1
2
3
4
5 package clearsign
6
7 import (
8 "bytes"
9 "fmt"
10 "io"
11 "testing"
12
13 "golang.org/x/crypto/openpgp"
14 "golang.org/x/crypto/openpgp/packet"
15 )
16
17 func testParse(t *testing.T, input []byte, expected, expectedPlaintext string) {
18 b, rest := Decode(input)
19 if b == nil {
20 t.Fatal("failed to decode clearsign message")
21 }
22 if !bytes.Equal(rest, []byte("trailing")) {
23 t.Errorf("unexpected remaining bytes returned: %s", string(rest))
24 }
25 if b.ArmoredSignature.Type != "PGP SIGNATURE" {
26 t.Errorf("bad armor type, got:%s, want:PGP SIGNATURE", b.ArmoredSignature.Type)
27 }
28 if !bytes.Equal(b.Bytes, []byte(expected)) {
29 t.Errorf("bad body, got:%x want:%x", b.Bytes, expected)
30 }
31
32 if !bytes.Equal(b.Plaintext, []byte(expectedPlaintext)) {
33 t.Errorf("bad plaintext, got:%x want:%x", b.Plaintext, expectedPlaintext)
34 }
35
36 keyring, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(signingKey))
37 if err != nil {
38 t.Errorf("failed to parse public key: %s", err)
39 }
40
41 if _, err := openpgp.CheckDetachedSignature(keyring, bytes.NewBuffer(b.Bytes), b.ArmoredSignature.Body); err != nil {
42 t.Errorf("failed to check signature: %s", err)
43 }
44 }
45
46 func TestParse(t *testing.T) {
47 testParse(t, clearsignInput, "Hello world\r\nline 2", "Hello world\nline 2\n")
48 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")
49 }
50
51 func TestParseWithNoNewlineAtEnd(t *testing.T) {
52 input := clearsignInput
53 input = input[:len(input)-len("trailing")-1]
54 b, rest := Decode(input)
55 if b == nil {
56 t.Fatal("failed to decode clearsign message")
57 }
58 if len(rest) > 0 {
59 t.Errorf("unexpected remaining bytes returned: %s", string(rest))
60 }
61 }
62
63 var signingTests = []struct {
64 in, signed, plaintext string
65 }{
66 {"", "", ""},
67 {"a", "a", "a\n"},
68 {"a\n", "a", "a\n"},
69 {"-a\n", "-a", "-a\n"},
70 {"--a\nb", "--a\r\nb", "--a\nb\n"},
71
72 {" a\n", " a", " a\n"},
73 {" a\n", " a", " a\n"},
74
75 {"a \n", "a", "a\n"},
76 {"a ", "a", "a\n"},
77
78 {" \n", "", "\n"},
79 {" ", "", "\n"},
80 {"a\n \n \nb\n", "a\r\n\r\n\r\nb", "a\n\n\nb\n"},
81 }
82
83 func TestSigning(t *testing.T) {
84 keyring, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(signingKey))
85 if err != nil {
86 t.Errorf("failed to parse public key: %s", err)
87 }
88
89 for i, test := range signingTests {
90 var buf bytes.Buffer
91
92 plaintext, err := Encode(&buf, keyring[0].PrivateKey, nil)
93 if err != nil {
94 t.Errorf("#%d: error from Encode: %s", i, err)
95 continue
96 }
97 if _, err := plaintext.Write([]byte(test.in)); err != nil {
98 t.Errorf("#%d: error from Write: %s", i, err)
99 continue
100 }
101 if err := plaintext.Close(); err != nil {
102 t.Fatalf("#%d: error from Close: %s", i, err)
103 continue
104 }
105
106 b, _ := Decode(buf.Bytes())
107 if b == nil {
108 t.Errorf("#%d: failed to decode clearsign message", i)
109 continue
110 }
111 if !bytes.Equal(b.Bytes, []byte(test.signed)) {
112 t.Errorf("#%d: bad result, got:%x, want:%x", i, b.Bytes, test.signed)
113 continue
114 }
115 if !bytes.Equal(b.Plaintext, []byte(test.plaintext)) {
