Jürgen Heiss wrote:
Hi Jim,
First of all thanks for your fast answer.
But still it don't understand 100%!
If have an SignatureValue which is
724PlFGHTTL1cFlLFU6g6UetcPVBEAN6oNpogAUx3rgELFH86gA+NqvjVf316zek
But how can I but this now into an ECDSA_SIG struct?
Jürgen
[not sure of the openssl aspect, somebody correct me if i'm wrong]
ecdsa_sig is defined as two integers:
{
int r;
int s;
}
normally with ecdsa, signatures have sizeof(r) == sizeof(s) ==
sizeof(prime field). if you use a 160-bit prime field then you have a 40
byte signature (20 byte r, 20 byte s).
you divide the total length into half and the first half could be 'r'
and second half 's' (or vice versa depending on how your ECDSA_SIG is
defined).
-jb
--
mathematician, n.:
Some one who believes imaginary things appear right before your
i's.
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