struct ptype *data_item_add(struct data *d, struct data_reg *d_reg, unsigned int data_id, const char *key) { struct ptype *value = ptype_alloc_from_type(d_reg->items[data_id].value_type); if (!value) return NULL; if (data_item_add_ptype(d, data_id, key, value) != POM_OK) { ptype_cleanup(value); return NULL; } return value; }
static int analyzer_smtp_event_process_begin(struct event *evt, void *obj, struct proto_process_stack *stack, unsigned int stack_index) { struct analyzer *analyzer = obj; struct analyzer_smtp_priv *apriv = analyzer->priv; struct proto_process_stack *s = &stack[stack_index]; if (!s->ce) return POM_ERR; // Only process stuff if we have the DATA event or if we already have an event struct event_reg *evt_reg = event_get_reg(evt); struct data *evt_data = event_get_data(evt); struct analyzer_smtp_ce_priv *cpriv = conntrack_get_priv(s->ce, analyzer); // It's expected that an SMTP connection will always contain at least one message // So we always create the cpriv and event, no matter what if (!cpriv) { cpriv = malloc(sizeof(struct analyzer_smtp_ce_priv)); if (!cpriv) { pom_oom(sizeof(struct analyzer_smtp_ce_priv)); return POM_ERR; } memset(cpriv, 0, sizeof(struct analyzer_smtp_ce_priv)); if (conntrack_add_priv(s->ce, analyzer, cpriv, analyzer_smtp_ce_priv_cleanup) != POM_OK) { free(cpriv); return POM_ERR; } } if (!cpriv->evt_msg) { cpriv->evt_msg = event_alloc(apriv->evt_msg); if (!cpriv->evt_msg) return POM_ERR; } struct data *msg_data = event_get_data(cpriv->evt_msg); if (evt_reg == apriv->evt_cmd) { if (!cpriv->common_data_fetched) analyzer_smtp_event_fetch_common_data(cpriv, stack, stack_index, POM_DIR_REVERSE(s->direction)); // Process commands // A message was being transmitted and we recevied a new command if (event_is_started(cpriv->evt_msg)) { event_process_end(cpriv->evt_msg); cpriv->evt_msg = NULL; } char *cmd = PTYPE_STRING_GETVAL(evt_data[proto_smtp_cmd_name].value); if (!cmd) return POM_OK; char *arg = PTYPE_STRING_GETVAL(evt_data[proto_smtp_cmd_arg].value); if (arg) { while (*arg == ' ') arg++; } if (!strcasecmp(cmd, "MAIL")) { if (strncasecmp(arg, "FROM:", strlen("FROM:"))) { pomlog(POMLOG_DEBUG "Unparseable MAIL command"); return POM_OK; } arg += strlen("FROM:"); while (*arg == ' ') arg++; if (*arg == '<') arg++; size_t len; char *end = strchr(arg, '>'); if (end) len = end - arg; else len = strlen(arg); PTYPE_STRING_SETVAL_N(msg_data[analyzer_smtp_msg_from].value, arg, len); data_set(msg_data[analyzer_smtp_msg_from]); cpriv->last_cmd = analyzer_smtp_last_cmd_mail_from; } else if (!strcasecmp(cmd, "RCPT")) { if (strncasecmp(arg, "TO:", strlen("TO:"))) { pomlog(POMLOG_DEBUG "Unparseable RCPT command"); return POM_OK; } arg += strlen("TO:"); while (*arg == ' ') arg++; if (*arg == '<') arg++; size_t len; char *end = strchr(arg, '>'); if (end) len = end - arg; else len = strlen(arg); struct ptype *to = ptype_alloc("string"); if (!to) return POM_ERR; PTYPE_STRING_SETVAL_N(to, arg, len); if (data_item_add_ptype(msg_data, analyzer_smtp_msg_to, strdup("to"), to) != POM_OK) { ptype_cleanup(to); return POM_ERR; } cpriv->last_cmd = analyzer_smtp_last_cmd_rcpt_to; } else if (!strcasecmp(cmd, "DATA")) { cpriv->last_cmd = analyzer_smtp_last_cmd_data; if (!event_is_started(cpriv->evt_msg)) { analyzer_smtp_event_fill_common_data(cpriv, msg_data); event_process_begin(cpriv->evt_msg, stack, stack_index, event_get_timestamp(evt)); } else { pomlog(POMLOG_DEBUG "Message event already started !"); } } else if (!strcasecmp(cmd, "RSET")) { // Cleanup the event event_cleanup(cpriv->evt_msg); cpriv->evt_msg = NULL; cpriv->last_cmd = analyzer_smtp_last_cmd_other; } else if (!strcasecmp(cmd, "HELO") || !strcasecmp(cmd, "EHLO")) { if (cpriv->client_hello) { pomlog(POMLOG_DEBUG "We already have a client hello !"); free(cpriv->client_hello); } cpriv->client_hello = strdup(arg); if (!cpriv->client_hello) { pom_oom(strlen(arg) + 1); return POM_ERR; } cpriv->last_cmd = analyzer_smtp_last_cmd_other; } else if (!strcasecmp(cmd, "AUTH")) { if (!strncasecmp(arg, "PLAIN", strlen("PLAIN"))) { arg += strlen("PLAIN"); while (*arg == ' ') arg++; if (cpriv->evt_auth) { event_process_end(cpriv->evt_auth); cpriv->evt_auth = NULL; } if (strlen(arg)) { if (analyzer_smtp_parse_auth_plain(apriv, cpriv, arg) == POM_OK) { event_process_begin(cpriv->evt_auth, stack, stack_index, event_get_timestamp(evt)); cpriv->last_cmd = analyzer_smtp_last_cmd_auth_plain_creds; } } else { cpriv->last_cmd = analyzer_smtp_last_cmd_auth_plain; } } else if (!strncasecmp(arg, "LOGIN", strlen("LOGIN"))) { arg += strlen("LOGIN"); while (*arg == ' ') arg++; if (cpriv->evt_auth) { event_process_end(cpriv->evt_auth); cpriv->evt_auth = NULL; } cpriv->evt_auth = event_alloc(apriv->evt_auth); if (!cpriv->evt_auth) return POM_ERR; struct data *auth_data = event_get_data(cpriv->evt_auth); analyzer_smtp_event_fill_common_data(cpriv, auth_data); // Set the authentication type PTYPE_STRING_SETVAL(auth_data[analyzer_smtp_auth_type].value, "LOGIN"); data_set(auth_data[analyzer_smtp_auth_type]); if (strlen(arg)) { char *username = NULL; size_t out_len = 0; struct ptype *username_pt = NULL; if (decoder_decode_simple("base64", arg, strlen(arg), &username, &out_len) == POM_OK) { username_pt = ptype_alloc("string"); if (username_pt) { PTYPE_STRING_SETVAL_P(username_pt, username); if (data_item_add_ptype(auth_data, analyzer_smtp_auth_params, strdup("username"), username_pt) != POM_OK) { ptype_cleanup(username_pt); event_cleanup(cpriv->evt_auth); cpriv->evt_auth = NULL; username_pt = NULL; } } else { free(username); } } if (!username_pt) { cpriv->last_cmd = analyzer_smtp_last_cmd_other; event_process_begin(cpriv->evt_auth, stack, stack_index, event_get_timestamp(evt)); } } else { cpriv->last_cmd = analyzer_smtp_last_cmd_auth_login; } } } else if (cpriv->last_cmd == analyzer_smtp_last_cmd_auth_plain) { // We are expecting the credentials right now if (analyzer_smtp_parse_auth_plain(apriv, cpriv, cmd) == POM_OK) { event_process_begin(cpriv->evt_auth, stack, stack_index, event_get_timestamp(evt)); cpriv->last_cmd = analyzer_smtp_last_cmd_auth_plain_creds; } else { cpriv->last_cmd = analyzer_smtp_last_cmd_other; } } else if (cpriv->last_cmd == analyzer_smtp_last_cmd_auth_login) { char *username = NULL; size_t out_len = 0; struct ptype *username_pt = NULL; if (decoder_decode_simple("base64", cmd, strlen(cmd), &username, &out_len) == POM_OK) { username_pt = ptype_alloc("string"); if (username_pt) { PTYPE_STRING_SETVAL_P(username_pt, username); struct data *auth_data = event_get_data(cpriv->evt_auth); if (data_item_add_ptype(auth_data, analyzer_smtp_auth_params, strdup("username"), username_pt) != POM_OK) { ptype_cleanup(username_pt); event_process_end(cpriv->evt_auth); cpriv->evt_auth = NULL; username_pt = NULL; } } else { free(username); } } if (!username_pt) { cpriv->last_cmd = analyzer_smtp_last_cmd_other; } else { event_process_begin(cpriv->evt_auth, stack, stack_index, event_get_timestamp(evt)); cpriv->last_cmd = analyzer_smtp_last_cmd_auth_login_user; } } else if (cpriv->last_cmd == analyzer_smtp_last_cmd_auth_login_user) { char *password = NULL; size_t out_len = 0; struct ptype *password_pt = NULL; if (decoder_decode_simple("base64", cmd, strlen(cmd), &password, &out_len) == POM_OK) { password_pt = ptype_alloc("string"); if (password_pt) { PTYPE_STRING_SETVAL_P(password_pt, password); struct data *auth_data = event_get_data(cpriv->evt_auth); if (data_item_add_ptype(auth_data, analyzer_smtp_auth_params, strdup("password"), password_pt) != POM_OK) { ptype_cleanup(password_pt); event_process_end(cpriv->evt_auth); cpriv->evt_auth = NULL; password_pt = NULL; } } else { free(password); } } if (!password_pt) { cpriv->last_cmd = analyzer_smtp_last_cmd_other; } else { cpriv->last_cmd = analyzer_smtp_last_cmd_auth_login_pass; } } else { cpriv->last_cmd = analyzer_smtp_last_cmd_other; } } else if (evt_reg == apriv->evt_reply) { if (!cpriv->common_data_fetched) analyzer_smtp_event_fetch_common_data(cpriv, stack, stack_index, s->direction); // Process replies uint16_t code = *PTYPE_UINT16_GETVAL(evt_data[proto_smtp_reply_code].value); switch (cpriv->last_cmd) { default: case analyzer_smtp_last_cmd_other: if (code == 220 && evt_data[proto_smtp_reply_text].items && evt_data[proto_smtp_reply_text].items->value) { // STARTTLS returns 220 as well so ignore extra code 220 if (!cpriv->server_hello) { char *helo = PTYPE_STRING_GETVAL(evt_data[proto_smtp_reply_text].items->value); cpriv->server_hello = strdup(helo); if (!cpriv->server_hello) { pom_oom(strlen(helo) + 1); return POM_ERR; } } } break; case analyzer_smtp_last_cmd_mail_from: if (code != 250) { // FROM is invalid data_unset(msg_data[analyzer_smtp_msg_from]); } break; case analyzer_smtp_last_cmd_rcpt_to: // For now just don't do anything // It's best to keep a destination in there even if it's invalid or denied break; case analyzer_smtp_last_cmd_data: if (code == 354) { // The message is starting, keep last_cmd intact return POM_OK; } // Message is over (if ever transmited) if (event_is_started(cpriv->evt_msg)) { struct data *msg_data = event_get_data(cpriv->evt_msg); PTYPE_UINT16_SETVAL(msg_data[analyzer_smtp_msg_result].value, code); data_set(msg_data[analyzer_smtp_msg_result]); event_process_end(cpriv->evt_msg); cpriv->evt_msg = NULL; } break; case analyzer_smtp_last_cmd_auth_plain: case analyzer_smtp_last_cmd_auth_login: case analyzer_smtp_last_cmd_auth_login_user: // Check if authentication phase can continue if (code == 334) { // Don't reset cpriv->last_cmd return POM_OK; } else { struct