116 t.Errorf("#%d: bad result, got:%x, want:%x", i, b.Plaintext, test.plaintext)
117 continue
118 }
119
120 if _, err := openpgp.CheckDetachedSignature(keyring, bytes.NewBuffer(b.Bytes), b.ArmoredSignature.Body); err != nil {
121 t.Errorf("#%d: failed to check signature: %s", i, err)
122 }
123 }
124 }
125
126
127 type quickRand byte
128
129 func (qr *quickRand) Read(p []byte) (int, error) {
130 for i := range p {
131 p[i] = byte(*qr)
132 }
133 *qr++
134 return len(p), nil
135 }
136
137 func TestMultiSign(t *testing.T) {
138 if testing.Short() {
139 t.Skip("skipping long test in -short mode")
140 }
141
142 zero := quickRand(0)
143 config := packet.Config{Rand: &zero}
144
145 for nKeys := 0; nKeys < 4; nKeys++ {
146 nextTest:
147 for nExtra := 0; nExtra < 4; nExtra++ {
148 var signKeys []*packet.PrivateKey
149 var verifyKeys openpgp.EntityList
150
151 desc := fmt.Sprintf("%d keys; %d of which will be used to verify", nKeys+nExtra, nKeys)
152 for i := 0; i < nKeys+nExtra; i++ {
153 e, err := openpgp.NewEntity("name", "comment", "email", &config)
154 if err != nil {
155 t.Errorf("cannot create key: %v", err)
156 continue nextTest
157 }
158 if i < nKeys {
159 verifyKeys = append(verifyKeys, e)
160 }
161 signKeys = append(signKeys, e.PrivateKey)
162 }
163
164 input := []byte("this is random text\r\n4 17")
165 var output bytes.Buffer
166 w, err := EncodeMulti(&output, signKeys, nil)
167 if err != nil {
168 t.Errorf("EncodeMulti (%s) failed: %v", desc, err)
169 }
170 if _, err := w.Write(input); err != nil {
171 t.Errorf("Write(%q) to signer (%s) failed: %v", string(input), desc, err)
172 }
173 if err := w.Close(); err != nil {
174 t.Errorf("Close() of signer (%s) failed: %v", desc, err)
175 }
176
177 block, _ := Decode(output.Bytes())
178 if string(block.Bytes) != string(input) {
179 t.Errorf("Inline data didn't match original; got %q want %q", string(block.Bytes), string(input))
180 }
181 _, err = openpgp.CheckDetachedSignature(verifyKeys, bytes.NewReader(block.Bytes), block.ArmoredSignature.Body)
182 if nKeys == 0 {
183 if err == nil {
184 t.Errorf("verifying inline (%s) succeeded; want failure", desc)
185 }
186 } else {
187 if err != nil {
188 t.Errorf("verifying inline (%s) failed (%v); want success", desc, err)
189 }
190 }
191 }
192 }
193 }
194
195 func TestDecodeMissingCRC(t *testing.T) {
196 block, rest := Decode(clearsignInput3)
197 if block == nil {
198 t.Fatal("failed to decode PGP signature missing a CRC")
199 }
200 if len(rest) > 0 {
201 t.Fatalf("Decode should not have any remaining data left: %s", rest)
202 }
203 if _, err := packet.Read(block.ArmoredSignature.Body); err != nil {
204 t.Error(err)
205 }
206 if _, err := packet.Read(block.ArmoredSignature.Body); err != io.EOF {
207 t.Error(err)
208 }
209 }
210
211 const signatureBlock = `
212 -----BEGIN PGP SIGNATURE-----
213 Version: OpenPrivacy 0.99
214
215 yDgBO22WxBHv7O8X7O/jygAEzol56iUKiXmV+XmpCtmpqQUKiQrFqclFqUDBovzS
216 vBSFjNSiVHsuAA==
217 =njUN
218 -----END PGP SIGNATURE-----
219 `
220
221 var invalidInputs = []string{
222 `
223 -----BEGIN PGP SIGNED MESSAGE-----
224 Hash: SHA256
225
226 (This message was truncated.)
