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#include "openssl_utils.h"
#include <openssl/opensslv.h>
#include <openssl/ec.h>
#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x30000000L
// This is for OpenSSL 3.0.0 and newer
EVP_PKEY *EVP_PKEY_new_generate_ecdsa (const char* curve) {
// Generate EVP_PKEY directly
EVP_PKEY *pkey = EVP_EC_gen (curve);
return pkey;
}
#else
// This is for OpenSSL before 3.0.0 and forks of earlier OpenSSL versions like LibreSSL
EVP_PKEY *EVP_PKEY_new_generate_ecdsa (const char* curve) {
// Get NID from curve name
int nid = OBJ_sn2nid (curve);
if (nid == NID_undef) return NULL;
// Create EC_KEY
EC_KEY *ec_key = EC_KEY_new_by_curve_name (nid);
if (!ec_key) return NULL;
// Generate key
if (!EC_KEY_generate_key (ec_key)) {
EC_KEY_free (ec_key);
return NULL;
}
// Create EVP_PKEY
EVP_PKEY *pkey = EVP_PKEY_new ();
if (!pkey) {
EC_KEY_free (ec_key);
return NULL;
}
// Assign EC_KEY to EVP_PKEY
if (!EVP_PKEY_assign_EC_KEY (pkey, ec_key)) {
EC_KEY_free (ec_key);
return NULL;
}
// EVP_PKEY_assign_EC_KEY takes ownership of ec_key, no need to free it explicitly
return pkey;
}
#endif
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