lib: convert notmuch decryption policy to an enum

Future patches in this series will introduce new policies; this merely
readies the way for them.

We also convert --try-decrypt to a keyword argument instead of a boolean.

lib/index.cc

@@ -525,7 +525,7 @@ _index_encrypted_mime_part (notmuch_message_t *message,
     notmuch_database_t * notmuch = NULL;
     GMimeObject *clear = NULL;
 
-    if (!indexopts || !notmuch_indexopts_get_decrypt_policy (indexopts))
+    if (!indexopts || (notmuch_indexopts_get_decrypt_policy (indexopts) == NOTMUCH_DECRYPT_FALSE))
 	return;
 
     notmuch = _notmuch_message_database (message);

lib/indexopts.c

@@ -26,25 +26,26 @@ notmuch_database_get_default_indexopts (notmuch_database_t *db)
     notmuch_indexopts_t *ret = talloc_zero (db, notmuch_indexopts_t);
     if (!ret)
 	return ret;
+    ret->crypto.decrypt = NOTMUCH_DECRYPT_FALSE;
 
-    char * decrypt;
-    notmuch_status_t err = notmuch_database_get_config (db, "index.decrypt", &decrypt);
+    char * decrypt_policy;
+    notmuch_status_t err = notmuch_database_get_config (db, "index.decrypt", &decrypt_policy);
     if (err)
 	return ret;
 
-    if (decrypt &&
-	((!(strcasecmp(decrypt, "true"))) ||
-	 (!(strcasecmp(decrypt, "yes"))) ||
-	 (!(strcasecmp(decrypt, "1")))))
-	notmuch_indexopts_set_decrypt_policy (ret, true);
+    if (decrypt_policy &&
+	((!(strcasecmp(decrypt_policy, "true"))) ||
+	 (!(strcasecmp(decrypt_policy, "yes"))) ||
+	 (!(strcasecmp(decrypt_policy, "1")))))
+	notmuch_indexopts_set_decrypt_policy (ret, NOTMUCH_DECRYPT_TRUE);
 
-    free (decrypt);
+    free (decrypt_policy);
     return ret;
 }
 
 notmuch_status_t
 notmuch_indexopts_set_decrypt_policy (notmuch_indexopts_t *indexopts,
-				      notmuch_bool_t decrypt_policy)
+				      notmuch_decryption_policy_t decrypt_policy)
 {
     if (!indexopts)
 	return NOTMUCH_STATUS_NULL_POINTER;
@@ -52,7 +53,7 @@ notmuch_indexopts_set_decrypt_policy (notmuch_indexopts_t *indexopts,
     return NOTMUCH_STATUS_SUCCESS;
 }
 
-notmuch_bool_t
+notmuch_decryption_policy_t
 notmuch_indexopts_get_decrypt_policy (const notmuch_indexopts_t *indexopts)
 {
     if (!indexopts)

lib/notmuch.h

@@ -2233,6 +2233,16 @@ notmuch_config_list_destroy (notmuch_config_list_t *config_list);
 notmuch_indexopts_t *
 notmuch_database_get_default_indexopts (notmuch_database_t *db);
 
+/**
+ * Stating a policy about how to decrypt messages.
+ *
+ * See index.decrypt in notmuch-config(1) for more details.
+ */
+typedef enum {
+    NOTMUCH_DECRYPT_FALSE,
+    NOTMUCH_DECRYPT_TRUE,
+} notmuch_decryption_policy_t;
+
 /**
  * Specify whether to decrypt encrypted parts while indexing.
  *
@@ -2245,7 +2255,7 @@ notmuch_database_get_default_indexopts (notmuch_database_t *db);
  */
 notmuch_status_t
 notmuch_indexopts_set_decrypt_policy (notmuch_indexopts_t *indexopts,
-				      notmuch_bool_t decrypt_policy);
+				      notmuch_decryption_policy_t decrypt_policy);
 
