/* Called from ssl3_SendClientKeyExchange(). */
SECStatus
ssl3_SendECDHClientKeyExchange(sslSocket * ss, SECKEYPublicKey * svrPubKey)
{
PK11SymKey * pms = NULL;
SECStatus rv = SECFailure;
PRBool isTLS, isTLS12;
CK_MECHANISM_TYPE target;
SECKEYPublicKey *pubKey = NULL; /* Ephemeral ECDH key */
SECKEYPrivateKey *privKey = NULL; /* Ephemeral ECDH key */
PORT_Assert( ss->opt.noLocks || ssl_HaveSSL3HandshakeLock(ss) );
PORT_Assert( ss->opt.noLocks || ssl_HaveXmitBufLock(ss));
isTLS = (PRBool)(ss->ssl3.pwSpec->version > SSL_LIBRARY_VERSION_3_0);
isTLS12 = (PRBool)(ss->ssl3.pwSpec->version >= SSL_LIBRARY_VERSION_TLS_1_2);
/* Generate ephemeral EC keypair */
if (svrPubKey->keyType != ecKey) {
PORT_SetError(SEC_ERROR_BAD_KEY);
goto loser;
}
/* XXX SHOULD CALL ssl3_CreateECDHEphemeralKeys here, instead! */
privKey = SECKEY_CreateECPrivateKey(&svrPubKey->u.ec.DEREncodedParams,
&pubKey, ss->pkcs11PinArg);
if (!privKey || !pubKey) {
ssl_MapLowLevelError(SEC_ERROR_KEYGEN_FAIL);
rv = SECFailure;
goto loser;
}
PRINT_BUF(50, (ss, "ECDH public value:",
pubKey->u.ec.publicValue.data,
pubKey->u.ec.publicValue.len));
if (isTLS12) {
target = CKM_NSS_TLS_MASTER_KEY_DERIVE_DH_SHA256;
} else if (isTLS) {
target = CKM_TLS_MASTER_KEY_DERIVE_DH;
} else {
target = CKM_SSL3_MASTER_KEY_DERIVE_DH;
}
/* Determine the PMS */
pms = PK11_PubDeriveWithKDF(privKey, svrPubKey, PR_FALSE, NULL, NULL,
CKM_ECDH1_DERIVE, target, CKA_DERIVE, 0,
CKD_NULL, NULL, NULL);
if (pms == NULL) {
SSL3AlertDescription desc = illegal_parameter;
(void)SSL3_SendAlert(ss, alert_fatal, desc);
ssl_MapLowLevelError(SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE);
goto loser;
}
SECKEY_DestroyPrivateKey(privKey);
privKey = NULL;
rv = ssl3_InitPendingCipherSpec(ss, pms);
PK11_FreeSymKey(pms); pms = NULL;
if (rv != SECSuccess) {
ssl_MapLowLevelError(SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE);
goto loser;
}
rv = ssl3_AppendHandshakeHeader(ss, client_key_exchange,
pubKey->u.ec.publicValue.len + 1);
if (rv != SECSuccess) {
goto loser; /* err set by ssl3_AppendHandshake* */
}
rv = ssl3_AppendHandshakeVariable(ss,
pubKey->u.ec.publicValue.data,
pubKey->u.ec.publicValue.len, 1);
SECKEY_DestroyPublicKey(pubKey);
pubKey = NULL;
if (rv != SECSuccess) {
goto loser; /* err set by ssl3_AppendHandshake* */
}
rv = SECSuccess;
loser:
if(pms) PK11_FreeSymKey(pms);
if(privKey) SECKEY_DestroyPrivateKey(privKey);
if(pubKey) SECKEY_DestroyPublicKey(pubKey);
return rv;
}
/*
** Called from ssl3_HandleClientKeyExchange()
*/
SECStatus
ssl3_HandleECDHClientKeyExchange(sslSocket *ss, SSL3Opaque *b,
PRUint32 length,
sslKeyPair *serverKeyPair)
{
PK11SymKey *pms;
SECStatus rv;
SECKEYPublicKey clntPubKey;
CK_MECHANISM_TYPE target;
