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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2025 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package asserts_test
import (
. "gopkg.in/check.v1"
"github.com/snapcore/snapd/asserts"
"github.com/snapcore/snapd/asserts/assertstest"
)
type cryptoSuite struct{}
var _ = Suite(&cryptoSuite{})
func (s *cryptoSuite) TestSignWithKeyAndVerifyWithKey(c *C) {
priv, _ := assertstest.GenerateKey(1024)
data := []byte("some data to verify")
signature, err := asserts.RawSignWithKey(data, priv)
c.Assert(err, IsNil)
pub := priv.PublicKey()
err = asserts.RawVerifyWithKey(data, signature, pub)
c.Check(err, IsNil)
}
func (s *cryptoSuite) TestVerifyWithKeyMismatch(c *C) {
// generate two different key pairs
privOne, _ := assertstest.GenerateKey(1024)
privTwo, _ := assertstest.GenerateKey(1024)
// sign with first key
data := []byte("some data to verify")
signature, err := asserts.RawSignWithKey(data, privOne)
c.Assert(err, IsNil)
// try to verify with wrong public key (from second key pair)
pubTwo := privTwo.PublicKey()
err = asserts.RawVerifyWithKey(data, signature, pubTwo)
c.Check(err, NotNil)
c.Check(err, ErrorMatches, ".*RSA verification failure")
}
func (s *cryptoSuite) TestVerifyWithKeyDataMismatch(c *C) {
priv, _ := assertstest.GenerateKey(1024)
pub := priv.PublicKey()
data := []byte("original data")
signature, err := asserts.RawSignWithKey(data, priv)
c.Assert(err, IsNil)
// try to verify with different data
err = asserts.RawVerifyWithKey([]byte("different data"), signature, pub)
c.Check(err, NotNil)
c.Check(err, ErrorMatches, ".*hash tag doesn't match")
}
func (s *cryptoSuite) TestVerifyWithKeyWrongSignature(c *C) {
priv, _ := assertstest.GenerateKey(1024)
pub := priv.PublicKey()
// sign two different pieces of data with the same key
dataOne := []byte("data one")
signatureOne, err := asserts.RawSignWithKey(dataOne, priv)
c.Assert(err, IsNil)
dataTwo := []byte("data two")
signatureTwo, err := asserts.RawSignWithKey(dataTwo, priv)
c.Assert(err, IsNil)
err = asserts.RawVerifyWithKey(dataOne, signatureOne, pub)
c.Check(err, IsNil)
// try to verify dataOne with signatureTwo (wrong signature for this data)
err = asserts.RawVerifyWithKey(dataOne, signatureTwo, pub)
c.Check(err, NotNil)
c.Check(err, ErrorMatches, ".*hash tag doesn't match")
}
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