Harshavardhana
10 years ago
parent
e2bc6c8b27
commit
12cff1be58
@ -1,83 +1,150 @@ |
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/* |
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* Mini Object Storage, (C) 2014 Minio, Inc. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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|
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// Package sha1 implements the SHA1 hash algorithm as defined in RFC 3174.
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package sha1 |
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// #include <stdio.h>
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// #include <stdint.h>
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// void sha1_transform(int32_t *hash, const char* input, size_t num_blocks);
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import "C" |
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import ( |
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gosha1 "crypto/sha1" |
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"hash" |
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"io" |
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"github.com/minio-io/minio/pkg/utils/cpu" |
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) |
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/* |
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// The size of a SHA1 checksum in bytes.
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const Size = 20 |
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// The blocksize of SHA1 in bytes.
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const BlockSize = 64 |
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const ( |
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SHA1_BLOCKSIZE = 64 |
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SHA1_DIGESTSIZE = 20 |
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chunk = 64 |
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init0 = 0x67452301 |
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init1 = 0xEFCDAB89 |
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init2 = 0x98BADCFE |
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init3 = 0x10325476 |
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init4 = 0xC3D2E1F0 |
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) |
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// digest represents the partial evaluation of a checksum.
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type digest struct { |
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h [5]uint32 |
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x [chunk]byte |
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nx int |
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len uint64 |
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} |
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func (d *digest) Reset() { |
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d.h[0] = init0 |
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d.h[1] = init1 |
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d.h[2] = init2 |
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d.h[3] = init3 |
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d.h[4] = init4 |
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d.nx = 0 |
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d.len = 0 |
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} |
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// New returns a new hash.Hash computing the SHA1 checksum.
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func New() hash.Hash { |
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d := new(digest) |
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d.Reset() |
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return d |
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} |
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func block(dig *digest, p []byte) { |
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switch true { |
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case cpu.HasAVX2() == true: |
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blockAVX2(dig, p) |
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default: |
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blockGeneric(dig, p) |
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} |
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} |
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func (d *digest) Size() int { return Size } |
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func (d *digest) BlockSize() int { return BlockSize } |
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func Sha1(buffer []byte) ([]int32, error) { |
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if cpu.HasAVX2() { |
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var shbuf []int32 |
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var cbuffer *C.char |
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func (d *digest) Write(p []byte) (nn int, err error) { |
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nn = len(p) |
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d.len += uint64(nn) |
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if d.nx > 0 { |
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n := copy(d.x[d.nx:], p) |
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d.nx += n |
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if d.nx == chunk { |
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block(d, d.x[:]) |
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d.nx = 0 |
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} |
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p = p[n:] |
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} |
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if len(p) >= chunk { |
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n := len(p) &^ (chunk - 1) |
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block(d, p[:n]) |
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p = p[n:] |
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} |
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if len(p) > 0 { |
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d.nx = copy(d.x[:], p) |
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} |
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return |
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} |
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shbuf = make([]int32, SHA1_DIGESTSIZE) |
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var length = len(buffer) |
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if length == 0 { |
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return []int32{0}, errors.New("Invalid input") |
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func (d0 *digest) Sum(in []byte) []byte { |
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// Make a copy of d0 so that caller can keep writing and summing.
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d := *d0 |
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hash := d.checkSum() |
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return append(in, hash[:]...) |
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} |
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rem := length % SHA1_BLOCKSIZE |
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padded_len := length |
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func (d *digest) checkSum() [Size]byte { |
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len := d.len |
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// Padding. Add a 1 bit and 0 bits until 56 bytes mod 64.
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var tmp [64]byte |
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tmp[0] = 0x80 |
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if len%64 < 56 { |
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d.Write(tmp[0 : 56-len%64]) |
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} else { |
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d.Write(tmp[0 : 64+56-len%64]) |
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} |
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if rem > 0 { |
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padded_len = length + (SHA1_BLOCKSIZE - rem) |
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// Length in bits.