 /**
  * Return whether to decrypt encrypted parts while indexing.
@@ -2253,7 +2263,7 @@ notmuch_indexopts_set_decrypt_policy (notmuch_indexopts_t *indexopts,
  *
  * @since libnotmuch 5.1 (notmuch 0.26)
  */
-notmuch_bool_t
+notmuch_decryption_policy_t
 notmuch_indexopts_get_decrypt_policy (const notmuch_indexopts_t *indexopts);
 
 /**

mime-node.c

@@ -270,7 +270,7 @@ _mime_node_create (mime_node_t *parent, GMimeObject *part)
     }
 
 #if (GMIME_MAJOR_VERSION < 3)
-    if ((GMIME_IS_MULTIPART_ENCRYPTED (part) && node->ctx->crypto->decrypt)
+    if ((GMIME_IS_MULTIPART_ENCRYPTED (part) && (node->ctx->crypto->decrypt == NOTMUCH_DECRYPT_TRUE))
 	|| (GMIME_IS_MULTIPART_SIGNED (part) && node->ctx->crypto->verify)) {
 	GMimeContentType *content_type = g_mime_object_get_content_type (part);
 	const char *protocol = g_mime_content_type_get_parameter (content_type, "protocol");
@@ -286,7 +286,7 @@ _mime_node_create (mime_node_t *parent, GMimeObject *part)
 #endif
 
     /* Handle PGP/MIME parts */
-    if (GMIME_IS_MULTIPART_ENCRYPTED (part) && node->ctx->crypto->decrypt) {
+    if (GMIME_IS_MULTIPART_ENCRYPTED (part) && (node->ctx->crypto->decrypt == NOTMUCH_DECRYPT_TRUE)) {
 	if (node->nchildren != 2) {
 	    /* this violates RFC 3156 section 4, so we won't bother with it. */
 	    fprintf (stderr, "Error: %d part(s) for a multipart/encrypted "

notmuch-client.h

@@ -414,9 +414,10 @@ struct mime_node {
 
 /* Construct a new MIME node pointing to the root message part of
  * message. If crypto->verify is true, signed child parts will be
- * verified. If crypto->decrypt is true, encrypted child parts will be
- * decrypted.  If the crypto contexts (crypto->gpgctx or
- * crypto->pkcs7) are NULL, they will be lazily initialized.
+ * verified. If crypto->decrypt is NOTMUCH_DECRYPT_TRUE, encrypted
+ * child parts will be decrypted.  If the crypto contexts
+ * (crypto->gpgctx or crypto->pkcs7) are NULL, they will be lazily
+ * initialized.
  *
  * Return value:
  *
@@ -500,7 +501,7 @@ int notmuch_minimal_options (const char* subcommand_name,
 /* the state chosen by the user invoking one of the notmuch
  * subcommands that does indexing */
 struct _notmuch_client_indexing_cli_choices {
-    bool decrypt_policy;
+    int decrypt_policy;
     bool decrypt_policy_set;
     notmuch_indexopts_t * opts;
 };

notmuch-reply.c

@@ -700,9 +700,11 @@ notmuch_reply_command (notmuch_config_t *config, int argc, char *argv[])
     int opt_index;
     notmuch_show_params_t params = {
 	.part = -1,
+	.crypto = { .decrypt = NOTMUCH_DECRYPT_FALSE },
     };
     int format = FORMAT_DEFAULT;
     int reply_all = true;
+    bool decrypt = false;
 
     notmuch_opt_desc_t options[] = {
 	{ .opt_keyword = &format, .name = "format", .keywords =
@@ -716,7 +718,7 @@ notmuch_reply_command (notmuch_config_t *config, int argc, char *argv[])
 	  (notmuch_keyword_t []){ { "all", true },
 				  { "sender", false },
 				  { 0, 0 } } },
-	{ .opt_bool = &params.crypto.decrypt, .name = "decrypt" },
+	{ .opt_bool = &decrypt, .name = "decrypt" },
 	{ .opt_inherit = notmuch_shared_options },
 	{ }
     };
@@ -726,6 +728,8 @@ notmuch_reply_command (notmuch_config_t *config, int argc, char *argv[])
 	return EXIT_FAILURE;
 
