+++ /dev/null
-/*
-
- silcargument.c
-
- Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 2001 - 2007 Pekka Riikonen
-
- 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; version 2 of the License.
-
- 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.
-
-*/
-/* Implementation of Argument Payload routines */
-/* $Id$ */
-
-#include "silc.h"
-#include "silcargument.h"
-
-/*************************** Argument Payload *******************************/
-
-struct SilcArgumentPayloadStruct {
- SilcUInt32 argc;
- unsigned char **argv;
- SilcUInt32 *argv_lens;
- SilcUInt32 *argv_types;
- SilcUInt32 pos;
-};
-
-/* Parses arguments and returns them into Argument Payload structure. */
-
-SilcArgumentPayload silc_argument_payload_parse(const unsigned char *payload,
- SilcUInt32 payload_len,
- SilcUInt32 argc)
-{
- SilcBufferStruct buffer;
- SilcArgumentPayload newp;
- SilcUInt16 p_len = 0;
- unsigned char arg_num = 0;
- unsigned char arg_type = 0;
- SilcUInt32 pull_len = 0;
- int i = 0, ret;
-
- silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
- newp = silc_calloc(1, sizeof(*newp));
- if (!newp)
- return NULL;
- newp->argv = silc_calloc(argc, sizeof(unsigned char *));
- if (!newp->argv)
- goto err;
- newp->argv_lens = silc_calloc(argc, sizeof(SilcUInt32));
- if (!newp->argv_lens)
- goto err;
- newp->argv_types = silc_calloc(argc, sizeof(SilcUInt32));
- if (!newp->argv_types)
- goto err;
-
- /* Get arguments */
- arg_num = 1;
- for (i = 0; i < argc; i++) {
- ret = silc_buffer_unformat(&buffer,
- SILC_STR_UI_SHORT(&p_len),
- SILC_STR_UI_CHAR(&arg_type),
- SILC_STR_END);
- if (ret == -1 || p_len > silc_buffer_len(&buffer) - 3) {
- SILC_LOG_DEBUG(("Malformed argument payload"));
- goto err;
- }
-
- newp->argv_lens[i] = p_len;
- newp->argv_types[i] = arg_type;
-
- /* Get argument data */
- silc_buffer_pull(&buffer, 3);
- ret = silc_buffer_unformat(&buffer,
- SILC_STR_UI_XNSTRING_ALLOC(&newp->argv[i],
- p_len),
- SILC_STR_END);
- if (ret == -1) {
- SILC_LOG_DEBUG(("Malformed argument payload"));
- goto err;
- }
-
- silc_buffer_pull(&buffer, p_len);
- pull_len += 3 + p_len;
- }
-
- if (silc_buffer_len(&buffer) != 0) {
- SILC_LOG_DEBUG(("Malformed argument payload"));
- goto err;
- }
-
- newp->argc = argc;
- newp->pos = 0;
-
- silc_buffer_push(&buffer, pull_len);
-
- return newp;
-
- err:
- SILC_LOG_DEBUG(("Error parsing argument payload"));
- if (i)
- for (ret = 0; ret < i; ret++)
- silc_free(newp->argv[ret]);
-
- silc_free(newp->argv);
- silc_free(newp->argv_lens);
- silc_free(newp->argv_types);
- silc_free(newp);
-
- return NULL;
-}
-
-/* Encodes arguments in to Argument Paylods returning them to SilcBuffer. */
-
-SilcBuffer silc_argument_payload_encode(SilcUInt32 argc,
- unsigned char **argv,
- SilcUInt32 *argv_lens,
- SilcUInt32 *argv_types)
-{
- SilcBuffer buffer;
- SilcUInt32 len;
- int i;
-
- len = 0;
- for (i = 0; i < argc; i++)
- len += 3 + (SilcUInt16)argv_lens[i];
-
- buffer = silc_buffer_alloc_size(len);
- if (!buffer)
- return NULL;
-
- /* Put arguments */
- for (i = 0; i < argc; i++) {
- silc_buffer_format(buffer,
- SILC_STR_UI_SHORT(argv_lens[i]),
- SILC_STR_UI_CHAR(argv_types[i]),
- SILC_STR_UI_XNSTRING(argv[i], (SilcUInt16)argv_lens[i]),
- SILC_STR_END);
- silc_buffer_pull(buffer, 3 + (SilcUInt16)argv_lens[i]);
- }
-
- silc_buffer_push(buffer, len);
-
- return buffer;
-}
-
-/* Encode one argument to buffer */
-
-SilcBuffer silc_argument_payload_encode_one(SilcBuffer args,
- unsigned char *arg,
- SilcUInt32 arg_len,
- SilcUInt32 arg_type)
-{
- SilcBuffer buffer = args;
