| // Copyright 2016 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. |
| |
| #include "textflag.h" |
| |
| // 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) \ |
| MOVWZ (index*4)(R26), R7; \ |
| RLWNM $24, R7, $-1, R11; \ |
| RLWMI $8, R7, $0x00FF0000, R11; \ |
| RLWMI $8, R7, $0x000000FF, R11; \ |
| MOVWZ R11, R7; \ |
| MOVWZ R7, (index*4)(R27) |
| |
| // 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) \ |
| MOVWZ ((index-2)*4)(R27), R7; \ |
| MOVWZ R7, R9; \ |
| RLWNM $32-17, R7, $-1, R7; \ |
| MOVWZ R9, R10; \ |
| RLWNM $32-19, R9, $-1, R9; \ |
| SRW $10, R10; \ |
| MOVWZ ((index-15)*4)(R27), R8; \ |
| XOR R9, R7; \ |
| MOVWZ R8, R9; \ |
| XOR R10, R7; \ |
| RLWNM $32-7, R8, $-1, R8; \ |
| MOVWZ R9, R10; \ |
| SRW $3, R10; \ |
| RLWNM $32-18, R9, $-1, R9; \ |
| MOVWZ ((index-7)*4)(R27), R11; \ |
| ADD R11, R7; \ |
| XOR R9, R8; \ |
| XOR R10, R8; \ |
| MOVWZ ((index-16)*4)(R27), R11; \ |
| ADD R11, R8; \ |
| ADD R8, R7; \ |
| MOVWZ R7, ((index)*4)(R27) |
| |
| // 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) \ |
| ADD R7, h; \ |
| MOVWZ e, R7; \ |
| ADD $const, h; \ |
| MOVWZ e, R9; \ |
| RLWNM $32-6, R7, $-1, R7; \ |
| MOVWZ e, R10; \ |
| RLWNM $32-11, R9, $-1, R9; \ |
| XOR R9, R7; \ |
| MOVWZ e, R9; \ |
| RLWNM $32-25, R10, $-1, R10; \ |
| AND f, R9; \ |
| XOR R7, R10; \ |
| MOVWZ e, R7; \ |
| NOR R7, R7, R7; \ |
| ADD R10, h; \ |
| AND g, R7; \ |
| XOR R9, R7; \ |
| ADD h, R7 |
| |
| // 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) \ |
| MOVWZ a, R28; \ |
| MOVWZ c, R8; \ |
| RLWNM $32-2, R28, $-1, R28; \ |
| MOVWZ a, R10; \ |
| AND b, R8; \ |
| RLWNM $32-13, R10, $-1, R10; \ |
| MOVWZ a, R9; \ |
| AND c, R9; \ |
| XOR R10, R28; \ |
| XOR R9, R8; \ |
| MOVWZ a, R10; \ |
| MOVWZ b, R9; \ |
| RLWNM $32-22, R10, $-1, R10; \ |
| AND a, R9; \ |
| XOR R9, R8; \ |
| XOR R10, R28; \ |
| ADD R28, R8 |
| |
| // 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); \ |
| SHA256T2(a, b, c); \ |
| MOVWZ R8, h; \ |
| ADD R7, d; \ |
| ADD R7, h |
| |
| #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) |
| |
| // func block(dig *digest, p []byte) |
| TEXT ·block(SB),0,$296-32 |
| MOVD p_base+8(FP), R26 |
| MOVD p_len+16(FP), R29 |
| SRD $6, R29 |
| SLD $6, R29 |
| |
| ADD R26, R29, R28 |
| |
| MOVD R28, 256(R1) |
| CMP R26, R28 |
| BEQ end |
| |
| MOVD dig+0(FP), R27 |
| MOVWZ (0*4)(R27), R14 // a = H0 |
| MOVWZ (1*4)(R27), R15 // b = H1 |
| MOVWZ (2*4)(R27), R16 // c = H2 |
| MOVWZ (3*4)(R27), R17 // d = H3 |
| MOVWZ (4*4)(R27), R18 // e = H4 |
| MOVWZ (5*4)(R27), R19 // f = H5 |
| MOVWZ (6*4)(R27), R20 // g = H6 |
| MOVWZ (7*4)(R27), R21 // h = H7 |
| |
| loop: |
| MOVD R1, R27 // R27: message schedule |
| |
| SHA256ROUND0(0, 0x428a2f98, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND0(1, 0x71374491, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND0(2, 0xb5c0fbcf, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND0(3, 0xe9b5dba5, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND0(4, 0x3956c25b, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND0(5, 0x59f111f1, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND0(6, 0x923f82a4, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND0(7, 0xab1c5ed5, R15, R16, R17, R18, R19, R20, R21, R14) |
| SHA256ROUND0(8, 0xd807aa98, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND0(9, 0x12835b01, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND0(10, 0x243185be, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND0(11, 0x550c7dc3, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND0(12, 0x72be5d74, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND0(13, 0x80deb1fe, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND0(14, 0x9bdc06a7, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND0(15, 0xc19bf174, R15, R16, R17, R18, R19, R20, R21, R14) |
| |
