1 files changed, 163 insertions, 0 deletions
diff --git a/libgo/go/crypto/sha512/sha512.go b/libgo/go/crypto/sha512/sha512.go
new file mode 100644
index 000000000..c3cda97d9
--- /dev/null
+++ b/libgo/go/crypto/sha512/sha512.go
@@ -0,0 +1,163 @@
+// 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.
+
+// This package implements the SHA384 and SHA512 hash algorithms as defined in FIPS 180-2.
+package sha512
+
+import (
+	"hash"
+	"os"
+)
+
+// The size of a SHA512 checksum in bytes.
+const Size = 64
+
+// The size of a SHA384 checksum in bytes.
+const Size384 = 48
+
+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) Write(p []byte) (nn int, err os.Error) {
+	nn = len(p)
+	d.len += uint64(nn)
+	if d.nx > 0 {
+		n := len(p)
+		if n > _Chunk-d.nx {
+			n = _Chunk - d.nx
+		}
+		for i := 0; i < n; i++ {
+			d.x[d.nx+i] = p[i]
+		}
+		d.nx += n
+		if d.nx == _Chunk {
+			_Block(d, d.x[0:])
+			d.nx = 0
+		}
+		p = p[n:]
+	}
+	n := _Block(d, p)
+	p = p[n:]
+	if len(p) > 0 {
+		d.nx = copy(d.x[:], p)
+	}
+	return
+}
+
+func (d0 *digest) Sum() []byte {
+	// Make a copy of d0 so that caller can keep writing and summing.
+	d := new(digest)
+	*d = *d0
+
+	// 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")
+	}
+
+	p := make([]byte, 64)
+	j := 0
+	for _, s := range d.h {
+		p[j+0] = byte(s >> 56)
+		p[j+1] = byte(s >> 48)
+		p[j+2] = byte(s >> 40)
+		p[j+3] = byte(s >> 32)
+		p[j+4] = byte(s >> 24)
+		p[j+5] = byte(s >> 16)
+		p[j+6] = byte(s >> 8)
+		p[j+7] = byte(s >> 0)
+		j += 8
+	}
+	if d.is384 {
+		return p[0:48]
+	}
+	return p
+}