mirror of
https://gitee.com/blackfox/geekai.git
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92 lines
1.9 KiB
Go
92 lines
1.9 KiB
Go
package utils
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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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"crypto/md5"
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"errors"
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"fmt"
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"io"
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)
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// AesEncrypt 加密
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func AesEncrypt(keyStr string, data []byte) (string, error) {
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//创建加密实例
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key := []byte(keyStr)
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block, err := aes.NewCipher(key)
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if err != nil {
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return "", err
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}
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blockSize := block.BlockSize()
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encryptBytes := pkcs7Padding(data, blockSize)
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result := make([]byte, len(encryptBytes))
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//使用cbc加密模式
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blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
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//执行加密
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blockMode.CryptBlocks(result, encryptBytes)
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return base64.StdEncoding.EncodeToString(result), nil
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}
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// AesDecrypt 解密
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func AesDecrypt(keyStr string, dataStr string) ([]byte, error) {
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//创建实例
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key := []byte(keyStr)
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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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data, err := base64.StdEncoding.DecodeString(dataStr)
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if err != nil {
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return nil, err
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}
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blockSize := block.BlockSize()
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blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
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result := make([]byte, len(data))
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//执行解密
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blockMode.CryptBlocks(result, data)
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//去除填充
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result, err = pkcs7UnPadding(result)
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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func pkcs7Padding(data []byte, blockSize int) []byte {
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padding := blockSize - len(data)%blockSize
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padText := bytes.Repeat([]byte{byte(padding)}, padding)
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return append(data, padText...)
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}
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func pkcs7UnPadding(data []byte) ([]byte, error) {
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length := len(data)
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if length == 0 {
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return nil, errors.New("empty encrypt data")
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}
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unPadding := int(data[length-1])
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return data[:(length - unPadding)], nil
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}
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func Sha256(data string) string {
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hash := sha256.New()
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_, err := io.WriteString(hash, data)
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if err != nil {
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return ""
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}
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hashValue := hash.Sum(nil)
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return fmt.Sprintf("%x", hashValue)
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}
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func Md5(data string) string {
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md5bs := md5.Sum([]byte(data))
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return hex.EncodeToString(md5bs[:])
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}
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