[pls correct me if i'm wrong]
Jürgen Heiss wrote:
Hi again,
Yes, ecdsa_sig is defined like
{
int r;
int s;
}
But the problem is that I don't know how to get my SignaturValue which is "724PlFGHTTL1cFlLFU6g6UetcPVBEAN6oNpogAUx3rgELFH86gA+NqvjVf316zek" into this struct.
The function d2i_ECDSA_SIG which should fill this struct always return -1; ;o(
d2i is for the asn.1 conversion.
you see, as Nils, pointed out your blob is not in asn.1 der format (not
starting with 0x30..). since ecdsa_sig is BIGNUM *r, *s; you can try
using the BN_bin2bn() function to directly convert your blob to BIGNUM.
you'll need to do this twice, once for r & once for s. Since Nils told
that the 2 numbers were concat'ed & since most of the time they're the
same size, you can take one half of the buffer to be r & the other half
to be s.
Once you have BIGNUM's you can put them directly into your ECDSA_SIG.
-jb
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