t/t7510-signed-commit.sh

   1 #!/bin/sh
   2
   3 test_description='signed commit tests'
   4 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
   5 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
   6
   7 . ./test-lib.sh
   8 GNUPGHOME_NOT_USED=$GNUPGHOME
   9 . "$TEST_DIRECTORY/lib-gpg.sh"
  10
  11 test_expect_success GPG 'create signed commits' '
  12         test_oid_cache <<-\EOF &&
  13         header sha1:gpgsig
  14         header sha256:gpgsig-sha256
  15         EOF
  16
  17         test_when_finished "test_unconfig commit.gpgsign" &&
  18
  19         echo 1 >file && git add file &&
  20         test_tick && git commit -S -m initial &&
  21         git tag initial &&
  22         git branch side &&
  23
  24         echo 2 >file && test_tick && git commit -a -S -m second &&
  25         git tag second &&
  26
  27         git checkout side &&
  28         echo 3 >elif && git add elif &&
  29         test_tick && git commit -m "third on side" &&
  30
  31         git checkout main &&
  32         test_tick && git merge -S side &&
  33         git tag merge &&
  34
  35         echo 4 >file && test_tick && git commit -a -m "fourth unsigned" &&
  36         git tag fourth-unsigned &&
  37
  38         test_tick && git commit --amend -S -m "fourth signed" &&
  39         git tag fourth-signed &&
  40
  41         git config commit.gpgsign true &&
  42         echo 5 >file && test_tick && git commit -a -m "fifth signed" &&
  43         git tag fifth-signed &&
  44
  45         git config commit.gpgsign false &&
  46         echo 6 >file && test_tick && git commit -a -m "sixth" &&
  47         git tag sixth-unsigned &&
  48
  49         git config commit.gpgsign true &&
  50         echo 7 >file && test_tick && git commit -a -m "seventh" --no-gpg-sign &&
  51         git tag seventh-unsigned &&
  52
  53         test_tick && git rebase -f HEAD^^ && git tag sixth-signed HEAD^ &&
  54         git tag seventh-signed &&
  55
  56         echo 8 >file && test_tick && git commit -a -m eighth -SB7227189 &&
  57         git tag eighth-signed-alt &&
  58
  59         # commit.gpgsign is still on but this must not be signed
  60         echo 9 | git commit-tree HEAD^{tree} >oid &&
  61         test_line_count = 1 oid &&
  62         git tag ninth-unsigned $(cat oid) &&
  63         # explicit -S of course must sign.
  64         echo 10 | git commit-tree -S HEAD^{tree} >oid &&
  65         test_line_count = 1 oid &&
  66         git tag tenth-signed $(cat oid) &&
  67
  68         # --gpg-sign[=<key-id>] must sign.
  69         echo 11 | git commit-tree --gpg-sign HEAD^{tree} >oid &&
  70         test_line_count = 1 oid &&
  71         git tag eleventh-signed $(cat oid) &&
  72         echo 12 | git commit-tree --gpg-sign=B7227189 HEAD^{tree} >oid &&
  73         test_line_count = 1 oid &&
  74         git tag twelfth-signed-alt $(cat oid) &&
  75
  76         cat >keydetails <<-\EOF &&
  77         Key-Type: RSA
  78         Key-Length: 2048
  79         Subkey-Type: RSA
  80         Subkey-Length: 2048
  81         Name-Real: Unknown User
  82         Name-Email: unknown@git.com
  83         Expire-Date: 0
  84         %no-ask-passphrase
  85         %no-protection
  86         EOF
  87         gpg --batch --gen-key keydetails &&
  88         echo 13 >file && git commit -a -S"unknown@git.com" -m thirteenth &&
  89         git tag thirteenth-signed &&
  90         DELETE_FINGERPRINT=$(gpg -K --with-colons --fingerprint --batch unknown@git.com | grep "^fpr" | head -n 1 | awk -F ":" "{print \$10;}") &&
  91         gpg --batch --yes --delete-secret-keys $DELETE_FINGERPRINT &&
  92         gpg --batch --yes --delete-keys unknown@git.com
  93 '
  94
  95 test_expect_success GPG 'verify and show signatures' '
  96         (
  97                 for commit in initial second merge fourth-signed \
  98                         fifth-signed sixth-signed seventh-signed tenth-signed \
  99                         eleventh-signed
 100                 do
 101                         git verify-commit $commit &&
 102                         git show --pretty=short --show-signature $commit >actual &&
 103                         grep "Good signature from" actual &&
 104                         ! grep "BAD signature from" actual &&
