7085 2014-12-16 07:24:15 +0000 openssl: compile openSSL with OPENSSL_NO_SSL3 flag 2015-02-23 17:16:51 +0000 1 1 7 Build System, Metadata & Runtime OE-Core connectivity 1.7 All Multiple RESOLVED FIXED Backport 1.7.1 Medium normal 1.8 M3 1 sona.sarmadi brendan.le.foll jessica.zhang meta.mr.watcher meta.watcher sgw --- --- Yes (doc changes required) oldest_to_newest 47586 0 sona.sarmadi 2014-12-16 07:24:15 +0000 To disable SSLv3 in Python (7015), OpenSSL needs to be compiled with the OPENSSL_NO_SSL3 flag. See https://docs.python.org/2/library/ssl.html ssl.PROTOCOL_SSLv3 Selects SSL version 3 as the channel encryption protocol. This protocol is not be available if OpenSSL is compiled with the OPENSSL_NO_SSLv3 flag. ==================================== SSLV3 support can be disabled in openssl by adding "-no-ssl3" in the openssl recipes: meta/recipes-connectivity/openssl/openssl_1.0.1g.bb: EXTRA_OECONF = " -no-ssl2 -no-ssl3" After building openssl this define is in the include/openssl/opensslconf.h: #ifndef OPENSSL_NO_SSL3 # define OPENSSL_NO_SSL3 #endif Openssl compiled with this define: =================================== root@p2020rdb:~# openssl s_client -connect 173.252.120.6:443 -ssl3 unknown option -ssl3 usage: s_client args ...... root@p2020rdb:~# openssl s_client -connect 173.252.120.6:443 -tls1 CONNECTED(00000003) depth=1 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert High Assurance CA-3 verify error:num=20:unable to get local issuer certificate verify return:0 --- Certificate chain 0 s:/C=US/ST=CA/L=Menlo Park/O=Facebook, Inc./CN=*.facebook.com i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance CA-3 1 s:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance CA-3 i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCer Openssl NOT compiled with this define: ======================================= root@p2020rdb:~# openssl s_client -connect 173.252.120.6:443 -ssl3 CONNECTED(00000003) 3079103692:error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure:s3_pkt.c:1292:SSL alert number 40 3079103692:error:1409E0E5:SSL routines:SSL3_WRITE_BYTES:ssl handshake failure:s3_pkt.c:615: --- no peer certificate available --- No client certificate CA names sent --- SSL handshake has read 7 bytes and written 0 bytes --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE SSL-Session: Protocol : SSLv3 Cipher : 0000 Session-ID: Session-ID-ctx: Master-Key: Key-Arg : None PSK identity: None PSK identity hint: None SRP username: None Start Time: 1418713871 Timeout : 7200 (sec) Verify return code: 0 (ok) --- root@p2020rdb:~# It would be good to document this 48992 1 brendan.le.foll 2015-02-23 17:16:51 +0000 Fix pushed with 0a5395738b0c5c41e48b882a5fb7c671b98dc732