PRBool isTLS, isTLS12;
int errCode = SSL_ERROR_RX_MALFORMED_CLIENT_KEY_EXCH;
PORT_Assert(ss->opt.noLocks || ssl_HaveRecvBufLock(ss));
PORT_Assert(ss->opt.noLocks || ssl_HaveSSL3HandshakeLock(ss));
clntPubKey.keyType = ecKey;
clntPubKey.u.ec.DEREncodedParams.len =
serverKeyPair->pubKey->u.ec.DEREncodedParams.len;
clntPubKey.u.ec.DEREncodedParams.data =
serverKeyPair->pubKey->u.ec.DEREncodedParams.data;
rv = ssl3_ConsumeHandshakeVariable(ss, &clntPubKey.u.ec.publicValue,
1, &b, &length);
if (rv != SECSuccess) {
PORT_SetError(errCode);
return SECFailure;
}
/* we have to catch the case when the client's public key has length 0. */
if (!clntPubKey.u.ec.publicValue.len) {
(void)SSL3_SendAlert(ss, alert_fatal, illegal_parameter);
PORT_SetError(errCode);
return SECFailure;
}
isTLS = (PRBool)(ss->ssl3.prSpec->version > SSL_LIBRARY_VERSION_3_0);
isTLS12 = (PRBool)(ss->ssl3.prSpec->version >= SSL_LIBRARY_VERSION_TLS_1_2);
if (isTLS12) {
target = CKM_TLS12_MASTER_KEY_DERIVE_DH;
} else if (isTLS) {
target = CKM_TLS_MASTER_KEY_DERIVE_DH;
} else {
target = CKM_SSL3_MASTER_KEY_DERIVE_DH;
}
/* Determine the PMS */
pms = PK11_PubDeriveWithKDF(serverKeyPair->privKey, &clntPubKey,
PR_FALSE, NULL, NULL,
CKM_ECDH1_DERIVE, target, CKA_DERIVE, 0,
CKD_NULL, NULL, NULL);
if (pms == NULL) {
/* last gasp. */
errCode = ssl_MapLowLevelError(SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE);
PORT_SetError(errCode);
return SECFailure;
}
rv = ssl3_InitPendingCipherSpec(ss, pms);
PK11_FreeSymKey(pms);
if (rv != SECSuccess) {
/* error code set by ssl3_InitPendingCipherSpec */
return SECFailure;
}
return SECSuccess;
}
SECStatus
SSL_CanBypass(CERTCertificate *cert, SECKEYPrivateKey *srvPrivkey,
PRUint32 protocolmask, PRUint16 *ciphersuites, int nsuites,
PRBool *pcanbypass, void *pwArg)
{ SECStatus rv;
int i;
PRUint16 suite;
PK11SymKey * pms = NULL;
SECKEYPublicKey * srvPubkey = NULL;
KeyType privKeytype;
PK11SlotInfo * slot = NULL;
SECItem param;
CK_VERSION version;
CK_MECHANISM_TYPE mechanism_array[2];
SECItem enc_pms = {siBuffer, NULL, 0};
PRBool isTLS = PR_FALSE;
SSLCipherSuiteInfo csdef;
PRBool testrsa = PR_FALSE;
PRBool testrsa_export = PR_FALSE;
PRBool testecdh = PR_FALSE;
PRBool testecdhe = PR_FALSE;
#ifdef NSS_ENABLE_ECC
SECKEYECParams ecParams = { siBuffer, NULL, 0 };
#endif
if (!cert || !srvPrivkey || !ciphersuites || !pcanbypass) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
srvPubkey = CERT_ExtractPublicKey(cert);
if (!srvPubkey)
return SECFailure;
*pcanbypass = PR_TRUE;
rv = SECFailure;
/* determine which KEAs to test */
/* 0 (SSL_NULL_WITH_NULL_NULL) is used as a list terminator because
* SSL3 and TLS specs forbid negotiating that cipher suite number.
