90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
// Copyright (C) 2017. See AUTHORS.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package openssl
|
|
|
|
// #include "shim.h"
|
|
import "C"
|
|
|
|
import (
|
|
"errors"
|
|
"runtime"
|
|
"unsafe"
|
|
)
|
|
|
|
type MD5Hash struct {
|
|
ctx *C.EVP_MD_CTX
|
|
engine *Engine
|
|
}
|
|
|
|
func NewMD5Hash() (*MD5Hash, error) { return NewMD5HashWithEngine(nil) }
|
|
|
|
func NewMD5HashWithEngine(e *Engine) (*MD5Hash, error) {
|
|
hash := &MD5Hash{engine: e}
|
|
hash.ctx = C.X_EVP_MD_CTX_new()
|
|
if hash.ctx == nil {
|
|
return nil, errors.New("openssl: md5: unable to allocate ctx")
|
|
}
|
|
runtime.SetFinalizer(hash, func(hash *MD5Hash) { hash.Close() })
|
|
if err := hash.Reset(); err != nil {
|
|
return nil, err
|
|
}
|
|
return hash, nil
|
|
}
|
|
|
|
func (s *MD5Hash) Close() {
|
|
if s.ctx != nil {
|
|
C.X_EVP_MD_CTX_free(s.ctx)
|
|
s.ctx = nil
|
|
}
|
|
}
|
|
|
|
func (s *MD5Hash) Reset() error {
|
|
if C.X_EVP_DigestInit_ex(s.ctx, C.X_EVP_md5(), engineRef(s.engine)) != 1 {
|
|
return errors.New("openssl: md5: cannot init digest ctx")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *MD5Hash) Write(p []byte) (n int, err error) {
|
|
if len(p) == 0 {
|
|
return 0, nil
|
|
}
|
|
if C.X_EVP_DigestUpdate(s.ctx, unsafe.Pointer(&p[0]),
|
|
C.size_t(len(p))) != 1 {
|
|
return 0, errors.New("openssl: md5: cannot update digest")
|
|
}
|
|
return len(p), nil
|
|
}
|
|
|
|
func (s *MD5Hash) Sum() (result [16]byte, err error) {
|
|
if C.X_EVP_DigestFinal_ex(s.ctx,
|
|
(*C.uchar)(unsafe.Pointer(&result[0])), nil) != 1 {
|
|
return result, errors.New("openssl: md5: cannot finalize ctx")
|
|
}
|
|
return result, s.Reset()
|
|
}
|
|
|
|
func MD5(data []byte) (result [16]byte, err error) {
|
|
hash, err := NewMD5Hash()
|
|
if err != nil {
|
|
return result, err
|
|
}
|
|
defer hash.Close()
|
|
if _, err := hash.Write(data); err != nil {
|
|
return result, err
|
|
}
|
|
return hash.Sum()
|
|
}
|