 105                         echo $commit OK || exit 1
 106                 done
 107         ) &&
 108         (
 109                 for commit in merge^2 fourth-unsigned sixth-unsigned \
 110                         seventh-unsigned ninth-unsigned
 111                 do
 112                         test_must_fail git verify-commit $commit &&
 113                         git show --pretty=short --show-signature $commit >actual &&
 114                         ! grep "Good signature from" actual &&
 115                         ! grep "BAD signature from" actual &&
 116                         echo $commit OK || exit 1
 117                 done
 118         ) &&
 119         (
 120                 for commit in eighth-signed-alt twelfth-signed-alt
 121                 do
 122                         git show --pretty=short --show-signature $commit >actual &&
 123                         grep "Good signature from" actual &&
 124                         ! grep "BAD signature from" actual &&
 125                         grep "not certified" actual &&
 126                         echo $commit OK || exit 1
 127                 done
 128         )
 129 '
 130
 131 test_expect_success GPG 'verify-commit exits failure on unknown signature' '
 132         test_must_fail git verify-commit thirteenth-signed 2>actual &&
 133         ! grep "Good signature from" actual &&
 134         ! grep "BAD signature from" actual &&
 135         grep -q -F -e "No public key" -e "public key not found" actual
 136 '
 137
 138 test_expect_success GPG 'verify-commit exits success on untrusted signature' '
 139         git verify-commit eighth-signed-alt 2>actual &&
 140         grep "Good signature from" actual &&
 141         ! grep "BAD signature from" actual &&
 142         grep "not certified" actual
 143 '
 144
 145 test_expect_success GPG 'verify-commit exits success with matching minTrustLevel' '
 146         test_config gpg.minTrustLevel ultimate &&
 147         git verify-commit sixth-signed
 148 '
 149
 150 test_expect_success GPG 'verify-commit exits success with low minTrustLevel' '
 151         test_config gpg.minTrustLevel fully &&
 152         git verify-commit sixth-signed
 153 '
 154
 155 test_expect_success GPG 'verify-commit exits failure with high minTrustLevel' '
 156         test_config gpg.minTrustLevel ultimate &&
 157         test_must_fail git verify-commit eighth-signed-alt
 158 '
 159
 160 test_expect_success GPG 'verify signatures with --raw' '
 161         (
 162                 for commit in initial second merge fourth-signed fifth-signed sixth-signed seventh-signed
 163                 do
 164                         git verify-commit --raw $commit 2>actual &&
 165                         grep "GOODSIG" actual &&
 166                         ! grep "BADSIG" actual &&
 167                         echo $commit OK || exit 1
 168                 done
 169         ) &&
 170         (
 171                 for commit in merge^2 fourth-unsigned sixth-unsigned seventh-unsigned
 172                 do
 173                         test_must_fail git verify-commit --raw $commit 2>actual &&
 174                         ! grep "GOODSIG" actual &&
 175                         ! grep "BADSIG" actual &&
 176                         echo $commit OK || exit 1
 177                 done
 178         ) &&
 179         (
 180                 for commit in eighth-signed-alt
 181                 do
 182                         git verify-commit --raw $commit 2>actual &&
 183                         grep "GOODSIG" actual &&
 184                         ! grep "BADSIG" actual &&
 185                         grep "TRUST_UNDEFINED" actual &&
 186                         echo $commit OK || exit 1
 187                 done
 188         )
 189 '
 190
 191 test_expect_success GPG 'proper header is used for hash algorithm' '
 192         git cat-file commit fourth-signed >output &&
 193         grep "^$(test_oid header) -----BEGIN PGP SIGNATURE-----" output
 194 '
 195
 196 test_expect_success GPG 'show signed commit with signature' '
 197         git show -s initial >commit &&
 198         git show -s --show-signature initial >show &&
 199         git verify-commit -v initial >verify.1 2>verify.2 &&
