openssl/emssl-custom/ecdsa_sig.c

/*
 *
 *    Copyright (c) 2011-2015 Nest Labs, Inc.
 *    All rights reserved.
 *
 *    This document is the property of Nest. It is considered
 *    confidential and proprietary information.
 *
 *    This document may not be reproduced or transmitted in any form,
 *    in whole or in part, without the express written permission of
 *    Nest.
 *
 *    Description:
 *        Simplified implementation of OpenSSL's ECDSA_SIG functions.
 *
 *        These avoid references to OpenSSL's ASN1 infrastructure, which is bloated
 *        and unnecessary in this context.
 */

#include <stdlib.h>

#include <openssl/ecdsa.h>
#include <openssl/bn.h>

ECDSA_SIG *ECDSA_SIG_new(void)
{
    ECDSA_SIG *sig = (ECDSA_SIG *)CRYPTO_malloc(sizeof(ECDSA_SIG), __FILE__, __LINE__);

    if (sig != NULL)
    {
        sig->r = BN_new();
        sig->s = BN_new();
    }

    return sig;
}

void ECDSA_SIG_free(ECDSA_SIG *sig)
{
    if (sig != NULL)
    {
        BN_free(sig->r);
        BN_free(sig->s);

        CRYPTO_free(sig);
    }
}