diff options
Diffstat (limited to 'security/nss/lib/ssl/sslspec.c')
| -rw-r--r-- | security/nss/lib/ssl/sslspec.c | 273 |
1 files changed, 0 insertions, 273 deletions
diff --git a/security/nss/lib/ssl/sslspec.c b/security/nss/lib/ssl/sslspec.c deleted file mode 100644 index 26c3eb546..000000000 --- a/security/nss/lib/ssl/sslspec.c +++ /dev/null @@ -1,273 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ -/* - * Handling of cipher specs. - * - * 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/. */ - -#include "ssl.h" -#include "sslproto.h" -#include "pk11func.h" -#include "secitem.h" - -#include "sslimpl.h" - -/* 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 ssl_bulk_cipher_defs[] = { - /* |--------- Lengths ---------| */ - /* cipher calg : s : */ - /* : e b n */ - /* oid short_name mr : c l o */ - /* k r o t n */ - /* e e i c a c */ - /* y t type v k g e */ - {cipher_null, ssl_calg_null, 0, 0, type_stream, 0, 0, 0, 0, - SEC_OID_NULL_CIPHER, "NULL", MR_MAX}, - {cipher_rc4, ssl_calg_rc4, 16,16, type_stream, 0, 0, 0, 0, - SEC_OID_RC4, "RC4", MR_LOW}, - {cipher_des, ssl_calg_des, 8, 8, type_block, 8, 8, 0, 0, - SEC_OID_DES_CBC, "DES-CBC", MR_LOW}, - {cipher_3des, ssl_calg_3des, 24,24, type_block, 8, 8, 0, 0, - SEC_OID_DES_EDE3_CBC, "3DES-EDE-CBC", MR_LOW}, - {cipher_aes_128, ssl_calg_aes, 16,16, type_block, 16,16, 0, 0, - SEC_OID_AES_128_CBC, "AES-128", MR_128}, - {cipher_aes_256, ssl_calg_aes, 32,32, type_block, 16,16, 0, 0, - SEC_OID_AES_256_CBC, "AES-256", MR_128}, - {cipher_camellia_128, ssl_calg_camellia, 16,16, type_block, 16,16, 0, 0, - SEC_OID_CAMELLIA_128_CBC, "Camellia-128", MR_128}, - {cipher_camellia_256, ssl_calg_camellia, 32,32, type_block, 16,16, 0, 0, - SEC_OID_CAMELLIA_256_CBC, "Camellia-256", MR_128}, - {cipher_seed, ssl_calg_seed, 16,16, type_block, 16,16, 0, 0, - SEC_OID_SEED_CBC, "SEED-CBC", MR_128}, - {cipher_aes_128_gcm, ssl_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, ssl_calg_aes_gcm, 32,32, type_aead, 4, 0,16, 8, - SEC_OID_AES_256_GCM, "AES-256-GCM", MR_128}, - {cipher_chacha20, ssl_calg_chacha20, 32,32, type_aead, 12, 0,16, 0, - SEC_OID_CHACHA20_POLY1305, "ChaCha20-Poly1305", MR_MAX}, - {cipher_missing, ssl_calg_null, 0, 0, type_stream, 0, 0, 0, 0, - SEC_OID_UNKNOWN, "missing", 0U}, -}; -/* clang-format on */ - -const ssl3BulkCipherDef * -ssl_GetBulkCipherDef(const ssl3CipherSuiteDef *suiteDef) -{ - SSL3BulkCipher bulkCipher = suiteDef->bulk_cipher_alg; - PORT_Assert(bulkCipher < PR_ARRAY_SIZE(ssl_bulk_cipher_defs)); - PORT_Assert(ssl_bulk_cipher_defs[bulkCipher].cipher == bulkCipher); - return &ssl_bulk_cipher_defs[bulkCipher]; -} - -/* indexed by SSL3MACAlgorithm */ -static const ssl3MACDef