| // Copyright 2013 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // SHA256 block routine. See sha256block.go for Go equivalent. |
| // |
| // The algorithm is detailed in FIPS 180-4: |
| // |
| // http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf |
| // |
| // Wt = Mt; for 0 <= t <= 15 |
| // Wt = SIGMA1(Wt-2) + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63 |
| // |
| // a = H0 |
| // b = H1 |
| // c = H2 |
| // d = H3 |
| // e = H4 |
| // f = H5 |
| // g = H6 |
| // h = H7 |
| // |
| // for t = 0 to 63 { |
| // T1 = h + BIGSIGMA1(e) + Ch(e,f,g) + Kt + Wt |
| // T2 = BIGSIGMA0(a) + Maj(a,b,c) |
| // h = g |
| // g = f |
| // f = e |
| // e = d + T1 |
| // d = c |
| // c = b |
| // b = a |
| // a = T1 + T2 |
| // } |
| // |
| // H0 = a + H0 |
| // H1 = b + H1 |
| // H2 = c + H2 |
| // H3 = d + H3 |
| // H4 = e + H4 |
| // H5 = f + H5 |
| // H6 = g + H6 |
| // H7 = h + H7 |
| |
| // Wt = Mt; for 0 <= t <= 15 |
| #define MSGSCHEDULE0(index) \ |
| MOVL (index*4)(SI), AX; \ |
| BSWAPL AX; \ |
| MOVL AX, (index*4)(BP) |
| |
| // Wt = SIGMA1(Wt-2) + Wt-7 + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63 |
| // SIGMA0(x) = ROTR(7,x) XOR ROTR(18,x) XOR SHR(3,x) |
| // SIGMA1(x) = ROTR(17,x) XOR ROTR(19,x) XOR SHR(10,x) |
| #define MSGSCHEDULE1(index) \ |
| MOVL ((index-2)*4)(BP), AX; \ |
| MOVL AX, CX; \ |
| RORL $17, AX; \ |
| MOVL CX, DX; \ |
| RORL $19, CX; \ |
| SHRL $10, DX; \ |
| MOVL ((index-15)*4)(BP), BX; \ |
| XORL CX, AX; \ |
| MOVL BX, CX; \ |
| XORL DX, AX; \ |
| RORL $7, BX; \ |
| MOVL CX, DX; \ |
| SHRL $3, DX; \ |
| RORL $18, CX; \ |
| ADDL ((index-7)*4)(BP), AX; \ |
| XORL CX, BX; \ |
| XORL DX, BX; \ |
| ADDL ((index-16)*4)(BP), BX; \ |
| ADDL BX, AX; \ |
| MOVL AX, ((index)*4)(BP) |
| |
| // Calculate T1 in AX - uses AX, BX, CX and DX registers. |
| // Wt is passed in AX. |
| // T1 = h + BIGSIGMA1(e) + Ch(e, f, g) + Kt + Wt |
| // BIGSIGMA1(x) = ROTR(6,x) XOR ROTR(11,x) XOR ROTR(25,x) |
| // Ch(x, y, z) = (x AND y) XOR (NOT x AND z) |
| #define SHA256T1(const, e, f, g, h) \ |
| MOVL (h*4)(DI), BX; \ |
| ADDL AX, BX; \ |
| MOVL (e*4)(DI), AX; \ |
| ADDL $const, BX; \ |
| MOVL (e*4)(DI), CX; \ |
| RORL $6, AX; \ |
| MOVL (e*4)(DI), DX; \ |
| RORL $11, CX; \ |
| XORL CX, AX; \ |
| MOVL (e*4)(DI), CX; \ |
| RORL $25, DX; \ |
| ANDL (f*4)(DI), CX; \ |
| XORL AX, DX; \ |
| MOVL (e*4)(DI), AX; \ |
| NOTL AX; \ |
| ADDL DX, BX; \ |
| ANDL (g*4)(DI), AX; \ |
| XORL CX, AX; \ |
| ADDL BX, AX |
| |
| // Calculate T2 in BX - uses AX, BX, CX and DX registers. |
| // T2 = BIGSIGMA0(a) + Maj(a, b, c) |
| // BIGSIGMA0(x) = ROTR(2,x) XOR ROTR(13,x) XOR ROTR(22,x) |
| // Maj(x, y, z) = (x AND y) XOR (x AND z) XOR (y AND z) |
| #define SHA256T2(a, b, c) \ |
| MOVL (a*4)(DI), AX; \ |
| MOVL (c*4)(DI), BX; \ |
| RORL $2, AX; \ |
| MOVL (a*4)(DI), DX; \ |
| ANDL (b*4)(DI), BX; \ |
| RORL $13, DX; \ |
| MOVL (a*4)(DI), CX; \ |
| ANDL (c*4)(DI), CX; \ |
| XORL DX, AX; \ |
| XORL CX, BX; \ |
| MOVL (a*4)(DI), DX; \ |
| MOVL (b*4)(DI), CX; \ |
| RORL $22, DX; \ |
| ANDL (a*4)(DI), CX; \ |
| XORL CX, BX; \ |
| XORL DX, AX; \ |
| ADDL AX, BX |
| |
| // Calculate T1 and T2, then e = d + T1 and a = T1 + T2. |
| // The values for e and a are stored in d and h, ready for rotation. |
| #define SHA256ROUND(index, const, a, b, c, d, e, f, g, h) \ |
