1701 lines
56 KiB
Markdown
1701 lines
56 KiB
Markdown
。
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现在我来生成完整的 SDK 代码。根据文档，我需要：
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1. 签名规则：拼接 app_id + timestamp + ciphertext，然后用 RSA 私钥签名
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2. 加密规则：业务参数去掉零值，按字母排序，转 JSON，然后用 AES-ECB 或 SM4-CBC 加密
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3. 时间戳格式：yyyy-MM-dd HH:mm:ss
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让我生成所有 6 个文件。
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// File: ymt_v3/go.mod
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```
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module ymt_v3
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go 1.21
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require github.com/tjfoc/gmsm v1.4.1
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```
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// File: ymt_v3/errors.go
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```go
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package ymt_v3
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import "fmt"
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// APIError 表示API返回的错误
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type APIError struct {
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Code int32 `json:"code"`
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Message string `json:"message"`
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Reason string `json:"reason,omitempty"`
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}
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func (e *APIError) Error() string {
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if e.Reason != "" {
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return fmt.Sprintf("code=%d, message=%s, reason=%s", e.Code, e.Message, e.Reason)
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}
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return fmt.Sprintf("code=%d, message=%s", e.Code, e.Message)
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}
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```
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// File: ymt_v3/types.go
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```go
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package ymt_v3
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// 请求/响应结构体
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// OrderRequest 获取券码请求（业务明文）
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type OrderRequest struct {
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OutBizNo string `json:"out_biz_no"`
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ActivityNo string `json:"activity_no"`
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Account string `json:"account,omitempty"`
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NotifyURL string `json:"notify_url,omitempty"`
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}
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// OrderResponse 获取券码/券码查询响应（解密后）
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type OrderResponse struct {
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OutBizNo string `json:"out_biz_no"`
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TradeNo string `json:"trade_no"`
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Key string `json:"key,omitempty"`
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URL string `json:"url,omitempty"`
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ValidBeginTime string `json:"valid_begin_time,omitempty"`
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ValidEndTime string `json:"valid_end_time,omitempty"`
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UsableNum uint32 `json:"usable_num"`
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UsageNum uint32 `json:"usage_num"`
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Status uint32 `json:"status"`
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SettlementPrice float64 `json:"settlement_price,omitempty"`
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Account string `json:"account,omitempty"`
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}
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// QueryRequest 券码查询请求（业务明文）
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type QueryRequest struct {
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OutBizNo string `json:"out_biz_no,omitempty"`
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TradeNo string `json:"trade_no,omitempty"`
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}
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// DiscardRequest 券码作废请求（业务明文）
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type DiscardRequest struct {
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OutBizNo string `json:"out_biz_no,omitempty"`
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TradeNo string `json:"trade_no,omitempty"`
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}
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// DiscardResponse 券码作废响应（解密后）
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type DiscardResponse struct {
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OutBizNo string `json:"out_biz_no"`
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TradeNo string `json:"trade_no"`
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Status uint32 `json:"status"`
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}
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// BatchOrderRequest 批量发卡请求（业务明文）
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type BatchOrderRequest struct {
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OutBizNo string `json:"out_biz_no"`
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ActivityNo string `json:"activity_no"`
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Number int32 `json:"number"`
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NotifyURL string `json:"notify_url,omitempty"`
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}
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// BatchOrderResponse 批量发卡响应（解密后）
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type BatchOrderResponse struct {
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OutBizNo string `json:"out_biz_no"`
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TradeNo string `json:"trade_no"`
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Status string `json:"status"`
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}
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// BatchQueryRequest 批量查询请求（业务明文）
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type BatchQueryRequest struct {
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OutBizNo string `json:"out_biz_no,omitempty"`
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TradeNo string `json:"trade_no,omitempty"`
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}
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// BatchQueryResponse 批量查询响应（解密后）
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type BatchQueryResponse struct {
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OutBizNo string `json:"out_biz_no"`
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TradeNo string `json:"trade_no"`
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Status string `json:"status"`
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DownloadURL string `json:"download_url,omitempty"`
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ZipPassword string `json:"zip_password,omitempty"`
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}
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// 公共请求体
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type EncryptedRequest struct {
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Ciphertext string `json:"ciphertext"`
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}
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// 公共响应体
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type EncryptedResponse struct {
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Code int32 `json:"code"`
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Message string `json:"message"`
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Reason string `json:"reason,omitempty"`
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Data *EncryptedData `json:"data,omitempty"`
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}
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type EncryptedData struct {
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Ciphertext string `json:"ciphertext"`
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}
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// 回调通知结构
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type CallbackRequest struct {
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Appid string `json:"appid"`
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Timestamp string `json:"timestamp"`
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Sign string `json:"sign"`
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Data string `json:"data"`
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}
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```
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// File: ymt_v3/crypto.go
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```go
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package ymt_v3
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import (
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"bytes"
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"crypto"
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"crypto/aes"
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"crypto/rand"
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"crypto/rsa"
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"crypto/sha256"
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"crypto/x509"
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"encoding/base64"
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"encoding/json"
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"encoding/pem"
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"fmt"
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"io"
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"reflect"
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"sort"
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"strings"
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"time"
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)
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// ============================================================
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// 时间戳工具
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// ============================================================
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// GenerateTimestamp 生成格式为 yyyy-MM-dd HH:mm:ss 的时间戳
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func GenerateTimestamp() string {
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return time.Now().Format("2006-01-02 15:04:05")
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}
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// ============================================================
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// PKCS7 填充/去填充
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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, fmt.Errorf("数据为空")
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}
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padding := int(data[length-1])
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if padding > length || padding == 0 {
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return nil, fmt.Errorf("无效的填充")
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}
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for i := length - padding; i < length; i++ {
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if data[i] != byte(padding) {
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return nil, fmt.Errorf("无效的填充")
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}
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}
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return data[:length-padding], nil
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}
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// ============================================================
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// AES-ECB 加密/解密
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// ============================================================
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// AESECBEncrypt AES-ECB模式加密，返回base64编码
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func AESECBEncrypt(plaintext []byte, key []byte) (string, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return "", fmt.Errorf("创建AES cipher失败: %v", err)
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}
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padded := pkcs7Padding(plaintext, aes.BlockSize)
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ciphertext := make([]byte, len(padded))
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for i := 0; i < len(padded); i += aes.BlockSize {
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block.Encrypt(ciphertext[i:i+aes.BlockSize], padded[i:i+aes.BlockSize])
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}
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return base64.StdEncoding.EncodeToString(ciphertext), nil
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}
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// AESECBDecrypt AES-ECB模式解密，输入base64编码
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func AESECBDecrypt(encryptedData string, key []byte) ([]byte, error) {
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ciphertext, err := base64.StdEncoding.DecodeString(encryptedData)
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if err != nil {
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return nil, fmt.Errorf("base64解码失败: %v", err)
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}
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, fmt.Errorf("创建AES cipher失败: %v", err)
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}
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if len(ciphertext)%aes.BlockSize != 0 {
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return nil, fmt.Errorf("密文长度不是块大小的整数倍")
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}
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plaintext := make([]byte, len(ciphertext))
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for i := 0; i < len(ciphertext); i += aes.BlockSize {
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block.Decrypt(plaintext[i:i+aes.BlockSize], ciphertext[i:i+aes.BlockSize])
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}
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plaintext, err = pkcs7UnPadding(plaintext)
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if err != nil {
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return nil, fmt.Errorf("去除填充失败: %v", err)
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}
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return plaintext, nil
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}
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// ============================================================
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// SM4-CBC 加密/解密
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// ============================================================
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// SM4CBCEncrypt SM4-CBC模式加密，返回base64编码（IV前置）
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func SM4CBCEncrypt(plaintext []byte, key []byte) (string, error) {
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if len(key) != 16 {
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return "", fmt.Errorf("SM4密钥长度必须为16字节")
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}
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block, err := newSM4Cipher(key)
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if err != nil {
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return "", fmt.Errorf("创建SM4 cipher失败: %v", err)
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}
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padded := pkcs7Padding(plaintext, block.BlockSize())
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iv := make([]byte, block.BlockSize())
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if _, err := io.ReadFull(rand.Reader, iv); err != nil {
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return "", fmt.Errorf("生成IV失败: %v", err)
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}
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mode := newCBCEncrypter(block, iv)
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ciphertext := make([]byte, len(padded))
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mode.CryptBlocks(ciphertext, padded)
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result := append(iv, ciphertext...)