ssl_mac_defs[] = { - /* pad_size is only used for SSL 3.0 MAC. See RFC 6101 Sec. 5.2.3.1. */ - /* mac mmech pad_size mac_size */ - { ssl_mac_null, CKM_INVALID_MECHANISM, 0, 0, 0 }, - { ssl_mac_md5, CKM_SSL3_MD5_MAC, 48, MD5_LENGTH, SEC_OID_HMAC_MD5 }, - { ssl_mac_sha, CKM_SSL3_SHA1_MAC, 40, SHA1_LENGTH, SEC_OID_HMAC_SHA1 }, - { ssl_hmac_md5, CKM_MD5_HMAC, 0, MD5_LENGTH, SEC_OID_HMAC_MD5 }, - { ssl_hmac_sha, CKM_SHA_1_HMAC, 0, SHA1_LENGTH, SEC_OID_HMAC_SHA1 }, - { ssl_hmac_sha256, CKM_SHA256_HMAC, 0, SHA256_LENGTH, SEC_OID_HMAC_SHA256 }, - { ssl_mac_aead, CKM_INVALID_MECHANISM, 0, 0, 0 }, - { ssl_hmac_sha384, CKM_SHA384_HMAC, 0, SHA384_LENGTH, SEC_OID_HMAC_SHA384 } -}; - -const ssl3MACDef * -ssl_GetMacDefByAlg(SSL3MACAlgorithm mac) -{ - /* Cast here for clang: https://bugs.llvm.org/show_bug.cgi?id=16154 */ - PORT_Assert((size_t)mac < PR_ARRAY_SIZE(ssl_mac_defs)); - PORT_Assert(ssl_mac_defs[mac].mac == mac); - return &ssl_mac_defs[mac]; -} - -const ssl3MACDef * -ssl_GetMacDef(const sslSocket *ss, const ssl3CipherSuiteDef *suiteDef) -{ - SSL3MACAlgorithm mac = suiteDef->mac_alg; - if (ss->version > SSL_LIBRARY_VERSION_3_0) { - switch (mac) { - case ssl_mac_md5: - mac = ssl_hmac_md5; - break; - case ssl_mac_sha: - mac = ssl_hmac_sha; - break; - default: - break; - } - } - return ssl_GetMacDefByAlg(mac); -} - -ssl3CipherSpec * -ssl_FindCipherSpecByEpoch(sslSocket *ss, CipherSpecDirection direction, - DTLSEpoch epoch) -{ - PRCList *cur_p; - for (cur_p = PR_LIST_HEAD(&ss->ssl3.hs.cipherSpecs); - cur_p != &ss->ssl3.hs.cipherSpecs; - cur_p = PR_NEXT_LINK(cur_p)) { - ssl3CipherSpec *spec = (ssl3CipherSpec *)cur_p; - - if (spec->epoch != epoch) { - continue; - } - if (direction != spec->direction) { - continue; - } - return spec; - } - return NULL; -} - -ssl3CipherSpec * -ssl_CreateCipherSpec(sslSocket *ss, CipherSpecDirection direction) -{ - ssl3CipherSpec *spec = PORT_ZNew(ssl3CipherSpec); - if (!spec) { - return NULL; - } - spec->refCt = 1; - spec->version = ss->version; - spec->direction = direction; - SSL_TRC(10, ("%d: SSL[%d]: new %s spec %d ct=%d", - SSL_GETPID(), ss->fd, SPEC_DIR(spec), spec, - spec->refCt)); - return spec; -} - -void -ssl_SaveCipherSpec(sslSocket *ss, ssl3CipherSpec *spec) -{ - PR_APPEND_LINK(&spec->link, &ss->ssl3.hs.cipherSpecs); -} - -/* Called from ssl3_InitState. */ -/* Caller must hold the SpecWriteLock. */ -SECStatus -ssl_SetupNullCipherSpec(sslSocket *ss, CipherSpecDirection dir) -{ - ssl3CipherSpec *spec; - - PORT_Assert(ss->opt.noLocks || ssl_HaveSpecWriteLock(ss)); - - spec = ssl_CreateCipherSpec(ss, dir); - if (!spec) { - return SECFailure; - } - - /* Set default versions. This value will be used to generate and send - * alerts if