最近项目中golang项目中使用aes加解密，做个记录方便以后使用

aes-cbc-pkcs7加密解密base64输入输出

type AesBase64 struct {key []byte // 允许16,24,32字节长度iv  []byte // 只允许16字节长度
}func NewAesBase64(key []byte, iv []byte) *AesBase64 {return &AesBase64{iv:  iv,key: key,}
}func (s *AesBase64) Encrypt(text []byte) (string, error) {if len(text) == 0 {return "", nil}//生成cipher.Block 数据块block, err := aes.NewCipher(s.key)if err != nil {return "", err}//填充内容，如果不足16位字符blockSize := block.BlockSize()originData := s.pad(text, blockSize)//加密方式blockMode := cipher.NewCBCEncrypter(block, s.iv)//加密，输出到[]byte数组crypted := make([]byte, len(originData))blockMode.CryptBlocks(crypted, originData)return base64.StdEncoding.EncodeToString(crypted), nil
}func (s *AesBase64) Decrypt(text string) ([]byte, error) {if len(text) == 0 {return []byte(text), nil}decodeData, err := base64.StdEncoding.DecodeString(text)if err != nil {return []byte(text), err}if len(decodeData) == 0 {return []byte(text), nil}//生成密码数据块cipher.Blockblock, _ := aes.NewCipher(s.key)//解密模式blockMode := cipher.NewCBCDecrypter(block, s.iv)//输出到[]byte数组originData := make([]byte, len(decodeData))blockMode.CryptBlocks(originData, decodeData)//去除填充,并返回return s.unPad(originData), nil
}func (s *AesBase64) pad(ciphertext []byte, blockSize int) []byte {padding := blockSize - len(ciphertext)%blockSizepadText := bytes.Repeat([]byte{byte(padding)}, padding)return append(ciphertext, padText...)
}func (s *AesBase64) unPad(ciphertext []byte) []byte {length := len(ciphertext)// 去掉最后一次的paddingunPadding := int(ciphertext[length-1])return ciphertext[:(length - unPadding)]
}

aes-cbc-pkcs7加密解密hex字符串输入输出

type AesHex struct {key []byte // 允许16,24,32字节长度iv  []byte // 只允许16字节长度
}func NewAesHex(key []byte, iv []byte) *AesHex {return &AesHex{iv:  iv,key: key,}
}func (s *AesHex) Encrypt(text []byte) (string, error) {if len(text) == 0 {return "", nil}//生成cipher.Block 数据块block, err := aes.NewCipher(s.key)if err != nil {return "", err}//填充内容，如果不足16位字符blockSize := block.BlockSize()originData := s.pad(text, blockSize)//加密方式blockMode := cipher.NewCBCEncrypter(block, s.iv)//加密，输出到[]byte数组crypted := make([]byte, len(originData))blockMode.CryptBlocks(crypted, originData)return hex.EncodeToString(crypted), nil
}func (s *AesHex) Decrypt(text string) ([]byte, error) {if len(text) == 0 {return []byte(text), nil}decodeData, err := hex.DecodeString(text)if err != nil {return []byte(text), err}if len(decodeData) == 0 {return []byte(text), nil}//生成密码数据块cipher.Blockblock, _ := aes.NewCipher(s.key)//解密模式blockMode := cipher.NewCBCDecrypter(block, s.iv)//输出到[]byte数组originData := make([]byte, len(decodeData))blockMode.CryptBlocks(originData, decodeData)//去除填充,并返回return s.unPad(originData), nil
}func (s *AesHex) pad(ciphertext []byte, blockSize int) []byte {padding := blockSize - len(ciphertext)%blockSizepadText := bytes.Repeat([]byte{byte(padding)}, padding)return append(ciphertext, padText...)
}func (s *AesHex) unPad(ciphertext []byte) []byte {length := len(ciphertext)// 去掉最后一次的paddingunPadding := int(ciphertext[length-1])return ciphertext[:(length - unPadding)]
}

原文仓库地址：https://github.com/yanue/aes-cbc-pkcs7