bagder/curl — pull request #48 by okoeroo (2012-11-08 10:06:13+00:00)
Title: Adding RFC2818 compliance to axTLS, CyaSSL and other SSL-backend related fixes, e.g. making PolarSSL usable again.

axTLS:
This will make the axTLS backend perform the RFC2818 checks, honoring the VERIFYHOST setting similar to the OpenSSL backend.

Generic for OpenSSL and axTLS:
Also move the hostcheck and cert_hostcheck functions from the lib/ssluse.c files to make them genericly available for both the OpenSSL, axTLS and other SSL backends in the near future. Currently these are now in the lib/rawstr.c but will be moved later in a separate file.

CyaSSL:
CyaSSL has the RFC2818 checks also enabled now by default. There is a limitation that the verifyhost can not be enabled exclusively on the Subject CN field comparison. This SSL backend will thus behave like the NSS and the GnuTLS (meaning: RFC2818 ok, or bust). In other words: setting verifyhost to 0 or 1 will disable the Subject Alt Names checks too.

Schannel:
Updated the schannel information messages: Split the IP address usage message from the verifyhost setting and changed the message about disabling SNI (Server Name Indication, used in HTTP virtual hosting) into a message stating that the Subject Alternative Names checks are being disabled when verifyhost is set to 0 or 1. As a side effect of switching off the RFC2818 related servername checks with SCH_CRED_NO_SERVERNAME_CHECK (http://msdn.microsoft.com/en-us/library/aa923430.aspx) the SNI feature is being disabled. This effect is not documented in MSDN, but Wireshark output clearly shows the effect (details on the libcurl maillist).

PolarSSL:
Fix the prototype change in PolarSSL of ssl_set_session() and the move of the peer_cert from the ssl_context to the ssl_session. Found this change in the PolarSSL SVN between r1316 and r1317 where the POLARSSL_VERSION_NUMBER was at 0x01010100. But to accommodate the Ubuntu PolarSSL version 1.1.4 the check is to discriminate between lower then PolarSSL version 1.2.0 and 1.2.0 and higher. Note: The PolarSSL SVN trunk jumped from version 1.1.1 to 1.2.0.

curl tool:
Sets a CURLOPT_SSL_VERIFYHOST value of 0L.

Generic:
All the SSL backends are fixed and checked to work with the ssl.verifyhost as a boolean, which is an internal API change.