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ssl3con.c
13267 lines (11770 loc) · 458 KB
/
ssl3con.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* 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/. */
/* TODO(ekr): Implement HelloVerifyRequest on server side. OK for now. */
#include "cert.h"
#include "ssl.h"
#include "cryptohi.h" /* for DSAU_ stuff */
#include "keyhi.h"
#include "secder.h"
#include "secitem.h"
#include "sechash.h"
#include "sslimpl.h"
#include "sslproto.h"
#include "sslerr.h"
#include "ssl3ext.h"
#include "ssl3exthandle.h"
#include "prtime.h"
#include "prinrval.h"
#include "prerror.h"
#include "pratom.h"
#include "prthread.h"
#include "nss.h"
#include "nssoptions.h"
#include "pk11func.h"
#include "secmod.h"
#include "blapi.h"
#include <stdio.h>
#ifdef NSS_SSL_ENABLE_ZLIB
#include "zlib.h"
#endif
static PK11SymKey *ssl3_GenerateRSAPMS(sslSocket *ss, ssl3CipherSpec *spec,
PK11SlotInfo *serverKeySlot);
static SECStatus ssl3_DeriveMasterSecret(sslSocket *ss, PK11SymKey *pms);
static SECStatus ssl3_DeriveConnectionKeys(sslSocket *ss);
static SECStatus ssl3_HandshakeFailure(sslSocket *ss);
static SECStatus ssl3_SendCertificate(sslSocket *ss);
static SECStatus ssl3_SendCertificateRequest(sslSocket *ss);
static SECStatus ssl3_SendNextProto(sslSocket *ss);
static SECStatus ssl3_SendFinished(sslSocket *ss, PRInt32 flags);
static SECStatus ssl3_SendServerHelloDone(sslSocket *ss);
static SECStatus ssl3_SendServerKeyExchange(sslSocket *ss);
static SECStatus ssl3_HandleClientHelloPart2(sslSocket *ss,
SECItem *suites,
SECItem *comps,
sslSessionID *sid);
static SECStatus ssl3_HandleServerHelloPart2(sslSocket *ss,
const SECItem *sidBytes,
int *retErrCode);
static SECStatus ssl3_HandlePostHelloHandshakeMessage(sslSocket *ss,
PRUint8 *b,
PRUint32 length,
SSL3Hashes *hashesPtr);
static SECStatus ssl3_FlushHandshakeMessages(sslSocket *ss, PRInt32 flags);
static SECStatus Null_Cipher(void *ctx, unsigned char *output, int *outputLen,
int maxOutputLen, const unsigned char *input,
int inputLen);
static CK_MECHANISM_TYPE ssl3_GetHashMechanismByHashType(SSLHashType hashType);
static CK_MECHANISM_TYPE ssl3_GetMgfMechanismByHashType(SSLHashType hash);
PRBool ssl_IsRsaPssSignatureScheme(SSLSignatureScheme scheme);
#define MAX_SEND_BUF_LENGTH 32000 /* watch for 16-bit integer overflow */
#define MIN_SEND_BUF_LENGTH 4000
/* This list of SSL3 cipher suites is sorted in descending order of
* precedence (desirability). It only includes cipher suites we implement.
* This table is modified by SSL3_SetPolicy(). The ordering of cipher suites
* in this table must match the ordering in SSL_ImplementedCiphers (sslenum.c)
*
* Important: See bug 946147 before enabling, reordering, or adding any cipher
* suites to this list.
*/
/* clang-format off */
static ssl3CipherSuiteCfg cipherSuites[ssl_V3_SUITES_IMPLEMENTED] = {
/* cipher_suite policy enabled isPresent */
/* Special TLS 1.3 suites. */
{ TLS_AES_128_GCM_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE },
{ TLS_CHACHA20_POLY1305_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE },
{ TLS_AES_256_GCM_SHA384, SSL_ALLOWED, PR_TRUE, PR_FALSE },
{ TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, SSL_ALLOWED, PR_FALSE, PR_FALSE},
/* TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA is out of order to work around
* bug 946147.
*/
{ TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_RC4_128_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256,SSL_ALLOWED,PR_TRUE, PR_FALSE},
{ TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_RSA_WITH_AES_128_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_DSS_WITH_AES_128_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_RSA_WITH_AES_256_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_DSS_WITH_AES_256_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_DHE_DSS_WITH_RC4_128_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_ECDSA_WITH_RC4_128_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_RSA_WITH_RC4_128_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
/* RSA */
{ TLS_RSA_WITH_AES_128_GCM_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_RSA_WITH_AES_256_GCM_SHA384, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_AES_128_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_RSA_WITH_AES_128_CBC_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_RSA_WITH_CAMELLIA_128_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_AES_256_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_RSA_WITH_AES_256_CBC_SHA256, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_RSA_WITH_CAMELLIA_256_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_SEED_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_3DES_EDE_CBC_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_RSA_WITH_RC4_128_SHA, SSL_ALLOWED, PR_TRUE, PR_FALSE},
{ TLS_RSA_WITH_RC4_128_MD5, SSL_ALLOWED, PR_TRUE, PR_FALSE},
/* 56-bit DES "domestic" cipher suites */
{ TLS_DHE_RSA_WITH_DES_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_DHE_DSS_WITH_DES_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_DES_CBC_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
/* ciphersuites with no encryption */
{ TLS_ECDHE_ECDSA_WITH_NULL_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDHE_RSA_WITH_NULL_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_RSA_WITH_NULL_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_ECDH_ECDSA_WITH_NULL_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_NULL_SHA, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_NULL_SHA256, SSL_ALLOWED, PR_FALSE, PR_FALSE},
{ TLS_RSA_WITH_NULL_MD5, SSL_ALLOWED, PR_FALSE, PR_FALSE},
};
/* clang-format on */
/* This is the default supported set of signature schemes. The order of the
* hashes here is all that is important, since that will (sometimes) determine
* which hash we use. The key pair (i.e., cert) is the primary thing that
* determines what we use and this doesn't affect how we select key pairs. The
* order of signature types is based on the same rules for ordering we use for
* cipher suites just for consistency.
