54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
package streamtoken
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import (
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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// Claims holds everything a stateless proxy or transcode node needs
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// to serve a streaming session without database access.
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type Claims struct {
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SessionID string `json:"sid"`
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MediaPath string `json:"path"`
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PlayMethod string `json:"method"`
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TranscodeAudio bool `json:"ta,omitempty"`
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TranscodeNode string `json:"tnode,omitempty"`
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TargetCodec string `json:"tc,omitempty"`
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TargetRes string `json:"tres,omitempty"`
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AudioCodec string `json:"ac,omitempty"`
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AudioChannels int `json:"ach,omitempty"`
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AudioTrackIndex int `json:"ati,omitempty"`
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jwt.RegisteredClaims
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}
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// Sign creates a signed JWT string from the given claims.
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func Sign(c Claims, secret string, ttl time.Duration) (string, error) {
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now := time.Now()
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c.RegisteredClaims = jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(now.Add(ttl)),
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IssuedAt: jwt.NewNumericDate(now),
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, c)
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return token.SignedString([]byte(secret))
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}
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// Verify parses and validates a stream token JWT string.
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func Verify(tokenString, secret string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (any, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(secret), nil
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})
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if err != nil {
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return nil, fmt.Errorf("invalid stream token: %w", err)
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}
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claims, ok := token.Claims.(*Claims)
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if !ok || !token.Valid {
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return nil, fmt.Errorf("invalid stream token claims")
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}
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return claims, nil
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}
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