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TinyCrypt ECDHE-PSK: Implement ClientKeyExchange writing

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This commit is contained in:
Hanno Becker 2019-09-02 09:47:05 +01:00
parent c7effc04c1
commit d91ede14c4
1 changed files with 19 additions and 0 deletions
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19
library/ssl_cli.c
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@ -3758,6 +3758,24 @@ static int ssl_out_client_key_exchange_write( mbedtls_ssl_context *ssl,
if( mbedtls_ssl_suite_get_key_exchange( ciphersuite_info )
== MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
{
#if defined(MBEDTLS_USE_TINYCRYPT)
const struct uECC_Curve_t * uecc_curve = uECC_secp256r1();
((void) n);
((void) ret);
if( (size_t)( end - p ) < 2 * NUM_ECC_BYTES + 2 )
return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
*p++ = 2 * NUM_ECC_BYTES + 1;
*p++ = 0x04; /* uncompressed point presentation */
if( !uECC_make_key( p, ssl->handshake->ecdh_privkey,
uecc_curve ) )
{
return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
}
p += 2 * NUM_ECC_BYTES;
#else /* MBEDTLS_USE_TINYCRYPT */
/*
* ClientECDiffieHellmanPublic public;
*/
@ -3773,6 +3791,7 @@ static int ssl_out_client_key_exchange_write( mbedtls_ssl_context *ssl,
MBEDTLS_SSL_DEBUG_ECP( 3, "ECDH: Q", &ssl->handshake->ecdh_ctx.Q );
p += n;
#endif /* MBEDTLS_USE_TINYCRYPT */
}
else
#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */