t/t7510-signed-commit.sh

   1 #!/bin/sh
   2
   3 test_description='signed commit tests'
   4 . ./test-lib.sh
   5 GNUPGHOME_NOT_USED=$GNUPGHOME
   6 . "$TEST_DIRECTORY/lib-gpg.sh"
   7
   8 test_expect_success GPG 'create signed commits' '
   9         test_when_finished "test_unconfig commit.gpgsign" &&
  10
  11         echo 1 >file && git add file &&
  12         test_tick && git commit -S -m initial &&
  13         git tag initial &&
  14         git branch side &&
  15
  16         echo 2 >file && test_tick && git commit -a -S -m second &&
  17         git tag second &&
  18
  19         git checkout side &&
  20         echo 3 >elif && git add elif &&
  21         test_tick && git commit -m "third on side" &&
  22
  23         git checkout master &&
  24         test_tick && git merge -S side &&
  25         git tag merge &&
  26
  27         echo 4 >file && test_tick && git commit -a -m "fourth unsigned" &&
  28         git tag fourth-unsigned &&
  29
  30         test_tick && git commit --amend -S -m "fourth signed" &&
  31         git tag fourth-signed &&
  32
  33         git config commit.gpgsign true &&
  34         echo 5 >file && test_tick && git commit -a -m "fifth signed" &&
  35         git tag fifth-signed &&
  36
  37         git config commit.gpgsign false &&
  38         echo 6 >file && test_tick && git commit -a -m "sixth" &&
  39         git tag sixth-unsigned &&
  40
  41         git config commit.gpgsign true &&
  42         echo 7 >file && test_tick && git commit -a -m "seventh" --no-gpg-sign &&
  43         git tag seventh-unsigned &&
  44
  45         test_tick && git rebase -f HEAD^^ && git tag sixth-signed HEAD^ &&
  46         git tag seventh-signed &&
  47
  48         echo 8 >file && test_tick && git commit -a -m eighth -SB7227189 &&
  49         git tag eighth-signed-alt &&
  50
  51         # commit.gpgsign is still on but this must not be signed
  52         git tag ninth-unsigned $(echo 9 | git commit-tree HEAD^{tree}) &&
  53         # explicit -S of course must sign.
  54         git tag tenth-signed $(echo 9 | git commit-tree -S HEAD^{tree})
  55 '
  56
  57 test_expect_success GPG 'verify and show signatures' '
  58         (
  59                 for commit in initial second merge fourth-signed \
  60                         fifth-signed sixth-signed seventh-signed tenth-signed
  61                 do
  62                         git verify-commit $commit &&
  63                         git show --pretty=short --show-signature $commit >actual &&
  64                         grep "Good signature from" actual &&
  65                         ! grep "BAD signature from" actual &&
  66                         echo $commit OK || exit 1
  67                 done
  68         ) &&
  69         (
  70                 for commit in merge^2 fourth-unsigned sixth-unsigned \
  71                         seventh-unsigned ninth-unsigned
  72                 do
  73                         test_must_fail git verify-commit $commit &&
  74                         git show --pretty=short --show-signature $commit >actual &&
  75                         ! grep "Good signature from" actual &&
  76                         ! grep "BAD signature from" actual &&
  77                         echo $commit OK || exit 1
  78                 done
  79         ) &&
  80         (
  81                 for commit in eighth-signed-alt
  82                 do
  83                         git show --pretty=short --show-signature $commit >actual &&
  84                         grep "Good signature from" actual &&
  85                         ! grep "BAD signature from" actual &&
  86                         grep "not certified" actual &&
  87                         echo $commit OK || exit 1
  88                 done
  89         )
  90 '
  91
  92 test_expect_success GPG 'verify-commit exits success on untrusted signature' '
  93         git verify-commit eighth-signed-alt 2>actual &&
  94         grep "Good signature from" actual &&
  95         ! grep "BAD signature from" actual &&
  96         grep "not certified" actual
  97 '
  98
  99 test_expect_success GPG 'verify signatures with --raw' '
 100         (
 101                 for commit in initial second merge fourth-signed fifth-signed sixth-signed seventh-signed
 102                 do
 103                         git verify-commit --raw $commit 2>actual &&
 104                         grep "GOODSIG" actual &&
 105                         ! grep "BADSIG" actual &&
 106                         echo $commit OK || exit 1
 107                 done
 108         ) &&
 109         (
 110                 for commit in merge^2 fourth-unsigned sixth-unsigned seventh-unsigned
 111                 do
 112                         test_must_fail git verify-commit --raw $commit 2>actual &&
 113                         ! grep "GOODSIG" actual &&
 114                         ! grep "BADSIG" actual &&
 115                         echo $commit OK || exit 1
 116                 done
 117         ) &&
 118         (
 119                 for commit in eighth-signed-alt
 120                 do
 121                         git verify-commit --raw $commit 2>actual &&
 122                         grep "GOODSIG" actual &&
 123                         ! grep "BADSIG" actual &&
 124                         grep "TRUST_UNDEFINED" actual &&
 125                         echo $commit OK || exit 1
 126                 done
 127         )
 128 '
 129
 130 test_expect_success GPG 'show signed commit with signature' '
 131         git show -s initial >commit &&
 132         git show -s --show-signature initial >show &&
 133         git verify-commit -v initial >verify.1 2>verify.2 &&
