| /* 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.org |
| */ |
| #include "tomcrypt.h" |
| |
| /** |
| @file rsa_export.c |
| Export RSA PKCS keys, Tom St Denis |
| */ |
| |
| #ifdef MRSA |
| |
| /** |
| This will export either an RSAPublicKey or RSAPrivateKey [defined in PKCS #1 v2.1] |
| @param out [out] Destination of the packet |
| @param outlen [in/out] The max size and resulting size of the packet |
| @param type The type of exported key (PK_PRIVATE or PK_PUBLIC) |
| @param key The RSA key to export |
| @return CRYPT_OK if successful |
| */ |
| int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key) |
| { |
| int err; |
| unsigned long zero=0; |
| |
| LTC_ARGCHK(out != NULL); |
| LTC_ARGCHK(outlen != NULL); |
| LTC_ARGCHK(key != NULL); |
| |
| /* type valid? */ |
| if (!(key->type == PK_PRIVATE) && (type == PK_PRIVATE)) { |
| return CRYPT_PK_INVALID_TYPE; |
| } |
| |
| if (type == PK_PRIVATE) { |
| /* private key */ |
| /* output is |
| Version, n, e, d, p, q, d mod (p-1), d mod (q - 1), 1/q mod p |
| */ |
| if ((err = der_encode_sequence_multi(out, outlen, |
| LTC_ASN1_SHORT_INTEGER, 1UL, &zero, |
| LTC_ASN1_INTEGER, 1UL, &key->N, |
| LTC_ASN1_INTEGER, 1UL, &key->e, |
| 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_EOL, 0UL, NULL)) != CRYPT_OK) { |
| return err; |
| } |
| |
| /* clear zero and return */ |
| return CRYPT_OK; |
| } else { |
| /* public key */ |
| return der_encode_sequence_multi(out, outlen, |
| LTC_ASN1_INTEGER, 1UL, &key->N, |
| LTC_ASN1_INTEGER, 1UL, &key->e, |
| LTC_ASN1_EOL, 0UL, NULL); |
| } |
| } |
| |
| #endif /* MRSA */ |
| |
| /* $Source: /cvs/libtom/libtomcrypt/src/pk/rsa/rsa_export.c,v $ */ |
| /* $Revision: 1.11 $ */ |
| /* $Date: 2005/06/04 01:42:48 $ */ |