Index: net/third_party/nss/ssl/ssl3ecc.c |
diff --git a/net/third_party/nss/ssl/ssl3ecc.c b/net/third_party/nss/ssl/ssl3ecc.c |
deleted file mode 100644 |
index 39f9af12c56041c1cf1eb102c404453534a4b42b..0000000000000000000000000000000000000000 |
--- a/net/third_party/nss/ssl/ssl3ecc.c |
+++ /dev/null |
@@ -1,1275 +0,0 @@ |
-/* |
- * SSL3 Protocol |
- * |
- * This Source Code Form is subject to the terms of the Mozilla Public |
- * License, v. 2.0. If a copy of the MPL was not distributed with this |
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
- |
-/* ECC code moved here from ssl3con.c */ |
- |
-#include "nss.h" |
-#include "cert.h" |
-#include "ssl.h" |
-#include "cryptohi.h" /* for DSAU_ stuff */ |
-#include "keyhi.h" |
-#include "secder.h" |
-#include "secitem.h" |
- |
-#include "sslimpl.h" |
-#include "sslproto.h" |
-#include "sslerr.h" |
-#include "prtime.h" |
-#include "prinrval.h" |
-#include "prerror.h" |
-#include "pratom.h" |
-#include "prthread.h" |
-#include "prinit.h" |
- |
-#include "pk11func.h" |
-#include "secmod.h" |
- |
-#include <stdio.h> |
- |
-/* This is a bodge to allow this code to be compiled against older NSS headers |
- * that don't contain the TLS 1.2 changes. */ |
-#ifndef CKM_NSS_TLS_MASTER_KEY_DERIVE_DH_SHA256 |
-#define CKM_NSS_TLS_MASTER_KEY_DERIVE_DH_SHA256 (CKM_NSS + 24) |
-#endif |
- |
-#ifdef NSS_ENABLE_ECC |
- |
-#ifndef PK11_SETATTRS |
-#define PK11_SETATTRS(x,id,v,l) (x)->type = (id); \ |
- (x)->pValue=(v); (x)->ulValueLen = (l); |
-#endif |
- |
-#define SSL_GET_SERVER_PUBLIC_KEY(sock, type) \ |
- (ss->serverCerts[type].serverKeyPair ? \ |
- ss->serverCerts[type].serverKeyPair->pubKey : NULL) |
- |
-#define SSL_IS_CURVE_NEGOTIATED(curvemsk, curveName) \ |
- ((curveName > ec_noName) && \ |
- (curveName < ec_pastLastName) && \ |
- ((1UL << curveName) & curvemsk) != 0) |
- |
- |
- |
-static SECStatus ssl3_CreateECDHEphemeralKeys(sslSocket *ss, ECName ec_curve); |
- |
-#define supportedCurve(x) (((x) > ec_noName) && ((x) < ec_pastLastName)) |
- |
-/* Table containing OID tags for elliptic curves named in the |
- * ECC-TLS IETF draft. |
- */ |
-static const SECOidTag ecName2OIDTag[] = { |
- 0, |
- SEC_OID_SECG_EC_SECT163K1, /* 1 */ |
- SEC_OID_SECG_EC_SECT163R1, /* 2 */ |
- SEC_OID_SECG_EC_SECT163R2, /* 3 */ |
- SEC_OID_SECG_EC_SECT193R1, /* 4 */ |
- SEC_OID_SECG_EC_SECT193R2, /* 5 */ |
- SEC_OID_SECG_EC_SECT233K1, /* 6 */ |
- SEC_OID_SECG_EC_SECT233R1, /* 7 */ |
- SEC_OID_SECG_EC_SECT239K1, /* 8 */ |
- SEC_OID_SECG_EC_SECT283K1, /* 9 */ |
- SEC_OID_SECG_EC_SECT283R1, /* 10 */ |
- SEC_OID_SECG_EC_SECT409K1, /* 11 */ |
- SEC_OID_SECG_EC_SECT409R1, /* 12 */ |
- SEC_OID_SECG_EC_SECT571K1, /* 13 */ |
- SEC_OID_SECG_EC_SECT571R1, /* 14 */ |
- SEC_OID_SECG_EC_SECP160K1, /* 15 */ |
- SEC_OID_SECG_EC_SECP160R1, /* 16 */ |
- SEC_OID_SECG_EC_SECP160R2, /* 17 */ |
- SEC_OID_SECG_EC_SECP192K1, /* 18 */ |
- SEC_OID_SECG_EC_SECP192R1, /* 19 */ |
- SEC_OID_SECG_EC_SECP224K1, /* 20 */ |
- SEC_OID_SECG_EC_SECP224R1, /* 21 */ |
- SEC_OID_SECG_EC_SECP256K1, /* 22 */ |
- SEC_OID_SECG_EC_SECP256R1, /* 23 */ |
- SEC_OID_SECG_EC_SECP384R1, /* 24 */ |
- SEC_OID_SECG_EC_SECP521R1, /* 25 */ |
-}; |
- |
-static const PRUint16 curve2bits[] = { |
- 0, /* ec_noName = 0, */ |
- 163, /* ec_sect163k1 = 1, */ |
- 163, /* ec_sect163r1 = 2, */ |
- 163, /* ec_sect163r2 = 3, */ |
- 193, /* ec_sect193r1 = 4, */ |
- 193, /* ec_sect193r2 = 5, */ |
- 233, /* ec_sect233k1 = 6, */ |
- 233, /* ec_sect233r1 = 7, */ |
- 239, /* ec_sect239k1 = 8, */ |
- 283, /* ec_sect283k1 = 9, */ |
- 283, /* ec_sect283r1 = 10, */ |
- 409, /* ec_sect409k1 = 11, */ |
- 409, /* ec_sect409r1 = 12, */ |
- 571, /* ec_sect571k1 = 13, */ |
- 571, /* ec_sect571r1 = 14, */ |
- 160, /* ec_secp160k1 = 15, */ |
- 160, /* ec_secp160r1 = 16, */ |
- 160, /* ec_secp160r2 = 17, */ |
- 192, /* ec_secp192k1 = 18, */ |
- 192, /* ec_secp192r1 = 19, */ |
- 224, /* ec_secp224k1 = 20, */ |
- 224, /* ec_secp224r1 = 21, */ |
- 256, /* ec_secp256k1 = 22, */ |
- 256, /* ec_secp256r1 = 23, */ |
- 384, /* ec_secp384r1 = 24, */ |
- 521, /* ec_secp521r1 = 25, */ |
- 65535 /* ec_pastLastName */ |
-}; |
- |
-typedef struct Bits2CurveStr { |
- PRUint16 bits; |
- ECName curve; |
-} Bits2Curve; |
- |
-static const Bits2Curve bits2curve [] = { |
- { 192, ec_secp192r1 /* = 19, fast */ }, |
- { 160, ec_secp160r2 /* = 17, fast */ }, |
- { 160, ec_secp160k1 /* = 15, */ }, |
- { 160, ec_secp160r1 /* = 16, */ }, |
- { 163, ec_sect163k1 /* = 1, */ }, |
