Java OpenLDAP和SSL

我在尝试连接到已设置的安全OpenLDAP服务器时遇到问题。关于运行LDAP客户端代码

java -Djavax.net.debug=ssl LDAPConnector

我得到以下异常跟踪（java版本1.6.0_17）

在运行

openssl s_client-connectldap.natraj.com:636-showcerts

时，我获得了自签名证书

我的slapd.conf文件如下

#######################################################################
# Global Directives:

# Features to permit
#allow bind_v2

# Schema and objectClass definitions
include         /etc/ldap/schema/core.schema
include         /etc/ldap/schema/cosine.schema
include         /etc/ldap/schema/nis.schema
include         /etc/ldap/schema/inetorgperson.schema

# Where the pid file is put. The init.d script
# will not stop the server if you change this.
pidfile         /var/run/slapd/slapd.pid

# List of arguments that were passed to the server
argsfile        /var/run/slapd/slapd.args

# Read slapd.conf(5) for possible values
loglevel        none

# Where the dynamically loaded modules are stored
modulepath      /usr/lib/ldap
moduleload      back_hdb

# The maximum number of entries that is returned for a search operation
sizelimit 500

# The tool-threads parameter sets the actual amount of cpu's that is used
# for indexing.
tool-threads 1

#######################################################################
# Specific Backend Directives for hdb:
# Backend specific directives apply to this backend until another
# 'backend' directive occurs
backend         hdb

#######################################################################
# Specific Backend Directives for 'other':
# Backend specific directives apply to this backend until another
# 'backend' directive occurs
#backend                <other>

#######################################################################
# Specific Directives for database #1, of type hdb:
# Database specific directives apply to this databasse until another
# 'database' directive occurs
database        hdb

# The base of your directory in database #1
suffix          "dc=localdomain"

# rootdn directive for specifying a superuser on the database. This is needed
# for syncrepl.
rootdn          "cn=admin,dc=localdomain"

# Where the database file are physically stored for database #1
directory       "/var/lib/ldap"

# The dbconfig settings are used to generate a DB_CONFIG file the first
# time slapd starts.  They do NOT override existing an existing DB_CONFIG
# file.  You should therefore change these settings in DB_CONFIG directly
# or remove DB_CONFIG and restart slapd for changes to take effect.

# For the Debian package we use 2MB as default but be sure to update this
# value if you have plenty of RAM
dbconfig set_cachesize 0 2097152 0

# Sven Hartge reported that he had to set this value incredibly high
# to get slapd running at all. See http://bugs.debian.org/303057 for more
# information.

# Number of objects that can be locked at the same time.
dbconfig set_lk_max_objects 1500
# Number of locks (both requested and granted)
dbconfig set_lk_max_locks 1500
# Number of lockers
dbconfig set_lk_max_lockers 1500

# Indexing options for database #1
index           objectClass eq

# Save the time that the entry gets modified, for database #1
lastmod         on

# Checkpoint the BerkeleyDB database periodically in case of system
# failure and to speed slapd shutdown.
checkpoint      512 30

# Where to store the replica logs for database #1
# replogfile    /var/lib/ldap/replog
# The userPassword by default can be changed
# by the entry owning it if they are authenticated.
# Others should not be able to see it, except the
# admin entry below
# These access lines apply to database #1 only
access to attrs=userPassword,shadowLastChange
        by dn="cn=admin,dc=localdomain" write
        by anonymous auth
        by self write
        by * none

# Ensure read access to the base for things like
# supportedSASLMechanisms.  Without this you may
# have problems with SASL not knowing what
# mechanisms are available and the like.
# Note that this is covered by the 'access to *'
# ACL below too but if you change that as people
# are wont to do you'll still need this if you
# want SASL (and possible other things) to work
# happily.
access to dn.base="" by * read

# The admin dn has full write access, everyone else
# can read everything.
access to *
        by dn="cn=admin,dc=localdomain" write
        by * read

# For Netscape Roaming support, each user gets a roaming
# profile for which they have write access to
#access to dn=".*,ou=Roaming,o=morsnet"
#        by dn="cn=admin,dc=localdomain" write
#        by dnattr=owner write
#######################################################################
# Specific Directives for database #2, of type 'other' (can be hdb too):
# Database specific directives apply to this databasse until another
# 'database' directive occurs
#database        <other>

# The base of your directory for database #2
#suffix         "dc=debian,dc=org"

#######################################################################
# SSL:
# Uncomment the following lines to enable SSL and use the default
# snakeoil certificates.
#TLSCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem
#TLSCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key

TLSCipherSuite TLS_RSA_AES_256_CBC_SHA
TLSCACertificateFile /etc/ldap/ssl/server.pem
TLSCertificateFile /etc/ldap/ssl/server.pem
TLSCertificateKeyFile /etc/ldap/ssl/server.pem

---

为什么我可以使用一个版本的JRE连接到同一台服务器，而不能使用另一个版本的JRE

在发送SSLv2 ClientHello之后，您直接得到了这个消息，因此应该尝试禁用SSlv2ClientHello。请参阅JSSE参考指南。

修复了该问题。出现此问题是因为JRE（版本1.6.0_17）发送的密码套件与服务器接受的密码套件不匹配

服务器的slapd.conf包含该行

TLSCipherSuite TLS_RSA_AES_256_CBC_SHA

而这个特定的Java客户端正在发送一组套件，其中包括TLS\u RSA\u AES\u 128\u CBC\u SHA。只需在slapd.conf中注释掉上面提到的行，问题就解决了。造成混淆的原因是，当问题是密码套件时，服务器返回了一个EOF异常

