| // 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. |
| |
| // DO NOT EDIT. |
| // Generate with: go run gen.go -full -output md5block.go |
| |
| package md5 |
| |
| import ( |
| "runtime" |
| "unsafe" |
| ) |
| |
| const x86 = runtime.GOARCH == "amd64" || runtime.GOARCH == "386" |
| |
| var littleEndian bool |
| |
| func init() { |
| x := uint32(0x04030201) |
| y := [4]byte{0x1, 0x2, 0x3, 0x4} |
| littleEndian = *(*[4]byte)(unsafe.Pointer(&x)) == y |
| } |
| |
| func blockGeneric(dig *digest, p []byte) { |
| a := dig.s[0] |
| b := dig.s[1] |
| c := dig.s[2] |
| d := dig.s[3] |
| var X *[16]uint32 |
| var xbuf [16]uint32 |
| for len(p) >= chunk { |
| aa, bb, cc, dd := a, b, c, d |
| |
| // This is a constant condition - it is not evaluated on each iteration. |
| if x86 { |
| // MD5 was designed so that x86 processors can just iterate |
| // over the block data directly as uint32s, and we generate |
| // less code and run 1.3x faster if we take advantage of that. |
| // My apologies. |
| X = (*[16]uint32)(unsafe.Pointer(&p[0])) |
| } else if littleEndian && uintptr(unsafe.Pointer(&p[0]))&(unsafe.Alignof(uint32(0))-1) == 0 { |
| X = (*[16]uint32)(unsafe.Pointer(&p[0])) |
| } else { |
| X = &xbuf |
| j := 0 |
| for i := 0; i < 16; i++ { |
| X[i&15] = uint32(p[j]) | uint32(p[j+1])<<8 | uint32(p[j+2])<<16 | uint32(p[j+3])<<24 |
| j += 4 |
| } |
| } |
| |
| // Round 1. |
| |
| a += (((c ^ d) & b) ^ d) + X[0] + 3614090360 |
| a = a<<7 | a>>(32-7) + b |
| |
| d += (((b ^ c) & a) ^ c) + X[1] + 3905402710 |
| d = d<<12 | d>>(32-12) + a |
| |
| c += (((a ^ b) & d) ^ b) + X[2] + 606105819 |
| c = c<<17 | c>>(32-17) + d |
| |
| b += (((d ^ a) & c) ^ a) + X[3] + 3250441966 |
| b = b<<22 | b>>(32-22) + c |
| |
| a += (((c ^ d) & b) ^ d) + X[4] + 4118548399 |
| a = a<<7 | a>>(32-7) + b |
| |
| d += (((b ^ c) & a) ^ c) + X[5] + 1200080426 |
| d = d<<12 | d>>(32-12) + a |
| |
| c += (((a ^ b) & d) ^ b) + X[6] + 2821735955 |
| c = c<<17 | c>>(32-17) + d |
| |
| b += (((d ^ a) & c) ^ a) + X[7] + 4249261313 |
| b = b<<22 | b>>(32-22) + c |
| |
| a += (((c ^ d) & b) ^ d) + X[8] + 1770035416 |
| a = a<<7 | a>>(32-7) + b |
| |
| d += (((b ^ c) & a) ^ c) + X[9] + 2336552879 |
| d = d<<12 | d>>(32-12) + a |
| |
| c += (((a ^ b) & d) ^ b) + X[10] + 4294925233 |
| c = c<<17 | c>>(32-17) + d |
| |
| b += (((d ^ a) & c) ^ a) + X[11] + 2304563134 |
| b = b<<22 | b>>(32-22) + c |
