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Introduce TLS 1.3 labels in a single place

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Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit is contained in:
Hanno Becker 2020-09-08 10:43:52 +01:00
parent 1981cb2972
commit e4435ea777
2 changed files with 33 additions and 37 deletions
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24
library/ssl_tls13_keys.c
View file

@ -28,30 +28,18 @@
#include <stdint.h>
#include <string.h>
#define LABEL( name, string ) \
.name = string,
struct mbedtls_ssl_tls1_3_labels_struct const mbedtls_ssl_tls1_3_labels =
{
/* This seems to work in C, despite the string literal being one
* character too long due to the 0-termination. */
.finished = "finished",
.resumption = "resumption",
.traffic_upd = "traffic upd",
.exporter = "exporter",
.key = "key",
.iv = "iv",
.sn = "sn",
.c_hs_traffic = "c hs traffic",
.c_ap_traffic = "c ap traffic",
.c_e_traffic = "c e traffic",
.s_hs_traffic = "s hs traffic",
.s_ap_traffic = "s ap traffic",
.s_e_traffic = "s e traffic",
.exp_master = "exp master",
.res_master = "res master",
.ext_binder = "ext binder",
.res_binder = "res binder",
.derived = "derived"
MBEDTLS_SSL_TLS1_3_LABEL_LIST
};
#undef LABEL
/*
* This function creates a HkdfLabel structure used in the TLS 1.3 key schedule.
*

46
library/ssl_tls13_keys.h
View file

@ -20,25 +20,31 @@
#define MBEDTLS_SSL_TLS1_3_KEYS_H
#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
#define MBEDTLS_SSL_TLS1_3_LABEL_LIST \
const unsigned char finished [ sizeof("finished") - 1 ]; \
const unsigned char resumption [ sizeof("resumption") - 1 ]; \
const unsigned char traffic_upd [ sizeof("traffic upd") - 1 ]; \
const unsigned char export [ sizeof("exporter") - 1 ]; \
const unsigned char key [ sizeof("key") - 1 ]; \
const unsigned char iv [ sizeof("iv") - 1 ]; \
const unsigned char sn [ sizeof("sn") - 1 ]; \
const unsigned char c_hs_traffic[ sizeof("c hs traffic") - 1 ]; \
const unsigned char c_ap_traffic[ sizeof("c ap traffic") - 1 ]; \
const unsigned char c_e_traffic [ sizeof("c e traffic") - 1 ]; \
const unsigned char s_hs_traffic[ sizeof("s hs traffic") - 1 ]; \
const unsigned char s_ap_traffic[ sizeof("s ap traffic") - 1 ]; \
const unsigned char s_e_traffic [ sizeof("s e traffic") - 1 ]; \
const unsigned char exp_master [ sizeof("exp master") - 1 ]; \
const unsigned char res_master [ sizeof("res master") - 1 ]; \
const unsigned char ext_binder [ sizeof("ext binder") - 1 ]; \
const unsigned char res_binder [ sizeof("res binder") - 1 ]; \
const unsigned char derived [ sizeof("derived") - 1 ]; \
/* This requires LABEL( name, string ) to be defined at the point of use.
* See e.g. the definition of mbedtls_ssl_tls1_3_labels_union below. */
#define MBEDTLS_SSL_TLS1_3_LABEL_LIST \
LABEL( finished , "finished" ) \
LABEL( resumption , "resumption" ) \
LABEL( traffic_upd , "traffic upd" ) \
LABEL( export , "exporter" ) \
LABEL( key , "key" ) \
LABEL( iv , "iv" ) \
LABEL( sn , "sn" ) \
LABEL( c_hs_traffic, "c hs traffic" ) \
LABEL( c_ap_traffic, "c ap traffic" ) \
LABEL( c_e_traffic , "c e traffic" ) \
LABEL( s_hs_traffic, "s hs traffic" ) \
LABEL( s_ap_traffic, "s ap traffic" ) \
LABEL( s_e_traffic , "s e traffic" ) \
LABEL( exp_master , "exp master" ) \
LABEL( res_master , "res master" ) \
LABEL( ext_binder , "ext binder" ) \
LABEL( res_binder , "res binder" ) \
LABEL( derived , "derived" )
#define LABEL( name, string ) \
const unsigned char name [ sizeof(string) - 1 ];
union mbedtls_ssl_tls1_3_labels_union
{
@ -48,6 +54,8 @@ struct mbedtls_ssl_tls1_3_labels_struct
{
MBEDTLS_SSL_TLS1_3_LABEL_LIST
};
#undef LABEL
extern const struct mbedtls_ssl_tls1_3_labels_struct mbedtls_ssl_tls1_3_labels;
#define MBEDTLS_SSL_TLS1_3_LBL_WITH_LEN( LABEL ) \