SilcBuffer silc_notify_payload_encode_args(SilcNotifyType type, SilcUInt32 argc, SilcBuffer args) { SilcBuffer buffer; SilcUInt32 len; len = 5 + (args ? silc_buffer_len(args) : 0); buffer = silc_buffer_alloc_size(len); if (!buffer) return NULL; silc_buffer_format(buffer, SILC_STR_UI_SHORT(type), SILC_STR_UI_SHORT(len), SILC_STR_UI_CHAR(argc), SILC_STR_END); if (args) silc_buffer_format(buffer, SILC_STR_OFFSET(5), SILC_STR_DATA(args->data, silc_buffer_len(args)), SILC_STR_END); return buffer; }
SilcBuffer silc_public_key_payload_encode(SilcPublicKey public_key) { SilcBuffer buffer; unsigned char *pk; SilcUInt32 pk_len; SilcPKCSType type; if (!public_key) return NULL; type = silc_pkcs_get_type(public_key); pk = silc_pkcs_public_key_encode(public_key, &pk_len); if (!pk) return NULL; buffer = silc_buffer_alloc_size(4 + pk_len); if (!buffer) { silc_free(pk); return NULL; } if (silc_buffer_format(buffer, SILC_STR_UI_SHORT(pk_len), SILC_STR_UI_SHORT(type), SILC_STR_DATA(pk, pk_len), SILC_STR_END) < 0) { silc_buffer_free(buffer); silc_free(pk); return NULL; } silc_free(pk); return buffer; }
void silcpurple_wb_send(PurpleWhiteboard *wb, GList *draw_list) { SilcPurpleWb wbs = wb->proto_data; SilcBuffer packet; GList *list; int len; PurpleConnection *gc; SilcPurple sg; g_return_if_fail(draw_list); gc = purple_account_get_connection(wb->account); g_return_if_fail(gc); sg = gc->proto_data; g_return_if_fail(sg); len = SILCPURPLE_WB_HEADER; for (list = draw_list; list; list = list->next) len += 4; packet = silc_buffer_alloc_size(len); if (!packet) return; /* Assmeble packet */ silc_buffer_format(packet, SILC_STR_UI32_STRING(SILCPURPLE_WB_MIME), SILC_STR_UI_CHAR(SILCPURPLE_WB_DRAW), SILC_STR_UI_SHORT(wbs->width), SILC_STR_UI_SHORT(wbs->height), SILC_STR_UI_INT(wbs->brush_color), SILC_STR_UI_SHORT(wbs->brush_size), SILC_STR_END); silc_buffer_pull(packet, SILCPURPLE_WB_HEADER); for (list = draw_list; list; list = list->next) { silc_buffer_format(packet, SILC_STR_UI_INT(GPOINTER_TO_INT(list->data)), SILC_STR_END); silc_buffer_pull(packet, 4); } /* Send the message */ if (wbs->type == 0) { /* Private message */ silc_client_send_private_message(sg->client, sg->conn, wbs->u.client, SILC_MESSAGE_FLAG_DATA, NULL, packet->head, len); } else if (wbs->type == 1) { /* Channel message. Channel private keys are not supported. */ silc_client_send_channel_message(sg->client, sg->conn, wbs->u.channel, NULL, SILC_MESSAGE_FLAG_DATA, NULL, packet->head, len); } silc_buffer_free(packet); }
SilcBuffer silc_command_payload_encode(SilcCommand cmd, SilcUInt32 argc, unsigned char **argv, SilcUInt32 *argv_lens, SilcUInt32 *argv_types, SilcUInt16 ident) { SilcBuffer buffer; SilcBuffer args = NULL; SilcUInt32 len = 0; SILC_LOG_DEBUG(("Encoding command payload")); if (argc) { args = silc_argument_payload_encode(argc, argv, argv_lens, argv_types); if (!args) return NULL; len = silc_buffer_len(args); } len += SILC_COMMAND_PAYLOAD_LEN; buffer = silc_buffer_alloc_size(len); if (!buffer) return NULL; /* Create Command payload */ silc_buffer_format(buffer, SILC_STR_UI_SHORT(len), SILC_STR_UI_CHAR(cmd), SILC_STR_UI_CHAR(argc), SILC_STR_UI_SHORT(ident), SILC_STR_END); /* Add arguments */ if (argc) { silc_buffer_pull(buffer, SILC_COMMAND_PAYLOAD_LEN); silc_buffer_format(buffer, SILC_STR_UI_XNSTRING(args->data, silc_buffer_len(args)), SILC_STR_END); silc_buffer_push(buffer, SILC_COMMAND_PAYLOAD_LEN); silc_buffer_free(args); } return buffer; }
