// Copyright 2012 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package clearsign import ( "bytes" "fmt" "io" "testing" "golang.org/x/crypto/openpgp" "golang.org/x/crypto/openpgp/packet" ) func testParse(t *testing.T, input []byte, expected, expectedPlaintext string) { b, rest := Decode(input) if b == nil { t.Fatal("failed to decode clearsign message") } if !bytes.Equal(rest, []byte("trailing")) { t.Errorf("unexpected remaining bytes returned: %s", string(rest)) } if b.ArmoredSignature.Type != "PGP SIGNATURE" { t.Errorf("bad armor type, got:%s, want:PGP SIGNATURE", b.ArmoredSignature.Type) } if !bytes.Equal(b.Bytes, []byte(expected)) { t.Errorf("bad body, got:%x want:%x", b.Bytes, expected) } if !bytes.Equal(b.Plaintext, []byte(expectedPlaintext)) { t.Errorf("bad plaintext, got:%x want:%x", b.Plaintext, expectedPlaintext) } keyring, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(signingKey)) if err != nil { t.Errorf("failed to parse public key: %s", err) } if _, err := openpgp.CheckDetachedSignature(keyring, bytes.NewBuffer(b.Bytes), b.ArmoredSignature.Body); err != nil { t.Errorf("failed to check signature: %s", err) } } func TestParse(t *testing.T) { testParse(t, clearsignInput, "Hello world\r\nline 2", "Hello world\nline 2\n") testParse(t, clearsignInput2, "\r\n\r\n(This message has a couple of blank lines at the start and end.)\r\n\r\n", "\n\n(This message has a couple of blank lines at the start and end.)\n\n\n") } func TestParseWithNoNewlineAtEnd(t *testing.T) { input := clearsignInput input = input[:len(input)-len("trailing")-1] b, rest := Decode(input) if b == nil { t.Fatal("failed to decode clearsign message") } if len(rest) > 0 { t.Errorf("unexpected remaining bytes returned: %s", string(rest)) } } var signingTests = []struct { in, signed, plaintext string }{ {"", "", ""}, {"a", "a", "a\n"}, {"a\n", "a", "a\n"}, {"-a\n", "-a", "-a\n"}, {"--a\nb", "--a\r\nb", "--a\nb\n"}, // leading whitespace {" a\n", " a", " a\n"}, {" a\n", " a", " a\n"}, // trailing whitespace (should be stripped) {"a \n", "a", "a\n"}, {"a ", "a", "a\n"}, // whitespace-only lines (should be stripped) {" \n", "", "\n"}, {" ", "", "\n"}, {"a\n \n \nb\n", "a\r\n\r\n\r\nb", "a\n\n\nb\n"}, } func TestSigning(t *testing.T) { keyring, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(signingKey)) if err != nil { t.Errorf("failed to parse public key: %s", err) } for i, test := range signingTests { var buf bytes.Buffer plaintext, err := Encode(&buf, keyring[0].PrivateKey, nil) if err != nil { t.Errorf("#%d: error from Encode: %s", i, err) continue } if _, err := plaintext.Write([]byte(test.in)); err != nil { t.Errorf("#%d: error from Write: %s", i, err) continue } if err := plaintext.Close(); err != nil { t.Fatalf("#%d: error from Close: %s", i, err) continue } b, _ := Decode(buf.Bytes()) if b == nil { t.Errorf("#%d: failed to decode clearsign message", i) continue } if !bytes.Equal(b.Bytes, []byte(test.signed)) { t.Errorf("#%d: bad