*/
for (i=0; i < nsuites && (suite = *ciphersuites++) != 0; i++) {
/* skip SSL2 cipher suites and ones NSS doesn't support */
if (SSL_GetCipherSuiteInfo(suite, &csdef, sizeof(csdef)) != SECSuccess
|| SSL_IS_SSL2_CIPHER(suite) )
continue;
switch (csdef.keaType) {
case ssl_kea_rsa:
switch (csdef.cipherSuite) {
case TLS_RSA_EXPORT1024_WITH_RC4_56_SHA:
case TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA:
case SSL_RSA_EXPORT_WITH_RC4_40_MD5:
case SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5:
testrsa_export = PR_TRUE;
}
if (!testrsa_export)
testrsa = PR_TRUE;
break;
case ssl_kea_ecdh:
if (strcmp(csdef.keaTypeName, "ECDHE") == 0) /* ephemeral? */
testecdhe = PR_TRUE;
else
testecdh = PR_TRUE;
break;
case ssl_kea_dh:
/* this is actually DHE */
default:
continue;
}
}
/* For each protocol try to derive and extract an MS.
* Failure of function any function except MS extract means
* continue with the next cipher test. Stop testing when the list is
* exhausted or when the first MS extract--not derive--fails.
*/
privKeytype = SECKEY_GetPrivateKeyType(srvPrivkey);
protocolmask &= SSL_CBP_SSL3|SSL_CBP_TLS1_0;
while (protocolmask) {
if (protocolmask & SSL_CBP_SSL3) {
isTLS = PR_FALSE;
protocolmask ^= SSL_CBP_SSL3;
} else {
isTLS = PR_TRUE;
protocolmask ^= SSL_CBP_TLS1_0;
}
if (privKeytype == rsaKey && testrsa_export) {
if (PK11_GetPrivateModulusLen(srvPrivkey) > EXPORT_RSA_KEY_LENGTH) {
*pcanbypass = PR_FALSE;
rv = SECSuccess;
break;
} else
testrsa = PR_TRUE;
}
for (; privKeytype == rsaKey && testrsa; ) {
/* TLS_RSA */
unsigned char rsaPmsBuf[SSL3_RSA_PMS_LENGTH];
unsigned int outLen = 0;
CK_MECHANISM_TYPE target;
SECStatus irv;
mechanism_array[0] = CKM_SSL3_PRE_MASTER_KEY_GEN;
mechanism_array[1] = CKM_RSA_PKCS;
slot = PK11_GetBestSlotMultiple(mechanism_array, 2, pwArg);
if (slot == NULL) {
PORT_SetError(SSL_ERROR_TOKEN_SLOT_NOT_FOUND);
break;
}
/* Generate the pre-master secret ... (client side) */
version.major = 3 /*MSB(clientHelloVersion)*/;
version.minor = 0 /*LSB(clientHelloVersion)*/;
param.data = (unsigned char *)&version;
param.len = sizeof version;
pms = PK11_KeyGen(slot, CKM_SSL3_PRE_MASTER_KEY_GEN, ¶m, 0, pwArg);
PK11_FreeSlot(slot);
if (!pms)
break;
/* now wrap it */
enc_pms.len = SECKEY_PublicKeyStrength(srvPubkey);
enc_pms.data = (unsigned char*)PORT_Alloc(enc_pms.len);
if (enc_pms.data == NULL) {
PORT_SetError(PR_OUT_OF_MEMORY_ERROR);
break;
}
irv = PK11_PubWrapSymKey(CKM_RSA_PKCS, srvPubkey, pms, &enc_pms);
if (irv != SECSuccess)
break;
PK11_FreeSymKey(pms);
pms = NULL;
/* now do the server side--check the triple bypass first */
rv = PK11_PrivDecryptPKCS1(srvPrivkey, rsaPmsBuf, &outLen,
sizeof rsaPmsBuf,
(unsigned char *)enc_pms.data,
enc_pms.len);
/* if decrypt worked we're done with the RSA test */
if (rv == SECSuccess) {
*pcanbypass = PR_TRUE;
break;
}
/* check for fallback to double bypass */
target = isTLS ? CKM_TLS_MASTER_KEY_DERIVE
: CKM_SSL3_MASTER_KEY_DERIVE;
pms = PK11_PubUnwrapSymKey(srvPrivkey, &enc_pms,
target, CKA_DERIVE, 0);
rv = ssl_canExtractMS(pms, isTLS, PR_FALSE, pcanbypass);
if (rv == SECSuccess && *pcanbypass == PR_FALSE)
goto done;
break;
}
/* Check for NULL to avoid double free.