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return base64.StdEncoding.EncodeToString(result), nil
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}
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// SM4CBCDecrypt SM4-CBC模式解密，输入base64编码
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func SM4CBCDecrypt(encryptedData string, key []byte) ([]byte, error) {
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if len(key) != 16 {
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return nil, fmt.Errorf("SM4密钥长度必须为16字节")
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}
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data, err := base64.StdEncoding.DecodeString(encryptedData)
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if err != nil {
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return nil, fmt.Errorf("base64解码失败: %v", err)
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}
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block, err := newSM4Cipher(key)
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if err != nil {
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return nil, fmt.Errorf("创建SM4 cipher失败: %v", err)
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}
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blockSize := block.BlockSize()
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if len(data) < blockSize {
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return nil, fmt.Errorf("数据长度不足")
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}
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iv := data[:blockSize]
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ciphertext := data[blockSize:]
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mode := newCBCDecrypter(block, iv)
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plaintext := make([]byte, len(ciphertext))
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mode.CryptBlocks(plaintext, ciphertext)
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plaintext, err = pkcs7UnPadding(plaintext)
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if err != nil {
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return nil, fmt.Errorf("去除填充失败: %v", err)
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}
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return plaintext, nil
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}
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// ============================================================
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// SM4 纯Go实现（不依赖外部包）
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// ============================================================
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// sm4Cipher SM4密码结构
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type sm4Cipher struct {
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sk [32]uint32
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}
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// newSM4Cipher 创建SM4密码
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func newSM4Cipher(key []byte) (*sm4Cipher, error) {
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if len(key) != 16 {
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return nil, fmt.Errorf("SM4密钥长度必须为16字节")
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}
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c := &sm4Cipher{}
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c.sm4KeyInit(key)
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return c, nil
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}
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func (c *sm4Cipher) BlockSize() int { return 16 }
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func (c *sm4Cipher) Encrypt(dst, src []byte) {
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c.sm4OneRound(dst, src, c.sk)
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}
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func (c *sm4Cipher) Decrypt(dst, src []byte) {
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var rk [32]uint32
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for i := 0; i < 32; i++ {
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rk[i] = c.sk[31-i]
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}
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c.sm4OneRound(dst, src, rk)
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}
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// sm4CBCEncrypter CBC加密器
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type sm4CBCEncrypter struct {
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b *sm4Cipher
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iv []byte
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}
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func newCBCEncrypter(b *sm4Cipher, iv []byte) *sm4CBCEncrypter {
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return &sm4CBCEncrypter{b: b, iv: append([]byte{}, iv...)}
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}
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func (c *sm4CBCEncrypter) CryptBlocks(dst, src []byte) {
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blockSize := c.b.BlockSize()
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iv := make([]byte, blockSize)
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copy(iv, c.iv)
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for i := 0; i < len(src); i += blockSize {
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for j := 0; j < blockSize; j++ {
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dst[i+j] = src[i+j] ^ iv[j]
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}
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c.b.Encrypt(dst[i:i+blockSize], dst[i:i+blockSize])
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copy(iv, dst[i:i+blockSize])
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}
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}
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// sm4CBCDecrypter CBC解密器
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type sm4CBCDecrypter struct {
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b *sm4Cipher
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iv []byte
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}
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func newCBCDecrypter(b *sm4Cipher, iv []byte) *sm4CBCDecrypter {
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return &sm4CBCDecrypter{b: b, iv: append([]byte{}, iv...)}
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}
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func (c *sm4CBCDecrypter) CryptBlocks(dst, src []byte) {
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blockSize := c.b.BlockSize()
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iv := make([]byte, blockSize)
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copy(iv, c.iv)
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for i := 0; i < len(src); i += blockSize {
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c.b.Decrypt(dst[i:i+blockSize], src[i:i+blockSize])
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for j := 0; j < blockSize; j++ {
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dst[i+j] ^= iv[j]
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}
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copy(iv, src[i:i+blockSize])
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}
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}
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// SM4 S盒
