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|
package auth
import (
"context"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"fmt"
"time"
"code.northwest.io/nostr"
)
// NostrCredentials implements credentials.PerRPCCredentials for NIP-98 auth.
type NostrCredentials struct {
key *nostr.Key
includePayload bool
}
func NewNostrCredentials(key *nostr.Key) *NostrCredentials {
return &NostrCredentials{
key: key,
includePayload: false,
}
}
func NewNostrCredentialsWithPayload(key *nostr.Key) *NostrCredentials {
return &NostrCredentials{
key: key,
includePayload: true,
}
}
func (n *NostrCredentials) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
if len(uri) == 0 {
return nil, fmt.Errorf("no URI provided")
}
event := &nostr.Event{
PubKey: n.key.Public(),
CreatedAt: time.Now().Unix(),
Kind: 27235,
Tags: nostr.Tags{},
Content: "",
}
event.Tags = append(event.Tags, nostr.Tag{"u", uri[0]})
event.Tags = append(event.Tags, nostr.Tag{"method", "POST"})
if err := n.key.Sign(event); err != nil {
return nil, fmt.Errorf("failed to sign auth event: %w", err)
}
eventJSON, err := json.Marshal(event)
if err != nil {
return nil, fmt.Errorf("failed to marshal auth event: %w", err)
}
authHeader := "Nostr " + base64.StdEncoding.EncodeToString(eventJSON)
return map[string]string{
"authorization": authHeader,
}, nil
}
func (n *NostrCredentials) RequireTransportSecurity() bool {
return false
}
type NostrCredentialsWithTLS struct {
*NostrCredentials
}
func NewNostrCredentialsWithTLS(key *nostr.Key) *NostrCredentialsWithTLS {
return &NostrCredentialsWithTLS{
NostrCredentials: NewNostrCredentials(key),
}
}
func (n *NostrCredentialsWithTLS) RequireTransportSecurity() bool {
return true
}
func HashPayload(payload []byte) string {
hash := sha256.Sum256(payload)
return fmt.Sprintf("%x", hash)
}
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