* SECItem_FreeItem sets data NULL in secitem.c#265
*/
if (enc_pms.data != NULL) {
SECITEM_FreeItem(&enc_pms, PR_FALSE);
}
#ifdef NSS_ENABLE_ECC
for (; (privKeytype == ecKey && ( testecdh || testecdhe)) ||
(privKeytype == rsaKey && testecdhe); ) {
CK_MECHANISM_TYPE target;
SECKEYPublicKey *keapub = NULL;
SECKEYPrivateKey *keapriv;
SECKEYPublicKey *cpub = NULL; /* client's ephemeral ECDH keys */
SECKEYPrivateKey *cpriv = NULL;
SECKEYECParams *pecParams = NULL;
if (privKeytype == ecKey && testecdhe) {
/* TLS_ECDHE_ECDSA */
pecParams = &srvPubkey->u.ec.DEREncodedParams;
} else if (privKeytype == rsaKey && testecdhe) {
/* TLS_ECDHE_RSA */
ECName ec_curve;
int serverKeyStrengthInBits;
int signatureKeyStrength;
int requiredECCbits;
/* find a curve of equivalent strength to the RSA key's */
requiredECCbits = PK11_GetPrivateModulusLen(srvPrivkey);
if (requiredECCbits < 0)
break;
requiredECCbits *= BPB;
serverKeyStrengthInBits = srvPubkey->u.rsa.modulus.len;
if (srvPubkey->u.rsa.modulus.data[0] == 0) {
serverKeyStrengthInBits--;
}
/* convert to strength in bits */
serverKeyStrengthInBits *= BPB;
signatureKeyStrength =
SSL_RSASTRENGTH_TO_ECSTRENGTH(serverKeyStrengthInBits);
if ( requiredECCbits > signatureKeyStrength )
requiredECCbits = signatureKeyStrength;
ec_curve =
ssl3_GetCurveWithECKeyStrength(SSL3_SUPPORTED_CURVES_MASK,
requiredECCbits);
rv = ssl3_ECName2Params(NULL, ec_curve, &ecParams);
if (rv == SECFailure) {
break;
}
pecParams = &ecParams;
}
if (testecdhe) {
/* generate server's ephemeral keys */
keapriv = SECKEY_CreateECPrivateKey(pecParams, &keapub, NULL);
if (!keapriv || !keapub) {
if (keapriv)
SECKEY_DestroyPrivateKey(keapriv);
if (keapub)
SECKEY_DestroyPublicKey(keapub);
PORT_SetError(SEC_ERROR_KEYGEN_FAIL);
rv = SECFailure;
break;
}
} else {
/* TLS_ECDH_ECDSA */
keapub = srvPubkey;
keapriv = srvPrivkey;
pecParams = &srvPubkey->u.ec.DEREncodedParams;
}
/* perform client side ops */
/* generate a pair of ephemeral keys using server's parms */
cpriv = SECKEY_CreateECPrivateKey(pecParams, &cpub, NULL);
if (!cpriv || !cpub) {
if (testecdhe) {
SECKEY_DestroyPrivateKey(keapriv);
SECKEY_DestroyPublicKey(keapub);
}
PORT_SetError(SEC_ERROR_KEYGEN_FAIL);
rv = SECFailure;
break;
}
/* now do the server side */
/* determine the PMS using client's public value */
target = isTLS ? CKM_TLS_MASTER_KEY_DERIVE_DH
: CKM_SSL3_MASTER_KEY_DERIVE_DH;
pms = PK11_PubDeriveWithKDF(keapriv, cpub, PR_FALSE, NULL, NULL,
