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
  77 test_expect_success GPG 'verify and show signatures' '
  78         (
  79                 for commit in initial second merge fourth-signed \
  80                         fifth-signed sixth-signed seventh-signed tenth-signed \
  81                         eleventh-signed
  82                 do
  83                         git verify-commit $commit &&
  84                         git show --pretty=short --show-signature $commit >actual &&
  85                         grep "Good signature from" actual &&
  86                         ! grep "BAD signature from" actual &&
  87                         echo $commit OK || exit 1
  88                 done
  89         ) &&
  90         (
  91                 for commit in merge^2 fourth-unsigned sixth-unsigned \
  92                         seventh-unsigned ninth-unsigned
  93                 do
  94                         test_must_fail git verify-commit $commit &&
  95                         git show --pretty=short --show-signature $commit >actual &&
  96                         ! grep "Good signature from" actual &&
  97                         ! grep "BAD signature from" actual &&
  98                         echo $commit OK || exit 1
  99                 done
 100         ) &&
 101         (
 102                 for commit in eighth-signed-alt twelfth-signed-alt
 103                 do
 104                         git show --pretty=short --show-signature $commit >actual &&
 105                         grep "Good signature from" actual &&
 106                         ! grep "BAD signature from" actual &&
 107                         grep "not certified" actual &&
 108                         echo $commit OK || exit 1
 109                 done
 110         )
 111 '
 112
 113 test_expect_success GPG 'verify-commit exits success on untrusted signature' '
 114         git verify-commit eighth-signed-alt 2>actual &&
 115         grep "Good signature from" actual &&
 116         ! grep "BAD signature from" actual &&
 117         grep "not certified" actual
 118 '
 119
 120 test_expect_success GPG 'verify-commit exits success with matching minTrustLevel' '
 121         test_config gpg.minTrustLevel ultimate &&
 122         git verify-commit sixth-signed
 123 '
 124
 125 test_expect_success GPG 'verify-commit exits success with low minTrustLevel' '
 126         test_config gpg.minTrustLevel fully &&
 127         git verify-commit sixth-signed
 128 '
 129
 130 test_expect_success GPG 'verify-commit exits failure with high minTrustLevel' '
 131         test_config gpg.minTrustLevel ultimate &&
 132         test_must_fail git verify-commit eighth-signed-alt
 133 '
 134
 135 test_expect_success GPG 'verify signatures with --raw' '
 136         (
 137                 for commit in initial second merge fourth-signed fifth-signed sixth-signed seventh-signed
 138                 do
 139                         git verify-commit --raw $commit 2>actual &&
 140                         grep "GOODSIG" actual &&
 141                         ! grep "BADSIG" actual &&
 142                         echo $commit OK || exit 1
 143                 done
 144         ) &&
 145         (
 146                 for commit in merge^2 fourth-unsigned sixth-unsigned seventh-unsigned
 147                 do
 148                         test_must_fail git verify-commit --raw $commit 2>actual &&
 149                         ! grep "GOODSIG" actual &&
 150                         ! grep "BADSIG" actual &&
 151                         echo $commit OK || exit 1
 152                 done
 153         ) &&
 154         (
 155                 for commit in eighth-signed-alt
 156                 do
 157                         git verify-commit --raw $commit 2>actual &&
 158                         grep "GOODSIG" actual &&
 159                         ! grep "BADSIG" actual &&
 160                         grep "TRUST_UNDEFINED" actual &&
 161                         echo $commit OK || exit 1
 162                 done
 163         )
 164 '
 165
 166 test_expect_success GPG 'proper header is used for hash algorithm' '
 167         git cat-file commit fourth-signed >output &&
 168         grep "^$(test_oid header) -----BEGIN PGP SIGNATURE-----" output
 169 '
 170
