MiFaZhan
70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
package dx
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import (
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"crypto/md5"
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"encoding/hex"
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"sort"
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"strings"
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"time"
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)
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const (
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// DefaultBaseURL 电信API基础地址
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DefaultBaseURL = "https://cmp-api.ctwing.cn:20164"
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)
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// GetTimestampGMT 返回 GMT 时区的 yyyyMMddHHmmss 格式时间戳
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func GetTimestampGMT() string {
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return time.Now().UTC().Format("20060102150405")
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}
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// OrderParams 将 URL params 按 key 字典序排序
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func OrderParams(params string) (string, error) {
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if params == "" {
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return "", nil
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}
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kvs := strings.Split(params, "&")
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m := make(map[string]string, len(kvs))
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for _, kv := range kvs {
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idx := strings.Index(kv, "=")
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if idx < 0 {
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continue
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}
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m[kv[:idx]] = kv[idx+1:]
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}
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keys := make([]string, 0, len(m))
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for k := range m {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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var parts []string
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for _, k := range keys {
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parts = append(parts, k+"="+m[k])
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}
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return strings.Join(parts, "&"), nil
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}
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// SignMD5 对 reqStr 做 MD5 加密，返回小写十六进制字符串
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func SignMD5(reqStr string) string {
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h := md5.Sum([]byte(reqStr))
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return strings.ToLower(hex.EncodeToString(h[:]))
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}
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// BuildSign 构造签名：params + body + secretKey + timestamp → MD5 → hex
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func BuildSign(params, body, secretKey, timestamp string) (string, error) {
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ordered, err := OrderParams(params)
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if err != nil {
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return "", err
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}
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reqStr := ordered + body + secretKey + timestamp
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md5Str := SignMD5(reqStr)
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return hex.EncodeToString([]byte(md5Str)), nil
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}
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// BuildSignV3 follows the V3 Java sample: encode the lowercase MD5 digest
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// string as hex a second time, then uppercase that outer encoding.
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func BuildSignV3(params, body, secretKey, timestamp string) (string, error) {
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sign, err := BuildSign(params, body, secretKey, timestamp)
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return strings.ToUpper(sign), err
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}
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