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authorIngela Anderton Andin <[email protected]>2017-03-22 14:49:22 +0100
committerIngela Anderton Andin <[email protected]>2017-05-06 07:31:16 +0200
commite9b0dbb4a95dbc8e328f08d6df6654dcbe13db09 (patch)
treeb64d031b0f0d78a56fb4d5b25efdab3477f64aa8 /lib/ssl/doc/src/ssl.xml
parent9ac8bdb19f55c593b8b4b10a5d72032e33bef406 (diff)
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ssl: Add hostname check of server certificate
When the server_name_indication is sent automatize the clients check of that the hostname is present in the servers certificate. Currently server_name_indication shall be on the dns_id format. If server_name_indication is disabled it is up to the user to do its own check in the verify_fun.
Diffstat (limited to 'lib/ssl/doc/src/ssl.xml')
-rw-r--r--lib/ssl/doc/src/ssl.xml22
1 files changed, 15 insertions, 7 deletions
diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml
index 2c09122fe6..2940ccb1e7 100644
--- a/lib/ssl/doc/src/ssl.xml
+++ b/lib/ssl/doc/src/ssl.xml
@@ -127,7 +127,7 @@
<item><p><c>hostname() | ipaddress()</c></p></item>
<tag><c>hostname() =</c></tag>
- <item><p><c>string()</c></p></item>
+ <item><p><c>string() - DNS hostname</c></p></item>
<tag><c>ip_address() =</c></tag>
<item><p><c>{N1,N2,N3,N4} % IPv4 | {K1,K2,K3,K4,K5,K6,K7,K8} % IPv6
@@ -249,7 +249,7 @@
be PEER, CA, ROOT-CA; if 2 the path can be PEER, CA, CA,
ROOT-CA, and so on. The default value is 1.</p></item>
- <tag><c>{verify_fun, {Verifyfun :: fun(), InitialUserState ::
+ <tag><marker id="verify_fun"/><c>{verify_fun, {Verifyfun :: fun(), InitialUserState ::
term()}}</c></tag>
<item><p>The verification fun is to be defined as follows:</p>
@@ -582,15 +582,23 @@ fun(srp, Username :: string(), UserState :: term()) ->
<item><p>Specifies the username and password to use to authenticate
to the server.</p></item>
- <tag><c>{server_name_indication, hostname()}</c></tag>
- <item><p>Can be specified when upgrading a TCP socket to a TLS
- socket to use the TLS Server Name Indication extension.</p></item>
+ <tag><c>{server_name_indication, HostName :: hostname()}</c></tag>
+ <item><p>Specify the hostname to be used in TLS Server Name Indication extension.
+ Is usefull when upgrading a TCP socket to a TLS socket or if the hostname can not be
+ derived from the Host argument to <seealso marker="ssl#connect-3">ssl:connect/3</seealso>.
+ Will also cause the client to preform host name verification of the peer certificate
+ <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname(PeerCert, [{dns_id, HostName}])</seealso>
+ </p> during the x509-path validation. If the check fails the error {bad_cert, hostname_check_failiure} will be
+ propagated to the path validation fun <seealso marker="#verify_fun">verify_fun</seealso>
+ </item>
<tag><c>{server_name_indication, disable}</c></tag>
<item>
<p>When starting a TLS connection without upgrade, the Server Name
- Indication extension is sent if possible. This option can be
- used to disable that behavior.</p>
+ Indication extension is sent if possible that is can be derived from the Host argument
+ to <seealso marker="ssl#connect-3">ssl:connect/3</seealso>.
+ This option can be used to disable that behavior.</p>
+ <note><p> Note that this also disables the default host name verification check of the peer certificate.</p></note>
</item>
<tag><c>{fallback, boolean()}</c></tag>
<item>