void silcpurple_wb_clear(PurpleWhiteboard *wb) { SilcPurpleWb wbs = wb->proto_data; SilcBuffer packet; int len; PurpleConnection *gc; SilcPurple sg; gc = purple_account_get_connection(wb->account); g_return_if_fail(gc); sg = gc->proto_data; g_return_if_fail(sg); len = SILCPURPLE_WB_HEADER; packet = silc_buffer_alloc_size(len); if (!packet) return; /* Assmeble packet */ silc_buffer_format(packet, SILC_STR_UI32_STRING(SILCPURPLE_WB_MIME), SILC_STR_UI_CHAR(SILCPURPLE_WB_CLEAR), SILC_STR_UI_SHORT(wbs->width), SILC_STR_UI_SHORT(wbs->height), SILC_STR_UI_INT(wbs->brush_color), SILC_STR_UI_SHORT(wbs->brush_size), SILC_STR_END); /* Send the message */ if (wbs->type == 0) { /* Private message */ silc_client_send_private_message(sg->client, sg->conn, wbs->u.client, SILC_MESSAGE_FLAG_DATA, NULL, packet->head, len); } else if (wbs->type == 1) { /* Channel message */ silc_client_send_channel_message(sg->client, sg->conn, wbs->u.channel, NULL, SILC_MESSAGE_FLAG_DATA, NULL, packet->head, len); } silc_buffer_free(packet); }
SilcBuffer silc_command_payload_encode_payload(SilcCommandPayload payload) { SilcBuffer buffer; SilcBuffer args = NULL; SilcUInt32 len = 0; SilcUInt32 argc = 0; SILC_LOG_DEBUG(("Encoding command payload")); if (payload->args) { args = silc_argument_payload_encode_payload(payload->args); if (args) len = silc_buffer_len(args); argc = silc_argument_get_arg_num(payload->args); } len += SILC_COMMAND_PAYLOAD_LEN; buffer = silc_buffer_alloc_size(len); if (!buffer) { if (args) silc_buffer_free(args); return NULL; } /* Create Command payload */ silc_buffer_format(buffer, SILC_STR_UI_SHORT(len), SILC_STR_UI_CHAR(payload->cmd), SILC_STR_UI_CHAR(argc), SILC_STR_UI_SHORT(payload->ident), SILC_STR_END); /* Add arguments */ if (args) { silc_buffer_pull(buffer, SILC_COMMAND_PAYLOAD_LEN); silc_buffer_format(buffer, SILC_STR_UI_XNSTRING(args->data, silc_buffer_len(args)), SILC_STR_END); silc_buffer_push(buffer, SILC_COMMAND_PAYLOAD_LEN); silc_buffer_free(args); } return buffer; }
static SilcBool silc_connauth_get_signature(SilcConnAuth connauth, unsigned char **auth_data, SilcUInt32 *auth_data_len) { int len; SilcSKE ske; SilcPrivateKey private_key; SilcBuffer auth; SILC_LOG_DEBUG(("Compute signature")); ske = connauth->ske; private_key = connauth->auth_data; /* Make the authentication data. Protocol says it is HASH plus KE Start Payload. */ len = ske->hash_len + silc_buffer_len(ske->start_payload_copy); auth = silc_buffer_alloc_size(len); if (!auth) return FALSE; silc_buffer_format(auth, SILC_STR_UI_XNSTRING(ske->hash, ske->hash_len), SILC_STR_UI_XNSTRING( ske->start_payload_copy->data, silc_buffer_len(ske->start_payload_copy)), SILC_STR_END); len = ((silc_pkcs_private_key_get_len(private_key) + 7) / 8) + 1; *auth_data = silc_calloc(len, sizeof(**auth_data)); if (*auth_data == NULL) { silc_buffer_free(auth); return FALSE; } /* Compute signature */ if (!silc_pkcs_sign(private_key, auth->data, silc_buffer_len(auth), *auth_data, len, auth_data_len, TRUE, ske->prop->hash)) { silc_free(*auth_data); silc_buffer_free(auth); return FALSE; } silc_buffer_free(auth); return TRUE; }
static SilcBool silc_connauth_verify_signature(SilcConnAuth connauth, SilcPublicKey pub_key, unsigned char *sign, SilcUInt32 sign_len) { int len; SilcBuffer auth; SilcSKE ske = connauth->ske; if (!pub_key || !sign) return FALSE; /* Make the authentication data. Protocol says it is HASH plus KE Start Payload. */ len = ske->hash_len + silc_buffer_len(ske->start_payload_copy); auth = silc_buffer_alloc_size(len); if (!auth) return FALSE; silc_buffer_format(auth, SILC_STR_UI_XNSTRING(ske->hash, ske->hash_len), SILC_STR_UI_XNSTRING( ske->start_payload_copy->data, silc_buffer_len(ske->start_payload_copy)), SILC_STR_END); /* Verify signature */ if (!silc_pkcs_verify(pub_key, sign, sign_len, auth->data, silc_buffer_len(auth), ske->prop->hash)) { silc_buffer_free(auth); return FALSE; } silc_buffer_free(auth); return TRUE; }
static unsigned char * silc_attribute_payload_encode_int(SilcAttribute attribute, SilcAttributeFlags flags, void *object, SilcUInt32 object_size, SilcUInt32 *ret_len) { SilcBuffer tmpbuf = NULL; unsigned char tmp[4], *str = NULL, *ret; SilcUInt32 len; /* Encode according to attribute type */ if (flags & SILC_ATTRIBUTE_FLAG_VALID) { if (!object && !object_size) return NULL; switch (attribute) { case SILC_ATTRIBUTE_USER_INFO: { SilcVCard vcard = object; if (object_size != sizeof(*vcard)) return NULL; str = silc_vcard_encode(vcard, &object_size); if (!str) return NULL; object = str; } break; case SILC_ATTRIBUTE_SERVICE: { SilcAttributeObjService *service = object; SilcUInt32 len2; if (object_size != sizeof(*service)) return NULL; len = strlen(service->address); len2 = strlen(service->signon); tmpbuf = silc_buffer_alloc_size(13 + len + len2); if (!tmpbuf) return NULL; silc_buffer_format(tmpbuf, SILC_STR_UI_INT(service->port), SILC_STR_UI_SHORT(len), SILC_STR_UI_XNSTRING(service->address, len), SILC_STR_UI_CHAR(service->status), SILC_STR_UI_SHORT(len2), SILC_STR_UI_XNSTRING(service->signon, len2), SILC_STR_UI_INT(service->idle), SILC_STR_END); object = tmpbuf->data; object_size = silc_buffer_len(tmpbuf); } break; case SILC_ATTRIBUTE_STATUS_MOOD: case SILC_ATTRIBUTE_PREFERRED_CONTACT: { SilcUInt32 mask = SILC_PTR_TO_32(object); if (object_size != sizeof(SilcUInt32)) return NULL; SILC_PUT32_MSB(mask, tmp); object = tmp; object_size = sizeof(SilcUInt32); } break; case SILC_ATTRIBUTE_STATUS_FREETEXT: case SILC_ATTRIBUTE_PREFERRED_LANGUAGE: case SILC_ATTRIBUTE_TIMEZONE: { unsigned char *string = object; str = silc_malloc(2 + object_size); if (!str) return NULL; SILC_PUT16_MSB(object_size, str); memcpy(str + 2, string, object_size); object = str; object_size += 2; } break; case SILC_ATTRIBUTE_STATUS_MESSAGE: case SILC_ATTRIBUTE_EXTENSION: case SILC_ATTRIBUTE_USER_ICON: { SilcMime mime = object; if (object_size != sizeof(*mime)) return NULL; str = silc_mime_encode(mime, &object_size); if (!str) return NULL; object = str; } break; case SILC_ATTRIBUTE_GEOLOCATION: { SilcAttributeObjGeo *geo = object; SilcUInt32 len1, len2, len3, len4; if (object_size != sizeof(*geo)) return NULL; len1 = (geo->longitude ? strlen(geo->longitude) : 0); len2 = (geo->latitude ? strlen(geo->latitude) : 0); len3 = (geo->altitude ? strlen(geo->altitude) : 0); len4 = (geo->accuracy ? strlen(geo->accuracy) : 0); if (len1 + len2 + len3 + len4 == 0) return NULL; len = len1 + len2 + len3 + len4; tmpbuf = silc_buffer_alloc_size(8 + len); if (!tmpbuf) return NULL; silc_buffer_format(tmpbuf, SILC_STR_UI_SHORT(len1), SILC_STR_UI16_STRING(len1 ? geo->longitude : ""), SILC_STR_UI_SHORT(len2), SILC_STR_UI16_STRING(len2 ? geo->latitude : ""), SILC_STR_UI_SHORT(len3), SILC_STR_UI16_STRING(len3 ? geo->altitude : ""), SILC_STR_UI_SHORT(len4), SILC_STR_UI16_STRING(len4 ? geo->accuracy : ""), SILC_STR_END); object = tmpbuf->data; object_size = silc_buffer_len(tmpbuf); } break; case SILC_ATTRIBUTE_DEVICE_INFO: { SilcAttributeObjDevice *dev = object; SilcUInt32 len1, len2, len3, len4; if (object_size != sizeof(*dev)) return NULL; len1 = (dev->manufacturer ? strlen(dev->manufacturer) : 0); len2 = (dev->version ? strlen(dev->version) : 0); len3 = (dev->model ? strlen(dev->model) : 0); len4 = (dev->language ? strlen(dev->language) : 0); if (len1 + len2 + len3 + len4 == 0) return NULL; len = len1 + len2 + len3 + len4; tmpbuf = silc_buffer_alloc_size(4 + 8 + len); if (!tmpbuf) return NULL; silc_buffer_format(tmpbuf, SILC_STR_UI_INT(dev->type), SILC_STR_UI_SHORT(len1), SILC_STR_UI16_STRING(len1 ? dev->manufacturer : ""), SILC_STR_UI_SHORT(len2), SILC_STR_UI16_STRING(len2 ? dev->version : ""), SILC_STR_UI_SHORT(len3), SILC_STR_UI16_STRING(len3 ? dev->model : ""), SILC_STR_UI_SHORT(len4), SILC_STR_UI16_STRING(len4 ? dev->language : ""), SILC_STR_END); object = tmpbuf->data; object_size = silc_buffer_len(tmpbuf); } break; case SILC_ATTRIBUTE_PHONE_NUMBER: { SilcAttributeObjPN *pn = object; if (object_size != sizeof(*pn)) return NULL; if (!pn->number || strlen(pn->number) < 5) return NULL; tmpbuf = silc_buffer_alloc(0); if (!tmpbuf) return NULL; if (silc_buffer_format(tmpbuf, SILC_STR_UI_INT(pn->format), SILC_STR_UI_SHORT(strlen(pn->number)), SILC_STR_UI16_STRING(pn->number), SILC_STR_END) < 0) return NULL; object = tmpbuf->data; object_size = silc_buffer_len(tmpbuf); } break; case SILC_ATTRIBUTE_USER_PUBLIC_KEY: case SILC_ATTRIBUTE_SERVER_PUBLIC_KEY: { SilcAttributeObjPk *pk = object; if (object_size != sizeof(*pk)) return NULL; len = (pk->type ? strlen(pk->type) : 0); tmpbuf = silc_buffer_alloc_size(2 + len + pk->data_len); if (!tmpbuf) return