- { 163, ec_sect163r1 /* = 2, */ }, |
- { 163, ec_sect163r2 /* = 3, */ }, |
- { 192, ec_secp192k1 /* = 18, */ }, |
- { 193, ec_sect193r1 /* = 4, */ }, |
- { 193, ec_sect193r2 /* = 5, */ }, |
- { 224, ec_secp224r1 /* = 21, fast */ }, |
- { 224, ec_secp224k1 /* = 20, */ }, |
- { 233, ec_sect233k1 /* = 6, */ }, |
- { 233, ec_sect233r1 /* = 7, */ }, |
- { 239, ec_sect239k1 /* = 8, */ }, |
- { 256, ec_secp256r1 /* = 23, fast */ }, |
- { 256, ec_secp256k1 /* = 22, */ }, |
- { 283, ec_sect283k1 /* = 9, */ }, |
- { 283, ec_sect283r1 /* = 10, */ }, |
- { 384, ec_secp384r1 /* = 24, fast */ }, |
- { 409, ec_sect409k1 /* = 11, */ }, |
- { 409, ec_sect409r1 /* = 12, */ }, |
- { 521, ec_secp521r1 /* = 25, fast */ }, |
- { 571, ec_sect571k1 /* = 13, */ }, |
- { 571, ec_sect571r1 /* = 14, */ }, |
- { 65535, ec_noName } |
-}; |
- |
-typedef struct ECDHEKeyPairStr { |
- ssl3KeyPair * pair; |
- int error; /* error code of the call-once function */ |
- PRCallOnceType once; |
-} ECDHEKeyPair; |
- |
-/* arrays of ECDHE KeyPairs */ |
-static ECDHEKeyPair gECDHEKeyPairs[ec_pastLastName]; |
- |
-SECStatus |
-ssl3_ECName2Params(PLArenaPool * arena, ECName curve, SECKEYECParams * params) |
-{ |
- SECOidData *oidData = NULL; |
- |
- if ((curve <= ec_noName) || (curve >= ec_pastLastName) || |
- ((oidData = SECOID_FindOIDByTag(ecName2OIDTag[curve])) == NULL)) { |
- PORT_SetError(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE); |
- return SECFailure; |
- } |
- |
- SECITEM_AllocItem(arena, params, (2 + oidData->oid.len)); |
- /* |
- * params->data needs to contain the ASN encoding of an object ID (OID) |
- * representing the named curve. The actual OID is in |
- * oidData->oid.data so we simply prepend 0x06 and OID length |
- */ |
- params->data[0] = SEC_ASN1_OBJECT_ID; |
- params->data[1] = oidData->oid.len; |
- memcpy(params->data + 2, oidData->oid.data, oidData->oid.len); |
- |
- return SECSuccess; |
-} |
- |
-static ECName |
-params2ecName(SECKEYECParams * params) |
-{ |
- SECItem oid = { siBuffer, NULL, 0}; |
- SECOidData *oidData = NULL; |
- ECName i; |
- |
- /* |
- * params->data needs to contain the ASN encoding of an object ID (OID) |
- * representing a named curve. Here, we strip away everything |
- * before the actual OID and use the OID to look up a named curve. |
- */ |
- if (params->data[0] != SEC_ASN1_OBJECT_ID) return ec_noName; |
- oid.len = params->len - 2; |
- oid.data = params->data + 2; |
- if ((oidData = SECOID_FindOID(&oid)) == NULL) return ec_noName; |
- for (i = ec_noName + 1; i < ec_pastLastName; i++) { |
- if (ecName2OIDTag[i] == oidData->offset) |
- return i; |
- } |
- |
- return ec_noName; |
-} |
- |
-/* Caller must set hiLevel error code. */ |
-static SECStatus |
-ssl3_ComputeECDHKeyHash(SECOidTag hashAlg, |
- SECItem ec_params, SECItem server_ecpoint, |
- SSL3Random *client_rand, SSL3Random *server_rand, |
- SSL3Hashes *hashes, PRBool bypassPKCS11) |
-{ |
- PRUint8 * hashBuf; |
- PRUint8 * pBuf; |
- SECStatus rv = SECSuccess; |
- unsigned int bufLen; |
- /* |
- * XXX For now, we only support named curves (the appropriate |
- * checks are made before this method is called) so ec_params |
- * takes up only two bytes. ECPoint needs to fit in 256 bytes |
- * (because the spec says the length must fit in one byte) |
- */ |
- PRUint8 buf[2*SSL3_RANDOM_LENGTH + 2 + 1 + 256]; |
- |
- bufLen = 2*SSL3_RANDOM_LENGTH + ec_params.len + 1 + server_ecpoint.len; |
- if (bufLen <= sizeof buf) { |
- hashBuf = buf; |
- } else { |
- hashBuf = PORT_Alloc(bufLen); |
- if (!hashBuf) { |
- return SECFailure; |
- } |
- } |
- |
- memcpy(hashBuf, client_rand, SSL3_RANDOM_LENGTH); |
- pBuf = hashBuf + SSL3_RANDOM_LENGTH; |
- memcpy(pBuf, server_rand, SSL3_RANDOM_LENGTH); |
- pBuf += SSL3_RANDOM_LENGTH; |
- memcpy(pBuf, ec_params.data, ec_params.len); |
- pBuf += ec_params.len; |
- pBuf[0] = (PRUint8)(server_ecpoint.len); |
- pBuf += 1; |
- memcpy(pBuf, server_ecpoint.data, server_ecpoint.len); |
- pBuf += server_ecpoint.len; |
- PORT_Assert((unsigned int)(pBuf - hashBuf) == bufLen); |
- |
- rv = ssl3_ComputeCommonKeyHash(hashAlg, hashBuf, bufLen, hashes, |
- bypassPKCS11); |
- |
- PRINT_BUF(95, (NULL, "ECDHkey hash: ", hashBuf, bufLen)); |
- PRINT_BUF(95, (NULL, "ECDHkey hash: MD5 result", |
- hashes->u.s.md5, MD5_LENGTH)); |
- PRINT_BUF(95, (NULL, "ECDHkey hash: SHA1 result", |
- hashes->u.s.sha, SHA1_LENGTH)); |
- |
- if (hashBuf != buf) |
- PORT_Free(hashBuf); |
- 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; |
