I've solved my problem :
EC_KEY *key;
EC_GROUP *group;
//creation de la clef
if ((key = EC_KEY_new()) == NULL)
{
ret_ecdsa_check = -6;
return (ret_ecdsa_check);
}
group = EC_GROUP_new_by_curve_name(NID_secp192k1);
if (group == NULL)
{
ret_ecdsa_check = -5;
return (ret_ecdsa_check);
}
if (EC_KEY_set_group(key, group) == 0)
{
ret_ecdsa_check = -4;
return (ret_ecdsa_check);
}
EC_GROUP_free(group);
if (EC_GROUP_get_degree(EC_KEY_get0_group(key)) < 16
Peviously, I didn't use the link function between the key and the
curve : EC_KEY_set_group(key, group)
So now it works with the source code upper.
Romain Hinfray
On Thu, Mar 5, 2009 at 2:43 PM, Billy Brumley <[email protected]> wrote:
> I think you want a key, not the group.
>
> EC_GROUP_new_by_curve_name => EC_KEY_new_by_curve_name
>
> Billy
>
> On Mon, Mar 2, 2009 at 6:15 PM, neorom <[email protected]> wrote:
>> I resolved my previous problem, the error came in the name of the
>> variable "key" which has to be named "eckey". So there is a mistake in
>> the code in the documentation.
>>
>> Now my problem is more difficult, because after :
>>
>> Initialization of the structure :
>> EC_KEY *eckey = EC_KEY_new()
>> link with an elliptic curve :
>> eckey = EC_GROUP_new_by_curve_name(NID_secp192k1);
>> finally, the creation of this key :
>> if (!EC_KEY_generate_key(eckey))
>> {
>> printf("error key generation\n");
>> }
>>
>> when I execute my code, I get a Semgentation Fault and gdb tell me
>> that the problem comes with the function : BN_copy()
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x0805fee8 in BN_copy ()
>>
>> I am working with ubuntu and the libssl0.9.8g-10
>>
>> Thanks in advance for your help,
>>
>> Romain Hinfray
>>
>>
>> On Mon, Mar 2, 2009 at 2:57 PM, neorom <[email protected]> wrote:
>>> Hello every body,
>>>
>>> I'm new on this mailing list. I actually have to do a small program
>>> which have to generate signature with the ecdsa algorithm and I have
>>> never did it before.
>>> For this I saw the documentation and the example on the openssl web
>>> site (http://www.openssl.org/docs/crypto/ecdsa.html).
>>>
>>> But on line 8 of this program : key->group =
>>> EC_GROUP_new_by_nid(NID_secp192k1);
>>> , I don't understood why the "key" structure isn't initialized before
>>> and with struture defines it. Gcc tells me that : error: ‘key’
>>> undeclared.
>>>
>>> Can you help me please.
>>>
>>> Thanks in advance
>>>
>>> Romain Hinfray
>>>
>> ______________________________________________________________________
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> ______________________________________________________________________
> OpenSSL Project http://www.openssl.org
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