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Allow configuring MBEDTLS_TLS_EXT_CID at compile time

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The numerical identifier of the CID extension hasn't been settled yet
and different implementations use values from different drafts. Allow
configuring the value at compile time.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-04-24 13:35:41 +02:00
parent b5939e814e
commit 065a1c8e3d
4 changed files with 29 additions and 1 deletions
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3
ChangeLog.d/tls_ext_cid-config.txt Normal file
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@ -0,0 +1,3 @@
Features
* The identifier of the CID TLS extension can be configured by defining
MBEDTLS_TLS_EXT_CID at compile time.

11
include/mbedtls/config.h
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@ -3863,6 +3863,17 @@
//#define MBEDTLS_PSK_MAX_LEN 32 /**< Max size of TLS pre-shared keys, in bytes (default 256 bits) */ //#define MBEDTLS_PSK_MAX_LEN 32 /**< Max size of TLS pre-shared keys, in bytes (default 256 bits) */
//#define MBEDTLS_SSL_COOKIE_TIMEOUT 60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */ //#define MBEDTLS_SSL_COOKIE_TIMEOUT 60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
/** \def MBEDTLS_TLS_EXT_CID
*
* At the time of writing, the CID extension has not been assigned its
* final value. Set this configuration option to make Mbed TLS use a
* different value.
*
* A future minor revision of Mbed TLS may change the default value of
* this option to match evolving standards and usage.
*/
//#define MBEDTLS_TLS_EXT_CID 254
/** /**
* Complete list of ciphersuites to use, in order of preference. * Complete list of ciphersuites to use, in order of preference.
* *

8
include/mbedtls/ssl.h
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@ -412,8 +412,14 @@
/* The value of the CID extension is still TBD as of /* The value of the CID extension is still TBD as of
* draft-ietf-tls-dtls-connection-id-05 * draft-ietf-tls-dtls-connection-id-05
* (https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05) */ * (https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05).
*
* A future minor revision of Mbed TLS may change the default value of
* this option to match evolving standards and usage.
*/
#if !defined(MBEDTLS_TLS_EXT_CID)
#define MBEDTLS_TLS_EXT_CID 254 /* TBD */ #define MBEDTLS_TLS_EXT_CID 254 /* TBD */
#endif
#define MBEDTLS_TLS_EXT_ECJPAKE_KKPP 256 /* experimental */ #define MBEDTLS_TLS_EXT_ECJPAKE_KKPP 256 /* experimental */

8
programs/test/query_config.c
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@ -2762,6 +2762,14 @@ int query_config( const char *config )
} }
#endif /* MBEDTLS_SSL_COOKIE_TIMEOUT */ #endif /* MBEDTLS_SSL_COOKIE_TIMEOUT */
#if defined(MBEDTLS_TLS_EXT_CID)
if( strcmp( "MBEDTLS_TLS_EXT_CID", config ) == 0 )
{
MACRO_EXPANSION_TO_STR( MBEDTLS_TLS_EXT_CID );
return( 0 );
}
#endif /* MBEDTLS_TLS_EXT_CID */
#if defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA) #if defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA)
if( strcmp( "MBEDTLS_X509_MAX_INTERMEDIATE_CA", config ) == 0 ) if( strcmp( "MBEDTLS_X509_MAX_INTERMEDIATE_CA", config ) == 0 )
{ {