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len <<= 3 |
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for i := uint(0); i < 8; i++ { |
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tmp[i] = byte(len >> (56 - 8*i)) |
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} |
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d.Write(tmp[0:8]) |
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rounds := padded_len / SHA1_BLOCKSIZE |
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pad := padded_len - length |
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if pad > 0 { |
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s := make([]byte, pad) |
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// Expand with new padded blocks to the byte array
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buffer = append(buffer, s...) |
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if d.nx != 0 { |
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panic("d.nx != 0") |
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} |
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cshbuf := (*C.int32_t)(unsafe.Pointer(&shbuf[0])) |
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cbuffer = (*C.char)(unsafe.Pointer(&buffer[0])) |
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C.sha1_transform(cshbuf, cbuffer, C.size_t(rounds)) |
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var digest [Size]byte |
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for i, s := range d.h { |
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digest[i*4] = byte(s >> 24) |
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digest[i*4+1] = byte(s >> 16) |
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digest[i*4+2] = byte(s >> 8) |
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digest[i*4+3] = byte(s) |
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} |
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return 0, nil |
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return digest |
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} |
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// Convenience functions
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func Sum1(data []byte) [Size]byte { |
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var d digest |
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d.Reset() |
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d.Write(data) |
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return d.checkSum() |
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} |
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*/ |
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func Sum(reader io.Reader) ([]byte, error) { |
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hash := gosha1.New() |
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h := New() |
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var err error |
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for err == nil { |
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length := 0 |
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byteBuffer := make([]byte, 1024*1024) |
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length, err = reader.Read(byteBuffer) |
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byteBuffer = byteBuffer[0:length] |
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hash.Write(byteBuffer) |
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h.Write(byteBuffer) |
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} |
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if err != io.EOF { |
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return nil, err |
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} |
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return hash.Sum(nil), nil |
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return h.Sum(nil), nil |
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} |
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@ -0,0 +1,49 @@ |
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// +build ignore
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package main |
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import ( |
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"crypto/sha1" |
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"encoding/hex" |
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"fmt" |
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"io" |
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"os" |
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"time" |
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sha1intel "github.com/minio-io/minio/pkg/utils/crypto/sha1" |
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) |
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func Sum(reader io.Reader) ([]byte, error) { |
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k := sha1.New() |
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var err error |
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for err == nil { |
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length := 0 |
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byteBuffer := make([]byte, 1024*1024) |
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length, err = reader.Read(byteBuffer) |
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byteBuffer = byteBuffer[0:length] |
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k.Write(byteBuffer) |
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} |
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if err != io.EOF { |
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return nil, err |
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} |
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return k.Sum(nil), nil |
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} |
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func main() { |
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fmt.Println("-- start") |
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file1, _ := os.Open("filename1") |
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defer file1.Close() |
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stark := time.Now() |
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sum, _ := Sum(file1) |
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endk := time.Since(stark) |
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file2, _ := os.Open("filename2") |
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defer file2.Close() |
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starth := time.Now() |
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sumAVX2, _ := sha1intel.Sum(file2) |
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endh := time.Since(starth) |
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fmt.Println("std(", endk, ")", "avx2(", endh, ")") |
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fmt.Println(hex.EncodeToString(sum), hex.EncodeToString(sumAVX2)) |
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} |
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@ -1,23 +1,125 @@ |
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// SHA1 hash algorithm. See RFC 3174.
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package sha1 |
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import ( |
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"bytes" |
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"encoding/hex" |
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"crypto/rand" |
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"fmt" |
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"io" |
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"testing" |
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. "gopkg.in/check.v1" |
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) |