| |
| a += (((c ^ d) & b) ^ d) + X[12] + 1804603682 |
| a = a<<7 | a>>(32-7) + b |
| |
| d += (((b ^ c) & a) ^ c) + X[13] + 4254626195 |
| d = d<<12 | d>>(32-12) + a |
| |
| c += (((a ^ b) & d) ^ b) + X[14] + 2792965006 |
| c = c<<17 | c>>(32-17) + d |
| |
| b += (((d ^ a) & c) ^ a) + X[15] + 1236535329 |
| b = b<<22 | b>>(32-22) + c |
| |
| // Round 2. |
| |
| a += (((b ^ c) & d) ^ c) + X[(1+5*0)&15] + 4129170786 |
| a = a<<5 | a>>(32-5) + b |
| |
| d += (((a ^ b) & c) ^ b) + X[(1+5*1)&15] + 3225465664 |
| d = d<<9 | d>>(32-9) + a |
| |
| c += (((d ^ a) & b) ^ a) + X[(1+5*2)&15] + 643717713 |
| c = c<<14 | c>>(32-14) + d |
| |
| b += (((c ^ d) & a) ^ d) + X[(1+5*3)&15] + 3921069994 |
| b = b<<20 | b>>(32-20) + c |
| |
| a += (((b ^ c) & d) ^ c) + X[(1+5*4)&15] + 3593408605 |
| a = a<<5 | a>>(32-5) + b |
| |
| d += (((a ^ b) & c) ^ b) + X[(1+5*5)&15] + 38016083 |
| d = d<<9 | d>>(32-9) + a |
| |
| c += (((d ^ a) & b) ^ a) + X[(1+5*6)&15] + 3634488961 |
| c = c<<14 | c>>(32-14) + d |
| |
| b += (((c ^ d) & a) ^ d) + X[(1+5*7)&15] + 3889429448 |
| b = b<<20 | b>>(32-20) + c |
| |
| a += (((b ^ c) & d) ^ c) + X[(1+5*8)&15] + 568446438 |
| a = a<<5 | a>>(32-5) + b |
| |
| d += (((a ^ b) & c) ^ b) + X[(1+5*9)&15] + 3275163606 |
| d = d<<9 | d>>(32-9) + a |
| |
| c += (((d ^ a) & b) ^ a) + X[(1+5*10)&15] + 4107603335 |
| c = c<<14 | c>>(32-14) + d |
| |
| b += (((c ^ d) & a) ^ d) + X[(1+5*11)&15] + 1163531501 |
| b = b<<20 | b>>(32-20) + c |
| |
| a += (((b ^ c) & d) ^ c) + X[(1+5*12)&15] + 2850285829 |
| a = a<<5 | a>>(32-5) + b |
| |
| d += (((a ^ b) & c) ^ b) + X[(1+5*13)&15] + 4243563512 |
| d = d<<9 | d>>(32-9) + a |
| |
| c += (((d ^ a) & b) ^ a) + X[(1+5*14)&15] + 1735328473 |
| c = c<<14 | c>>(32-14) + d |
| |
| b += (((c ^ d) & a) ^ d) + X[(1+5*15)&15] + 2368359562 |
| b = b<<20 | b>>(32-20) + c |
| |
| // Round 3. |
| |
| a += (b ^ c ^ d) + X[(5+3*0)&15] + 4294588738 |
| a = a<<4 | a>>(32-4) + b |
| |
| d += (a ^ b ^ c) + X[(5+3*1)&15] + 2272392833 |
| d = d<<11 | d>>(32-11) + a |
| |
| c += (d ^ a ^ b) + X[(5+3*2)&15] + 1839030562 |
| c = c<<16 | c>>(32-16) + d |
| |
| b += (c ^ d ^ a) + X[(5+3*3)&15] + 4259657740 |
| b = b<<23 | b>>(32-23) + c |
| |
| a += (b ^ c ^ d) + X[(5+3*4)&15] + 2763975236 |
| a = a<<4 | a>>(32-4) + b |
| |
| d += (a ^ b ^ c) + X[(5+3*5)&15] + 1272893353 |
| d = d<<11 | d>>(32-11) + a |
| |
