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The documentation for message mode clearly states that EasyPG (which uses GnuPG) is the default and recommended way to use S/MIME with mml-secure: [0] https://www.gnu.org/software/emacs/manual/html_node/message/Using-S_002fMIME.html To ensure that this mode works, we just need to import the secret key in question into gpgsm in addition to the public key. gpgsm should be able pick the right keys+certificates to use based on To/From headers, so we don't have to specify anything manually in the #secure mml tag. The import process from the OpenSSL-preferred form (cert+secretkey) is rather ugly, because gpgsm wants to see a PKCS#12 object when importing secret keys. Note that EasyPG generates the more modern Content-Type: application/pkcs7-signature instead of application/x-pkcs7-signature for the detached signature. We are also obliged to manually set gpgsm's include-certs setting to 1 because gpgsm defaults to send "everything but the root cert". In our weird test case, the certificate we're using is self-signed, so it *is* the root cert, which means that gpgsm doesn't include it by default. Setting it to 1 forces inclusion of the signer's cert, which satisfies openssl's smime subcommand. See https://dev.gnupg.org/T4878 for more details. Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
93 lines
3.2 KiB
Bash
Executable file
93 lines
3.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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test_description='S/MIME signature verification and decryption'
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. $(dirname "$0")/test-lib.sh || exit 1
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test_require_external_prereq openssl
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test_require_external_prereq gpgsm
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cp $NOTMUCH_SRCDIR/test/smime/key+cert.pem test_suite.pem
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FINGERPRINT=$(openssl x509 -fingerprint -in test_suite.pem -noout | sed -e 's/^.*=//' -e s/://g)
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add_gpgsm_home
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test_begin_subtest "emacs delivery of S/MIME signed message"
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test_expect_success \
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'emacs_fcc_message \
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"test signed message 001" \
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"This is a test signed message." \
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"(mml-secure-message-sign \"smime\")"'
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test_begin_subtest "emacs delivery of S/MIME encrypted + signed message"
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# Hard code the MML to avoid several interactive questions
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test_expect_success \
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'emacs_fcc_message \
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"test encrypted message 001" \
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"<#secure method=smime mode=signencrypt>\nThis is a test encrypted message.\n"'
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test_begin_subtest "Signature verification (openssl)"
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notmuch show --format=raw subject:"test signed message 001" |\
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openssl smime -verify -CAfile $NOTMUCH_SRCDIR/test/smime/test.crt 2>OUTPUT
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cat <<EOF > EXPECTED
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Verification successful
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "signature verification (notmuch CLI)"
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output=$(notmuch show --format=json --verify subject:"test signed message 001" \
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| notmuch_json_show_sanitize \
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| sed -e 's|"created": [-1234567890]*|"created": 946728000|g' \
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-e 's|"expires": [-1234567890]*|"expires": 424242424|g' )
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expected='[[[{"id": "XXXXX",
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"match": true,
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"excluded": false,
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"filename": ["YYYYY"],
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"timestamp": 946728000,
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"date_relative": "2000-01-01",
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"tags": ["inbox","signed"],
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"crypto": {"signed": {"status": [{"fingerprint": "'$FINGERPRINT'", "status": "good","userid": "CN=Notmuch Test Suite","expires": 424242424, "created": 946728000}]}},
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"headers": {"Subject": "test signed message 001",
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"From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
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"To": "test_suite@notmuchmail.org",
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"Date": "Sat, 01 Jan 2000 12:00:00 +0000"},
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"body": [{"id": 1,
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"sigstatus": [{"fingerprint": "'$FINGERPRINT'",
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"status": "good",
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"userid": "CN=Notmuch Test Suite",
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"expires": 424242424,
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"created": 946728000}],
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"content-type": "multipart/signed",
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"content": [{"id": 2,
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"content-type": "text/plain",
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"content": "This is a test signed message.\n"},
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{"id": 3,
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"content-disposition": "attachment",
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"content-length": "NONZERO",
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"content-transfer-encoding": "base64",
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"content-type": "application/pkcs7-signature",
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"filename": "smime.p7s"}]}]},
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[]]]]'
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test_expect_equal_json \
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"$output" \
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"$expected"
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test_begin_subtest "Decryption and signature verification (openssl)"
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notmuch show --format=raw subject:"test encrypted message 001" |\
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openssl smime -decrypt -recip test_suite.pem |\
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openssl smime -verify -CAfile $NOTMUCH_SRCDIR/test/smime/test.crt 2>OUTPUT
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cat <<EOF > EXPECTED
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Verification successful
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "Decryption (notmuch CLI)"
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test_subtest_known_broken
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notmuch show --decrypt=true subject:"test encrypted message 001" |\
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grep "^This is a" > OUTPUT
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cat <<EOF > EXPECTED
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This is a test encrypted message.
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_done
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