I used fwrite(signature,1,strlen(signature),fp) and got the same results.


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Victor Duchovni
Sent: Saturday, November 22, 2008 1:25 PM
To: openssl-users@openssl.org
Subject: Re: sign/verify kicking my ass

On Sat, Nov 22, 2008 at 10:38:18AM -0800, Shaun R. wrote:

> Can anybody help me out, not sure whats going wrong.  My test case right 
> now is the following
> 
>        signature = (unsigned char*) malloc(RSA_size(private_key));
>        if(RSA_sign(NID_sha1, (unsigned char*) message, strlen(message), 
> signature, &slen, private_key) != 1) {
>                ERR_print_errors_fp(stdout);
>        }
> 
>        printf("%s", signature);

The signature is not a NUL terminated C-string, so using "printf" is
not the right way to save it to a file. You are throwing away "slen",
don't.

-- 
        Viktor.
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