* Jonathan McDowell <noodles@earth.li>
*
* Copyright 2002 Project Purple
+ *
+ * $Id: parsekey.c,v 1.14 2003/09/30 21:59:33 noodles Exp $
*/
#include <assert.h>
#include "keyid.h"
#include "keystructs.h"
#include "ll.h"
+#include "log.h"
#include "mem.h"
#include "parsekey.h"
*
* This function takes an list of OpenPGP packets and attempts to parse it
* into a list of public keys with signatures and subkeys.
+ *
+ * Returns a count of how many keys we parsed.
*/
int parse_keys(struct openpgp_packet_list *packets,
struct openpgp_publickey **keys)
{
struct openpgp_publickey *curkey = NULL;
+ int count;
+
+ count = 0;
+
+ /*
+ * If keys already has some keys in it then set curkey to the last one
+ * so we add to the end of the list.
+ */
+ for (curkey = *keys; curkey != NULL && curkey->next != NULL;
+ curkey = curkey->next) ;
while (packets != NULL) {
switch (packets->packet->tag) {
}
memset(curkey, 0, sizeof(*curkey));
curkey->publickey = packet_dup(packets->packet);
+ count++;
break;
case 13:
case 17:
subkey,
packet_dup(packets->packet));
break;
+ case 12:
+ case 61:
+ /*
+ * One of:
+ *
+ * Trust packet. Ignore.
+ * Comment packet. Ignore.
+ */
+ break;
default:
- printf("Unsupported packet type: %d\n",
+ logthing(LOGTHING_ERROR,
+ "Unsupported packet type: %d",
packets->packet->tag);
}
packets = packets->next;
}
- return 0;
+ return count;
}
/**
* @getchar_func: The function to get the next character from the stream.
* @ctx: A pointer to the context structure for getchar_func.
* @packets: The outputted list of packets.
+ * @maxnum: The maximum number of keys to read. 0 means unlimited.
*
* This function uses getchar_func to read characters from an OpenPGP
* packet stream and reads the packets into a linked list of packets
int read_openpgp_stream(int (*getchar_func)(void *ctx, size_t count,
unsigned char *c),
void *ctx,
- struct openpgp_packet_list **packets)
+ struct openpgp_packet_list **packets,
+ int maxnum)
{
unsigned char curchar = 0;
unsigned long count = 0;
struct openpgp_packet_list *curpacket = NULL;
int rc = 0;
+ int keys = 0;
bool inpacket = false;
assert(packets != NULL);
+ curpacket = *packets;
+ if (curpacket != NULL) {
+ while (curpacket->next != NULL) {
+ curpacket = curpacket->next;
+ }
+ }
- while (!rc && !getchar_func(ctx, 1, &curchar)) {
+ while (!rc && !getchar_func(ctx, 1, &curchar) &&
+ (maxnum == 0 || keys < maxnum)) {
if (!inpacket && (curchar & 0x80)) {
/*
* New packet. Record the fact we're in a packet and
curpacket->packet->newformat = (curchar & 0x40);
- // TODO: Better error checking on getchar_func.
+ /*
+ * TODO: Better error checking on getchar_func.
+ */
if (curpacket->packet->newformat) {
curpacket->packet->tag = (curchar & 0x3F);
rc = getchar_func(ctx, 1, &curchar);
curpacket->packet->length += 192;
} else if (curpacket->packet->length > 223 &&
curpacket->packet->length < 255) {
- printf("Partial length; not supported.\n");
- } else {
+ logthing(LOGTHING_NOTICE,
+ "Partial length;"
+ " not supported.");
+ } else if (curpacket->packet->length == 255) {
/*
* 5 byte length; ie 255 followed by 3
* bytes of MSB length.
