2, 3, 4, 0x53380D13)
ROUNDb(36, 4, 5, 6, 7, 0, 1, 2, 3, 0x650A7354)
ROUNDb(37, 3, 4, 5, 6, 7, 0, 1, 2, 0x766A0ABB)
ROUNDb(38, 2, 3, 4, 5, 6, 7, 0, 1, 0x81C2C92E)
ROUNDb(39, 1, 2, 3, 4, 5, 6, 7, 0, 0x92722C85)
ROUNDb(40, 0, 1, 2, 3, 4, 5, 6, 7, 0xA2BFE8A1)
ROUNDb(41, 7, 0, 1, 2, 3, 4, 5, 6, 0xA81A664B)
ROUNDb(42, 6, 7, 0, 1, 2, 3, 4, 5, 0xC24B8B70)
ROUNDb(43, 5, 6, 7, 0, 1, 2, 3, 4, 0xC76C51A3)
ROUNDb(44, 4, 5, 6, 7, 0, 1, 2, 3, 0xD192E819)
ROUNDb(45, 3, 4, 5, 6, 7, 0, 1, 2, 0xD6990624)
ROUNDb(46, 2, 3, 4, 5, 6, 7, 0, 1, 0xF40E3585)
ROUNDb(47, 1, 2, 3, 4, 5, 6, 7, 0, 0x106AA070)
ROUNDb(48, 0, 1, 2, 3, 4, 5, 6, 7, 0x19A4C116)
ROUNDb(49, 7, 0, 1, 2, 3, 4, 5, 6, 0x1E376C08)
ROUNDb(50, 6, 7, 0, 1, 2, 3, 4, 5, 0x2748774C)
ROUNDb(51, 5, 6, 7, 0, 1, 2, 3, 4, 0x34B0BCB5)
ROUNDb(52, 4, 5, 6, 7, 0, 1, 2, 3, 0x391C0CB3)
ROUNDb(53, 3, 4, 5, 6, 7, 0, 1, 2, 0x4ED8AA4A)
ROUNDb(54, 2, 3, 4, 5, 6, 7, 0, 1, 0x5B9CCA4F)
ROUNDb(55, 1, 2, 3, 4, 5, 6, 7, 0, 0x682E6FF3)
ROUNDb(56, 0, 1, 2, 3, 4, 5, 6, 7, 0x748F82EE)
ROUNDb(57, 7, 0, 1, 2, 3, 4, 5, 6, 0x78A5636F)
ROUNDb(58, 6, 7, 0, 1, 2, 3, 4, 5, 0x84C87814)
ROUNDb(59, 5, 6, 7, 0, 1, 2, 3, 4, 0x8CC70208)
ROUNDb(60, 4, 5, 6, 7, 0, 1, 2, 3, 0x90BEFFFA)
ROUNDb(61, 3, 4, 5, 6, 7, 0, 1, 2, 0xA4506CEB)
ROUNDb(62, 2, 3, 4, 5, 6, 7, 0, 1, 0xBEF9A3F7)
ROUNDb(63, 1, 2, 3, 4, 5, 6, 7, 0, 0xC67178F2)
/* Add to state */
movl 116(%esp), %esi /* Argument: state */
movl 0(%esp), %eax; addl %eax, 0(%esi)
movl 4(%esp), %eax; addl %eax, 4(%esi)
movl 8(%esp), %eax; addl %eax, 8(%esi)
movl 12(%esp), %eax; addl %eax, 12(%esi)
movl 16(%esp), %eax; addl %eax, 16(%esi)
movl 20(%esp), %eax; addl %eax, 20(%esi)
movl 24(%esp), %eax; addl %eax, 24(%esi)
movl 28(%esp), %eax; addl %eax, 28(%esi)
/* Restore registers */
movl 96(%esp), %ebx
movl 100(%esp), %esi
movl 104(%esp), %edi
movl 108(%esp), %ebp
addl $112, %esp
retl
|
