commit e26d03a35a76f97466e5ac5fe89a8fcefb3b6b16
Author: Yun <yun@yun.ink>
Date:   Mon Nov 4 12:10:36 2024 +0800

    BOP的签名

diff --git a/api.go b/api.go
new file mode 100644
index 0000000..3a890b5
--- /dev/null
+++ b/api.go
@@ -0,0 +1,84 @@
+package bopx
+
+import (
+	"crypto/md5"
+	"fmt"
+	"sort"
+	"strings"
+
+	"code.yun.ink/pkg/convx"
+)
+
+// 缺点
+// 1.值必须是字符串，数组/对象这些不允许，或者需要通过一定规则转成字符串
+
+type apix struct {
+	ingoreKey []string
+	signKey   string
+}
+
+func NewApi(ignoreKey []string, signKey string) *apix {
+	return &apix{
+		ingoreKey: ignoreKey,
+		signKey:   signKey,
+	}
+}
+
+// 签名规则
+// 1.除掉不参与签名的用户参数
+// 1.所有参数的key根据字典排序
+// 2.根据key=val&key2=val2的格式组装字符串
+// 3.后面拼接用户签名key `&key=xxxx`得道新字符串
+// 4.把新字符串用md5加密并转大写的道签名的值
+func (l *apix) GetSign(params map[string]interface{}) (sign string, err error) {
+	for _, val := range l.ingoreKey {
+		delete(params, val)
+	}
+
+	// 排序
+	keys := make([]string, len(params))
+	i := 0
+	for k := range params {
+		keys[i] = k
+		i++
+	}
+	sort.Strings(keys)
+	var str string
+	for k, v := range keys {
+		if k > 0 {
+			str = str + "&"
+		}
+		val, err := convx.ToString(params[v])
+		if err != nil {
+			return "", err
+		}
+		str = str + v + "=" + val
+	}
+	str = str + "&key=" + l.signKey
+	data := []byte(str)
+	has := md5.Sum(data)
+	md5str1 := fmt.Sprintf("%x", has) // []byte转16进制
+	sign = strings.ToUpper(md5str1)
+	return sign, nil
+}
+
+func (l *apix) Verify(params map[string]interface{}) error {
+
+	sign, ok := params["sign"]
+	if !ok {
+		return ErrorSignParamNotExist
+	}
+	sitn_str, ok := sign.(string)
+	if !ok {
+		return ErrorSignMustBeString
+	}
+	g_sign, err := l.GetSign(params)
+	if err != nil {
+		return err
+	}
+	if sitn_str != g_sign {
+		return ErrorSignFail
+	}
+
+	return nil
+}
diff --git a/errorx.go b/errorx.go
new file mode 100644
index 0000000..f5d1602
--- /dev/null
+++ b/errorx.go
@@ -0,0 +1,9 @@
+package bopx
+
+import "errors"
+
+var (
+	ErrorSignParamNotExist = errors.New("签名参数不存在")
+	ErrorSignMustBeString  = errors.New("sign必须是字符串")
+	ErrorSignFail          = errors.New("验签失败")
+)
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..be0dd71
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module code.yun.ink/pkg/bopx
+
+go 1.20
+
+require code.yun.ink/pkg/convx v1.0.1
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..fe3664f
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+code.yun.ink/pkg/convx v1.0.1 h1:T6yIVqyC1nQc9CO0C7iHn5rs7GxbaulmrJtxwg95q9Y=
+code.yun.ink/pkg/convx v1.0.1/go.mod h1:6xqmUend1kwarRvJ0TQlfzzS4QCWdRrXQiUY/ggzYqo=
diff --git a/platform.go b/platform.go
new file mode 100644
index 0000000..c1b229f
--- /dev/null
+++ b/platform.go
@@ -0,0 +1,75 @@
+// 这个方法适配BOP的签名
+package bopx
+
+import (
+	"crypto/md5"
+	"fmt"
+	"sort"
+	"strings"
+
+	"code.yun.ink/pkg/convx"
+)
+
+type platform struct {
+	ingoreKey []string
+	signKey   string
+}
+
+func NewPlatform(ignoreKey []string, signKey string) *platform {
+	return &platform{
+		ingoreKey: ignoreKey,
+		signKey:   signKey,
+	}
+}
+
+func (l *platform) GetSign(params map[string]interface{}) (sign string, err error) {
+	for _, val := range l.ingoreKey {
+		delete(params, val)
+	}
+
+	// 排序
+	keys := make([]string, len(params))
+	i := 0
+	for k := range params {
+		keys[i] = k
+		i++
+	}
+	sort.Strings(keys)
+	var str string
+	for k, v := range keys {
+		if k > 0 {
+			str = str + "&"
+		}
+		val, err := convx.ToString(params[v])
+		if err != nil {
+			return "", err
+		}
+		str = str + v + "=" + val
+	}
+	str = str + "&key=" + l.signKey
+	data := []byte(str)
+	has := md5.Sum(data)
+	md5str1 := fmt.Sprintf("%x", has) // []byte转16进制
+	sign = strings.ToUpper(md5str1)
+	return sign, nil
+}
+
+func (l *platform) VerifySign(params map[string]interface{}) error {
+	sign, ok := params["sign"]
+	if !ok {
+		return ErrorSignParamNotExist
+	}
+	sitn_str, ok := sign.(string)
+	if !ok {
+		return ErrorSignMustBeString
+	}
+	g_sign, err := l.GetSign(params)
+	if err != nil {
+		return err
+	}
+	if sitn_str != g_sign {
+		return ErrorSignFail
+	}
+
+	return nil
+}
diff --git a/platform_test.go b/platform_test.go
new file mode 100644
index 0000000..332eb54
--- /dev/null
+++ b/platform_test.go
@@ -0,0 +1,30 @@
+package bopx_test
+
+import (
+	"testing"
+
+	"code.yun.ink/pkg/bopx"
+)
+
+func TestGetSign(t *testing.T) {
+	params := map[string]interface{}{
+		"name": "huang",
+		"age":  18,
+	}
+
+	// delete(params, "platform_key")
+	// delete(params, "sign")
+	// delete(params, "key")
+
+	s := bopx.NewPlatform([]string{"platform_key", "sign", "key"}, "huangxinyun")
+	sign, err := s.GetSign(params)
+	if err != nil {
+		t.Error(err)
+	}
+	t.Log(sign)
+	params["sign"] = sign
+	err = s.VerifySign(params)
+	if err != nil {
+		t.Error(err)
+	}
+}