*/
static const SSLSignatureScheme defaultSignatureSchemes[] = {
ssl_sig_ecdsa_secp256r1_sha256,
ssl_sig_ecdsa_secp384r1_sha384,
ssl_sig_ecdsa_secp521r1_sha512,
ssl_sig_ecdsa_sha1,
ssl_sig_rsa_pss_sha256,
ssl_sig_rsa_pss_sha384,
ssl_sig_rsa_pss_sha512,
ssl_sig_rsa_pkcs1_sha256,
ssl_sig_rsa_pkcs1_sha384,
ssl_sig_rsa_pkcs1_sha512,
ssl_sig_rsa_pkcs1_sha1,
ssl_sig_dsa_sha256,
ssl_sig_dsa_sha384,
ssl_sig_dsa_sha512,
ssl_sig_dsa_sha1
};
PR_STATIC_ASSERT(PR_ARRAY_SIZE(defaultSignatureSchemes) <=
MAX_SIGNATURE_SCHEMES);
/* Verify that SSL_ImplementedCiphers and cipherSuites are in consistent order.
*/
#ifdef DEBUG
void
ssl3_CheckCipherSuiteOrderConsistency()
{
unsigned int i;
PORT_Assert(SSL_NumImplementedCiphers == PR_ARRAY_SIZE(cipherSuites));
for (i = 0; i < PR_ARRAY_SIZE(cipherSuites); ++i) {
PORT_Assert(SSL_ImplementedCiphers[i] == cipherSuites[i].cipher_suite);
}
}
#endif
/* This list of SSL3 compression methods is sorted in descending order of
* precedence (desirability). It only includes compression methods we
* implement.
*/
static const SSLCompressionMethod ssl_compression_methods[] = {
#ifdef NSS_SSL_ENABLE_ZLIB
ssl_compression_deflate,
#endif
ssl_compression_null
};
static const unsigned int ssl_compression_method_count =
PR_ARRAY_SIZE(ssl_compression_methods);
/* compressionEnabled returns true iff the compression algorithm is enabled
* for the given SSL socket. */
static PRBool
ssl_CompressionEnabled(sslSocket *ss, SSLCompressionMethod compression)
{
SSL3ProtocolVersion version;
if (compression == ssl_compression_null) {
return PR_TRUE; /* Always enabled */
}
if (ss->sec.isServer) {
/* We can't easily check that the client didn't attempt TLS 1.3,
* so this will have to do. */
PORT_Assert(ss->version < SSL_LIBRARY_VERSION_TLS_1_3);
version = ss->version;
} else {
version = ss->vrange.max;
}
if (version >= SSL_LIBRARY_VERSION_TLS_1_3) {
return PR_FALSE;
}
#ifdef NSS_SSL_ENABLE_ZLIB
if (compression == ssl_compression_deflate) {
if (IS_DTLS(ss)) {
return PR_FALSE;
}
return ss->opt.enableDeflate;
}
#endif
return PR_FALSE;
}
static const /*SSL3ClientCertificateType */ PRUint8 certificate_types[] = {
ct_RSA_sign,
ct_ECDSA_sign,
ct_DSS_sign,
};
static SSL3Statistics ssl3stats;
/* Record protection algorithms, indexed by SSL3BulkCipher.
*
* The |max_records| field (|mr| below) is set to a number that is higher than
* recommended in some literature (esp. TLS 1.3) because we currently abort the
* connection when this limit is reached and we want to ensure that we only
* rarely hit this limit. See bug 1268745 for details.
*/
#define MR_MAX RECORD_SEQ_MAX /* 2^48-1 */
#define MR_128 (0x5aULL << 28) /* For AES and similar. */
#define MR_LOW (1ULL << 20) /* For weak ciphers. */
/* clang-format off */
static const ssl3BulkCipherDef bulk_cipher_defs[] = {
/* |--------- Lengths ---------| */
/* cipher calg : s : */
/* : e b n */
/* oid short_name mr : l o */
/* k r o t n */
/* e e i c a c */
/* y t type v k g e */
{cipher_null, calg_null, 0, 0, type_stream, 0, 0, 0, 0,
SEC_OID_NULL_CIPHER, "NULL", MR_MAX},
{cipher_rc4, calg_rc4, 16,16, type_stream, 0, 0, 0, 0,
SEC_OID_RC4, "RC4", MR_LOW},
{cipher_des, calg_des, 8, 8, type_block, 8, 8, 0, 0,
SEC_OID_DES_CBC, "DES-CBC", MR_LOW},
{cipher_3des, calg_3des, 24,24, type_block, 8, 8, 0, 0,
SEC_OID_DES_EDE3_CBC, "3DES-EDE-CBC", MR_LOW},
{cipher_aes_128, calg_aes, 16,16, type_block, 16,16, 0, 0,
SEC_OID_AES_128_CBC, "AES-128", MR_128},
{cipher_aes_256, calg_aes, 32,32, type_block, 16,16, 0, 0,
SEC_OID_AES_256_CBC, "AES-256", MR_128},
{cipher_camellia_128, calg_camellia, 16,16, type_block, 16,16, 0, 0,
SEC_OID_CAMELLIA_128_CBC, "Camellia-128", MR_128},
{cipher_camellia_256, calg_camellia, 32,32, type_block, 16,16, 0, 0,
SEC_OID_CAMELLIA_256_CBC, "Camellia-256", MR_128},
{cipher_seed, calg_seed, 16,16, type_block, 16,16, 0, 0,
SEC_OID_SEED_CBC, "SEED-CBC", MR_128},
{cipher_aes_128_gcm, calg_aes_gcm, 16,16, type_aead, 4, 0,16, 8,
SEC_OID_AES_128_GCM, "AES-128-GCM", MR_128},
{cipher_aes_256_gcm, calg_aes_gcm, 32,32, type_aead, 4, 0,16, 8,
SEC_OID_AES_256_GCM, "AES-256-GCM", MR_128},
{cipher_chacha20, calg_chacha20, 32,32, type_aead, 12, 0,16, 0,