- 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, |
- SECKEYPublicKey *srvrPubKey, |
- SECKEYPrivateKey *srvrPrivKey) |
-{ |
- PK11SymKey * pms; |
- SECStatus rv; |
- SECKEYPublicKey clntPubKey; |
- CK_MECHANISM_TYPE target; |
- PRBool isTLS, isTLS12; |
- |
- PORT_Assert( ss->opt.noLocks || ssl_HaveRecvBufLock(ss) ); |
- PORT_Assert( ss->opt.noLocks || ssl_HaveSSL3HandshakeLock(ss) ); |
- |
- clntPubKey.keyType = ecKey; |
- clntPubKey.u.ec.DEREncodedParams.len = |
- srvrPubKey->u.ec.DEREncodedParams.len; |
- clntPubKey.u.ec.DEREncodedParams.data = |
- srvrPubKey->u.ec.DEREncodedParams.data; |
- |
- rv = ssl3_ConsumeHandshakeVariable(ss, &clntPubKey.u.ec.publicValue, |
- 1, &b, &length); |
- if (rv != SECSuccess) { |
- SEND_ALERT |
- return SECFailure; /* XXX Who sets the error code?? */ |
- } |
- |
- 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_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(srvrPrivKey, &clntPubKey, PR_FALSE, NULL, NULL, |
- CKM_ECDH1_DERIVE, target, CKA_DERIVE, 0, |
- CKD_NULL, NULL, NULL); |
- |
- if (pms == NULL) { |
- /* last gasp. */ |
- ssl_MapLowLevelError(SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE); |
- return SECFailure; |
- } |
- |
- rv = ssl3_InitPendingCipherSpec(ss, pms); |
- PK11_FreeSymKey(pms); |
- if (rv != SECSuccess) { |
- SEND_ALERT |
- return SECFailure; /* error code set by ssl3_InitPendingCipherSpec */ |
- } |
- return SECSuccess; |
-} |
- |
-ECName |
-ssl3_GetCurveWithECKeyStrength(PRUint32 curvemsk, int requiredECCbits) |
-{ |
- int i; |
- |
- for ( i = 0; bits2curve[i].curve != ec_noName; i++) { |
- if (bits2curve[i].bits < requiredECCbits) |
- continue; |
- if (SSL_IS_CURVE_NEGOTIATED(curvemsk, bits2curve[i].curve)) { |
- return bits2curve[i].curve; |
- } |
- } |
- PORT_SetError(SSL_ERROR_NO_CYPHER_OVERLAP); |
- return ec_noName; |
-} |
- |
-/* find the "weakest link". Get strength of signature key and of sym key. |
- * choose curve for the weakest of those two. |
- */ |
-ECName |
-ssl3_GetCurveNameForServerSocket(sslSocket *ss) |
-{ |
- SECKEYPublicKey * svrPublicKey = NULL; |
- ECName ec_curve = ec_noName; |
- int signatureKeyStrength = 521; |
- int requiredECCbits = ss->sec.secretKeyBits * 2; |
- |
- if (ss->ssl3.hs.kea_def->kea == kea_ecdhe_ecdsa) { |
- svrPublicKey = SSL_GET_SERVER_PUBLIC_KEY(ss, kt_ecdh); |
- if (svrPublicKey) |
- ec_curve = params2ecName(&svrPublicKey->u.ec.DEREncodedParams); |
- if (!SSL_IS_CURVE_NEGOTIATED(ss->ssl3.hs.negotiatedECCurves, ec_curve)) { |
- PORT_SetError(SSL_ERROR_NO_CYPHER_OVERLAP); |
- return ec_noName; |
- } |
- signatureKeyStrength = curve2bits[ ec_curve ]; |
- } else { |
- /* RSA is our signing cert */ |
- int serverKeyStrengthInBits; |
- |
- svrPublicKey = SSL_GET_SERVER_PUBLIC_KEY(ss, kt_rsa); |
- if (!svrPublicKey) { |
- PORT_SetError(SSL_ERROR_NO_CYPHER_OVERLAP); |
- return ec_noName; |
- } |
- |
- /* currently strength in bytes */ |
- serverKeyStrengthInBits = svrPublicKey->u.rsa.modulus.len; |
- if (svrPublicKey->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; |
- |
- return ssl3_GetCurveWithECKeyStrength(ss->ssl3.hs.negotiatedECCurves, |
- requiredECCbits); |
-} |
- |
-/* function to clear out the lists */ |
-static SECStatus |
-ssl3_ShutdownECDHECurves(void *appData, void *nssData) |
-{ |
- int i; |
- ECDHEKeyPair *keyPair = &gECDHEKeyPairs[0]; |
- |
- for (i=0; i < ec_pastLastName; i++, keyPair++) { |
- if (keyPair->pair) { |
- ssl3_FreeKeyPair(keyPair->pair); |
- } |
- } |
- memset(gECDHEKeyPairs, 0, sizeof gECDHEKeyPairs); |
- return SECSuccess; |
-} |
- |
-static PRStatus |
-ssl3_ECRegister(void) |
-{ |
- SECStatus rv; |
- rv = NSS_RegisterShutdown(ssl3_ShutdownECDHECurves, gECDHEKeyPairs); |
- if (rv != SECSuccess) { |
- gECDHEKeyPairs[ec_noName].error = PORT_GetError(); |
- } |
- return (PRStatus)rv; |
-} |
- |
-/* CallOnce function, called once for each named curve. */ |
-static PRStatus |
-ssl3_CreateECDHEphemeralKeyPair(void * arg) |
-{ |
- SECKEYPrivateKey * privKey = NULL; |
- SECKEYPublicKey * pubKey = NULL; |
- ssl3KeyPair * keyPair = NULL; |
- ECName ec_curve = (ECName)arg; |
- SECKEYECParams ecParams = { siBuffer, NULL, 0 }; |
- |
- PORT_Assert(gECDHEKeyPairs[ec_curve].pair == NULL); |
- |
- /* ok, no one has generated a global key for this curve yet, do so */ |
- if (ssl3_ECName2Params(NULL, ec_curve, &ecParams) != SECSuccess) { |
- gECDHEKeyPairs[ec_curve].error = PORT_GetError(); |
- return PR_FAILURE; |
