[FWD] How can I get private key and public key separately?

[OpenSSL]

----- Forwarded message from ÃÖ¿ë»ï <[EMAIL PROTECTED]> -----
From: "ÃÖ¿ë»ï" <[EMAIL PROTECTED]>
Reply-To: "ÃÖ¿ë»ï" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: How can I get private key and public key separately?
Date: Sun, 06 Jun 1999 17:11:11 KST
Errors-To: <[EMAIL PROTECTED]>

Hi,

I'm a newbie to openssl.

I want to get public key and private key separately in DER form.
Below is my code to make this with reference to the exam.c in "demo" directory.

----------------------------------------------------------

#include <stdio.h>
#include <string.h>
#include <openssl/rsa.h>

typedef struct {
    unsigned char der_pubkey[BUFSIZ*10];
    int siz_pubkey;
    unsigned char der_privkey[BUFSIZ*10];
    int siz_privkey;
} DER_RSAKEY;


void gen_rsaderkey(DER_RSAKEY *rk, int keysize)
{
    RSA *rsa, *pub_rsa, *priv_rsa;
    unsigned char keybuf[BUFSIZ*10], *pbuf;
    int len;

    rsa = RSA_generate_key(keysize, RSA_F4, callback, (char *)stdout);

    pbuf = keybuf;
    len = i2d_RSAPublicKey(rsa, &pbuf);
    len += i2d_RSAPrivateKey(rsa, &pbuf);

/* get separated rsa key pair */
    pbuf = keybuf;
    pub_rsa = d2i_RSAPublicKey(NULL, &pbuf, (long) len);
    len -= pbuf - keybuf;
    priv_rsa = d2i_RSAPrivateKey(NULL, &pbuf, (long) len);

/* get separated der key pair */
    pbuf = rk->der_privkey;
    rk->siz_privkey = i2d_RSAPublicKey(priv_rsa, &pbuf);
    rk->siz_privkey += i2d_RSAPrivateKey(priv_rsa, &pbuf);

    pbuf = rk->der_pubkey;
    rk->siz_pubkey = i2d_RSAPublicKey(pub_rsa, &pbuf);
    rk->siz_pubkey += i2d_RSAPrivateKey(pub_rsa, &pbuf);  //******//

    RSA_free(rsa);
    RSA_free(pub_rsa);
    RSA_free(priv_rsa);
}

----------------------------------------------------

In the part // ******
I got segmentation fault and I suppose that it is because
pub_rsa has no private key.

Please help me with getting separated key pair.

TIA,
Foombar
==================================================
Æò»ý ¾²´Â ¹«·á E-mail ÁÖ¼Ò ÇѸÞÀϳÝ
http://www.hanmail.net
----- End forwarded message -----
______________________________________________________________________
OpenSSL Project                                 http://www.openssl.org
User Support Mailing List                    [EMAIL PROTECTED]
Automated List Manager                           [EMAIL PROTECTED]