rename files

auth-client.go

@@ -0,0 +1,71 @@
+package gortsplib
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"strings"
+)
+
+func md5Hex(in string) string {
+	h := md5.New()
+	h.Write([]byte(in))
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+// AuthClient is an object that helps a client sending its credentials to a server.
+type AuthClient struct {
+	user  string
+	pass  string
+	realm string
+	nonce string
+}
+
+// NewAuthClient allocates an AuthClient.
+// header is the WWW-Authenticate header provided by the server.
+func NewAuthClient(header []string, user string, pass string) (*AuthClient, error) {
+	headerAuthDigest := func() string {
+		for _, v := range header {
+			if strings.HasPrefix(v, "Digest ") {
+				return v
+			}
+		}
+		return ""
+	}()
+	if headerAuthDigest == "" {
+		return nil, fmt.Errorf("Authentication/Digest header not provided")
+	}
+
+	auth, err := ReadHeaderAuth(headerAuthDigest)
+	if err != nil {
+		return nil, err
+	}
+
+	nonce, ok := auth.Values["nonce"]
+	if !ok {
+		return nil, fmt.Errorf("nonce not provided")
+	}
+
+	realm, ok := auth.Values["realm"]
+	if !ok {
+		return nil, fmt.Errorf("realm not provided")
+	}
+
+	return &AuthClient{
+		user:  user,
+		pass:  pass,
+		realm: realm,
+		nonce: nonce,
+	}, nil
+}
+
+// GenerateHeader generates an Authorization Header that allows to authenticate a request with
+// the given method and path.
+func (ac *AuthClient) GenerateHeader(method string, path string) []string {
+	ha1 := md5Hex(ac.user + ":" + ac.realm + ":" + ac.pass)
+	ha2 := md5Hex(method + ":" + path)
+	response := md5Hex(ha1 + ":" + ac.nonce + ":" + ha2)
+
+	return []string{fmt.Sprintf("Digest username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
+		ac.user, ac.realm, ac.nonce, path, response)}
+}