- } |
- |
- privKey = SECKEY_CreateECPrivateKey(&ecParams, &pubKey, NULL); |
- SECITEM_FreeItem(&ecParams, PR_FALSE); |
- |
- if (!privKey || !pubKey || !(keyPair = ssl3_NewKeyPair(privKey, pubKey))) { |
- if (privKey) { |
- SECKEY_DestroyPrivateKey(privKey); |
- } |
- if (pubKey) { |
- SECKEY_DestroyPublicKey(pubKey); |
- } |
- ssl_MapLowLevelError(SEC_ERROR_KEYGEN_FAIL); |
- gECDHEKeyPairs[ec_curve].error = PORT_GetError(); |
- return PR_FAILURE; |
- } |
- |
- gECDHEKeyPairs[ec_curve].pair = keyPair; |
- return PR_SUCCESS; |
-} |
- |
-/* |
- * Creates the ephemeral public and private ECDH keys used by |
- * server in ECDHE_RSA and ECDHE_ECDSA handshakes. |
- * For now, the elliptic curve is chosen to be the same |
- * strength as the signing certificate (ECC or RSA). |
- * We need an API to specify the curve. This won't be a real |
- * issue until we further develop server-side support for ECC |
- * cipher suites. |
- */ |
-static SECStatus |
-ssl3_CreateECDHEphemeralKeys(sslSocket *ss, ECName ec_curve) |
-{ |
- ssl3KeyPair * keyPair = NULL; |
- |
- /* if there's no global key for this curve, make one. */ |
- if (gECDHEKeyPairs[ec_curve].pair == NULL) { |
- PRStatus status; |
- |
- status = PR_CallOnce(&gECDHEKeyPairs[ec_noName].once, ssl3_ECRegister); |
- if (status != PR_SUCCESS) { |
- PORT_SetError(gECDHEKeyPairs[ec_noName].error); |
- return SECFailure; |
- } |
- status = PR_CallOnceWithArg(&gECDHEKeyPairs[ec_curve].once, |
- ssl3_CreateECDHEphemeralKeyPair, |
- (void *)ec_curve); |
- if (status != PR_SUCCESS) { |
- PORT_SetError(gECDHEKeyPairs[ec_curve].error); |
- return SECFailure; |
- } |
- } |
- |
- keyPair = gECDHEKeyPairs[ec_curve].pair; |
- PORT_Assert(keyPair != NULL); |
- if (!keyPair) |
- return SECFailure; |
- ss->ephemeralECDHKeyPair = ssl3_GetKeyPairRef(keyPair); |
- |
- return SECSuccess; |
-} |
- |
-SECStatus |
-ssl3_HandleECDHServerKeyExchange(sslSocket *ss, SSL3Opaque *b, PRUint32 length) |
-{ |
- PLArenaPool * arena = NULL; |
- SECKEYPublicKey *peerKey = NULL; |
- PRBool isTLS, isTLS12; |
- SECStatus rv; |
- int errCode = SSL_ERROR_RX_MALFORMED_SERVER_KEY_EXCH; |
- SSL3AlertDescription desc = illegal_parameter; |
- SSL3Hashes hashes; |
- SECItem signature = {siBuffer, NULL, 0}; |
- |
- SECItem ec_params = {siBuffer, NULL, 0}; |
- SECItem ec_point = {siBuffer, NULL, 0}; |
- unsigned char paramBuf[3]; /* only for curve_type == named_curve */ |
- SSL3SignatureAndHashAlgorithm sigAndHash; |
- |
- sigAndHash.hashAlg = SEC_OID_UNKNOWN; |
- |
- isTLS = (PRBool)(ss->ssl3.prSpec->version > SSL_LIBRARY_VERSION_3_0); |
- isTLS12 = (PRBool)(ss->ssl3.prSpec->version >= SSL_LIBRARY_VERSION_TLS_1_2); |
- |
- /* XXX This works only for named curves, revisit this when |
- * we support generic curves. |
- */ |
- ec_params.len = sizeof paramBuf; |
- ec_params.data = paramBuf; |
- rv = ssl3_ConsumeHandshake(ss, ec_params.data, ec_params.len, &b, &length); |
- if (rv != SECSuccess) { |
- goto loser; /* malformed. */ |
- } |
- |
- /* Fail if the curve is not a named curve */ |
- if ((ec_params.data[0] != ec_type_named) || |
- (ec_params.data[1] != 0) || |
- !supportedCurve(ec_params.data[2])) { |
- errCode = SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE; |
- desc = handshake_failure; |
- goto alert_loser; |
- } |
- |
- rv = ssl3_ConsumeHandshakeVariable(ss, &ec_point, 1, &b, &length); |
- if (rv != SECSuccess) { |
- goto loser; /* malformed. */ |
- } |
- /* Fail if the ec point uses compressed representation */ |
- if (ec_point.data[0] != EC_POINT_FORM_UNCOMPRESSED) { |
- errCode = SEC_ERROR_UNSUPPORTED_EC_POINT_FORM; |
- desc = handshake_failure; |
- goto alert_loser; |
- } |
- |
- if (isTLS12) { |
- rv = ssl3_ConsumeSignatureAndHashAlgorithm(ss, &b, &length, |
- &sigAndHash); |
- if (rv != SECSuccess) { |
- goto loser; /* malformed or unsupported. */ |
- } |
- rv = ssl3_CheckSignatureAndHashAlgorithmConsistency( |
- &sigAndHash, ss->sec.peerCert); |
- if (rv != SECSuccess) { |
- goto loser; |
- } |
- } |
- |
- rv = ssl3_ConsumeHandshakeVariable(ss, &signature, 2, &b, &length); |
- if (rv != SECSuccess) { |
- goto loser; /* malformed. */ |
- } |
- |
- if (length != 0) { |
- if (isTLS) |
- desc = decode_error; |
- goto alert_loser; /* malformed. */ |
- } |
- |
- PRINT_BUF(60, (NULL, "Server EC params", ec_params.data, |
- ec_params.len)); |
- PRINT_BUF(60, (NULL, "Server EC point", ec_point.data, ec_point.len)); |
- |
- /* failures after this point are not malformed handshakes. */ |
