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/* $OpenBSD: key.c,v 1.12 2002/09/11 09:50:44 ho Exp $ */
/*
* The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
*
* Copyright (c) 2000-2001 Angelos D. Keromytis.
*
* Permission to use, copy, and modify this software with or without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
* You may use this code under the GNU public license if you so wish. Please
* contribute changes back to the authors under this freer than GPL license
* so that we may further the use of strong encryption without limitations to
* all.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
#include <string.h>
#include "sysdep.h"
#include "key.h"
#include "libcrypto.h"
#include "log.h"
#include "util.h"
#include "x509.h"
void
key_free (int type, int private, void *key)
{
switch (type)
{
case ISAKMP_KEY_PASSPHRASE:
free (key);
break;
case ISAKMP_KEY_RSA:
RSA_free (key);
break;
case ISAKMP_KEY_NONE:
default:
log_error ("key_free: unknown/unsupportedkey type %d", type);
break;
}
}
/* Convert from internal form to serialized */
void
key_serialize (int type, int private, void *key, u_int8_t **data, size_t *datalen)
{
u_int8_t *p;
switch (type)
{
case ISAKMP_KEY_PASSPHRASE:
*datalen = strlen ((char *)key);
*data = (u_int8_t *)strdup ((char *)key);
break;
case ISAKMP_KEY_RSA:
switch (private)
{
case ISAKMP_KEYTYPE_PUBLIC:
*datalen = i2d_RSAPublicKey ((RSA *)key, NULL);
*data = p = malloc (*datalen);
if (!p)
{
log_error("key_serialize: malloc (%lu) failed",
(unsigned long)*datalen);
return;
}
*datalen = i2d_RSAPublicKey ((RSA *)key, &p);
break;
case ISAKMP_KEYTYPE_PRIVATE:
*datalen = i2d_RSAPrivateKey ((RSA *)key, NULL);
*data = p = malloc (*datalen);
if (!p)
{
log_error("key_serialize: malloc (%lu) failed",
(unsigned long)*datalen);
return;
}
*datalen = i2d_RSAPrivateKey ((RSA *)key, &p);
break;
}
break;
default:
log_error ("key_serialize: unknown/unsupported key type %d", type);
break;
}
}
/* Convert from serialized to printable */
char *
key_printable (int type, int private, u_int8_t *data, int datalen)
{
char *s;
int i;
switch (type)
{
case ISAKMP_KEY_PASSPHRASE:
return strdup ((char *)data);
case ISAKMP_KEY_RSA:
s = malloc (datalen * 2 + 1);
if (!s)
{
log_error ("key_printable: malloc (%d) failed", datalen * 2 + 1);
return 0;
}
for (i = 0; i < datalen; i++)
snprintf (s + (2 * i), 2 * (datalen - i) + 1, "%02x", data[i]);
return s;
default:
log_error ("key_printable: unknown/unsupported key type %d", type);
return 0;
}
}
/* Convert from serialized to internal. */
void *
key_internalize (int type, int private, u_int8_t *data, int datalen)
{
switch (type)
{
case ISAKMP_KEY_PASSPHRASE:
return strdup ((char *)data);
case ISAKMP_KEY_RSA:
switch (private)
{
#if OPENSSL_VERSION_NUMBER >= 0x00907000L
case ISAKMP_KEYTYPE_PUBLIC:
return d2i_RSAPublicKey (NULL, (const u_int8_t **)&data, datalen);
case ISAKMP_KEYTYPE_PRIVATE:
return d2i_RSAPrivateKey (NULL, (const u_int8_t **)&data, datalen);
#else
case ISAKMP_KEYTYPE_PUBLIC:
return d2i_RSAPublicKey (NULL, &data, datalen);
case ISAKMP_KEYTYPE_PRIVATE:
return d2i_RSAPrivateKey (NULL, &data, datalen);
#endif
default:
log_error ("key_internalize: not public or private RSA key passed");
return 0;
}
break;
default:
log_error ("key_internalize: unknown/unsupported key type %d", type);
break;
}
return 0;
}
/* Convert from printable to serialized */
void
key_from_printable (int type, int private, char *key, u_int8_t **data,
u_int32_t *datalen)
{
switch (type)
{
case ISAKMP_KEY_PASSPHRASE:
*datalen = strlen (key);
*data = (u_int8_t *)strdup (key);
break;
case ISAKMP_KEY_RSA:
*datalen = (strlen (key) + 1) / 2; /* Round up, just in case */
*data = malloc (*datalen);
if (!*data)
{
log_error ("key_from_printable: malloc (%d) failed", *datalen);
return;
}
*datalen = hex2raw (key, *data, *datalen);
break;
default:
log_error ("key_from_printable: unknown/unsupported key type %d", type);
break;
}
}
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