t/t7510-signed-commit.sh

   1 #!/bin/sh
   2
   3 test_description='signed commit tests'
   4 . ./test-lib.sh
   5 . "$TEST_DIRECTORY/lib-gpg.sh"
   6
   7 test_expect_success GPG 'create signed commits' '
   8         test_when_finished "test_unconfig commit.gpgsign" &&
   9
  10         echo 1 >file && git add file &&
  11         test_tick && git commit -S -m initial &&
  12         git tag initial &&
  13         git branch side &&
  14
  15         echo 2 >file && test_tick && git commit -a -S -m second &&
  16         git tag second &&
  17
  18         git checkout side &&
  19         echo 3 >elif && git add elif &&
  20         test_tick && git commit -m "third on side" &&
  21
  22         git checkout master &&
  23         test_tick && git merge -S side &&
  24         git tag merge &&
  25
  26         echo 4 >file && test_tick && git commit -a -m "fourth unsigned" &&
  27         git tag fourth-unsigned &&
  28
  29         test_tick && git commit --amend -S -m "fourth signed" &&
  30         git tag fourth-signed &&
  31
  32         git config commit.gpgsign true &&
  33         echo 5 >file && test_tick && git commit -a -m "fifth signed" &&
  34         git tag fifth-signed &&
  35
  36         git config commit.gpgsign false &&
  37         echo 6 >file && test_tick && git commit -a -m "sixth" &&
  38         git tag sixth-unsigned &&
  39
  40         git config commit.gpgsign true &&
  41         echo 7 >file && test_tick && git commit -a -m "seventh" --no-gpg-sign &&
  42         git tag seventh-unsigned &&
  43
  44         test_tick && git rebase -f HEAD^^ && git tag sixth-signed HEAD^ &&
  45         git tag seventh-signed &&
  46
  47         echo 8 >file && test_tick && git commit -a -m eighth -SB7227189 &&
  48         git tag eighth-signed-alt &&
  49
  50         # commit.gpgsign is still on but this must not be signed
  51         git tag ninth-unsigned $(echo 9 | git commit-tree HEAD^{tree}) &&
  52         # explicit -S of course must sign.
  53         git tag tenth-signed $(echo 9 | git commit-tree -S HEAD^{tree})
  54 '
  55
  56 test_expect_success GPG 'verify and show signatures' '
  57         (
  58                 for commit in initial second merge fourth-signed \
  59                         fifth-signed sixth-signed seventh-signed tenth-signed
  60                 do
  61                         git verify-commit $commit &&
  62                         git show --pretty=short --show-signature $commit >actual &&
  63                         grep "Good signature from" actual &&
  64                         ! grep "BAD signature from" actual &&
  65                         echo $commit OK || exit 1
  66                 done
  67         ) &&
  68         (
  69                 for commit in merge^2 fourth-unsigned sixth-unsigned \
  70                         seventh-unsigned ninth-unsigned
  71                 do
  72                         test_must_fail git verify-commit $commit &&
  73                         git show --pretty=short --show-signature $commit >actual &&
  74                         ! grep "Good signature from" actual &&
  75                         ! grep "BAD signature from" actual &&
  76                         echo $commit OK || exit 1
  77                 done
  78         ) &&
  79         (
  80                 for commit in eighth-signed-alt
  81                 do
  82                         git show --pretty=short --show-signature $commit >actual &&
  83                         grep "Good signature from" actual &&
  84                         ! grep "BAD signature from" actual &&
  85                         grep "not certified" actual &&
  86                         echo $commit OK || exit 1
  87                 done
  88         )
  89 '
  90
  91 test_expect_success GPG 'verify-commit exits success on untrusted signature' '
  92         git verify-commit eighth-signed-alt 2>actual &&
  93         grep "Good signature from" actual &&
  94         ! grep "BAD signature from" actual &&
  95         grep "not certified" actual
  96 '
  97
  98 test_expect_success GPG 'verify signatures with --raw' '
  99         (
 100                 for commit in initial second merge fourth-signed fifth-signed sixth-signed seventh-signed
 101                 do
 102                         git verify-commit --raw $commit 2>actual &&
 103                         grep "GOODSIG" actual &&
 104                         ! grep "BADSIG" actual &&
 105                         echo $commit OK || exit 1
 106                 done
 107         ) &&
 108         (
 109                 for commit in merge^2 fourth-unsigned sixth-unsigned seventh-unsigned
 110                 do
 111                         test_must_fail git verify-commit --raw $commit 2>actual &&
 112                         ! grep "GOODSIG" actual &&
 113                         ! grep "BADSIG" actual &&
 114                         echo $commit OK || exit 1
 115                 done
 116         ) &&
 117         (
 118                 for commit in eighth-signed-alt
 119                 do
 120                         git verify-commit --raw $commit 2>actual &&
 121                         grep "GOODSIG" actual &&
 122                         ! grep "BADSIG" actual &&
 123                         grep "TRUST_UNDEFINED" actual &&
 124                         echo $commit OK || exit 1
 125                 done
 126         )
 127 '
 128
 129 test_expect_success GPG 'show signed commit with signature' '
 130         git show -s initial >commit &&
 131         git show -s --show-signature initial >show &&
 132         git verify-commit -v initial >verify.1 2>verify.2 &&
 133         git cat-file commit initial >cat &&
 134         grep -v -e "gpg: " -e "Warning: " show >show.commit &&
 135         grep -e "gpg: " -e "Warning: " show >show.gpg &&
 136         grep -v "^ " cat | grep -v "^gpgsig " >cat.commit &&
 137         test_cmp show.commit commit &&
 138         test_cmp show.gpg verify.2 &&
 139         test_cmp cat.commit verify.1
 140 '
 141
 142 test_expect_success GPG 'detect fudged signature' '
 143         git cat-file commit seventh-signed >raw &&
 144
 145         sed -e "s/seventh/7th forged/" raw >forged1 &&
 146         git hash-object -w -t commit forged1 >forged1.commit &&
 147         ! 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         ! 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         EOF
 179         git log -1 --format="%G?%n%GK%n%GS" sixth-signed >actual &&
 180         test_cmp expect actual
 181 '
 182
 183 test_expect_success GPG 'show bad signature with custom format' '
 184         cat >expect <<-\EOF &&
 185         B
 186         13B6F51ECDDE430D
 187         C O Mitter <committer@example.com>
 188         EOF
 189         git log -1 --format="%G?%n%GK%n%GS" $(cat forged1.commit) >actual &&
 190         test_cmp expect actual
 191 '
 192
 193 test_expect_success GPG 'show unknown signature with custom format' '
 194         cat >expect <<-\EOF &&
 195         U
 196         61092E85B7227189
 197         Eris Discordia <discord@example.net>
 198         EOF
 199         git log -1 --format="%G?%n%GK%n%GS" eighth-signed-alt >actual &&
 200         test_cmp expect actual
 201 '
 202
 203 test_expect_success GPG 'show lack of signature with custom format' '
 204         cat >expect <<-\EOF &&
 205         N
 206
 207
 208         EOF
 209         git log -1 --format="%G?%n%GK%n%GS" seventh-unsigned >actual &&
 210         test_cmp expect actual
 211 '
 212
 213 test_done