- /* TLS: send decrypt_error if signature failed. */ |
- desc = isTLS ? decrypt_error : handshake_failure; |
- |
- /* |
- * check to make sure the hash is signed by right guy |
- */ |
- rv = ssl3_ComputeECDHKeyHash(sigAndHash.hashAlg, ec_params, ec_point, |
- &ss->ssl3.hs.client_random, |
- &ss->ssl3.hs.server_random, |
- &hashes, ss->opt.bypassPKCS11); |
- |
- if (rv != SECSuccess) { |
- errCode = |
- ssl_MapLowLevelError(SSL_ERROR_SERVER_KEY_EXCHANGE_FAILURE); |
- goto alert_loser; |
- } |
- rv = ssl3_VerifySignedHashes(&hashes, ss->sec.peerCert, &signature, |
- isTLS, ss->pkcs11PinArg); |
- if (rv != SECSuccess) { |
- errCode = |
- ssl_MapLowLevelError(SSL_ERROR_SERVER_KEY_EXCHANGE_FAILURE); |
- goto alert_loser; |
- } |
- |
- arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); |
- if (arena == NULL) { |
- goto no_memory; |
- } |
- |
- ss->sec.peerKey = peerKey = PORT_ArenaZNew(arena, SECKEYPublicKey); |
- if (peerKey == NULL) { |
- goto no_memory; |
- } |
- |
- peerKey->arena = arena; |
- peerKey->keyType = ecKey; |
- |
- /* set up EC parameters in peerKey */ |
- if (ssl3_ECName2Params(arena, ec_params.data[2], |
- &peerKey->u.ec.DEREncodedParams) != SECSuccess) { |
- /* we should never get here since we already |
- * checked that we are dealing with a supported curve |
- */ |
- errCode = SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE; |
- goto alert_loser; |
- } |
- |
- /* copy publicValue in peerKey */ |
- if (SECITEM_CopyItem(arena, &peerKey->u.ec.publicValue, &ec_point)) |
- { |
- PORT_FreeArena(arena, PR_FALSE); |
- goto no_memory; |
- } |
- peerKey->pkcs11Slot = NULL; |
- peerKey->pkcs11ID = CK_INVALID_HANDLE; |
- |
- ss->sec.peerKey = peerKey; |
- ss->ssl3.hs.ws = wait_cert_request; |
- |
- return SECSuccess; |
- |
-alert_loser: |
- (void)SSL3_SendAlert(ss, alert_fatal, desc); |
-loser: |
- PORT_SetError( errCode ); |
- return SECFailure; |
- |
-no_memory: /* no-memory error has already been set. */ |
- ssl_MapLowLevelError(SSL_ERROR_SERVER_KEY_EXCHANGE_FAILURE); |
- return SECFailure; |
-} |
- |
-SECStatus |
-ssl3_SendECDHServerKeyExchange( |
- sslSocket *ss, |
- const SSL3SignatureAndHashAlgorithm *sigAndHash) |
-{ |
- const ssl3KEADef * kea_def = ss->ssl3.hs.kea_def; |
- SECStatus rv = SECFailure; |
- int length; |
- PRBool isTLS, isTLS12; |
- SECItem signed_hash = {siBuffer, NULL, 0}; |
- SSL3Hashes hashes; |
- |
- SECKEYPublicKey * ecdhePub; |
- SECItem ec_params = {siBuffer, NULL, 0}; |
- unsigned char paramBuf[3]; |
- ECName curve; |
- SSL3KEAType certIndex; |
- |
- /* Generate ephemeral ECDH key pair and send the public key */ |
- curve = ssl3_GetCurveNameForServerSocket(ss); |
- if (curve == ec_noName) { |
- goto loser; |
- } |
- rv = ssl3_CreateECDHEphemeralKeys(ss, curve); |
- if (rv != SECSuccess) { |
- goto loser; /* err set by AppendHandshake. */ |
- } |
- ecdhePub = ss->ephemeralECDHKeyPair->pubKey; |
- PORT_Assert(ecdhePub != NULL); |
- if (!ecdhePub) { |
- PORT_SetError(SSL_ERROR_SERVER_KEY_EXCHANGE_FAILURE); |
- return SECFailure; |
- } |
- |
- ec_params.len = sizeof paramBuf; |
- ec_params.data = paramBuf; |
- curve = params2ecName(&ecdhePub->u.ec.DEREncodedParams); |
- if (curve != ec_noName) { |
- ec_params.data[0] = ec_type_named; |
- ec_params.data[1] = 0x00; |
- ec_params.data[2] = curve; |
- } else { |
- PORT_SetError(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE); |
- goto loser; |
- } |
- |
- rv = ssl3_ComputeECDHKeyHash(sigAndHash->hashAlg, |
- ec_params, |
- ecdhePub->u.ec.publicValue, |
- &ss->ssl3.hs.client_random, |
- &ss->ssl3.hs.server_random, |
- &hashes, ss->opt.bypassPKCS11); |
- if (rv != SECSuccess) { |
- ssl_MapLowLevelError(SSL_ERROR_SERVER_KEY_EXCHANGE_FAILURE); |
- goto loser; |
- } |
- |
- isTLS = (PRBool)(ss->ssl3.pwSpec->version > SSL_LIBRARY_VERSION_3_0); |
- isTLS12 = (PRBool)(ss->ssl3.pwSpec->version >= SSL_LIBRARY_VERSION_TLS_1_2); |
- |
- /* XXX SSLKEAType isn't really a good choice for |
- * indexing certificates but that's all we have |
- * for now. |
- */ |
- if (kea_def->kea == kea_ecdhe_rsa) |
- certIndex = kt_rsa; |
- else /* kea_def->kea == kea_ecdhe_ecdsa */ |
- certIndex = kt_ecdh; |
- |
- rv = ssl3_SignHashes(&hashes, ss->serverCerts[certIndex].SERVERKEY, |
- &signed_hash, isTLS); |
- if (rv != SECSuccess) { |
- goto loser; /* ssl3_SignHashes has set err. */ |
- } |
- if (signed_hash.data == NULL) { |
- /* how can this happen and rv == SECSuccess ?? */ |
