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Set TLS padding extension value.

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Enable TLS padding extension using official value from:

http://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml
(cherry picked from commit cd6bd5ffda)

Conflicts:

	CHANGES
This commit is contained in:
Dr. Stephen Henson 2014-04-05 20:43:54 +01:00
parent bb98beade9
commit 6411b83e52
3 changed files with 8 additions and 12 deletions
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12
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@ -17,23 +17,13 @@
this fixes a limiation in previous versions of OpenSSL.
[Steve Henson]
*) TLS pad extension: draft-agl-tls-padding-02
*) TLS pad extension: draft-agl-tls-padding-03
Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
TLS client Hello record length value would otherwise be > 255 and
less that 512 pad with a dummy extension containing zeroes so it
is at least 512 bytes long.
To enable it use an unused extension number (for example chrome uses
35655) using:
e.g. -DTLSEXT_TYPE_padding=35655
Since the extension is ignored the actual number doesn't matter as long
as it doesn't clash with any existing extension.
This will be updated when the extension gets an official number.
[Adam Langley, Steve Henson]
*) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,

2
ssl/t1_lib.c
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@ -1471,7 +1471,7 @@ unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned cha
#ifdef TLSEXT_TYPE_padding
/* Add padding to workaround bugs in F5 terminators.
* See https://tools.ietf.org/html/draft-agl-tls-padding-02
* See https://tools.ietf.org/html/draft-agl-tls-padding-03
*
* NB: because this code works out the length of all existing
* extensions it MUST always appear last.

6
ssl/tls1.h
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@ -233,6 +233,12 @@ extern "C" {
/* ExtensionType value from draft-ietf-tls-applayerprotoneg-00 */
#define TLSEXT_TYPE_application_layer_protocol_negotiation 16
/* ExtensionType value for TLS padding extension.
* http://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml
* http://tools.ietf.org/html/draft-agl-tls-padding-03
*/
#define TLSEXT_TYPE_padding 21
/* ExtensionType value from RFC4507 */
#define TLSEXT_TYPE_session_ticket 35