mod_ssl.h

Apache HTTP Server 是一个功能强大的灵活的与HTTP/1.1相兼容的web服务器.这里给出的是Apache HTTP服务器的源码。

/* Copyright 2001-2005 The Apache Software Foundation or its licensors, as
 * applicable.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*                      _             _
 *  _ __ ___   ___   __| |    ___ ___| |  mod_ssl
 * | '_ ` _ \ / _ \ / _` |   / __/ __| |  Apache Interface to OpenSSL
 * | | | | | | (_) | (_| |   \__ \__ \ |
 * |_| |_| |_|\___/ \__,_|___|___/___/_|
 *                      |_____|
 *  mod_ssl.h
 *  Global header
 */
                             /* ``The Apache Group: a collection
                                  of talented individuals who are
                                  trying to perfect the art of
                                  never finishing something.''
                                             -- Rob Hartill         */
#ifndef __MOD_SSL_H__
#define __MOD_SSL_H__

/* 
 * Optionally enable the experimental stuff, but allow the user to
 * override the decision which experimental parts are included by using
 * CFLAGS="-DSSL_EXPERIMENTAL_xxxx_IGNORE".
 */
#ifdef SSL_EXPERIMENTAL
#ifdef SSL_ENGINE
#ifndef SSL_EXPERIMENTAL_ENGINE_IGNORE
#define SSL_EXPERIMENTAL_ENGINE
#endif
#endif
#endif /* SSL_EXPERIMENTAL */

/*
 * Power up our brain...
 */

/* Apache headers */
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_main.h"
#include "http_connection.h"
#include "http_request.h"
#include "http_protocol.h"
#include "util_script.h"
#include "util_filter.h"
#include "mpm.h"
#include "apr.h"
#include "apr_strings.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "apr_tables.h"
#include "apr_lib.h"
#include "apr_fnmatch.h"
#include "apr_strings.h"
#include "apr_dbm.h"
#include "apr_rmm.h"
#include "apr_shm.h"
#include "apr_global_mutex.h"
#include "apr_optional.h"

#define MOD_SSL_VERSION AP_SERVER_BASEREVISION

#ifdef HAVE_SSLC
  
#include <bio.h>
#include <ssl.h>
#include <err.h>
#include <x509.h>
#include <pem.h>
#include <evp.h>
#include <objects.h>
#include <sslc.h>

#else /* !HAVE_SSLC (implicit HAVE_OPENSSL) */

#include <ssl.h>
#include <err.h>
#include <x509.h>
#include <pem.h>
#include <crypto.h>
#include <evp.h>
#include <rand.h>
#ifdef SSL_EXPERIMENTAL_ENGINE
#include <engine.h>
#endif
#ifdef HAVE_SSL_X509V3_H
#include <x509v3.h>
#endif

#endif /* !HAVE_SSLC (implicit HAVE_OPENSSL) */


/* mod_ssl headers */
#include "ssl_toolkit_compat.h"
#include "ssl_expr.h"
#include "ssl_util_ssl.h"
#include "ssl_util_table.h"

/* The #ifdef macros are only defined AFTER including the above
 * therefore we cannot include these system files at the top  :-(
 */
#if APR_HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h> /* needed for STDIN_FILENO et.al., at least on FreeBSD */
#endif

/*
 * Provide reasonable default for some defines
 */
#ifndef FALSE
#define FALSE (0)
#endif
#ifndef TRUE
#define TRUE (!FALSE)
#endif
#ifndef PFALSE
#define PFALSE ((void *)FALSE)
#endif
#ifndef PTRUE
#define PTRUE ((void *)TRUE)
#endif
#ifndef UNSET
#define UNSET (-1)
#endif
#ifndef NUL
#define NUL '\0'
#endif
#ifndef RAND_MAX
#include <limits.h>
#define RAND_MAX INT_MAX
#endif

/*
 * Provide reasonable defines for some types
 */
#ifndef BOOL
#define BOOL unsigned int
#endif
#ifndef UCHAR
#define UCHAR unsigned char
#endif