SEC_OID_CHACHA20_POLY1305, "ChaCha20-Poly1305", MR_MAX},
{cipher_missing, calg_null, 0, 0, type_stream, 0, 0, 0, 0,
SEC_OID_UNKNOWN, "missing", 0U},
};
static const ssl3KEADef kea_defs[] =
{ /* indexed by SSL3KeyExchangeAlgorithm */
/* kea exchKeyType signKeyType authKeyType ephemeral oid */
{kea_null, ssl_kea_null, nullKey, ssl_auth_null, PR_FALSE, 0},
{kea_rsa, ssl_kea_rsa, nullKey, ssl_auth_rsa_decrypt, PR_FALSE, SEC_OID_TLS_RSA},
{kea_dh_dss, ssl_kea_dh, dsaKey, ssl_auth_dsa, PR_FALSE, SEC_OID_TLS_DH_DSS},
{kea_dh_rsa, ssl_kea_dh, rsaKey, ssl_auth_rsa_sign, PR_FALSE, SEC_OID_TLS_DH_RSA},
{kea_dhe_dss, ssl_kea_dh, dsaKey, ssl_auth_dsa, PR_TRUE, SEC_OID_TLS_DHE_DSS},
{kea_dhe_rsa, ssl_kea_dh, rsaKey, ssl_auth_rsa_sign, PR_TRUE, SEC_OID_TLS_DHE_RSA},
{kea_dh_anon, ssl_kea_dh, nullKey, ssl_auth_null, PR_TRUE, SEC_OID_TLS_DH_ANON},
{kea_ecdh_ecdsa, ssl_kea_ecdh, nullKey, ssl_auth_ecdh_ecdsa, PR_FALSE, SEC_OID_TLS_ECDH_ECDSA},
{kea_ecdhe_ecdsa, ssl_kea_ecdh, ecKey, ssl_auth_ecdsa, PR_TRUE, SEC_OID_TLS_ECDHE_ECDSA},
{kea_ecdh_rsa, ssl_kea_ecdh, nullKey, ssl_auth_ecdh_rsa, PR_FALSE, SEC_OID_TLS_ECDH_RSA},
{kea_ecdhe_rsa, ssl_kea_ecdh, rsaKey, ssl_auth_rsa_sign, PR_TRUE, SEC_OID_TLS_ECDHE_RSA},
{kea_ecdh_anon, ssl_kea_ecdh, nullKey, ssl_auth_null, PR_TRUE, SEC_OID_TLS_ECDH_ANON},
{kea_ecdhe_psk, ssl_kea_ecdh_psk, nullKey, ssl_auth_psk, PR_TRUE, SEC_OID_TLS_ECDHE_PSK},
{kea_dhe_psk, ssl_kea_dh_psk, nullKey, ssl_auth_psk, PR_TRUE, SEC_OID_TLS_DHE_PSK},
{kea_tls13_any, ssl_kea_tls13_any, nullKey, ssl_auth_tls13_any, PR_TRUE, SEC_OID_TLS13_KEA_ANY},
};
/* must use ssl_LookupCipherSuiteDef to access */
static const ssl3CipherSuiteDef cipher_suite_defs[] =
{
/* cipher_suite bulk_cipher_alg mac_alg key_exchange_alg prf_hash */
/* Note that the prf_hash_alg is the hash function used by the PRF, see sslimpl.h. */
{TLS_NULL_WITH_NULL_NULL, cipher_null, mac_null, kea_null, ssl_hash_none},
{TLS_RSA_WITH_NULL_MD5, cipher_null, mac_md5, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_NULL_SHA, cipher_null, mac_sha, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_NULL_SHA256, cipher_null, hmac_sha256, kea_rsa, ssl_hash_sha256},
{TLS_RSA_WITH_RC4_128_MD5, cipher_rc4, mac_md5, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_RC4_128_SHA, cipher_rc4, mac_sha, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_DES_CBC_SHA, cipher_des, mac_sha, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_3DES_EDE_CBC_SHA, cipher_3des, mac_sha, kea_rsa, ssl_hash_none},
{TLS_DHE_DSS_WITH_DES_CBC_SHA, cipher_des, mac_sha, kea_dhe_dss, ssl_hash_none},
{TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
cipher_3des, mac_sha, kea_dhe_dss, ssl_hash_none},
{TLS_DHE_DSS_WITH_RC4_128_SHA, cipher_rc4, mac_sha, kea_dhe_dss, ssl_hash_none},
{TLS_DHE_RSA_WITH_DES_CBC_SHA, cipher_des, mac_sha, kea_dhe_rsa, ssl_hash_none},
{TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
cipher_3des, mac_sha, kea_dhe_rsa, ssl_hash_none},
/* New TLS cipher suites */
{TLS_RSA_WITH_AES_128_CBC_SHA, cipher_aes_128, mac_sha, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_AES_128_CBC_SHA256, cipher_aes_128, hmac_sha256, kea_rsa, ssl_hash_sha256},
{TLS_DHE_DSS_WITH_AES_128_CBC_SHA, cipher_aes_128, mac_sha, kea_dhe_dss, ssl_hash_none},
{TLS_DHE_RSA_WITH_AES_128_CBC_SHA, cipher_aes_128, mac_sha, kea_dhe_rsa, ssl_hash_none},
{TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, cipher_aes_128, hmac_sha256, kea_dhe_rsa, ssl_hash_sha256},
{TLS_RSA_WITH_AES_256_CBC_SHA, cipher_aes_256, mac_sha, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_AES_256_CBC_SHA256, cipher_aes_256, hmac_sha256, kea_rsa, ssl_hash_sha256},
{TLS_DHE_DSS_WITH_AES_256_CBC_SHA, cipher_aes_256, mac_sha, kea_dhe_dss, ssl_hash_none},
{TLS_DHE_RSA_WITH_AES_256_CBC_SHA, cipher_aes_256, mac_sha, kea_dhe_rsa, ssl_hash_none},
{TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, cipher_aes_256, hmac_sha256, kea_dhe_rsa, ssl_hash_sha256},
{TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, cipher_aes_256_gcm, mac_aead, kea_dhe_rsa, ssl_hash_sha384},
{TLS_RSA_WITH_SEED_CBC_SHA, cipher_seed, mac_sha, kea_rsa, ssl_hash_none},
