I have setup a rabbitmq ssl connection on my remote server as per the docs here: https://www.rabbitmq.com/ssl.html
I am using java rabbitmqclient to connect to the remote server and sending a hello message to a queue on rabbitmq-server, the connection works fine from my local ubuntu 14.04 machine but does not work from a centOS 6 machine.
Open SSL s_client command used:
openssl s_client -connect rabbitserver:5671 -cert cert.pem -key key.pem -CAfile cacert.pem
Open SSL output on ubuntu:
CONNECTED(00000003)
depth=1 CN = MyTestCA
verify return:1
depth=0 CN = LAP0078, O = server
verify return:1
---
Certificate chain
0 s:/CN=LAP0078/O=server
i:/CN=MyTestCA
1 s:/CN=MyTestCA
i:/CN=MyTestCA
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=/CN=LAP0078/O=server
issuer=/CN=MyTestCA
---
Acceptable client certificate CA names
/CN=MyTestCA
---
SSL handshake has read 2160 bytes and written 2298 bytes
---
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-SHA384
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES256-SHA384
Session-ID: 3DFE01EE903538C9084A8B9E7FDD68021106C1992DC35B313A7C86A3D4CE5579
Session-ID-ctx:
Master-Key: D64753633EC177935CB2E19A630DD6C8285779D02D52D480B9CE2265658D92F5F827C62E5BE3B816CF3A2E14BFEB547B
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1519115155
Timeout : 300 (sec)
Verify return code: 0 (ok)
---
closed
Openssl output on CentOS:
CONNECTED(00000003)
SSL_connect:before/connect initialization
write to 0x8256ab0 [0x82573f0] (247 bytes => -1 (0xFFFFFFFF))
SSL_connect:error in SSLv2/v3 write client hello B
write:errno=104
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 0 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
---
SSL Output of java process:
Ignoring unavailable cipher suite: TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
Ignoring unavailable cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA
Ignoring unavailable cipher suite: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
Ignoring unavailable cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
Ignoring unavailable cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
Ignoring unavailable cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256
Ignoring unavailable cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA
Ignoring unavailable cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
Ignoring unavailable cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
Ignoring unavailable cipher suite: TLS_RSA_WITH_AES_256_GCM_SHA384
Ignoring unavailable cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
Ignoring unavailable cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
Ignoring unavailable cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
Ignoring unavailable cipher suite: TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
Ignoring unavailable cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
Ignoring unavailable cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
Ignoring unavailable cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
Ignoring unavailable cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
Ignoring unavailable cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA
Ignoring unavailable cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
Ignoring unavailable cipher suite: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
Allow unsafe renegotiation: false
Allow legacy hello messages: true
Is initial handshake: true
Is secure renegotiation: false
pool-2-thread-1, setSoTimeout(10000) called
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256 for TLSv1
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 for TLSv1
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 for TLSv1
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1.1
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1.1
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 for TLSv1.1
%% No cached client session
*** ClientHello, TLSv1.2
RandomCookie: GMT: 1502197153 bytes = { 240, 9, 18, 141, 86, 242, 197, 223, 248, 4, 162, 202, 246, 53, 139, 10, 48, 117, 190, 160, 172, 78, 177, 16, 228, 123, 156, 90 }
Session ID: {}
Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA, SSL_RSA_WITH_RC4_128_SHA, TLS_ECDH_ECDSA_WITH_RC4_128_SHA, TLS_ECDH_RSA_WITH_RC4_128_SHA, SSL_RSA_WITH_RC4_128_MD5, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
Compression Methods: { 0 }
Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1}
Extension ec_point_formats, formats: [uncompressed]
Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA
***
pool-2-thread-1, WRITE: TLSv1.2 Handshake, length = 207
pool-2-thread-1, waiting for close_notify or alert: state 1
pool-2-thread-1, Exception while waiting for close java.net.SocketException: Connection reset
pool-2-thread-1, handling exception: java.net.SocketException: Connection reset
pool-2-thread-1, SEND TLSv1.2 ALERT: fatal, description = unexpected_message
pool-2-thread-1, WRITE: TLSv1.2 Alert, length = 2
pool-2-thread-1, Exception sending alert: java.net.SocketException: Broken pipe
pool-2-thread-1, called closeSocket()
pool-2-thread-1, called close()
pool-2-thread-1, called closeInternal(true)
Jar/Package versions:
How can I establish the connection from my centOS machine?
I believe your issue is with Java, you need to install the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files, as by default the java installed has only limited strength enabled (apparently to allow for worldwide distribution - special local legal requirements)
Due to import control restrictions of some countries, the version of the JCE policy files that are bundled in the Java Runtime Environment, or JRE(TM), 8 environment allow "strong" but limited cryptography to be used. This download bundle (the one including this README file) provides "unlimited strength" policy files which contain no restrictions on cryptographic strengths.
This thought comes from the comparison of the 2 connection attempts, the successful one states:
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-SHA384
While the failing one states (amongst others):
Ignoring unavailable cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
Ignoring unavailable cipher suite: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
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