/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2010 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * The system call and DDI interface for the kernel SSL module */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "kssl.h" #include "ksslimpl.h" /* * DDI entry points. */ static int kssl_attach(dev_info_t *, ddi_attach_cmd_t); static int kssl_detach(dev_info_t *, ddi_detach_cmd_t); static int kssl_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); static int kssl_open(dev_t *, int, int, cred_t *); static int kssl_close(dev_t, int, int, cred_t *); static int kssl_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); static int kssl_constructor(void *buf, void *arg, int kmflags); static void kssl_destructor(void *buf, void *arg); /* * Module linkage. */ static struct cb_ops cbops = { kssl_open, /* cb_open */ kssl_close, /* cb_close */ nodev, /* cb_strategy */ nodev, /* cb_print */ nodev, /* cb_dump */ nodev, /* cb_read */ nodev, /* cb_write */ kssl_ioctl, /* cb_ioctl */ nodev, /* cb_devmap */ nodev, /* cb_mmap */ nodev, /* cb_segmap */ nochpoll, /* cb_chpoll */ ddi_prop_op, /* cb_prop_op */ NULL, /* cb_streamtab */ D_MP, /* cb_flag */ CB_REV, /* cb_rev */ nodev, /* cb_aread */ nodev, /* cb_awrite */ }; static struct dev_ops devops = { DEVO_REV, /* devo_rev */ 0, /* devo_refcnt */ kssl_getinfo, /* devo_getinfo */ nulldev, /* devo_identify */ nulldev, /* devo_probe */ kssl_attach, /* devo_attach */ kssl_detach, /* devo_detach */ nodev, /* devo_reset */ &cbops, /* devo_cb_ops */ NULL, /* devo_bus_ops */ NULL, /* devo_power */ ddi_quiesce_not_needed, /* devo_quiesce */ }; static struct modldrv modldrv = { &mod_driverops, /* drv_modops */ "Kernel SSL Interface", /* drv_linkinfo */ &devops, }; static struct modlinkage modlinkage = { MODREV_1, /* ml_rev */ &modldrv, /* ml_linkage */ NULL }; static dev_info_t *kssl_dip = NULL; crypto_mechanism_t rsa_x509_mech = {CRYPTO_MECH_INVALID, NULL, 0}; crypto_mechanism_t hmac_md5_mech = {CRYPTO_MECH_INVALID, NULL, 0}; crypto_mechanism_t hmac_sha1_mech = {CRYPTO_MECH_INVALID, NULL, 0}; crypto_call_flag_t kssl_call_flag = CRYPTO_ALWAYS_QUEUE; KSSLCipherDef cipher_defs[] = { /* indexed by SSL3BulkCipher */ /* type bsize keysz crypto_mech_type_t */ {type_stream, 0, 0, CRYPTO_MECH_INVALID}, /* mech_type to be initialized with CKM_RC4's */ {type_stream, 0, 16, CRYPTO_MECH_INVALID}, /* mech_type to be initialized with CKM_DES_CBC's */ {type_block, 8, 8, CRYPTO_MECH_INVALID}, /* mech_type to be initialized with CKM_DES3_CBC's */ {type_block, 8, 24, CRYPTO_MECH_INVALID}, /* mech_type to be initialized with CKM_AES_CBC with 128-bit key */ {type_block, 16, 16, CRYPTO_MECH_INVALID}, /* mech_type to be initialized with CKM_AES_CBC with 256-bit key */ {type_block, 16, 32, CRYPTO_MECH_INVALID}, }; struct kmem_cache *kssl_cache; static void kssl_global_init(); static void kssl_init_mechs(); static void kssl_event_callback(uint32_t, void *); /* * DDI entry points. */ int _init(void) { return (mod_install(&modlinkage)); } int _info(struct modinfo *modinfop) { return (mod_info(&modlinkage, modinfop)); } /* ARGSUSED */ static int kssl_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result) { switch (cmd) { case DDI_INFO_DEVT2DEVINFO: *result = kssl_dip; return (DDI_SUCCESS); case DDI_INFO_DEVT2INSTANCE: *result = (void *)0; return (DDI_SUCCESS); } return (DDI_FAILURE); } static int kssl_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) { if (cmd != DDI_ATTACH) { return (DDI_FAILURE); } if (ddi_get_instance(dip) != 0) { /* we only allow instance 0 to attach */ return (DDI_FAILURE); } /* create the minor node */ if (ddi_create_minor_node(dip, "kssl", S_IFCHR, 0, DDI_PSEUDO, 0) != DDI_SUCCESS) { cmn_err(CE_WARN, "kssl_attach: