14:31
To: openssl-users@openssl.org
Subject: Re: rsa_sign versus RSA_private_encrypt
On Thu, Oct 28, 2010, Bob Dijck wrote:
> Thank you, Steve, for the swift reply.
> Can I use i2d_X509_SIG to perform to encapsulation step (supposing I have to
> use RSA_private_encrypt)?
>
Well yo
owner-openssl-us...@openssl.org wrote on 10/28/2010 03:07:18 AM:
> From: Bob Dijck
>
> I am trying to implement a signing function in C++ using RSA.
> Here’s how I wanted to do this:
> - First I calculate the SHA1 hash (not using openssl but another
> implementation).
> - But then what? Sho
On Thu, Oct 28, 2010, Bob Dijck wrote:
> Thank you, Steve, for the swift reply.
> Can I use i2d_X509_SIG to perform to encapsulation step (supposing I have to
> use RSA_private_encrypt)?
>
Well you can if you want but RSA_sign() does all that for you.
There is an easier way: the encapsulation
. Stephen Henson
Sent: donderdag 28 oktober 2010 12:32
To: openssl-users@openssl.org
Subject: Re: rsa_sign versus RSA_private_encrypt
On Thu, Oct 28, 2010, Bob Dijck wrote:
> Hello,
>
> I am trying to implement a signing function in C++ using RSA. Here's how I
> wanted to do this: - Firs
On Thu, Oct 28, 2010, Bob Dijck wrote:
> Hello,
>
> I am trying to implement a signing function in C++ using RSA. Here's how I
> wanted to do this: - First I calculate the SHA1 hash (not using openssl but
> another implementation). - But then what? Should I use RSA_private_encrypt
> or rsa_sign
Thanks, thats what i get for being lazy, for testing i was just using a
small key, i just changed it to my 4096 key and it's working..
Where am i going wrong here?
char* message = "Hello World";
if(RSA_sign(NID_md5, (unsigned char*) message, strlen(message),
signature, &
> Where am i going wrong here?
> char* message = "Hello World";
> if(RSA_sign(NID_md5, (unsigned char*) message, strlen(message),
> signature, &slen, private_key) != 1) {
The problem is that your RSA key is very small. A 256-bit RSA key can only
sign up to 32 bytes. 11 bytes are
On Fri, Sep 19, 2008, Marco Sommella wrote:
> Hi,
> I'm using OpenSSL 0.9.8a 11 Oct 2005 (+ security patches to 2007-10-13) on
> opensolaris 2008.11 b97 and programming in C.
> My question is about the message digest *m used into functions in object.*
> **
> *I have notice a strange *behavior conc
Op donderdag 24 februari 2005 om 12:33 uur schreef Manuel Sánchez Cuenca het
volgende:
> Hello all, I'm writting a C program to sign a char[] with the following
> code:
> ==
> FILE *pKeyFile = fopen("srv-key.pem", "r");
> RSA *rsa_key =
> > The input to RSA_sign() must be smaller than BN_num_bytes(rsa->n) minus
> > PKCS#1 padding bytes and some bytes for the asn1 digest encoding.
>
> where is it written ?
The RSA signature generation is specified in the PKCS#1 draft
( http://www.rsasecurity.com/rsalabs/pkcs/pkcs-1/index.html )
>
> The input to RSA_sign() must be smaller than BN_num_bytes(rsa->n) minus
> PKCS#1 padding bytes and some bytes for the asn1 digest encoding.
where is it written ?
>
> [...]
> > so I don't understand what is going on with the value 100...and more I
> > don't know how to sign my real buffer (
> Hi all,
>
> thanks for your help on DH stuff :-)
> Now I have a pb with RSA_sign().
>
> I have a buffer and I want to sign it with my private key.
>
> So I generate a key:
>
> openssl genrsa -out key.pem 1024
>
> then I have the following code:
>
> "
> rsa = RSA_new();
> get_my_priv_RSA(&rsa);
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