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var sm4Sbox = [256]byte{
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0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
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0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
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0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
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0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
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0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
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0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
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0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
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0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
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0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
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0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
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0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
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0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
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0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
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0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
|
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0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
|
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0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48,
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}
|
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|
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// SM4 FK常量
|
||
var sm4FK = [4]uint32{0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc}
|
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|
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// SM4 CK常量
|
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var sm4CK = [32]uint32{
|
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0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
|
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0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
|
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0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
|
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0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
|
||
0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
|
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0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
|
||
0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
|
||
0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279,
|
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}
|
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|
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func (c *sm4Cipher) sm4KeyInit(key []byte) {
|
||
var mk [4]uint32
|
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for i := 0; i < 4; i++ {
|
||
mk[i] = uint32(key[4*i])<<24 | uint32(key[4*i+1])<<16 | uint32(key[4*i+2])<<8 | uint32(key[4*i+3])
|
||
}
|
||
|
||
var k [36]uint32
|
||
for i := 0; i < 4; i++ {
|
||
k[i] = mk[i] ^ sm4FK[i]
|
||
}
|
||
|
||
for i := 0; i < 32; i++ {
|
||
k[i+4] = k[i] ^ sm4L1(k[i+1]^k[i+2]^k[i+3]^sm4CK[i])
|
||
c.sk[i] = k[i+4]
|
||
}
|
||
}
|
||
|
||
func (c *sm4Cipher) sm4OneRound(dst, src []byte, sk [32]uint32) {
|
||
var x [36]uint32
|
||
for i := 0; i < 4; i++ {
|
||
x[i] = uint32(src[4*i])<<24 | uint32(src[4*i+1])<<16 | uint32(src[4*i+2])<<8 | uint32(src[4*i+3])
|
||
}
|
||
|
||
for i := 0; i < 32; i++ {
|
||
x[i+4] = x[i] ^ sm4L2(x[i+1]^x[i+2]^x[i+3]^sk[i])
|
||
}
|
||
|
||
for i := 0; i < 4; i++ {
|
||
dst[4*i] = byte(x[35-i] >> 24)
|
||
dst[4*i+1] = byte(x[35-i] >> 16)
|
||
dst[4*i+2] = byte(x[35-i] >> 8)
|
||
dst[4*i+3] = byte(x[35-i])
|
||
}
|
||
}
|
||
|
||
func sm4L1(b uint32) uint32 {
|
||
return b ^ sm4Rotl(b, 2) ^ sm4Rotl(b, 10) ^ sm4Rotl(b, 18) ^ sm4Rotl(b, 24)
|
||
}
|
||
|
||
func sm4L2(b uint32) uint32 {
|
||
return b ^ sm4Rotl(b, 13) ^ sm4Rotl(b, 23)
|
||
}
|
||
|
||
func sm4Rotl(x uint32, n uint32) uint32 {
|
||
return (x << n) | (x >> (32 - n))
|
||
}
|
||
|
||
func sm4Tau(a uint32) uint32 {
|
||
var b [4]byte
|
||
b[0] = sm4Sbox[byte(a>>24)]
|
||
b[1] = sm4Sbox[byte(a>>16)]
|
||
b[2] = sm4Sbox[byte(a>>8)]
|
||
b[3] = sm4Sbox[byte(a)]
|
||
return uint32(b[0])<<24 | uint32(b[1])<<16 | uint32(b[2])<<8 | uint32(b[3])
|
||
}
|
||
|
||
// ============================================================
|
||
// RSA 签名
|
||
// ============================================================
|
||
|
||
// SignWithRSA 使用RSA私钥对字符串进行签名，返回base64编码
|
||
func SignWithRSA(signStr string, privateKeyPEM string) (string, error) {
|
||
block, _ := pem.Decode([]byte(privateKeyPEM))
|
||
if block == nil {
|
||
return "", fmt.Errorf("解析PEM私钥失败")
|
||
}
|
||
|
||
privateKey, err := x509.ParsePKCS8PrivateKey(block.Bytes)
|
||
if err != nil {
|
||
privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
|
||
if err != nil {
|
||
return "", fmt.Errorf("解析私钥失败: %v", err)
|
||
}
|
||
}
|
||
|
||
rsaPrivateKey, ok := privateKey.(*rsa.PrivateKey)
|
||
if !ok {
|
||
return "", fmt.Errorf("不是RSA私钥")
|
||
}
|
||
|
||
h := sha256.New()
|
||
h.Write([]byte(signStr))
|
||
hashed := h.Sum(nil)
|
||
|
||
signature, err := rsa.SignPKCS1v15(rand.Reader, rsaPrivateKey, crypto.SHA256, hashed)
|
||
if err != nil {
|
||
return "", fmt.Errorf("签名失败: %v", err)
|
||
}
|
||
|
||
return base64.StdEncoding.EncodeToString(signature), nil
|
||
}
|
||
|
||
// VerifyWithRSA 使用RSA公钥验证签名
|
||
func VerifyWithRSA(signStr string, sign string, publicKeyPEM string) error {
|
||
block, _ := pem.Decode([]byte(publicKeyPEM))
|
||
if block == nil {
|
||
return fmt.Errorf("解析PEM公钥失败")
|
||
}
|
||
|
||
publicKey, err := x509.ParsePKIXPublicKey(block.Bytes)
|
||
if err != nil {
|
||
publicKey, err = x509.ParsePKCS1PublicKey(block.Bytes)
|
||
if err != nil {
|
||
return fmt.Errorf("解析公钥失败: %v", err)
|
||
}
|
||
}
|
||
|
||
rsaPublicKey, ok := publicKey.(*rsa.PublicKey)
|
||
if !ok {
|
||
return fmt.Errorf("不是RSA公钥")
|
||
}
|
||
|
||
signBytes, err := base64.StdEncoding.DecodeString(sign)
|
||
if err != nil {
|
||
return fmt.Errorf("base64解码签名失败: %v", err)
|
||
}
|
||
|
||
h := sha256.New()
|
||
h.Write([]byte(signStr))
|
||
hashed := h.Sum(nil)
|
||
|
||
return rsa.VerifyPKCS1v15(rsaPublicKey, crypto.SHA256, hashed, signBytes)
|
||
}
|
||
|
||
// ============================================================
|
||
// 业务参数处理
|
||
// ============================================================
|
||
|
||
// EncryptBizParams 加密业务参数
|
||
// 将业务参数去掉零值，按字母排序，转JSON，然后用指定算法加密
|
||
func EncryptBizParams(params interface{}, key []byte, encryptType string) (string, error) {
|
||
// 将结构体转为map，去掉零值
|
||
m, err := structToMap(params)
|
||
if err != nil {
|
||
return "", fmt.Errorf("转换参数失败: %v", err)
|
||
}
|
||
|
||
// 按key排序
|
||
keys := make([]string, 0, len(m))
|
||
for k := range m {
|
||
keys = append(keys, k)
|
||
}
|
||
sort.Strings(keys)
|
||
|
||
// 构建有序map
|
||
orderedMap := make(map[string]interface{})
|
||
for _, k := range keys {
|
||
orderedMap[k] = m[k]
|
||
}
|
||
|
||
// 转JSON
|
||
plaintext, err := json.Marshal(orderedMap)
|
||
if err != nil {
|
||
return "", fmt.Errorf("JSON序列化失败: %v", err)
|
||
}
|
||
|
||
// 加密
|
||
switch encryptType {
|
||
case "aes":
|
||
return AESECBEncrypt(plaintext, key)
|
||
case "sm4":
|
||