- PORT_SetError(SSL_ERROR_SERVER_KEY_EXCHANGE_FAILURE); |
- goto loser; |
- } |
- |
- length = ec_params.len + |
- 1 + ecdhePub->u.ec.publicValue.len + |
- (isTLS12 ? 2 : 0) + 2 + signed_hash.len; |
- |
- rv = ssl3_AppendHandshakeHeader(ss, server_key_exchange, length); |
- if (rv != SECSuccess) { |
- goto loser; /* err set by AppendHandshake. */ |
- } |
- |
- rv = ssl3_AppendHandshake(ss, ec_params.data, ec_params.len); |
- if (rv != SECSuccess) { |
- goto loser; /* err set by AppendHandshake. */ |
- } |
- |
- rv = ssl3_AppendHandshakeVariable(ss, ecdhePub->u.ec.publicValue.data, |
- ecdhePub->u.ec.publicValue.len, 1); |
- if (rv != SECSuccess) { |
- goto loser; /* err set by AppendHandshake. */ |
- } |
- |
- if (isTLS12) { |
- rv = ssl3_AppendSignatureAndHashAlgorithm(ss, sigAndHash); |
- if (rv != SECSuccess) { |
- goto loser; /* err set by AppendHandshake. */ |
- } |
- } |
- |
- rv = ssl3_AppendHandshakeVariable(ss, signed_hash.data, |
- signed_hash.len, 2); |
- if (rv != SECSuccess) { |
- goto loser; /* err set by AppendHandshake. */ |
- } |
- |
- PORT_Free(signed_hash.data); |
- return SECSuccess; |
- |
-loser: |
- if (signed_hash.data != NULL) |
- PORT_Free(signed_hash.data); |
- return SECFailure; |
-} |
- |
-/* Lists of ECC cipher suites for searching and disabling. */ |
- |
-static const ssl3CipherSuite ecdh_suites[] = { |
- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_NULL_SHA, |
- TLS_ECDH_ECDSA_WITH_RC4_128_SHA, |
- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDH_RSA_WITH_NULL_SHA, |
- TLS_ECDH_RSA_WITH_RC4_128_SHA, |
- 0 /* end of list marker */ |
-}; |
- |
-static const ssl3CipherSuite ecdh_ecdsa_suites[] = { |
- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_NULL_SHA, |
- TLS_ECDH_ECDSA_WITH_RC4_128_SHA, |
- 0 /* end of list marker */ |
-}; |
- |
-static const ssl3CipherSuite ecdh_rsa_suites[] = { |
- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDH_RSA_WITH_NULL_SHA, |
- TLS_ECDH_RSA_WITH_RC4_128_SHA, |
- 0 /* end of list marker */ |
-}; |
- |
-static const ssl3CipherSuite ecdhe_ecdsa_suites[] = { |
- TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, |
- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, |
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, |
- TLS_ECDHE_ECDSA_WITH_NULL_SHA, |
- TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, |
- 0 /* end of list marker */ |
-}; |
- |
-static const ssl3CipherSuite ecdhe_rsa_suites[] = { |
- TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, |
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, |
- TLS_ECDHE_RSA_WITH_NULL_SHA, |
- TLS_ECDHE_RSA_WITH_RC4_128_SHA, |
- 0 /* end of list marker */ |
-}; |
- |
-/* List of all ECC cipher suites */ |
-static const ssl3CipherSuite ecSuites[] = { |
- TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, |
- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, |
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, |
- TLS_ECDHE_ECDSA_WITH_NULL_SHA, |
- TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, |
- TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, |
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, |
- TLS_ECDHE_RSA_WITH_NULL_SHA, |
- TLS_ECDHE_RSA_WITH_RC4_128_SHA, |
- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDH_ECDSA_WITH_NULL_SHA, |
- TLS_ECDH_ECDSA_WITH_RC4_128_SHA, |
- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, |
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, |
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, |
- TLS_ECDH_RSA_WITH_NULL_SHA, |
- TLS_ECDH_RSA_WITH_RC4_128_SHA, |
- 0 /* end of list marker */ |
-}; |
- |
-/* On this socket, Disable the ECC cipher suites in the argument's list */ |
-SECStatus |
-ssl3_DisableECCSuites(sslSocket * ss, const ssl3CipherSuite * suite) |
-{ |
- if (!suite) |
- suite = ecSuites; |
- for (; *suite; ++suite) { |
- SECStatus rv = ssl3_CipherPrefSet(ss, *suite, PR_FALSE); |
- |
- PORT_Assert(rv == SECSuccess); /* else is coding error */ |
- } |
- return SECSuccess; |
-} |
- |
-/* Look at the server certs configured on this socket, and disable any |
- * ECC cipher suites that are not supported by those certs. |
- */ |
-void |
-ssl3_FilterECCipherSuitesByServerCerts(sslSocket * ss) |
-{ |
- CERTCertificate * svrCert; |
- |
- svrCert = ss->serverCerts[kt_rsa].serverCert; |
- if (!svrCert) { |
- ssl3_DisableECCSuites(ss, ecdhe_rsa_suites); |
- } |
- |
- svrCert = ss->serverCerts[kt_ecdh].serverCert; |
- if (!svrCert) { |
