/* notmuch - Not much of an email program, (just index and search) * * Copyright © 2009 Carl Worth * Copyright © 2009 Keith Packard * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see https://www.gnu.org/licenses/ . * * Authors: Carl Worth * Keith Packard */ #include "notmuch-client.h" #include "string-util.h" #include "sprinter.h" static void show_reply_headers (GMimeStream *stream, GMimeMessage *message) { /* Output RFC 2822 formatted (and RFC 2047 encoded) headers. */ if (g_mime_object_write_to_stream (GMIME_OBJECT (message), NULL, stream) < 0) { INTERNAL_ERROR ("failed to write headers to stdout\n"); } } static void format_part_reply (GMimeStream *stream, mime_node_t *node) { int i; if (node->envelope_file) { g_mime_stream_printf (stream, "On %s, %s wrote:\n", notmuch_message_get_header (node->envelope_file, "date"), notmuch_message_get_header (node->envelope_file, "from")); } else if (GMIME_IS_MESSAGE (node->part)) { GMimeMessage *message = GMIME_MESSAGE (node->part); char *recipients_string; g_mime_stream_printf (stream, "> From: %s\n", g_mime_message_get_from_string (message)); recipients_string = g_mime_message_get_address_string (message, GMIME_ADDRESS_TYPE_TO); if (recipients_string) g_mime_stream_printf (stream, "> To: %s\n", recipients_string); g_free (recipients_string); recipients_string = g_mime_message_get_address_string (message, GMIME_ADDRESS_TYPE_CC); if (recipients_string) g_mime_stream_printf (stream, "> Cc: %s\n", recipients_string); g_free (recipients_string); g_mime_stream_printf (stream, "> Subject: %s\n", g_mime_message_get_subject (message)); g_mime_stream_printf (stream, "> Date: %s\n", g_mime_message_get_date_string (node, message)); g_mime_stream_printf (stream, ">\n"); } else if (GMIME_IS_PART (node->part)) { GMimeContentType *content_type = g_mime_object_get_content_type (node->part); GMimeContentDisposition *disposition = g_mime_object_get_content_disposition (node->part); if (g_mime_content_type_is_type (content_type, "application", "pgp-encrypted") || g_mime_content_type_is_type (content_type, "application", "pgp-signature") || g_mime_content_type_is_type (content_type, "application", "pkcs7-mime")) { /* Ignore PGP/MIME and S/MIME cruft parts */ } else if (g_mime_content_type_is_type (content_type, "text", "*") && ! g_mime_content_type_is_type (content_type, "text", "html")) { show_text_part_content (node->part, stream, NOTMUCH_SHOW_TEXT_PART_REPLY); } else if (disposition && strcasecmp (g_mime_content_disposition_get_disposition (disposition), GMIME_DISPOSITION_ATTACHMENT) == 0) { const char *filename = g_mime_part_get_filename (GMIME_PART (node->part)); g_mime_stream_printf (stream, "Attachment: %s (%s)\n", filename, g_mime_content_type_get_mime_type (content_type)); } else { g_mime_stream_printf (stream, "Non-text part: %s\n", g_mime_content_type_get_mime_type (content_type)); } } for (i = 0; i < node->nchildren; i++) format_part_reply (stream, mime_node_child (node, i)); } typedef enum { USER_ADDRESS_IN_STRING, STRING_IN_USER_ADDRESS, STRING_IS_USER_ADDRESS, } address_match_t; /* Match given string against given address according to mode. */ static bool match_address (const char *str, const char *address, address_match_t mode) { switch (mode) { case USER_ADDRESS_IN_STRING: return strcasestr (str, address) != NULL; case STRING_IN_USER_ADDRESS: return strcasestr (address, str) != NULL; case STRING_IS_USER_ADDRESS: return strcasecmp (address, str) == 0; } return false; } /* Match given string against user's configured "primary" and "other" * addresses according to mode. */ static const char * address_match (const char *str, notmuch_config_t *config, address_match_t mode) { const char *primary; const char **other; size_t i, other_len; if (! str || *str == '\0') return NULL; primary = notmuch_config_get_user_primary_email (config); if (match_address (str, primary, mode)) return primary; other = notmuch_config_get_user_other_email (config, &other_len); for (i = 0; i < other_len; i++) { if (match_address (str, other[i], mode)) return other[i]; } return NULL; } /* Does the given string contain an address configured as one of the * user's "primary" or "other" addresses. If so, return