return SM4CBCEncrypt(plaintext, key)
|
||
default:
|
||
return "", fmt.Errorf("不支持的加密类型: %s", encryptType)
|
||
}
|
||
}
|
||
|
||
// DecryptBizParams 解密业务参数
|
||
func DecryptBizParams(ciphertext string, key []byte, encryptType string) ([]byte, error) {
|
||
switch encryptType {
|
||
case "aes":
|
||
return AESECBDecrypt(ciphertext, key)
|
||
case "sm4":
|
||
return SM4CBCDecrypt(ciphertext, key)
|
||
default:
|
||
return nil, fmt.Errorf("不支持的加密类型: %s", encryptType)
|
||
}
|
||
}
|
||
|
||
// structToMap 将结构体转为map，去掉零值
|
||
func structToMap(obj interface{}) (map[string]interface{}, error) {
|
||
result := make(map[string]interface{})
|
||
|
||
v := reflect.ValueOf(obj)
|
||
if v.Kind() == reflect.Ptr {
|
||
v = v.Elem()
|
||
}
|
||
if v.Kind() != reflect.Struct {
|
||
return nil, fmt.Errorf("不是结构体")
|
||
}
|
||
|
||
t := v.Type()
|
||
for i := 0; i < t.NumField(); i++ {
|
||
field := t.Field(i)
|
||
value := v.Field(i)
|
||
|
||
// 获取json tag
|
||
jsonTag := field.Tag.Get("json")
|
||
if jsonTag == "" || jsonTag == "-" {
|
||
continue
|
||
}
|
||
name := strings.Split(jsonTag, ",")[0]
|
||
|
||
// 检查omitempty
|
||
opts := strings.Split(jsonTag, ",")
|
||
omitempty := false
|
||
for _, opt := range opts[1:] {
|
||
if opt == "omitempty" {
|
||
omitempty = true
|
||
break
|
||
}
|
||
}
|
||
|
||
// 获取实际值
|
||
var val interface{}
|
||
switch value.Kind() {
|
||
case reflect.String:
|
||
val = value.String()
|
||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||
val = value.Int()
|
||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
||
val = value.Uint()
|
||
case reflect.Float32, reflect.Float64:
|
||
val = value.Float()
|
||
case reflect.Bool:
|
||
val = value.Bool()
|
||
case reflect.Slice, reflect.Map:
|
||
if value.IsNil() {
|
||
if omitempty {
|
||
continue
|
||
}
|
||
val = value.Interface()
|
||
} else {
|
||
val = value.Interface()
|
||
}
|
||
case reflect.Ptr, reflect.Interface:
|
||
if value.IsNil() {
|
||
if omitempty {
|
||
continue
|
||
}
|
||
val = nil
|
||
} else {
|
||
val = value.Elem().Interface()
|
||
}
|
||
default:
|
||
val = value.Interface()
|
||
}
|
||
|
||
// 检查零值
|
||
if omitempty && isZeroValue(val) {
|
||
continue
|
||
}
|
||
|
||
result[name] = val
|
||
}
|
||
|
||
return result, nil
|
||
}
|
||
|
||
// isZeroValue 判断值是否为零值
|
||
func isZeroValue(v interface{}) bool {
|
||
if v == nil {
|
||
return true
|
||
}
|
||
rv := reflect.ValueOf(v)
|
||
switch rv.Kind() {
|
||
case reflect.String:
|
||
return rv.String() == ""
|
||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||
return rv.Int() == 0
|
||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
||
return rv.Uint() == 0
|
||
case reflect.Float32, reflect.Float64:
|
||
return rv.Float() == 0
|
||
case reflect.Bool:
|
||
return !rv.Bool()
|
||
default:
|
||
return false
|
||
}
|
||
}
|
||
```
|
||
|
||
// File: ymt_v3/client.go
|
||
```go
|
||
package ymt_v3
|
||
|
||
import (
|
||
"bytes"
|
||
"context"
|
||
"encoding/json"
|
||
"fmt"
|
||
"io"
|
||
"net/http"
|
||
"strings"
|
||
)
|
||
|
||
// Config 客户端配置
|
||
type Config struct {
|
||
AppID string // 应用ID
|
||
PrivateKey string // 应用私钥（PEM格式），用于请求签名
|
||
PublicKey string // 平台公钥（PEM格式），用于响应验签
|
||
Key string // 业务参数加密密钥
|
||
EncryptType string // 加密类型：aes 或 sm4
|
||
BaseURL string // 接口地址
|
||
HTTPClient *http.Client
|
||
}
|
||
|
||
// Client SDK客户端
|
||
type Client struct {
|
||
config *Config
|
||
client *http.Client
|
||
}
|
||
|
||
// NewClient 创建新的SDK客户端
|
||
func NewClient(config *Config) *Client {
|
||
if config.HTTPClient == nil {
|
||
config.HTTPClient = http.DefaultClient
|
||
}
|
||
return &Client{
|
||
config: config,
|
||
client: config.HTTPClient,
|
||
}
|
||
}
|
||
|
||
// doRequest 发送请求并处理响应
|
||
func (c *Client) doRequest(ctx context.Context, path string, bizParams interface{}, result interface{}) error {
|
||
// 1. 加密业务参数
|
||
ciphertext, err := EncryptBizParams(bizParams, []byte(c.config.Key), c.config.EncryptType)
|
||
if err != nil {
|
||
return fmt.Errorf("加密业务参数失败: %v", err)
|
||
}
|
||
|
||
// 2. 生成时间戳
|
||
timestamp := GenerateTimestamp()
|
||
|
||
// 3. 拼接签名字符串：app_id + timestamp + ciphertext
|
||
signStr := c.config.AppID + timestamp + ciphertext
|
||
|
||
// 4. 使用应用私钥签名
|
||
sign, err := SignWithRSA(signStr, c.config.PrivateKey)
|
||
if err != nil {
|
||
return fmt.Errorf("签名失败: %v", err)
|
||
}
|
||
|
||
// 5. 构建请求体
|
||
reqBody := EncryptedRequest{
|
||
Ciphertext: ciphertext,
|
||
}
|
||
bodyBytes, err := json.Marshal(reqBody)
|
||
if err != nil {
|
||
return fmt.Errorf("序列化请求体失败: %v", err)
|
||
}
|
||
|
||
// 6. 创建HTTP请求
|
||
url := strings.TrimRight(c.config.BaseURL, "/") + path
|
||
req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewReader(bodyBytes))
|
||
if err != nil {
|
||
return fmt.Errorf("创建请求失败: %v", err)
|
||
}
|
||
|
||
// 7. 设置Header
|
||
req.Header.Set("Content-Type", "application/json")
|
||
req.Header.Set("Appid", c.config.AppID)
|
||
req.Header.Set("Timestamp", timestamp)
|
||
req.Header.Set("Sign", sign)
|
||
|
||
// 8. 发送请求
|
||
resp, err := c.client.Do(req)
|
||
if err != nil {
|
||
return fmt.Errorf("发送请求失败: %v", err)
|
||
}
|
||
defer resp.Body.Close()
|
||
|
||
respBody, err := io.ReadAll(resp.Body)
|
||
if err != nil {
|
||
return fmt.Errorf("读取响应失败: %v", err)
|
||
}
|
||
|
||
// 9. 解析响应
|
||
var encryptedResp EncryptedResponse
|
||
if err := json.Unmarshal(respBody, &encryptedResp); err != nil {
|
||
return fmt.Errorf("解析响应失败: %v", err)
|
||
}
|
||
|
||
// 10. 检查错误码
|
||
if encryptedResp.Code != 200 {
|
||
return &APIError{
|
||
Code: encryptedResp.Code,
|
||
Message: encryptedResp.Message,
|
||
Reason: encryptedResp.Reason,
|
||
}
|
||
}
|
||
|
||
// 11. 解密响应数据
|
||
if encryptedResp.Data == nil || encryptedResp.Data.Ciphertext == "" {
|
||
return fmt.Errorf("响应数据为空")
|
||
}
|
||
|
||
plaintext, err := DecryptBizParams(encryptedResp.Data.Ciphertext, []byte(c.config.Key), c.config.EncryptType)
|
||
if err != nil {
|
||
return fmt.Errorf("解密响应数据失败: %v", err)
|
||
}
|
||
|
||
// 12. 解析解密后的数据到结果结构体
|
||
if err := json.Unmarshal(plaintext, result); err != nil {
|
||
return fmt.Errorf("解析解密数据失败: %v", err)
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// ============================================================
|
||
// API 方法
|
||
// ============================================================
|
||
|
||
// Order 获取券码
|
||
func (c *Client) Order(ctx context.Context, req *OrderRequest) (*OrderResponse, error) {
|
||
result := &OrderResponse{}
|
||
if err := c.doRequest(ctx, "/openapi/v1/key/order", req, result); err != nil {
|
||
return nil, err
|
||
}
|
||
return result, nil
|
||
}
|
||
|
||
// Query 券码查询
|
||
func (c *Client) Query(ctx context.Context, req *QueryRequest) (*OrderResponse, error) {
|
||
result := &OrderResponse{}
|
||
if err := c.doRequest(ctx, "/openapi/v1/key/query", req, result); err != nil {
|
||
return nil, err
|
||
}
|
||
return result, nil
|
||
}
|
||
|
||
// Discard 券码作废
|
||
func (c *Client) Discard(ctx context.Context, req *DiscardRequest) (*DiscardResponse, error) {
|
||
result := &DiscardResponse{}
|
||
if err := c.doRequest(ctx, "/openapi/v1/key/discard", req, result); err != nil {
|
||
return nil, err
|
||
}
|
||
return result, nil
|
||
}
|
||
|
||
// BatchOrder 批量发卡
|
||
func (c *Client) BatchOrder(ctx context.Context, req *BatchOrderRequest) (*BatchOrderResponse, error) {
|
||
result := &BatchOrderResponse{}
|
||
if err := c.doRequest(ctx, "/openapi/v1/key/batch_order", req, result); err != nil {
|
||
return nil, err
|
||
}
|
||
return result, nil
|
||
}
|
||
|
||
// BatchQuery 批量查询
|
||
func (c *Client) BatchQuery(ctx context.Context, req *BatchQueryRequest) (*BatchQueryResponse, error) {
|
||
result := &BatchQueryResponse{}
|
||
if err := c.doRequest(ctx, "/openapi/v1/key/batch_query", req, result); err != nil {
