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comparison libtomcrypt/src/pk/katja/katja_import.c @ 382:0cbe8f6dbf9e

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propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f) to branch 'au.asn.ucc.matt.dropbear' (head 02c413252c90e9de8e03d91e9939dde3029f5c0a)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 02:41:05 +0000
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children f849a5ca2efc
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379:b66a00272a90 382:0cbe8f6dbf9e
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.com
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file katja_import.c
15 Import a PKCS-style Katja key, Tom St Denis
16 */
17
18 #ifdef MKAT
19
20 /**
21 Import an KatjaPublicKey or KatjaPrivateKey [two-prime only, only support >= 1024-bit keys, defined in PKCS #1 v2.1]
22 @param in The packet to import from
23 @param inlen It's length (octets)
24 @param key [out] Destination for newly imported key
25 @return CRYPT_OK if successful, upon error allocated memory is freed
26 */
27 int katja_import(const unsigned char *in, unsigned long inlen, katja_key *key)
28 {
29 int err;
30 void *zero;
31
32 LTC_ARGCHK(in != NULL);
33 LTC_ARGCHK(key != NULL);
34 LTC_ARGCHK(ltc_mp.name != NULL);
35
36 /* init key */
37 if ((err = mp_init_multi(&zero, &key->d, &key->N, &key->dQ,
38 &key->dP, &key->qP, &key->p, &key->q, &key->pq, NULL)) != CRYPT_OK) {
39 return err;
40 }
41
42 if ((err = der_decode_sequence_multi(in, inlen,
43 LTC_ASN1_INTEGER, 1UL, key->N,
44 LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
45 goto LBL_ERR;
46 }
47
48 if (mp_cmp_d(key->N, 0) == LTC_MP_EQ) {
49 /* it's a private key */
50 if ((err = der_decode_sequence_multi(in, inlen,
51 LTC_ASN1_INTEGER, 1UL, zero,
52 LTC_ASN1_INTEGER, 1UL, key->N,
53 LTC_ASN1_INTEGER, 1UL, key->d,
54 LTC_ASN1_INTEGER, 1UL, key->p,
55 LTC_ASN1_INTEGER, 1UL, key->q,
56 LTC_ASN1_INTEGER, 1UL, key->dP,
57 LTC_ASN1_INTEGER, 1UL, key->dQ,
58 LTC_ASN1_INTEGER, 1UL, key->qP,
59 LTC_ASN1_INTEGER, 1UL, key->pq,
60 LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
61 goto LBL_ERR;
62 }
63 key->type = PK_PRIVATE;
64 } else {
65 /* public we have N */
66 key->type = PK_PUBLIC;
67 }
68 mp_clear(zero);
69 return CRYPT_OK;
70 LBL_ERR:
71 mp_clear_multi(zero, key->d, key->N, key->dQ, key->dP,
72 key->qP, key->p, key->q, key->pq, NULL);
73 return err;
74 }
75
76 #endif /* MRSA */
77
78
79 /* $Source: /cvs/libtom/libtomcrypt/src/pk/katja/katja_import.c,v $ */
80 /* $Revision: 1.3 $ */
81 /* $Date: 2006/03/31 14:15:35 $ */