| SHA256T1(const, e, f, g, h); \ |
| MOVL AX, 292(SP); \ |
| SHA256T2(a, b, c); \ |
| MOVL 292(SP), AX; \ |
| ADDL AX, BX; \ |
| ADDL AX, (d*4)(DI); \ |
| MOVL BX, (h*4)(DI) |
| |
| #define SHA256ROUND0(index, const, a, b, c, d, e, f, g, h) \ |
| MSGSCHEDULE0(index); \ |
| SHA256ROUND(index, const, a, b, c, d, e, f, g, h) |
| |
| #define SHA256ROUND1(index, const, a, b, c, d, e, f, g, h) \ |
| MSGSCHEDULE1(index); \ |
| SHA256ROUND(index, const, a, b, c, d, e, f, g, h) |
| |
| TEXT ·block(SB),0,$296-16 |
| MOVL p_base+4(FP), SI |
| MOVL p_len+8(FP), DX |
| SHRL $6, DX |
| SHLL $6, DX |
| |
| LEAL (SI)(DX*1), DI |
| MOVL DI, 288(SP) |
| CMPL SI, DI |
| JEQ end |
| |
| LEAL 256(SP), DI // variables |
| |
| MOVL dig+0(FP), BP |
| MOVL (0*4)(BP), AX // a = H0 |
| MOVL AX, (0*4)(DI) |
| MOVL (1*4)(BP), BX // b = H1 |
| MOVL BX, (1*4)(DI) |
| MOVL (2*4)(BP), CX // c = H2 |
| MOVL CX, (2*4)(DI) |
| MOVL (3*4)(BP), DX // d = H3 |
| MOVL DX, (3*4)(DI) |
| MOVL (4*4)(BP), AX // e = H4 |
| MOVL AX, (4*4)(DI) |
| MOVL (5*4)(BP), BX // f = H5 |
| MOVL BX, (5*4)(DI) |
| MOVL (6*4)(BP), CX // g = H6 |
| MOVL CX, (6*4)(DI) |
| MOVL (7*4)(BP), DX // h = H7 |
| MOVL DX, (7*4)(DI) |
| |
| loop: |
| MOVL SP, BP // message schedule |
| |
| SHA256ROUND0(0, 0x428a2f98, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND0(1, 0x71374491, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND0(2, 0xb5c0fbcf, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND0(3, 0xe9b5dba5, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND0(4, 0x3956c25b, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND0(5, 0x59f111f1, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND0(6, 0x923f82a4, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND0(7, 0xab1c5ed5, 1, 2, 3, 4, 5, 6, 7, 0) |
| SHA256ROUND0(8, 0xd807aa98, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND0(9, 0x12835b01, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND0(10, 0x243185be, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND0(11, 0x550c7dc3, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND0(12, 0x72be5d74, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND0(13, 0x80deb1fe, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND0(14, 0x9bdc06a7, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND0(15, 0xc19bf174, 1, 2, 3, 4, 5, 6, 7, 0) |
| |
| SHA256ROUND1(16, 0xe49b69c1, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND1(17, 0xefbe4786, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND1(18, 0x0fc19dc6, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND1(19, 0x240ca1cc, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND1(20, 0x2de92c6f, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND1(21, 0x4a7484aa, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND1(22, 0x5cb0a9dc, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND1(23, 0x76f988da, 1, 2, 3, 4, 5, 6, 7, 0) |
| SHA256ROUND1(24, 0x983e5152, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND1(25, 0xa831c66d, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND1(26, 0xb00327c8, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND1(27, 0xbf597fc7, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND1(28, 0xc6e00bf3, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND1(29, 0xd5a79147, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND1(30, 0x06ca6351, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND1(31, 0x14292967, 1, 2, 3, 4, 5, 6, 7, 0) |
