74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
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package signature
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import (
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"bytes"
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"crypto/hmac"
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"crypto/sha256"
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"encoding/base64"
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"errors"
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"fmt"
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"net/url"
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"strings"
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"time"
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"git.bvbej.com/bvbej/base-golang/pkg/time_parse"
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)
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func (s *signature) Verify(authorization, date string, path string, method string, params url.Values) (ok bool, err error) {
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if date == "" {
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err = errors.New("date required")
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return
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}
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if path == "" {
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err = errors.New("path required")
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return
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}
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if method == "" {
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err = errors.New("method required")
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return
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}
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methodName := strings.ToUpper(method)
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if !methods[methodName] {
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err = errors.New("method param error")
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return
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}
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ts, err := time_parse.ParseCSTInLocation(date)
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if err != nil {
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err = errors.New("date must follow '2006-01-02 15:04:05'")
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return
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}
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if time_parse.SubInLocation(ts) > float64(s.ttl/time.Second) {
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err = fmt.Errorf("date exceeds limit [%v]", s.ttl)
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return
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}
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// Encode() 方法中自带 sorted by key
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sortParamsEncode, err := url.QueryUnescape(params.Encode())
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if err != nil {
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err = fmt.Errorf("url QueryUnescape error [%v]", err)
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return
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}
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buffer := bytes.NewBuffer(nil)
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buffer.WriteString(path)
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buffer.WriteString(delimiter)
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buffer.WriteString(methodName)
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buffer.WriteString(delimiter)
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buffer.WriteString(sortParamsEncode)
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buffer.WriteString(delimiter)
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buffer.WriteString(date)
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// 对数据进行 hmac 加密，并进行 base64 encode
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hash := hmac.New(sha256.New, []byte(s.secret))
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hash.Write(buffer.Bytes())
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digest := base64.StdEncoding.EncodeToString(hash.Sum(nil))
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ok = authorization == fmt.Sprintf("%s %s", s.key, digest)
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return
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}
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