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des.go
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des.go
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package xcrypto
import (
"bytes"
"crypto/des"
"encoding/base64"
"encoding/hex"
"fmt"
)
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)
unpadding := int(origData[length-1])
return origData[:(length - unpadding)]
}
//des ECB base64加密:xcrypto.EncryptDESECB2Base64("密码", "basesoft")
func EncryptDESECB2Base64(src, key string) string {
data := []byte(src)
keyByte := []byte(key)
block, err := des.NewCipher(keyByte)
if err != nil {
panic(err)
}
bs := block.BlockSize()
data = PKCS5Padding(data, bs)
if len(data)%bs != 0 {
return ""
}
out := make([]byte, len(data))
dst := out
for len(data) > 0 {
block.Encrypt(dst, data[:bs])
data = data[bs:]
dst = dst[bs:]
}
return base64.StdEncoding.EncodeToString(out)
}
//des ECB hex加密
func EncryptDESECB2Hex(src, key string) string {
data := []byte(src)
keyByte := []byte(key)
block, err := des.NewCipher(keyByte)
if err != nil {
panic(err)
}
bs := block.BlockSize()
data = PKCS5Padding(data, bs)
if len(data)%bs != 0 {
return ""
}
out := make([]byte, len(data))
dst := out
for len(data) > 0 {
block.Encrypt(dst, data[:bs])
data = data[bs:]
dst = dst[bs:]
}
return fmt.Sprintf("%X", out)
}
//des ECB hex解密: src := xcrypto.DecryptDESECB4Hex(xcrypto.EncryptDESECB2Hex("123456", "basesoft"),"basesoft")
func DecryptDESECB4Hex(src, key string) string {
data, err := hex.DecodeString(src)
if err != nil {
return ""
}
keyByte := []byte(key)
block, err := des.NewCipher(keyByte)
if err != nil {
return ""
}
bs := block.BlockSize()
if len(data)%bs != 0 {
return ""
}
out := make([]byte, len(data))
dst := out
for len(data) > 0 {
block.Decrypt(dst, data[:bs])
data = data[bs:]
dst = dst[bs:]
}
out = PKCS5UnPadding(out)
return string(out)
}
//des ECB hex解密: src := xcrypto.DecryptDESECB4Base64(xcrypto.EncryptDESECB2Base64("hello'!@123", "basesoft"),"basesoft")
func DecryptDESECB4Base64(src, key string) string {
data, err :=base64.StdEncoding.DecodeString(src)
if err != nil {
return ""
}
keyByte := []byte(key)
block, err := des.NewCipher(keyByte)
if err != nil {
return ""
}
bs := block.BlockSize()
if len(data)%bs != 0 {
return ""
}
out := make([]byte, len(data))
dst := out
for len(data) > 0 {
block.Decrypt(dst, data[:bs])
data = data[bs:]
dst = dst[bs:]
}
out = PKCS5UnPadding(out)
return string(out)
}