     notmuch_process_shared_options (argv[0]);
+    if (decrypt)
+	params.crypto.decrypt = NOTMUCH_DECRYPT_TRUE;
 
     notmuch_exit_if_unsupported_format ();
 

notmuch-show.c

@@ -1083,11 +1083,13 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
 	.part = -1,
 	.omit_excluded = true,
 	.output_body = true,
+	.crypto = { .decrypt = NOTMUCH_DECRYPT_FALSE },
     };
     int format = NOTMUCH_FORMAT_NOT_SPECIFIED;
     bool exclude = true;
     bool entire_thread_set = false;
     bool single_message;
+    bool decrypt = false;
 
     notmuch_opt_desc_t options[] = {
 	{ .opt_keyword = &format, .name = "format", .keywords =
@@ -1102,7 +1104,7 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
 	{ .opt_bool = &params.entire_thread, .name = "entire-thread",
 	  .present = &entire_thread_set },
 	{ .opt_int = &params.part, .name = "part" },
-	{ .opt_bool = &params.crypto.decrypt, .name = "decrypt" },
+	{ .opt_bool = &decrypt, .name = "decrypt" },
 	{ .opt_bool = &params.crypto.verify, .name = "verify" },
 	{ .opt_bool = &params.output_body, .name = "body" },
 	{ .opt_bool = &params.include_html, .name = "include-html" },
@@ -1116,9 +1118,11 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
 
     notmuch_process_shared_options (argv[0]);
 
-    /* decryption implies verification */
-    if (params.crypto.decrypt)
+    if (decrypt) {
+	params.crypto.decrypt = NOTMUCH_DECRYPT_TRUE;
+	/* decryption implies verification */
 	params.crypto.verify = true;
+    }
 
     /* specifying a part implies single message display */
     single_message = params.part >= 0;

notmuch.c

@@ -99,8 +99,11 @@ int notmuch_minimal_options (const char *subcommand_name,
 
 struct _notmuch_client_indexing_cli_choices indexing_cli_choices = { };
 const notmuch_opt_desc_t  notmuch_shared_indexing_options [] = {
-    { .opt_bool = &indexing_cli_choices.decrypt_policy,
-      .present = &indexing_cli_choices.decrypt_policy_set,
+    { .opt_keyword = &indexing_cli_choices.decrypt_policy,
+      .present = &indexing_cli_choices.decrypt_policy_set, .keywords =
+      (notmuch_keyword_t []){ { "false", NOTMUCH_DECRYPT_FALSE },
+			      { "true", NOTMUCH_DECRYPT_TRUE },
+			      { 0, 0 } },
       .name = "decrypt" },
     { }
 };
@@ -117,15 +120,15 @@ notmuch_process_shared_indexing_options (notmuch_database_t *notmuch, g_mime_3_u
 	    return NOTMUCH_STATUS_OUT_OF_MEMORY;
 	status = notmuch_indexopts_set_decrypt_policy (indexing_cli_choices.opts, indexing_cli_choices.decrypt_policy);
 	if (status != NOTMUCH_STATUS_SUCCESS) {
-	    fprintf (stderr, "Error: Failed to set index decryption policy to %s. (%s)\n",
-		     indexing_cli_choices.decrypt_policy ? "True" : "False", notmuch_status_to_string (status));
+	    fprintf (stderr, "Error: Failed to set index decryption policy to %d. (%s)\n",
+		     indexing_cli_choices.decrypt_policy, notmuch_status_to_string (status));
 	    notmuch_indexopts_destroy (indexing_cli_choices.opts);
 	    indexing_cli_choices.opts = NULL;
 	    return status;
 	}
     }
 #if (GMIME_MAJOR_VERSION < 3)
-    if (indexing_cli_choices.opts && notmuch_indexopts_get_decrypt_policy (indexing_cli_choices.opts)) {
+    if (indexing_cli_choices.opts && notmuch_indexopts_get_decrypt_policy (indexing_cli_choices.opts) == NOTMUCH_DECRYPT_TRUE) {
 	const char* gpg_path = notmuch_config_get_crypto_gpg_path (config);
 	if (gpg_path && strcmp(gpg_path, "gpg"))
 	    fprintf (stderr, "Warning: deprecated crypto.gpg_path is set to '%s'\n"

