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/*
* marshal.c - SKS compatible marshalling routines
*
* Copyright 2011 Jonathan McDowell <noodles@earth.li>
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <arpa/inet.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "charfuncs.h"
#include "keyid.h"
#include "keystructs.h"
#include "mem.h"
#include "parsekey.h"
void marshal_publickey(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
const struct openpgp_publickey *key)
{
uint32_t len;
struct openpgp_packet_list *packets = NULL, *list_end = NULL;
struct buffer_ctx buf;
buf.buffer = calloc(1, 1024);
buf.size = 1024;
buf.offset = 0;
flatten_publickey((struct openpgp_publickey *) key, &packets,
&list_end);
write_openpgp_stream(buffer_putchar, &buf, packets);
len = htonl(buf.offset);
putchar_func(ctx, sizeof(len), &len);
putchar_func(ctx, buf.offset, buf.buffer);
free_packet_list(packets);
}
void marshal_skshash(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
const struct skshash *hash)
{
uint32_t len;
len = htonl(sizeof(hash->hash));
putchar_func(ctx, sizeof(len), &len);
putchar_func(ctx, sizeof(hash->hash), (void *) hash->hash);
}
struct skshash *unmarshal_skshash(int (*getchar_func)(void *ctx, size_t count,
void *c),
void *ctx)
{
uint32_t len;
struct skshash *hash;
if (getchar_func(ctx, sizeof(len), &len)) {
return NULL;
}
len = ntohl(len);
if (len > sizeof(struct skshash)) {
return NULL;
}
hash = calloc(sizeof(struct skshash), 1);
if (getchar_func(ctx, len, hash->hash)) {
free(hash);
return NULL;
}
return hash;
}
void marshal_string(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
const char *string)
{
uint32_t len, nlen;
len = strlen(string);
nlen = htonl(len);
putchar_func(ctx, sizeof(nlen), &nlen);
putchar_func(ctx, len, &string);
}
char *unmarshal_string(int (*getchar_func)(void *ctx, size_t count,
void *c),
void *ctx)
{
uint32_t len;
char *string;
if (getchar_func(ctx, sizeof(len), &len)) {
return NULL;
}
len = ntohl(len);
string = malloc(len + 1);
if (getchar_func(ctx, len, string)) {
free(string);
return NULL;
}
string[len] = 0;
return string;
}
void marshal_array(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
void (*marshal_func)(int
(*putchar_func)(void *ctx,
size_t count, void *c),
void *ctx, const void *item),
void **array,
int size)
{
uint32_t len;
int i;
len = htonl(size);
putchar_func(ctx, sizeof(len), &len);
for (i = 0; i < size; i++) {
marshal_func(putchar_func, ctx, array[i]);
}
}
void **unmarshal_array(int (*getchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
void *(*unmarshal_func)(int
(*getchar_func)(void *ctx,
size_t count, void *c),
void *ctx),
int *size)
{
uint32_t len;
void **array;
int i;
if (getchar_func(ctx, sizeof(len), &len)) {
return NULL;
}
*size = ntohl(len);
array = malloc(*size * sizeof(void *));
for (i = 0; i < *size; i++) {
array[i] = unmarshal_func(getchar_func, ctx);
}
return array;
}
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