ECDH- NID_X9_62_prime256v1 - EVP_RAND_generate()

Damodhar Boddukuri via openssl-users <[email protected]> Wed, 31 Jul 2024 12:41:08 +0000

Newsgroups	gmane.comp.encryption.openssl.user
Message-ID	<PA4PR04MB79680428D4BAF8C51BFBB24CA9B12@PA4PR04MB7968.eurprd04.prod.outlook.com>

Hi,

I am implementing ECDH- Group19 (NID_X9_62_prime256v1). I followed the below sequence.

  1.  ecdh_group = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1); // NID_X9_62_prime256v1 or  NID_secp256k1
  2.  ecdh_keys = EC_KEY_new();
  3.  ret = EC_KEY_set_group(ecdh_keys, ecdh_group);
  4.  ret = EC_KEY_generate_key(ecdh_keys);
At 4th step, function EVP_RAND_generate ()  always returning '0'. Because of this reason 4th step is failing.

Could you please let me know the possible reasons for it.

Thanks & Regards,
Damodhar.



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