 171 test_expect_success GPG 'show signed commit with signature' '
 172         git show -s initial >commit &&
 173         git show -s --show-signature initial >show &&
 174         git verify-commit -v initial >verify.1 2>verify.2 &&
 175         git cat-file commit initial >cat &&
 176         grep -v -e "gpg: " -e "Warning: " show >show.commit &&
 177         grep -e "gpg: " -e "Warning: " show >show.gpg &&
 178         grep -v "^ " cat | grep -v "^gpgsig.* " >cat.commit &&
 179         test_cmp show.commit commit &&
 180         test_cmp show.gpg verify.2 &&
 181         test_cmp cat.commit verify.1
 182 '
 183
 184 test_expect_success GPG 'detect fudged signature' '
 185         git cat-file commit seventh-signed >raw &&
 186         sed -e "s/^seventh/7th forged/" raw >forged1 &&
 187         git hash-object -w -t commit forged1 >forged1.commit &&
 188         test_must_fail git verify-commit $(cat forged1.commit) &&
 189         git show --pretty=short --show-signature $(cat forged1.commit) >actual1 &&
 190         grep "BAD signature from" actual1 &&
 191         ! grep "Good signature from" actual1
 192 '
 193
 194 test_expect_success GPG 'detect fudged signature with NUL' '
 195         git cat-file commit seventh-signed >raw &&
 196         cat raw >forged2 &&
 197         echo Qwik | tr "Q" "\000" >>forged2 &&
 198         git hash-object -w -t commit forged2 >forged2.commit &&
 199         test_must_fail git verify-commit $(cat forged2.commit) &&
 200         git show --pretty=short --show-signature $(cat forged2.commit) >actual2 &&
 201         grep "BAD signature from" actual2 &&
 202         ! grep "Good signature from" actual2
 203 '
 204
 205 test_expect_success GPG 'amending already signed commit' '
 206         git checkout fourth-signed^0 &&
 207         git commit --amend -S --no-edit &&
 208         git verify-commit HEAD &&
 209         git show -s --show-signature HEAD >actual &&
 210         grep "Good signature from" actual &&
 211         ! grep "BAD signature from" actual
 212 '
 213
 214 test_expect_success GPG 'show good signature with custom format' '
 215         cat >expect <<-\EOF &&
 216         G
 217         13B6F51ECDDE430D
 218         C O Mitter <committer@example.com>
 219         73D758744BE721698EC54E8713B6F51ECDDE430D
 220         73D758744BE721698EC54E8713B6F51ECDDE430D
 221         EOF
 222         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
 223         test_cmp expect actual
 224 '
 225
 226 test_expect_success GPG 'show bad signature with custom format' '
 227         cat >expect <<-\EOF &&
 228         B
 229         13B6F51ECDDE430D
 230         C O Mitter <committer@example.com>
 231
 232
 233         EOF
 234         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat forged1.commit) >actual &&
 235         test_cmp expect actual
 236 '
 237
 238 test_expect_success GPG 'show untrusted signature with custom format' '
 239         cat >expect <<-\EOF &&
 240         U
 241         65A0EEA02E30CAD7
 242         Eris Discordia <discord@example.net>
 243         F8364A59E07FFE9F4D63005A65A0EEA02E30CAD7
 244         D4BE22311AD3131E5EDA29A461092E85B7227189
 245         EOF
 246         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 247         test_cmp expect actual
 248 '
 249
 250 test_expect_success GPG 'show untrusted signature with undefined trust level' '
 251         cat >expect <<-\EOF &&
 252         undefined
 253         65A0EEA02E30CAD7
 254         Eris Discordia <discord@example.net>
 255         F8364A59E07FFE9F4D63005A65A0EEA02E30CAD7
 256         D4BE22311AD3131E5EDA29A461092E85B7227189
 257         EOF
 258         git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 259         test_cmp expect actual
 260 '
 261
 262 test_expect_success GPG 'show untrusted signature with ultimate trust level' '
 263         cat >expect <<-\EOF &&
 264         ultimate
 265         13B6F51ECDDE430D
 266         C O Mitter <committer@example.com>
 267         73D758744BE721698EC54E8713B6F51ECDDE430D
 268         73D758744BE721698EC54E8713B6F51ECDDE430D
 269         EOF
 270         git log -1 --format="%GT%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
 271         test_cmp expect actual
 272 '
 273
 274 test_expect_success GPG 'show unknown signature with custom format' '