CKM_ECDH1_DERIVE,
target,
CKA_DERIVE, 0, CKD_NULL, NULL, NULL);
rv = ssl_canExtractMS(pms, isTLS, PR_TRUE, pcanbypass);
SECKEY_DestroyPrivateKey(cpriv);
SECKEY_DestroyPublicKey(cpub);
if (testecdhe) {
SECKEY_DestroyPrivateKey(keapriv);
SECKEY_DestroyPublicKey(keapub);
}
if (rv == SECSuccess && *pcanbypass == PR_FALSE)
goto done;
break;
}
/* Check for NULL to avoid double free. */
if (ecParams.data != NULL) {
PORT_Free(ecParams.data);
ecParams.data = NULL;
}
#endif /* NSS_ENABLE_ECC */
if (pms)
PK11_FreeSymKey(pms);
}
/* *pcanbypass has been set */
rv = SECSuccess;
done:
if (pms)
PK11_FreeSymKey(pms);
/* Check for NULL to avoid double free.
* SECItem_FreeItem sets data NULL in secitem.c#265
*/
if (enc_pms.data != NULL) {
SECITEM_FreeItem(&enc_pms, PR_FALSE);
}
#ifdef NSS_ENABLE_ECC
if (ecParams.data != NULL) {
PORT_Free(ecParams.data);
ecParams.data = NULL;
}
#endif /* NSS_ENABLE_ECC */
if (srvPubkey) {
SECKEY_DestroyPublicKey(srvPubkey);
srvPubkey = NULL;
}
return rv;
}
/* Called from ssl3_SendClientKeyExchange(). */
SECStatus
ssl3_SendECDHClientKeyExchange(sslSocket *ss, SECKEYPublicKey *svrPubKey)
{
PK11SymKey *pms = NULL;
SECStatus rv = SECFailure;
PRBool isTLS, isTLS12;
CK_MECHANISM_TYPE target;
const namedGroupDef *groupDef;
sslEphemeralKeyPair *keyPair = NULL;
SECKEYPublicKey *pubKey;
PORT_Assert(ss->opt.noLocks || ssl_HaveSSL3HandshakeLock(ss));
PORT_Assert(ss->opt.noLocks || ssl_HaveXmitBufLock(ss));
isTLS = (PRBool)(ss->ssl3.pwSpec->version > SSL_LIBRARY_VERSION_3_0);
isTLS12 = (PRBool)(ss->ssl3.pwSpec->version >= SSL_LIBRARY_VERSION_TLS_1_2);
/* Generate ephemeral EC keypair */
if (svrPubKey->keyType != ecKey) {
PORT_SetError(SEC_ERROR_BAD_KEY);
goto loser;
}
groupDef = ssl_ECPubKey2NamedGroup(svrPubKey);
if (!groupDef) {
PORT_SetError(SEC_ERROR_BAD_KEY);
goto loser;
}
rv = ssl_CreateECDHEphemeralKeyPair(groupDef, &keyPair);
if (rv != SECSuccess) {
ssl_MapLowLevelError(SEC_ERROR_KEYGEN_FAIL);
goto loser;
}
pubKey = keyPair->keys->pubKey;
PRINT_BUF(50, (ss, "ECDH public value:",
pubKey->u.ec.publicValue.data,
pubKey->u.ec.publicValue.len));
if (isTLS12) {
target = CKM_TLS12_MASTER_KEY_DERIVE_DH;
} else if (isTLS) {
target = CKM_TLS_MASTER_KEY_DERIVE_DH;
} else {
target = CKM_SSL3_MASTER_KEY_DERIVE_DH;
}
/* Determine the PMS */
pms = PK11_PubDeriveWithKDF(keyPair->keys->privKey, svrPubKey,
PR_FALSE, NULL, NULL, CKM_ECDH1_DERIVE, target,
