mirror of
https://github.com/Laupetin/OpenAssetTools.git
synced 2025-04-22 09:05:44 +00:00
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* 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.
|
|
*/
|
|
#include "tomcrypt.h"
|
|
|
|
/**
|
|
@file katja_import.c
|
|
Import a PKCS-style Katja key, Tom St Denis
|
|
*/
|
|
|
|
#ifdef LTC_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 /* LTC_MRSA */
|
|
|
|
|
|
/* ref: HEAD -> master, tag: v1.18.2 */
|
|
/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
|
|
/* commit time: 2018-07-01 22:49:01 +0200 */
|