diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/crypto/sha1/sha1block.go')
-rw-r--r-- | gcc-4.8.1/libgo/go/crypto/sha1/sha1block.go | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/gcc-4.8.1/libgo/go/crypto/sha1/sha1block.go b/gcc-4.8.1/libgo/go/crypto/sha1/sha1block.go deleted file mode 100644 index 1c9507c68..000000000 --- a/gcc-4.8.1/libgo/go/crypto/sha1/sha1block.go +++ /dev/null @@ -1,92 +0,0 @@ -// Copyright 2009 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. - -// SHA1 block step. -// In its own file so that a faster assembly or C version -// can be substituted easily. - -package sha1 - -const ( - _K0 = 0x5A827999 - _K1 = 0x6ED9EBA1 - _K2 = 0x8F1BBCDC - _K3 = 0xCA62C1D6 -) - -func block(dig *digest, p []byte) { - var w [16]uint32 - - h0, h1, h2, h3, h4 := dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4] - for len(p) >= chunk { - // Can interlace the computation of w with the - // rounds below if needed for speed. - for i := 0; i < 16; i++ { - j := i * 4 - w[i] = uint32(p[j])<<24 | uint32(p[j+1])<<16 | uint32(p[j+2])<<8 | uint32(p[j+3]) - } - - a, b, c, d, e := h0, h1, h2, h3, h4 - - // Each of the four 20-iteration rounds - // differs only in the computation of f and - // the choice of K (_K0, _K1, etc). - i := 0 - for ; i < 16; i++ { - f := b&c | (^b)&d - a5 := a<<5 | a>>(32-5) - b30 := b<<30 | b>>(32-30) - t := a5 + f + e + w[i&0xf] + _K0 - a, b, c, d, e = t, a, b30, c, d - } - for ; i < 20; i++ { - tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] - w[i&0xf] = tmp<<1 | tmp>>(32-1) - - f := b&c | (^b)&d - a5 := a<<5 | a>>(32-5) - b30 := b<<30 | b>>(32-30) - t := a5 + f + e + w[i&0xf] + _K0 - a, b, c, d, e = t, a, b30, c, d - } - for ; i < 40; i++ { - tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] - w[i&0xf] = tmp<<1 | tmp>>(32-1) - f := b ^ c ^ d - a5 := a<<5 | a>>(32-5) - b30 := b<<30 | b>>(32-30) - t := a5 + f + e + w[i&0xf] + _K1 - a, b, c, d, e = t, a, b30, c, d - } - for ; i < 60; i++ { - tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] - w[i&0xf] = tmp<<1 | tmp>>(32-1) - f := ((b | c) & d) | (b & c) - - a5 := a<<5 | a>>(32-5) - b30 := b<<30 | b>>(32-30) - t := a5 + f + e + w[i&0xf] + _K2 - a, b, c, d, e = t, a, b30, c, d - } - for ; i < 80; i++ { - tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] - w[i&0xf] = tmp<<1 | tmp>>(32-1) - f := b ^ c ^ d - a5 := a<<5 | a>>(32-5) - b30 := b<<30 | b>>(32-30) - t := a5 + f + e + w[i&0xf] + _K3 - a, b, c, d, e = t, a, b30, c, d - } - - h0 += a - h1 += b - h2 += c - h3 += d - h4 += e - - p = p[chunk:] - } - - dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4] = h0, h1, h2, h3, h4 -} |