Java默认DES算法使用DES/ECB/PKCS5Padding，而golang认为这种方式是不安全的，所以故意没有提供这种加密方式，那如果我们还是要用到怎么办？下面贴上golang版的DES ECB加密解密代码（默认对密文做了base64处理）。
package main import (
log "ad-service/alog"
"bytes"
"crypto/des"
"encoding/base64"
) func EntryptDesECB(data, key []byte) string {
if len(key) > {
key = key[:]
}
block, err := des.NewCipher(key)
if err != nil {
log.Errorf("EntryptDesECB newCipher error[%v]", err)
return ""
}
bs := block.BlockSize()
data = PKCS5Padding(data, bs)
if len(data)%bs != {
log.Error("EntryptDesECB Need a multiple of the blocksize")
return ""
}
out := make([]byte, len(data))
dst := out
for len(data) > {
block.Encrypt(dst, data[:bs])
data = data[bs:]
dst = dst[bs:]
}
return base64.StdEncoding.EncodeToString(out)
}
func DecryptDESECB(d, key []byte) string {
data, err := base64.StdEncoding.DecodeString(d)
if err != nil {
log.Errorf("DecryptDES Decode base64 error[%v]", err)
return ""
}
if len(key) > {
key = key[:]
}
block, err := des.NewCipher(key)
if err != nil {
log.Errorf("DecryptDES NewCipher error[%v]", err)
return ""
}
bs := block.BlockSize()
if len(data)%bs != {
log.Error("DecryptDES crypto/cipher: input not full blocks")
return ""
}
out := make([]byte, len(data))
dst := out
for len(data) > {
block.Decrypt(dst, data[:bs])
data = data[bs:]
dst = dst[bs:]
}
out = PKCS5UnPadding(out)
return string(out)
} 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-])
return origData[:(length - unpadding)]
}