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Put X25519 behind P256

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Option to have X25519 prioritized.
Show curve name and DH key size in TLS v1.3.
This commit is contained in:
Sean Parkinson
2017-05-19 10:58:43 +10:00
parent 63a6618feb
commit 5ef977aa3d
3 changed files with 67 additions and 28 deletions
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57
examples/client/client.c
View File

@ -628,6 +628,9 @@ static void Usage(void)
#ifdef HAVE_ECC
printf("-Y Key Share with ECC named groups only\n");
#endif
#ifdef HAVE_CURVE25519
printf("-t Use X25519 for key exchange\n");
#endif
#endif /* WOLFSSL_TLS13 */
}
@ -732,6 +735,9 @@ THREAD_RETURN WOLFSSL_THREAD client_test(void* args)
int useOcsp = 0;
char* ocspUrl = NULL;
#endif
#ifdef HAVE_CURVE25519
int useX25519 = 0;
#endif
#ifdef HAVE_WNR
const char* wnrConfigFile = wnrConfig;
@ -771,7 +777,7 @@ THREAD_RETURN WOLFSSL_THREAD client_test(void* args)
#ifndef WOLFSSL_VXWORKS
/* Not used: t, Q */
while ((ch = mygetopt(argc, argv, "?"
"ab:c:defgh:ijk:l:mnop:q:rsuv:wxyz"
"ab:c:defgh:ijk:l:mnop:q:rstuv:wxyz"
"A:B:CDE:F:GHIJKL:M:NO:PRS:TUVW:XYZ:")) != -1) {
switch (ch) {
case '?' :
@ -1076,6 +1082,12 @@ THREAD_RETURN WOLFSSL_THREAD client_test(void* args)
useVerifyCb = 1;
break;
case 't' :
#ifdef HAVE_CURVE25519
useX25519 = 1;
#endif
break;
default:
Usage();
exit(MY_EX_USAGE);
@ -1493,16 +1505,20 @@ THREAD_RETURN WOLFSSL_THREAD client_test(void* args)
wolfSSL_KeepArrays(ssl);
#endif
#ifdef HAVE_CURVE25519
if (useX25519)
wolfSSL_UseSupportedCurve(ssl, WOLFSSL_ECC_X25519);
#endif
#ifdef WOLFSSL_TLS13
if (!helloRetry) {
if (onlyKeyShare == 0 || onlyKeyShare == 1) {
#ifdef HAVE_FFDHE_2048
if (wolfSSL_UseKeyShare(ssl, WOLFSSL_FFDHE_2048) != SSL_SUCCESS) {
err_sys("unable to use DH 2048-bit parameters");
}
#endif
}
if (onlyKeyShare == 0 || onlyKeyShare == 2) {
if (useX25519) {
if (wolfSSL_UseKeyShare(ssl, WOLFSSL_ECC_X25519)
!= SSL_SUCCESS) {
err_sys("unable to use curve secp256r1");
}
}
if (wolfSSL_UseKeyShare(ssl, WOLFSSL_ECC_SECP256R1)
!= SSL_SUCCESS) {
err_sys("unable to use curve secp256r1");
@ -1512,6 +1528,13 @@ THREAD_RETURN WOLFSSL_THREAD client_test(void* args)
err_sys("unable to use curve secp384r1");
}
}
if (onlyKeyShare == 0 || onlyKeyShare == 1) {
#ifdef HAVE_FFDHE_2048
if (wolfSSL_UseKeyShare(ssl, WOLFSSL_FFDHE_2048) != SSL_SUCCESS) {
err_sys("unable to use DH 2048-bit parameters");
}
#endif
}
}
else {
wolfSSL_NoKeyShares(ssl);
@ -1920,12 +1943,17 @@ THREAD_RETURN WOLFSSL_THREAD client_test(void* args)
(void*)"resumed session");
#endif
#ifdef HAVE_CURVE25519
if (useX25519)
wolfSSL_UseSupportedCurve(sslResume, WOLFSSL_ECC_X25519);
#endif
#ifdef WOLFSSL_TLS13
#ifdef HAVE_FFDHE_2048
if (wolfSSL_UseKeyShare(sslResume, WOLFSSL_FFDHE_2048) != SSL_SUCCESS) {
err_sys("unable to use DH 2048-bit parameters");
if (useX25519) {
if (wolfSSL_UseKeyShare(ssl, WOLFSSL_ECC_X25519) != SSL_SUCCESS) {
err_sys("unable to use curve secp256r1");
}
}
#endif
if (wolfSSL_UseKeyShare(sslResume,
WOLFSSL_ECC_SECP256R1) != SSL_SUCCESS) {
err_sys("unable to use curve secp256r1");
@ -1934,6 +1962,11 @@ THREAD_RETURN WOLFSSL_THREAD client_test(void* args)
WOLFSSL_ECC_SECP384R1) != SSL_SUCCESS) {
err_sys("unable to use curve secp384r1");
}
#ifdef HAVE_FFDHE_2048
if (wolfSSL_UseKeyShare(sslResume, WOLFSSL_FFDHE_2048) != SSL_SUCCESS) {
err_sys("unable to use DH 2048-bit parameters");
}
#endif
#endif
#ifndef WOLFSSL_CALLBACKS

