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Diffstat (limited to 'secure/lib/libcrypto/man/SSL_CTX_set_options.3')
| -rw-r--r-- | secure/lib/libcrypto/man/SSL_CTX_set_options.3 | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/secure/lib/libcrypto/man/SSL_CTX_set_options.3 b/secure/lib/libcrypto/man/SSL_CTX_set_options.3 deleted file mode 100644 index 77d9e08..0000000 --- a/secure/lib/libcrypto/man/SSL_CTX_set_options.3 +++ /dev/null @@ -1,321 +0,0 @@ -.\" Automatically generated by Pod::Man version 1.15 -.\" Tue Jul 30 09:22:26 2002 -.\" -.\" Standard preamble: -.\" ====================================================================== -.de Sh \" Subsection heading -.br -.if t .Sp -.ne 5 -.PP -\fB\\$1\fR -.PP -.. -.de Sp \" Vertical space (when we can't use .PP) -.if t .sp .5v -.if n .sp -.. -.de Ip \" List item -.br -.ie \\n(.$>=3 .ne \\$3 -.el .ne 3 -.IP "\\$1" \\$2 -.. -.de Vb \" Begin verbatim text -.ft CW -.nf -.ne \\$1 -.. -.de Ve \" End verbatim text -.ft R - -.fi -.. -.\" Set up some character translations and predefined strings. \*(-- will -.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left -.\" double quote, and \*(R" will give a right double quote. | will give a -.\" real vertical bar. \*(C+ will give a nicer C++. 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Options can only be added but can never be reset. -.PP -\&\fISSL_CTX_set_options()\fR and \fISSL_set_options()\fR affect the (external) -protocol behaviour of the \s-1SSL\s0 library. The (internal) behaviour of -the \s-1API\s0 can be changed by using the similar -SSL_CTX_set_mode(3) and \fISSL_set_mode()\fR functions. -.PP -During a handshake, the option settings of the \s-1SSL\s0 object are used. When -a new \s-1SSL\s0 object is created from a context using \fISSL_new()\fR, the current -option setting is copied. Changes to \fBctx\fR do not affect already created -\&\s-1SSL\s0 objects. \fISSL_clear()\fR does not affect the settings. -.PP -The following \fBbug workaround\fR options are available: -.Ip "\s-1SSL_OP_MICROSOFT_SESS_ID_BUG\s0" 4 -.IX Item "SSL_OP_MICROSOFT_SESS_ID_BUG" -www.microsoft.com \- when talking SSLv2, if session-id reuse is -performed, the session-id passed back in the server-finished message -is different from the one decided upon. -.Ip "\s-1SSL_OP_NETSCAPE_CHALLENGE_BUG\s0" 4 -.IX Item "SSL_OP_NETSCAPE_CHALLENGE_BUG" -Netscape-Commerce/1.12, when talking SSLv2, accepts a 32 byte -challenge but then appears to only use 16 bytes when generating the -encryption keys. Using 16 bytes is ok but it should be ok to use 32. -According to the SSLv3 spec, one should use 32 bytes for the challenge -when operating in SSLv2/v3 compatibility mode, but as mentioned above, -this breaks this server so 16 bytes is the way to go. -.Ip "\s-1SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG\s0" 4 -.IX Item "SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG" -ssl3.netscape.com:443, first a connection is established with \s-1RC4\-MD5\s0. -If it is then resumed, we end up using \s-1DES-CBC3\-SHA\s0. It should be -\&\s-1RC4\-MD5\s0 according to 7.6.1.3, 'cipher_suite'. -.Sp -Netscape-Enterprise/2.01 (https://merchant.netscape.com) has this bug. -It only really shows up when connecting via SSLv2/v3 then reconnecting -via SSLv3. The cipher list changes.... -.Sp -\&\s-1NEW\s0 \s-1INFORMATION\s0. Try connecting with a cipher list of just -\&\s-1DES-CBC-SHA:RC4\-MD5\s0. For some weird reason, each new connection uses -\&\s-1RC4\-MD5\s0, but a re-connect tries to use \s-1DES-CBC-SHA\s0. So netscape, when -doing a re-connect, always takes the first cipher in the cipher list. -.Ip "\s-1SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG\s0" 4 -.IX Item "SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG" -\&... -.Ip "\s-1SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER\s0" 4 -.IX Item "SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER" -\&... -.Ip "\s-1SSL_OP_MSIE_SSLV2_RSA_PADDING\s0" 4 -.IX Item "SSL_OP_MSIE_SSLV2_RSA_PADDING" -\&... -.Ip "\s-1SSL_OP_SSLEAY_080_CLIENT_DH_BUG\s0" 4 -.IX Item "SSL_OP_SSLEAY_080_CLIENT_DH_BUG" -\&... -.Ip "\s-1SSL_OP_TLS_D5_BUG\s0" 4 -.IX Item "SSL_OP_TLS_D5_BUG" -\&... -.Ip "\s-1SSL_OP_TLS_BLOCK_PADDING_BUG\s0" 4 -.IX Item "SSL_OP_TLS_BLOCK_PADDING_BUG" -\&... -.Ip "\s-1SSL_OP_TLS_ROLLBACK_BUG\s0" 4 -.IX Item "SSL_OP_TLS_ROLLBACK_BUG" -Disable version rollback attack detection. -.Sp -During the client key exchange, the client must send the same information -about acceptable \s-1SSL/TLS\s0 protocol levels as during the first hello. Some -clients violate this rule by adapting to the server's answer. (Example: -the client sends a SSLv2 hello and accepts up to SSLv3.1=TLSv1, the server -only understands up to SSLv3. In this case the client must still use the -same SSLv3.1=TLSv1 announcement. Some clients step down to SSLv3 with respect -to the server's answer and violate the version rollback protection.) -.Ip "\s-1SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS\s0" 4 -.IX Item "SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS" -Disables a countermeasure against a \s-1SSL\s0 3.0/TLS 1.0 protocol -vulnerability affecting \s-1CBC\s0 ciphers, which cannot be handled by some -broken \s-1SSL\s0 implementations. This option has no effect for connections -using other ciphers. -.Ip "\s-1SSL_OP_ALL\s0" 4 -.IX Item "SSL_OP_ALL" -All of the above bug workarounds. -.PP -It is usually safe to use \fB\s-1SSL_OP_ALL\s0\fR to enable the bug workaround -options if compatibility with somewhat broken implementations is -desired. -.PP -The following \fBmodifying\fR options are available: -.Ip "\s-1SSL_OP_SINGLE_DH_USE\s0" 4 -.IX Item "SSL_OP_SINGLE_DH_USE" -Always create a new key when using temporary/ephemeral \s-1DH\s0 parameters -(see SSL_CTX_set_tmp_dh_callback(3)). -This option must be used to prevent small subgroup attacks, when -the \s-1DH\s0 parameters were not generated using \*(L"strong\*(R" primes -(e.g. when using DSA-parameters, see dhparam(1)). -If \*(L"strong\*(R" primes were used, it is not strictly necessary to generate -a new \s-1DH\s0 key during each handshake but it is also recommended. -\&\s-1SSL_OP_SINGLE_DH_USE\s0 should therefore be enabled whenever -temporary/ephemeral \s-1DH\s0 parameters are used. -.Ip "\s-1SSL_OP_EPHEMERAL_RSA\s0" 4 -.IX Item "SSL_OP_EPHEMERAL_RSA" -Always use ephemeral (temporary) \s-1RSA\s0 key when doing \s-1RSA\s0 operations -(see SSL_CTX_set_tmp_rsa_callback(3)). -According to the specifications this is only done, when a \s-1RSA\s0 key -can only be used for signature operations (namely under export ciphers -with restricted \s-1RSA\s0 keylength). By setting this option, ephemeral -\&\s-1RSA\s0 keys are always used. This option breaks compatibility with the -\&\s-1SSL/TLS\s0 specifications and may lead to interoperability problems with -clients and should therefore never be used. Ciphers with \s-1EDH\s0 (ephemeral -Diffie-Hellman) key exchange should be used instead. -.Ip "\s-1SSL_OP_PKCS1_CHECK_1\s0" 4 -.IX Item "SSL_OP_PKCS1_CHECK_1" -\&... -.Ip "\s-1SSL_OP_PKCS1_CHECK_2\s0" 4 -.IX Item "SSL_OP_PKCS1_CHECK_2" -\&... -.Ip "\s-1SSL_OP_NETSCAPE_CA_DN_BUG\s0" 4 -.IX Item "SSL_OP_NETSCAPE_CA_DN_BUG" -If we accept a netscape connection, demand a client cert, have a -non-self-sighed \s-1CA\s0 which does not have it's \s-1CA\s0 in netscape, and the -browser has a cert, it will crash/hang. Works for 3.x and 4.xbeta -.Ip "\s-1SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG\s0" 4 -.IX Item "SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG" -\&... -.Ip "SSL_OP_NO_SSLv2" 4 -.IX Item "SSL_OP_NO_SSLv2" -Do not use the SSLv2 protocol. -.Ip "SSL_OP_NO_SSLv3" 4 -.IX Item "SSL_OP_NO_SSLv3" -Do not use the SSLv3 protocol. -.Ip "SSL_OP_NO_TLSv1" 4 -.IX Item "SSL_OP_NO_TLSv1" -Do not use the TLSv1 protocol. -.SH "RETURN VALUES" -.IX Header "RETURN VALUES" -\&\fISSL_CTX_set_options()\fR and \fISSL_set_options()\fR return the new options bitmask -after adding \fBoptions\fR. -.PP -\&\fISSL_CTX_get_options()\fR and \fISSL_get_options()\fR return the current bitmask. -.SH "SEE ALSO" -.IX Header "SEE ALSO" -ssl(3), SSL_new(3), SSL_clear(3), -SSL_CTX_set_tmp_dh_callback(3), -SSL_CTX_set_tmp_rsa_callback(3), -dhparam(1) -.SH "HISTORY" -.IX Header "HISTORY" -\&\s-1SSL_OP_TLS_ROLLBACK_BUG\s0 has been added in OpenSSL 0.9.6. -.PP -\&\fB\s-1SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS\s0\fR has been added in OpenSSL 0.9.6e. -Versions up to OpenSSL 0.9.6c do not include the countermeasure that -can be disabled with this option (in OpenSSL 0.9.6d, it was always -enabled). |
