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havekey.go
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havekey.go
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package gpg
import (
"bytes"
"crypto/ecdsa"
"crypto/rsa"
"fmt"
openpgpecdsa "github.com/ProtonMail/go-crypto/openpgp/ecdsa"
)
// Keygrips returns a slice of keygrip byteslices; one for each cryptographic
// key available on the keyservice.
func (g *KeyService) Keygrips() ([][]byte, error) {
var grips [][]byte
var kg []byte
var err error
for _, keyfile := range g.privKeys {
for _, privKey := range keyfile.keys {
switch openpgpPubKey := privKey.PublicKey.PublicKey.(type) {
case *rsa.PublicKey:
kg, err = keygripRSA(openpgpPubKey)
if err != nil {
return nil, fmt.Errorf("couldn't get keygrip: %w", err)
}
case *openpgpecdsa.PublicKey:
pubKey, err := ecdsaPublicKey(openpgpPubKey)
if err != nil {
return nil, fmt.Errorf("couldn't convert ecdsa public key: %v", err)
}
kg, err = KeygripECDSA(pubKey)
if err != nil {
return nil, fmt.Errorf("couldn't get keygrip: %w", err)
}
default:
// unknown public key type
continue
}
grips = append(grips, kg)
}
}
return grips, nil
}
// HaveKey takes a list of keygrips, and returns a boolean indicating if any of
// the given keygrips were found, the found keygrip, and an error, if any.
func (g *KeyService) HaveKey(keygrips [][]byte) (bool, []byte, error) {
for _, keyfile := range g.privKeys {
for _, privKey := range keyfile.keys {
switch pubKey := privKey.PublicKey.PublicKey.(type) {
case *rsa.PublicKey:
for _, kg := range keygrips {
rsaKG, err := keygripRSA(pubKey)
if err != nil {
return false, nil, err
}
if bytes.Equal(kg, rsaKG) {
return true, kg, nil
}
}
case *ecdsa.PublicKey:
for _, kg := range keygrips {
ecdsaKG, err := KeygripECDSA(pubKey)
if err != nil {
return false, nil, err
}
if bytes.Equal(kg, ecdsaKG) {
return true, kg, nil
}
}
default:
// unknown public key type
continue
}
}
}
return false, nil, nil
}