data *evt_data = event_get_data(cpriv->evt_auth); PTYPE_BOOL_SETVAL(evt_data[analyzer_smtp_auth_success].value, 0); data_set(evt_data[analyzer_smtp_auth_success]); event_process_end(cpriv->evt_auth); cpriv->evt_auth = NULL; } break; case analyzer_smtp_last_cmd_auth_plain_creds: case analyzer_smtp_last_cmd_auth_login_pass: { // We just processed the credentials struct data *auth_data = event_get_data(cpriv->evt_auth); char success = 0; if (code == 235) success = 1; PTYPE_BOOL_SETVAL(auth_data[analyzer_smtp_auth_success].value, success); data_set(auth_data[analyzer_smtp_auth_success]); event_process_end(cpriv->evt_auth); cpriv->evt_auth = NULL; break; } } cpriv->last_cmd = analyzer_smtp_last_cmd_other; } return POM_OK; }
static int analyzer_smtp_parse_auth_plain(struct analyzer_smtp_priv *apriv, struct analyzer_smtp_ce_priv *cpriv, char *auth_plain) { // Parse SASL AUTH PLAIN as described in RFC 4616 // The decoded arg must be at least 3 bytes if (strlen(auth_plain) < 4 || memchr(auth_plain, '=', 4)) { pomlog(POMLOG_DEBUG "AUTH PLAIN argument too short"); return POM_OK; } // Allocate the event cpriv->evt_auth = event_alloc(apriv->evt_auth); if (!cpriv->evt_auth) return POM_ERR; struct data *evt_data = event_get_data(cpriv->evt_auth); analyzer_smtp_event_fill_common_data(cpriv, evt_data); // Set the authentication type PTYPE_STRING_SETVAL(evt_data[analyzer_smtp_auth_type].value, "PLAIN"); data_set(evt_data[analyzer_smtp_auth_type]); // Parse the authentication stuff char *creds_str = NULL; size_t out_len = 0; if (decoder_decode_simple("base64", auth_plain, strlen(auth_plain), &creds_str, &out_len) != POM_OK) { pomlog(POMLOG_DEBUG "Unable to decode AUTH PLAIN message"); return POM_OK; } if (out_len < 3) { pomlog(POMLOG_DEBUG "Invalid decoded AUTH PLAIN data"); return POM_OK; } char *tmp = creds_str; // Add the identity if (strlen(tmp)) { // SASL AUTH PLAIN specifies struct ptype *identity = ptype_alloc("string"); if (!identity) goto err; PTYPE_STRING_SETVAL(identity, tmp); if (data_item_add_ptype(evt_data, analyzer_smtp_auth_params, strdup("identity"), identity) != POM_OK) { ptype_cleanup(identity); goto err; } } tmp += strlen(tmp) + 1; // Add the username struct ptype *username = ptype_alloc("string"); if (!username) goto err; PTYPE_STRING_SETVAL(username, tmp); if (data_item_add_ptype(evt_data, analyzer_smtp_auth_params, strdup("username"), username) != POM_OK) { ptype_cleanup(username); goto err; } tmp += strlen(tmp) + 1; // Add the password struct ptype *password = ptype_alloc("string"); if (!password) goto err; PTYPE_STRING_SETVAL(password, tmp); if (data_item_add_ptype(evt_data, analyzer_smtp_auth_params, strdup("password"), password) != POM_OK) { ptype_cleanup(password); goto err; } free(creds_str); return POM_OK; err: event_cleanup(cpriv->evt_auth); cpriv->evt_auth = NULL; free(creds_str); return POM_ERR; }