{TLS_RSA_WITH_CAMELLIA_128_CBC_SHA, cipher_camellia_128, mac_sha, kea_rsa, ssl_hash_none},
{TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA,
cipher_camellia_128, mac_sha, kea_dhe_dss, ssl_hash_none},
{TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA,
cipher_camellia_128, mac_sha, kea_dhe_rsa, ssl_hash_none},
{TLS_RSA_WITH_CAMELLIA_256_CBC_SHA, cipher_camellia_256, mac_sha, kea_rsa, ssl_hash_none},
{TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA,
cipher_camellia_256, mac_sha, kea_dhe_dss, ssl_hash_none},
{TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA,
cipher_camellia_256, mac_sha, kea_dhe_rsa, ssl_hash_none},
{TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, cipher_aes_128_gcm, mac_aead, kea_dhe_rsa, ssl_hash_sha256},
{TLS_RSA_WITH_AES_128_GCM_SHA256, cipher_aes_128_gcm, mac_aead, kea_rsa, ssl_hash_sha256},
{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, cipher_aes_128_gcm, mac_aead, kea_ecdhe_rsa, ssl_hash_sha256},
{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, cipher_aes_128_gcm, mac_aead, kea_ecdhe_ecdsa, ssl_hash_sha256},
{TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, cipher_aes_256_gcm, mac_aead, kea_ecdhe_ecdsa, ssl_hash_sha384},
{TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, cipher_aes_256_gcm, mac_aead, kea_ecdhe_rsa, ssl_hash_sha384},
{TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, cipher_aes_256, hmac_sha384, kea_ecdhe_ecdsa, ssl_hash_sha384},
{TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, cipher_aes_256, hmac_sha384, kea_ecdhe_rsa, ssl_hash_sha384},
{TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, cipher_aes_128_gcm, mac_aead, kea_dhe_dss, ssl_hash_sha256},
{TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, cipher_aes_128, hmac_sha256, kea_dhe_dss, ssl_hash_sha256},
{TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, cipher_aes_256, hmac_sha256, kea_dhe_dss, ssl_hash_sha256},
{TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, cipher_aes_256_gcm, mac_aead, kea_dhe_dss, ssl_hash_sha384},
{TLS_RSA_WITH_AES_256_GCM_SHA384, cipher_aes_256_gcm, mac_aead, kea_rsa, ssl_hash_sha384},
{TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256, cipher_chacha20, mac_aead, kea_dhe_rsa, ssl_hash_sha256},
{TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, cipher_chacha20, mac_aead, kea_ecdhe_rsa, ssl_hash_sha256},
{TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, cipher_chacha20, mac_aead, kea_ecdhe_ecdsa, ssl_hash_sha256},
{TLS_ECDH_ECDSA_WITH_NULL_SHA, cipher_null, mac_sha, kea_ecdh_ecdsa, ssl_hash_none},
{TLS_ECDH_ECDSA_WITH_RC4_128_SHA, cipher_rc4, mac_sha, kea_ecdh_ecdsa, ssl_hash_none},
{TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, cipher_3des, mac_sha, kea_ecdh_ecdsa, ssl_hash_none},
{TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, cipher_aes_128, mac_sha, kea_ecdh_ecdsa, ssl_hash_none},
{TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, cipher_aes_256, mac_sha, kea_ecdh_ecdsa, ssl_hash_none},
{TLS_ECDHE_ECDSA_WITH_NULL_SHA, cipher_null, mac_sha, kea_ecdhe_ecdsa, ssl_hash_none},
{TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, cipher_rc4, mac_sha, kea_ecdhe_ecdsa, ssl_hash_none},
{TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, cipher_3des, mac_sha, kea_ecdhe_ecdsa, ssl_hash_none},
{TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, cipher_aes_128, mac_sha, kea_ecdhe_ecdsa, ssl_hash_none},
{TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, cipher_aes_128, hmac_sha256, kea_ecdhe_ecdsa, ssl_hash_sha256},
{TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, cipher_aes_256, mac_sha, kea_ecdhe_ecdsa, ssl_hash_none},
{TLS_ECDH_RSA_WITH_NULL_SHA, cipher_null, mac_sha, kea_ecdh_rsa, ssl_hash_none},
{TLS_ECDH_RSA_WITH_RC4_128_SHA, cipher_rc4, mac_sha, kea_ecdh_rsa, ssl_hash_none},
{TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, cipher_3des, mac_sha, kea_ecdh_rsa, ssl_hash_none},
{TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, cipher_aes_128, mac_sha, kea_ecdh_rsa, ssl_hash_none},
{TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, cipher_aes_256, mac_sha, kea_ecdh_rsa, ssl_hash_none},
