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IPA 4.8.0 will create a CA with 3072bit RSA key by default. A key size of 3072 was chosen in accordance with recommendation in NIST SP 800-57 Part 1 Revision 4. A 3072bit RSA key as approximately the same security strength as AES-128 and SHA-256. NIST recommends 3072 for RSA keys that are used beyond 2030.
Remark: The ticket originally requested a key size of 4096. We decided to follow the NIST recommendation instead. The security strength of an asymmetric signing algorithm does not scale linear. RSA 2048 is equivalent to a security strengh of 112, 7680bit key to 192, and 15360bit key to 256.
Verified.
Please find the attached verification-output.txt where manual cert key size is verified.
Also executed the upstream test added for this in beta compose build which is working fine.
[root@dhcp207-127 ~]# py.test-3.6 -v -r a --color=yes --multihost-config=/"root/mh_cfg.yaml" --junit-xml=/root/junit.xml /usr/lib/python3.6/site-packages/ipatests/test_integration/test_installation.py::TestInstallMaster
================================================================ test session starts =================================================================
platform linux – Python 3.6.8, pytest-3.4.2, py-1.5.3, pluggy-0.6.0 – /usr/libexec/platform-python
collected 10 items
../usr/lib/python3.6/site-packages/ipatests/test_integration/test_installation.py::TestInstallMaster::test_pki_certs PASSED [ 70%]
[root@dhcp207-127 ~]# rpm -q ipa-server
ipa-server-4.7.90.pre1-3.module+el8.1.0+3389+a3c612fa.x86_64
[root@dhcp207-127 ~]#
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2019:3348