Hello,
> I am using ECDSA with 224 bit secp224r1 curve. But the signature I am
> getting is of size 64bytes; shouldn't it be 56 bytes (r||s)? Also its
> not 56bytes + 8bytes zero's padding. Please help me.
This signarure is ASN.1 encoded, when you decode this signature with
command:
$ openssl asn1parse -in file.sig -inform der
0:d=0 hl=2 l= 60 cons: SEQUENCE
2:d=1 hl=2 l= 28 prim:
INTEGER :23345E38FC02141868D4834C846FB822BF18D2574B3BD7792C7E7B3D
32:d=1 hl=2 l= 28 prim:
INTEGER :25F567969A53ACBC2C68653BD73D145EE3C6FF691DD7EB61EEF5202F
you will see that r and s are 28 bytes long and you have some ASN.1
header overhead.
Best regards,
--
Marek Marcola <[EMAIL PROTECTED]>
______________________________________________________________________
OpenSSL Project http://www.openssl.org
User Support Mailing List [email protected]
Automated List Manager [EMAIL PROTECTED]