test/T357-index-decryption.sh

@@ -71,8 +71,8 @@ test_expect_equal \
 
 # try reinserting it with decryption, should appear again, but now we
 # have two copies of the message:
-test_begin_subtest "message cleartext is present after reinserting with --decrypt"
-notmuch insert --folder=sent --decrypt <<<"$contents"
+test_begin_subtest "message cleartext is present after reinserting with --decrypt=true"
+notmuch insert --folder=sent --decrypt=true <<<"$contents"
 output=$(notmuch search wumpus)
 expected='thread:0000000000000003   2000-01-01 [1/1(2)] Notmuch Test Suite; test encrypted message for cleartext index 002 (encrypted inbox unread)'
 test_expect_equal \
@@ -93,8 +93,8 @@ test_expect_equal \
 # try inserting it with decryption, should appear as a single copy
 # (note: i think thread id skips 4 because of duplicate message-id
 # insertion, above)
-test_begin_subtest "message cleartext is present with insert --decrypt"
-notmuch insert --folder=sent --decrypt <<<"$contents"
+test_begin_subtest "message cleartext is present with insert --decrypt=true"
+notmuch insert --folder=sent --decrypt=true <<<"$contents"
 output=$(notmuch search wumpus)
 expected='thread:0000000000000005   2000-01-01 [1/1] Notmuch Test Suite; test encrypted message for cleartext index 002 (encrypted inbox unread)'
 test_expect_equal \
@@ -159,7 +159,7 @@ test_expect_equal \
 add_email_corpus crypto
 
 test_begin_subtest "indexing message fails when secret key not available"
-notmuch reindex --decrypt id:simple-encrypted@crypto.notmuchmail.org
+notmuch reindex --decrypt=true id:simple-encrypted@crypto.notmuchmail.org
 output=$(notmuch dump )
 expected='#notmuch-dump batch-tag:3 config,properties,tags
 +encrypted +inbox +unread -- id:simple-encrypted@crypto.notmuchmail.org
@@ -180,7 +180,7 @@ notmuch restore <<EOF
 #notmuch-dump batch-tag:3 config,properties,tags
 #= simple-encrypted@crypto.notmuchmail.org session-key=9%3AFC09987F5F927CC0CC0EE80A96E4C5BBF4A499818FB591207705DFDDD6112CF9
 EOF
-notmuch reindex --decrypt id:simple-encrypted@crypto.notmuchmail.org
+notmuch reindex --decrypt=true id:simple-encrypted@crypto.notmuchmail.org
 output=$(notmuch search sekrit)
 expected='thread:0000000000000001   2016-12-22 [1/1] Daniel Kahn Gillmor; encrypted message (encrypted inbox unread)'
 if [ $NOTMUCH_HAVE_GMIME_SESSION_KEYS -eq 0 ]; then

util/crypto.h

@@ -7,7 +7,7 @@
 
 typedef struct _notmuch_crypto {
     bool verify;
-    bool decrypt;
+    notmuch_decryption_policy_t decrypt;
 #if (GMIME_MAJOR_VERSION < 3)
     GMimeCryptoContext* gpgctx;
     GMimeCryptoContext* pkcs7ctx;