diff options
Diffstat (limited to 'src/cmd/internal/gc/md5.go')
| -rw-r--r-- | src/cmd/internal/gc/md5.go | 87 |
1 files changed, 28 insertions, 59 deletions
diff --git a/src/cmd/internal/gc/md5.go b/src/cmd/internal/gc/md5.go index 862fdd553e..3b5190013e 100644 --- a/src/cmd/internal/gc/md5.go +++ b/src/cmd/internal/gc/md5.go @@ -39,16 +39,13 @@ func md5reset(d *MD5) { } func md5write(d *MD5, p []byte, nn int) { - var i int - var n int - d.len += uint64(nn) if d.nx > 0 { - n = nn + n := nn if n > _Chunk-d.nx { n = _Chunk - d.nx } - for i = 0; i < n; i++ { + for i := 0; i < n; i++ { d.x[d.nx+i] = uint8(p[i]) } d.nx += n @@ -61,11 +58,11 @@ func md5write(d *MD5, p []byte, nn int) { nn -= n } - n = md5block(d, p, nn) + n := md5block(d, p, nn) p = p[n:] nn -= n if nn > 0 { - for i = 0; i < nn; i++ { + for i := 0; i < nn; i++ { d.x[i] = uint8(p[i]) } d.nx = nn @@ -73,14 +70,10 @@ func md5write(d *MD5, p []byte, nn int) { } func md5sum(d *MD5, hi *uint64) uint64 { - var tmp [64]uint8 - var i int - var len uint64 - // Padding. Add a 1 bit and 0 bits until 56 bytes mod 64. - len = d.len + len := d.len - tmp = [64]uint8{} + tmp := [64]uint8{} tmp[0] = 0x80 if len%64 < 56 { md5write(d, tmp[:], int(56-len%64)) @@ -91,7 +84,7 @@ func md5sum(d *MD5, hi *uint64) uint64 { // Length in bits. len <<= 3 - for i = 0; i < 8; i++ { + for i := 0; i < 8; i++ { tmp[i] = uint8(len >> uint(8*i)) } md5write(d, tmp[:], 8) @@ -194,24 +187,19 @@ var shift3 = []uint32{4, 11, 16, 23} var shift4 = []uint32{6, 10, 15, 21} func md5block(dig *MD5, p []byte, nn int) int { - var a uint32 - var b uint32 - var c uint32 - var d uint32 var aa uint32 var bb uint32 var cc uint32 var dd uint32 var i int var j int - var n int var X [16]uint32 - a = dig.s[0] - b = dig.s[1] - c = dig.s[2] - d = dig.s[3] - n = 0 + a := dig.s[0] + b := dig.s[1] + c := dig.s[2] + d := dig.s[3] + n := 0 for nn >= _Chunk { aa = a @@ -226,14 +214,10 @@ func md5block(dig *MD5, p []byte, nn int) int { // Round 1. for i = 0; i < 16; i++ { - var x uint32 - var t uint32 - var s uint32 - var f uint32 - x = uint32(i) - t = uint32(i) - s = shift1[i%4] - f = ((c ^ d) & b) ^ d + x := uint32(i) + t := uint32(i) + s := shift1[i%4] + f := ((c ^ d) & b) ^ d a += f + X[x] + table[t] a = a<<s | a>>(32-s) a += b @@ -247,15 +231,10 @@ func md5block(dig *MD5, p []byte, nn int) int { // Round 2. for i = 0; i < 16; i++ { - var x uint32 - var t uint32 - var s uint32 - var g uint32 - - x = (1 + 5*uint32(i)) % 16 - t = 16 + uint32(i) - s = shift2[i%4] - g = ((b ^ c) & d) ^ c + x := (1 + 5*uint32(i)) % 16 + t := 16 + uint32(i) + s := shift2[i%4] + g := ((b ^ c) & d) ^ c a += g + X[x] + table[t] a = a<<s | a>>(32-s) a += b @@ -269,15 +248,10 @@ func md5block(dig *MD5, p []byte, nn int) int { // Round 3. for i = 0; i < 16; i++ { - var x uint32 - var t uint32 - var s uint32 - var h uint32 - - x = (5 + 3*uint32(i)) % 16 - t = 32 + uint32(i) - s = shift3[i%4] - h = b ^ c ^ d + x := (5 + 3*uint32(i)) % 16 + t := 32 + uint32(i) + s := shift3[i%4] + h := b ^ c ^ d a += h + X[x] + table[t] a = a<<s | a>>(32-s) a += b @@ -291,15 +265,10 @@ func md5block(dig *MD5, p []byte, nn int) int { // Round 4. for i = 0; i < 16; i++ { - var x uint32 - var s uint32 - var t uint32 - var ii uint32 - - x = (7 * uint32(i)) % 16 - s = shift4[i%4] - t = 48 + uint32(i) - ii = c ^ (b | ^d) + x := (7 * uint32(i)) % 16 + s := shift4[i%4] + t := 48 + uint32(i) + ii := c ^ (b | ^d) a += ii + X[x] + table[t] a = a<<s | a>>(32-s) a += b |