/*
 * Provide useful shorthands
 */
#define strEQ(s1,s2)     (strcmp(s1,s2)        == 0)
#define strNE(s1,s2)     (strcmp(s1,s2)        != 0)
#define strEQn(s1,s2,n)  (strncmp(s1,s2,n)     == 0)
#define strNEn(s1,s2,n)  (strncmp(s1,s2,n)     != 0)

#define strcEQ(s1,s2)    (strcasecmp(s1,s2)    == 0)
#define strcNE(s1,s2)    (strcasecmp(s1,s2)    != 0)
#define strcEQn(s1,s2,n) (strncasecmp(s1,s2,n) == 0)
#define strcNEn(s1,s2,n) (strncasecmp(s1,s2,n) != 0)

#define strIsEmpty(s)    (s == NULL || s[0] == NUL)

#define myConnConfig(c) \
(SSLConnRec *)ap_get_module_config(c->conn_config, &ssl_module)
#define myCtxConfig(sslconn, sc) (sslconn->is_proxy ? sc->proxy : sc->server)
#define myConnConfigSet(c, val) \
ap_set_module_config(c->conn_config, &ssl_module, val)
#define mySrvConfig(srv) (SSLSrvConfigRec *)ap_get_module_config(srv->module_config,  &ssl_module)
#define myDirConfig(req) (SSLDirConfigRec *)ap_get_module_config(req->per_dir_config, &ssl_module)
#define myModConfig(srv) (mySrvConfig((srv)))->mc

#define myCtxVarSet(mc,num,val)  mc->rCtx.pV##num = val
#define myCtxVarGet(mc,num,type) (type)(mc->rCtx.pV##num)

/*
 * Defaults for the configuration
 */
#ifndef SSL_SESSION_CACHE_TIMEOUT
#define SSL_SESSION_CACHE_TIMEOUT  300
#endif

/*
 * Support for MM library
 */
#define SSL_MM_FILE_MODE ( APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD )

/*
 * Support for DBM library
 */
#define SSL_DBM_FILE_MODE ( APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD )

#if !defined(SSL_DBM_FILE_SUFFIX_DIR) && !defined(SSL_DBM_FILE_SUFFIX_PAG)
#if defined(DBM_SUFFIX)
#define SSL_DBM_FILE_SUFFIX_DIR DBM_SUFFIX
#define SSL_DBM_FILE_SUFFIX_PAG DBM_SUFFIX
#elif defined(__FreeBSD__) || (defined(DB_LOCK) && defined(DB_SHMEM))
#define SSL_DBM_FILE_SUFFIX_DIR ".db"
#define SSL_DBM_FILE_SUFFIX_PAG ".db"
#else
#define SSL_DBM_FILE_SUFFIX_DIR ".dir"
#define SSL_DBM_FILE_SUFFIX_PAG ".pag"
#endif
#endif

/*
 * Define the certificate algorithm types
 */

typedef int ssl_algo_t;

#define SSL_ALGO_UNKNOWN (0)
#define SSL_ALGO_RSA     (1<<0)
#define SSL_ALGO_DSA     (1<<1)
#define SSL_ALGO_ALL     (SSL_ALGO_RSA|SSL_ALGO_DSA)

#define SSL_AIDX_RSA     (0)
#define SSL_AIDX_DSA     (1)
#define SSL_AIDX_MAX     (2)


/*
 * Define IDs for the temporary RSA keys and DH params
 */

#define SSL_TMP_KEY_RSA_512  (0)
#define SSL_TMP_KEY_RSA_1024 (1)
#define SSL_TMP_KEY_DH_512   (2)
#define SSL_TMP_KEY_DH_1024  (3)
#define SSL_TMP_KEY_MAX      (4)