CKA_DERIVE, 0, CKD_NULL, NULL, NULL);
if (pms == NULL) {
(void)SSL3_SendAlert(ss, alert_fatal, illegal_parameter);
ssl_MapLowLevelError(SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE);
goto loser;
}
rv = ssl3_AppendHandshakeHeader(ss, client_key_exchange,
pubKey->u.ec.publicValue.len + 1);
if (rv != SECSuccess) {
goto loser; /* err set by ssl3_AppendHandshake* */
}
rv = ssl3_AppendHandshakeVariable(ss, pubKey->u.ec.publicValue.data,
pubKey->u.ec.publicValue.len, 1);
if (rv != SECSuccess) {
goto loser; /* err set by ssl3_AppendHandshake* */
}
rv = ssl3_InitPendingCipherSpec(ss, pms);
if (rv != SECSuccess) {
ssl_MapLowLevelError(SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE);
goto loser;
}
PK11_FreeSymKey(pms);
ssl_FreeEphemeralKeyPair(keyPair);
return SECSuccess;
loser:
if (pms)
PK11_FreeSymKey(pms);
if (keyPair)
ssl_FreeEphemeralKeyPair(keyPair);
return SECFailure;
}
SECStatus
SSL_CanBypass(CERTCertificate *cert, SECKEYPrivateKey *srvPrivkey,
PRUint32 protocolmask, PRUint16 *ciphersuites, int nsuites,
PRBool *pcanbypass, void *pwArg)
{
#ifdef NO_PKCS11_BYPASS
if (!pcanbypass) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
*pcanbypass = PR_FALSE;
return SECSuccess;
#else
SECStatus rv;
int i;
PRUint16 suite;
PK11SymKey * pms = NULL;
SECKEYPublicKey * srvPubkey = NULL;
KeyType privKeytype;
PK11SlotInfo * slot = NULL;
SECItem param;
CK_VERSION version;
CK_MECHANISM_TYPE mechanism_array[2];
SECItem enc_pms = {siBuffer, NULL, 0};
PRBool isTLS = PR_FALSE;
SSLCipherSuiteInfo csdef;
PRBool testrsa = PR_FALSE;
PRBool testrsa_export = PR_FALSE;
PRBool testecdh = PR_FALSE;
PRBool testecdhe = PR_FALSE;
#ifdef NSS_ENABLE_ECC
SECKEYECParams ecParams = { siBuffer, NULL, 0 };
#endif
if (!cert || !srvPrivkey || !ciphersuites || !pcanbypass) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
srvPubkey = CERT_ExtractPublicKey(cert);
if (!srvPubkey)
return SECFailure;
*pcanbypass = PR_TRUE;
rv = SECFailure;
for (i=0; i < nsuites && (suite = *ciphersuites++) != 0; i++) {
if (SSL_GetCipherSuiteInfo(suite, &csdef, sizeof(csdef)) != SECSuccess
|| SSL_IS_SSL2_CIPHER(suite) )
continue;
switch (csdef.keaType) {
case ssl_kea_rsa:
switch (csdef.cipherSuite) {
case TLS_RSA_EXPORT1024_WITH_RC4_56_SHA:
case TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA:
case SSL_RSA_EXPORT_WITH_RC4_40_MD5:
case SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5:
testrsa_export = PR_TRUE;
}
if (!testrsa_export)
testrsa = PR_TRUE;
break;
case ssl_kea_ecdh:
if (strcmp(csdef.keaTypeName, "ECDHE") == 0)
testecdhe = PR_TRUE;
else
testecdh = PR_TRUE;
break;
case ssl_kea_dh:
default:
continue;
}
}
privKeytype = SECKEY_GetPrivateKeyType(srvPrivkey);
protocolmask &= SSL_CBP_SSL3|SSL_CBP_TLS1_0;
while (protocolmask) {
if (protocolmask & SSL_CBP_SSL3) {
isTLS = PR_FALSE;
protocolmask ^= SSL_CBP_SSL3;
} else {
isTLS = PR_TRUE;
protocolmask ^= SSL_CBP_TLS1_0;
}
if (privKeytype == rsaKey && testrsa_export) {
if (PK11_GetPrivateModulusLen(srvPrivkey) > EXPORT_RSA_KEY_LENGTH) {
*pcanbypass = PR_FALSE;
rv = SECSuccess;
break;
} else
testrsa = PR_TRUE;
}
for (; privKeytype == rsaKey && testrsa; ) {
unsigned char rsaPmsBuf[SSL3_RSA_PMS_LENGTH];
unsigned int outLen = 0;
CK_MECHANISM_TYPE target;
SECStatus irv;
mechanism_array[0] = CKM_SSL3_PRE_MASTER_KEY_GEN;
mechanism_array[1] = CKM_RSA_PKCS;
slot = PK11_GetBestSlotMultiple(mechanism_array, 2, pwArg);
if (slot == NULL) {
PORT_SetError(SSL_ERROR_TOKEN_SLOT_NOT_FOUND);
break;
}
version.major = 3 ;
version.minor = 0 ;
param.data = (unsigned char *)&version;
param.len = sizeof version;
pms = PK11_KeyGen(slot, CKM_SSL3_PRE_MASTER_KEY_GEN, ¶m, 0, pwArg);
PK11_FreeSlot(slot);
if (!pms)
break;
enc_pms.len = SECKEY_PublicKeyStrength(srvPubkey);
enc_pms.data = (unsigned char*)PORT_Alloc(enc_pms.len);
if (enc_pms.data == NULL) {
PORT_SetError(PR_OUT_OF_MEMORY_ERROR);
break;
}
irv = PK11_PubWrapSymKey(CKM_RSA_PKCS, srvPubkey, pms, &enc_pms);
if (irv != SECSuccess)
break;
PK11_FreeSymKey(pms);
pms = NULL;
rv = PK11_PrivDecryptPKCS1(srvPrivkey, rsaPmsBuf, &outLen,
sizeof rsaPmsBuf,
(unsigned char *)enc_pms.data,
enc_pms.len);
if (rv == SECSuccess) {
*pcanbypass = PR_TRUE;
break;
}
target = isTLS ? CKM_TLS_MASTER_KEY_DERIVE
: CKM_SSL3_MASTER_KEY_DERIVE;
pms = PK11_PubUnwrapSymKey(srvPrivkey, &enc_pms,
target, CKA_DERIVE, 0);
rv = ssl_canExtractMS(pms, isTLS, PR_FALSE, pcanbypass);
if (rv == SECSuccess && *pcanbypass == PR_FALSE)
goto done;
break;
}
if (enc_pms.data != NULL) {
SECITEM_FreeItem(&enc_pms, PR_FALSE);
}
#ifdef NSS_ENABLE_ECC
for (; (privKeytype == ecKey && ( testecdh || testecdhe)) ||
(privKeytype == rsaKey && testecdhe); ) {
CK_MECHANISM_TYPE target;
SECKEYPublicKey *keapub = NULL;
SECKEYPrivateKey *keapriv;
SECKEYPublicKey *cpub = NULL;
SECKEYPrivateKey *cpriv = NULL;
SECKEYECParams *pecParams = NULL;