the matching * address, NULL otherwise. */ static const char * user_address_in_string (const char *str, notmuch_config_t *config) { return address_match (str, config, USER_ADDRESS_IN_STRING); } /* Do any of the addresses configured as one of the user's "primary" * or "other" addresses contain the given string. If so, return the * matching address, NULL otherwise. */ static const char * string_in_user_address (const char *str, notmuch_config_t *config) { return address_match (str, config, STRING_IN_USER_ADDRESS); } /* Is the given address configured as one of the user's "primary" or * "other" addresses. */ static bool address_is_users (const char *address, notmuch_config_t *config) { return address_match (address, config, STRING_IS_USER_ADDRESS) != NULL; } /* Scan addresses in 'list'. * * If 'message' is non-NULL, then for each address in 'list' that is * not configured as one of the user's addresses in 'config', add that * address to 'message' as an address of 'type'. * * If 'user_from' is non-NULL and *user_from is NULL, *user_from will * be set to the first address encountered in 'list' that is the * user's address. * * Return the number of addresses added to 'message'. (If 'message' is * NULL, the function returns 0 by definition.) */ static unsigned int scan_address_list (InternetAddressList *list, notmuch_config_t *config, GMimeMessage *message, GMimeAddressType type, const char **user_from) { InternetAddress *address; int i; unsigned int n = 0; if (list == NULL) return 0; for (i = 0; i < internet_address_list_length (list); i++) { address = internet_address_list_get_address (list, i); if (INTERNET_ADDRESS_IS_GROUP (address)) { InternetAddressGroup *group; InternetAddressList *group_list; group = INTERNET_ADDRESS_GROUP (address); group_list = internet_address_group_get_members (group); n += scan_address_list (group_list, config, message, type, user_from); } else { InternetAddressMailbox *mailbox; const char *name; const char *addr; mailbox = INTERNET_ADDRESS_MAILBOX (address); name = internet_address_get_name (address); addr = internet_address_mailbox_get_addr (mailbox); if (address_is_users (addr, config)) { if (user_from && *user_from == NULL) *user_from = addr; } else if (message) { g_mime_message_add_mailbox (message, type, name, addr); n++; } } } return n; } /* Does the address in the Reply-To header of 'message' already appear * in either the 'To' or 'Cc' header of the message? */ static bool reply_to_header_is_redundant (GMimeMessage *message, InternetAddressList *reply_to_list) { const char *addr, *reply_to; InternetAddress *address; InternetAddressMailbox *mailbox; InternetAddressList *recipients; bool ret = false; int i; if (reply_to_list == NULL || internet_address_list_length (reply_to_list) != 1) return 0; address = internet_address_list_get_address (reply_to_list, 0); if (INTERNET_ADDRESS_IS_GROUP (address)) return 0; mailbox = INTERNET_ADDRESS_MAILBOX (address); reply_to = internet_address_mailbox_get_addr (mailbox); recipients = g_mime_message_get_all_recipients (message); for (i = 0; i < internet_address_list_length (recipients); i++) { address = internet_address_list_get_address (recipients, i); if (INTERNET_ADDRESS_IS_GROUP (address)) continue; mailbox = INTERNET_ADDRESS_MAILBOX (address); addr = internet_address_mailbox_get_addr (mailbox); if (strcmp (addr, reply_to) == 0) { ret = true; break; } } g_object_unref (G_OBJECT (recipients)); return ret; } static InternetAddressList * get_sender (GMimeMessage *message) { InternetAddressList *reply_to_list; reply_to_list = g_mime_message_get_reply_to_list (message); if (reply_to_list && internet_address_list_length (reply_to_list) > 0) { /* * Some mailing lists munge the Reply-To header despite it * being A Bad Thing, see * http://marc.merlins.org/netrants/reply-to-harmful.html * * The munging is easy to detect, because it results in a * redundant reply-to header, (with an address that already * exists in either To or Cc). So in this case, we ignore the * Reply-To field and use the From header. This ensures the * original sender will get the reply even if not subscribed * to the list. Note that the address in the Reply-To header * will always appear in the