Anonymous DH key agreement problem

Hi Peter,
I want to do a DH key agreement between two peers and I referred to your
sample code at Pg. 193 of manual.pdf.

In the following code, the cryptExportKey() function returns a error code of
-11.
If I remove the comments at line 4 and 5 (these two lines are not required
though), cryptExportKey() returns an error code of -4.

Please let me know whats amiss here !!
As per my understanding, we should be able to export (and import) DH
components without creating certificates.


  status = cryptInit();

  status = cryptCreateContext(&dhContext, cryptUser, CRYPT_ALGO_DH);
  // 4> cryptSetAttributeString( dhContext, CRYPT_CTXINFO_LABEL, "dh key",
6);
  // 5> cryptGenerateKey(dhContext);

  /* Create the key template */
  status = cryptCreateContext( &cryptContext, cryptUser, CRYPT_ALGO_BLOWFISH
);

  cryptSetAttribute( cryptContext, CRYPT_CTXINFO_MODE, CRYPT_MODE_CFB );
  /* Export the key using the template */
  status = cryptExportKey( encryptedKey, 4096, &encryptedKeyLength,
dhContext, cryptContext );
*  printf("\n cryptExportKey RC:%d", status);*

cryptDestroyContext( cryptContext );

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