failed creating minor node"); ddi_remove_minor_node(dip, NULL); return (DDI_FAILURE); } kssl_dip = dip; kssl_global_init(); return (DDI_SUCCESS); } static kstat_t *kssl_ksp = NULL; static int kssl_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) { if (cmd != DDI_DETACH) return (DDI_FAILURE); if (kssl_entry_tab_nentries != 0 || kssl_cache_count != 0) return (DDI_FAILURE); mutex_destroy(&kssl_tab_mutex); kssl_dip = NULL; if (kssl_cache != NULL) { kmem_cache_destroy(kssl_cache); kssl_cache = NULL; } if (kssl_ksp != NULL) { kstat_delete(kssl_ksp); kssl_ksp = NULL; } ddi_remove_minor_node(dip, NULL); return (DDI_SUCCESS); } static crypto_notify_handle_t prov_update_handle = NULL; /* ARGSUSED */ static int kssl_open(dev_t *devp, int flag, int otyp, cred_t *credp) { if (otyp != OTYP_CHR) return (ENXIO); if (kssl_dip == NULL) return (ENXIO); /* first time here? initialize everything */ if (rsa_x509_mech.cm_type == CRYPTO_MECH_INVALID) { kssl_init_mechs(); prov_update_handle = crypto_notify_events( kssl_event_callback, CRYPTO_EVENT_MECHS_CHANGED); } /* exclusive opens are not supported */ if (flag & FEXCL) return (ENOTSUP); return (0); } /* ARGSUSED */ static int kssl_close(dev_t dev, int flag, int otyp, cred_t *credp) { return (0); } #define KSSL_MAX_KEYANDCERTS 80000 /* max 64K plus a little margin */ /* ARGSUSED */ static int kssl_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *c, int *rval) { int error = EINVAL; uint32_t auditing = AU_AUDITING(); #define ARG ((caddr_t)arg) if (secpolicy_net_config(c, B_FALSE) != 0) { return (EPERM); } switch (cmd) { case KSSL_ADD_ENTRY: { uint64_t len; uint32_t ck_rv; size_t off; kssl_params_t *kssl_params; off = offsetof(kssl_params_t, kssl_params_size); if (copyin(ARG + off, &len, sizeof (len)) != 0) { return (EFAULT); } if (len < sizeof (kssl_params_t) || len > KSSL_MAX_KEYANDCERTS) { return (EINVAL); } kssl_params = kmem_alloc(len, KM_SLEEP); /* Get the whole structure and parameters in one move */ if (copyin(ARG, kssl_params, len) != 0) { kmem_free(kssl_params, len); return (EFAULT); } error = kssl_add_entry(kssl_params); if (auditing) audit_kssl(KSSL_ADD_ENTRY, kssl_params, error); off = offsetof(kssl_params_t, kssl_token) + offsetof(kssl_tokinfo_t, ck_rv); ck_rv = kssl_params->kssl_token.ck_rv; if (copyout(&ck_rv, ARG + off, sizeof (ck_rv)) != 0) { error = EFAULT; } bzero(kssl_params, len); kmem_free(kssl_params, len); break; } case KSSL_DELETE_ENTRY: { struct sockaddr_in6 server_addr; if (copyin(ARG, &server_addr, sizeof (server_addr)) != 0) { return (EFAULT); } error = kssl_delete_entry(&server_addr); if (auditing) audit_kssl(KSSL_DELETE_ENTRY, &server_addr, error); break; } } return (error); } #define NUM_MECHS 7 static mech_to_cipher_t mech_to_cipher_tab[NUM_MECHS] = { {CRYPTO_MECH_INVALID, SUN_CKM_RSA_X_509, {SSL_RSA_WITH_RC4_128_MD5, SSL_RSA_WITH_RC4_128_SHA, SSL_RSA_WITH_DES_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, SSL_RSA_WITH_NULL_SHA}}, {CRYPTO_MECH_INVALID, SUN_CKM_MD5_HMAC, {SSL_RSA_WITH_RC4_128_MD5}}, {CRYPTO_MECH_INVALID, SUN_CKM_SHA1_HMAC, {SSL_RSA_WITH_RC4_128_SHA, SSL_RSA_WITH_DES_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_NULL_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA}}, {CRYPTO_MECH_INVALID, SUN_CKM_RC4, {SSL_RSA_WITH_RC4_128_MD5, SSL_RSA_WITH_RC4_128_SHA}}, {CRYPTO_MECH_INVALID, SUN_CKM_DES_CBC, {SSL_RSA_WITH_DES_CBC_SHA}}, {CRYPTO_MECH_INVALID, SUN_CKM_DES3_CBC, {SSL_RSA_WITH_3DES_EDE_CBC_SHA}}, {CRYPTO_MECH_INVALID, SUN_CKM_AES_CBC, {TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA}}, }; static void kssl_init_mechs() { mech_to_cipher_tab[0].mech = rsa_x509_mech.cm_type = crypto_mech2id(SUN_CKM_RSA_X_509); mech_to_cipher_tab[1].mech = hmac_md5_mech.cm_type = crypto_mech2id(SUN_CKM_MD5_HMAC); mech_to_cipher_tab[2].mech = hmac_sha1_mech.cm_type = crypto_mech2id(SUN_CKM_SHA1_HMAC); mech_to_cipher_tab[3].mech = cipher_defs[cipher_rc4].mech_type = crypto_mech2id(SUN_CKM_RC4); mech_to_cipher_tab[4].mech = cipher_defs[cipher_des].mech_type = crypto_mech2id(SUN_CKM_DES_CBC); mech_to_cipher_tab[5].mech = cipher_defs[cipher_3des].mech_type = crypto_mech2id(SUN_CKM_DES3_CBC); mech_to_cipher_tab[6].mech = cipher_defs[cipher_aes128].mech_type = cipher_defs[cipher_aes256].mech_type = crypto_mech2id(SUN_CKM_AES_CBC); } static int is_in_suites(uint16_t s, uint16_t *sarray) { int i; for (i = 0; i < CIPHER_SUITE_COUNT; i++) { if (s == sarray[i]) return (1); } return (0); } static int is_in_mechlist(char *name, crypto_mech_name_t *mechs, int count) { int i; for (i = 0; i < count; i++) { if (strncmp(name, mechs[i], CRYPTO_MAX_MECH_NAME) == 0) return (1); } return (0); } /* * Callback function invoked by the crypto framework when a provider's * mechanism is available/unavailable. This callback updates entries in the * kssl_entry_tab[] to make changes to the cipher suites of an entry * which are affected by the mechanism. */ static void kssl_event_callback(uint32_t event, void *event_arg) { int i, j; int cnt, rcnt; uint16_t s; boolean_t changed; crypto_mech_name_t *mechs; uint_t mech_count; mech_to_cipher_t *mc; kssl_entry_t *old; kssl_entry_t *new; uint16_t tmp_suites[CIPHER_SUITE_COUNT]; uint16_t dis_list[CIPHER_SUITE_COUNT]; crypto_notify_event_change_t *prov_change = (crypto_notify_event_change_t *)event_arg; /* ignore events for which we didn't register */ if (event != CRYPTO_EVENT_MECHS_CHANGED) { return; } for (i = 0; i < NUM_MECHS; i++) { mc = &(mech_to_cipher_tab[i]); if (mc->mech == CRYPTO_MECH_INVALID) continue; /* * Check if this crypto framework provider mechanism being * added or removed affects us. */ if (strncmp(mc->name, prov_change->ec_mech_name, CRYPTO_MAX_MECH_NAME) == 0) break; } if (i == NUM_MECHS) return; mechs = crypto_get_mech_list(&mech_count, KM_SLEEP); if (mechs == NULL) return; mutex_enter(&kssl_tab_mutex); for (i = 0; i < kssl_entry_tab_size; i++) { if ((old = kssl_entry_tab[i]) == NULL) continue; cnt = 0; rcnt = 0; changed = B_FALSE; for (j = 0; j < CIPHER_SUITE_COUNT; j++) { tmp_suites[j] = CIPHER_NOTSET; dis_list[j] = CIPHER_NOTSET; } /* * We start with the saved cipher suite list for the new entry. * If a mechanism is disabled, resulting in a cipher suite being * disabled now, we take it out from the list for the new entry. * If a mechanism is enabled, resulting in a cipher suite being * enabled now, we don't need to do any thing. */ if (!is_in_mechlist(mc->name, mechs, mech_count)) { for (j = 0; j < CIPHER_SUITE_COUNT; j++) { s = mc->kssl_suites[j]; if (s == 0) break; if (is_in_suites(s, old->kssl_saved_Suites)) { /* Disable this cipher suite */ if (!is_in_suites(s, dis_list)) dis_list[cnt++] = s; } } } for (j = 0; j < CIPHER_SUITE_COUNT; j++) { s = old->kssl_saved_Suites[j]; if (!is_in_suites(s, dis_list)) tmp_suites[rcnt] = s; if (!changed && (tmp_suites[rcnt] != old->kssl_cipherSuites[rcnt])) changed = B_TRUE; rcnt++; } if (changed) { new = kmem_zalloc(sizeof (kssl_entry_t), KM_NOSLEEP); if (new == NULL) continue; *new = *old; /* Structure copy */ old->ke_no_freeall = B_TRUE; new->ke_refcnt = 0; new->kssl_cipherSuites_nentries = rcnt; for (j = 0; j < CIPHER_SUITE_COUNT; j++) new->kssl_cipherSuites[j] = tmp_suites[j]; KSSL_ENTRY_REFHOLD(new); kssl_entry_tab[i] = new; KSSL_ENTRY_REFRELE(old); } } mutex_exit(&kssl_tab_mutex); crypto_free_mech_list(mechs, mech_count); } kssl_stats_t *kssl_statp; static void kssl_global_init() { mutex_init(&kssl_tab_mutex, NULL, MUTEX_DRIVER, NULL); kssl_cache = kmem_cache_create("kssl_cache", sizeof (ssl_t), 0, kssl_constructor, kssl_destructor, NULL, NULL, NULL, 0); if ((kssl_ksp = kstat_create("kssl", 0, "kssl_stats", "crypto", KSTAT_TYPE_NAMED, sizeof (kssl_stats_t) / sizeof (kstat_named_t), KSTAT_FLAG_PERSISTENT)) != NULL) { kssl_statp = kssl_ksp->ks_data; kstat_named_init(&kssl_statp->sid_cache_lookups, "kssl_sid_cache_lookups", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->sid_cache_hits, "kssl_sid_cache_hits", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->sid_cached, "kssl_sid_cached", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->sid_uncached, "kssl_sid_uncached", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->full_handshakes, "kssl_full_handshakes", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->resumed_sessions, "kssl_resumed_sessions", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->fallback_connections, "kssl_fallback_connections", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->proxy_fallback_failed, "kssl_proxy_fallback_failed", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->appdata_record_ins, "kssl_appdata_record_ins", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->appdata_record_outs, "kssl_appdata_record_outs", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->alloc_fails, "kssl_alloc_fails", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->fatal_alerts, "kssl_fatal_alerts", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->warning_alerts, "kssl_warning_alerts", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->no_suite_found, "kssl_no_suite_found", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->compute_mac_failure, "kssl_compute_mac_failure", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->verify_mac_failure, "kssl_verify_mac_failure", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->record_decrypt_failure, "kssl_record_decrypt_failure", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->bad_pre_master_secret, "kssl_bad_pre_master_secret", KSTAT_DATA_UINT64); kstat_named_init(&kssl_statp->internal_errors, "kssl_internal_errors", KSTAT_DATA_UINT64); kstat_install(kssl_ksp); }; } /*ARGSUSED*/ static int kssl_constructor(void *buf, void *arg, int kmflags) { ssl_t *ssl = buf; mutex_init(&ssl->kssl_lock, NULL, MUTEX_DEFAULT, NULL); return (0); } /*ARGSUSED*/ static void kssl_destructor(void *buf, void *arg) { ssl_t *ssl = buf; mutex_destroy(&ssl->kssl_lock); } /* * Handler routine called by the crypto framework when a * provider is unregistered or registered. We invalidate the * private key handle if our provider is unregistered. We set * a flag to reauthenticate if our provider came back. */ void kssl_prov_evnt(uint32_t event, void *event_arg) { int i, rv; kssl_entry_t *ep; kssl_session_info_t *s; crypto_provider_t prov; crypto_provider_ext_info_t info; if (event != CRYPTO_EVENT_PROVIDER_UNREGISTERED && event != CRYPTO_EVENT_PROVIDER_REGISTERED) return; prov = (crypto_provider_t)event_arg; if (event == CRYPTO_EVENT_PROVIDER_REGISTERED) { rv = crypto_get_provinfo(prov, &info); if (rv != CRYPTO_SUCCESS) return; } mutex_enter(&kssl_tab_mutex); for (i = 0; i < kssl_entry_tab_size; i++) { if ((ep = kssl_entry_tab[i]) == NULL) continue; s = ep->ke_sessinfo; DTRACE_PROBE1(kssl_entry_cycle, kssl_entry_t *, ep); switch (event) { case CRYPTO_EVENT_PROVIDER_UNREGISTERED: if (s->is_valid_handle && s->prov == prov) { s->is_valid_handle = B_FALSE; crypto_release_provider(s->prov); } break; case CRYPTO_EVENT_PROVIDER_REGISTERED: if (s->is_valid_handle) break; if (bcmp(s->toklabel, info.ei_label, CRYPTO_EXT_SIZE_LABEL) == 0) { s->do_reauth = B_TRUE; } break; } } mutex_exit(&kssl_tab_mutex); }