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keyring -> keyer, fix misunderstanding with NIP-59 and adjust api.

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This commit is contained in:
fiatjaf
2024-09-11 11:43:49 -03:00
parent 9addd57db7
commit 5e2e0bf458
7 changed files with 74 additions and 73 deletions
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87
nip59/nip59.go
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@@ -9,83 +9,92 @@ import (
"github.com/nbd-wtf/go-nostr/nip44"
)
// Seal takes a rumor, encrypts it and returns an unsigned 'seal' event, the 'seal' must be signed
// afterwards.
func Seal(rumor nostr.Event, encrypt func(string) (string, error)) (nostr.Event, error) {
// Seal takes a 'rumor', encrypts it with our own key, making a 'seal', then encrypts that with a nonce key and
// signs that (after potentially applying a modify function, which can be nil otherwise), yielding a 'gift-wrap'.
func GiftWrap(
rumor nostr.Event,
recipientPublicKey string,
encrypt func(plaintext string) (string, error),
sign func(*nostr.Event) error,
modify func(*nostr.Event),
) (nostr.Event, error) {
rumor.Sig = ""
ciphertext, err := encrypt(rumor.String())
rumorCiphertext, err := encrypt(rumor.String())
if err != nil {
return nostr.Event{}, err
}
return nostr.Event{
seal := nostr.Event{
Kind: 13,
Content: ciphertext,
Content: rumorCiphertext,
CreatedAt: nostr.Now() - nostr.Timestamp(60*rand.Int63n(600) /* up to 6 hours in the past */),
Tags: make(nostr.Tags, 0),
}, err
}
}
if err := sign(&seal); err != nil {
return nostr.Event{}, err
}
// Takes a signed 'seal' and gift-wraps it using a random key, returns it signed.
//
// modify is a function that takes the gift-wrap before signing, can be used to apply
// NIP-13 PoW or other things, otherwise can be nil.
func GiftWrap(seal nostr.Event, recipientPublicKey string, modify func(*nostr.Event)) (nostr.Event, error) {
nonceKey := nostr.GeneratePrivateKey()
temporaryConversationKey, err := nip44.GenerateConversationKey(recipientPublicKey, nonceKey)
if err != nil {
return nostr.Event{}, err
}
ciphertext, err := nip44.Encrypt(seal.String(), temporaryConversationKey, nil)
sealCiphertext, err := nip44.Encrypt(seal.String(), temporaryConversationKey, nil)
if err != nil {
return nostr.Event{}, err
}
gw := nostr.Event{
Kind: 1059,
Content: ciphertext,
Content: sealCiphertext,
CreatedAt: nostr.Now() - nostr.Timestamp(60*rand.Int63n(600) /* up to 6 hours in the past */),
Tags: nostr.Tags{
nostr.Tag{"p", recipientPublicKey},
},
}
// apply POW if necessary
if modify != nil {
modify(&gw)
}
err = gw.Sign(nonceKey)
if err := seal.Sign(nonceKey); err != nil {
return seal, err
}
return gw, nil
}
func GiftUnwrap(gw nostr.Event, decrypt func(string) (string, error)) (seal nostr.Event, err error) {
jevt, err := decrypt(gw.Content)
if err != nil {
return seal, err
}
err = easyjson.Unmarshal([]byte(jevt), &seal)
if err != nil {
return seal, err
}
if ok, _ := seal.CheckSignature(); !ok {
return seal, fmt.Errorf("seal signature is invalid")
}
return seal, nil
}
func Unseal(seal nostr.Event, decrypt func(string) (string, error)) (rumor nostr.Event, err error) {
jevt, err := decrypt(seal.Content)
func GiftUnwrap(
gw nostr.Event,
decrypt func(otherpubkey, ciphertext string) (string, error),
) (rumor nostr.Event, err error) {
jseal, err := decrypt(gw.PubKey, gw.Content)
if err != nil {
return rumor, err
}
err = easyjson.Unmarshal([]byte(jevt), &rumor)
var seal nostr.Event
err = easyjson.Unmarshal([]byte(jseal), &seal)
if err != nil {
return rumor, err
}
if ok, _ := seal.CheckSignature(); !ok {
return rumor, fmt.Errorf("seal signature is invalid")
}
jrumor, err := decrypt(seal.PubKey, seal.Content)
if err != nil {
return rumor, err
}
err = easyjson.Unmarshal([]byte(jrumor), &rumor)
if err != nil {
return rumor, err
}
rumor.PubKey = seal.PubKey
rumor.ID = rumor.GetID()
return rumor, nil
}