|
||
return nil, err
|
||
}
|
||
return result, nil
|
||
}
|
||
|
||
// ============================================================
|
||
// 回调验签
|
||
// ============================================================
|
||
|
||
// VerifyCallback 验证回调通知的签名
|
||
// 参数：
|
||
// - appID: 应用ID
|
||
// - timestamp: 回调请求中的时间戳
|
||
// - sign: 回调请求中的签名
|
||
// - data: 回调请求中的业务数据（明文JSON字符串）
|
||
// - publicKeyPEM: 平台公钥（PEM格式）
|
||
// - key: 业务参数加密密钥
|
||
// - encryptType: 加密类型：aes 或 sm4
|
||
func VerifyCallback(appID, timestamp, sign, data, publicKeyPEM string, key []byte, encryptType string) error {
|
||
// 1. 使用key将data加密得到ciphertext
|
||
ciphertext, err := EncryptBizParamsFromJSON(data, key, encryptType)
|
||
if err != nil {
|
||
return fmt.Errorf("加密回调数据失败: %v", err)
|
||
}
|
||
|
||
// 2. 拼接签名字符串：app_id + timestamp + ciphertext
|
||
signStr := appID + timestamp + ciphertext
|
||
|
||
// 3. 使用平台公钥验签
|
||
return VerifyWithRSA(signStr, sign, publicKeyPEM)
|
||
}
|
||
|
||
// EncryptBizParamsFromJSON 将JSON字符串按规则加密
|
||
func EncryptBizParamsFromJSON(jsonStr string, key []byte, encryptType string) (string, error) {
|
||
// 解析JSON
|
||
var data map[string]interface{}
|
||
if err := json.Unmarshal([]byte(jsonStr), &data); err != nil {
|
||
return "", fmt.Errorf("解析JSON失败: %v", err)
|
||
}
|
||
|
||
// 去掉零值
|
||
cleaned := make(map[string]interface{})
|
||
for k, v := range data {
|
||
if !isZeroValue(v) {
|
||
cleaned[k] = v
|
||
}
|
||
}
|
||
|
||
// 按key排序
|
||
keys := make([]string, 0, len(cleaned))
|
||
for k := range cleaned {
|
||
keys = append(keys, k)
|
||
}
|
||
sort.Strings(keys)
|
||
|
||
// 构建有序map
|
||
orderedMap := make(map[string]interface{})
|
||
for _, k := range keys {
|
||
orderedMap[k] = cleaned[k]
|
||
}
|
||
|
||
// 转JSON
|
||
plaintext, err := json.Marshal(orderedMap)
|
||
if err != nil {
|
||
return "", fmt.Errorf("JSON序列化失败: %v", err)
|
||
}
|
||
|
||
// 加密
|
||
switch encryptType {
|
||
case "aes":
|
||
return AESECBEncrypt(plaintext, key)
|
||
case "sm4":
|
||
return SM4CBCEncrypt(plaintext, key)
|
||
default:
|
||
return "", fmt.Errorf("不支持的加密类型: %s", encryptType)
|
||
}
|
||
}
|
||
```
|
||
|
||
// File: ymt_v3/example_test.go
|
||
```go
|
||
package ymt_v3
|
||
|
||
import (
|
||
"context"
|
||
"fmt"
|
||
"testing"
|
||
)
|
||
|
||
// 测试参数（请替换为实际值）
|
||
const (
|
||
testAppID = "xxx"
|
||
testPrivateKey = `-----BEGIN PRIVATE KEY-----
|
||
xxx
|
||
-----END PRIVATE KEY-----`
|
||
testPublicKey = `-----BEGIN PUBLIC KEY-----
|
||
xxx
|
||
-----END PUBLIC KEY-----`
|
||
testKey = "xxxx"
|
||
testEncryptType = "aes"
|
||
testBaseURL = "https://gateway.dev.cdlsxd.cn"
|
||
testActivityNo = "xxxx"
|
||
)
|
||
|
||
func TestClient_Order(t *testing.T) {
|
||
client := NewClient(&Config{
|
||
AppID: testAppID,
|
||
PrivateKey: testPrivateKey,
|
||
PublicKey: testPublicKey,
|
||
Key: testKey,
|
||
EncryptType: testEncryptType,
|
||
BaseURL: testBaseURL,
|
||
})
|
||
|
||
resp, err := client.Order(context.Background(), &OrderRequest{
|
||
OutBizNo: "order_001",
|
||
ActivityNo: testActivityNo,
|
||
Account: "18666666666",
|
||
NotifyURL: "https://notify.example.com/openapi",
|
||
})
|
||
if err != nil {
|
||
t.Fatalf("Order failed: %v", err)
|
||
}
|
||
fmt.Printf("Order response: %+v\n", resp)
|
||
}
|
||
|
||
func TestClient_Query(t *testing.T) {
|
||
client := NewClient(&Config{
|
||
AppID: testAppID,
|
||
PrivateKey: testPrivateKey,
|
||
PublicKey: testPublicKey,
|
||
Key: testKey,
|
||
EncryptType: testEncryptType,
|
||
BaseURL: testBaseURL,
|
||
})
|
||
|
||
resp, err := client.Query(context.Background(), &QueryRequest{
|
||
OutBizNo: "order_001",
|
||
})
|
||
if err != nil {
|
||
t.Fatalf("Query failed: %v", err)
|
||
}
|
||
fmt.Printf("Query response: %+v\n", resp)
|
||
}
|
||
|
||
func TestClient_Discard(t *testing.T) {
|
||
client := NewClient(&Config{
|
||
AppID: testAppID,
|
||
PrivateKey: testPrivateKey,
|
||
PublicKey: testPublicKey,
|
||
Key: testKey,
|
||
EncryptType: testEncryptType,
|
||
BaseURL: testBaseURL,
|
||
})
|
||
|
||
resp, err := client.Discard(context.Background(), &DiscardRequest{
|
||
TradeNo: "7251449503000383488",
|
||
})
|
||
if err != nil {
|
||
t.Fatalf("Discard failed: %v", err)
|
||
}
|
||
fmt.Printf("Discard response: %+v\n", resp)
|
||
}
|
||
|
||
func TestClient_BatchOrder(t *testing.T) {
|
||
client := NewClient(&Config{
|
||
AppID: testAppID,
|
||
PrivateKey: testPrivateKey,
|
||
PublicKey: testPublicKey,
|
||
Key: testKey,
|
||
EncryptType: testEncryptType,
|
||
BaseURL: testBaseURL,
|
||
})
|
||
|
||
resp, err := client.BatchOrder(context.Background(), &BatchOrderRequest{
|
||
OutBizNo: "batch_001",
|
||
ActivityNo: testActivityNo,
|
||
Number: 10,
|
||
NotifyURL: "https://notify.example.com/openapi",
|
||
})
|
||
if err != nil {
|
||
t.Fatalf("BatchOrder failed: %v", err)
|
||
}
|
||
fmt.Printf("BatchOrder response: %+v\n", resp)
|
||
}
|
||
|
||
func TestClient_BatchQuery(t *testing.T) {
|
||
client := NewClient(&Config{
|
||
AppID: testAppID,
|
||
PrivateKey: testPrivateKey,
|
||
PublicKey: testPublicKey,
|
||
Key: testKey,
|
||
EncryptType: testEncryptType,
|
||
BaseURL: testBaseURL,
|
||
})
|
||
|
||
resp, err := client.BatchQuery(context.Background(), &BatchQueryRequest{
|
||
TradeNo: "7251449503000383499",
|
||
})
|
||
if err != nil {
|
||
t.Fatalf("BatchQuery failed: %v", err)
|
||
}
|
||
fmt.Printf("BatchQuery response: %+v\n", resp)
|
||
}
|
||
|
||
func TestVerifyCallback(t *testing.T) {
|
||
// 模拟回调参数
|
||
appID := "123456"
|
||
timestamp := "2026-06-22 15:30:00"
|
||
sign := "base64_encoded_signature"
|
||
data := `{"out_biz_no":"batch_001","trade_no":"7251449503000383499","status":"success","download_url":"https://oss.example.com/openapi_7251449503000383499.zip","zip_password":"123456"}`
|
||
|
||
err := VerifyCallback(appID, timestamp, sign, data, testPublicKey, []byte(testKey), testEncryptType)
|
||
if err != nil {
|
||
t.Logf("VerifyCallback result: %v (expected if sign is invalid)", err)
|
||
} else {
|
||
t.Log("VerifyCallback success")
|
||
}
|
||
}
|
||
```
|
||
|
||
现在让我重新整理一下，确保所有文件都正确输出。
|
||
|
||
实际上，让我重新检查一下文档中的签名规则：
|
||
|
||
> 1. 拼接签名字符串：分配给开发者的应用ID + 发送请求的时间 + 加密业务参数
|
||
> 2. 使用应用私钥将拼接待签名字符串生成签名字符串
|
||
|
||
所以签名串是：app_id + timestamp + ciphertext（直接拼接，没有分隔符）
|
||
|
||
回调验签规则：
|
||
> 1. 获取header头里面的签名信息
|
||
> 2. 获取body里面的业务参数data
|
||
> 3. 将业务参数data去掉"零"值的参数，再由小到大按照字母排序，转成json字符串得到plaintext
|
||
> 4. 使用应用key将plaintext字符串加密[aes/sm4]得到加密得到ciphertext
|
||
> 5. 拼接签名字符串：分配给开发者的应用ID + 发送请求的时间 + ciphertext
|
||
> 6. 使用应用公钥验签
|
||
|
||
好的，我的实现已经覆盖了这些规则。
|
||
|
||
现在让我输出所有文件。</think>现在我来生成完整的 SDK 代码，包含所有 6 个文件。
|
||
|
||
// File: ymt_v3/go.mod
|
||
```go
|
||
module ymt_v3
|
||
|
||
go 1.21
|
||
```
|
||
|
||
// File: ymt_v3/errors.go
|
||
```go
|
||
package ymt_v3
|
||
|
||
import "fmt"
|
||
|
||
// APIError 表示API返回的错误信息
|
||
type APIError struct {
|
||
Code int32 `json:"code"`
|
||
Message string `json:"message"`
|
||
Reason string `json:"reason,omitempty"`
|
||
}
|
||
|
||
func (e *APIError) Error() string {
|
||
if e.Reason != "" {
|
||
return fmt.Sprintf("code=%d, message=%s, reason=%s", e.Code, e.Message, e.Reason)
|
||
}
|
||
return fmt.Sprintf("code=%d, message=%s", e.Code, e.Message)
|
||
}
|
||
```
|
||
|
||
// File: ymt_v3/types.go
|
||
```go
|
||
package ymt_v3
|
||
|
||
// OrderRequest 获取券码请求（业务明文参数）
|
||
type OrderRequest struct {
|
||
OutBizNo string `json:"out_biz_no"`
|
||
ActivityNo string `json:"activity_no"`
|
||
Account string `json:"account,omitempty"`
|
||
NotifyURL string `json:"notify_url,omitempty"`
|
||
}
|
||
|
||
// OrderResponse 获取券码/券码查询响应（解密后）
|
||
type OrderResponse struct {
|
||
OutBizNo string `json:"out_biz_no"`
|
||
TradeNo string `json:"trade_no"`
|
||
Key string `json:"key,omitempty"`
|
||
URL string `json:"url,omitempty"`
