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tinyCrypt: Write client's key share

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This commit is contained in:
Hanno Becker 2019-07-23 17:01:13 +01:00
parent a3c2c1712c
commit 621113fd3a
1 changed files with 11 additions and 7 deletions
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18
library/ssl_cli.c
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@ -3562,9 +3562,13 @@ static int ssl_out_client_key_exchange_write( mbedtls_ssl_context *ssl,
#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED */ #endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED */
#if defined(MBEDTLS_USE_TINYCRYPT) #if defined(MBEDTLS_USE_TINYCRYPT)
if( mbedtls_ssl_suite_get_key_exchange( ciphersuite_info ) if( mbedtls_ssl_suite_get_key_exchange( ciphersuite_info )
== MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA) == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA ||
mbedtls_ssl_suite_get_key_exchange( ciphersuite_info )
== MBEDTLS_KEY_EXCHANGE_ECDHE_RSA )
{ {
const struct uECC_Curve_t * uecc_curve = uECC_secp256r1(); const struct uECC_Curve_t * uecc_curve = uECC_secp256r1();
((void) n);
((void) ret);
if( !uECC_make_key( ssl->handshake->ecdh_ownpubkey, if( !uECC_make_key( ssl->handshake->ecdh_ownpubkey,
ssl->handshake->ecdh_privkey, ssl->handshake->ecdh_privkey,
@ -3573,13 +3577,13 @@ static int ssl_out_client_key_exchange_write( mbedtls_ssl_context *ssl,
return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
} }
/* TODO: Write the client share. */ if( (size_t)( end - p ) < 2 * NUM_ECC_BYTES + 2 )
((void) p); return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
((void) end);
((void) ret);
((void) n);
mbedtls_platform_zeroize( ssl->handshake->ecdh_privkey, NUM_ECC_BYTES ); *p++ = 2 * NUM_ECC_BYTES + 1;
*p++ = 0x04; /* uncompressed point presentation */
memcpy( p, ssl->handshake->ecdh_ownpubkey, 2 * NUM_ECC_BYTES );
p += 2 * NUM_ECC_BYTES;
} }
else else
#elif defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \ #elif defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \