> From: owner-openssl-us...@openssl.org On Behalf Of jeetendra gangele
> Sent: Monday, 17 December, 2012 21:48
> Yes i used [KDF1_SHA1 for ECDH_compute_key] from ec/ecdhtest.c.
> If you see the ECDH_compute_key in last argument It need some hash
> function to sign the shared secret.
The last argu
Actaully here I need to write the hash function which generate the 448
bit hash value.
By looking into openssl I did not find any hash function which can
generate the 448 bit.
Do we have any library function for generating 448 bit hash value?
On 18 December 2012 08:18, jeetendra gangele wrote:
>
Yes i used from ec/ecdhtest.c.
If you see the ECDH_compute_key in last argument It need some hash
function to sign the shared secret.
And here I need 256 bit secret key,that will be point on curve?.
That why I tried to use here sha256,because sha1 is 20bytes .
Also ECDH_compute_key for this fun I
> From: owner-openssl-us...@openssl.org On Behalf Of jeetendra gangele
> Sent: Monday, 17 December, 2012 08:26
> To: openssl-users@openssl.org
> Subject: Re: Need help in loading private key for ECDSA
>
> Thanks for ur help .
>
>
> Can you guide me how can I use E
> From: owner-openssl-us...@openssl.org On Behalf Of jeetendra gangele
> Sent: Monday, 17 December, 2012 13:17
> HI for ECDH can I use the HAs256 algorithm.
>
> I have gone through the inside DS and written this piece of code and
> it worked also.
> But here how can U sesha256 ,when i used i am g
HI for ECDH can I use the HAs256 algorithm.
I have gone through the inside DS and written this piece of code and
it worked also.
But here how can U sesha256 ,when i used i am getting the error.
How can i use here sha256?
int alen = 0;
int blen = 0;
int aout = 0;
int bout = 0;
I need to use ECDH to derive the shared key using public and private key given.
On 17 December 2012 18:56, jeetendra gangele wrote:
> Thanks for ur help .
>
>
> Can you guide me how can I use ECDH for exachnaging of the secret key.
> I have to implement in two phases.
> 1.i have private key o
Thanks for ur help .
Can you guide me how can I use ECDH for exachnaging of the secret key.
I have to implement in two phases.
1.i have private key of 256 bit lenght need to get phase i1 value wx,wy
2.In second I have phase1 value and private key and need to get secret
key or public key.
Tha
> From: owner-openssl-us...@openssl.org On Behalf Of jeetendra gangele
> Sent: Monday, 17 December, 2012 02:48
> Yes i am talking about signature.
> ECDSA_SIG this ouptput structure will have r and s componet
> of 28 bytes each. [for 224-bit curve]
> So if I merge both r and s I will get 56 bytes
> From: owner-openssl-us...@openssl.org On Behalf Of jeetendra gangele
> Sent: Monday, 17 December, 2012 01:58
> Its generating 64 bytes when I print with ECDSA_size(eckey)
> But i neeed 56 bytes signature. [for secp224r1]
>
ECDSA_size is the *maximum* length of the encoded signature,
see the ma
Yes i am talking about signature.
ECDSA_SIG this ouptput structure will have r and s componet of 28 bytes each.
So if I merge both r and s I will get 56 bytes right?
These will not have any padding information?.
Thanks
jeet
On 17 December 2012 13:04, Dave Thompson wrote:
>> From: owner-openssl-
> From: owner-openssl-us...@openssl.org On Behalf Of jeetendra gangele
> Sent: Sunday, 16 December, 2012 22:57
> Actaully I was trying to generate the signature of lenght 56 bytes but
> its failing.
> When I check the code it said lenght of the sig should not
> lessa than 56.
> can anybody help m
Its generating 64 bytes when I print with ECDSA_size(eckey)
But i neeed 56 bytes signature.
On 17 December 2012 12:26, jeetendra gangele wrote:
> Can anybody guide me how can I generate the digital signature of 56
> bytes for ecdsa.
> I am using the curve NID_secp224r1.
> Thanks
> jeetendra
>
> O
Can anybody guide me how can I generate the digital signature of 56
bytes for ecdsa.
I am using the curve NID_secp224r1.
Thanks
jeetendra
On 17 December 2012 09:26, jeetendra gangele wrote:
> Actaully I was trying to generate the signature of lenght 56 bytes but
> its failing.
> When I check the
Actaully I was trying to generate the signature of lenght 56 bytes but
its failing.
When I check the code it said lenght of the sig should not lessa than 56.
can anybody help me how can I generate the signature of lenght 56 bytes?.
On 14 December 2012 19:11, Matt Caswell (fr...@baggins.org)
wrot
>From: owner-openssl-us...@openssl.org On Behalf Of Matt Caswell
(fr...@baggins.org)
>Sent: Friday, 14 December, 2012 08:42
>On 14 December 2012 13:36, jeetendra gangele wrote:
>> Can u do that from command line?
>As far as I know you can't use custom curves from the command line -
On Thu, Dec 13, 2012 at 7:21 PM, Dave Thompson wrote:
>> From: owner-openssl-us...@openssl.org On Behalf Of Jeffrey Walton
>> Sent: Thursday, 13 December, 2012 16:31
>
>> On Thu, Dec 13, 2012 at 12:34 AM, jeetendra gangele
>> wrote:
>
>>...
>>
> Nit: the primitive operation in ECC is called addi
>
> Yes i did same thanks for all ur support.
> Is there any relation between curve parameter and private key or
> private key can be any random number?
>
Yes there is a relationship. The private key must be a random number
between 0 and the order of the curve.
> As far I remeber there is relati
On 14 December 2012 20:39, Matt Caswell (fr...@baggins.org)
wrote:
> On 14 December 2012 15:02, jeetendra gangele wrote:
>>
>> On 14 December 2012 20:18, Matt Caswell (fr...@baggins.org)
>> wrote:
>> >
>> >
>> > On 14 December 2012 14:20, jeetendra gangele
>> > wrote:
>> >>
>> >> it looks very
On 14 December 2012 15:02, jeetendra gangele wrote:
> On 14 December 2012 20:18, Matt Caswell (fr...@baggins.org)
> wrote:
> >
> >
> > On 14 December 2012 14:20, jeetendra gangele
> wrote:
> >>
> >> it looks very odd loading of public key during sign operation.
> >> Ok tell me one thing I can l
On 14 December 2012 20:18, Matt Caswell (fr...@baggins.org)
wrote:
>
>
> On 14 December 2012 14:20, jeetendra gangele wrote:
>>
>> it looks very odd loading of public key during sign operation.
>> Ok tell me one thing I can load any valid point on the curve during sign.
>
>
> An ECDSA sign operat
On 14 December 2012 14:20, jeetendra gangele wrote:
> it looks very odd loading of public key during sign operation.
> Ok tell me one thing I can load any valid point on the curve during sign.
>
An ECDSA sign operates on the curve and associated parameters, the private
key, and the message, and
it looks very odd loading of public key during sign operation.
Ok tell me one thing I can load any valid point on the curve during sign.
and whn I verify the signed message i should be able to verify with
the other valid public key?
Thanks
jeet
On 14 December 2012 19:11, Matt Caswell (fr...@bag
On 14 December 2012 13:36, jeetendra gangele wrote:
> Ok,
> So is there any way after setting these parameters I can get the
> public key(point) on curve.?
>
Setting the parameters just gets you a curve, not a private/public key
pair. To create a private/public key pair create an EC_KEY object (
Ok,
So is there any way after setting these parameters I can get the
public key(point) on curve.?
after setting the curve parameter I can ask for point in the curve
there is one API I have seen right?
GetPublicKey.
Can u do that from command line?
thanks
jeetendra
On 14 December 2012 18:40, Matt
Yes there is a dependency. The curve parameters define what the curve is,
whilst the public key is a point on the curve. The public key is inherently
linked to the curve parameters. If you change the parameters then the
public key will no longer be valid.
Matt
On 14 December 2012 12:42, jeetendra
On 14 December 2012 12:37, jeetendra gangele wrote:
> I got these parameters from marlin and I wanted to load these parameter.
> Its must for me to load these parameters.
>
> I am not familiar with what marlin is, so I cannot advise on that. I would
double check that the parameters do not corresp
Ok Do you know if there any dependency between these curve parameters
and private and public key.?
I mean I am loading these parameters and generating private and public
keys from Openssl command line tools.
It did not worked for me .
but when i use standard curve and load public and private keys
I got these parameters from marlin and I wanted to load these parameter.
Its must for me to load these parameters.
On 14 December 2012 17:37, Matt Caswell (fr...@baggins.org)
wrote:
>
>
> On 14 December 2012 11:47, jeetendra gangele wrote:
>>
>> Thanks
>> But i have these parameters and I wante
On 14 December 2012 11:47, jeetendra gangele wrote:
> Thanks
> But i have these parameters and I wanted to load them p,a,b,q
> Do u know how can i load them?
>
>
The parameters are related to the definition of the curve. Where did you
get the parameters from? Are you sure they are not just the pa
sorry its p,a,b,x,y
On 14 December 2012 17:17, jeetendra gangele wrote:
> Thanks
> But i have these parameters and I wanted to load them p,a,b,q
> Do u know how can i load them?
>
>
> Thanks
> jeetendra
>
>
>
> On 14 December 2012 17:10, Matt Caswell (fr...@baggins.org)
> wrote:
>>
>> On 14 Dece
Thanks
But i have these parameters and I wanted to load them p,a,b,q
Do u know how can i load them?
Thanks
jeetendra
On 14 December 2012 17:10, Matt Caswell (fr...@baggins.org)
wrote:
>
> On 14 December 2012 11:14, jeetendra gangele wrote:
>>
>> Okay,
>> Thankd for ur reply.
>>
>> If i have
On 14 December 2012 11:14, jeetendra gangele wrote:
> Okay,
> Thankd for ur reply.
>
> If i have only private key in my ECC_key object Will be able to sign the
> data?.
>
I've not tried it, so I'm not sure. I've had a quick review of the code and
I can't see any reason why not, but I wouldn't re
Okay,
Thankd for ur reply.
If i have only private key in my ECC_key object Will be able to sign the data?.
I mean i will load only private key and use the curve.Will I be able
to sign the data?
and How can i load other parametes like a,b,g,n in to the object.
On 14 December 2012 16:12, Matt Casw
On 14 December 2012 10:32, jeetendra gangele wrote:
> But why we need to load the public key for signing the data?
> for signing I need only private key.
> When I load the public and private both key I could sign the data.
> but when I load only private key and calling Key_check function its
> fa
But why we need to load the public key for signing the data?
for signing I need only private key.
When I load the public and private both key I could sign the data.
but when I load only private key and calling Key_check function its failing.
Thanks
Jeetendra
On 14 December 2012 15:32, Matt Casw
char b1[] =
> "18679335321211177614181391980475641049275229937844945546185683145837";
>
Where did you get this value from? Is this a private key you have been
provided with that you *must* use?
Unless you particularly need to use a specific private key it is better to
use
EC_KEY_generate_key
> From: owner-openssl-us...@openssl.org On Behalf Of Jeffrey Walton
> Sent: Thursday, 13 December, 2012 16:31
> On Thu, Dec 13, 2012 at 12:34 AM, jeetendra gangele
> wrote:
> I have not really been following this thread, so please forgive my
> dumb questions.
>
> Are you using a NIST curve? If
On Thu, Dec 13, 2012 at 12:34 AM, jeetendra gangele
wrote:
> Hi i tried to load private key into 224 curve for ecdsa and I am
> getting below error.
>
> EC_KEY_check_key failed:
> error:100B1043:lib(16):func(177):reason(67).
>
> Bleow is my fun to load key.
>
> Can anybody guide me?
$ openssl errs
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