result, got:%x, want:%x", i, b.Bytes, test.signed) continue } if !bytes.Equal(b.Plaintext, []byte(test.plaintext)) { t.Errorf("#%d: bad result, got:%x, want:%x", i, b.Plaintext, test.plaintext) continue } if _, err := openpgp.CheckDetachedSignature(keyring, bytes.NewBuffer(b.Bytes), b.ArmoredSignature.Body); err != nil { t.Errorf("#%d: failed to check signature: %s", i, err) } } } // We use this to make test keys, so that they aren't all the same. type quickRand byte func (qr *quickRand) Read(p []byte) (int, error) { for i := range p { p[i] = byte(*qr) } *qr++ return len(p), nil } func TestMultiSign(t *testing.T) { if testing.Short() { t.Skip("skipping long test in -short mode") } zero := quickRand(0) config := packet.Config{Rand: &zero} for nKeys := 0; nKeys < 4; nKeys++ { nextTest: for nExtra := 0; nExtra < 4; nExtra++ { var signKeys []*packet.PrivateKey var verifyKeys openpgp.EntityList desc := fmt.Sprintf("%d keys; %d of which will be used to verify", nKeys+nExtra, nKeys) for i := 0; i < nKeys+nExtra; i++ { e, err := openpgp.NewEntity("name", "comment", "email", &config) if err != nil { t.Errorf("cannot create key: %v", err) continue nextTest } if i < nKeys { verifyKeys = append(verifyKeys, e) } signKeys = append(signKeys, e.PrivateKey) } input := []byte("this is random text\r\n4 17") var output bytes.Buffer w, err := EncodeMulti(&output, signKeys, nil) if err != nil { t.Errorf("EncodeMulti (%s) failed: %v", desc, err) } if _, err := w.Write(input); err != nil { t.Errorf("Write(%q) to signer (%s) failed: %v", string(input), desc, err) } if err := w.Close(); err != nil { t.Errorf("Close() of signer (%s) failed: %v", desc, err) } block, _ := Decode(output.Bytes()) if string(block.Bytes) != string(input) { t.Errorf("Inline data didn't match original; got %q want %q", string(block.Bytes), string(input)) } _, err = openpgp.CheckDetachedSignature(verifyKeys, bytes.NewReader(block.Bytes), block.ArmoredSignature.Body) if nKeys == 0 { if err == nil { t.Errorf("verifying inline (%s) succeeded; want failure", desc) } } else { if err != nil { t.Errorf("verifying inline (%s) failed (%v); want success", desc, err) } } } } } func TestDecodeMissingCRC(t *testing.T) { block, rest := Decode(clearsignInput3) if block == nil { t.Fatal("failed to decode PGP signature missing a CRC") } if len(rest) > 0 { t.Fatalf("Decode should not have any remaining data left: %s", rest) } if _, err := packet.Read(block.ArmoredSignature.Body); err != nil { t.Error(err) } if _, err := packet.Read(block.ArmoredSignature.Body); err != io.EOF { t.Error(err) } } const signatureBlock = ` -----BEGIN PGP SIGNATURE----- Version: OpenPrivacy 0.99 yDgBO22WxBHv7O8X7O/jygAEzol56iUKiXmV+XmpCtmpqQUKiQrFqclFqUDBovzS vBSFjNSiVHsuAA== =njUN -----END PGP SIGNATURE----- ` var invalidInputs = []string{ ` -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 (This message was truncated.) `, ` -----BEGIN PGP SIGNED MESSAGE-----garbage Hash: SHA256 _o/ ` + signatureBlock, ` garbage-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 _o/ ` + signatureBlock, ` -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA` + "\x0b\x0b" + `256 _o/ ` + signatureBlock, ` -----BEGIN PGP SIGNED MESSAGE----- NotHash: SHA256 _o/ ` + signatureBlock, } func TestParseInvalid(t *testing.T) { for i, input := range invalidInputs { if b, rest := Decode([]byte(input)); b != nil { t.Errorf("#%d: decoded a bad clearsigned message without any error", i) } else if string(rest) != input { t.Errorf("#%d: did not return all data with a bad message", i) } } } var clearsignInput = []byte(` ;lasjlkfdsa -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello world line 2 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iJwEAQECAAYFAk8kMuEACgkQO9o98PRieSpMsAQAhmY/vwmNpflrPgmfWsYhk5O8 pjnBUzZwqTDoDeINjZEoPDSpQAHGhjFjgaDx/Gj4fAl0dM4D0wuUEBb6QOrwflog 2A2k9kfSOMOtk0IH/H5VuFN1Mie9L/erYXjTQIptv9t9J7NoRBMU0QOOaFU0JaO9 MyTpno24AjIAGb+mH1U= =hIJ6 -----END PGP SIGNATURE----- trailing`) var clearsignInput2 = []byte(` asdlfkjasdlkfjsadf -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 (This message has a couple of blank lines at the start and end.) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iJwEAQEIAAYFAlPpSREACgkQO9o98PRieSpZTAP+M8QUoCt/7Rf3YbXPcdzIL32v pt1I+cMNeopzfLy0u4ioEFi8s5VkwpL1AFmirvgViCwlf82inoRxzZRiW05JQ5LI ESEzeCoy2LIdRCQ2hcrG8pIUPzUO4TqO5D/dMbdHwNH4h5nNmGJUAEG6FpURlPm+ qZg6BaTvOxepqOxnhVU= =e+C6 -----END PGP SIGNATURE----- trailing`) var clearsignInput3 = []byte(`-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Origin: vscode stable Label: vscode stable Suite: stable Codename: stable Date: Mon, 13 Jan 2020 08:41:45 UTC Architectures: amd64 Components: main Description: Generated by aptly MD5Sum: 66437152b3082616d8053e52c4bafafb 5821166 Contents-amd64 8024662ed51109946a517754bbafdd33 286298 Contents-amd64.gz 66437152b3082616d8053e52c4bafafb 5821166 main/Contents-amd64 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PGP SIGNATURE----- Version: BSN Pgp v1.0.0.0 iQEcBAEBCAAGBQJeHC1bAAoJEOs+lK2+EinPAg8H/1rrhcgfm1HYL+Vmr9Ns6ton LWQ8r13ADN66UTRa3XsO9V+q1fYowTqpXq6EZt2Gmlby/cpDf7mFPM5IteOXWLl7 QcWxPKHcdPIUi+h5F7BkFW65imP9GyX+V5Pxx5X544op7hYKaI0gAQ1oYtWDb3HE 4D27fju6icbj8w6E8TePcrDn82UvWAcaI5WSLboyhXCt2DxS3PNGFlyaP58zKJ8F 9cbBzksuMgMaTPAAMrU0zrFGfGeQz0Yo6nV/gRGiQaL9pSeIJWSKLNCMG/nIGmv2 xHVNFqTEetREY6UcQmuhwOn4HezyigH6XCBVp/Uez1izXiNdwBOet34SSvnkuJ4= -----END PGP SIGNATURE-----`) var signingKey = `-----BEGIN PGP PRIVATE KEY BLOCK----- Version: GnuPG v1.4.10 (GNU/Linux) lQHYBE2rFNoBBADFwqWQIW/DSqcB4yCQqnAFTJ27qS5AnB46ccAdw3u4Greeu3Bp idpoHdjULy7zSKlwR1EA873dO/k/e11Ml3dlAFUinWeejWaK2ugFP6JjiieSsrKn vWNicdCS4HTWn0X4sjl0ZiAygw6GNhqEQ3cpLeL0g8E9hnYzJKQ0LWJa0QARAQAB AAP/TB81EIo2VYNmTq0pK1ZXwUpxCrvAAIG3hwKjEzHcbQznsjNvPUihZ+NZQ6+X 0HCfPAdPkGDCLCb6NavcSW+iNnLTrdDnSI6+3BbIONqWWdRDYJhqZCkqmG6zqSfL IdkJgCw94taUg5BWP/AAeQrhzjChvpMQTVKQL5mnuZbUCeMCAN5qrYMP2S9iKdnk 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