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Code Issues Releases Wiki Activity

SSL-PROBLEMS: mention WinSSL problems in WinXP

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This commit is contained in:
Daniel Stenberg 2015-06-29 15:03:56 +02:00
parent 0c46abd79a
commit 8208dd3b22
1 changed files with 8 additions and 2 deletions
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docs/SSL-PROBLEMS
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@ -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.
SSL version
Protocol 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
@ -36,7 +36,9 @@ SSL version
An additional complication can be that modern SSL libraries sometimes are
built with support for older SSL and TLS versions disabled!
SSL ciphers
All versions of SSL are considered insecure and should be avoided. Use TLS.
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
@ -51,6 +53,10 @@ SSL 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