3
src/ssl.c
View File

@ -1598,6 +1598,7 @@ int wolfSSL_UseSupportedCurve(WOLFSSL* ssl, word16 name)
case WOLFSSL_ECC_BRAINPOOLP256R1:
case WOLFSSL_ECC_BRAINPOOLP384R1:
case WOLFSSL_ECC_BRAINPOOLP512R1:
case WOLFSSL_ECC_X25519:
break;
#ifdef WOLFSSL_TLS13
@ -14229,7 +14230,7 @@ const char* wolfSSL_get_curve_name(WOLFSSL* ssl)
{
if (ssl == NULL)
return NULL;
if (ssl->specs.kea != ecdhe_psk_kea &&
if (!IsAtLeastTLSv1_3(ssl->version) && ssl->specs.kea != ecdhe_psk_kea &&
ssl->specs.kea != ecc_diffie_hellman_kea)
return NULL;
if (ssl->ecdhCurveOID == 0)

35
src/tls.c
View File

@ -3061,6 +3061,12 @@ int TLSX_ValidateEllipticCurves(WOLFSSL* ssl, byte first, byte second) {
octets = 32;
break;
#endif /* !NO_ECC_SECP */
#ifdef HAVE_CURVE25519
case WOLFSSL_ECC_X25519:
oid = ECC_X25519_OID;
octets = 32;
break;
#endif /* HAVE_CURVE25519 */
#ifdef HAVE_ECC_KOBLITZ
case WOLFSSL_ECC_SECP256K1:
oid = ECC_SECP256K1_OID;
@ -3073,12 +3079,6 @@ int TLSX_ValidateEllipticCurves(WOLFSSL* ssl, byte first, byte second) {
octets = 32;
break;
#endif /* HAVE_ECC_BRAINPOOL */
#ifdef HAVE_CURVE25519
case WOLFSSL_ECC_X25519:
oid = ECC_X25519_OID;
octets = 32;
break;
#endif /* HAVE_ECC_BRAINPOOL */
#endif
#if defined(HAVE_ECC384) || defined(HAVE_ALL_CURVES)
#ifndef NO_ECC_SECP
@ -5083,6 +5083,7 @@ static int TLSX_KeyShare_ProcessDh(WOLFSSL* ssl, KeyShareEntry* keyShareEntry)
if (params->p_len != keyShareEntry->keLen)
return BUFFER_ERROR;
ssl->options.dhKeySz = params->p_len;
/* TODO: [TLS13] move this check down into wolfcrypt. */
/* Check that public DH key is not 0 or 1. */
@ -5221,6 +5222,7 @@ static int TLSX_KeyShare_ProcessEcc(WOLFSSL* ssl, KeyShareEntry* keyShareEntry)
EC25519_LITTLE_ENDIAN);
wc_curve25519_free(peerEccKey);
XFREE(peerEccKey, ssl->heap, DYNAMIC_TYPE_TLSX);
ssl->ecdhCurveOID = ECC_X25519_OID;
return ret;
}
#endif
@ -5244,6 +5246,7 @@ static int TLSX_KeyShare_ProcessEcc(WOLFSSL* ssl, KeyShareEntry* keyShareEntry)
ssl->peerEccKey, curveId) != 0) {
return ECC_PEERKEY_ERROR;
}
ssl->ecdhCurveOID = ssl->peerEccKey->dp->oidSum;
ssl->arrays->preMasterSz = ENCRYPT_LEN;
do {
@ -5607,6 +5610,10 @@ static int TLSX_KeyShare_IsSupported(int namedGroup)
break;
#endif /* !NO_ECC_SECP */
#endif
#ifdef HAVE_CURVE25519
case WOLFSSL_ECC_X25519:
break;
#endif
#if defined(HAVE_ECC384) || defined(HAVE_ALL_CURVES)
#ifndef NO_ECC_SECP
case WOLFSSL_ECC_SECP384R1:
@ -5619,10 +5626,6 @@ static int TLSX_KeyShare_IsSupported(int namedGroup)
break;
#endif /* !NO_ECC_SECP */
#endif
#ifdef HAVE_CURVE25519
case WOLFSSL_ECC_X25519:
break;
#endif
#ifdef HAVE_X448
case WOLFSSL_ECC_X448:
break;
@ -7033,16 +7036,16 @@ int TLSX_PopulateExtensions(WOLFSSL* ssl, byte isServer)
#endif
#endif
#if !defined(NO_ECC256) || defined(HAVE_ALL_CURVES)
#ifdef HAVE_CURVE25519
ret = TLSX_UseSupportedCurve(&ssl->extensions,
WOLFSSL_ECC_X25519, ssl->heap);
if (ret != SSL_SUCCESS) return ret;
#endif
#ifndef NO_ECC_SECP
ret = TLSX_UseSupportedCurve(&ssl->extensions,
WOLFSSL_ECC_SECP256R1, ssl->heap);
if (ret != SSL_SUCCESS) return ret;
#endif
#ifdef HAVE_CURVE25519
ret = TLSX_UseSupportedCurve(&ssl->extensions,
WOLFSSL_ECC_X25519, ssl->heap);
if (ret != SSL_SUCCESS) return ret;
#endif
#ifdef HAVE_ECC_KOBLITZ
ret = TLSX_UseSupportedCurve(&ssl->extensions,
WOLFSSL_ECC_SECP256K1, ssl->heap);
@ -7135,6 +7138,8 @@ int TLSX_PopulateExtensions(WOLFSSL* ssl, byte isServer)
!defined(NO_ECC_SECP)
ret = TLSX_KeyShare_Use(ssl, WOLFSSL_ECC_SECP256R1, 0, NULL,
NULL);
#elif defined(HAVE_CURVE25519)
ret = TLSX_KeyShare_Use(ssl, WOLFSSL_ECC_X25519, 0, NULL, NULL);
#elif (!defined(NO_ECC384) || defined(HAVE_ALL_CURVES)) && \
!defined(NO_ECC_SECP)
ret = TLSX_KeyShare_Use(ssl, WOLFSSL_ECC_SECP384R1, 0, NULL,