55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
package tools
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import (
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"bytes"
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"crypto/aes"
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"crypto/cipher"
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)
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var Aeskey = []byte("snowywar12345678") //aeskey
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//@brief:填充明文
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func PKCS5Padding(plaintext []byte, blockSize int) []byte{
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padding := blockSize-len(plaintext)%blockSize
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padtext := bytes.Repeat([]byte{byte(padding)},padding)
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return append(plaintext,padtext...)
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}
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//@brief:去除填充数据
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func PKCS5UnPadding(origData []byte) []byte{
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length := len(origData)
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unpadding := int(origData[length-1])
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return origData[:(length - unpadding)]
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}
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//@brief:AES加密
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func AesEncrypt(origData, key []byte) ([]byte, error){
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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//AES分组长度为128位，所以blockSize=16，单位字节
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blockSize := block.BlockSize()
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origData = PKCS5Padding(origData,blockSize)
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blockMode := cipher.NewCBCEncrypter(block,key[:blockSize]) //初始向量的长度必须等于块block的长度16字节
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crypted := make([]byte, len(origData))
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blockMode.CryptBlocks(crypted,origData)
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return crypted, nil
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}
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//@brief:AES解密
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func AesDecrypt(crypted, key []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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//AES分组长度为128位，所以blockSize=16，单位字节
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blockSize := block.BlockSize()
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blockMode := cipher.NewCBCDecrypter(block, key[:blockSize]) //初始向量的长度必须等于块block的长度16字节
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origData := make([]byte, len(crypted))
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blockMode.CryptBlocks(origData, crypted)
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origData = PKCS5UnPadding(origData)
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return origData, nil
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} |