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295 lines
9.7 KiB
C
295 lines
9.7 KiB
C
#ifndef _TLS_H_INCLUDED_
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#define _TLS_H_INCLUDED_
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/*++
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* NAME
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* tls 3h
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* SUMMARY
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* libtls internal interfaces
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* SYNOPSIS
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* #include <tls.h>
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* DESCRIPTION
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* .nf
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*
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* Utility library.
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*/
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#include "lib_acl.h"
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#ifdef USE_TLS
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef TLS_DLL
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# ifdef TLS_EXPORTS
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# define TLS_API __declspec(dllexport)
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# else
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# define TLS_API __declspec(dllimport)
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# endif
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#else
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# define TLS_API
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#endif
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/*
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* OpenSSL library.
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*/
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#include <openssl/lhash.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/pem.h>
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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#include <openssl/rand.h>
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#include <openssl/ssl.h>
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#if (OPENSSL_VERSION_NUMBER < 0x00905100L)
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#error "need OpenSSL version 0.9.5 or later"
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#endif
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/*
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* TLS enforcement levels. Non-sentinel values may also be used to indicate
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* the actual security level of a session.
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*
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* XXX TLS_LEV_NOTFOUND no longer belongs in this list. The SMTP client will
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* have to use something else to report that policy table lookup failed.
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*/
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#define TLS_LEV_INVALID -2 /* sentinel */
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#define TLS_LEV_NOTFOUND -1 /* XXX not in policy table */
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#define TLS_LEV_NONE 0 /* plain-text only */
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#define TLS_LEV_MAY 1 /* wildcard */
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#define TLS_LEV_ENCRYPT 2 /* encrypted connection */
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#define TLS_LEV_FPRINT 3 /* "peer" CA-less verification */
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#define TLS_LEV_VERIFY 4 /* certificate verified */
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#define TLS_LEV_SECURE 5 /* "secure" verification */
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/*
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* Peer status bits. TLS_CERT_FLAG_MATCHED implies TLS_CERT_FLAG_TRUSTED
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* only in the case of a hostname match.
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*/
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#define TLS_CERT_FLAG_PRESENT (1<<0)
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#define TLS_CERT_FLAG_ALTNAME (1<<1)
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#define TLS_CERT_FLAG_TRUSTED (1<<2)
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#define TLS_CERT_FLAG_MATCHED (1<<3)
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#define TLS_CERT_FLAG_LOGGED (1<<4) /* Logged trust chain error */
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#define TLS_CERT_IS_PRESENT(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_PRESENT))
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#define TLS_CERT_IS_ALTNAME(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_ALTNAME))
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#define TLS_CERT_IS_TRUSTED(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_TRUSTED))
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#define TLS_CERT_IS_MATCHED(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_MATCHED))
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/*
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* Names of valid tlsmgr(8) session caches.
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*/
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#define TLS_MGR_SCACHE_SERVER "server"
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#define TLS_MGR_SCACHE_CLIENT "client"
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/*
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* TLS session context, also used by the ACL_VSTREAM call-back routines for SMTP
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* input/output, and by OpenSSL call-back routines for key verification.
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* Only some members are (read-only) accessible by the public.
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*/
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typedef struct TLS_SESS_STATE TLS_SESS_STATE;
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struct TLS_SESS_STATE {
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/* Public, read-only. */
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char *peer_CN; /* Peer Common Name */
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char *issuer_CN; /* Issuer Common Name */
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char *peer_fingerprint; /* ASCII fingerprint */
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int peer_status; /* Certificate and match status */
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const char *protocol;
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const char *cipher_name;
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int cipher_usebits;
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int cipher_algbits;
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/* Private. */
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SSL *con;
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BIO *internal_bio; /* postfix/TLS side of pair */
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BIO *network_bio; /* network side of pair */
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char *cache_type; /* tlsmgr(8) cache type if enabled */
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char *serverid; /* unique server identifier */
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char *namaddr; /* nam[addr] for logging */
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int log_level; /* TLS library logging level */
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int session_reused; /* this session was reused */
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int am_server; /* Are we an SSL server or client? */
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};
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/*
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* Opaque client context handle.
