I am writing a C++ application using Openssl library to sign the outgoing
messages and verify it on the other end. Everything works perfectly but
still there is a strange point which I would like to discuss it and your
help would be really appreciated in that case.
I noticed that using private
I am glad someone is asking this question.
I sign the same data with same private key and sometimes the signature is 63
and sometimes it is 64 but overall the verification works for each
anyhow.
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View this message in context:
[owner-openssl-us...@openssl.org] on
behalf of redpath [redp...@us.ibm.com]
Sent: Tuesday, September 17, 2013 2:48 PM
To: openssl-users@openssl.org
Subject: Re: Concerning the ECDSA_sig size
I am glad someone is asking this question.
I sign the same data with same private key and sometimes
That's just the way ECDSA and DSA signatures work. Yes the ASN.1 encoding
factors in but mostly it's just the way the math goes. The signature is a
tuple (r,s) where r and s are mod n and n is fixed per curve. r and s are
always smaller than n, normally around the same size as n, but can also be
From: owner-openssl-us...@openssl.org On Behalf Of shotorddnadd
Sent: Tuesday, September 17, 2013 09:12
I am writing a C++ application using Openssl library to sign the outgoing
messages and verify it on the other end. Everything works perfectly but
still there is a strange point which I