{TLS_ECDHE_RSA_WITH_NULL_SHA, cipher_null, mac_sha, kea_ecdhe_rsa, ssl_hash_none},
{TLS_ECDHE_RSA_WITH_RC4_128_SHA, cipher_rc4, mac_sha, kea_ecdhe_rsa, ssl_hash_none},
{TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, cipher_3des, mac_sha, kea_ecdhe_rsa, ssl_hash_none},
{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, cipher_aes_128, mac_sha, kea_ecdhe_rsa, ssl_hash_none},
{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, cipher_aes_128, hmac_sha256, kea_ecdhe_rsa, ssl_hash_sha256},
{TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, cipher_aes_256, mac_sha, kea_ecdhe_rsa, ssl_hash_none},
{TLS_AES_128_GCM_SHA256, cipher_aes_128_gcm, mac_aead, kea_tls13_any, ssl_hash_sha256},
{TLS_CHACHA20_POLY1305_SHA256, cipher_chacha20, mac_aead, kea_tls13_any, ssl_hash_sha256},
{TLS_AES_256_GCM_SHA384, cipher_aes_256_gcm, mac_aead, kea_tls13_any, ssl_hash_sha384},
};
/* clang-format on */
static const CK_MECHANISM_TYPE auth_alg_defs[] = {
CKM_INVALID_MECHANISM, /* ssl_auth_null */
CKM_RSA_PKCS, /* ssl_auth_rsa_decrypt */
CKM_DSA, /* ? _SHA1 */ /* ssl_auth_dsa */
CKM_INVALID_MECHANISM, /* ssl_auth_kea (unused) */
CKM_ECDSA, /* ssl_auth_ecdsa */
CKM_ECDH1_DERIVE, /* ssl_auth_ecdh_rsa */
CKM_ECDH1_DERIVE, /* ssl_auth_ecdh_ecdsa */
CKM_RSA_PKCS, /* ssl_auth_rsa_sign */
CKM_RSA_PKCS_PSS, /* ssl_auth_rsa_pss */
CKM_NSS_HKDF_SHA256, /* ssl_auth_psk (just check for HKDF) */
CKM_INVALID_MECHANISM /* ssl_auth_tls13_any */
};
PR_STATIC_ASSERT(PR_ARRAY_SIZE(auth_alg_defs) == ssl_auth_size);
static const CK_MECHANISM_TYPE kea_alg_defs[] = {
CKM_INVALID_MECHANISM, /* ssl_kea_null */
CKM_RSA_PKCS, /* ssl_kea_rsa */
CKM_DH_PKCS_DERIVE, /* ssl_kea_dh */
CKM_INVALID_MECHANISM, /* ssl_kea_fortezza (unused) */
CKM_ECDH1_DERIVE, /* ssl_kea_ecdh */
CKM_ECDH1_DERIVE, /* ssl_kea_ecdh_psk */
CKM_DH_PKCS_DERIVE, /* ssl_kea_dh_psk */
CKM_INVALID_MECHANISM, /* ssl_kea_tls13_any */
};
PR_STATIC_ASSERT(PR_ARRAY_SIZE(kea_alg_defs) == ssl_kea_size);
typedef struct SSLCipher2MechStr {
SSLCipherAlgorithm calg;
CK_MECHANISM_TYPE cmech;
} SSLCipher2Mech;
/* indexed by type SSLCipherAlgorithm */
static const SSLCipher2Mech alg2Mech[] = {
/* calg, cmech */
{ calg_null, (CK_MECHANISM_TYPE)0x80000000L },
{ calg_rc4, CKM_RC4 },
{ calg_rc2, CKM_RC2_CBC },
{ calg_des, CKM_DES_CBC },
{ calg_3des, CKM_DES3_CBC },
{ calg_idea, CKM_IDEA_CBC },
{ calg_fortezza, CKM_SKIPJACK_CBC64 },
{ calg_aes, CKM_AES_CBC },
{ calg_camellia, CKM_CAMELLIA_CBC },
{ calg_seed, CKM_SEED_CBC },
{ calg_aes_gcm, CKM_AES_GCM },
{ calg_chacha20, CKM_NSS_CHACHA20_POLY1305 },
/* { calg_init , (CK_MECHANISM_TYPE)0x7fffffffL } */
};
#define mmech_invalid (CK_MECHANISM_TYPE)0x80000000L
#define mmech_md5 CKM_SSL3_MD5_MAC
#define mmech_sha CKM_SSL3_SHA1_MAC
#define mmech_md5_hmac CKM_MD5_HMAC
#define mmech_sha_hmac CKM_SHA_1_HMAC
#define mmech_sha256_hmac CKM_SHA256_HMAC
#define mmech_sha384_hmac CKM_SHA384_HMAC
/* clang-format off */
static const ssl3MACDef mac_defs[] = { /* indexed by SSL3MACAlgorithm */
/* pad_size is only used for SSL 3.0 MAC. See RFC 6101 Sec. 5.2.3.1. */
/* mac mmech pad_size mac_size */
{ mac_null, mmech_invalid, 0, 0 , 0},
{ mac_md5, mmech_md5, 48, MD5_LENGTH, SEC_OID_HMAC_MD5 },
{ mac_sha, mmech_sha, 40, SHA1_LENGTH, SEC_OID_HMAC_SHA1},
{hmac_md5, mmech_md5_hmac, 0, MD5_LENGTH, SEC_OID_HMAC_MD5},
{hmac_sha, mmech_sha_hmac, 0, SHA1_LENGTH, SEC_OID_HMAC_SHA1},
{hmac_sha256, mmech_sha256_hmac, 0, SHA256_LENGTH, SEC_OID_HMAC_SHA256},
{ mac_aead, mmech_invalid, 0, 0, 0 },
{hmac_sha384, mmech_sha384_hmac, 0, SHA384_LENGTH, SEC_OID_HMAC_SHA384}
};
/* clang-format on */
const PRUint8 tls13_downgrade_random[] = { 0x44, 0x4F, 0x57, 0x4E,
0x47, 0x52, 0x44, 0x01 };
const PRUint8 tls12_downgrade_random[] = { 0x44, 0x4F, 0x57, 0x4E,
0x47, 0x52, 0x44, 0x00 };
PR_STATIC_ASSERT(sizeof(tls13_downgrade_random) ==
sizeof(tls13_downgrade_random));
/* The ECCWrappedKeyInfo structure defines how various pieces of
* information are laid out within wrappedSymmetricWrappingkey
* for ECDH key exchange. Since wrappedSymmetricWrappingkey is
* a 512-byte buffer (see sslimpl.h), the variable length field
* in ECCWrappedKeyInfo can be at most (512 - 8) = 504 bytes.
