func padding(src []byte,blocksize int) []byte {
padnum:=blocksize-len(src)%blocksize
pad:=bytes.Repeat([]byte{byte(padnum)},padnum)
return append(src,pad...)
}
func unpadding(src []byte) []byte {
n:=len(src)
unpadnum:=int(src[n-1])
return src[:n-unpadnum]
}
func encryptAES(src []byte,key []byte) []byte {
block,_:=aes.NewCipher(key)
src=padding(src,block.BlockSize())
blockmode:=cipher.NewCBCEncrypter(block,key)
blockmode.CryptBlocks(src,src)
return src
}
func decryptAES(src []byte,key []byte) []byte {
block,_:=aes.NewCipher(key)
blockmode:=cipher.NewCBCDecrypter(block,key)
blockmode.CryptBlocks(src,src)
src=unpadding(src)
return src
}