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46 lines
922 B
46 lines
922 B
package wechatpayapiv2
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import (
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"bytes"
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"fmt"
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"go.dtapp.net/gomd5"
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"sort"
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"strings"
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)
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// 支付字符串拼接
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func (c *Client) getSortString(m map[string]interface{}) string {
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var buf bytes.Buffer
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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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for _, k := range keys {
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vs := m[k]
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if vs == "" {
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continue
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}
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if buf.Len() > 0 {
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buf.WriteByte('&')
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}
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buf.WriteString(k)
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buf.WriteByte('=')
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buf.WriteString(fmt.Sprintf("%v", vs))
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}
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return buf.String()
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}
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// 获取签名
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func (c *Client) getMd5Sign(paramMap map[string]interface{}) string {
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sortString := c.getSortString(paramMap)
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sign := gomd5.Md5(sortString + "&key=" + c.GetMchKey())
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return strings.ToUpper(sign)
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}
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// 验证签名
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func (c *Client) checkMd5Sign(rspMap map[string]interface{}, sign string) bool {
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calculateSign := c.getMd5Sign(rspMap)
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return calculateSign == sign
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}
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