- ssl3_DisableECCSuites(ss, ecdh_suites); |
- ssl3_DisableECCSuites(ss, ecdhe_ecdsa_suites); |
- } else { |
- SECOidTag sigTag = SECOID_GetAlgorithmTag(&svrCert->signature); |
- |
- switch (sigTag) { |
- case SEC_OID_PKCS1_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_MD4_WITH_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_SHA224_WITH_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_SHA384_WITH_RSA_ENCRYPTION: |
- case SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION: |
- ssl3_DisableECCSuites(ss, ecdh_ecdsa_suites); |
- break; |
- case SEC_OID_ANSIX962_ECDSA_SHA1_SIGNATURE: |
- case SEC_OID_ANSIX962_ECDSA_SHA224_SIGNATURE: |
- case SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE: |
- case SEC_OID_ANSIX962_ECDSA_SHA384_SIGNATURE: |
- case SEC_OID_ANSIX962_ECDSA_SHA512_SIGNATURE: |
- case SEC_OID_ANSIX962_ECDSA_SIGNATURE_RECOMMENDED_DIGEST: |
- case SEC_OID_ANSIX962_ECDSA_SIGNATURE_SPECIFIED_DIGEST: |
- ssl3_DisableECCSuites(ss, ecdh_rsa_suites); |
- break; |
- default: |
- ssl3_DisableECCSuites(ss, ecdh_suites); |
- break; |
- } |
- } |
-} |
- |
-/* Ask: is ANY ECC cipher suite enabled on this socket? */ |
-/* Order(N^2). Yuk. Also, this ignores export policy. */ |
-PRBool |
-ssl3_IsECCEnabled(sslSocket * ss) |
-{ |
- const ssl3CipherSuite * suite; |
- PK11SlotInfo *slot; |
- |
- /* make sure we can do ECC */ |
- slot = PK11_GetBestSlot(CKM_ECDH1_DERIVE, ss->pkcs11PinArg); |
- if (!slot) { |
- return PR_FALSE; |
- } |
- PK11_FreeSlot(slot); |
- |
- /* make sure an ECC cipher is enabled */ |
- for (suite = ecSuites; *suite; ++suite) { |
- PRBool enabled = PR_FALSE; |
- SECStatus rv = ssl3_CipherPrefGet(ss, *suite, &enabled); |
- |
- PORT_Assert(rv == SECSuccess); /* else is coding error */ |
- if (rv == SECSuccess && enabled) |
- return PR_TRUE; |
- } |
- return PR_FALSE; |
-} |
- |
-#define BE(n) 0, n |
- |
-/* Prefabricated TLS client hello extension, Elliptic Curves List, |
- * offers only 3 curves, the Suite B curves, 23-25 |
- */ |
-static const PRUint8 suiteBECList[12] = { |
- BE(10), /* Extension type */ |
- BE( 8), /* octets that follow ( 3 pairs + 1 length pair) */ |
- BE( 6), /* octets that follow ( 3 pairs) */ |
- BE(23), BE(24), BE(25) |
-}; |
- |
-/* Prefabricated TLS client hello extension, Elliptic Curves List, |
- * offers curves 1-25. |
- */ |
-static const PRUint8 tlsECList[56] = { |
- BE(10), /* Extension type */ |
- BE(52), /* octets that follow (25 pairs + 1 length pair) */ |
- BE(50), /* octets that follow (25 pairs) */ |
- BE( 1), BE( 2), BE( 3), BE( 4), BE( 5), BE( 6), BE( 7), |
- BE( 8), BE( 9), BE(10), BE(11), BE(12), BE(13), BE(14), BE(15), |
- BE(16), BE(17), BE(18), BE(19), BE(20), BE(21), BE(22), BE(23), |
- BE(24), BE(25) |
-}; |
- |
-static const PRUint8 ecPtFmt[6] = { |
- BE(11), /* Extension type */ |
- BE( 2), /* octets that follow */ |
- 1, /* octets that follow */ |
- 0 /* uncompressed type only */ |
-}; |
- |
-/* This function already presumes we can do ECC, ssl3_IsECCEnabled must be |
- * called before this function. It looks to see if we have a token which |
- * is capable of doing smaller than SuiteB curves. If the token can, we |
- * presume the token can do the whole SSL suite of curves. If it can't we |
- * presume the token that allowed ECC to be enabled can only do suite B |
- * curves. */ |
-static PRBool |
-ssl3_SuiteBOnly(sslSocket *ss) |
-{ |
-#if 0 |
- /* See if we can support small curves (like 163). If not, assume we can |
- * only support Suite-B curves (P-256, P-384, P-521). */ |
- PK11SlotInfo *slot = |
- PK11_GetBestSlotWithAttributes(CKM_ECDH1_DERIVE, 0, 163, |
- ss ? ss->pkcs11PinArg : NULL); |
- |
- if (!slot) { |
- /* nope, presume we can only do suite B */ |
- return PR_TRUE; |
- } |
- /* we can, presume we can do all curves */ |
- PK11_FreeSlot(slot); |
- return PR_FALSE; |
-#else |
- return PR_TRUE; |
-#endif |
-} |
- |
-/* Send our "canned" (precompiled) Supported Elliptic Curves extension, |
- * which says that we support all TLS-defined named curves. |
- */ |
-PRInt32 |
-ssl3_SendSupportedCurvesXtn( |
- sslSocket * ss, |
- PRBool append, |
- PRUint32 maxBytes) |
-{ |
- PRInt32 ecListSize = 0; |
- const PRUint8 *ecList = NULL; |
- |
- if (!ss || !ssl3_IsECCEnabled(ss)) |
- return 0; |
- |
- if (ssl3_SuiteBOnly(ss)) { |
- ecListSize = sizeof suiteBECList; |
- ecList = suiteBECList; |
- } else { |
- ecListSize = sizeof tlsECList; |
- ecList = tlsECList; |
- } |
- |
- if (append && maxBytes >= ecListSize) { |
