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Re: TLS handshake failure

On 08/09/2011 11:59 AM, Daniel Qian wrote:
On 11-08-09 12:55 PM, Rich Megginson wrote:
On 08/09/2011 10:15 AM, Daniel Qian wrote:
On 11-08-09 11:21 AM, Rich Megginson wrote:
On 08/09/2011 09:07 AM, Daniel Qian wrote:
On 11-08-09 10:49 AM, Rich Megginson wrote:
On 08/09/2011 08:33 AM, Daniel Qian wrote:

I have slapd 2.4.24 and everything works without TLS. but if I add a -Z option to the ldapsearch command I get this:

[root@ldaprov1 cacerts]# ldapsearch -x -LLL -b cn=config -D cn=admin,cn=config -wxxxxxxx -Z -H ldap://ldaprov1.prod cn=config
ldap_start_tls: Connect error (-11)
ldap_result: Can't contact LDAP server (-1)

slapd.log shows something like this : connection_read(16): TLS accept failure error=-1 id=1006, closing

Output from openssl debug:

[root@ldaprov1 cacerts]# openssl s_client -connect hostname:389 -showcerts -state -CAfile cacert.pem
SSL_connect:before/connect initialization
SSL_connect:SSLv2/v3 write client hello A
140225133647680:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:s23_lib.c:177:
no peer certificate available
No client certificate CA names sent
SSL handshake has read 0 bytes and written 113 bytes
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE

The configurations are as follow (same command as above but without the -Z option):

[root@ldaprov1 cacerts]# ldapsearch -x -LLL -b cn=config -D cn=admin,cn=config -wxxxxxx -H ldap://hostname cn=config
dn: cn=config
objectClass: olcGlobal
cn: config
olcConfigFile: /etc/openldap/slapd.conf
olcConfigDir: /etc/openldap/slapd.d
olcAllows: bind_v2
olcArgsFile: /var/run/openldap/slapd.args
olcAttributeOptions: lang-
olcAuthzPolicy: none
olcConcurrency: 0
olcConnMaxPending: 100
olcConnMaxPendingAuth: 1000
olcGentleHUP: FALSE
olcIdleTimeout: 0
olcIndexSubstrIfMaxLen: 4
olcIndexSubstrIfMinLen: 2
olcIndexSubstrAnyLen: 4
olcIndexSubstrAnyStep: 2
olcIndexIntLen: 4
olcLocalSSF: 71
olcLogLevel: 9
olcPidFile: /var/run/openldap/slapd.pid
olcReadOnly: FALSE
olcReverseLookup: FALSE
olcSaslSecProps: noplain,noanonymous
olcSockbufMaxIncoming: 262143
olcSockbufMaxIncomingAuth: 16777215
olcThreads: 16
olcTLSCACertificateFile: /etc/openldap/cacerts/cacert.pem
olcTLSCertificateFile: /etc/openldap/cacerts/ldaprov1.crt
olcTLSCertificateKeyFile: /etc/openldap/cacerts/ldaprov1.key
olcTLSVerifyClient: never
olcToolThreads: 1
olcWriteTimeout: 0

I verified the ldap user can read all the TLS files and they are setup fine

[root@ldaprov1 cacerts]# openssl verify -purpose sslserver -CAfile cacert.pem ldaprov1.crt
ldaprov1.crt: OK

Anyone can tell me what I am missing here?
No, but we're missing
1) platform
2) tls implementation (openssl, moznss, gnutls)
3) output of ldapsearch -x -d 1 -Z ...... rest of arguments .....

Its Fedora 15

ldd /usr/sbin/slapd
        linux-vdso.so.1 =>  (0x00007fff76fff000)
        libltdl.so.7 => /usr/lib64/libltdl.so.7 (0x00007f0f29fcd000)
        libdb-4.8.so => /lib64/libdb-4.8.so (0x00007f0f29c53000)
libsasl2.so.2 => /usr/lib64/libsasl2.so.2 (0x00007f0f29a38000)
        libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00007f0f29801000)
        libresolv.so.2 => /lib64/libresolv.so.2 (0x00007f0f295e6000)
        libssl3.so => /usr/lib64/libssl3.so (0x00007f0f293b0000)
        libsmime3.so => /usr/lib64/libsmime3.so (0x00007f0f29183000)
        libnss3.so => /usr/lib64/libnss3.so (0x00007f0f28e4b000)
libnssutil3.so => /usr/lib64/libnssutil3.so (0x00007f0f28c2b000)
        libplds4.so => /lib64/libplds4.so (0x00007f0f28a28000)
        libplc4.so => /lib64/libplc4.so (0x00007f0f28824000)
        libnspr4.so => /lib64/libnspr4.so (0x00007f0f285e6000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f0f283cb000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f0f28032000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f0f27e2d000)
        libfreebl3.so => /lib64/libfreebl3.so (0x00007f0f27bcc000)
        libz.so.1 => /lib64/libz.so.1 (0x00007f0f279b5000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f0f2a66a000)