|
||
ValidBeginTime string `json:"valid_begin_time,omitempty"`
|
||
ValidEndTime string `json:"valid_end_time,omitempty"`
|
||
UsableNum uint32 `json:"usable_num"`
|
||
UsageNum uint32 `json:"usage_num"`
|
||
Status uint32 `json:"status"`
|
||
SettlementPrice float64 `json:"settlement_price,omitempty"`
|
||
Account string `json:"account,omitempty"`
|
||
}
|
||
|
||
// QueryRequest 券码查询请求（业务明文参数）
|
||
type QueryRequest struct {
|
||
OutBizNo string `json:"out_biz_no,omitempty"`
|
||
TradeNo string `json:"trade_no,omitempty"`
|
||
}
|
||
|
||
// DiscardRequest 券码作废请求（业务明文参数）
|
||
type DiscardRequest struct {
|
||
OutBizNo string `json:"out_biz_no,omitempty"`
|
||
TradeNo string `json:"trade_no,omitempty"`
|
||
}
|
||
|
||
// DiscardResponse 券码作废响应（解密后）
|
||
type DiscardResponse struct {
|
||
OutBizNo string `json:"out_biz_no"`
|
||
TradeNo string `json:"trade_no"`
|
||
Status uint32 `json:"status"`
|
||
}
|
||
|
||
// BatchOrderRequest 批量发卡请求（业务明文参数）
|
||
type BatchOrderRequest struct {
|
||
OutBizNo string `json:"out_biz_no"`
|
||
ActivityNo string `json:"activity_no"`
|
||
Number int32 `json:"number"`
|
||
NotifyURL string `json:"notify_url,omitempty"`
|
||
}
|
||
|
||
// BatchOrderResponse 批量发卡响应（解密后）
|
||
type BatchOrderResponse struct {
|
||
OutBizNo string `json:"out_biz_no"`
|
||
TradeNo string `json:"trade_no"`
|
||
Status string `json:"status"`
|
||
}
|
||
|
||
// BatchQueryRequest 批量查询请求（业务明文参数）
|
||
type BatchQueryRequest struct {
|
||
OutBizNo string `json:"out_biz_no,omitempty"`
|
||
TradeNo string `json:"trade_no,omitempty"`
|
||
}
|
||
|
||
// BatchQueryResponse 批量查询响应（解密后）
|
||
type BatchQueryResponse struct {
|
||
OutBizNo string `json:"out_biz_no"`
|
||
TradeNo string `json:"trade_no"`
|
||
Status string `json:"status"`
|
||
DownloadURL string `json:"download_url,omitempty"`
|
||
ZipPassword string `json:"zip_password,omitempty"`
|
||
}
|
||
|
||
// EncryptedRequest 公共加密请求体
|
||
type EncryptedRequest struct {
|
||
Ciphertext string `json:"ciphertext"`
|
||
}
|
||
|
||
// EncryptedResponse 公共加密响应体
|
||
type EncryptedResponse struct {
|
||
Code int32 `json:"code"`
|
||
Message string `json:"message"`
|
||
Reason string `json:"reason,omitempty"`
|
||
Data *EncryptedData `json:"data,omitempty"`
|
||
}
|
||
|
||
// EncryptedData 加密数据包装
|
||
type EncryptedData struct {
|
||
Ciphertext string `json:"ciphertext"`
|
||
}
|
||
```
|
||
|
||
// File: ymt_v3/crypto.go
|
||
```go
|
||
package ymt_v3
|
||
|
||
import (
|
||
"bytes"
|
||
"crypto"
|
||
"crypto/aes"
|
||
"crypto/rand"
|
||
"crypto/rsa"
|
||
"crypto/sha256"
|
||
"crypto/x509"
|
||
"encoding/base64"
|
||
"encoding/json"
|
||
"encoding/pem"
|
||
"fmt"
|
||
"io"
|
||
"reflect"
|
||
"sort"
|
||
"strings"
|
||
"time"
|
||
)
|
||
|
||
// ============================================================
|
||
// 时间戳工具
|
||
// ============================================================
|
||
|
||
// GenerateTimestamp 生成格式为 yyyy-MM-dd HH:mm:ss 的时间戳
|
||
func GenerateTimestamp() string {
|
||
return time.Now().Format("2006-01-02 15:04:05")
|
||
}
|
||
|
||
// ============================================================
|
||
// PKCS7 填充/去填充
|
||
// ============================================================
|
||
|
||
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, fmt.Errorf("数据为空")
|
||
}
|
||
padding := int(data[length-1])
|
||
if padding > length || padding == 0 {
|
||
return nil, fmt.Errorf("无效的填充")
|
||
}
|
||
for i := length - padding; i < length; i++ {
|
||
if data[i] != byte(padding) {
|
||
return nil, fmt.Errorf("无效的填充")
|
||
}
|
||
}
|
||
return data[:length-padding], nil
|
||
}
|
||
|
||
// ============================================================
|
||
// AES-ECB 加密/解密
|
||
// ============================================================
|
||
|
||
// AESECBEncrypt AES-ECB模式加密，返回base64编码
|
||
func AESECBEncrypt(plaintext []byte, key []byte) (string, error) {
|
||
block, err := aes.NewCipher(key)
|
||
if err != nil {
|
||
return "", fmt.Errorf("创建AES cipher失败: %v", err)
|
||
}
|
||
|
||
padded := pkcs7Padding(plaintext, aes.BlockSize)
|
||
|
||
ciphertext := make([]byte, len(padded))
|
||
for i := 0; i < len(padded); i += aes.BlockSize {
|
||
block.Encrypt(ciphertext[i:i+aes.BlockSize], padded[i:i+aes.BlockSize])
|
||
}
|
||
|
||
return base64.StdEncoding.EncodeToString(ciphertext), nil
|
||
}
|
||
|
||
// AESECBDecrypt AES-ECB模式解密，输入base64编码
|
||
func AESECBDecrypt(encryptedData string, key []byte) ([]byte, error) {
|
||
ciphertext, err := base64.StdEncoding.DecodeString(encryptedData)
|
||
if err != nil {
|
||
return nil, fmt.Errorf("base64解码失败: %v", err)
|
||
}
|
||
|
||
block, err := aes.NewCipher(key)
|
||
if err != nil {
|
||
return nil, fmt.Errorf("创建AES cipher失败: %v", err)
|
||
}
|
||
|
||
if len(ciphertext)%aes.BlockSize != 0 {
|
||
return nil, fmt.Errorf("密文长度不是块大小的整数倍")
|
||
}
|
||
|
||
plaintext := make([]byte, len(ciphertext))
|
||
for i := 0; i < len(ciphertext); i += aes.BlockSize {
|
||
block.Decrypt(plaintext[i:i+aes.BlockSize], ciphertext[i:i+aes.BlockSize])
|
||
}
|
||
|
||
plaintext, err = pkcs7UnPadding(plaintext)
|
||
if err != nil {
|
||
return nil, fmt.Errorf("去除填充失败: %v", err)
|
||
}
|
||
|
||
return plaintext, nil
|
||
}
|
||
|
||
// ============================================================
|
||
// SM4-CBC 加密/解密（纯Go实现，无外部依赖）
|
||
// ============================================================
|
||
|
||
// SM4CBCEncrypt SM4-CBC模式加密，返回base64编码（IV前置）
|
||
func SM4CBCEncrypt(plaintext []byte, key []byte) (string, error) {
|
||
if len(key) != 16 {
|
||
return "", fmt.Errorf("SM4密钥长度必须为16字节")
|
||
}
|
||
|
||
block, err := newSM4Cipher(key)
|
||
if err != nil {
|
||
return "", fmt.Errorf("创建SM4 cipher失败: %v", err)
|
||
}
|
||
|
||
padded := pkcs7Padding(plaintext, block.BlockSize())
|
||
|
||
iv := make([]byte, block.BlockSize())
|
||
if _, err := io.ReadFull(rand.Reader, iv); err != nil {
|
||
return "", fmt.Errorf("生成IV失败: %v", err)
|
||
}
|
||
|
||
mode := newCBCEncrypter(block, iv)
|
||
ciphertext := make([]byte, len(padded))
|
||
mode.CryptBlocks(ciphertext, padded)
|
||
|
||
result := append(iv, ciphertext...)
|
||
return base64.StdEncoding.EncodeToString(result), nil
|
||
}
|
||
|
||
// SM4CBCDecrypt SM4-CBC模式解密，输入base64编码
|
||
func SM4CBCDecrypt(encryptedData string, key []byte) ([]byte, error) {
|
||
if len(key) != 16 {
|
||
return nil, fmt.Errorf("SM4密钥长度必须为16字节")
|
||
}
|
||
|
||
data, err := base64.StdEncoding.DecodeString(encryptedData)
|
||
if err != nil {
|
||
return nil, fmt.Errorf("base64解码失败: %v", err)
|
||
}
|
||
|
||
block, err := newSM4Cipher(key)
|
||
if err != nil {
|
||
return nil, fmt.Errorf("创建SM4 cipher失败: %v", err)
|
||
}
|
||
|
||
blockSize := block.BlockSize()
|
||
if len(data) < blockSize {
|
||
return nil, fmt.Errorf("数据长度不足")
|
||
}
|
||
iv := data[:blockSize]
|
||
ciphertext := data[blockSize:]
|
||
|
||
mode := newCBCDecrypter(block, iv)
|
||
plaintext := make([]byte, len(ciphertext))
|
||
mode.CryptBlocks(plaintext, ciphertext)
|
||
|
||
plaintext, err = pkcs7UnPadding(plaintext)
|
||
if err != nil {
|
||
return nil, fmt.Errorf("去除填充失败: %v", err)
|
||
}
|
||
|
||
return plaintext, nil
|
||
}
|
||
|
||
// ============================================================
|
||
// SM4 纯Go实现
|
||
// ============================================================
|
||
|
||
type sm4Cipher struct {
|
||
sk [32]uint32
|
||
}
|
||
|
||
func newSM4Cipher(key []byte) (*sm4Cipher, error) {
|
||
if len(key) != 16 {
|
||
return nil, fmt.Errorf("SM4密钥长度必须为16字节")
|
||
}
|
||
c := &sm4Cipher{}
|
||
c.sm4KeyInit(key)
|
||
return c, nil
|
||
}
|
||
|
||
func (c *sm4Cipher) BlockSize() int { return 16 }
|
||
|
||
func (c *sm4Cipher) Encrypt(dst, src []byte) {
|
||
c.sm4OneRound(dst, src, c.sk)
|
||
}
|
||
|
||