- SilcUInt32 len;
-
- len = 3 + (SilcUInt16)arg_len;
- buffer = silc_buffer_realloc(buffer,
- (buffer ? silc_buffer_truelen(buffer) +
- len : len));
- if (!buffer)
- return NULL;
- silc_buffer_pull(buffer, silc_buffer_len(buffer));
- silc_buffer_pull_tail(buffer, len);
- silc_buffer_format(buffer,
- SILC_STR_UI_SHORT(arg_len),
- SILC_STR_UI_CHAR(arg_type),
- SILC_STR_UI_XNSTRING(arg, (SilcUInt16)arg_len),
- SILC_STR_END);
- silc_buffer_push(buffer, buffer->data - buffer->head);
-
- return buffer;
-}
-
-/* Same as above but encode the buffer from SilcArgumentPayload structure
- instead of raw data. */
-
-SilcBuffer silc_argument_payload_encode_payload(SilcArgumentPayload payload)
-{
- SilcBuffer buffer;
- SilcUInt32 len;
- int i;
-
- len = 0;
- for (i = 0; i < payload->argc; i++)
- len += 3 + payload->argv_lens[i];
-
- buffer = silc_buffer_alloc_size(len);
- if (!buffer)
- return NULL;
-
- /* Put arguments */
- for (i = 0; i < payload->argc; i++) {
- silc_buffer_format(buffer,
- SILC_STR_UI_SHORT(payload->argv_lens[i]),
- SILC_STR_UI_CHAR(payload->argv_types[i]),
- SILC_STR_UI_XNSTRING(payload->argv[i],
- payload->argv_lens[i]),
- SILC_STR_END);
- silc_buffer_pull(buffer, 3 + payload->argv_lens[i]);
- }
-
- silc_buffer_push(buffer, len);
-
- return buffer;
-}
-
-/* Frees Argument Payload */
-
-void silc_argument_payload_free(SilcArgumentPayload payload)
-{
- int i;
-
- if (payload) {
- for (i = 0; i < payload->argc; i++)
- silc_free(payload->argv[i]);
-
- silc_free(payload->argv);
- silc_free(payload->argv_lens);
- silc_free(payload->argv_types);
- silc_free(payload);
- }
-}
-
-/* Returns number of arguments in payload */
-
-SilcUInt32 silc_argument_get_arg_num(SilcArgumentPayload payload)
-{
- return payload ? payload->argc : 0;
-}
-
-/* Returns first argument from payload. */
-
-unsigned char *silc_argument_get_first_arg(SilcArgumentPayload payload,
- SilcUInt32 *type,
- SilcUInt32 *ret_len)
-{
- if (!payload)
- return NULL;
-
- payload->pos = 0;
-
- if (type)
- *type = payload->argv_types[payload->pos];
- if (ret_len)
- *ret_len = payload->argv_lens[payload->pos];
-
- return payload->argv[payload->pos++];
-}
-
-/* Returns next argument from payload or NULL if no more arguments. */
-
-unsigned char *silc_argument_get_next_arg(SilcArgumentPayload payload,
- SilcUInt32 *type,
- SilcUInt32 *ret_len)
-{
- if (!payload)
- return NULL;
-
- if (payload->pos >= payload->argc)
- return NULL;
-
- if (type)
- *type = payload->argv_types[payload->pos];
- if (ret_len)
- *ret_len = payload->argv_lens[payload->pos];
-
- return payload->argv[payload->pos++];
-}
-
-/* Returns argument which type is `type'. */
-
-unsigned char *silc_argument_get_arg_type(SilcArgumentPayload payload,
- SilcUInt32 type,
- SilcUInt32 *ret_len)
-{
- int i;
-
- if (!payload)
- return NULL;
-
- for (i = 0; i < payload->argc; i++)
- if (payload->argv_types[i] == type)
- break;
-
- if (i >= payload->argc)
- return NULL;
-
- if (ret_len)
- *ret_len = payload->argv_lens[i];
-
- return payload->argv[i];
-}
-
-/* Return argument already decoded */
-
-static SilcBool silc_argument_decode(unsigned char *data,
- SilcUInt32 data_len,
- SilcArgumentDecodeType dec_type,
- void *ret_arg,
- void **ret_arg_alloc)
-{
- switch (dec_type) {
-
- case SILC_ARGUMENT_ID:
- if (ret_arg)
- if (!silc_id_payload_parse_id(data, data_len, (SilcID *)ret_arg))
- return FALSE;
-
- if (ret_arg_alloc) {
- SilcID id;
- if (!silc_id_payload_parse_id(data, data_len, &id))
- return FALSE;
- *ret_arg_alloc = silc_memdup(&id, sizeof(id));
- }
- break;