| SHA256ROUND1(16, 0xe49b69c1, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND1(17, 0xefbe4786, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND1(18, 0x0fc19dc6, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND1(19, 0x240ca1cc, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND1(20, 0x2de92c6f, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND1(21, 0x4a7484aa, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND1(22, 0x5cb0a9dc, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND1(23, 0x76f988da, R15, R16, R17, R18, R19, R20, R21, R14) |
| SHA256ROUND1(24, 0x983e5152, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND1(25, 0xa831c66d, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND1(26, 0xb00327c8, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND1(27, 0xbf597fc7, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND1(28, 0xc6e00bf3, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND1(29, 0xd5a79147, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND1(30, 0x06ca6351, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND1(31, 0x14292967, R15, R16, R17, R18, R19, R20, R21, R14) |
| SHA256ROUND1(32, 0x27b70a85, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND1(33, 0x2e1b2138, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND1(34, 0x4d2c6dfc, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND1(35, 0x53380d13, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND1(36, 0x650a7354, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND1(37, 0x766a0abb, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND1(38, 0x81c2c92e, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND1(39, 0x92722c85, R15, R16, R17, R18, R19, R20, R21, R14) |
| SHA256ROUND1(40, 0xa2bfe8a1, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND1(41, 0xa81a664b, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND1(42, 0xc24b8b70, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND1(43, 0xc76c51a3, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND1(44, 0xd192e819, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND1(45, 0xd6990624, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND1(46, 0xf40e3585, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND1(47, 0x106aa070, R15, R16, R17, R18, R19, R20, R21, R14) |
| SHA256ROUND1(48, 0x19a4c116, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND1(49, 0x1e376c08, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND1(50, 0x2748774c, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND1(51, 0x34b0bcb5, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND1(52, 0x391c0cb3, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND1(53, 0x4ed8aa4a, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND1(54, 0x5b9cca4f, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND1(55, 0x682e6ff3, R15, R16, R17, R18, R19, R20, R21, R14) |
| SHA256ROUND1(56, 0x748f82ee, R14, R15, R16, R17, R18, R19, R20, R21) |
| SHA256ROUND1(57, 0x78a5636f, R21, R14, R15, R16, R17, R18, R19, R20) |
| SHA256ROUND1(58, 0x84c87814, R20, R21, R14, R15, R16, R17, R18, R19) |
| SHA256ROUND1(59, 0x8cc70208, R19, R20, R21, R14, R15, R16, R17, R18) |
| SHA256ROUND1(60, 0x90befffa, R18, R19, R20, R21, R14, R15, R16, R17) |
| SHA256ROUND1(61, 0xa4506ceb, R17, R18, R19, R20, R21, R14, R15, R16) |
| SHA256ROUND1(62, 0xbef9a3f7, R16, R17, R18, R19, R20, R21, R14, R15) |
| SHA256ROUND1(63, 0xc67178f2, R15, R16, R17, R18, R19, R20, R21, R14) |
| |
| MOVD dig+0(FP), R27 |
| MOVWZ (0*4)(R27), R11 |
| ADD R11, R14 // H0 = a + H0 |
| MOVWZ R14, (0*4)(R27) |
| MOVWZ (1*4)(R27), R11 |
| ADD R11, R15 // H1 = b + H1 |
| MOVWZ R15, (1*4)(R27) |
| MOVWZ (2*4)(R27), R11 |
| ADD R11, R16 // H2 = c + H2 |
| MOVWZ R16, (2*4)(R27) |
| MOVWZ (3*4)(R27), R11 |
| ADD R11, R17 // H3 = d + H3 |
| MOVWZ R17, (3*4)(R27) |
| MOVWZ (4*4)(R27), R11 |
| ADD R11, R18 // H4 = e + H4 |
| MOVWZ R18, (4*4)(R27) |
| MOVWZ (5*4)(R27), R11 |
| ADD R11, R19 // H5 = f + H5 |
| MOVWZ R19, (5*4)(R27) |
| MOVWZ (6*4)(R27), R11 |
| ADD R11, R20 // H6 = g + H6 |
| MOVWZ R20, (6*4)(R27) |
| MOVWZ (7*4)(R27), R11 |
| ADD R11, R21 // H7 = h + H7 |
| MOVWZ R21, (7*4)(R27) |
| |
| ADD $64, R26 |
| MOVD 256(R1), R11 |
| CMPU R26, R11 |
| BLT loop |
| |
| end: |
| RET |