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func Test(t *testing.T) { TestingT(t) } |
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type sha1Test struct { |
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out string |
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in string |
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} |
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var golden = []sha1Test{ |
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{"da39a3ee5e6b4b0d3255bfef95601890afd80709", ""}, |
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{"86f7e437faa5a7fce15d1ddcb9eaeaea377667b8", "a"}, |
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{"da23614e02469a0d7c7bd1bdab5c9c474b1904dc", "ab"}, |
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{"a9993e364706816aba3e25717850c26c9cd0d89d", "abc"}, |
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{"81fe8bfe87576c3ecb22426f8e57847382917acf", "abcd"}, |
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{"03de6c570bfe24bfc328ccd7ca46b76eadaf4334", "abcde"}, |
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{"1f8ac10f23c5b5bc1167bda84b833e5c057a77d2", "abcdef"}, |
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{"2fb5e13419fc89246865e7a324f476ec624e8740", "abcdefg"}, |
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{"425af12a0743502b322e93a015bcf868e324d56a", "abcdefgh"}, |
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{"c63b19f1e4c8b5f76b25c49b8b87f57d8e4872a1", "abcdefghi"}, |
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{"d68c19a0a345b7eab78d5e11e991c026ec60db63", "abcdefghij"}, |
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{"ebf81ddcbe5bf13aaabdc4d65354fdf2044f38a7", "Discard medicine more than two years old."}, |
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{"e5dea09392dd886ca63531aaa00571dc07554bb6", "He who has a shady past knows that nice guys finish last."}, |
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{"45988f7234467b94e3e9494434c96ee3609d8f8f", "I wouldn't marry him with a ten foot pole."}, |
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{"55dee037eb7460d5a692d1ce11330b260e40c988", "Free! Free!/A trip/to Mars/for 900/empty jars/Burma Shave"}, |
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{"b7bc5fb91080c7de6b582ea281f8a396d7c0aee8", "The days of the digital watch are numbered. -Tom Stoppard"}, |
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{"c3aed9358f7c77f523afe86135f06b95b3999797", "Nepal premier won't resign."}, |
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{"6e29d302bf6e3a5e4305ff318d983197d6906bb9", "For every action there is an equal and opposite government program."}, |
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{"597f6a540010f94c15d71806a99a2c8710e747bd", "His money is twice tainted: 'taint yours and 'taint mine."}, |
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{"6859733b2590a8a091cecf50086febc5ceef1e80", "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977"}, |
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{"514b2630ec089b8aee18795fc0cf1f4860cdacad", "It's a tiny change to the code and not completely disgusting. - Bob Manchek"}, |
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{"c5ca0d4a7b6676fc7aa72caa41cc3d5df567ed69", "size: a.out: bad magic"}, |
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{"74c51fa9a04eadc8c1bbeaa7fc442f834b90a00a", "The major problem is with sendmail. -Mark Horton"}, |
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{"0b4c4ce5f52c3ad2821852a8dc00217fa18b8b66", "Give me a rock, paper and scissors and I will move the world. CCFestoon"}, |
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{"3ae7937dd790315beb0f48330e8642237c61550a", "If the enemy is within range, then so are you."}, |
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{"410a2b296df92b9a47412b13281df8f830a9f44b", "It's well we cannot hear the screams/That we create in others' dreams."}, |
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{"841e7c85ca1adcddbdd0187f1289acb5c642f7f5", "You remind me of a TV show, but that's all right: I watch it anyway."}, |
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{"163173b825d03b952601376b25212df66763e1db", "C is as portable as Stonehedge!!"}, |
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{"32b0377f2687eb88e22106f133c586ab314d5279", "Even if I could be Shakespeare, I think I should still choose to be Faraday. - A. Huxley"}, |
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{"0885aaf99b569542fd165fa44e322718f4a984e0", "The fugacity of a constituent in a mixture of gases at a given temperature is proportional to its mole fraction. Lewis-Randall Rule"}, |
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{"6627d6904d71420b0bf3886ab629623538689f45", "How can you write a big system without C++? -Paul Glick"}, |
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} |
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func TestGolden(t *testing.T) { |
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for i := 0; i < len(golden); i++ { |
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g := golden[i] |
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s := fmt.Sprintf("%x", Sum1([]byte(g.in))) |
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if s != g.out { |
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t.Fatalf("Sum function: sha1(%s) = %s want %s", g.in, s, g.out) |
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} |
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c := New() |
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for j := 0; j < 3; j++ { |
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if j < 2 { |
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io.WriteString(c, g.in) |
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} else { |
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io.WriteString(c, g.in[0:len(g.in)/2]) |
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c.Sum(nil) |
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io.WriteString(c, g.in[len(g.in)/2:]) |
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} |
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s := fmt.Sprintf("%x", c.Sum(nil)) |
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if s != g.out { |
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t.Fatalf("sha1[%d](%s) = %s want %s", j, g.in, s, g.out) |
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} |
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c.Reset() |
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} |
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} |
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} |
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type MySuite struct{} |
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func TestSize(t *testing.T) { |
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c := New() |
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if got := c.Size(); got != Size { |
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t.Errorf("Size = %d; want %d", got, Size) |
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} |
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} |
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var _ = Suite(&MySuite{}) |
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func TestBlockSize(t *testing.T) { |
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c := New() |
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if got := c.BlockSize(); got != BlockSize { |
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t.Errorf("BlockSize = %d; want %d", got, BlockSize) |
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} |
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} |
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// Tests that blockGeneric (pure Go) and block (in assembly for amd64, 386, arm) match.