- SECStatus rv = ssl3_AppendHandshake(ss, ecList, ecListSize); |
- if (rv != SECSuccess) |
- return -1; |
- if (!ss->sec.isServer) { |
- TLSExtensionData *xtnData = &ss->xtnData; |
- xtnData->advertised[xtnData->numAdvertised++] = |
- ssl_elliptic_curves_xtn; |
- } |
- } |
- return ecListSize; |
-} |
- |
-PRUint32 |
-ssl3_GetSupportedECCurveMask(sslSocket *ss) |
-{ |
- if (ssl3_SuiteBOnly(ss)) { |
- return SSL3_SUITE_B_SUPPORTED_CURVES_MASK; |
- } |
- return SSL3_ALL_SUPPORTED_CURVES_MASK; |
-} |
- |
-/* Send our "canned" (precompiled) Supported Point Formats extension, |
- * which says that we only support uncompressed points. |
- */ |
-PRInt32 |
-ssl3_SendSupportedPointFormatsXtn( |
- sslSocket * ss, |
- PRBool append, |
- PRUint32 maxBytes) |
-{ |
- if (!ss || !ssl3_IsECCEnabled(ss)) |
- return 0; |
- if (append && maxBytes >= (sizeof ecPtFmt)) { |
- SECStatus rv = ssl3_AppendHandshake(ss, ecPtFmt, (sizeof ecPtFmt)); |
- if (rv != SECSuccess) |
- return -1; |
- if (!ss->sec.isServer) { |
- TLSExtensionData *xtnData = &ss->xtnData; |
- xtnData->advertised[xtnData->numAdvertised++] = |
- ssl_ec_point_formats_xtn; |
- } |
- } |
- return (sizeof ecPtFmt); |
-} |
- |
-/* Just make sure that the remote client supports uncompressed points, |
- * Since that is all we support. Disable ECC cipher suites if it doesn't. |
- */ |
-SECStatus |
-ssl3_HandleSupportedPointFormatsXtn(sslSocket *ss, PRUint16 ex_type, |
- SECItem *data) |
-{ |
- int i; |
- |
- if (data->len < 2 || data->len > 255 || !data->data || |
- data->len != (unsigned int)data->data[0] + 1) { |
- /* malformed */ |
- goto loser; |
- } |
- for (i = data->len; --i > 0; ) { |
- if (data->data[i] == 0) { |
- /* indicate that we should send a reply */ |
- SECStatus rv; |
- rv = ssl3_RegisterServerHelloExtensionSender(ss, ex_type, |
- &ssl3_SendSupportedPointFormatsXtn); |
- return rv; |
- } |
- } |
-loser: |
- /* evil client doesn't support uncompressed */ |
- ssl3_DisableECCSuites(ss, ecSuites); |
- return SECFailure; |
-} |
- |
- |
-#define SSL3_GET_SERVER_PUBLICKEY(sock, type) \ |
- (ss->serverCerts[type].serverKeyPair ? \ |
- ss->serverCerts[type].serverKeyPair->pubKey : NULL) |
- |
-/* Extract the TLS curve name for the public key in our EC server cert. */ |
-ECName ssl3_GetSvrCertCurveName(sslSocket *ss) |
-{ |
- SECKEYPublicKey *srvPublicKey; |
- ECName ec_curve = ec_noName; |
- |
- srvPublicKey = SSL3_GET_SERVER_PUBLICKEY(ss, kt_ecdh); |
- if (srvPublicKey) { |
- ec_curve = params2ecName(&srvPublicKey->u.ec.DEREncodedParams); |
- } |
- return ec_curve; |
-} |
- |
-/* Ensure that the curve in our server cert is one of the ones suppored |
- * by the remote client, and disable all ECC cipher suites if not. |
- */ |
-SECStatus |
-ssl3_HandleSupportedCurvesXtn(sslSocket *ss, PRUint16 ex_type, SECItem *data) |
-{ |
- PRInt32 list_len; |
- PRUint32 peerCurves = 0; |
- PRUint32 mutualCurves = 0; |
- PRUint16 svrCertCurveName; |
- |
- if (!data->data || data->len < 4 || data->len > 65535) |
- goto loser; |
- /* get the length of elliptic_curve_list */ |
- list_len = ssl3_ConsumeHandshakeNumber(ss, 2, &data->data, &data->len); |
- if (list_len < 0 || data->len != list_len || (data->len % 2) != 0) { |
- /* malformed */ |
- goto loser; |
- } |
- /* build bit vector of peer's supported curve names */ |
- while (data->len) { |
- PRInt32 curve_name = |
- ssl3_ConsumeHandshakeNumber(ss, 2, &data->data, &data->len); |
- if (curve_name > ec_noName && curve_name < ec_pastLastName) { |
- peerCurves |= (1U << curve_name); |
- } |
- } |
- /* What curves do we support in common? */ |
- mutualCurves = ss->ssl3.hs.negotiatedECCurves &= peerCurves; |
- if (!mutualCurves) { /* no mutually supported EC Curves */ |
- goto loser; |
- } |
- |
- /* if our ECC cert doesn't use one of these supported curves, |
- * disable ECC cipher suites that require an ECC cert. |
- */ |
- svrCertCurveName = ssl3_GetSvrCertCurveName(ss); |
- if (svrCertCurveName != ec_noName && |
- (mutualCurves & (1U << svrCertCurveName)) != 0) { |
- return SECSuccess; |
- } |
- /* Our EC cert doesn't contain a mutually supported curve. |
- * Disable all ECC cipher suites that require an EC cert |
- */ |
- ssl3_DisableECCSuites(ss, ecdh_ecdsa_suites); |
- ssl3_DisableECCSuites(ss, ecdhe_ecdsa_suites); |
- return SECFailure; |
- |
-loser: |
- /* no common curve supported */ |
- ssl3_DisableECCSuites(ss, ecSuites); |
- return SECFailure; |
-} |
- |
-#endif /* NSS_ENABLE_ECC */ |