| SHA256ROUND1(32, 0x27b70a85, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND1(33, 0x2e1b2138, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND1(34, 0x4d2c6dfc, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND1(35, 0x53380d13, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND1(36, 0x650a7354, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND1(37, 0x766a0abb, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND1(38, 0x81c2c92e, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND1(39, 0x92722c85, 1, 2, 3, 4, 5, 6, 7, 0) |
| SHA256ROUND1(40, 0xa2bfe8a1, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND1(41, 0xa81a664b, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND1(42, 0xc24b8b70, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND1(43, 0xc76c51a3, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND1(44, 0xd192e819, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND1(45, 0xd6990624, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND1(46, 0xf40e3585, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND1(47, 0x106aa070, 1, 2, 3, 4, 5, 6, 7, 0) |
| SHA256ROUND1(48, 0x19a4c116, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND1(49, 0x1e376c08, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND1(50, 0x2748774c, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND1(51, 0x34b0bcb5, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND1(52, 0x391c0cb3, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND1(53, 0x4ed8aa4a, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND1(54, 0x5b9cca4f, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND1(55, 0x682e6ff3, 1, 2, 3, 4, 5, 6, 7, 0) |
| SHA256ROUND1(56, 0x748f82ee, 0, 1, 2, 3, 4, 5, 6, 7) |
| SHA256ROUND1(57, 0x78a5636f, 7, 0, 1, 2, 3, 4, 5, 6) |
| SHA256ROUND1(58, 0x84c87814, 6, 7, 0, 1, 2, 3, 4, 5) |
| SHA256ROUND1(59, 0x8cc70208, 5, 6, 7, 0, 1, 2, 3, 4) |
| SHA256ROUND1(60, 0x90befffa, 4, 5, 6, 7, 0, 1, 2, 3) |
| SHA256ROUND1(61, 0xa4506ceb, 3, 4, 5, 6, 7, 0, 1, 2) |
| SHA256ROUND1(62, 0xbef9a3f7, 2, 3, 4, 5, 6, 7, 0, 1) |
| SHA256ROUND1(63, 0xc67178f2, 1, 2, 3, 4, 5, 6, 7, 0) |
| |
| MOVL dig+0(FP), BP |
| MOVL (0*4)(BP), AX // H0 = a + H0 |
| ADDL (0*4)(DI), AX |
| MOVL AX, (0*4)(DI) |
| MOVL AX, (0*4)(BP) |
| MOVL (1*4)(BP), BX // H1 = b + H1 |
| ADDL (1*4)(DI), BX |
| MOVL BX, (1*4)(DI) |
| MOVL BX, (1*4)(BP) |
| MOVL (2*4)(BP), CX // H2 = c + H2 |
| ADDL (2*4)(DI), CX |
| MOVL CX, (2*4)(DI) |
| MOVL CX, (2*4)(BP) |
| MOVL (3*4)(BP), DX // H3 = d + H3 |
| ADDL (3*4)(DI), DX |
| MOVL DX, (3*4)(DI) |
| MOVL DX, (3*4)(BP) |
| MOVL (4*4)(BP), AX // H4 = e + H4 |
| ADDL (4*4)(DI), AX |
| MOVL AX, (4*4)(DI) |
| MOVL AX, (4*4)(BP) |
| MOVL (5*4)(BP), BX // H5 = f + H5 |
| ADDL (5*4)(DI), BX |
| MOVL BX, (5*4)(DI) |
| MOVL BX, (5*4)(BP) |
| MOVL (6*4)(BP), CX // H6 = g + H6 |
| ADDL (6*4)(DI), CX |
| MOVL CX, (6*4)(DI) |
| MOVL CX, (6*4)(BP) |
| MOVL (7*4)(BP), DX // H7 = h + H7 |
| ADDL (7*4)(DI), DX |
| MOVL DX, (7*4)(DI) |
| MOVL DX, (7*4)(BP) |
| |
| ADDL $64, SI |
| CMPL SI, 288(SP) |
| JB loop |
| |
| end: |
| RET |