if (privKeytype == ecKey && testecdhe) {
pecParams = &srvPubkey->u.ec.DEREncodedParams;
} else if (privKeytype == rsaKey && testecdhe) {
ECName ec_curve;
int serverKeyStrengthInBits;
int signatureKeyStrength;
int requiredECCbits;
requiredECCbits = PK11_GetPrivateModulusLen(srvPrivkey);
if (requiredECCbits < 0)
break;
requiredECCbits *= BPB;
serverKeyStrengthInBits = srvPubkey->u.rsa.modulus.len;
if (srvPubkey->u.rsa.modulus.data[0] == 0) {
serverKeyStrengthInBits--;
}
serverKeyStrengthInBits *= BPB;
signatureKeyStrength =
SSL_RSASTRENGTH_TO_ECSTRENGTH(serverKeyStrengthInBits);
if ( requiredECCbits > signatureKeyStrength )
requiredECCbits = signatureKeyStrength;
ec_curve =
ssl3_GetCurveWithECKeyStrength(
ssl3_GetSupportedECCurveMask(NULL),
requiredECCbits);
rv = ssl3_ECName2Params(NULL, ec_curve, &ecParams);
if (rv == SECFailure) {
break;
}
pecParams = &ecParams;
}
if (testecdhe) {
keapriv = SECKEY_CreateECPrivateKey(pecParams, &keapub, NULL);
if (!keapriv || !keapub) {
if (keapriv)
SECKEY_DestroyPrivateKey(keapriv);
if (keapub)
SECKEY_DestroyPublicKey(keapub);
PORT_SetError(SEC_ERROR_KEYGEN_FAIL);
rv = SECFailure;
break;
}
} else {
keapub = srvPubkey;
keapriv = srvPrivkey;
pecParams = &srvPubkey->u.ec.DEREncodedParams;
}
cpriv = SECKEY_CreateECPrivateKey(pecParams, &cpub, NULL);
if (!cpriv || !cpub) {
if (testecdhe) {
SECKEY_DestroyPrivateKey(keapriv);
SECKEY_DestroyPublicKey(keapub);
}
PORT_SetError(SEC_ERROR_KEYGEN_FAIL);
rv = SECFailure;
break;
}
target = isTLS ? CKM_TLS_MASTER_KEY_DERIVE_DH
: CKM_SSL3_MASTER_KEY_DERIVE_DH;
pms = PK11_PubDeriveWithKDF(keapriv, cpub, PR_FALSE, NULL, NULL,
CKM_ECDH1_DERIVE,
target,
CKA_DERIVE, 0, CKD_NULL, NULL, NULL);
rv = ssl_canExtractMS(pms, isTLS, PR_TRUE, pcanbypass);
SECKEY_DestroyPrivateKey(cpriv);
SECKEY_DestroyPublicKey(cpub);
if (testecdhe) {
SECKEY_DestroyPrivateKey(keapriv);
SECKEY_DestroyPublicKey(keapub);
}
if (rv == SECSuccess && *pcanbypass == PR_FALSE)
goto done;
break;
}
if (ecParams.data != NULL) {
PORT_Free(ecParams.data);
ecParams.data = NULL;
}
#endif
if (pms)
PK11_FreeSymKey(pms);
}
rv = SECSuccess;
done:
if (pms)
PK11_FreeSymKey(pms);
if (enc_pms.data != NULL) {
SECITEM_FreeItem(&enc_pms, PR_FALSE);
}
#ifdef NSS_ENABLE_ECC
if (ecParams.data != NULL) {
PORT_Free(ecParams.data);
ecParams.data = NULL;
}
#endif
if (srvPubkey) {
SECKEY_DestroyPublicKey(srvPubkey);
srvPubkey = NULL;
}
return rv;
#endif
}