*
* XXX For now, NSS only supports named elliptic curves of size 571 bits
* or smaller. The public value will fit within 145 bytes and EC params
* will fit within 12 bytes. We'll need to revisit this when NSS
* supports arbitrary curves.
*/
#define MAX_EC_WRAPPED_KEY_BUFLEN 504
typedef struct ECCWrappedKeyInfoStr {
PRUint16 size; /* EC public key size in bits */
PRUint16 encodedParamLen; /* length (in bytes) of DER encoded EC params */
PRUint16 pubValueLen; /* length (in bytes) of EC public value */
PRUint16 wrappedKeyLen; /* length (in bytes) of the wrapped key */
PRUint8 var[MAX_EC_WRAPPED_KEY_BUFLEN]; /* this buffer contains the */
/* EC public-key params, the EC public value and the wrapped key */
} ECCWrappedKeyInfo;
CK_MECHANISM_TYPE
ssl3_Alg2Mech(SSLCipherAlgorithm calg)
{
PORT_Assert(alg2Mech[calg].calg == calg);
return alg2Mech[calg].cmech;
}
#if defined(TRACE)
static char *
ssl3_DecodeHandshakeType(int msgType)
{
char *rv;
static char line[40];
switch (msgType) {
case ssl_hs_hello_request:
rv = "hello_request (0)";
break;
case ssl_hs_client_hello:
rv = "client_hello (1)";
break;
case ssl_hs_server_hello:
rv = "server_hello (2)";
break;
case ssl_hs_hello_verify_request:
rv = "hello_verify_request (3)";
break;
case ssl_hs_new_session_ticket:
rv = "session_ticket (4)";
break;
case ssl_hs_end_of_early_data:
rv = "end_of_early_data (5)";
break;
case ssl_hs_hello_retry_request:
rv = "hello_retry_request (6)";
break;
case ssl_hs_encrypted_extensions:
rv = "encrypted_extensions (8)";
break;
case ssl_hs_certificate:
rv = "certificate (11)";
break;
case ssl_hs_server_key_exchange:
rv = "server_key_exchange (12)";
break;
case ssl_hs_certificate_request:
rv = "certificate_request (13)";
break;
case ssl_hs_server_hello_done:
rv = "server_hello_done (14)";
break;
case ssl_hs_certificate_verify:
rv = "certificate_verify (15)";
break;
case ssl_hs_client_key_exchange:
rv = "client_key_exchange (16)";
break;
case ssl_hs_finished:
rv = "finished (20)";
break;
default:
sprintf(line, "*UNKNOWN* handshake type! (%d)", msgType);
rv = line;
}
return rv;
}
static char *
ssl3_DecodeContentType(int msgType)
{
char *rv;
static char line[40];
switch (msgType) {
case content_change_cipher_spec:
rv = "change_cipher_spec (20)";
break;
case content_alert:
rv = "alert (21)";
break;
case content_handshake:
rv = "handshake (22)";
break;
case content_application_data:
rv = "application_data (23)";
break;
default:
sprintf(line, "*UNKNOWN* record type! (%d)", msgType);
rv = line;
}
return rv;
}
#endif
SSL3Statistics *
SSL_GetStatistics(void)
{
return &ssl3stats;
}
typedef struct tooLongStr {
#if defined(IS_LITTLE_ENDIAN)
PRInt32 low;
PRInt32 high;
#else
PRInt32 high;
PRInt32 low;
#endif
} tooLong;
void
SSL_AtomicIncrementLong(long *x)
{
if ((sizeof *x) == sizeof(PRInt32)) {
PR_ATOMIC_INCREMENT((PRInt32 *)x);
} else {
tooLong *tl = (tooLong *)x;
if (PR_ATOMIC_INCREMENT(&tl->low) == 0)
PR_ATOMIC_INCREMENT(&tl->high);
}
}
static PRBool
ssl3_CipherSuiteAllowedForVersionRange(
ssl3CipherSuite cipherSuite,
const SSLVersionRange *vrange)
{
switch (cipherSuite) {
case TLS_DHE_RSA_WITH_AES_256_CBC_SHA256:
case TLS_RSA_WITH_AES_256_CBC_SHA256:
case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256:
case TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384:
case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:
case TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:
case TLS_DHE_RSA_WITH_AES_128_CBC_SHA256:
case TLS_RSA_WITH_AES_128_CBC_SHA256:
case TLS_RSA_WITH_AES_128_GCM_SHA256:
case TLS_RSA_WITH_AES_256_GCM_SHA384:
case TLS_DHE_DSS_WITH_AES_128_CBC_SHA256:
case TLS_DHE_DSS_WITH_AES_256_CBC_SHA256:
case TLS_RSA_WITH_NULL_SHA256:
case TLS_DHE_DSS_WITH_AES_128_GCM_SHA256:
case TLS_DHE_DSS_WITH_AES_256_GCM_SHA384:
case TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:
case TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384:
case TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:
case TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384:
case TLS_DHE_RSA_WITH_AES_128_GCM_SHA256:
case TLS_DHE_RSA_WITH_AES_256_GCM_SHA384:
case TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256:
case TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256:
case TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256:
return vrange->max >= SSL_LIBRARY_VERSION_TLS_1_2 &&
vrange->min < SSL_LIBRARY_VERSION_TLS_1_3;
/* RFC 4492: ECC cipher suites need TLS extensions to negotiate curves and
* point formats.*/
case TLS_ECDH_ECDSA_WITH_NULL_SHA:
case TLS_ECDH_ECDSA_WITH_RC4_128_SHA:
case TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA:
case TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA:
case TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA:
case TLS_ECDHE_ECDSA_WITH_NULL_SHA:
case TLS_ECDHE_ECDSA_WITH_RC4_128_SHA:
case TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA:
case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:
case TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:
case TLS_ECDH_RSA_WITH_NULL_SHA:
case TLS_ECDH_RSA_WITH_RC4_128_SHA:
case TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA:
case TLS_ECDH_RSA_WITH_AES_128_CBC_SHA:
case TLS_ECDH_RSA_WITH_AES_256_CBC_SHA:
case TLS_ECDHE_RSA_WITH_NULL_SHA:
case TLS_ECDHE_RSA_WITH_RC4_128_SHA:
case TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:
case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:
case TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:
return vrange->max >= SSL_LIBRARY_VERSION_TLS_1_0 &&
vrange->min < SSL_LIBRARY_VERSION_TLS_1_3;
case TLS_AES_128_GCM_SHA256:
case TLS_AES_256_GCM_SHA384:
case TLS_CHACHA20_POLY1305_SHA256:
return vrange->max >= SSL_LIBRARY_VERSION_TLS_1_3;
default:
return vrange->min < SSL_LIBRARY_VERSION_TLS_1_3;
}
}
/* return pointer to ssl3CipherSuiteDef for suite, or NULL */
/* XXX This does a linear search. A binary search would be better. */
const ssl3CipherSuiteDef *
ssl_LookupCipherSuiteDef(ssl3CipherSuite suite)
{
int cipher_suite_def_len =
sizeof(cipher_suite_defs) / sizeof(cipher_suite_defs[0]);
int i;
for (i = 0; i < cipher_suite_def_len; i++) {
if (cipher_suite_defs[i].cipher_suite == suite)
return &cipher_suite_defs[i];
}
PORT_Assert(PR_FALSE); /* We should never get here. */
PORT_SetError(SSL_ERROR_UNKNOWN_CIPHER_SUITE);
return NULL;
}
/* Find the cipher configuration struct associate with suite */
/* XXX This does a linear search. A binary search would be better. */
static ssl3CipherSuiteCfg *
ssl_LookupCipherSuiteCfgMutable(ssl3CipherSuite suite,
ssl3CipherSuiteCfg *suites)
{
int i;
for (i = 0; i < ssl_V3_SUITES_IMPLEMENTED; i++) {
if (suites[i].cipher_suite == suite)
return &suites[i];
}
/* return NULL and let the caller handle it. */
PORT_SetError(SSL_ERROR_UNKNOWN_CIPHER_SUITE);
return NULL;
}
const static ssl3CipherSuiteCfg *
ssl_LookupCipherSuiteCfg(ssl3CipherSuite suite, const ssl3CipherSuiteCfg *suites)
{
return ssl_LookupCipherSuiteCfgMutable(suite,
CONST_CAST(ssl3CipherSuiteCfg, suites));
}
static PRBool
ssl_NamedGroupTypeEnabled(const sslSocket *ss, SSLKEAType keaType)
{
unsigned int i;
for (i = 0; i < SSL_NAMED_GROUP_COUNT; ++i) {
if (ss->namedGroupPreferences[i] &&
ss->namedGroupPreferences[i]->keaType == keaType) {
return PR_TRUE;
}
}
return PR_FALSE;
}
static PRBool
ssl_KEAEnabled(const sslSocket *ss, SSLKEAType keaType)
{
switch (keaType) {
case ssl_kea_rsa:
return PR_TRUE;
case ssl_kea_dh:
case ssl_kea_dh_psk: {
if (ss->sec.isServer && !ss->opt.enableServerDhe) {
return PR_FALSE;
}
if (ss->sec.isServer) {
/* If the server requires named FFDHE groups, then the client
* must have included an FFDHE group. peerSupportsFfdheGroups
* is set to true in ssl_HandleSupportedGroupsXtn(). */
if (ss->opt.requireDHENamedGroups &&
!ss->xtnData.peerSupportsFfdheGroups) {
return PR_FALSE;
}
/* We can use the weak DH group if all of these are true:
* 1. We don't require named groups.
* 2. The peer doesn't support named groups.
* 3. This isn't TLS 1.3.
