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| package main
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"fmt"
)
func main() {
text := "abcfefghijklmnopqrst剩下的是我自己的加密内容"
key := "qwertyuiopasdfgh"
iv := []byte("bbbbbbbbbbbbbbbb")
iv2 := []byte("aaaaaaaaaaaaaaaa")
result := CBCEncrypt([]byte(text), []byte(key), iv)
fmt.Println(string(CBCDecrypt(result, []byte(key), iv2)))
}
func CBCEncrypt(text []byte, key []byte, iv []byte) []byte {
b, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
p := PKCS7Padding(text, b.BlockSize())
res := make([]byte, len(p))
cipher.NewCBCEncrypter(b, iv).CryptBlocks(res, p)
return res
}
func CBCDecrypt(t []byte, key []byte, iv []byte) []byte {
b, err := aes.NewCipher(key)
if err != nil {
panic(err)
}
res := make([]byte, len(t))
cipher.NewCBCDecrypter(b, iv).CryptBlocks(res, t)
return UnPKCS7Padding(res)
}
func PKCS7Padding(t []byte, n int) []byte {
l := n - len(t)%n
var p []byte
if l == 0 {
p = bytes.Repeat([]byte{byte(n)}, n)
} else {
p = bytes.Repeat([]byte{byte(l)}, l)
}
return append(t, p...)
}
func UnPKCS7Padding(t []byte) []byte {
return t[:(len(t) - int(t[len(t)-1]))]
}
|