func (c *sm4Cipher) Decrypt(dst, src []byte) {
|
||
var rk [32]uint32
|
||
for i := 0; i < 32; i++ {
|
||
rk[i] = c.sk[31-i]
|
||
}
|
||
c.sm4OneRound(dst, src, rk)
|
||
}
|
||
|
||
type sm4CBCEncrypter struct {
|
||
b *sm4Cipher
|
||
iv []byte
|
||
}
|
||
|
||
func newCBCEncrypter(b *sm4Cipher, iv []byte) *sm4CBCEncrypter {
|
||
return &sm4CBCEncrypter{b: b, iv: append([]byte{}, iv...)}
|
||
}
|
||
|
||
func (c *sm4CBCEncrypter) CryptBlocks(dst, src []byte) {
|
||
blockSize := c.b.BlockSize()
|
||
iv := make([]byte, blockSize)
|
||
copy(iv, c.iv)
|
||
for i := 0; i < len(src); i += blockSize {
|
||
for j := 0; j < blockSize; j++ {
|
||
dst[i+j] = src[i+j] ^ iv[j]
|
||
}
|
||
c.b.Encrypt(dst[i:i+blockSize], dst[i:i+blockSize])
|
||
copy(iv, dst[i:i+blockSize])
|
||
}
|
||
}
|
||
|
||
type sm4CBCDecrypter struct {
|
||
b *sm4Cipher
|
||
iv []byte
|
||
}
|
||
|
||
func newCBCDecrypter(b *sm4Cipher, iv []byte) *sm4CBCDecrypter {
|
||
return &sm4CBCDecrypter{b: b, iv: append([]byte{}, iv...)}
|
||
}
|
||
|
||
func (c *sm4CBCDecrypter) CryptBlocks(dst, src []byte) {
|
||
blockSize := c.b.BlockSize()
|
||
iv := make([]byte, blockSize)
|
||
copy(iv, c.iv)
|
||
for i := 0; i < len(src); i += blockSize {
|
||
c.b.Decrypt(dst[i:i+blockSize], src[i:i+blockSize])
|
||
for j := 0; j < blockSize; j++ {
|
||
dst[i+j] ^= iv[j]
|
||
}
|
||
copy(iv, src[i:i+blockSize])
|
||
}
|
||
}
|
||
|
||
var sm4Sbox = [256]byte{
|
||
0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
|
||
0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
|
||
0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
|
||
0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
|
||
0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
|
||
0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
|
||
0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
|
||
0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
|
||
0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
|
||
0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
|
||
0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
|
||
0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
|
||
0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
|
||
0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
|
||
0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
|
||
0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48,
|
||
}
|
||
|
||
var sm4FK = [4]uint32{0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc}
|
||
|
||
var sm4CK = [32]uint32{
|
||
0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
|
||
0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
|
||
0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
|
||
0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
|
||
0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
|
||
0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
|
||
0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
|
||
0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279,
|
||
}
|
||
|
||
func (c *sm4Cipher) sm4KeyInit(key []byte) {
|
||
var mk [4]uint32
|
||
for i := 0; i < 4; i++ {
|
||
mk[i] = uint32(key[4*i])<<24 | uint32(key[4*i+1])<<16 | uint32(key[4*i+2])<<8 | uint32(key[4*i+3])
|
||
}
|
||
|
||
var k [36]uint32
|
||
for i := 0; i < 4; i++ {
|
||
k[i] = mk[i] ^ sm4FK[i]
|
||
}
|
||
|
||
for i := 0; i < 32; i++ {
|
||
k[i+4] = k[i] ^ sm4L1(k[i+1]^k[i+2]^k[i+3]^sm4CK[i])
|
||
c.sk[i] = k[i+4]
|
||
}
|
||
}
|
||
|
||
func (c *sm4Cipher) sm4OneRound(dst, src []byte, sk [32]uint32) {
|
||
var x [36]uint32
|
||
for i := 0; i < 4; i++ {
|
||
x[i] = uint32(src[4*i])<<24 | uint32(src[4*i+1])<<16 | uint32(src[4*i+2])<<8 | uint32(src[4*i+3])
|
||
}
|
||
|
||
for i := 0; i < 32; i++ {
|
||
x[i+4] = x[i] ^ sm4L2(x[i+1]^x[i+2]^x[i+3]^sk[i])
|
||
}
|
||
|
||
for i := 0; i < 4; i++ {
|
||
dst[4*i] = byte(x[35-i] >> 24)
|
||
dst[4*i+1] = byte(x[35-i] >> 16)
|
||
dst[4*i+2] = byte(x[35-i] >> 8)
|
||
dst[4*i+3] = byte(x[35-i])
|
||
}
|
||
}
|
||
|
||
func sm4L1(b uint32) uint32 {
|
||
return b ^ sm4Rotl(b, 2) ^ sm4Rotl(b, 10) ^ sm4Rotl(b, 18) ^ sm4Rotl(b, 24)
|
||
}
|
||
|
||
func sm4L2(b uint32) uint32 {
|
||
return b ^ sm4Rotl(b, 13) ^ sm4Rotl(b, 23)
|
||
}
|
||
|
||
func sm4Rotl(x uint32, n uint32) uint32 {
|
||
return (x << n) | (x >> (32 - n))
|
||
}
|
||
|
||
// ============================================================
|
||
// RSA 签名与验签
|
||
// ============================================================
|
||
|
||
// SignWithRSA 使用RSA私钥对字符串进行签名，返回base64编码
|
||
func SignWithRSA(signStr string, privateKeyPEM string) (string, error) {
|
||
block, _ := pem.Decode([]byte(privateKeyPEM))
|
||
if block == nil {
|
||
return "", fmt.Errorf("解析PEM私钥失败")
|
||
}
|
||
|
||
privateKey, err := x509.ParsePKCS8PrivateKey(block.Bytes)
|
||
if err != nil {
|
||
privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
|
||
if err != nil {
|
||
return "", fmt.Errorf("解析私钥失败: %v", err)
|
||
}
|
||
}
|
||
|
||
rsaPrivateKey, ok := privateKey.(*rsa.PrivateKey)
|
||
if !ok {
|
||
return "", fmt.Errorf("不是RSA私钥")
|
||
}
|
||
|
||
h := sha256.New()
|
||
h.Write([]byte(signStr))
|
||
hashed := h.Sum(nil)
|
||
|
||
signature, err := rsa.SignPKCS1v15(rand.Reader, rsaPrivateKey, crypto.SHA256, hashed)
|
||
if err != nil {
|
||
return "", fmt.Errorf("签名失败: %v", err)
|
||
}
|
||
|
||
return base64.StdEncoding.EncodeToString(signature), nil
|
||
}
|
||
|
||
// VerifyWithRSA 使用RSA公钥验证签名
|
||
func VerifyWithRSA(signStr string, sign string, publicKeyPEM string) error {
|
||
block, _ := pem.Decode([]byte(publicKeyPEM))
|
||
if block == nil {
|
||
return fmt.Errorf("解析PEM公钥失败")
|
||
}
|
||
|
||
publicKey, err := x509.ParsePKIXPublicKey(block.Bytes)
|
||
if err != nil {
|
||
publicKey, err = x509.ParsePKCS1PublicKey(block.Bytes)
|
||
if err != nil {
|
||
return fmt.Errorf("解析公钥失败: %v", err)
|
||
}
|
||
}
|
||
|
||
rsaPublicKey, ok := publicKey.(*rsa.PublicKey)
|
||
if !ok {
|
||
return fmt.Errorf("不是RSA公钥")
|
||
}
|
||
|
||
signBytes, err := base64.StdEncoding.DecodeString(sign)
|
||
if err != nil {
|
||
return fmt.Errorf("base64解码签名失败: %v", err)
|
||
}
|
||
|
||
h := sha256.New()
|
||
h.Write([]byte(signStr))
|
||
hashed := h.Sum(nil)
|
||
|
||
return rsa.VerifyPKCS1v15(rsaPublicKey, crypto.SHA256, hashed, signBytes)
|
||
}
|
||
|
||
// ============================================================
|
||
// 业务参数加密/解密
|
||
// ============================================================
|
||
|
||
// EncryptBizParams 加密业务参数
|
||
// 将业务参数去掉零值，按字母排序，转JSON，然后用指定算法加密
|
||
func EncryptBizParams(params interface{}, key []byte,
|
||
|
||
## 加密实现
|
||
|
||
以下是从加密工具获取的完整实现：
|
||
|
||
### 加密实现 1
|
||
|
||
{
|
||
"success": true,
|
||
"data": "\n### 时间戳和随机数生成规范\n\n**代码模板**：\n\n```go\npackage crypto\n\nimport (\n \"crypto/rand\"\n \"fmt\"\n \"math/big\"\n \"time\"\n)\n\n// GenerateTimestamp 生成秒级时间戳\nfunc GenerateTimestamp() string {\n return fmt.Sprintf(\"%d\", time.Now().Unix())\n}\n\n// GenerateTimestampMillis 生成毫秒级时间戳\nfunc GenerateTimestampMillis() string {\n return fmt.Sprintf(\"%d\", time.Now().UnixMilli())\n}\n\n// GenerateNonce 生成指定长度的随机字符串（加密安全）\nfunc GenerateNonce(length int) (string, error) {\n const charset = \"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789\"\n b := make([]byte, length)\n for i := range b {\n num, err := rand.Int(rand.Reader, big.NewInt(int64(len(charset))))\n if err != nil {\n return \"\", err\n }\n b[i] = charset[num.Int64()]\n }\n return string(b), nil\n}\n```\n\n**注意事项**：\n- 确认文档要求的是秒级还是毫秒级时间戳\n- 确认nonce的长度要求（通常16-32位）\n- 生产环境建议使用加密安全的随机数生成器\n",
|
||
"tool": "nonce_timestamp"
|
||
}
|
||
|
||
### 加密实现 2
|
||
|
||
{
|
||
"success": true,
|
||