NULL; silc_buffer_format(tmpbuf, SILC_STR_UI_SHORT(len), SILC_STR_UI16_STRING(pk->type), SILC_STR_UI_XNSTRING(pk->data, pk->data_len), SILC_STR_END); object = tmpbuf->data; object_size = silc_buffer_len(tmpbuf); } break; case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE: case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE: { SilcAttributeObjPk *pk = object; if (object_size != sizeof(*pk)) return NULL; object = pk->data; object_size = pk->data_len; } break; default: return NULL; break; } ret = silc_memdup(object, object_size); if (tmpbuf) silc_buffer_free(tmpbuf); silc_free(str); if (ret_len) *ret_len = object_size; return ret; } return NULL; }
SilcBuffer silc_notify_payload_encode(SilcNotifyType type, SilcUInt32 argc, va_list ap) { SilcBuffer buffer; SilcBuffer args = NULL; unsigned char **argv; SilcUInt32 *argv_lens = NULL, *argv_types = NULL; unsigned char *x; SilcUInt32 x_len, len = 0; int i, k = 0; if (argc) { argv = silc_calloc(argc, sizeof(unsigned char *)); if (!argv) return NULL; argv_lens = silc_calloc(argc, sizeof(SilcUInt32)); if (!argv_lens) { silc_free(argv); return NULL; } argv_types = silc_calloc(argc, sizeof(SilcUInt32)); if (!argv_types) { silc_free(argv_lens); silc_free(argv); return NULL; } for (i = 0, k = 0; i < argc; i++) { x = va_arg(ap, unsigned char *); x_len = va_arg(ap, SilcUInt32); if (!x || !x_len) continue; argv[k] = silc_memdup(x, x_len); if (!argv[k]) return NULL; argv_lens[k] = x_len; argv_types[k] = i + 1; k++; } args = silc_argument_payload_encode(k, argv, argv_lens, argv_types); len = silc_buffer_len(args); for (i = 0; i < k; i++) silc_free(argv[i]); silc_free(argv); silc_free(argv_lens); silc_free(argv_types); } len += 5; buffer = silc_buffer_alloc_size(len); if (!buffer) return NULL; silc_buffer_format(buffer, SILC_STR_UI_SHORT(type), SILC_STR_UI_SHORT(len), SILC_STR_UI_CHAR(k), SILC_STR_END); if (k) { silc_buffer_format(buffer, SILC_STR_OFFSET(5), SILC_STR_DATA(args->data, silc_buffer_len(args)), SILC_STR_END); silc_buffer_free(args); } return buffer; }
SilcBuffer silc_sftp_attr_encode(SilcSFTPAttributes attr) { SilcBuffer buffer; int i, ret; SilcUInt32 len = 4; if (attr->flags & SILC_SFTP_ATTR_SIZE) len += 8; if (attr->flags & SILC_SFTP_ATTR_UIDGID) len += 8; if (attr->flags & SILC_SFTP_ATTR_PERMISSIONS) len += 4; if (attr->flags & SILC_SFTP_ATTR_ACMODTIME) len += 8; if (attr->flags & SILC_SFTP_ATTR_EXTENDED) { len += 4; for (i = 0; i < attr->extended_count; i++) { len += 8; len += silc_buffer_len(attr->extended_type[i]); len += silc_buffer_len(attr->extended_data[i]); } } buffer = silc_buffer_alloc_size(len); if (!buffer) return NULL; silc_buffer_format(buffer, SILC_STR_UI_INT(attr->flags), SILC_STR_END); silc_buffer_pull(buffer, 4); if (attr->flags & SILC_SFTP_ATTR_SIZE) { silc_buffer_format(buffer, SILC_STR_UI_INT64(attr->size), SILC_STR_END); silc_buffer_pull(buffer, 8); } if (attr->flags & SILC_SFTP_ATTR_UIDGID) { silc_buffer_format(buffer, SILC_STR_UI_INT(attr->uid), SILC_STR_UI_INT(attr->gid), SILC_STR_END); silc_buffer_pull(buffer, 8); } if (attr->flags & SILC_SFTP_ATTR_PERMISSIONS) { silc_buffer_format(buffer, SILC_STR_UI_INT(attr->permissions), SILC_STR_END); silc_buffer_pull(buffer, 4); } if (attr->flags & SILC_SFTP_ATTR_ACMODTIME) { silc_buffer_format(buffer, SILC_STR_UI_INT(attr->atime), SILC_STR_UI_INT(attr->mtime), SILC_STR_END); silc_buffer_pull(buffer, 8); } if (attr->flags & SILC_SFTP_ATTR_EXTENDED) { silc_buffer_format(buffer, SILC_STR_UI_INT(attr->extended_count), SILC_STR_END); silc_buffer_pull(buffer, 4); for (i = 0; i < attr->extended_count; i++) { ret = silc_buffer_format( buffer, SILC_STR_UI_INT(silc_buffer_len(attr->extended_type[i])), SILC_STR_DATA(silc_buffer_data(attr->extended_type[i]), silc_buffer_len(attr->extended_type[i])), SILC_STR_UI_INT(silc_buffer_len(attr->extended_data[i])), SILC_STR_DATA(silc_buffer_data(attr->extended_data[i]), silc_buffer_len(attr->extended_data[i])), SILC_STR_END); silc_buffer_pull(buffer, ret); } } silc_buffer_push(buffer, buffer->data - buffer->head); return buffer; }
SilcDList silc_mime_encode_partial(SilcMime mime, int max_size) { unsigned char *buf, *tmp; SilcUInt32 buf_len, len, tmp_len, off; SilcDList list; SilcBuffer buffer; SilcMime partial; char type[128], id[64]; int num; SILC_LOG_DEBUG(("Fragmenting MIME message")); /* Encode as normal */ buf = silc_mime_encode(mime, &buf_len); if (!buf) return NULL; list = silc_dlist_init(); /* Fragment if it is too large */ if (buf_len > max_size) { memset(id, 0, sizeof(id)); memset(type, 0, sizeof(type)); gethostname(type, sizeof(type) - 1); srand((time(NULL) + buf_len) ^ rand()); silc_snprintf(id, sizeof(id) - 1, "%X%X%X%s", (unsigned int)rand(), (unsigned int)time(NULL), (unsigned int)buf_len, type); SILC_LOG_DEBUG(("Fragment ID %s", id)); partial = silc_mime_alloc(); if (!partial) return NULL; silc_mime_add_field(partial, "MIME-Version", "1.0"); memset(type, 0, sizeof(type)); silc_snprintf(type, sizeof(type) - 1, "message/partial; id=\"%s\"; number=1", id); silc_mime_add_field(partial, "Content-Type", type); silc_mime_add_data(partial, buf, max_size); tmp = silc_mime_encode(partial, &tmp_len); if (!tmp) return NULL; silc_mime_free(partial); /* Add to list */ buffer = silc_buffer_alloc_size(tmp_len); if (!buffer) return NULL; silc_buffer_put(buffer, tmp, tmp_len); silc_dlist_add(list, buffer); silc_free(tmp); len = buf_len - max_size; off = max_size; num = 2; while (len > 0) { partial = silc_mime_alloc(); if (!partial) return NULL; memset(type, 0, sizeof(type)); silc_mime_add_field(partial, "MIME-Version", "1.0"); if (len > max_size) { silc_snprintf(type, sizeof(type) - 1, "message/partial; id=\"%s\"; number=%d", id, num++); silc_mime_add_data(partial, buf + off, max_size); off += max_size; len -= max_size; } else { silc_snprintf(type, sizeof(type) - 1, "message/partial; id=\"%s\"; number=%d; total=%d", id, num, num); silc_mime_add_data(partial, buf + off, len); len = 0; } silc_mime_add_field(partial, "Content-Type", type); tmp = silc_mime_encode(partial, &tmp_len); if (!tmp) return NULL; silc_mime_free(partial); /* Add to list */ buffer = silc_buffer_alloc_size(tmp_len); if (!buffer) return NULL; silc_buffer_put(buffer, tmp, tmp_len); silc_dlist_add(list, buffer); silc_free(tmp); } } else { /* No need to fragment */ buffer = silc_buffer_alloc_size(buf_len); if (!buffer) return NULL; silc_buffer_put(buffer, buf, buf_len); silc_dlist_add(list, buffer); } silc_free(buf); return list; }