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func TestBlockGeneric(t *testing.T) { |
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gen, asm := New().(*digest), New().(*digest) |
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buf := make([]byte, BlockSize*20) // arbitrary factor
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rand.Read(buf) |
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blockGeneric(gen, buf) |
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block(asm, buf) |
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if *gen != *asm { |
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t.Error("block and blockGeneric resulted in different states") |
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} |
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} |
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var bench = New() |
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var buf = make([]byte, 8192) |
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func benchmarkSize(b *testing.B, size int) { |
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b.SetBytes(int64(size)) |
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sum := make([]byte, bench.Size()) |
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for i := 0; i < b.N; i++ { |
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bench.Reset() |
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bench.Write(buf[:size]) |
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bench.Sum(sum[:0]) |
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} |
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} |
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func BenchmarkHash8Bytes(b *testing.B) { |
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benchmarkSize(b, 8) |
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} |
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func BenchmarkHash1K(b *testing.B) { |
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benchmarkSize(b, 1024) |
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} |
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func (s *MySuite) TestStreamingSha1(c *C) { |
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testString := []byte("Test string") |
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expectedHash, _ := hex.DecodeString("18af819125b70879d36378431c4e8d9bfa6a2599") |
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hash, err := Sum(bytes.NewBuffer(testString)) |
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c.Assert(err, IsNil) |
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c.Assert(bytes.Equal(expectedHash, hash), Equals, true) |
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func BenchmarkHash8K(b *testing.B) { |
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benchmarkSize(b, 8192) |
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} |
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@ -0,0 +1,98 @@ |
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// +build amd64
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package sha1 |
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// #cgo CFLAGS: -DHAS_AVX2
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// #include <stdint.h>
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// #include <stdlib.h>
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// void sha1_transform(int32_t *hash, const char* input, size_t num_blocks);
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import "C" |
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import "unsafe" |
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const ( |
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_K0 = 0x5A827999 |
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_K1 = 0x6ED9EBA1 |
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_K2 = 0x8F1BBCDC |
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_K3 = 0xCA62C1D6 |
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) |
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func blockAVX2(dig *digest, p []byte) { |
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C.sha1_transform((*C.int32_t)(unsafe.Pointer(&dig.h[0])), (*C.char)(unsafe.Pointer(&p[0])), (C.size_t)(len(p)/chunk)) |
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} |
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// blockGeneric is a portable, pure Go version of the SHA1 block step.
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// It's used by sha1block_generic.go and tests.
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func blockGeneric(dig *digest, p []byte) { |
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var w [16]uint32 |
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h0, h1, h2, h3, h4 := dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4] |
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for len(p) >= chunk { |
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// Can interlace the computation of w with the
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// rounds below if needed for speed.
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for i := 0; i < 16; i++ { |
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j := i * 4 |
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w[i] = uint32(p[j])<<24 | uint32(p[j+1])<<16 | uint32(p[j+2])<<8 | uint32(p[j+3]) |
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} |
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a, b, c, d, e := h0, h1, h2, h3, h4 |
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// Each of the four 20-iteration rounds
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// differs only in the computation of f and
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// the choice of K (_K0, _K1, etc).
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i := 0 |
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for ; i < 16; i++ { |
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f := b&c | (^b)&d |
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a5 := a<<5 | a>>(32-5) |
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b30 := b<<30 | b>>(32-30) |
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t := a5 + f + e + w[i&0xf] + _K0 |
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a, b, c, d, e = t, a, b30, c, d |
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} |
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for ; i < 20; i++ { |
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tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] |
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w[i&0xf] = tmp<<1 | tmp>>(32-1) |
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f := b&c | (^b)&d |
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a5 := a<<5 | a>>(32-5) |
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b30 := b<<30 | b>>(32-30) |
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t := a5 + f + e + w[i&0xf] + _K0 |
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a, b, c, d, e = t, a, b30, c, d |
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} |
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for ; i < 40; i++ { |
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tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] |
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w[i&0xf] = tmp<<1 | tmp>>(32-1) |
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f := b ^ c ^ d |
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a5 := a<<5 | a>>(32-5) |
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b30 := b<<30 | b>>(32-30) |
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t := a5 + f + e + w[i&0xf] + _K1 |
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a, b, c, d, e = t, a, b30, c, d |
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} |
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for ; i < 60; i++ { |
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tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] |
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w[i&0xf] = tmp<<1 | tmp>>(32-1) |
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f := ((b | c) & d) | (b & c) |
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|
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a5 := a<<5 | a>>(32-5) |
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b30 := b<<30 | b>>(32-30) |
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t := a5 + f + e + w[i&0xf] + _K2 |
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a, b, c, d, e = t, a, b30, c, d |
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} |
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for ; i < 80; i++ { |
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tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf] |
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w[i&0xf] = tmp<<1 | tmp>>(32-1) |
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f := b ^ c ^ d |
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a5 := a<<5 | a>>(32-5) |
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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 |
||||
} |
||||
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Reference in new issue