/*
 * Define the SSL options
 */
#define SSL_OPT_NONE           (0)
#define SSL_OPT_RELSET         (1<<0)
#define SSL_OPT_STDENVVARS     (1<<1)
#define SSL_OPT_COMPATENVVARS  (1<<2)
#define SSL_OPT_EXPORTCERTDATA (1<<3)
#define SSL_OPT_FAKEBASICAUTH  (1<<4)
#define SSL_OPT_STRICTREQUIRE  (1<<5)
#define SSL_OPT_OPTRENEGOTIATE (1<<6)
#define SSL_OPT_ALL            (SSL_OPT_STDENVVARS|SSL_OPT_COMPATENVVAR|SSL_OPT_EXPORTCERTDATA|SSL_OPT_FAKEBASICAUTH|SSL_OPT_STRICTREQUIRE|SSL_OPT_OPTRENEGOTIATE)
typedef int ssl_opt_t;

/*
 * Define the SSL Protocol options
 */
#define SSL_PROTOCOL_NONE  (0)
#define SSL_PROTOCOL_SSLV2 (1<<0)
#define SSL_PROTOCOL_SSLV3 (1<<1)
#define SSL_PROTOCOL_TLSV1 (1<<2)
#define SSL_PROTOCOL_ALL   (SSL_PROTOCOL_SSLV2|SSL_PROTOCOL_SSLV3|SSL_PROTOCOL_TLSV1)
typedef int ssl_proto_t;

/*
 * Define the SSL verify levels
 */
typedef enum {
    SSL_CVERIFY_UNSET           = UNSET,
    SSL_CVERIFY_NONE            = 0,
    SSL_CVERIFY_OPTIONAL        = 1,
    SSL_CVERIFY_REQUIRE         = 2,
    SSL_CVERIFY_OPTIONAL_NO_CA  = 3
} ssl_verify_t;

#define SSL_VERIFY_PEER_STRICT \
     (SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT)

#ifndef X509_V_ERR_CERT_UNTRUSTED
#define X509_V_ERR_CERT_UNTRUSTED 27
#endif

#define ssl_verify_error_is_optional(errnum) \
   ((errnum == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) \
    || (errnum == X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN) \
    || (errnum == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY) \
    || (errnum == X509_V_ERR_CERT_UNTRUSTED) \
    || (errnum == X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE))

/*
 * Define the SSL pass phrase dialog types
 */
typedef enum {
    SSL_PPTYPE_UNSET   = UNSET,
    SSL_PPTYPE_BUILTIN = 0,
    SSL_PPTYPE_FILTER  = 1,
	SSL_PPTYPE_PIPE    = 2
} ssl_pphrase_t;

/*
 * Define the Path Checking modes
 */
#define SSL_PCM_EXISTS     1
#define SSL_PCM_ISREG      2
#define SSL_PCM_ISDIR      4
#define SSL_PCM_ISNONZERO  8
typedef unsigned int ssl_pathcheck_t;

/*
 * Define the SSL session cache modes and structures
 */
typedef enum {
    SSL_SCMODE_UNSET = UNSET,
    SSL_SCMODE_NONE  = 0,
    SSL_SCMODE_DBM   = 1,
    SSL_SCMODE_SHMHT = 2,
    SSL_SCMODE_SHMCB = 3
} ssl_scmode_t;

/*
 * Define the SSL mutex modes
 */
typedef enum {
    SSL_MUTEXMODE_UNSET  = UNSET,
    SSL_MUTEXMODE_NONE   = 0,
    SSL_MUTEXMODE_USED   = 1
} ssl_mutexmode_t;

/*
 * Define the SSL requirement structure
 */
typedef struct {
    char     *cpExpr;
    ssl_expr *mpExpr;
} ssl_require_t;

/*
 * Define the SSL random number generator seeding source
 */
typedef enum {
    SSL_RSCTX_STARTUP = 1,
    SSL_RSCTX_CONNECT = 2
} ssl_rsctx_t;
typedef enum {
    SSL_RSSRC_BUILTIN = 1,
    SSL_RSSRC_FILE    = 2,
    SSL_RSSRC_EXEC    = 3,
    SSL_RSSRC_EGD     = 4
} ssl_rssrc_t;
typedef struct {
    ssl_rsctx_t  nCtx;