68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package response
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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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"encoding/base64"
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"pkg.local/utils"
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)
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var (
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isDebug bool
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encryptKey string
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)
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// Init 初始化响应加密相关配置（对应旧项目 base.is_debug / encrypt.encrypt_key）
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func Init(debug bool, key string) {
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isDebug = debug
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encryptKey = key
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}
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type Crypto struct{}
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// EncryptKey 加密
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func (c Crypto) EncryptKey(data []byte, key string) (map[string]string, Error) {
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info, err := c.aesCBCEncryptKey(data, key)
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if err != nil {
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return nil, err
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}
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return info, nil
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}
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func (c Crypto) aesCBCEncryptKey(data []byte, key string) (map[string]string, Error) {
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k := []byte(key)
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iv := utils.GetRandString(NumberSixteen)
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// 分组密钥
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block, err := aes.NewCipher(k)
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if err != nil {
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return nil, ErrorEncryptAesKeyError
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}
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// 获取密钥块的长度
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blockSize := block.BlockSize()
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// 补充码
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data = c.pKCS7Padding(data, blockSize)
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// 加密模式
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blockMode := cipher.NewCBCEncrypter(block, []byte(iv))
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// 创建数组
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crypted := make([]byte, len(data))
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// 加密
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blockMode.CryptBlocks(crypted, data)
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return map[string]string{
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"data": base64.StdEncoding.EncodeToString(crypted),
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"iv": iv,
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}, nil
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}
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func (c Crypto) pKCS7Padding(ciphertext []byte, blockSize int) []byte {
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// 判断缺少几位长度，最少为 1，最多为 blockSize
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padding := blockSize - len(ciphertext)%blockSize
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// 补足位数，把切片 []byte{byte(padding)} 复制 padding 个
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padtext := bytes.Repeat([]byte{byte(padding)}, padding)
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return append(ciphertext, padtext...)
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}
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