| /* 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 $ */ |