X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=docs%2FSSL-PROBLEMS;h=7ee4d14ee3a73a655f19a6ce946b1a83cc11fd70;hb=7a9f915fa6be8c8955ff2c59169538a4d0349080;hp=45faa241c5d8391240dd300ffa0d6b76c1f20752;hpb=2bc9d6bb53df44a0c5174767de734620c2cdfd9e;p=platform%2Fupstream%2Fcurl.git diff --git a/docs/SSL-PROBLEMS b/docs/SSL-PROBLEMS index 45faa24..7ee4d14 100644 --- a/docs/SSL-PROBLEMS +++ b/docs/SSL-PROBLEMS @@ -26,7 +26,7 @@ CA bundle missing intermediate certificates problems if your CA cert does not have the certificates for the intermediates in the whole trust chain. -Protocol version +SSL version Some broken servers fail to support the protocol negotiation properly that SSL servers are supposed to handle. This may cause the connection to fail @@ -36,9 +36,7 @@ Protocol version An additional complication can be that modern SSL libraries sometimes are built with support for older SSL and TLS versions disabled! - All versions of SSL are considered insecure and should be avoided. Use TLS. - -Ciphers +SSL ciphers Clients give servers a list of ciphers to select from. If the list doesn't include any ciphers the server wants/can use, the connection handshake @@ -53,13 +51,9 @@ Ciphers Note that these weak ciphers are identified as flawed. For example, this includes symmetric ciphers with less than 128 bit keys and RC4. - WinSSL in Windows XP is not able to connect to servers that no longer - support the legacy handshakes and algorithms used by those versions, so we - advice against building curl to use WinSSL on really old Windows versions. - References: - https://tools.ietf.org/html/draft-popov-tls-prohibiting-rc4-01 + http://tools.ietf.org/html/draft-popov-tls-prohibiting-rc4-01 Allow BEAST @@ -71,17 +65,3 @@ Allow BEAST introduced. Exactly as it sounds, it re-introduces the BEAST vulnerability but on the other hand it allows curl to connect to that kind of strange servers. - -Disabling certificate revocation checks - - Some SSL backends may do certificate revocation checks (CRL, OCSP, etc) - depending on the OS or build configuration. The --ssl-no-revoke option was - introduced in 7.44.0 to disable revocation checking but currently is only - supported for WinSSL (the native Windows SSL library), with an exception in - the case of Windows' Untrusted Publishers blacklist which it seems can't be - bypassed. This option may have broader support to accommodate other SSL - backends in the future. - - References: - - http://curl.haxx.se/docs/ssl-compared.html