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go语言实现aes-128-cbc加密和解密

关键词: golang

go语言实现aes-128-cbc加密和解密

```
package main

import (
    "bytes"
    "crypto/aes"
    "crypto/cipher"
    "encoding/base64"
    "encoding/hex"
    "log"
)

func Hex2bin(raw string) string {
    result, _ := hex.DecodeString(raw)
    return string(result)
}

func Bin2hex(raw string) string {
    return hex.EncodeToString([]byte(raw))
}

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(data []byte) []byte {
    length := len(data)
    unpadding := int(data[length - 1])
    return data[:(length - unpadding)]
}

func DryEncrypt(raw string, key string, iv string) string {
    theKey := []byte(Hex2bin(key))
    theIv := []byte(Hex2bin(iv))
    block, err := aes.NewCipher(theKey)
    if err != nil {
        log.Println(err)
    }
    mode := cipher.NewCBCEncrypter(block, theIv)
    theRaw := []byte(raw)
    theRaw = PKCS5Padding(theRaw, block.BlockSize())
    result := make([]byte, len(theRaw))
    mode.CryptBlocks(result, theRaw)
    return base64.StdEncoding.EncodeToString(result)
}

func DryDecrypt(raw string, key string, iv string) string {
    theKey := []byte(Hex2bin(key))
    theIv := []byte(Hex2bin(iv))
    block, err := aes.NewCipher(theKey)
    if err != nil {
        log.Println(err)
    }
    mode := cipher.NewCBCDecrypter(block, theIv)
    theRaw, _ := base64.StdEncoding.DecodeString(raw)
    result := make([]byte, len(theRaw))
    mode.CryptBlocks(result, theRaw)
    result = PKCS5UnPadding(result)
    return string(result)
}

func main() {
    content1 := DryEncrypt("I love 中国", "33633665306238613963313532323461", "66306235336232646130343166636134")
    content2 := DryDecrypt("Y+DFN/BE1xH0hKefUc/z6g==", "33633665306238613963313532323461", "66306235336232646130343166636134")
    log.Println(content1)
    log.Println(content2)
}
```

admin
2018-01-10 18:39:11
go

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go语言实现aes-128-cbc加密和解密