* 4. The weak group is enabled. */
if (!ss->opt.requireDHENamedGroups &&
!ss->xtnData.peerSupportsFfdheGroups &&
ss->version < SSL_LIBRARY_VERSION_TLS_1_3 &&
ss->ssl3.dheWeakGroupEnabled) {
return PR_TRUE;
}
} else {
if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3 &&
!ss->opt.requireDHENamedGroups) {
/* The client enables DHE cipher suites even if no DHE groups
* are enabled. Only if this isn't TLS 1.3 and named groups
* are not required. */
return PR_TRUE;
}
}
return ssl_NamedGroupTypeEnabled(ss, ssl_kea_dh);
}
case ssl_kea_ecdh:
case ssl_kea_ecdh_psk:
return ssl_NamedGroupTypeEnabled(ss, ssl_kea_ecdh);
case ssl_kea_tls13_any:
return PR_TRUE;
case ssl_kea_fortezza:
default:
PORT_Assert(0);
}
return PR_FALSE;
}
static PRBool
ssl_HasCert(const sslSocket *ss, SSLAuthType authType)
{
PRCList *cursor;
if (authType == ssl_auth_null || authType == ssl_auth_psk || authType == ssl_auth_tls13_any) {
return PR_TRUE;
}
for (cursor = PR_NEXT_LINK(&ss->serverCerts);
cursor != &ss->serverCerts;
cursor = PR_NEXT_LINK(cursor)) {
sslServerCert *cert = (sslServerCert *)cursor;
if (!cert->serverKeyPair ||
!cert->serverKeyPair->privKey ||
!cert->serverCertChain ||
!SSL_CERT_IS(cert, authType)) {
continue;
}
/* When called from ssl3_config_match_init(), all the EC curves will be
* enabled, so this will essentially do nothing (unless we implement
* curve configuration). However, once we have seen the
* supported_groups extension and this is called from config_match(),
* this will filter out certificates with an unsupported curve. */
if ((authType == ssl_auth_ecdsa ||
authType == ssl_auth_ecdh_ecdsa ||
authType == ssl_auth_ecdh_rsa) &&
!ssl_NamedGroupEnabled(ss, cert->namedCurve)) {
continue;
}
return PR_TRUE;
}
return PR_FALSE;
}
const ssl3BulkCipherDef *
ssl_GetBulkCipherDef(const ssl3CipherSuiteDef *cipher_def)
{
PORT_Assert(cipher_def->bulk_cipher_alg < PR_ARRAY_SIZE(bulk_cipher_defs));
PORT_Assert(bulk_cipher_defs[cipher_def->bulk_cipher_alg].cipher == cipher_def->bulk_cipher_alg);
return &bulk_cipher_defs[cipher_def->bulk_cipher_alg];
}
/* Initialize the suite->isPresent value for config_match
* Returns count of enabled ciphers supported by extant tokens,
* regardless of policy or user preference.
* If this returns zero, the user cannot do SSL v3.
*/
int
ssl3_config_match_init(sslSocket *ss)
{
ssl3CipherSuiteCfg *suite;
const ssl3CipherSuiteDef *cipher_def;
SSLCipherAlgorithm cipher_alg;
CK_MECHANISM_TYPE cipher_mech;
SSLAuthType authType;
SSLKEAType keaType;
int i;
int numPresent = 0;
int numEnabled = 0;
PORT_Assert(ss);
if (!ss) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return 0;
}
if (SSL_ALL_VERSIONS_DISABLED(&ss->vrange)) {
return 0;
}
for (i = 0; i < ssl_V3_SUITES_IMPLEMENTED; i++) {
suite = &ss->cipherSuites[i];
if (suite->enabled) {
++numEnabled;
/* We need the cipher defs to see if we have a token that can handle
* this cipher. It isn't part of the static definition.
*/
cipher_def = ssl_LookupCipherSuiteDef(suite->cipher_suite);
if (!cipher_def) {
suite->isPresent = PR_FALSE;
continue;
}
cipher_alg = ssl_GetBulkCipherDef(cipher_def)->calg;
cipher_mech = ssl3_Alg2Mech(cipher_alg);
/* Mark the suites that are backed by real tokens, certs and keys */
suite->isPresent = PR_TRUE;
authType = kea_defs[cipher_def->key_exchange_alg].authKeyType;
if (authType != ssl_auth_null && authType != ssl_auth_tls13_any) {
if (ss->sec.isServer && !ssl_HasCert(ss, authType)) {
suite->isPresent = PR_FALSE;
}
if (!PK11_TokenExists(auth_alg_defs[authType])) {
suite->isPresent = PR_FALSE;
}
}
keaType = kea_defs[cipher_def->key_exchange_alg].exchKeyType;
if (keaType != ssl_kea_null &&
keaType != ssl_kea_tls13_any &&
!PK11_TokenExists(kea_alg_defs[keaType])) {
suite->isPresent = PR_FALSE;
}
if (cipher_alg != calg_null &&
!PK11_TokenExists(cipher_mech)) {
suite->isPresent = PR_FALSE;
}
if (suite->isPresent) {
++numPresent;
}
}
}
PORT_Assert(numPresent > 0 || numEnabled == 0);
if (numPresent <= 0) {
PORT_SetError(SSL_ERROR_NO_CIPHERS_SUPPORTED);
}
return numPresent;
}
/* Return PR_TRUE if suite is usable. This if the suite is permitted by policy,
* enabled, has a certificate (as needed), has a viable key agreement method, is
* usable with the negotiated TLS version, and is otherwise usable. */
static PRBool
config_match(const ssl3CipherSuiteCfg *suite, int policy,
const SSLVersionRange *vrange, const sslSocket *ss)
{
const ssl3CipherSuiteDef *cipher_def;
const ssl3KEADef *kea_def;
PORT_Assert(policy != SSL_NOT_ALLOWED);
if (policy == SSL_NOT_ALLOWED)
return PR_FALSE;
if (!suite->enabled || !suite->isPresent)
return PR_FALSE;
if ((suite->policy == SSL_NOT_ALLOWED) ||
(suite->policy > policy))
return PR_FALSE;
PORT_Assert(ss != NULL);
cipher_def = ssl_LookupCipherSuiteDef(suite->cipher_suite);
PORT_Assert(cipher_def != NULL);
kea_def = &kea_defs[cipher_def->key_exchange_alg];
PORT_Assert(kea_def != NULL);
if (!ssl_KEAEnabled(ss, kea_def->exchKeyType)) {
return PR_FALSE;
}
if (ss->sec.isServer && !ssl_HasCert(ss, kea_def->authKeyType)) {
return PR_FALSE;
}