SilcMime silc_mime_assemble(SilcMimeAssembler assembler, SilcMime partial) { char *type, *id = NULL, *tmp; SilcHashTable f; SilcMime p, complete; int i, number, total = -1; const unsigned char *data; SilcUInt32 data_len; SilcBuffer compbuf = NULL; SILC_LOG_DEBUG(("Assembling MIME fragments")); if (!assembler || !partial) goto err; type = (char *)silc_mime_get_field(partial, "Content-Type"); if (!type) goto err; /* Get ID */ tmp = strstr(type, "id="); if (!tmp) goto err; if (strlen(tmp) <= 4) goto err; tmp += 3; if (*tmp == '"') tmp++; id = strdup(tmp); if (strchr(id, ';')) *strchr(id, ';') = '\0'; if (strrchr(id, '"')) *strrchr(id, '"') = '\0'; SILC_LOG_DEBUG(("Fragment ID %s", id)); /* Get fragment number */ tmp = strstr(type, "number="); if (!tmp) goto err; tmp = strchr(tmp, '='); if (strlen(tmp) < 2) goto err; tmp++; if (strchr(tmp, ';')) { tmp = strdup(tmp); *strchr(tmp, ';') = '\0'; number = atoi(tmp); silc_free(tmp); } else { number = atoi(tmp); } SILC_LOG_DEBUG(("Fragment number %d", number)); /* Find fragments with this ID. */ if (!silc_hash_table_find(assembler->fragments, (void *)id, NULL, (void *)&f)) { /* This is new fragment to new message. Add to hash table and return. */ f = silc_hash_table_alloc(0, silc_hash_uint, NULL, NULL, NULL, silc_mime_assemble_dest, NULL, TRUE); if (!f) goto err; silc_hash_table_add(f, SILC_32_TO_PTR(number), partial); silc_hash_table_add(assembler->fragments, id, f); return NULL; } /* Try to get total number */ tmp = strstr(type, "total="); if (tmp) { tmp = strchr(tmp, '='); if (strlen(tmp) < 2) goto err; tmp++; if (strchr(tmp, ';')) { tmp = strdup(tmp); *strchr(tmp, ';') = '\0'; total = atoi(tmp); silc_free(tmp); } else { total = atoi(tmp); } SILC_LOG_DEBUG(("Fragment total %d", total)); } /* If more fragments to come, add to hash table */ if (number != total) { silc_hash_table_add(f, SILC_32_TO_PTR(number), partial); return NULL; } silc_hash_table_add(f, SILC_32_TO_PTR(number), partial); /* Verify that we really have all the fragments */ if (silc_hash_table_count(f) < total) return NULL; /* Assemble the complete MIME message now. We get them in order from the hash table. */ for (i = 1; i <= total; i++) { if (!silc_hash_table_find(f, SILC_32_TO_PTR(i), NULL, (void *)&p)) goto err; /* The fragment is in the data portion of the partial message */ data = silc_mime_get_data(p, &data_len); if (!data) goto err; /* Assemble */ if (!compbuf) { compbuf = silc_buffer_alloc_size(data_len); if (!compbuf) goto err; silc_buffer_put(compbuf, data, data_len); } else { compbuf = silc_buffer_realloc(compbuf, silc_buffer_truelen(compbuf) + data_len); if (!compbuf) goto err; silc_buffer_put_tail(compbuf, data, data_len); silc_buffer_pull_tail(compbuf, data_len); } } /* Now