 134         git cat-file commit initial >cat &&
 135         grep -v -e "gpg: " -e "Warning: " show >show.commit &&
 136         grep -e "gpg: " -e "Warning: " show >show.gpg &&
 137         grep -v "^ " cat | grep -v "^gpgsig " >cat.commit &&
 138         test_cmp show.commit commit &&
 139         test_cmp show.gpg verify.2 &&
 140         test_cmp cat.commit verify.1
 141 '
 142
 143 test_expect_success GPG 'detect fudged signature' '
 144         git cat-file commit seventh-signed >raw &&
 145         sed -e "s/^seventh/7th forged/" raw >forged1 &&
 146         git hash-object -w -t commit forged1 >forged1.commit &&
 147         test_must_fail git verify-commit $(cat forged1.commit) &&
 148         git show --pretty=short --show-signature $(cat forged1.commit) >actual1 &&
 149         grep "BAD signature from" actual1 &&
 150         ! grep "Good signature from" actual1
 151 '
 152
 153 test_expect_success GPG 'detect fudged signature with NUL' '
 154         git cat-file commit seventh-signed >raw &&
 155         cat raw >forged2 &&
 156         echo Qwik | tr "Q" "\000" >>forged2 &&
 157         git hash-object -w -t commit forged2 >forged2.commit &&
 158         test_must_fail git verify-commit $(cat forged2.commit) &&
 159         git show --pretty=short --show-signature $(cat forged2.commit) >actual2 &&
 160         grep "BAD signature from" actual2 &&
 161         ! grep "Good signature from" actual2
 162 '
 163
 164 test_expect_success GPG 'amending already signed commit' '
 165         git checkout fourth-signed^0 &&
 166         git commit --amend -S --no-edit &&
 167         git verify-commit HEAD &&
 168         git show -s --show-signature HEAD >actual &&
 169         grep "Good signature from" actual &&
 170         ! grep "BAD signature from" actual
 171 '
 172
 173 test_expect_success GPG 'show good signature with custom format' '
 174         cat >expect <<-\EOF &&
 175         G
 176         13B6F51ECDDE430D
 177         C O Mitter <committer@example.com>
 178         73D758744BE721698EC54E8713B6F51ECDDE430D
 179         73D758744BE721698EC54E8713B6F51ECDDE430D
 180         EOF
 181         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" sixth-signed >actual &&
 182         test_cmp expect actual
 183 '
 184
 185 test_expect_success GPG 'show bad signature with custom format' '
 186         cat >expect <<-\EOF &&
 187         B
 188         13B6F51ECDDE430D
 189         C O Mitter <committer@example.com>
 190
 191
 192         EOF
 193         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat forged1.commit) >actual &&
 194         test_cmp expect actual
 195 '
 196
 197 test_expect_success GPG 'show untrusted signature with custom format' '
 198         cat >expect <<-\EOF &&
 199         U
 200         65A0EEA02E30CAD7
 201         Eris Discordia <discord@example.net>
 202         F8364A59E07FFE9F4D63005A65A0EEA02E30CAD7
 203         D4BE22311AD3131E5EDA29A461092E85B7227189
 204         EOF
 205         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 206         test_cmp expect actual
 207 '
 208
 209 test_expect_success GPG 'show unknown signature with custom format' '
 210         cat >expect <<-\EOF &&
 211         E
 212         65A0EEA02E30CAD7
 213
 214
 215
 216         EOF
 217         GNUPGHOME="$GNUPGHOME_NOT_USED" git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" eighth-signed-alt >actual &&
 218         test_cmp expect actual
 219 '
 220
 221 test_expect_success GPG 'show lack of signature with custom format' '
 222         cat >expect <<-\EOF &&
 223         N
 224
 225
 226
 227
 228         EOF
 229         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" seventh-unsigned >actual &&
 230         test_cmp expect actual
 231 '
 232
 233 test_expect_success GPG 'log.showsignature behaves like --show-signature' '
 234         test_config log.showsignature true &&
 235         git show initial >actual &&
 236         grep "gpg: Signature made" actual &&
 237         grep "gpg: Good signature" actual
 238 '
 239
 240 test_expect_success GPG 'check config gpg.format values' '
 241         test_config gpg.format openpgp &&
 242         git commit -S --amend -m "success" &&
 243         test_config gpg.format OpEnPgP &&
 244         test_must_fail git commit -S --amend -m "fail"
 245 '
 246
 247 test_expect_success GPG 'detect fudged commit with double signature' '
 248         sed -e "/gpgsig/,/END PGP/d" forged1 >double-base &&
 249         sed -n -e "/gpgsig/,/END PGP/p" forged1 | \
 250                 sed -e "s/^gpgsig//;s/^ //" | gpg --dearmor >double-sig1.sig &&
 251         gpg -o double-sig2.sig -u 29472784 --detach-sign double-base &&
 252         cat double-sig1.sig double-sig2.sig | gpg --enarmor >double-combined.asc &&
 253         sed -e "s/^\(-.*\)ARMORED FILE/\1SIGNATURE/;1s/^/gpgsig /;2,\$s/^/ /" \
 254                 double-combined.asc > double-gpgsig &&
 255         sed -e "/committer/r double-gpgsig" double-base >double-commit &&
 256         git hash-object -w -t commit double-commit >double-commit.commit &&
 257         test_must_fail git verify-commit $(cat double-commit.commit) &&
 258         git show --pretty=short --show-signature $(cat double-commit.commit) >double-actual &&
 259         grep "BAD signature from" double-actual &&
 260         grep "Good signature from" double-actual
 261 '
 262
 263 test_expect_success GPG 'show double signature with custom format' '
 264         cat >expect <<-\EOF &&
 265         E
 266
 267
 268
 269
 270         EOF
 271         git log -1 --format="%G?%n%GK%n%GS%n%GF%n%GP" $(cat double-commit.commit) >actual &&
 272         test_cmp expect actual
 273 '
 274
 275 test_done