1
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
3
* LibTomCrypt is a library that provides various cryptographic
4
* algorithms in a highly modular and flexible manner.
6
* The library is free for all purposes without any express
9
* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org
15
Export RSA PKCS keys, Tom St Denis
21
This will export either an RSAPublicKey or RSAPrivateKey [defined in PKCS #1 v2.1]
22
@param out [out] Destination of the packet
23
@param outlen [in/out] The max size and resulting size of the packet
24
@param type The type of exported key (PK_PRIVATE or PK_PUBLIC)
25
@param key The RSA key to export
26
@return CRYPT_OK if successful
28
int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key)
33
LTC_ARGCHK(out != NULL);
34
LTC_ARGCHK(outlen != NULL);
35
LTC_ARGCHK(key != NULL);
38
if (!(key->type == PK_PRIVATE) && (type == PK_PRIVATE)) {
39
return CRYPT_PK_INVALID_TYPE;
42
if (type == PK_PRIVATE) {
45
Version, n, e, d, p, q, d mod (p-1), d mod (q - 1), 1/q mod p
47
if ((err = der_encode_sequence_multi(out, outlen,
48
LTC_ASN1_SHORT_INTEGER, 1UL, &zero,
49
LTC_ASN1_INTEGER, 1UL, &key->N,
50
LTC_ASN1_INTEGER, 1UL, &key->e,
51
LTC_ASN1_INTEGER, 1UL, &key->d,
52
LTC_ASN1_INTEGER, 1UL, &key->p,
53
LTC_ASN1_INTEGER, 1UL, &key->q,
54
LTC_ASN1_INTEGER, 1UL, &key->dP,
55
LTC_ASN1_INTEGER, 1UL, &key->dQ,
56
LTC_ASN1_INTEGER, 1UL, &key->qP,
57
LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
61
/* clear zero and return */
65
return der_encode_sequence_multi(out, outlen,
66
LTC_ASN1_INTEGER, 1UL, &key->N,
67
LTC_ASN1_INTEGER, 1UL, &key->e,
68
LTC_ASN1_EOL, 0UL, NULL);
74
/* $Source: /cvs/libtom/libtomcrypt/src/pk/rsa/rsa_export.c,v $ */
75
/* $Revision: 1.11 $ */
76
/* $Date: 2005/06/04 01:42:48 $ */