| c += (d ^ a ^ b) + X[(5+3*6)&15] + 4139469664 |
| c = c<<16 | c>>(32-16) + d |
| |
| b += (c ^ d ^ a) + X[(5+3*7)&15] + 3200236656 |
| b = b<<23 | b>>(32-23) + c |
| |
| a += (b ^ c ^ d) + X[(5+3*8)&15] + 681279174 |
| a = a<<4 | a>>(32-4) + b |
| |
| d += (a ^ b ^ c) + X[(5+3*9)&15] + 3936430074 |
| d = d<<11 | d>>(32-11) + a |
| |
| c += (d ^ a ^ b) + X[(5+3*10)&15] + 3572445317 |
| c = c<<16 | c>>(32-16) + d |
| |
| b += (c ^ d ^ a) + X[(5+3*11)&15] + 76029189 |
| b = b<<23 | b>>(32-23) + c |
| |
| a += (b ^ c ^ d) + X[(5+3*12)&15] + 3654602809 |
| a = a<<4 | a>>(32-4) + b |
| |
| d += (a ^ b ^ c) + X[(5+3*13)&15] + 3873151461 |
| d = d<<11 | d>>(32-11) + a |
| |
| c += (d ^ a ^ b) + X[(5+3*14)&15] + 530742520 |
| c = c<<16 | c>>(32-16) + d |
| |
| b += (c ^ d ^ a) + X[(5+3*15)&15] + 3299628645 |
| b = b<<23 | b>>(32-23) + c |
| |
| // Round 4. |
| |
| a += (c ^ (b | ^d)) + X[(7*0)&15] + 4096336452 |
| a = a<<6 | a>>(32-6) + b |
| |
| d += (b ^ (a | ^c)) + X[(7*1)&15] + 1126891415 |
| d = d<<10 | d>>(32-10) + a |
| |
| c += (a ^ (d | ^b)) + X[(7*2)&15] + 2878612391 |
| c = c<<15 | c>>(32-15) + d |
| |
| b += (d ^ (c | ^a)) + X[(7*3)&15] + 4237533241 |
| b = b<<21 | b>>(32-21) + c |
| |
| a += (c ^ (b | ^d)) + X[(7*4)&15] + 1700485571 |
| a = a<<6 | a>>(32-6) + b |
| |
| d += (b ^ (a | ^c)) + X[(7*5)&15] + 2399980690 |
| d = d<<10 | d>>(32-10) + a |
| |
| c += (a ^ (d | ^b)) + X[(7*6)&15] + 4293915773 |
| c = c<<15 | c>>(32-15) + d |
| |
| b += (d ^ (c | ^a)) + X[(7*7)&15] + 2240044497 |
| b = b<<21 | b>>(32-21) + c |
| |
| a += (c ^ (b | ^d)) + X[(7*8)&15] + 1873313359 |
| a = a<<6 | a>>(32-6) + b |
| |
| d += (b ^ (a | ^c)) + X[(7*9)&15] + 4264355552 |
| d = d<<10 | d>>(32-10) + a |
| |
| c += (a ^ (d | ^b)) + X[(7*10)&15] + 2734768916 |
| c = c<<15 | c>>(32-15) + d |
| |
| b += (d ^ (c | ^a)) + X[(7*11)&15] + 1309151649 |
| b = b<<21 | b>>(32-21) + c |
| |
| a += (c ^ (b | ^d)) + X[(7*12)&15] + 4149444226 |
| a = a<<6 | a>>(32-6) + b |
| |
| d += (b ^ (a | ^c)) + X[(7*13)&15] + 3174756917 |
| d = d<<10 | d>>(32-10) + a |
| |
| c += (a ^ (d | ^b)) + X[(7*14)&15] + 718787259 |
| c = c<<15 | c>>(32-15) + d |
| |
| b += (d ^ (c | ^a)) + X[(7*15)&15] + 3951481745 |
| b = b<<21 | b>>(32-21) + c |
| |
| a += aa |
| b += bb |
| c += cc |
| d += dd |
| |
| p = p[chunk:] |
| } |
| |
| dig.s[0] = a |
| dig.s[1] = b |
| dig.s[2] = c |
| dig.s[3] = d |
| } |
