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Hi,</div>
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i am trying to modify a function which earlier used openss1 to compute shared key the aruguments to the function are:</div>
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rc_vchar_t *pub , rc_vchar_t *priv ; '// public and private keys.<br>
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if (eay_v2bn(&dh->pub_key, pub) < 0)
<div> goto end;</div>
<div> if (eay_v2bn(&dh->priv_key, priv) < 0)</div>
<span> goto end;</span><br>
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<span> DH_compute_key(v, dh_pub, dh))<br>
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For openssl3 we are trying to use (EVP_PKEY_derive) the below code is how i implemented:</div>
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rc_vchar_t *pub, rc_vchar_t *priv, // parameters to the function<br>
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BIGNUM *dh_pub_key = NULL;<br>
<span> BIGNUM *dh_priv_key = NULL;</span><br>
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if (eay_v2bn(&dh_pub_key, pub) < 0)
<div> goto end;</div>
<div>if (eay_v2bn(&dh_priv_key, priv) < 0)</div>
<div> goto end;</div>
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pub_key_buf = (unsigned char*) malloc( BN_num_bytes(dh_pub_key));
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<div> if (!pub_key_buf)</div>
<div> goto end;</div>
<div> BN_bn2nativepad(dh_pub_key, pub_key_buf, BN_num_bytes(dh_pub_key));</div>
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<div> priv_key_buf = (unsigned char*) malloc( BN_num_bytes(dh_priv_key));</div>
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<div> if (!priv_key_buf)</div>
<div> goto end;</div>
<div> BN_bn2nativepad(dh_priv_key, priv_key_buf, BN_num_bytes(dh_priv_key));</div>
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<div> pklen = strlen((char*)priv_key_buf);</div>
<div> peerklen = strlen((char*)pub_key_buf);</div>
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<div> const unsigned char *pub_key = ( const unsigned char *)pub_key_buf;</div>
<div> const unsigned char *priv_key = ( const unsigned char *)priv_key_buf;</div>
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<span> pkey = d2i_PrivateKey(EVP_PKEY_RSA, &pkey, &priv_key, pklen);</span></div>
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peerkey = d2i_PublicKey(EVP_PKEY_RSA, &peerkey, &pub_key, peerklen);<br>
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ctx = EVP_PKEY_CTX_new(pkey, NULL);<br>
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The problem its failing at Pkey and PeerKey creation. Does anyone have any idea how to get it working. Also can anyone suggest how to know the correct replacemant for <span style="background-color:rgb(255, 255, 255);display:inline !important">EVP_PKEY_RSA,
OR any way to know what is the type for my pub and priv keys</span></div>
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<span style="background-color:rgb(255, 255, 255);display:inline !important"><br>
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<span style="background-color:rgb(255, 255, 255);display:inline !important">Thanks,</span></div>
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<span style="background-color:rgb(255, 255, 255);display:inline !important">Saketh.</span></div>
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