227 `,
228 `
229 -----BEGIN PGP SIGNED MESSAGE-----garbage
230 Hash: SHA256
231
232 _o/
233 ` + signatureBlock,
234 `
235 garbage-----BEGIN PGP SIGNED MESSAGE-----
236 Hash: SHA256
237
238 _o/
239 ` + signatureBlock,
240 `
241 -----BEGIN PGP SIGNED MESSAGE-----
242 Hash: SHA` + "\x0b\x0b" + `256
243
244 _o/
245 ` + signatureBlock,
246 `
247 -----BEGIN PGP SIGNED MESSAGE-----
248 NotHash: SHA256
249
250 _o/
251 ` + signatureBlock,
252 }
253
254 func TestParseInvalid(t *testing.T) {
255 for i, input := range invalidInputs {
256 if b, rest := Decode([]byte(input)); b != nil {
257 t.Errorf("#%d: decoded a bad clearsigned message without any error", i)
258 } else if string(rest) != input {
259 t.Errorf("#%d: did not return all data with a bad message", i)
260 }
261 }
262 }
263
264 var clearsignInput = []byte(`
265 ;lasjlkfdsa
266
267 -----BEGIN PGP SIGNED MESSAGE-----
268 Hash: SHA1
269
270 Hello world
271 line 2
272 -----BEGIN PGP SIGNATURE-----
273 Version: GnuPG v1.4.10 (GNU/Linux)
274
275 iJwEAQECAAYFAk8kMuEACgkQO9o98PRieSpMsAQAhmY/vwmNpflrPgmfWsYhk5O8
276 pjnBUzZwqTDoDeINjZEoPDSpQAHGhjFjgaDx/Gj4fAl0dM4D0wuUEBb6QOrwflog
277 2A2k9kfSOMOtk0IH/H5VuFN1Mie9L/erYXjTQIptv9t9J7NoRBMU0QOOaFU0JaO9
278 MyTpno24AjIAGb+mH1U=
279 =hIJ6
280 -----END PGP SIGNATURE-----
281 trailing`)
282
283 var clearsignInput2 = []byte(`
284 asdlfkjasdlkfjsadf
285
286 -----BEGIN PGP SIGNED MESSAGE-----
287 Hash: SHA256
288
289
290
291 (This message has a couple of blank lines at the start and end.)
292
293
294 -----BEGIN PGP SIGNATURE-----
295 Version: GnuPG v1.4.11 (GNU/Linux)
296
297 iJwEAQEIAAYFAlPpSREACgkQO9o98PRieSpZTAP+M8QUoCt/7Rf3YbXPcdzIL32v
298 pt1I+cMNeopzfLy0u4ioEFi8s5VkwpL1AFmirvgViCwlf82inoRxzZRiW05JQ5LI
299 ESEzeCoy2LIdRCQ2hcrG8pIUPzUO4TqO5D/dMbdHwNH4h5nNmGJUAEG6FpURlPm+
300 qZg6BaTvOxepqOxnhVU=
301 =e+C6
302 -----END PGP SIGNATURE-----
303
304 trailing`)
305
306 var clearsignInput3 = []byte(`-----BEGIN PGP SIGNED MESSAGE-----
307 Hash: SHA256
308
309 Origin: vscode stable
310 Label: vscode stable
311 Suite: stable
312 Codename: stable
313 Date: Mon, 13 Jan 2020 08:41:45 UTC
314 Architectures: amd64
315 Components: main
316 Description: Generated by aptly
317 MD5Sum:
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353
354 -----BEGIN PGP SIGNATURE-----
355 Version: BSN Pgp v1.0.0.0
356
357 iQEcBAEBCAAGBQJeHC1bAAoJEOs+lK2+EinPAg8H/1rrhcgfm1HYL+Vmr9Ns6ton
358 LWQ8r13ADN66UTRa3XsO9V+q1fYowTqpXq6EZt2Gmlby/cpDf7mFPM5IteOXWLl7
359 QcWxPKHcdPIUi+h5F7BkFW65imP9GyX+V5Pxx5X544op7hYKaI0gAQ1oYtWDb3HE
360 4D27fju6icbj8w6E8TePcrDn82UvWAcaI5WSLboyhXCt2DxS3PNGFlyaP58zKJ8F
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362 xHVNFqTEetREY6UcQmuhwOn4HezyigH6XCBVp/Uez1izXiNdwBOet34SSvnkuJ4=
363 -----END PGP SIGNATURE-----`)
364
365 var signingKey = `-----BEGIN PGP PRIVATE KEY BLOCK-----
366 Version: GnuPG v1.4.10 (GNU/Linux)
367
368 lQHYBE2rFNoBBADFwqWQIW/DSqcB4yCQqnAFTJ27qS5AnB46ccAdw3u4Greeu3Bp
369 idpoHdjULy7zSKlwR1EA873dO/k/e11Ml3dlAFUinWeejWaK2ugFP6JjiieSsrKn
370 vWNicdCS4HTWn0X4sjl0ZiAygw6GNhqEQ3cpLeL0g8E9hnYzJKQ0LWJa0QARAQAB
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375 gr5f5+sCAOOe5gt9e0am7AvQWhdbHVfJU0TQJx+m2OiCJAqGTB1nvtBLHdJnfdC9
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380 ut4xcLJoJfIaF5ZS38UplgakHG0FQ+b49i8dMij0aZmDqGxrew1m4kBfjXw9B/v+
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392 AAkFAk2rFNoCGwwACgkQO9o98PRieSo2/QP/WTzr4ioINVsvN1akKuekmEMI3LAp
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395 VrM0m72/jnpKo04=
396 =zNCn
397 -----END PGP PRIVATE KEY BLOCK-----
398 `
399
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