// DO NOT EDIT. // Generate with: go run gen.go -full | gofmt >md5block.go // +build !amd64,!386,!arm 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 block(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 }