Sign xString with RSA-PSS in ABAP

[philippwa]

Hallo,

how to sign a given xString in ABAP with RSA-PSS algorithm.

Please also provide a code example. Thank you!

Greeting

Philipp Wallutis

[philippwa]

Why is this voted down?


According to the new documentation, SAPCryptoLib supports the RSA-PSS algo.

But I am having problems getting this to run in ABAP.


Any help is appreciated.

[philippwa]

Hey Robert,

your code runs well with the 'PKCS-V1.5' format.
When I run your Code with the str_format = 'PKCS1-PSS' i get a CRC of 2 - "Invalid security format".

My current system uses the following specs:

SSFLIB Version 1.850.40 ; CommonCryptoLib (SAPCRYPTOLIB) Version 8.5.39 (+MT) #Copyright (c) SAP, 2011-2021#compiled for linux-gcc-4.3-x86-64

[Former Member]

philippwa

CCL 8.5.39 is not the newest, but I guess it supports PSS.

Most probably it is the kernel, which is not supporting it.

With CCL 8.5.44, Kernel 7.89 PL52 from S/4HANA FOUNDATION 2022 - it works.

But with CCL 8.5.35 and kernel 7.53 PL800 it does not.

If the combination kernel/ccl is not supporting it, there is nothing you can do, except using OS commands like openssl.

EDIT: tested with Kernel 7.77 PL200 - does not work, but with 7.77 PL500 it works.

[philippwa]

Thank you Robert. We pretty much appreciated your help!

[matt]

Down? It's got 8 up votes!

[angeloruggiero]

Was there any answer to this?