On Tue, Jun 16, 2020 at 12:58 PM Chris Herdt <cherdt@umn.edu> wrote:
I have an appliance that I want to use with our FreeIPA-provided LDAP servers. The appliance only supports the following ciphers:
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 (0xc024)
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (0xc023)
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (0xc00a)
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009)
I tried changing the following in dse.ldif, based on http://www.port389.org/docs/389ds/design/nss-cipher-design.html:
nsSSL3Ciphers: +all
This should allow all the ciphers that the NSS supports.
Keep in mind you do need to restart the server after changing
nsSSL3Ciphers.
Run this ldapsearch:
# ldapsearch -D "cn=directory manager" -W -xLLL -b
cn=encryption,cn=config nsSSLEnabledCiphers
nsSSLSupportedCiphers
This will show what is available to the server, and what is
enabled.
Do you see your ciphers in the available list
and/or enabled list?
So can try to do:
nsSSL3Ciphers: +all,+
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,+
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,+
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,+
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
Restart the
server, check that ldapsearch command to see if
these ciphers are now enabled.
HTH,
Mark
However, this enabled only the following 7 ciphers (based on the output of nmap --script ssl-enum-ciphers -p 636 freeipa-01.example.com):
TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
TLS_RSA_WITH_SEED_CBC_SHA
Here's the content of the dn: cn=encryption,cn=config section:
dn: cn=encryption,cn=config
CACertExtractFile: /etc/dirsrv/slapd-EXAMPLE-COM/CN3dUSERTrust20RSA20Certif
ication20Authority2cO3dThe20USERTRUST20Network2cL3dJersey20City2cST3dNew20Jer
sey2cC3dUS.pem
allowWeakCipher: off
cn: encryption
createTimestamp: 20181108213233Z
creatorsName: cn=server,cn=plugins,cn=config
modifiersName: cn=server,cn=plugins,cn=config
modifyTimestamp: 20181108213359Z
nsSSL3Ciphers: +all
nsSSLClientAuth: allowed
nsSSLSessionTimeout: 0
objectClass: top
objectClass: nsEncryptionConfig
sslVersionMin: TLS1.2
numSubordinates: 1
Any ideas why this change isn't enabling the additional ciphers? Thanks!
I should have mentioned, my FreeIPA servers are running ipa-server 4.6.6 on CentOS 7.8.
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