support/testing/tests/package/test_libgpgme.py: new runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1742,6 +1742,7 @@ F:	support/testing/tests/package/test_kexec/
 F:	support/testing/tests/package/test_kmscube.py
 F:	support/testing/tests/package/test_kmscube/
 F:	support/testing/tests/package/test_less.py
+F:	support/testing/tests/package/test_libgpgme.py
 F:	support/testing/tests/package/test_libjxl.py
 F:	support/testing/tests/package/test_lrzip.py
 F:	support/testing/tests/package/test_lzip.py

support/testing/tests/package/test_libgpgme.py

@@ -0,0 +1,88 @@
+import os
+
+import infra.basetest
+
+
+class TestLibGpgme(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_PACKAGE_LIBGPGME=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
+        self.emulator.boot(arch="armv5",
+                           kernel="builtin",
+                           options=["-initrd", cpio_file])
+        self.emulator.login()
+
+        # We check the binary program can execute.
+        self.assertRunOk("gpgme-tool --version")
+
+        # Some common data for all the tests.
+        plain_data = "Hello Buildroot!"
+        gpg_userid = "br-test@buildroot"
+        plain_file = "reference-plain.txt"
+        enc_file = "encrypted.dat"
+        dec_file = "decrypted.txt"
+
+        # We did not create a gpg key yet. We should not be able to
+        # list our key.
+        gpgme_listkey = f"echo LISTKEYS | gpgme-tool | grep '{gpg_userid}'"
+        _, exit_code = self.emulator.run(gpgme_listkey)
+        self.assertNotEqual(exit_code, 0)
+
+        # We now create our gpg key.
+        cmd = "gpg --batch --passphrase ''"
+        cmd += f" --quick-generate-key {gpg_userid} default default"
+        self.assertRunOk(cmd)
+
+        # We should now see our key in the list.
+        self.assertRunOk(gpgme_listkey)
+
+        # We generate a plain text data file.
+        cmd = f"echo '{plain_data}' > {plain_file}"
+        self.assertRunOk(cmd)
+
+        # We encrypt the plain text file using gpgme-tool commands.
+        gpgme_enc_cmds = [
+            "RESET",
+            f"INPUT FILE={plain_file}",
+            f"OUTPUT FILE={enc_file}",
+            f"RECIPIENT {gpg_userid}",
+            "ENCRYPT",
+            "BYE"
+        ]
+        cmd = "gpgme-tool <<EOF\n"
+        cmd += "\n".join(gpgme_enc_cmds)
+        cmd += "\nEOF"
+        self.assertRunOk(cmd)
+
+        # The output encrypted file is supposed to exist and to have a
+        # size greater than zero.
+        self.assertRunOk(f"test -s {enc_file}")
+
+        # The output encrypted file is also expected to be different
+        # from the input plain text file.
+        _, exit_code = self.emulator.run(f"cmp {plain_file} {enc_file}")
+        self.assertNotEqual(exit_code, 0)
+
+        # We now decrypt the encrypted file using gpgme-tool commands.
+        gpgme_dec_cmds = [
+            "RESET",
+            f"INPUT FILE={enc_file}",
+            f"OUTPUT FILE={dec_file}",
+            "DECRYPT",
+            "BYE"
+        ]
+        cmd = "gpgme-tool <<EOF\n"
+        cmd += "\n".join(gpgme_dec_cmds)
+        cmd += "\nEOF"
+        self.assertRunOk(cmd)
+
+        # The decrypted file is supposed to be the same as the initial
+        # plain text file.
+        cmd = f"cmp {plain_file} {dec_file}"
+        self.assertRunOk(cmd)