-
- case SILC_ARGUMENT_PUBLIC_KEY:
- {
- SilcPublicKey public_key;
-
- if (!ret_arg_alloc)
- return FALSE;
-
- if (!silc_public_key_payload_decode(data, data_len, &public_key))
- return FALSE;
-
- *ret_arg_alloc = public_key;
- }
- break;
-
- case SILC_ARGUMENT_ATTRIBUTES:
- if (!ret_arg_alloc)
- return FALSE;
-
- *ret_arg_alloc = silc_attribute_payload_parse(data, data_len);
- break;
-
- case SILC_ARGUMENT_UINT32:
- if (data_len != 4)
- return FALSE;
-
- if (ret_arg) {
- SilcUInt32 *i = ret_arg;
- SILC_GET32_MSB(*i, data);
- }
-
- if (ret_arg_alloc) {
- SilcUInt32 i;
- SILC_GET32_MSB(i, data);
- *ret_arg_alloc = silc_memdup(&i, sizeof(i));
- }
- break;
-
- case SILC_ARGUMENT_BOOL:
- if (data_len != sizeof(SilcBool))
- return FALSE;
-
- if (ret_arg) {
- SilcBool *b = ret_arg;
- *b = (data[0] == 0x01 ? TRUE : FALSE);
- }
-
- if (ret_arg_alloc) {
- SilcBool b;
- b = (data[0] == 0x01 ? TRUE : FALSE);
- *ret_arg_alloc = silc_memdup(&b, sizeof(b));
- }
- break;
-
- default:
- return FALSE;
- }
-
- return TRUE;
-}
-
-/* Return argument already decoded */
-
-SilcBool silc_argument_get_decoded(SilcArgumentPayload payload,
- SilcUInt32 type,
- SilcArgumentDecodeType dec_type,
- void *ret_arg,
- void **ret_arg_alloc)
-{
- unsigned char *tmp;
- SilcUInt32 tmp_len;
-
- tmp = silc_argument_get_arg_type(payload, type, &tmp_len);
- if (!tmp)
- return FALSE;
-
- return silc_argument_decode(tmp, tmp_len, dec_type, ret_arg, ret_arg_alloc);
-}
-
-/************************* Argument List Payload ****************************/
-
-/* Parses argument payload list */
-
-SilcArgumentPayload
-silc_argument_list_parse(const unsigned char *payload,
- SilcUInt32 payload_len)
-{
- SilcArgumentPayload arg;
- SilcUInt16 argc;
-
- if (payload_len < 5)
- return NULL;
-
- SILC_GET16_MSB(argc, payload);
-
- arg = silc_argument_payload_parse(payload + 2, payload_len - 2, argc);
-
- return arg;
-}
-
-/* Parses argument payload list of specific argument types */
-
-SilcDList
-silc_argument_list_parse_decoded(const unsigned char *payload,
- SilcUInt32 payload_len,
- SilcArgumentDecodeType dec_type)
-{
- SilcArgumentPayload arg;
- SilcArgumentDecodedList dec;
- unsigned char *data;
- SilcUInt32 data_len, type;
- SilcDList list;
-
- arg = silc_argument_list_parse(payload, payload_len);
- if (!arg)
- return NULL;
-
- list = silc_dlist_init();
- if (!list) {
- silc_argument_payload_free(arg);
- return NULL;
- }
-
- data = silc_argument_get_first_arg(arg, &type, &data_len);
- while (data) {
- dec = silc_calloc(1, sizeof(*dec));
- if (!dec)
- continue;
- dec->arg_type = type;
- if (silc_argument_decode(data, data_len, dec_type, NULL, &dec->argument))
- silc_dlist_add(list, dec);
- else
- silc_free(dec);
- data = silc_argument_get_next_arg(arg, &type, &data_len);
- }
-
- silc_argument_payload_free(arg);
-
- silc_dlist_start(list);
-
- return list;
-}
-
-/* Free decoded argument payload list */
-
-void silc_argument_list_free(SilcDList list, SilcArgumentDecodeType dec_type)
-{
- SilcArgumentDecodedList dec;
-
- if (!list)
- return;
-
- silc_dlist_start(list);
- while ((dec = silc_dlist_get(list))) {
- switch (dec_type) {
-
- case SILC_ARGUMENT_ID:
- case SILC_ARGUMENT_UINT32:
- case SILC_ARGUMENT_BOOL:
- silc_free(dec->argument);
- break;
-
- case SILC_ARGUMENT_PUBLIC_KEY:
- silc_pkcs_public_key_free(dec->argument);
- break;
-
- case SILC_ARGUMENT_ATTRIBUTES:
- silc_attribute_payload_free(dec->argument);
- break;
-
- default:
- break;
- }
-
- silc_free(dec);
- }
-
- silc_dlist_uninit(list);
-}
projects / crypto.git / blobdiff