 200         git cat-file commit initial >cat &&
 201         grep -v -e "gpg: " -e "Warning: " show >show.commit &&
 202         grep -e "gpg: " -e "Warning: " show >show.gpg &&
 203         grep -v "^ " cat | grep -v "^gpgsig.* " >cat.commit &&
 204         test_cmp show.commit commit &&
 205         test_cmp show.gpg verify.2 &&
 206         test_cmp cat.commit verify.1
 207 '
 208
 209 test_expect_success GPG 'detect fudged signature' '
 210         git cat-file commit seventh-signed >raw &&
 211         sed -e "s/^seventh/7th forged/" raw >forged1 &&
 212         git hash-object -w -t commit forged1 >forged1.commit &&
 213         test_must_fail git verify-commit $(cat forged1.commit) &&
 214         git show --pretty=short --show-signature $(cat forged1.commit) >actual1 &&
 215         grep "BAD signature from" actual1 &&
 216         ! grep "Good signature from" actual1
 217 '
 218
 219 test_expect_success GPG 'detect fudged signature with NUL' '
 220         git cat-file commit seventh-signed >raw &&
 221         cat raw >forged2 &&
 222         echo Qwik | tr "Q" "\000" >>forged2 &&
 223         git hash-object -w -t commit forged2 >forged2.commit &&
 224         test_must_fail git verify-commit $(cat forged2.commit) &&
 225         git show --pretty=short --show-signature $(cat forged2.commit) >actual2 &&
 226         grep "BAD signature from" actual2 &&
 227         ! grep "Good signature from" actual2
 228 '
 229
 230 test_expect_success GPG 'amending already signed commit' '
 231         git checkout fourth-signed^0 &&
 232         git commit --amend -S --no-edit &&
 233         git verify-commit HEAD &&
 234         git show -s --show-signature HEAD >actual &&
 235         grep "Good signature from" actual &&
 236         ! grep "BAD signature from" actual
 237 '
 238
 239 test_expect_success GPG 'show good signature with custom format' '
 240         cat >expect <<-\EOF &&
 241         G
 242         13B6F51ECDDE430D
 243         C O Mitter <committer@example.com>
 244         73D758744BE721698EC54E8713B6F51ECDDE430D
 245         73D758744BE721698EC54E8713B6F51ECDDE430D
 246         EOF
 247         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
 248         test_cmp expect actual
 249 '
 250
 251 test_expect_success GPG 'show bad signature with custom format' '
 252         cat >expect <<-\EOF &&
 253         B
 254         13B6F51ECDDE430D
 255         C O Mitter <committer@example.com>
 256
 257
 258         EOF
 259         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat forged1.commit) >actual &&
 260         test_cmp expect actual
 261 '
 262
 263 test_expect_success GPG 'show untrusted signature with custom format' '
 264         cat >expect <<-\EOF &&
 265         U
 266         65A0EEA02E30CAD7
 267         Eris Discordia <discord@example.net>
 268         F8364A59E07FFE9F4D63005A65A0EEA02E30CAD7
 269         D4BE22311AD3131E5EDA29A461092E85B7227189
 270         EOF
 271         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 272         test_cmp expect actual
 273 '
 274
 275 test_expect_success GPG 'show untrusted signature with undefined trust level' '
 276         cat >expect <<-\EOF &&
 277         undefined
 278         65A0EEA02E30CAD7
 279         Eris Discordia <discord@example.net>
 280         F8364A59E07FFE9F4D63005A65A0EEA02E30CAD7
 281         D4BE22311AD3131E5EDA29A461092E85B7227189
 282         EOF
 283         git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 284         test_cmp expect actual
 285 '
 286
 287 test_expect_success GPG 'show untrusted signature with ultimate trust level' '
 288         cat >expect <<-\EOF &&
 289         ultimate
 290         13B6F51ECDDE430D
 291         C O Mitter <committer@example.com>
 292         73D758744BE721698EC54E8713B6F51ECDDE430D
 293         73D758744BE721698EC54E8713B6F51ECDDE430D
 294         EOF
 295         git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
 296         test_cmp expect actual
 297 '
 298
 299 test_expect_success GPG 'show unknown signature with custom format' '
 300         cat >expect <<-\EOF &&
 301         E
 302         65A0EEA02E30CAD7
 303
 304
 305
 306         EOF
 307         GNUPGHOME="$GNUPGHOME_NOT_USED" git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 308         test_cmp expect actual