reply if reply_all is true. */ if (! reply_to_header_is_redundant (message, reply_to_list)) return reply_to_list; } return g_mime_message_get_from (message); } static InternetAddressList * get_to (GMimeMessage *message) { return g_mime_message_get_addresses (message, GMIME_ADDRESS_TYPE_TO); } static InternetAddressList * get_cc (GMimeMessage *message) { return g_mime_message_get_addresses (message, GMIME_ADDRESS_TYPE_CC); } static InternetAddressList * get_bcc (GMimeMessage *message) { return g_mime_message_get_addresses (message, GMIME_ADDRESS_TYPE_BCC); } /* Augment the recipients of 'reply' from the "Reply-to:", "From:", * "To:", "Cc:", and "Bcc:" headers of 'message'. * * If 'reply_all' is true, use sender and all recipients, otherwise * scan the headers for the first that contains something other than * the user's addresses and add the recipients from this header * (typically this would be reply-to-sender, but also handles reply to * user's own message in a sensible way). * * If any of the user's addresses were found in these headers, the * first of these returned, otherwise NULL is returned. */ static const char * add_recipients_from_message (GMimeMessage *reply, notmuch_config_t *config, GMimeMessage *message, bool reply_all) { struct { InternetAddressList * (*get_header)(GMimeMessage *message); GMimeAddressType recipient_type; } reply_to_map[] = { { get_sender, GMIME_ADDRESS_TYPE_TO }, { get_to, GMIME_ADDRESS_TYPE_TO }, { get_cc, GMIME_ADDRESS_TYPE_CC }, { get_bcc, GMIME_ADDRESS_TYPE_BCC }, }; const char *from_addr = NULL; unsigned int i; unsigned int n = 0; for (i = 0; i < ARRAY_SIZE (reply_to_map); i++) { InternetAddressList *recipients; recipients = reply_to_map[i].get_header (message); n += scan_address_list (recipients, config, reply, reply_to_map[i].recipient_type, &from_addr); if (! reply_all && n) { /* Stop adding new recipients in reply-to-sender mode if * we have added some recipient(s) above. * * This also handles the case of user replying to his own * message, where reply-to/from is not a recipient. In * this case there may be more than one recipient even if * not replying to all. */ reply = NULL; /* From address and some recipients are enough, bail out. */ if (from_addr) break; } } /* If no recipients were added but we found one of the user's * addresses to use as a from address then the message is from the * user to the user - add the discovered from address to the list * of recipients so that the reply goes back to the user. */ if (n == 0 && from_addr) g_mime_message_add_mailbox (reply, GMIME_ADDRESS_TYPE_TO, NULL, from_addr); return from_addr; } /* * Look for the user's address in " for " in the * received headers. * * Return the address that was found, if any, and NULL otherwise. */ static const char * guess_from_in_received_for (notmuch_config_t *config, const char *received) { const char *ptr; ptr = strstr (received, " for "); if (! ptr) return NULL; return user_address_in_string (ptr, config); } /* * Parse all the " by MTA ..." parts in received headers to guess the * email address that this was originally delivered to. * * Extract just the MTA here by removing leading whitespace and * assuming that the MTA name ends at the next whitespace. Test for * *(by+4) to be non-'\0' to make sure there's something there at all * - and then assume that the first whitespace delimited token that * follows is the receiving system in this step of the receive chain. * * Return the address that was found, if any, and NULL otherwise. */ static const char * guess_from_in_received_by (notmuch_config_t *config, const char *received) { const char *addr; const char *by = received; char *domain, *tld, *mta, *ptr, *token; while ((by = strstr (by, " by ")) != NULL) { by += 4; if (*by == '\0') break; mta = xstrdup (by); token = strtok (mta, " \t"); if (token == NULL) { free (mta); break; } /* * Now extract the last two components of the MTA host name as * domain and tld. */ domain = tld = NULL; while ((ptr = strsep (&token, ". \t")) != NULL) { if (*ptr == '\0') continue; domain = tld; tld = ptr; } if (domain) { /* * Recombine domain and tld and look for it among the * configured email addresses. This time we have a known * domain name and nothing else - so the test is the other * way around: we check if this is a substring of one of * the email addresses. */ *(tld - 1) = '.'; addr = string_in_user_address (domain, config); if (addr) { free (mta); return addr; } } free (mta); } return NULL; } /* * Get the concatenated Received: headers and search from the front * (last Received: header added) and try to extract from them * indications to which email address this message was delivered. * * The Received: header is special in our get_header function and is * always concatenated. * * Return the address that was found, if any, and NULL otherwise. */ static const char * guess_from_in_received_headers (notmuch_config_t *config, notmuch_message_t *message) { const char *received, *addr; char *sanitized; received = notmuch_message_get_header (message, "received"); if (! received) return NULL; sanitized = sanitize_string (NULL, received); if (! sanitized) return NULL; addr = guess_from_in_received_for (config, sanitized); if (! addr) addr = guess_from_in_received_by (config, sanitized); talloc_free (sanitized); return addr; } /* * Try to find user's email address in one of the extra To-like * headers: Envelope-To, X-Original-To, and Delivered-To (searched in * that order). * * Return the address that was found, if any, and NULL otherwise. */ static const char * get_from_in_to_headers (notmuch_config_t *config, notmuch_message_t *message) { size_t i; const char *tohdr, *addr; const char *to_headers[] = { "Envelope-to", "X-Original-To", "Delivered-To", }; for (i = 0; i < ARRAY_SIZE (to_headers); i++) { tohdr = notmuch_message_get_header (message, to_headers[i]); /* Note: tohdr potentially contains a list of email addresses. */ addr = user_address_in_string (tohdr, config); if (addr) return addr; } return NULL; } static GMimeMessage * create_reply_message (void *ctx, notmuch_config_t *config, notmuch_message_t *message, GMimeMessage *mime_message, bool reply_all, bool limited) { const char *subject, *from_addr = NULL; const char *in_reply_to, *orig_references, *references; /* * Use the below header order for limited headers, "pretty" order * otherwise. */ GMimeMessage *reply = g_mime_message_new (limited ? 0 : 1); if (reply == NULL) { fprintf (stderr, "Out of memory\n"); return NULL; } in_reply_to = talloc_asprintf (ctx, "<%s>", notmuch_message_get_message_id (message)); g_mime_object_set_header (GMIME_OBJECT (reply), "In-Reply-To", in_reply_to, NULL); orig_references = notmuch_message_get_header (message, "references"); if (orig_references && *orig_references) references = talloc_asprintf (ctx, "%s %s", orig_references, in_reply_to); else references = talloc_strdup (ctx, in_reply_to); g_mime_object_set_header (GMIME_OBJECT (reply), "References", references, NULL); from_addr = add_recipients_from_message (reply, config, mime_message, reply_all); /* The above is all that is needed for limited headers. */ if (limited) return reply; /* * Sadly, there is no standard way to find out to which email * address a mail was delivered - what is in the headers depends * on the MTAs used along the way. * * If none of the user's email addresses are in the To: or Cc: * headers, we try a number of heuristics which hopefully will * answer this question. * * First, check for Envelope-To:, X-Original-To:, and * Delivered-To: headers. */ if (from_addr == NULL) from_addr = get_from_in_to_headers (config, message); /* * Check for a (for ) clause in Received: headers, * and the domain part of known email addresses in the 'by' part * of Received: headers */ if (from_addr == NULL) from_addr = guess_from_in_received_headers (config, message); /* Default to user's primary address. */ if (from_addr == NULL) from_addr = notmuch_config_get_user_primary_email (config); from_addr = talloc_asprintf (ctx, "%s <%s>", notmuch_config_get_user_name (config), from_addr); g_mime_object_set_header (GMIME_OBJECT (reply), "From", from_addr, NULL); subject = g_mime_message_get_subject (mime_message); if (subject) { if (strncasecmp (subject, "Re:", 3)) subject = talloc_asprintf (ctx, "Re: %s", subject); g_mime_message_set_subject (reply, subject, NULL); } return reply; } enum { FORMAT_DEFAULT, FORMAT_JSON, FORMAT_SEXP, FORMAT_HEADERS_ONLY, }; static int do_reply (notmuch_config_t *config, notmuch_query_t *query, notmuch_show_params_t *params, int format, bool reply_all) { GMimeMessage *reply; mime_node_t *node; notmuch_messages_t *messages; notmuch_message_t *message; notmuch_status_t status; struct sprinter *sp = NULL; if (format == FORMAT_JSON || format == FORMAT_SEXP) { unsigned count; status = notmuch_query_count_messages (query, &count); if (print_status_query ("notmuch reply", query, status)) return 1; if (count != 1) { fprintf (stderr, "Error: search term did not match precisely one message (matched %u messages).\n", count); return 1; } if (format == FORMAT_JSON) sp = sprinter_json_create (config, stdout); else sp = sprinter_sexp_create (config, stdout); } status = notmuch_query_search_messages (query, &messages); if (print_status_query ("notmuch reply", query, status)) return 1; for (; notmuch_messages_valid (messages); notmuch_messages_move_to_next (messages)) { message = notmuch_messages_get (messages); if (mime_node_open (config, message, ¶ms->crypto, &node)) return 1; reply = create_reply_message (config, config, message, GMIME_MESSAGE (node->part), reply_all, format == FORMAT_HEADERS_ONLY); if (! reply) return 1; if (format == FORMAT_JSON || format == FORMAT_SEXP) { sp->begin_map (sp); /* The headers of the reply message we've created */ sp->map_key (sp, "reply-headers"); /* FIXME: send msg_crypto here to avoid killing the * subject line on reply to encrypted messages! */ format_headers_sprinter (sp, reply, true, NULL); /* Start the original */ sp->map_key (sp, "original"); format_part_sprinter (config, sp, node, true, false); /* End */ sp->end (sp); } else { GMimeStream *stream_stdout = stream_stdout = g_mime_stream_stdout_new (); if (stream_stdout) { show_reply_headers (stream_stdout, reply); if (format == FORMAT_DEFAULT) format_part_reply (stream_stdout, node); } g_mime_stream_flush (stream_stdout); g_object_unref (stream_stdout); } g_object_unref (G_OBJECT (reply)); talloc_free (node); notmuch_message_destroy (message); } return 0; } int notmuch_reply_command (notmuch_config_t *config, unused(notmuch_database_t *notmuch), int argc, char *argv[]) { notmuch_database_t *notmuch; notmuch_query_t *query; char *query_string; int opt_index; notmuch_show_params_t params = { .part = -1, .crypto = { .decrypt = NOTMUCH_DECRYPT_AUTO }, }; int format = FORMAT_DEFAULT; int reply_all = true; notmuch_opt_desc_t options[] = { { .opt_keyword = &format, .name = "format", .keywords = (notmuch_keyword_t []){ { "default", FORMAT_DEFAULT }, { "json", FORMAT_JSON }, { "sexp", FORMAT_SEXP }, { "headers-only", FORMAT_HEADERS_ONLY }, { 0, 0 } } }, { .opt_int = ¬much_format_version, .name = "format-version" }, { .opt_keyword = &reply_all, .name = "reply-to", .keywords = (notmuch_keyword_t []){ { "all", true }, { "sender", false }, { 0, 0 } } }, { .opt_keyword = (int *) (¶ms.crypto.decrypt), .name = "decrypt", .keyword_no_arg_value = "true", .keywords = (notmuch_keyword_t []){ { "false", NOTMUCH_DECRYPT_FALSE }, { "auto", NOTMUCH_DECRYPT_AUTO }, { "true", NOTMUCH_DECRYPT_NOSTASH }, { 0, 0 } } }, { .opt_inherit = notmuch_shared_options }, { } }; opt_index = parse_arguments (argc, argv, options, 1); if (opt_index < 0) return EXIT_FAILURE; notmuch_process_shared_options (argv[0]); notmuch_exit_if_unsupported_format (); query_string = query_string_from_args (config, argc - opt_index, argv + opt_index); if (query_string == NULL) { fprintf (stderr, "Out of memory\n"); return EXIT_FAILURE; } if (*query_string == '\0') { fprintf (stderr, "Error: notmuch reply requires at least one search term.\n"); return EXIT_FAILURE; } if (notmuch_database_open (notmuch_config_get_database_path (config), NOTMUCH_DATABASE_MODE_READ_ONLY, ¬much)) return EXIT_FAILURE; notmuch_exit_if_unmatched_db_uuid (notmuch); query = notmuch_query_create (notmuch, query_string); if (query == NULL) { fprintf (stderr, "Out of memory\n"); return EXIT_FAILURE; } if (do_reply (config, query, ¶ms, format, reply_all) != 0) return EXIT_FAILURE; _notmuch_crypto_cleanup (¶ms.crypto); notmuch_query_destroy (query); notmuch_database_destroy (notmuch); return EXIT_SUCCESS; }