a version is not negotiated. These values are overridden when - * sending a ClientHello and when a version is negotiated. */ - spec->version = SSL_LIBRARY_VERSION_TLS_1_0; - spec->recordVersion = IS_DTLS(ss) - ? SSL_LIBRARY_VERSION_DTLS_1_0_WIRE - : SSL_LIBRARY_VERSION_TLS_1_0; - spec->cipherDef = &ssl_bulk_cipher_defs[cipher_null]; - PORT_Assert(spec->cipherDef->cipher == cipher_null); - spec->macDef = &ssl_mac_defs[ssl_mac_null]; - PORT_Assert(spec->macDef->mac == ssl_mac_null); - spec->cipher = Null_Cipher; - - spec->phase = "cleartext"; - dtls_InitRecvdRecords(&spec->recvdRecords); - - ssl_SaveCipherSpec(ss, spec); - if (dir == CipherSpecRead) { - ss->ssl3.crSpec = spec; - } else { - ss->ssl3.cwSpec = spec; - } - return SECSuccess; -} - -void -ssl_CipherSpecAddRef(ssl3CipherSpec *spec) -{ - ++spec->refCt; - SSL_TRC(10, ("%d: SSL[-]: Increment ref ct for %s spec %d. new ct = %d", - SSL_GETPID(), SPEC_DIR(spec), spec, spec->refCt)); -} - -static void -ssl_DestroyKeyMaterial(ssl3KeyMaterial *keyMaterial) -{ - PK11_FreeSymKey(keyMaterial->key); - PK11_FreeSymKey(keyMaterial->macKey); - if (keyMaterial->macContext != NULL) { - PK11_DestroyContext(keyMaterial->macContext, PR_TRUE); - } -} - -static void -ssl_FreeCipherSpec(ssl3CipherSpec *spec) -{ - SSL_TRC(10, ("%d: SSL[-]: Freeing %s spec %d. epoch=%d", - SSL_GETPID(), SPEC_DIR(spec), spec, spec->epoch)); - - PR_REMOVE_LINK(&spec->link); - - /* PORT_Assert( ss->opt.noLocks || ssl_HaveSpecWriteLock(ss)); Don't have ss! */ - if (spec->cipherContext) { - PK11_DestroyContext(spec->cipherContext, PR_TRUE); - } - PK11_FreeSymKey(spec->masterSecret); - ssl_DestroyKeyMaterial(&spec->keyMaterial); - - PORT_ZFree(spec, sizeof(*spec)); -} - -/* This function is never called on a spec which is on the - * cipherSpecs list. */ -void -ssl_CipherSpecRelease(ssl3CipherSpec *spec) -{ - if (!spec) { - return; - } - - PORT_Assert(spec->refCt > 0); - --spec->refCt; - SSL_TRC(10, ("%d: SSL[-]: decrement refct for %s spec %d. epoch=%d new ct = %d", - SSL_GETPID(), SPEC_DIR(spec), spec, spec->epoch, spec->refCt)); - if (!spec->refCt) { - ssl_FreeCipherSpec(spec); - } -} - -void -ssl_DestroyCipherSpecs(PRCList *list) -{ - while (!PR_CLIST_IS_EMPTY(list)) { - ssl3CipherSpec *spec = (ssl3CipherSpec *)PR_LIST_TAIL(list); - ssl_FreeCipherSpec(spec); - } -} - -void -ssl_CipherSpecReleaseByEpoch(sslSocket *ss, CipherSpecDirection dir, - DTLSEpoch epoch) -{ - ssl3CipherSpec *spec; - SSL_TRC(10, ("%d: SSL[%d]: releasing %s cipher spec for epoch %d", - SSL_GETPID(), ss->fd, - (dir == CipherSpecRead) ? "read" : "write", epoch)); - - spec = ssl_FindCipherSpecByEpoch(ss, dir, epoch); - if (spec) { - ssl_CipherSpecRelease(spec); - } -} |