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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*
* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
*/
#include "tomcrypt.h"
/**
@file katja_import.c
Import a PKCS-style Katja key, Tom St Denis
*/
#ifdef MKAT
/**
Import an KatjaPublicKey or KatjaPrivateKey [two-prime only, only support >= 1024-bit keys, defined in PKCS #1 v2.1]
@param in The packet to import from
@param inlen It's length (octets)
@param key [out] Destination for newly imported key
@return CRYPT_OK if successful, upon error allocated memory is freed
*/
int katja_import(const unsigned char *in, unsigned long inlen, katja_key *key)
{
int err;
void *zero;
LTC_ARGCHK(in != NULL);
LTC_ARGCHK(key != NULL);
LTC_ARGCHK(ltc_mp.name != NULL);
/* init key */
if ((err = mp_init_multi(&zero, &key->d, &key->N, &key->dQ,
&key->dP, &key->qP, &key->p, &key->q, &key->pq, NULL)) != CRYPT_OK) {
return err;
}
if ((err = der_decode_sequence_multi(in, inlen,
LTC_ASN1_INTEGER, 1UL, key->N,
LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
goto LBL_ERR;
}
if (mp_cmp_d(key->N, 0) == LTC_MP_EQ) {
/* it's a private key */
if ((err = der_decode_sequence_multi(in, inlen,
LTC_ASN1_INTEGER, 1UL, zero,
LTC_ASN1_INTEGER, 1UL, key->N,
LTC_ASN1_INTEGER, 1UL, key->d,
LTC_ASN1_INTEGER, 1UL, key->p,
LTC_ASN1_INTEGER, 1UL, key->q,
LTC_ASN1_INTEGER, 1UL, key->dP,
LTC_ASN1_INTEGER, 1UL, key->dQ,
LTC_ASN1_INTEGER, 1UL, key->qP,
LTC_ASN1_INTEGER, 1UL, key->pq,
LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
goto LBL_ERR;
}
key->type = PK_PRIVATE;
} else {
/* public we have N */
key->type = PK_PUBLIC;
}
mp_clear(zero);
return CRYPT_OK;
LBL_ERR:
mp_clear_multi(zero, key->d, key->N, key->dQ, key->dP,
key->qP, key->p, key->q, key->pq, NULL);
return err;
}
#endif /* MRSA */
/* $Source: /cvs/libtom/libtomcrypt/src/pk/katja/katja_import.c,v $ */
/* $Revision: 1.3 $ */
/* $Date: 2006/03/31 14:15:35 $ */
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