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Fix OpenPGP key-fingerprint panic under GODEBUG=fips140=only #458
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| // Copyright 2026 The Carvel Authors. | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package git | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto" | ||
| "strings" | ||
| "testing" | ||
|
|
||
| ctlconf "carvel.dev/vendir/pkg/vendir/config" | ||
| "github.com/stretchr/testify/require" | ||
| "golang.org/x/crypto/openpgp/packet" //nolint:staticcheck | ||
| ) | ||
|
|
||
| // Fixed armored detached signatures over the literal text "hello world\n", | ||
| // pre-generated with a throwaway GPG key so these tests don't need gpg on | ||
| // PATH. approvedSig is RSA+SHA256 (FIPS-approved); legacyHashSig is the | ||
| // same RSA key forced to sign with SHA1 (non-approved hash); legacyDSASig | ||
| // is a 1024-bit DSA key (non-approved pubkey algorithm). | ||
| const ( | ||
| approvedSig = `-----BEGIN PGP SIGNATURE----- | ||
|
|
||
| iQEzBAABCAAdFiEEQLsnJrIjJBKz+S0Go2HoPiOrblcFAmqH8IQACgkQo2HoPiOr | ||
| bleXvQgAgZpJZpuaL3ku/7Oxm/OXF7g0cLwCgbpVzqieSDQ7b/SNWo/NWhPt76V8 | ||
| YH9fDXgt6yxT4ukqOvNW4ESnzLU9hRNy7Me1h83L/njhLyOqWoUaewBhcuTWTE13 | ||
| uCF2zSi2O/oCnZ8ZjwHnf6rIR9082mpI4o2zJVTmsw+L0p56fm2vM2QPMjNLNXzC | ||
| 5CjSgwLC8j+ilklW21wGJVeM+IIC35b8Dl/SqTzpvLKnREwxNdJz8CZnuYzS9KFa | ||
| 5OSaTmLFq6dy2DVRRBVPe+dfEj8E07MCNvPCAXOVgLnmqpq4gvpZ06UaHt6FfD9u | ||
| P/jc8MSTszFZiBk2ipIuuSN4NilYaA== | ||
| =sZsk | ||
| -----END PGP SIGNATURE----- | ||
| ` | ||
| legacyHashSig = `-----BEGIN PGP SIGNATURE----- | ||
|
|
||
| iQEzBAABAgAdFiEEQLsnJrIjJBKz+S0Go2HoPiOrblcFAmqH8IQACgkQo2HoPiOr | ||
| blcLdgf+OSp4P/JC9jG4x8BolhaEJOxGC0pFPbjoRex9zMzyspQzVos+oF2ARq3M | ||
| J0SWRSOd1IrDYvgCEstUJvlpWr97P6zJW830NQgr+0Wp7MN3SOkL1sjp1Ax79GmF | ||
| DyJ6UFGAslwSBWS9LnpgfOF1lhClExKf2KMMrTwpDpP2qEl/rGV3LP7nRNXBlP0s | ||
| 6AJdtEoJrUsJqYavqVT8i78juiWSD8JVFtspz15dyZ9dDA9JhTS1QjgBOGJ5sEhj | ||
| fTsbePrtmk6TgjEFrs6xt2L4LVZHt8ypyy/H3OpBOY6+/eqr4Yy60DZhV3JRZrHE | ||
| qXOThcpTEGCWYakFGjHn0mGpPPXekg== | ||
| =S6/W | ||
| -----END PGP SIGNATURE----- | ||
| ` | ||
| legacyDSASig = `-----BEGIN PGP SIGNATURE----- | ||
|
|
||
| iF0EABECAB0WIQSNpoTJgEs/HmLRkJ5eLmKg5upf1wUCaofwhAAKCRBeLmKg5upf | ||
| 10mxAKCoI6PhKxq7bNM9q/6e5kIcN/+RggCaAgMZE9LTYajEEvt4oPjfFxKbVec= | ||
| =oCds | ||
| -----END PGP SIGNATURE----- | ||
| ` | ||
| ) | ||
|
|
||
| func TestSignatureAlgorithms(t *testing.T) { | ||
| hash, algo, err := signatureAlgorithms(strings.NewReader(approvedSig)) | ||
| require.NoError(t, err) | ||
| require.Equal(t, crypto.SHA256, hash) | ||
| require.Equal(t, packet.PubKeyAlgoRSA, algo) | ||
|
|
||
| hash, algo, err = signatureAlgorithms(strings.NewReader(legacyHashSig)) | ||
| require.NoError(t, err) | ||
| require.Equal(t, crypto.SHA1, hash) | ||
| require.Equal(t, packet.PubKeyAlgoRSA, algo) | ||
|
|
||
| hash, algo, err = signatureAlgorithms(strings.NewReader(legacyDSASig)) | ||
| require.NoError(t, err) | ||
| require.Equal(t, crypto.SHA1, hash) | ||
| require.Equal(t, packet.PubKeyAlgoDSA, algo) | ||
| } | ||
|
|
||
| func TestCheckFIPSApproved(t *testing.T) { | ||
| t.Run("approved signature never errors or warns", func(t *testing.T) { | ||
| var buf bytes.Buffer | ||
| v := Verification{infoLog: &buf} | ||
| require.NoError(t, v.checkFIPSApproved("ref", approvedSig)) | ||
| require.Empty(t, buf.String()) | ||
| }) | ||
|
|
||
| t.Run("legacy hash errors by default", func(t *testing.T) { | ||
| v := Verification{infoLog: &bytes.Buffer{}} | ||
| err := v.checkFIPSApproved("myref", legacyHashSig) | ||
| require.ErrorContains(t, err, "myref") | ||
| require.ErrorContains(t, err, "hash algorithm SHA-1") | ||
| require.ErrorContains(t, err, "verification.allowLegacySignatures") | ||
| }) | ||
|
|
||
| t.Run("legacy DSA errors by default", func(t *testing.T) { | ||
| v := Verification{infoLog: &bytes.Buffer{}} | ||
| err := v.checkFIPSApproved("myref", legacyDSASig) | ||
| require.ErrorContains(t, err, "pubkey algorithm") | ||
| require.ErrorContains(t, err, "verification.allowLegacySignatures") | ||
| }) | ||
|
|
||
| t.Run("legacy signatures only warn when allowed", func(t *testing.T) { | ||
| var buf bytes.Buffer | ||
| opts := ctlconf.DirectoryContentsGitVerification{AllowLegacySignatures: true} | ||
| v := Verification{infoLog: &buf, opts: opts} | ||
|
|
||
| require.NoError(t, v.checkFIPSApproved("myref", legacyHashSig)) | ||
| require.Contains(t, buf.String(), "myref") | ||
| require.Contains(t, buf.String(), "hash algorithm SHA-1") | ||
|
|
||
| buf.Reset() | ||
| require.NoError(t, v.checkFIPSApproved("myref", legacyDSASig)) | ||
| require.Contains(t, buf.String(), "pubkey algorithm") | ||
| }) | ||
| } |
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