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#include "system.h"
#include <rpm/rpmstring.h>
#include <rpm/rpmpgp.h>
#include <rpm/rpmfileutil.h>
#include <rpm/rpmlog.h>
#include <rpm/rpmkeyring.h>
#include "rpmio/base64.h"
#include "rpmio/digest.h"
#include "debug.h"
struct rpmPubkey_s {
uint8_t *pkt;
size_t pktlen;
pgpKeyID_t keyid;
int nrefs;
};
struct rpmKeyring_s {
struct rpmPubkey_s **keys;
size_t numkeys;
int nrefs;
};
static rpmPubkey rpmPubkeyUnlink(rpmPubkey key);
static rpmKeyring rpmKeyringUnlink(rpmKeyring keyring);
static int keyidcmp(const void *k1, const void *k2)
{
const struct rpmPubkey_s *key1 = *(const struct rpmPubkey_s **) k1;
const struct rpmPubkey_s *key2 = *(const struct rpmPubkey_s **) k2;
return memcmp(key1->keyid, key2->keyid, sizeof(key1->keyid));
}
rpmKeyring rpmKeyringNew(void)
{
rpmKeyring keyring = xcalloc(1, sizeof(*keyring));
keyring->keys = NULL;
keyring->numkeys = 0;
keyring->nrefs = 0;
return rpmKeyringLink(keyring);
}
rpmKeyring rpmKeyringFree(rpmKeyring keyring)
{
if (keyring == NULL) {
return NULL;
}
if (keyring->nrefs > 1) {
return rpmKeyringUnlink(keyring);
}
if (keyring->keys) {
for (int i = 0; i < keyring->numkeys; i++) {
keyring->keys[i] = rpmPubkeyFree(keyring->keys[i]);
}
free(keyring->keys);
}
free(keyring);
return NULL;
}
static rpmPubkey rpmKeyringFindKeyid(rpmKeyring keyring, rpmPubkey key)
{
rpmPubkey *found = NULL;
found = bsearch(&key, keyring->keys, keyring->numkeys, sizeof(*keyring->keys), keyidcmp);
return found ? *found : NULL;
}
int rpmKeyringAddKey(rpmKeyring keyring, rpmPubkey key)
{
if (keyring == NULL || key == NULL)
return -1;
/* check if we already have this key */
if (rpmKeyringFindKeyid(keyring, key)) {
return 1;
}
keyring->keys = xrealloc(keyring->keys, (keyring->numkeys + 1) * sizeof(rpmPubkey));
keyring->keys[keyring->numkeys] = rpmPubkeyLink(key);
keyring->numkeys++;
qsort(keyring->keys, keyring->numkeys, sizeof(*keyring->keys), keyidcmp);
return 0;
}
rpmKeyring rpmKeyringLink(rpmKeyring keyring)
{
if (keyring) {
keyring->nrefs++;
}
return keyring;
}
static rpmKeyring rpmKeyringUnlink(rpmKeyring keyring)
{
if (keyring) {
keyring->nrefs--;
}
return NULL;
}
rpmPubkey rpmPubkeyRead(const char *filename)
{
uint8_t *pkt = NULL;
size_t pktlen;
rpmPubkey key = NULL;
if (pgpReadPkts(filename, &pkt, &pktlen) <= 0) {
goto exit;
}
key = rpmPubkeyNew(pkt, pktlen);
free(pkt);
exit:
return key;
}
rpmPubkey rpmPubkeyNew(const uint8_t *pkt, size_t pktlen)
{
rpmPubkey key = NULL;
if (pkt == NULL || pktlen == 0)
goto exit;
key = xcalloc(1, sizeof(*key));
pgpPubkeyFingerprint(pkt, pktlen, key->keyid);
key->pkt = xmalloc(pktlen);
key->pktlen = pktlen;
key->nrefs = 0;
memcpy(key->pkt, pkt, pktlen);
exit:
return rpmPubkeyLink(key);
}
rpmPubkey rpmPubkeyFree(rpmPubkey key)
{
if (key == NULL)
return NULL;
if (key->nrefs > 1)
return rpmPubkeyUnlink(key);
free(key->pkt);
free(key);
return NULL;
}
rpmPubkey rpmPubkeyLink(rpmPubkey key)
{
if (key) {
key->nrefs++;
}
return key;
}
static rpmPubkey rpmPubkeyUnlink(rpmPubkey key)
{
if (key) {
key->nrefs--;
}
return NULL;
}
pgpDig rpmPubkeyDig(rpmPubkey key)
{
pgpDig dig = NULL;
static unsigned char zeros[] =
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
int rc;
if (key == NULL)
return NULL;
dig = pgpNewDig();
rc = pgpPrtPkts(key->pkt, key->pktlen, dig, 0);
if (rc == 0) {
pgpDigParams pubp = &dig->pubkey;
if (!memcmp(pubp->signid, zeros, sizeof(pubp->signid)) ||
!memcmp(pubp->time, zeros, sizeof(pubp->time)) ||
pubp->userid == NULL) {
rc = -1;
}
}
if (rc)
dig = pgpFreeDig(dig);
return dig;
}
char * rpmPubkeyBase64(rpmPubkey key)
{
char *enc = NULL;
if (key) {
enc = b64encode(key->pkt, key->pktlen, -1);
}
return enc;
}
rpmRC rpmKeyringLookup(rpmKeyring keyring, pgpDig sig)
{
rpmRC res = RPMRC_NOKEY;
if (keyring && sig) {
pgpDigParams sigp = &sig->signature;
pgpDigParams pubp = &sig->pubkey;
struct rpmPubkey_s needle, *key;
needle.pkt = NULL;
needle.pktlen = 0;
memcpy(needle.keyid, sigp->signid, sizeof(needle.keyid));
if ((key = rpmKeyringFindKeyid(keyring, &needle))) {
/* Retrieve parameters from pubkey packet(s) */
int pktrc = pgpPrtPkts(key->pkt, key->pktlen, sig, 0);
/* Do the parameters match the signature? */
if (pktrc == 0 && sigp->pubkey_algo == pubp->pubkey_algo &&
memcmp(sigp->signid, pubp->signid, sizeof(sigp->signid)) == 0) {
res = RPMRC_OK;
}
}
}
return res;
}
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