the ldapsearch -d 1 option tells me a lot more:
TLS: file ldaprov1.crt does not end in [.0] - does not appear to be a CA certificate directory file with a properly hashed file name - skipping. TLS: file cacert.pem does not end in [.0] - does not appear to be a CA certificate directory file with a properly hashed file name - skipping. TLS: file ldaprov1.key does not end in [.0] - does not appear to be a CA certificate directory file with a properly hashed file name - skipping.

I tell slapd to look for specific files but how come it is still checking in a directory?
I don't know. What does /etc/openldap/ldap.conf say? Do you have a ~/.ldaprc or ~/ldaprc for the user "ldap"?

So even for slapd the setting TLS_CACERTDIR in /etc/openldap/ldap.conf takes precedence over olcTLSCACertificateFile in cn=config? I set /etc/openldap/ldap.conf for client only and did not mean it for slapd.
I don't know. Can someone confirm that this is how it works when using openssl or gnutls for crypto? That is, I don't think this problem is specific to moznss.

Now after I removed it from /etc/openldap/ldap.conf, ldapsearch -d 1 is indicating the CA certificate not valid:

TLS: certificate [CA certificate details omitted here...] is not valid - error -8172:Unknown code ___f 20.
error -8172:Unknown code ___f 20.
tls_write: want=7, written=7
  0000:  15 03 01 00 02 02 30                               ......0
TLS: error: connect - force handshake failure: errno 21 - moznss error -8172
TLS: can't connect: TLS error -8172:Unknown code ___f 20.
ldap_start_tls: Connect error (-11)
        additional info: TLS error -8172:Unknown code ___f 20

Does this mean all the certificates I created on the same server with openssl can not be used by modnss in slapd? I never delt with modnss before

Can you provide the entire log leading up to this point? you can paste it to fpaste.org if you don't want to spam the list with too much information.

Yes, openldap with moznss should work _exactly_ like openldap with openssl. If this is something that was working before this is a bug that needs to be fixed asap.

I ran the same ldapsearch command from a Centos box which has openssl and the error messages says this :

TLS certificate verification: Error, self signed certificate in certificate chain

which is not true. I have separate CA certificate and server certificate. The server certificate is signed by the CA certificate.
openssl seems to be complaining about the CA certificate:
TLS certificate verification: depth: 1, err: 19, subject: /C=CA/ST=Ontario/L=Toronto/O=Epic Media Group/OU=IT/CN=Epic Media Group root CA/emailAddress=sysadmin@theepicmediagroup.com, issuer: /C=CA/ST=Ontario/L=Toronto/O=Epic Media Group/OU=IT/CN=Epic Media Group root CA/emailAddress=sysadmin@theepicmediagroup.com
TLS certificate verification: Error, self signed certificate in certificate chain

Note that the subject: is the same as the issuer: - that is, it is a self signed certificate (self issued).

But I'm not sure if this is the real problem.
TLS trace: SSL3 alert write:fatal:unknown CA

Do you have the CA cert on the client machine?

Seems the server certificate defined in olcTLSCertificateFile never gets recognized by the client.

Centos openssl output pasted - http://fpaste.org/7Hju/
Fedora moznss output pasted - http://fpaste.org/aE19/

If you remove TLS_CACERTDIR from /etc/openldap/ldap.conf and then specify
olcTLSCACertificateFile: /etc/openldap/cacerts/cacert.pem
olcTLSCertificateFile: /etc/openldap/cacerts/ldaprov1.crt
olcTLSCertificateKeyFile: /etc/openldap/cacerts/ldaprov1.key

in your slapd config, does it work?

Thanks for looking into the issue