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add key_share extension

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Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
This commit is contained in:
Jerry Yu
2021-09-01 17:48:49 +08:00
parent 7236994aa9
commit 56fc07f7ae
3 changed files with 308 additions and 14 deletions
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85
library/ecdh.c
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@ -31,6 +31,7 @@
#include "mbedtls/ecdh.h"
#include "mbedtls/platform_util.h"
#include "mbedtls/error.h"
#include "ssl_misc.h"
#include <string.h>
@ -726,4 +727,88 @@ int mbedtls_ecdh_calc_secret( mbedtls_ecdh_context *ctx, size_t *olen,
#endif
}
#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
static int ecdh_tls13_make_params_internal( mbedtls_ecdh_context_mbed *ctx,
size_t *olen, int point_format,
unsigned char *buf, size_t blen,
int ( *f_rng )( void *,
unsigned char *,
size_t),
void *p_rng, int restart_enabled )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
#if defined(MBEDTLS_ECP_RESTARTABLE)
mbedtls_ecp_restart_ctx *rs_ctx = NULL;
#endif
if( ctx->grp.pbits == 0 )
return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
#if defined(MBEDTLS_ECP_RESTARTABLE)
if( restart_enabled )
rs_ctx = &ctx->rs;
#else
(void) restart_enabled;
#endif
#if defined(MBEDTLS_ECP_RESTARTABLE)
if( ( ret = ecdh_gen_public_restartable( &ctx->grp, &ctx->d, &ctx->Q,
f_rng, p_rng, rs_ctx ) ) != 0 )
return( ret );
#else
if( ( ret = mbedtls_ecdh_gen_public( &ctx->grp, &ctx->d, &ctx->Q,
f_rng, p_rng ) ) != 0 )
return( ret );
#endif /* MBEDTLS_ECP_RESTARTABLE */
ret = mbedtls_ecp_point_write_binary( &ctx->grp, &ctx->Q, point_format,
olen, buf, blen );
if( ret != 0 )
return( ret );
return( 0 );
}
int mbedtls_ecdh_tls13_make_params( mbedtls_ecdh_context *ctx, size_t *olen,
unsigned char *buf, size_t blen,
int ( *f_rng )( void *, unsigned char *, size_t ),
void *p_rng )
{
int restart_enabled = 0;
ECDH_VALIDATE_RET( ctx != NULL );
ECDH_VALIDATE_RET( olen != NULL );
ECDH_VALIDATE_RET( buf != NULL );
ECDH_VALIDATE_RET( f_rng != NULL );
#if defined(MBEDTLS_ECP_RESTARTABLE)
restart_enabled = ctx->restart_enabled;
#else
(void) restart_enabled;
#endif
#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
return( ecdh_tls13_make_params_internal( ctx, olen, ctx->point_format, buf, blen,
f_rng, p_rng, restart_enabled ) );
#else
switch( ctx->var )
{
#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
case MBEDTLS_ECDH_VARIANT_EVEREST:
return( mbedtls_everest_make_params( &ctx->ctx.everest_ecdh, olen,
buf, blen, f_rng, p_rng ) );
#endif
case MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0:
return( ecdh_tls13_make_params_internal( &ctx->ctx.mbed_ecdh, olen,
ctx->point_format, buf, blen,
f_rng, p_rng,
restart_enabled ) );
default:
return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
}
#endif
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
#endif /* MBEDTLS_ECDH_C */