 275         cat >expect <<-\EOF &&
 276         E
 277         65A0EEA02E30CAD7
 278
 279
 280
 281         EOF
 282         GNUPGHOME="$GNUPGHOME_NOT_USED" git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 283         test_cmp expect actual
 284 '
 285
 286 test_expect_success GPG 'show lack of signature with custom format' '
 287         cat >expect <<-\EOF &&
 288         N
 289
 290
 291
 292
 293         EOF
 294         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" seventh-unsigned >actual &&
 295         test_cmp expect actual
 296 '
 297
 298 test_expect_success GPG 'log.showsignature behaves like --show-signature' '
 299         test_config log.showsignature true &&
 300         git show initial >actual &&
 301         grep "gpg: Signature made" actual &&
 302         grep "gpg: Good signature" actual
 303 '
 304
 305 test_expect_success GPG 'check config gpg.format values' '
 306         test_config gpg.format openpgp &&
 307         git commit -S --amend -m "success" &&
 308         test_config gpg.format OpEnPgP &&
 309         test_must_fail git commit -S --amend -m "fail"
 310 '
 311
 312 test_expect_success GPG 'detect fudged commit with double signature' '
 313         sed -e "/gpgsig/,/END PGP/d" forged1 >double-base &&
 314         sed -n -e "/gpgsig/,/END PGP/p" forged1 | \
 315                 sed -e "s/^$(test_oid header)//;s/^ //" | gpg --dearmor >double-sig1.sig &&
 316         gpg -o double-sig2.sig -u 29472784 --detach-sign double-base &&
 317         cat double-sig1.sig double-sig2.sig | gpg --enarmor >double-combined.asc &&
 318         sed -e "s/^\(-.*\)ARMORED FILE/\1SIGNATURE/;1s/^/$(test_oid header) /;2,\$s/^/ /" \
 319                 double-combined.asc > double-gpgsig &&
 320         sed -e "/committer/r double-gpgsig" double-base >double-commit &&
 321         git hash-object -w -t commit double-commit >double-commit.commit &&
 322         test_must_fail git verify-commit $(cat double-commit.commit) &&
 323         git show --pretty=short --show-signature $(cat double-commit.commit) >double-actual &&
 324         grep "BAD signature from" double-actual &&
 325         grep "Good signature from" double-actual
 326 '
 327
 328 test_expect_success GPG 'show double signature with custom format' '
 329         cat >expect <<-\EOF &&
 330         E
 331
 332
 333
 334
 335         EOF
 336         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat double-commit.commit) >actual &&
 337         test_cmp expect actual
 338 '
 339
 340
 341 test_expect_success GPG 'verify-commit verifies multiply signed commits' '
 342         git init multiply-signed &&
 343         cd multiply-signed &&
 344         test_commit first &&
 345         echo 1 >second &&
 346         git add second &&
 347         tree=$(git write-tree) &&
 348         parent=$(git rev-parse HEAD^{commit}) &&
 349         git commit --gpg-sign -m second &&
 350         git cat-file commit HEAD &&
 351         # Avoid trailing whitespace.
 352         sed -e "s/^Q//" -e "s/^Z/ /" >commit <<-EOF &&
 353         Qtree $tree
 354         Qparent $parent
 355         Qauthor A U Thor <author@example.com> 1112912653 -0700
 356         Qcommitter C O Mitter <committer@example.com> 1112912653 -0700
 357         Qgpgsig -----BEGIN PGP SIGNATURE-----
 358         QZ
 359         Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBDRYcY29tbWl0dGVy
 360         Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMNd+8AoK1I8mhLHviPH+q2I5fIVgPsEtYC
 361         Q AKCTqBh+VabJceXcGIZuF0Ry+udbBQ==
 362         Q =tQ0N
 363         Q -----END PGP SIGNATURE-----
 364         Qgpgsig-sha256 -----BEGIN PGP SIGNATURE-----
 365         QZ
 366         Q iHQEABECADQWIQRz11h0S+chaY7FTocTtvUezd5DDQUCX/uBIBYcY29tbWl0dGVy
 367         Q QGV4YW1wbGUuY29tAAoJEBO29R7N3kMN/NEAn0XO9RYSBj2dFyozi0JKSbssYMtO
 368         Q AJwKCQ1BQOtuwz//IjU8TiS+6S4iUw==
 369         Q =pIwP
 370         Q -----END PGP SIGNATURE-----
 371         Q
 372         Qsecond
 373         EOF
 374         head=$(git hash-object -t commit -w commit) &&
 375         git reset --hard $head &&
 376         git verify-commit $head 2>actual &&
 377         grep "Good signature from" actual &&
 378         ! grep "BAD signature from" actual
 379 '
 380
 381 test_done