static int proto_smtp_process(void *proto_priv, struct packet *p, struct proto_process_stack *stack, unsigned int stack_index) { struct proto_process_stack *s = &stack[stack_index]; struct proto_process_stack *s_next = &stack[stack_index + 1]; if (conntrack_get_unique_from_parent(stack, stack_index) != POM_OK) { pomlog(POMLOG_ERR "Could not get conntrack entry"); return PROTO_ERR; } // There should no need to keep the lock here since we are in the packet_stream lock from proto_tcp conntrack_unlock(s->ce); struct proto_smtp_priv *ppriv = proto_priv; struct proto_smtp_conntrack_priv *priv = s->ce->priv; if (!priv) { priv = malloc(sizeof(struct proto_smtp_conntrack_priv)); if (!priv) { pom_oom(sizeof(struct proto_smtp_conntrack_priv)); return PROTO_ERR; } memset(priv, 0, sizeof(struct proto_smtp_conntrack_priv)); priv->parser[POM_DIR_FWD] = packet_stream_parser_alloc(SMTP_MAX_LINE, PACKET_STREAM_PARSER_FLAG_TRIM); if (!priv->parser[POM_DIR_FWD]) { free(priv); return PROTO_ERR; } priv->parser[POM_DIR_REV] = packet_stream_parser_alloc(SMTP_MAX_LINE, PACKET_STREAM_PARSER_FLAG_TRIM); if (!priv->parser[POM_DIR_REV]) { packet_stream_parser_cleanup(priv->parser[POM_DIR_FWD]); free(priv); return PROTO_ERR; } priv->server_direction = POM_DIR_UNK; s->ce->priv = priv; } if (priv->flags & PROTO_SMTP_FLAG_INVALID) return PROTO_OK; struct packet_stream_parser *parser = priv->parser[s->direction]; if (packet_stream_parser_add_payload(parser, s->pload, s->plen) != POM_OK) return PROTO_ERR; char *line = NULL; size_t len = 0; while (1) { // Some check to do prior to parse the payload if (s->direction == POM_DIR_REVERSE(priv->server_direction)) { if (priv->flags & PROTO_SMTP_FLAG_STARTTLS) { // Last command was a STARTTLS command, this is the TLS negociation // Since we can't parse this, mark it as invalid priv->flags |= PROTO_SMTP_FLAG_INVALID; return PROTO_OK; } else if (priv->flags & PROTO_SMTP_FLAG_CLIENT_DATA) { // We are receiving payload data, check where the end is void *pload; size_t plen; packet_stream_parser_get_remaining(parser, &pload, &plen); if (!plen) return PROTO_OK; // Look for the "<CR><LF>.<CR><LF>" sequence if (priv->data_end_pos > 0) { // The previous packet ended with something that might be the final sequence // Check if we have the rest int i, found = 1; for (i = 0; i < PROTO_SMTP_DATA_END_LEN - priv->data_end_pos && i <= plen; i++) { if (*(char*)(pload + i) != PROTO_SMTP_DATA_END[priv->data_end_pos + i]) { found = 0; break; } } if (found) { // If we have already processed the dot after <CR><LF> there is no way to remove it // Thus we mark this connection as invalid. Most MTA will send at worst the last // 3 bytes of the end sequence in a sequence packet if (i != plen || (priv->data_end_pos >= 2 && plen < 3)) { pomlog(POMLOG_DEBUG "The final line was not at the of a packet as expected !"); priv->flags |= PROTO_SMTP_FLAG_INVALID; event_process_end(priv->data_evt); priv->data_evt = NULL; return PROTO_OK; } s_next->pload = pload; s_next->plen = plen - PROTO_SMTP_DATA_END_LEN + 2; // The last line return is part of the payload priv->flags |= PROTO_SMTP_FLAG_CLIENT_DATA_END; priv->flags &= ~PROTO_SMTP_FLAG_CLIENT_DATA; priv->data_end_pos = 0; return PROTO_OK; } priv->data_end_pos = 0; } char *dotline = pom_strnstr(pload, PROTO_SMTP_DATA_END, plen); if (dotline) { if (pload + plen - PROTO_SMTP_DATA_END_LEN != dotline) { pomlog(POMLOG_DEBUG "The final line was not at the of a packet as expected !"); priv->flags |= PROTO_SMTP_FLAG_INVALID; event_process_end(priv->data_evt); priv->data_evt = NULL; return PROTO_OK; } s_next->pload = pload; s_next->plen = plen - PROTO_SMTP_DATA_END_LEN + 2; // The last line return is part of the payload priv->flags |= PROTO_SMTP_FLAG_CLIENT_DATA_END; priv->flags &= ~PROTO_SMTP_FLAG_CLIENT_DATA; } else { // Check if the end of the payload contains part of the "<CR><LF>.