parse the complete MIME message and deliver it */ complete = silc_mime_decode(NULL, (const unsigned char *)compbuf->head, silc_buffer_truelen(compbuf)); if (!complete) goto err; /* Delete the hash table entry. Destructors will free memory */ silc_hash_table_del(assembler->fragments, (void *)id); silc_free(id); silc_buffer_free(compbuf); return complete; err: silc_free(id); if (compbuf) silc_buffer_free(compbuf); silc_mime_free(partial); return NULL; }
unsigned char *silc_mime_encode(SilcMime mime, SilcUInt32 *encoded_len) { SilcMime part; SilcHashTableList htl; SilcBufferStruct buf; SilcBuffer buffer; char *field, *value, tmp[1024], tmp2[4]; unsigned char *ret; int i; SILC_LOG_DEBUG(("Encoding MIME message")); if (!mime) return NULL; memset(&buf, 0, sizeof(buf)); /* Encode the headers. Order doesn't matter */ i = 0; silc_hash_table_list(mime->fields, &htl); while (silc_hash_table_get(&htl, (void *)&field, (void *)&value)) { memset(tmp, 0, sizeof(tmp)); SILC_LOG_DEBUG(("Header %s: %s", field, value)); silc_snprintf(tmp, sizeof(tmp) - 1, "%s: %s\r\n", field, value); silc_buffer_strformat(&buf, tmp, SILC_STRFMT_END); i++; } silc_hash_table_list_reset(&htl); if (i) silc_buffer_strformat(&buf, "\r\n", SILC_STRFMT_END); /* Assemble the whole buffer */ buffer = silc_buffer_alloc_size(mime->data_len + silc_buffer_len(&buf)); if (!buffer) return NULL; /* Add headers */ if (silc_buffer_len(&buf)) { silc_buffer_put(buffer, buf.head, silc_buffer_len(&buf)); silc_buffer_pull(buffer, silc_buffer_len(&buf)); silc_buffer_purge(&buf); } /* Add data */ if (mime->data) { SILC_LOG_DEBUG(("Data len %d", mime->data_len)); silc_buffer_put(buffer, mime->data, mime->data_len); } /* Add multiparts */ if (mime->multiparts) { SILC_LOG_DEBUG(("Encoding multiparts")); silc_dlist_start(mime->multiparts); i = 0; while ((part = silc_dlist_get(mime->multiparts)) != SILC_LIST_END) { unsigned char *pd; SilcUInt32 pd_len; /* Recursive encoding */ pd = silc_mime_encode(part, &pd_len); if (!pd) return NULL; memset(tmp, 0, sizeof(tmp)); memset(tmp2, 0, sizeof(tmp2)); /* If fields are not present, add extra CRLF */ if (!silc_hash_table_count(part->fields)) silc_snprintf(tmp2, sizeof(tmp2) - 1, "\r\n"); silc_snprintf(tmp, sizeof(tmp) - 1, "%s--%s\r\n%s", i != 0 ? "\r\n" : "", mime->boundary, tmp2); i = 1; buffer = silc_buffer_realloc(buffer, silc_buffer_truelen(buffer) + pd_len + strlen(tmp)); if (!buffer) return NULL; silc_buffer_put_tail(buffer, tmp, strlen(tmp)); silc_buffer_pull_tail(buffer, strlen(tmp)); silc_buffer_put_tail(buffer, pd, pd_len); silc_buffer_pull_tail(buffer, pd_len); silc_free(pd); } memset(tmp, 0, sizeof(tmp)); silc_snprintf(tmp, sizeof(tmp) - 1, "\r\n--%s--\r\n", mime->boundary); buffer = silc_buffer_realloc(buffer, silc_buffer_truelen(buffer) + strlen(tmp)); if (!buffer) return NULL; silc_buffer_put_tail(buffer, tmp, strlen(tmp)); silc_buffer_pull_tail(buffer, strlen(tmp)); } ret = silc_buffer_steal(buffer, encoded_len); silc_buffer_free(buffer); return ret; }