diff options
Diffstat (limited to 'src/pkg/crypto/sha512/sha512.go')
-rw-r--r-- | src/pkg/crypto/sha512/sha512.go | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/src/pkg/crypto/sha512/sha512.go b/src/pkg/crypto/sha512/sha512.go deleted file mode 100644 index bca7a91e2..000000000 --- a/src/pkg/crypto/sha512/sha512.go +++ /dev/null @@ -1,198 +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. - -// Package sha512 implements the SHA384 and SHA512 hash algorithms as defined -// in FIPS 180-2. -package sha512 - -import ( - "crypto" - "hash" -) - -func init() { - crypto.RegisterHash(crypto.SHA384, New384) - crypto.RegisterHash(crypto.SHA512, New) -} - -// The size of a SHA512 checksum in bytes. -const Size = 64 - -// The size of a SHA384 checksum in bytes. -const Size384 = 48 - -// The blocksize of SHA512 and SHA384 in bytes. -const BlockSize = 128 - -const ( - chunk = 128 - init0 = 0x6a09e667f3bcc908 - init1 = 0xbb67ae8584caa73b - init2 = 0x3c6ef372fe94f82b - init3 = 0xa54ff53a5f1d36f1 - init4 = 0x510e527fade682d1 - init5 = 0x9b05688c2b3e6c1f - init6 = 0x1f83d9abfb41bd6b - init7 = 0x5be0cd19137e2179 - init0_384 = 0xcbbb9d5dc1059ed8 - init1_384 = 0x629a292a367cd507 - init2_384 = 0x9159015a3070dd17 - init3_384 = 0x152fecd8f70e5939 - init4_384 = 0x67332667ffc00b31 - init5_384 = 0x8eb44a8768581511 - init6_384 = 0xdb0c2e0d64f98fa7 - init7_384 = 0x47b5481dbefa4fa4 -) - -// digest represents the partial evaluation of a checksum. -type digest struct { - h [8]uint64 - x [chunk]byte - nx int - len uint64 - is384 bool // mark if this digest is SHA-384 -} - -func (d *digest) Reset() { - if !d.is384 { - d.h[0] = init0 - d.h[1] = init1 - d.h[2] = init2 - d.h[3] = init3 - d.h[4] = init4 - d.h[5] = init5 - d.h[6] = init6 - d.h[7] = init7 - } else { - d.h[0] = init0_384 - d.h[1] = init1_384 - d.h[2] = init2_384 - d.h[3] = init3_384 - d.h[4] = init4_384 - d.h[5] = init5_384 - d.h[6] = init6_384 - d.h[7] = init7_384 - } - d.nx = 0 - d.len = 0 -} - -// New returns a new hash.Hash computing the SHA512 checksum. -func New() hash.Hash { - d := new(digest) - d.Reset() - return d -} - -// New384 returns a new hash.Hash computing the SHA384 checksum. -func New384() hash.Hash { - d := new(digest) - d.is384 = true - d.Reset() - return d -} - -func (d *digest) Size() int { - if !d.is384 { - return Size - } - return Size384 -} - -func (d *digest) BlockSize() int { return BlockSize } - -func (d *digest) Write(p []byte) (nn int, err error) { - nn = len(p) - d.len += uint64(nn) - if d.nx > 0 { - n := copy(d.x[d.nx:], p) - d.nx += n - if d.nx == chunk { - block(d, d.x[:]) - d.nx = 0 - } - p = p[n:] - } - if len(p) >= chunk { - n := len(p) &^ (chunk - 1) - block(d, p[:n]) - p = p[n:] - } - if len(p) > 0 { - d.nx = copy(d.x[:], p) - } - return -} - -func (d0 *digest) Sum(in []byte) []byte { - // Make a copy of d0 so that caller can keep writing and summing. - d := new(digest) - *d = *d0 - hash := d.checkSum() - if d.is384 { - return append(in, hash[:Size384]...) - } - return append(in, hash[:]...) -} - -func (d *digest) checkSum() [Size]byte { - // Padding. Add a 1 bit and 0 bits until 112 bytes mod 128. - len := d.len - var tmp [128]byte - tmp[0] = 0x80 - if len%128 < 112 { - d.Write(tmp[0 : 112-len%128]) - } else { - d.Write(tmp[0 : 128+112-len%128]) - } - - // Length in bits. - len <<= 3 - for i := uint(0); i < 16; i++ { - tmp[i] = byte(len >> (120 - 8*i)) - } - d.Write(tmp[0:16]) - - if d.nx != 0 { - panic("d.nx != 0") - } - - h := d.h[:] - if d.is384 { - h = d.h[:6] - } - - var digest [Size]byte - for i, s := range h { - digest[i*8] = byte(s >> 56) - digest[i*8+1] = byte(s >> 48) - digest[i*8+2] = byte(s >> 40) - digest[i*8+3] = byte(s >> 32) - digest[i*8+4] = byte(s >> 24) - digest[i*8+5] = byte(s >> 16) - digest[i*8+6] = byte(s >> 8) - digest[i*8+7] = byte(s) - } - - return digest -} - -// Sum512 returns the SHA512 checksum of the data. -func Sum512(data []byte) [Size]byte { - var d digest - d.Reset() - d.Write(data) - return d.checkSum() -} - -// Sum384 returns the SHA384 checksum of the data. -func Sum384(data []byte) (sum384 [Size384]byte) { - var d digest - d.is384 = true - d.Reset() - d.Write(data) - sum := d.checkSum() - copy(sum384[:], sum[:Size384]) - return -} |