Obsolete

Starting from version 2.0.4 of latvia-eid-middleware digest functions have been fixed and now return correct values using both digest methods.

HSM Digest

Prerequisites

• Python 3
• PyKCS11
• eParakstītājs 3.0 (eID-LV Middleware)
• SoftHSM2

Digests

Running

Using SoftHSM2:

python digest.py -lib softhsm -pin 0000

Using eID LV Middleware:

python digest.py -lib otlv -pin 0000

Results

This program uses SHA1 (default) hash function to get digest of three strings. Digests can be checked individually against sha1sum tool:

echo -n "hello world!" | sha1sum

The wrong digests that eID LV Middleware gives are calculated from twice repeated string:

echo -n "hello world!hello world!" | sha1sum

PKCS#11 defines two similar approaches to using message digest functions: using C_Digest or C_DigestUpdate + C_DigestFinal:

C_Digest is equivalent to a sequence of C_DigestUpdate operations followed by C_DigestFinal.

It appears only C_Digest function in eID LV Middleware gives wrong digests.