1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _KERNELSESSION_H 27 #define _KERNELSESSION_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #include <pthread.h> 36 #include <sys/crypto/common.h> 37 #include <security/pkcs11t.h> 38 39 40 #define KERNELTOKEN_SESSION_MAGIC 0xECF00003 41 42 typedef struct crypto_active_op { 43 CK_MECHANISM mech; 44 void *context; 45 uint32_t flags; 46 } crypto_active_op_t; 47 48 #define EDIGEST_LENGTH 1024 49 50 /* Used for emulating digest and HMAC mechs */ 51 typedef struct digest_buf { 52 uint8_t *buf; 53 int buf_len; 54 int indata_len; 55 void *soft_sp; 56 } digest_buf_t; 57 58 /* 59 * Definition for flags in crypto_active_op_t 60 * 61 * CRYPTO_EMULATE flag is set for a digest or sign/verify with a HMAC 62 * mechanism, if the session slot has a CRYPTO_LIMITED_HASH_SUPPORT flag set. 63 * CRYPTO_EMULATE_USING_SW flag is meaningful only when CRYPTO_EMULATE flag 64 * is set. And CRYPTO_EMULATE_UPDATE_DONE flag is meaningful only when 65 * CRYPTO_EMULATE_USING_SW flag is set. 66 */ 67 #define CRYPTO_OPERATION_ACTIVE 0x00000001 /* Cryptoki operation is active */ 68 #define CRYPTO_OPERATION_UPDATE 0x00000002 /* Cryptoki multi-part op active */ 69 #define CRYPTO_EMULATE 0x00000004 /* op needs emulation */ 70 #define CRYPTO_EMULATE_USING_SW 0x00000008 /* ... use software */ 71 #define CRYPTO_EMULATE_UPDATE_DONE 0x00000010 /* did at least one update */ 72 73 typedef struct session { 74 CK_ULONG magic_marker; /* magic # be validated for integrity */ 75 pthread_mutex_t session_mutex; /* session's mutex lock */ 76 pthread_mutex_t ses_free_mutex; /* mutex used during closing session */ 77 pthread_cond_t ses_free_cond; /* cond variable for signal and wait */ 78 uint32_t ses_refcnt; /* session reference count */ 79 uint32_t ses_close_sync; /* session closing flags */ 80 crypto_session_id_t k_session; /* kernel session ID */ 81 boolean_t ses_RO; /* RO or RW session flag */ 82 CK_SLOT_ID ses_slotid; /* slotID saved from C_OpenSession() */ 83 84 /* Place holder for parameters passed in the C_OpenSession */ 85 CK_FLAGS flags; 86 CK_NOTIFY Notify; 87 CK_VOID_PTR pApplication; 88 89 /* Pointers to form the global session list */ 90 struct session *next; /* points to next session on the list */ 91 struct session *prev; /* points to prev session on the list */ 92 93 struct object *object_list; /* points to list of objects */ 94 95 crypto_active_op_t digest; /* context of active digest operation */ 96 crypto_active_op_t encrypt; /* context of active encrypt op */ 97 crypto_active_op_t decrypt; /* context of active decrypt op */ 98 crypto_active_op_t sign; /* context of active sign op */ 99 crypto_active_op_t verify; /* context of active verify op */ 100 crypto_active_op_t find_objects; 101 } kernel_session_t; 102 103 /* 104 * The following structure is used to link the to-be-freed sessions 105 * into a linked list. The sessions on this linked list have 106 * not yet been freed via free() after C_CloseSession() call; instead 107 * they are added to this list. The actual free will take place when 108 * the number of sessions queued reaches MAX_SES_TO_BE_FREED, at which 109 * time the first session in the list will be freed. 110 */ 111 #define MAX_SES_TO_BE_FREED 300 112 113 typedef struct ses_to_be_freed_list { 114 kernel_session_t *first; /* points to the first session in the list */ 115 kernel_session_t *last; /* points to the last session in the list */ 116 uint32_t count; /* current total sessions in the list */ 117 pthread_mutex_t ses_to_be_free_mutex; 118 } ses_to_be_freed_list_t; 119 120 extern ses_to_be_freed_list_t ses_delay_freed; 121 122 /* 123 * Flag definitions for ses_close_sync 124 */ 125 #define SESSION_IS_CLOSING 1 /* Session is in a closing state */ 126 #define SESSION_REFCNT_WAITING 2 /* Waiting for session reference */ 127 /* count to become zero */ 128 /* 129 * This macro is used to decrement the session reference count by one. 130 * 131 * The caller of this macro uses the argument lock_held to indicate that 132 * whether the caller holds the lock on the session or not. 133 * 134 * REFRELE macro does the following: 135 * 1) Get the session lock if the caller does not hold it. 136 * 2) Decrement the session reference count by one. 137 * 3) If the session reference count becomes zero after being decremented, 138 * and there is a closing session thread in the wait state, then 139 * call pthread_cond_signal() to wake up that thread who is blocked 140 * in the session deletion routine due to non-zero reference ount. 141 * 4) Always release the session lock. 142 */ 143 #define REFRELE(s, ses_lock_held) { \ 144 if (!ses_lock_held) \ 145 (void) pthread_mutex_lock(&s->session_mutex); \ 146 if ((--((s)->ses_refcnt) == 0) && \ 147 (s->ses_close_sync & SESSION_REFCNT_WAITING)) { \ 148 (void) pthread_mutex_unlock(&s->session_mutex); \ 149 (void) pthread_cond_signal(&s->ses_free_cond); \ 150 } else { \ 151 (void) pthread_mutex_unlock(&s->session_mutex); \ 152 } \ 153 } 154 155 156 /* 157 * Function Prototypes. 158 */ 159 CK_RV handle2session(CK_SESSION_HANDLE hSession, kernel_session_t **session_p); 160 161 void kernel_delete_all_sessions(CK_SLOT_ID slotID, boolean_t wrapper_only); 162 163 void kernel_delete_all_objects_in_session(kernel_session_t *sp, 164 boolean_t wrapper_only); 165 166 CK_RV kernel_add_session(CK_SLOT_ID slotID, CK_FLAGS flags, 167 CK_VOID_PTR pApplication, CK_NOTIFY notify, CK_ULONG *phSession); 168 169 void kernel_delete_session(CK_SLOT_ID slotID, kernel_session_t *sp, 170 boolean_t lock_held, boolean_t wrapper_only); 171 172 void kernel_session_delay_free(kernel_session_t *sp); 173 174 #ifdef __cplusplus 175 } 176 #endif 177 178 #endif /* _KERNELSESSION_H */ 179