I got it working through,

pkey = (EVP_PKEY *)PEM_ASN1_read((char *(*)())d2i_AutoPrivateKey, PEM_STRING_EVP_PKEY,
fp, buff, NULL, NULL);

May be I am not sure that what I did was correct.

In this case may I know why not to use PEM_ASN1_read rather than using PEM_read_PrivateKey.

Thanks again for the immediate reply and for the forth coming replies.

Murugesan

----- Original Message -----

From: Dr. Stephen Henson

To: [EMAIL PROTECTED]

Sent: Thursday, February 19, 2004 5:40 PM

Subject: Re: asn1 encoding routines:d2i_PrivateKey:unknown public key type:d2i_pr.c:112

On Thu, Feb 19, 2004, murugesan wrote:

> Hello all,
>     When I executed the following program to read the private key it resulted in
>
> Generating RSA private key, 512 bit long modulus
> ....................++++++++++++
> ...............++++++++++++
> e is 65537 (0x10001)
> 13953:error:0D09A0A3:asn1 encoding routines:d2i_PrivateKey:unknown public key type:d2i_pr.c:112:
> 13953:error:0906700D:PEM routines:PEM_ASN1_read_bio:ASN1 lib:pem_oth.c:82:
> Assertion failed: evpkey!=0, file w.c, line 34
> Abort(coredump)
>
> #include <stdio.h>
> #include <string.h>
> #include <openssl/rsa.h>
> #include <openssl/evp.h>
> #include <openssl/err.h>
> #include <openssl/x509.h>
> #include <openssl/pem.h>
> #include <sys/types.h>
> #include <assert.h>
>
>
> EVP_PKEY * readkey(const char * keyfile)
> {
>   FILE * fp = fopen(keyfile, "r");
>   char ** buff = NULL;
>   EVP_PKEY * pkey = NULL;
>   if (!fp)
>    return NULL;
>   pkey = (EVP_PKEY *)PEM_ASN1_read((char *(*)())d2i_PrivateKey, PEM_STRING_EVP_PKEY,
>                                    fp, buff, NULL, NULL);
>   fclose (fp);
>   if (pkey == NULL)
>    ERR_print_errors_fp(stderr);
>   return pkey;
> }
>
> int main(int argc, char * argv[]) {
>   const char * privatekey = "private.key";
>   EVP_PKEY * evpkey= NULL;
>   system("openssl genrsa -out private.key");
>   CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
>   ERR_load_crypto_strings();
>   evpkey= readkey(privatekey);
>   assert(evpkey!=0);
>   EVP_PKEY_free(evpkey);
>   return 0;
> }
>
>

Don't use PEM_ASN1_read(). Use PEM_read_PrivateKey() instead.

Steve.
--
Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
OpenSSL project core developer and freelance consultant.
Funding needed! Details on homepage.
Homepage: http://www.drh-consultancy.demon.co.uk
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Re: asn1 encoding routines:d2i_PrivateKey:unknown public key type:d2i_pr.c:112

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