rc = getchar_func(ctx, 1, &curchar);
curpacket->packet->length = curchar;
}
-
} else {
curpacket->packet->tag = (curchar & 0x3C) >> 2;
switch (curchar & 3) {
curpacket->packet->length += curchar;
break;
case 2:
- printf("Unsupported length type 2.\n");
+ rc = getchar_func(ctx, 1, &curchar);
+ curpacket->packet->length =
+ (curchar << 24);
+ rc = getchar_func(ctx, 1, &curchar);
+ curpacket->packet->length +=
+ (curchar << 16);
+ rc = getchar_func(ctx, 1, &curchar);
+ curpacket->packet->length +=
+ (curchar << 8);
+ rc = getchar_func(ctx, 1, &curchar);
+ curpacket->packet->length += curchar;
break;
case 3:
- printf("Unsupported length type 3.\n");
+ logthing(LOGTHING_ERROR,
+ "Unsupported length type 3.");
+ curpacket->packet->length = 0;
+ curpacket->packet->data = NULL;
+ rc = -1;
break;
}
}
- curpacket->packet->data =
- malloc(curpacket->packet->length *
+
+ if (rc == 0) {
+ if (curpacket->packet->tag == 6) {
+ keys++;
+ }
+ curpacket->packet->data =
+ malloc(curpacket->packet->length *
sizeof(unsigned char));
- rc = getchar_func(ctx, curpacket->packet->length,
- curpacket->packet->data);
+ if (curpacket->packet->data == NULL) {
+ logthing(LOGTHING_ERROR,
+ "Can't allocate memory for "
+ "packet!");
+ rc = -1;
+ } else {
+ rc = getchar_func(ctx,
+ curpacket->packet->length,
+ curpacket->packet->data);
+ }
+ }
inpacket = false;
} else {
- fprintf(stderr, "Unexpected character: 0x%X\n",
+ logthing(LOGTHING_ERROR, "Unexpected character: 0x%X",
curchar);
}
}
* This function uses putchar_func to write characters to an OpenPGP
* packet stream from a linked list of packets.
*/
-int write_openpgp_stream(int (*putchar_func)(void *ctx, unsigned char c),
+int write_openpgp_stream(int (*putchar_func)(void *ctx, size_t count,
+ unsigned char *c),
void *ctx,
struct openpgp_packet_list *packets)
{
unsigned char curchar = 0;
- int i;
while (packets != NULL) {
curchar = 0x80;
if (packets->packet->newformat) {
curchar |= 0x40;
curchar |= packets->packet->tag;
- putchar_func(ctx, curchar);
+ putchar_func(ctx, 1, &curchar);
if (packets->packet->length < 192) {
- putchar_func(ctx, packets->packet->length);
+ curchar = packets->packet->length;
+ putchar_func(ctx, 1, &curchar);
} else if (packets->packet->length > 191 &&
packets->packet->length < 8383) {
-// fputs("Potentially dodgy code here.\n", stderr);
- putchar_func(ctx,
- (((packets->packet->length - 192) &
- 0xFF00) >> 8) + 192);
-
- putchar_func(ctx,
- (packets->packet->length - 192) &
- 0xFF);
+ curchar = (((packets->packet->length - 192) &
+ 0xFF00) >> 8) + 192;
+ putchar_func(ctx, 1, &curchar);
+ curchar = (packets->packet->length - 192) &
+ 0xFF;
+ putchar_func(ctx, 1, &curchar);
} else {
- fputs("Unsupported new format length.\n", stderr);
+ logthing(LOGTHING_ERROR,
+ "Unsupported new format length.");
}
} else {
curchar |= (packets->packet->tag << 2);
if (packets->packet->length < 256) {
- putchar_func(ctx, curchar);
- putchar_func(ctx, packets->packet->length);
+ putchar_func(ctx, 1, &curchar);
+ curchar = packets->packet->length;
+ putchar_func(ctx, 1, &curchar);
} else if (packets->packet->length < 0x10000) {
curchar |= 1;
- putchar_func(ctx, curchar);
- putchar_func(ctx, packets->packet->length >> 8);
- putchar_func(ctx,
- packets->packet->length & 0xFF);
+ putchar_func(ctx, 1, &curchar);
+ curchar = packets->packet->length >> 8;
+ putchar_func(ctx, 1, &curchar);
+ curchar = packets->packet->length & 0xFF;
+ putchar_func(ctx, 1, &curchar);
} else {
curchar |= 2;
- putchar_func(ctx, curchar);
- putchar_func(ctx,
- packets->packet->length >> 24);
- putchar_func(ctx,
- (packets->packet->length >> 16) & 0xFF);
- putchar_func(ctx,
- (packets->packet->length >> 8) & 0xFF);
- putchar_func(ctx,
- packets->packet->length & 0xFF);
+ putchar_func(ctx, 1, &curchar);
+ curchar = packets->packet->length >> 24;
+ putchar_func(ctx, 1, &curchar);
+ curchar = (packets->packet->length >> 16) & 0xFF;
+ putchar_func(ctx, 1, &curchar);
+ curchar = (packets->packet->length >> 8) & 0xFF;
+ putchar_func(ctx, 1, &curchar);
+ curchar = packets->packet->length & 0xFF;
+ putchar_func(ctx, 1, &curchar);
}
}
- for (i = 0; i < packets->packet->length; i++) {
- putchar_func(ctx, packets->packet->data[i]);
- }
+ putchar_func(ctx, packets->packet->length,
+ packets->packet->data);
packets = packets->next;
}
return 0;
projects / onak.git / blobdiff