Hello,
If I understand correctly, regarding X9.63 standard (5.6.3) derive key (in
case KDF_SHA1) must be computed as
SHA1(Z || counter || [SharedInfo])
Z - secret value.
But function KDF in the file ecdhtest .c does not use counter and compute key
as:
SHA1(Z)
To my mind bit string of counter equal 1 must be included in Sha1 hash
calculation.
Is it bug, or my understanding?
Best regards
Mark
Mark Shnaider | Software engineer | ARX
phone: +972.3.9279543 | mobile: +972.54.2448543 | email: [EMAIL PROTECTED] |
www.arx.com
