49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package event
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import (
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"lol.mleku.dev/chk"
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"lol.mleku.dev/errorf"
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"lol.mleku.dev/log"
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"next.orly.dev/pkg/crypto/p256k"
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"next.orly.dev/pkg/interfaces/signer"
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"next.orly.dev/pkg/utils"
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)
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// Sign the event using the signer.I. Uses github.com/bitcoin-core/secp256k1 if
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// available for much faster signatures.
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//
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// Note that this only populates the Pubkey, ID and Sig. The caller must
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// set the CreatedAt timestamp as intended.
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func (ev *E) Sign(keys signer.I) (err error) {
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ev.Pubkey = keys.Pub()
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ev.ID = ev.GetIDBytes()
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if ev.Sig, err = keys.Sign(ev.ID); chk.E(err) {
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return
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}
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return
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}
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// Verify an event is signed by the pubkey it contains. Uses
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// github.com/bitcoin-core/secp256k1 if available for faster verification.
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func (ev *E) Verify() (valid bool, err error) {
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keys := p256k.Signer{}
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if err = keys.InitPub(ev.Pubkey); chk.E(err) {
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return
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}
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if valid, err = keys.Verify(ev.ID, ev.Sig); chk.T(err) {
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// check that this isn't because of a bogus ID
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id := ev.GetIDBytes()
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if !utils.FastEqual(id, ev.ID) {
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log.E.Ln("event Subscription incorrect")
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ev.ID = id
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err = nil
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if valid, err = keys.Verify(ev.ID, ev.Sig); chk.E(err) {
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return
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}
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err = errorf.W("event Subscription incorrect but signature is valid on correct Subscription")
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}
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return
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}
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return
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}
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