103 lines
2.3 KiB
Go
103 lines
2.3 KiB
Go
package crypto
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"encoding/base64"
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"encoding/hex"
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"errors"
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"io"
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)
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// TianyuanEncrypt 天远数据AES-128-CBC加密，返回Base64编码的字符串
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// 与Node.js中的aesEncrypt函数对应
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func TianyuanEncrypt(plainText []byte, keyHex string) (string, error) {
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// 将16进制密钥转换为字节
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keyBuffer, err := hex.DecodeString(keyHex)
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if err != nil {
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return "", err
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}
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// 创建AES密码器
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block, err := aes.NewCipher(keyBuffer)
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if err != nil {
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return "", err
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}
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blockSize := block.BlockSize() // AES块大小为16字节
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// 生成随机IV
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iv := make([]byte, blockSize)
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if _, err := io.ReadFull(rand.Reader, iv); err != nil {
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return "", err
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}
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// 创建CBC加密器
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mode := cipher.NewCBCEncrypter(block, iv)
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// PKCS7填充
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paddedText := PKCS7Padding(plainText, blockSize)
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// 加密
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encrypted := make([]byte, len(paddedText))
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mode.CryptBlocks(encrypted, paddedText)
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// 将IV和加密数据连接在一起，然后Base64编码
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result := append(iv, encrypted...)
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return base64.StdEncoding.EncodeToString(result), nil
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}
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// TianyuanDecrypt 天远数据AES-128-CBC解密，返回解密后的字节数组
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// 与Node.js中的aesDecrypt函数对应
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func TianyuanDecrypt(encryptedText, keyHex string) ([]byte, error) {
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// 将16进制密钥转换为字节
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keyBuffer, err := hex.DecodeString(keyHex)
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if err != nil {
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return nil, err
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}
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// Base64解码
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encryptedBuffer, err := base64.StdEncoding.DecodeString(encryptedText)
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if err != nil {
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return nil, err
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}
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// 创建AES密码器
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block, err := aes.NewCipher(keyBuffer)
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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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// 检查数据长度
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if len(encryptedBuffer) < blockSize {
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return nil, errors.New("encrypted text too short")
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}
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// 提取IV和加密数据
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iv := encryptedBuffer[:blockSize]
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encryptedData := encryptedBuffer[blockSize:]
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// 检查加密数据长度是否为块大小的倍数
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if len(encryptedData)%blockSize != 0 {
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return nil, errors.New("encrypted data is not a multiple of the block size")
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}
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// 创建CBC解密器
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mode := cipher.NewCBCDecrypter(block, iv)
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// 解密
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decrypted := make([]byte, len(encryptedData))
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mode.CryptBlocks(decrypted, encryptedData)
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// 去除PKCS7填充
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result, err := PKCS7UnPadding(decrypted)
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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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