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*/
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typedef struct TLS_APPL_STATE TLS_APPL_STATE;
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/*
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* tls_client.c
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*/
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typedef struct {
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int log_level;
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int verifydepth;
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const char *cache_type;
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const char *cert_file;
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const char *key_file;
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const char *dcert_file;
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const char *dkey_file;
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const char *eccert_file;
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const char *eckey_file;
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const char *CAfile;
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const char *CApath;
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const char *fpt_dgst; /* Fingerprint digest algorithm */
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} TLS_CLIENT_INIT_PROPS;
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typedef struct {
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TLS_APPL_STATE *ctx;
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ACL_VSTREAM *stream;
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int log_level;
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int timeout;
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int tls_level; /* Security level */
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const char *nexthop; /* destination domain */
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const char *host; /* MX hostname */
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const char *namaddr; /* nam[addr] for logging */
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const char *serverid; /* Session cache key */
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const char *protocols; /* Enabled protocols */
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const char *cipher_grade; /* Minimum cipher grade */
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const char *cipher_exclusions; /* Ciphers to exclude */
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const ACL_ARGV *matchargv; /* Cert match patterns */
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const char *fpt_dgst; /* Fingerprint digest algorithm */
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} TLS_CLIENT_START_PROPS;
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TLS_API void tls_client_init(void);
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TLS_API int tls_client_setup(const TLS_CLIENT_INIT_PROPS *);
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TLS_API TLS_APPL_STATE *tls_client_create(const TLS_CLIENT_INIT_PROPS *);
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TLS_API TLS_SESS_STATE *tls_client_start(const TLS_CLIENT_START_PROPS *);
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#define tls_client_stop(ctx, stream, timeout, failure, TLScontext) \
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tls_session_stop(ctx, (stream), (timeout), (failure), (TLScontext))
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#define TLS_CLIENT_SETUP(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
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a10, a11, a12) \
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tls_client_setup((((props)->a1), ((props)->a2), ((props)->a3), \
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((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
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((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
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((props)->a12), (props)))
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#define TLS_CLIENT_CREATE(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
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a10, a11, a12) \
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tls_client_init((((props)->a1), ((props)->a2), ((props)->a3), \
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((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
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((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
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((props)->a12), (props)))
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#define TLS_CLIENT_START(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
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a10, a11, a12, a13, a14) \
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tls_client_start((((props)->a1), ((props)->a2), ((props)->a3), \
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((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
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((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
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((props)->a12), ((props)->a13), ((props)->a14), (props)))
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/*
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* tls_server.c
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*/
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typedef struct {
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int log_level;
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int verifydepth;
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const char *cache_type;
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long scache_timeout;
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int set_sessid;
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const char *cert_file;
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const char *key_file;
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const char *dcert_file;
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const char *dkey_file;
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const char *eccert_file;
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const char *eckey_file;
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const char *CAfile;
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const char *CApath;
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const char *protocols;
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const char *eecdh_grade;
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const char *dh1024_param_file;
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const char *dh512_param_file;
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int ask_ccert;
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const char *fpt_dgst; /* Fingerprint digest algorithm */
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} TLS_SERVER_INIT_PROPS;
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typedef struct {
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TLS_APPL_STATE *ctx; /* TLS application context */
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ACL_VSTREAM *stream; /* Client stream */
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int log_level; /* TLS log level */
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int timeout; /* TLS handshake timeout */
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int requirecert; /* Insist on client cert? */
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const char *serverid; /* Server instance (salt cache key) */
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const char *namaddr; /* Client nam[addr] for logging */
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const char *cipher_grade;
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const char *cipher_exclusions;
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const char *fpt_dgst; /* Fingerprint digest algorithm */
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} TLS_SERVER_START_PROPS;
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TLS_API void tls_server_init(void);
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TLS_API int tls_server_setup(const TLS_SERVER_INIT_PROPS *);
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TLS_API TLS_APPL_STATE *tls_server_create(const TLS_SERVER_INIT_PROPS *);
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TLS_API TLS_SESS_STATE *tls_server_start(const TLS_SERVER_START_PROPS *props);
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#define tls_server_stop(ctx, stream, timeout, failure, TLScontext) \
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tls_session_stop(ctx, (stream), (timeout), (failure), (TLScontext))
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#define TLS_SERVER_SETUP(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
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a10, a11, a12, a13, a14, a15, a16, a17, a18, a19) \
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tls_server_setup((((props)->a1), ((props)->a2), ((props)->a3), \
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((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
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((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
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((props)->a12), ((props)->a13), ((props)->a14), ((props)->a15), \
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((props)->a16), ((props)->a17), ((props)->a18), ((props)->a19), (props)))
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#define TLS_SERVER_CREATE(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
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a10, a11, a12, a13, a14, a15, a16, a17, a18, a19) \
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tls_server_init((((props)->a1), ((props)->a2), ((props)->a3), \
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((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
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((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
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((props)->a12), ((props)->a13), ((props)->a14), ((props)->a15), \
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((props)->a16), ((props)->a17), ((props)->a18), ((props)->a19), (props)))
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#define TLS_SERVER_START(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10) \
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tls_server_start((((props)->a1), ((props)->a2), ((props)->a3), \
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((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
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((props)->a8), ((props)->a9), ((props)->a10), (props)))
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/*
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* tls_session.c
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*/
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TLS_API void tls_session_stop(TLS_APPL_STATE *, ACL_VSTREAM *, int, int, TLS_SESS_STATE *);
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/*
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* tls_misc.c One time finalization of application context.
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*/
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TLS_API void tls_free_app_context(TLS_APPL_STATE *);
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/*
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* tls_params.c
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*/
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TLS_API void tls_params_init(void);
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/*
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* tlsmgr_daemon.c
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*/
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TLS_API void tlsmgr_alone_start(int argc, char *argv[]);
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TLS_API void tlsmgr_local_start(const char *addr);
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/* LICENSE
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* .ad
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* .fi
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* The Secure Mailer license must be distributed with this software.
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* AUTHOR(S)
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* Wietse Venema
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* IBM T.J. Watson Research
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* P.O. Box 704
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* Yorktown Heights, NY 10598, USA
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*
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* Victor Duchovni
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* Morgan Stanley
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*--*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* USE_TLS */
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#endif /* _TLS_H_INCLUDED_ */
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