初始化项目文件

api_iris/utils/aes.go

@@ -0,0 +1,70 @@
+package utils
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"encoding/base64"
+	"errors"
+)
+
+func pkcs7Padding(data []byte, blockSize int) []byte {
+	padding := blockSize - len(data)%blockSize
+	padText := bytes.Repeat([]byte{byte(padding)}, padding)
+	return append(data, padText...)
+}
+
+func pkcs7UnPadding(data []byte) ([]byte, error) {
+	length := len(data)
+	if length == 0 {
+		return nil, errors.New("加密字符串为空！")
+	}
+	unPadding := int(data[length-1])
+	return data[:(length - unPadding)], nil
+}
+
+func aesEncrypt(data []byte, key []byte) ([]byte, error) {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+	blockSize := block.BlockSize()
+	encryptBytes := pkcs7Padding(data, blockSize)
+	encrypted := make([]byte, len(encryptBytes))
+	blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
+	blockMode.CryptBlocks(encrypted, encryptBytes)
+	return encrypted, nil
+}
+
+func aesDecrypt(data []byte, key []byte) ([]byte, error) {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+	blockSize := block.BlockSize()
+	blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
+	decrypted := make([]byte, len(data))
+	blockMode.CryptBlocks(decrypted, data)
+	//fmt.Println(data, decrypted)
+	decrypted, err = pkcs7UnPadding(decrypted)
+	if err != nil {
+		return nil, err
+	}
+	return decrypted, err
+}
+
+func EncryptByAes(data []byte, key []byte) (string, error) {
+	res, err := aesEncrypt(data, key)
+	if err != nil {
+		return "", err
+	}
+	return base64.StdEncoding.EncodeToString(res), nil
+}
+
+func DecryptByAes(data string, key []byte) ([]byte, error) {
+	dataByte, err := base64.StdEncoding.DecodeString(data)
+	if err != nil {
+		return nil, err
+	}
+	return aesDecrypt(dataByte, key)
+}