Go与php的加密通信aes-128-ecb

通过go语言进行加密，可利用php openssl扩展进行解密。

package encrypt

import (
	"bytes"
	"crypto/aes"
	"crypto/cipher"
	"encoding/base64"
	"fmt"
)

type ecb struct {
	b         cipher.Block
	blockSize int
}

func newECB(b cipher.Block) *ecb {
	return &ecb{
		b:         b,
		blockSize: b.BlockSize(),
	}
}

type ecbEncrypter ecb

// NewECBEncrypter returns a BlockMode which encrypts in electronic code book
// mode, using the given Block.
func NewECBEncrypter(b cipher.Block) cipher.BlockMode {
	return (*ecbEncrypter)(newECB(b))
}

func (x *ecbEncrypter) BlockSize() int { return x.blockSize }

func (x *ecbEncrypter) CryptBlocks(dst, src []byte) {
	if len(src)%x.blockSize != 0 {
		panic("crypto/cipher: input not full blocks")
	}
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}
	for len(src) > 0 {
		x.b.Encrypt(dst, src[:x.blockSize])
		src = src[x.blockSize:]
		dst = dst[x.blockSize:]
	}
}

type ecbDecrypter ecb

// NewECBDecrypter returns a BlockMode which decrypts in electronic code book
// mode, using the given Block.
func NewECBDecrypter(b cipher.Block) cipher.BlockMode {
	return (*ecbDecrypter)(newECB(b))
}

func (x *ecbDecrypter) BlockSize() int { return x.blockSize }

func (x *ecbDecrypter) CryptBlocks(dst, src []byte) {
	if len(src)%x.blockSize != 0 {
		panic("crypto/cipher: input not full blocks")
	}
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}
	for len(src) > 0 {
		x.b.Decrypt(dst, src[:x.blockSize])
		src = src[x.blockSize:]
		dst = dst[x.blockSize:]
	}
}

func encodeBase64(b []byte) string {
	return base64.StdEncoding.EncodeToString(b)
}

func decodeBase64(s string) []byte {
	data, err := base64.StdEncoding.DecodeString(s)
	if err != nil {
		panic(err)
	}
	return data
}

func PKCS5Padding(ciphertext []byte, blockSize int) []byte {
	padding := blockSize - len(ciphertext)%blockSize
	padtext := bytes.Repeat([]byte{byte(padding)}, padding)
	return append(ciphertext, padtext...)
}
func PKCS5UnPadding(origData []byte) []byte {
	length := len(origData)
	// 去掉最后一个字节 unpadding 次
	unpadding := int(origData[length-1])
	return origData[:(length - unpadding)]
}
func EncryptECB(src string, hexKey string) string {
	var hasError = false
	block, err := aes.NewCipher([]byte(hexKey))
	if err != nil {
		fmt.Println("key error")
		hasError = true
	}

	if src == "" {
		fmt.Println("plain content empty")
		hasError = true
	}

	if hasError {
		return ""
	}
	ecbn := NewECBEncrypter(block)
	content := []byte(src)
	content = PKCS5Padding(content, block.BlockSize())
	crypted := make([]byte, len(content))
	ecbn.CryptBlocks(crypted, content)
	return base64.StdEncoding.EncodeToString(crypted)
}
func DecryptECB(src string, hexKey string) string {
	var hasError = false
	block, err := aes.NewCipher([]byte(hexKey))
	if err != nil {
		fmt.Println("key error")
		hasError = true
	}

	if src == "" {
		fmt.Println("plain content empty")
		hasError = true
	}

	if hasError {
		return ""
	}
	ecbn := NewECBDecrypter(block)
	content := decodeBase64(src)
	//fmt.Println(content)
	//content = PKCS5Padding(content, block.BlockSize())
	crypted := make([]byte, len(content))
	ecbn.CryptBlocks(crypted, content)
	return string(PKCS5UnPadding(crypted))
}