<CR><LF>" sequence int i, found = 0; for (i = 1 ; (i < PROTO_SMTP_DATA_END_LEN) && (i <= plen); i++) { if (!memcmp(pload + plen - i, PROTO_SMTP_DATA_END, i)) { found = 1; break; } } if (found) priv->data_end_pos = i; s_next->pload = pload; s_next->plen = plen; } return PROTO_OK; } } // Process commands if (packet_stream_parser_get_line(parser, &line, &len) != POM_OK) return PROTO_ERR; if (!line) return PROTO_OK; if (!len) // Probably a missed packet return PROTO_OK; // Try to find the server direction if (priv->server_direction == POM_DIR_UNK) { unsigned int code = atoi(line); if (code > 0) { priv->server_direction = s->direction; } else { priv->server_direction = POM_DIR_REVERSE(s->direction); } } if (s->direction == priv->server_direction) { // Parse the response code and generate the event if ((len < 5) || // Server response is 3 digit error code, a space or hyphen and then at least one letter of text (line[3] != ' ' && line[3] != '-')) { pomlog(POMLOG_DEBUG "Too short or invalid response from server"); priv->flags |= PROTO_SMTP_FLAG_INVALID; return POM_OK; } int code = atoi(line); if (code == 0) { pomlog(POMLOG_DEBUG "Invalid response from server"); priv->flags |= PROTO_SMTP_FLAG_INVALID; return POM_OK; } if (event_has_listener(ppriv->evt_reply)) { struct data *evt_data = NULL; if (priv->reply_evt) { evt_data = event_get_data(priv->reply_evt); uint16_t cur_code = *PTYPE_UINT16_GETVAL(evt_data[proto_smtp_reply_code].value); if (cur_code != code) { pomlog(POMLOG_WARN "Multiline code not the same as previous line : %hu -> %hu", cur_code, code); event_process_end(priv->reply_evt); priv->reply_evt = NULL; } } if (!priv->reply_evt) { priv->reply_evt = event_alloc(ppriv->evt_reply); if (!priv->reply_evt) return PROTO_ERR; evt_data = event_get_data(priv->reply_evt); PTYPE_UINT16_SETVAL(evt_data[proto_smtp_reply_code].value, code); data_set(evt_data[proto_smtp_reply_code]); } if (len > 4) { struct ptype *txt = ptype_alloc("string"); if (!txt) return PROTO_ERR; PTYPE_STRING_SETVAL_N(txt, line + 4, len - 4); if (data_item_add_ptype(evt_data, proto_smtp_reply_text, strdup("text"), txt) != POM_OK) return PROTO_ERR; } if (!event_is_started(priv->reply_evt)) event_process_begin(priv->reply_evt, stack, stack_index, p->ts); } if (line[3] != '-') { // Last line in the response if (priv->reply_evt) { event_process_end(priv->reply_evt); priv->reply_evt = NULL; } } if (priv->flags & PROTO_SMTP_FLAG_STARTTLS) { // The last command was STARTTLS priv->flags &= ~PROTO_SMTP_FLAG_STARTTLS; if (code == 220) { // TLS has the go, we can't parse from now so mark as invalid priv->flags |= PROTO_SMTP_FLAG_INVALID; return POM_OK; } } } else { // Client command if (len < 4) { // Client commands are at least 4 bytes long pomlog(POMLOG_DEBUG "Too short or invalid query from client"); priv->flags |= PROTO_SMTP_FLAG_INVALID; return POM_OK; } // Make sure it's a command by checking it's at least a four letter word int i; for (i = 0; i < 4; i++) { // In some case it can also be a base64 encoded word if (! ((line[i] >= 'A' && line[i] <= 'Z') || (line[i] >= 'a' && line[i] <= 'z') || (line[i] >= '0' && line [i] <= '9') || line[i] == '=')) break; } if ((i < 4)) { pomlog(POMLOG_DEBUG "Recieved invalid client command"); priv->flags |= PROTO_SMTP_FLAG_INVALID; return POM_OK; } if (!strncasecmp(line, "DATA", strlen("DATA")) && len == strlen("DATA")) { priv->flags |= PROTO_SMTP_FLAG_CLIENT_DATA; } else if (!strncasecmp(line, "STARTTLS", strlen("STARTTLS")) && len == strlen("STARTTLS")) { priv->flags |= PROTO_SMTP_FLAG_STARTTLS; } if (event_has_listener(ppriv->evt_cmd)) { struct event *evt = event_alloc(ppriv->evt_cmd); if (!evt) return PROTO_ERR; size_t cmdlen = len; char *space = memchr(line, ' ', len); if (space) cmdlen = space - line; struct data *evt_data = event_get_data(evt); PTYPE_STRING_SETVAL_N(evt_data[proto_smtp_cmd_name].value, line, cmdlen); data_set(evt_data[proto_smtp_cmd_name]); if (space) { PTYPE_STRING_SETVAL_N(evt_data[proto_smtp_cmd_arg].value, space + 1, len - 1 - cmdlen); data_set(evt_data[proto_smtp_cmd_arg]); } if (priv->flags & PROTO_SMTP_FLAG_CLIENT_DATA) { // The event ends at the end of the message priv->data_evt = evt; return event_process_begin(evt, stack, stack_index, p->ts); } else { return event_process(evt, stack, stack_index, p->ts); } } } } return PROTO_OK; }
static void analyzer_jpeg_exif_entry_analyze(ExifEntry *entry, void *pload) { ExifIfd ifd = exif_content_get_ifd(entry->parent); const char *tag_name = exif_tag_get_name_in_ifd(entry->tag, ifd); if (!tag_name) // Unknown tag return; struct ptype *value = NULL; // First parse ascii values if (entry->format == EXIF_FORMAT_ASCII) { char *str = malloc(entry->size); if (!str) { pom_oom(entry->size); return; } memcpy(str, entry->data, entry->size); // Make sure it's NULL terminated str[entry->size - 1] = 0; value = ptype_alloc("string"); if (!value) { free(str); return; } PTYPE_STRING_SETVAL_P(value, str); } else if (entry->components == 1) { ExifByteOrder byte_order = exif_data_get_byte_order(entry->parent->parent); if (entry->format == EXIF_FORMAT_BYTE) { value = ptype_alloc("uint8"); if (!value) return; PTYPE_UINT8_SETVAL(value, *entry->data); } else if (entry->format == EXIF_FORMAT_SHORT) { value = ptype_alloc("uint16"); if (!value) return; PTYPE_UINT16_SETVAL(value, exif_get_short(entry->data, byte_order)); } else if (entry->format == EXIF_FORMAT_LONG) { value = ptype_alloc("uint32"); if (!value) return; PTYPE_UINT32_SETVAL(value, exif_get_long(entry->data, byte_order)); } } if (!value) { // Fallback for types not parsed by us yet // FIXME this is subject to the locale char buff[256]; buff[sizeof(buff) - 1] = 0; exif_entry_get_value(entry, buff, sizeof(buff) - 1); value = ptype_alloc("string"); if (!value) return; PTYPE_STRING_SETVAL(value, buff); } char *key = strdup(tag_name); if (!key) { pom_oom(strlen(tag_name) + 1); return; } struct data *data = analyzer_pload_buffer_get_data(pload); data_item_add_ptype(data, analyzer_jpeg_pload_exif, key, value); }