package main import ( "bytes" "crypto/aes" "crypto/cipher" "encoding/base64" "fmt" ) func PKCS7Padding(ciphertext []byte, blockSize int) []byte { padding := blockSize - len(ciphertext)%blockSize padtext := bytes.Repeat([]byte{byte(padding)}, padding) return append(ciphertext, padtext...) } func PKCS7UnPadding(origData []byte) []byte { length := len(origData) unpadding := int(origData[length-1]) return origData[:(length - unpadding)] } //AES加密,CBC func AesEncrypt(origData, key []byte) ([]byte, error) { block, err := aes.NewCipher(key) if err != nil { return nil, err } blockSize := block.BlockSize() origData = PKCS7Padding(origData, blockSize) blockMode := cipher.NewCBCEncrypter(block, key[:blockSize]) crypted := make([]byte, len(origData)) blockMode.CryptBlocks(crypted, origData) return crypted, nil } //AES解密 func AesDecrypt(crypted, key []byte) ([]byte, error) { block, err := aes.NewCipher(key) if err != nil { return nil, err } blockSize := block.BlockSize() blockMode := cipher.NewCBCDecrypter(block, key[:blockSize]) origData := make([]byte, len(crypted)) blockMode.CryptBlocks(origData, crypted) origData = PKCS7UnPadding(origData) return origData, nil } func main() { text := "123456789" // 你要加密的数据 AesKey := []byte("#HvL%$o0oNNoOZnk#o2qbqCeQB1iXeIR") // 对称秘钥长度必须是16的倍数 fmt.Printf("明文: %s\n秘钥: %s\n", text, string(AesKey)) encrypted, err := AesEncrypt([]byte(text), AesKey) if err != nil { panic(err) } fmt.Printf("加密后: %s\n", base64.StdEncoding.EncodeToString(encrypted)) //encrypteds, _ := base64.StdEncoding.DecodeString("j4H4Tv5VcXv0oNLwB/fr+g==") origin, err := AesDecrypt(encrypted, AesKey) if err != nil { panic(err) } fmt.Printf("解密后明文: %s\n", string(origin)) }