55 lines
1.3 KiB
Go
55 lines
1.3 KiB
Go
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// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information.
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package auth
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import (
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"crypto/ecdsa"
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"github.com/gtank/cryptopasta"
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"storj.io/storj/pkg/pb"
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"storj.io/storj/pkg/peertls"
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"storj.io/storj/pkg/provider"
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)
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// SignatureAuthProvider interface provides access to last signature auth data
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type SignatureAuthProvider interface {
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Auth() (*pb.SignatureAuth, error)
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}
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// GenerateSignature creates signature from identity id
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func GenerateSignature(identity *provider.FullIdentity) ([]byte, error) {
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if identity == nil {
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return nil, nil
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}
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k, ok := identity.Key.(*ecdsa.PrivateKey)
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if !ok {
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return nil, peertls.ErrUnsupportedKey.New("%T", identity.Key)
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}
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signature, err := cryptopasta.Sign(identity.ID.Bytes(), k)
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if err != nil {
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return nil, err
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}
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return signature, nil
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}
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// NewSignatureAuth creates instance of signature auth data
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func NewSignatureAuth(signature []byte, identity *provider.PeerIdentity) (*pb.SignatureAuth, error) {
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k, ok := identity.Leaf.PublicKey.(*ecdsa.PublicKey)
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if !ok {
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return nil, peertls.ErrUnsupportedKey.New("%T", identity.Leaf.PublicKey)
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}
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encodedKey, err := cryptopasta.EncodePublicKey(k)
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if err != nil {
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return nil, err
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}
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return &pb.SignatureAuth{
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Data: identity.ID.Bytes(),
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Signature: signature,
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PublicKey: encodedKey,
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}, nil
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}
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