"data": "\n### 参数拼接规范\n\n**常见拼接方式**：\n\n1. **字典序排序**：按key字典序排序后拼接 `key=value\u0026key2=value2`\n2. **固定顺序**：按文档指定顺序拼接\n3. **JSON字符串**：整个请求体作为签名串\n\n**代码模板**：\n\n```go\npackage crypto\n\nimport (\n \"fmt\"\n \"sort\"\n \"strings\"\n)\n\n// BuildSignString 方式1：字典序排序拼接\nfunc BuildSignString(params map[string]string) string {\n keys := make([]string, 0, len(params))\n for k, v := range params {\n if v != \"\" \u0026\u0026 k != \"sign\" \u0026\u0026 k != \"signature\" {\n keys = append(keys, k)\n }\n }\n sort.Strings(keys)\n \n var parts []string\n for _, k := range keys {\n parts = append(parts, fmt.Sprintf(\"%s=%s\", k, params[k]))\n }\n return strings.Join(parts, \"\u0026\")\n}\n\n// BuildSignStringOrdered 方式2：固定顺序拼接\nfunc BuildSignStringOrdered(params map[string]string, orderedKeys []string) string {\n var parts []string\n for _, k := range orderedKeys {\n if v, ok := params[k]; ok \u0026\u0026 v != \"\" {\n parts = append(parts, fmt.Sprintf(\"%s=%s\", k, v))\n }\n }\n return strings.Join(parts, \"\u0026\")\n}\n```\n\n**注意事项**：\n- 确认文档指定的排序规则（字典序/固定顺序）\n- 确认空值是否要包含（通常排除空值）\n- 确认是否需要URL编码\n- 注意排除签名字段本身\n",
|
||
"tool": "param_concat"
|
||
}
|
||
|
||
### 加密实现 3
|
||
|
||
{
|
||
"success": true,
|
||
"data": "\n### AES-ECB 加密完整实现指南\n\n**配置参数**：\n- 密钥长度: 16 字节\n- 编码方式: base64\n\n**完整代码模板**：\n\n```go\npackage crypto\n\nimport (\n \"crypto/aes\"\n \"encoding/base64\"\n \"encoding/hex\"\n \"fmt\"\n \"bytes\"\n)\n\n// AESECBEncrypt AES-ECB模式加密\nfunc AESECBEncrypt(plaintext []byte, key []byte, encoding string) (string, error) {\n block, err := aes.NewCipher(key)\n if err != nil {\n return \"\", fmt.Errorf(\"创建AES cipher失败: %v\", err)\n }\n\n padded := pkcs7Padding(plaintext, aes.BlockSize)\n\n ciphertext := make([]byte, len(padded))\n for i := 0; i \u003c len(padded); i += aes.BlockSize {\n block.Encrypt(ciphertext[i:i+aes.BlockSize], padded[i:i+aes.BlockSize])\n }\n\n if encoding == \"hex\" {\n return hex.EncodeToString(ciphertext), nil\n }\n return base64.StdEncoding.EncodeToString(ciphertext), nil\n}\n\n// AESECBDecrypt AES-ECB模式解密\nfunc AESECBDecrypt(encryptedData string, key []byte, encoding string) ([]byte, error) {\n var ciphertext []byte\n var err error\n \n if encoding == \"hex\" {\n ciphertext, err = hex.DecodeString(encryptedData)\n } else {\n ciphertext, err = base64.StdEncoding.DecodeString(encryptedData)\n }\n if err != nil {\n return nil, fmt.Errorf(\"解码失败: %v\", err)\n }\n\n block, err := aes.NewCipher(key)\n if err != nil {\n return nil, fmt.Errorf(\"创建AES cipher失败: %v\", err)\n }\n\n if len(ciphertext)%aes.BlockSize != 0 {\n return nil, fmt.Errorf(\"密文长度不是块大小的整数倍\")\n }\n\n plaintext := make([]byte, len(ciphertext))\n for i := 0; i \u003c len(ciphertext); i += aes.BlockSize {\n block.Decrypt(plaintext[i:i+aes.BlockSize], ciphertext[i:i+aes.BlockSize])\n }\n\n plaintext, err = pkcs7UnPadding(plaintext)\n if err != nil {\n return nil, fmt.Errorf(\"去除填充失败: %v\", err)\n }\n\n return plaintext, nil\n}\n```\n\n%!(EXTRA string=16)",
|
||
"tool": "aes_ecb_encrypt"
|
||
}
|
||
|
||
### 加密实现 4
|
||
|
||
{
|
||
"success": true,
|
||
"data": "\n### SM4-CBC 国密对称加密完整实现指南\n\n**前置要求**：\n```bash\ngo get github.com/tjfoc/gmsm\n```\n\n**配置参数**：\n- 编码方式: base64\n\n**完整代码模板**：\n\n```go\npackage crypto\n\nimport (\n \"crypto/cipher\"\n \"crypto/rand\"\n \"encoding/base64\"\n \"encoding/hex\"\n \"fmt\"\n \"io\"\n \"bytes\"\n \"github.com/tjfoc/gmsm/sm4\"\n)\n\n// SM4CBCEncrypt SM4-CBC模式加密\nfunc SM4CBCEncrypt(plaintext []byte, key []byte) (string, error) {\n if len(key) != 16 {\n return \"\", fmt.Errorf(\"SM4密钥长度必须为16字节\")\n }\n\n block, err := sm4.NewCipher(key)\n if err != nil {\n return \"\", fmt.Errorf(\"创建SM4 cipher失败: %v\", err)\n }\n\n padded := pkcs7Padding(plaintext, block.BlockSize())\n\n iv := make([]byte, block.BlockSize())\n if _, err := io.ReadFull(rand.Reader, iv); err != nil {\n return \"\", fmt.Errorf(\"生成IV失败: %v\", err)\n }\n\n mode := cipher.NewCBCEncrypter(block, iv)\n ciphertext := make([]byte, len(padded))\n mode.CryptBlocks(ciphertext, padded)\n\n result := append(iv, ciphertext...)\n if \"base64\" == \"hex\" {\n return hex.EncodeToString(result), nil\n }\n return base64.StdEncoding.EncodeToString(result), nil\n}\n\n// SM4CBCDecrypt SM4-CBC模式解密\nfunc SM4CBCDecrypt(encryptedData string, key []byte) ([]byte, error) {\n if len(key) != 16 {\n return nil, fmt.Errorf(\"SM4密钥长度必须为16字节\")\n }\n\n var data []byte\n var err error\n if \"base64\" == \"hex\" {\n data, err = hex.DecodeString(encryptedData)\n } else {\n data, err = base64.StdEncoding.DecodeString(encryptedData)\n }\n if err != nil {\n return nil, fmt.Errorf(\"解码失败: %v\", err)\n }\n\n block, err := sm4.NewCipher(key)\n if err != nil {\n return nil, fmt.Errorf(\"创建SM4 cipher失败: %v\", err)\n }\n\n blockSize := block.BlockSize()\n if len(data) \u003c blockSize {\n return nil, fmt.Errorf(\"数据长度不足\")\n }\n iv := data[:blockSize]\n ciphertext := data[blockSize:]\n\n mode := cipher.NewCBCDecrypter(block, iv)\n plaintext := make([]byte, len(ciphertext))\n mode.CryptBlocks(plaintext, ciphertext)\n\n plaintext, err = pkcs7UnPadding(plaintext)\n if err != nil {\n return nil, fmt.Errorf(\"去除填充失败: %v\", err)\n }\n\n return plaintext, nil\n}\n```\n\n**注意事项**：\n- SM4 密钥固定为 16 字节\n- IV 必须随机生成且每次不同\n",
|
||
"tool": "sm4_cbc_encrypt"
|
||
}
|
||
|
||
### 加密实现 5
|
||
|
||
{
|
||
"success": true,
|
||
"data": "\n### RSA签名完整实现指南\n\n**适用场景**：文档要求使用RSA私钥对请求参数进行签名\n\n**配置参数**：\n- 哈希算法: SHA256\n- 编码方式: base64\n\n**完整代码模板**：\n```go\npackage crypto\n\nimport (\n \"crypto\"\n \"crypto/rand\"\n \"crypto/rsa\"\n \"crypto/sha256\"\n \"crypto/sha512\"\n \"crypto/x509\"\n \"encoding/base64\"\n \"encoding/hex\"\n \"encoding/pem\"\n \"fmt\"\n \"sort\"\n \"strings\"\n)\n\n// RSAConfig RSA签名配置\ntype RSAConfig struct {\n PrivateKeyPEM string // PEM格式的私钥\n KeyID string // 密钥ID（如文档要求携带）\n}\n\n// SignWithRSA 使用RSA私钥对请求进行签名\nfunc SignWithRSA(params map[string]string, config *RSAConfig) (string, error) {\n // 1. 拼接参数（按字典序排序）\n keys := make([]string, 0, len(params))\n for k := range params {\n if k != \"sign\" \u0026\u0026 k != \"signature\" {\n keys = append(keys, k)\n }\n }\n sort.Strings(keys)\n \n var sb strings.Builder\n for _, k := range keys {\n if sb.Len() \u003e 0 {\n sb.WriteString(\"\u0026\")\n }\n sb.WriteString(k)\n sb.WriteString(\"=\")\n sb.WriteString(params[k])\n }\n signStr := sb.String()\n \n // 2. 加载私钥\n block, _ := pem.Decode([]byte(config.PrivateKeyPEM))\n if block == nil {\n return \"\", fmt.Errorf(\"failed to decode PEM private key\")\n }\n \n privateKey, err := x509.ParsePKCS8PrivateKey(block.Bytes)\n if err != nil {\n // 尝试PKCS1格式\n privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)\n if err != nil {\n return \"\", fmt.Errorf(\"failed to parse private key: %v\", err)\n }\n }\n \n rsaPrivateKey, ok := privateKey.(*rsa.PrivateKey)\n if !ok {\n return \"\", fmt.Errorf(\"not a RSA private key\")\n }\n \n // 3. 计算哈希\n var hashed []byte\n var hashFunc crypto.Hash\n \n switch \"SHA256\" {\n case \"SHA384\":\n h := sha512.New384()\n h.Write([]byte(signStr))\n hashed = h.Sum(nil)\n hashFunc = crypto.SHA384\n case \"SHA512\":\n h := sha512.New()\n h.Write([]byte(signStr))\n hashed = h.Sum(nil)\n hashFunc = crypto.SHA512\n default: // SHA256\n h := sha256.New()\n h.Write([]byte(signStr))\n hashed = h.Sum(nil)\n hashFunc = crypto.SHA256\n }\n \n // 4. RSA签名\n signature, err := rsa.SignPKCS1v15(rand.Reader, rsaPrivateKey, hashFunc, hashed)\n if err != nil {\n return \"\", err\n }\n \n // 5. 编码\n if \"base64\" == \"hex\" {\n return hex.EncodeToString(signature), nil\n }\n return base64.StdEncoding.EncodeToString(signature), nil\n}\n```\n\n**注意事项**：\n- 确认文档使用的是 PKCS1 还是 PKCS8 格式\n- 确认是否需要添加额外的固定盐值\n- 确认编码是 Base64 还是 Hex\n- 注意排除签名字段本身（sign/signature）\n",
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"tool": "rsa_sign"
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}
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