---

然而，JRE（版本1.6.0_14）正在发送TLS_RSA_AES_256_CBC_SHA作为其接受的密码套件的一部分，因此相同的代码适用于此版本。

我没有使用自己的SSL套接字，而是使用javax.naming.*API连接到LDAP服务器。我无法控制此API使用的套接字。我可以在SSL套接字实例上使用setEnabledProtocols（）方法仅添加{“TLSv1”}，但如何在所有此类套接字上启用它。我应该自己写一个CustomSSLSocketFactory吗？我认为有一个系统属性会禁用它。请参阅JSSE参考指南。

#######################################################################
# Global Directives:

# Features to permit
#allow bind_v2

# Schema and objectClass definitions
include         /etc/ldap/schema/core.schema
include         /etc/ldap/schema/cosine.schema
include         /etc/ldap/schema/nis.schema
include         /etc/ldap/schema/inetorgperson.schema

# Where the pid file is put. The init.d script
# will not stop the server if you change this.
pidfile         /var/run/slapd/slapd.pid

# List of arguments that were passed to the server
argsfile        /var/run/slapd/slapd.args

# Read slapd.conf(5) for possible values
loglevel        none

# Where the dynamically loaded modules are stored
modulepath      /usr/lib/ldap
moduleload      back_hdb

# The maximum number of entries that is returned for a search operation
sizelimit 500

# The tool-threads parameter sets the actual amount of cpu's that is used
# for indexing.
tool-threads 1

#######################################################################
# Specific Backend Directives for hdb:
# Backend specific directives apply to this backend until another
# 'backend' directive occurs
backend         hdb

#######################################################################
# Specific Backend Directives for 'other':
# Backend specific directives apply to this backend until another
# 'backend' directive occurs
#backend                <other>

#######################################################################
# Specific Directives for database #1, of type hdb:
# Database specific directives apply to this databasse until another
# 'database' directive occurs
database        hdb

# The base of your directory in database #1
suffix          "dc=localdomain"

# rootdn directive for specifying a superuser on the database. This is needed
# for syncrepl.
rootdn          "cn=admin,dc=localdomain"

# Where the database file are physically stored for database #1
directory       "/var/lib/ldap"

# The dbconfig settings are used to generate a DB_CONFIG file the first
# time slapd starts.  They do NOT override existing an existing DB_CONFIG
# file.  You should therefore change these settings in DB_CONFIG directly
# or remove DB_CONFIG and restart slapd for changes to take effect.

# For the Debian package we use 2MB as default but be sure to update this
# value if you have plenty of RAM
dbconfig set_cachesize 0 2097152 0

# Sven Hartge reported that he had to set this value incredibly high
# to get slapd running at all. See http://bugs.debian.org/303057 for more
# information.

# Number of objects that can be locked at the same time.
dbconfig set_lk_max_objects 1500
# Number of locks (both requested and granted)
dbconfig set_lk_max_locks 1500
# Number of lockers
dbconfig set_lk_max_lockers 1500

# Indexing options for database #1
index           objectClass eq

# Save the time that the entry gets modified, for database #1
lastmod         on

# Checkpoint the BerkeleyDB database periodically in case of system
# failure and to speed slapd shutdown.
checkpoint      512 30

# Where to store the replica logs for database #1
# replogfile    /var/lib/ldap/replog
# The userPassword by default can be changed
# by the entry owning it if they are authenticated.
# Others should not be able to see it, except the
# admin entry below
# These access lines apply to database #1 only
access to attrs=userPassword,shadowLastChange
        by dn="cn=admin,dc=localdomain" write
        by anonymous auth
        by self write
        by * none

# Ensure read access to the base for things like
# supportedSASLMechanisms.  Without this you may
# have problems with SASL not knowing what
# mechanisms are available and the like.
# Note that this is covered by the 'access to *'
# ACL below too but if you change that as people
# are wont to do you'll still need this if you
# want SASL (and possible other things) to work
# happily.
access to dn.base="" by * read

# The admin dn has full write access, everyone else
# can read everything.
access to *
        by dn="cn=admin,dc=localdomain" write
        by * read

# For Netscape Roaming support, each user gets a roaming
# profile for which they have write access to
#access to dn=".*,ou=Roaming,o=morsnet"
#        by dn="cn=admin,dc=localdomain" write
#        by dnattr=owner write
#######################################################################
# Specific Directives for database #2, of type 'other' (can be hdb too):
# Database specific directives apply to this databasse until another
# 'database' directive occurs
#database        <other>

# The base of your directory for database #2
#suffix         "dc=debian,dc=org"

#######################################################################
# SSL:
# Uncomment the following lines to enable SSL and use the default
# snakeoil certificates.
#TLSCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem
#TLSCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key

TLSCipherSuite TLS_RSA_AES_256_CBC_SHA
TLSCACertificateFile /etc/ldap/ssl/server.pem
TLSCertificateFile /etc/ldap/ssl/server.pem
TLSCertificateKeyFile /etc/ldap/ssl/server.pem

#
# LDAP Defaults
#

# See ldap.conf(5) for details
# This file should be world readable but not world writable.

HOST ldap.natraj.com
PORT 636

BASE    dc=localdomain
URI     ldaps://ldap.natraj.com
TLS_CACERT    /etc/ldap/ssl/server.pem
TLS_REQCERT allow

#SIZELIMIT      12
#TIMELIMIT      15
#DEREF          never

TLSCipherSuite TLS_RSA_AES_256_CBC_SHA