 309 '
 310
 311 test_expect_success GPG 'show lack of signature with custom format' '
 312         cat >expect <<-\EOF &&
 313         N
 314
 315
 316
 317
 318         EOF
 319         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" seventh-unsigned >actual &&
 320         test_cmp expect actual
 321 '
 322
 323 test_expect_success GPG 'log.showsignature behaves like --show-signature' '
 324         test_config log.showsignature true &&
 325         git show initial >actual &&
 326         grep "gpg: Signature made" actual &&
 327         grep "gpg: Good signature" actual
 328 '
 329
 330 test_expect_success GPG 'check config gpg.format values' '
 331         test_config gpg.format openpgp &&
 332         git commit -S --amend -m "success" &&
 333         test_config gpg.format OpEnPgP &&
 334         test_must_fail git commit -S --amend -m "fail"
 335 '
 336
 337 test_expect_success GPG 'detect fudged commit with double signature' '
 338         sed -e "/gpgsig/,/END PGP/d" forged1 >double-base &&
 339         sed -n -e "/gpgsig/,/END PGP/p" forged1 | \
 340                 sed -e "s/^$(test_oid header)//;s/^ //" | gpg --dearmor >double-sig1.sig &&
 341         gpg -o double-sig2.sig -u 29472784 --detach-sign double-base &&
 342         cat double-sig1.sig double-sig2.sig | gpg --enarmor >double-combined.asc &&
 343         sed -e "s/^\(-.*\)ARMORED FILE/\1SIGNATURE/;1s/^/$(test_oid header) /;2,\$s/^/ /" \
 344                 double-combined.asc > double-gpgsig &&
 345         sed -e "/committer/r double-gpgsig" double-base >double-commit &&
 346         git hash-object -w -t commit double-commit >double-commit.commit &&
 347         test_must_fail git verify-commit $(cat double-commit.commit) &&
 348         git show --pretty=short --show-signature $(cat double-commit.commit) >double-actual &&
 349         grep "BAD signature from" double-actual &&
 350         grep "Good signature from" double-actual
 351 '
 352
 353 test_expect_success GPG 'show double signature with custom format' '
 354         cat >expect <<-\EOF &&
 355         E
 356
 357
 358
 359
 360         EOF
 361         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat double-commit.commit) >actual &&
 362         test_cmp expect actual
 363 '
 364
 365
 366 # NEEDSWORK: This test relies on the test_tick commit/author dates from the first
 367 # 'create signed commits' test even though it creates its own
 368 test_expect_success GPG 'verify-commit verifies multiply signed commits' '
 369         git init multiply-signed &&
 370         cd multiply-signed &&
 371         test_commit first &&
 372         echo 1 >second &&
 373         git add second &&
 374         tree=$(git write-tree) &&
 375         parent=$(git rev-parse HEAD^{commit}) &&
 376         git commit --gpg-sign -m second &&
 377         git cat-file commit HEAD &&
 378         # Avoid trailing whitespace.
 379         sed -e "s/^Q//" -e "s/^Z/ /" >commit <<-EOF &&
 380         Qtree $tree
 381         Qparent $parent
 382         Qauthor A U Thor <author@example.com> 1112912653 -0700
 383         Qcommitter C O Mitter <committer@example.com> 1112912653 -0700
 384         Qgpgsig -----BEGIN PGP SIGNATURE-----
 385         QZ
 386         Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBDRYcY29tbWl0dGVy
 387         Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMNd+8AoK1I8mhLHviPH+q2I5fIVgPsEtYC
 388         Q AKCTqBh+VabJceXcGIZuF0Ry+udbBQ==
 389         Q =tQ0N
 390         Q -----END PGP SIGNATURE-----
 391         Qgpgsig-sha256 -----BEGIN PGP SIGNATURE-----
 392         QZ
 393         Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBIBYcY29tbWl0dGVy
 394         Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMN/NEAn0XO9RYSBj2dFyozi0JKSbssYMtO
 395         Q AJwKCQ1BQOtuwz//IjU8TiS+6S4iUw==
 396         Q =pIwP
 397         Q -----END PGP SIGNATURE-----
 398         Q
 399         Qsecond
 400         EOF
 401         head=$(git hash-object -t commit -w commit) &&
 402         git reset --hard $head &&
 403         git verify-commit $head 2>actual &&
 404         grep "Good signature from" actual &&
 405         ! grep "BAD signature from" actual
 406 '
 407
 408 test_done