/* ========================================================================
* Copyright 1988-2008 University of Washington
*
* 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
*
*
* ========================================================================
*/
/*
* Program: SSL authentication/encryption module for Windows 9x and NT
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 22 September 1998
* Last Edited: 13 January 2008
*/
#define SECURITY_WIN32
#include <sspi.h>
#include <schannel.h>
#define SSLBUFLEN 8192
/* SSL I/O stream */
typedef struct ssl_stream {
TCPSTREAM *tcpstream; /* TCP stream */
CredHandle cred; /* SSL credentials */
CtxtHandle context; /* SSL context */
/* stream encryption sizes */
SecPkgContext_StreamSizes sizes;
size_t bufsize;
int ictr; /* input counter */
char *iptr; /* input pointer */
int iextractr; /* extra input counter */
char *iextraptr; /* extra input pointer */
char *ibuf; /* input buffer */
char *obuf; /* output buffer */
} SSLSTREAM;
#include "sslio.h"
/* Function prototypes */
static SSLSTREAM *ssl_start(TCPSTREAM *tstream,char *host,unsigned long flags);
static char *ssl_analyze_status (SECURITY_STATUS err,char *buf);
static char *ssl_getline_work (SSLSTREAM *stream,unsigned long *size,
long *contd);
static long ssl_abort (SSLSTREAM *stream);
/* Secure Sockets Layer network driver dispatch */
static struct ssl_driver ssldriver = {
ssl_open, /* open connection */
ssl_aopen, /* open preauthenticated connection */
ssl_getline, /* get a line */
ssl_getbuffer, /* get a buffer */
ssl_soutr, /* output pushed data */
ssl_sout, /* output string */
ssl_close, /* close connection */
ssl_host, /* return host name */
ssl_remotehost, /* return remote host name */
ssl_port, /* return port number */
ssl_localhost /* return local host name */
};
/* security function table */
static SecurityFunctionTable *sft = NIL;
static unsigned long ssltsz = 0;/* SSL maximum token length */
/* Define crypt32.dll stuff here in case a pre-IE5 Win9x system */
typedef DWORD (CALLBACK *CNTS) (DWORD,PCERT_NAME_BLOB,DWORD,LPSTR,DWORD);
typedef BOOL (CALLBACK *CGCC) (HCERTCHAINENGINE,PCCERT_CONTEXT,LPFILETIME,
HCERTSTORE,PCERT_CHAIN_PARA,DWORD,LPVOID,
PCCERT_CHAIN_CONTEXT *);
typedef BOOL (CALLBACK *CVCCP) (LPCSTR,PCCERT_CHAIN_CONTEXT,
PCERT_CHAIN_POLICY_PARA,
PCERT_CHAIN_POLICY_STATUS);
typedef VOID (CALLBACK *CFCC) (PCCERT_CHAIN_CONTEXT);
typedef BOOL (CALLBACK *CFCCX) (PCCERT_CONTEXT);
static CNTS certNameToStr = NIL;
static CGCC certGetCertificateChain = NIL;
static CVCCP certVerifyCertificateChainPolicy = NIL;
static CFCC certFreeCertificateChain = NIL;
static CFCCX certFreeCertificateContext = NIL;
/* One-time SSL initialization */
static int sslonceonly = 0;
void ssl_onceonlyinit (void)
{
if (!sslonceonly++) { /* only need to call it once */
HINSTANCE lib;
FARPROC pi;
ULONG np;
SecPkgInfo *pp;
int i;
/* get security library */
if (((lib = LoadLibrary ("schannel.dll")) ||
(lib = LoadLibrary ("security.dll"))) &&
(pi = GetProcAddress (lib,SECURITY_ENTRYPOINT)) &&
(sft = (SecurityFunctionTable *) pi ()) &&
!(sft->EnumerateSecurityPackages (&np,&pp))) {
/* look for an SSL package */
for (i = 0; (i < (int) np); i++) if (!strcmp (pp[i].Name,UNISP_NAME)) {
/* note maximum token size and name */
ssltsz = pp[i].cbMaxToken;
/* apply runtime linkage */
mail_parameters (NIL,SET_SSLDRIVER,(void *) &ssldriver);
mail_parameters (NIL,SET_SSLSTART,(void *) ssl_start);
if ((lib = LoadLibrary ("crypt32.dll")) &&
(certGetCertificateChain = (CGCC)
GetProcAddress (lib,"CertGetCertificateChain")) &&
(certVerifyCertificateChainPolicy = (CVCCP)
GetProcAddress (lib,"CertVerifyCertificateChainPolicy")) &&
(certFreeCertificateChain = (CFCC)
GetProcAddress (lib,"CertFreeCertificateChain")) &&
(certFreeCertificateContext = (CFCCX)
GetProcAddress (lib,"CertFreeCertificateContext")))
certNameToStr = (CNTS) GetProcAddress (lib,"CertNameToStrA");
return; /* all done */
}
}
}
}
/* SSL open
* Accepts: host name
* contact service name
* contact port number
* Returns: SSL stream if success else NIL
*/
SSLSTREAM *ssl_open (char *host,char *service,unsigned long port)
{
TCPSTREAM *stream = tcp_open (host,service,port);
return stream ? ssl_start (stream,host,port) : NIL;
}
/* SSL authenticated open
* Accepts: host name
* service name
* returned user name buffer
* Returns: SSL stream if success else NIL
*/
SSLSTREAM *ssl_aopen (NETMBX *mb,char *service,char *usrbuf)
{
return NIL; /* don't use this mechanism with SSL */
}
/* Start SSL/TLS negotiations
* Accepts: open TCP stream of session
* user's host name
* flags
* Returns: SSL stream if success else NIL
*/
static SSLSTREAM *ssl_start (TCPSTREAM *tstream,char *host,unsigned long flags)
{
SECURITY_STATUS e;
ULONG a;
TimeStamp t;
SecBuffer ibuf[2],obuf[1];
SecBufferDesc ibufs,obufs;
SCHANNEL_CRED tlscred;
CERT_CONTEXT *cert = NIL;
CERT_CHAIN_PARA chparam;
CERT_CHAIN_CONTEXT *chain;
SSL_EXTRA_CERT_CHAIN_POLICY_PARA policy;
CERT_CHAIN_POLICY_PARA polparam;
CERT_CHAIN_POLICY_STATUS status;
char tmp[MAILTMPLEN],certname[256];
char *reason = NIL;
ULONG req = ISC_REQ_REPLAY_DETECT | ISC_REQ_SEQUENCE_DETECT |
ISC_REQ_CONFIDENTIALITY | ISC_REQ_USE_SESSION_KEY |
ISC_REQ_ALLOCATE_MEMORY | ISC_REQ_STREAM | ISC_REQ_EXTENDED_ERROR |
ISC_REQ_MANUAL_CRED_VALIDATION;
LPSTR usage[] = {
szOID_PKIX_KP_SERVER_AUTH,
szOID_SERVER_GATED_CRYPTO,
szOID_SGC_NETSCAPE
};
PWSTR whost = NIL;
char *buf = (char *) fs_get (ssltsz);
unsigned long size = 0;
sslcertificatequery_t scq =
(sslcertificatequery_t) mail_parameters (NIL,GET_SSLCERTIFICATEQUERY,NIL);
sslfailure_t sf = (sslfailure_t) mail_parameters (NIL,GET_SSLFAILURE,NIL);
SSLSTREAM *stream = (SSLSTREAM *) memset (fs_get (sizeof (SSLSTREAM)),0,
sizeof (SSLSTREAM));
stream->tcpstream = tstream; /* bind TCP stream */
/* initialize TLS credential */
memset (&tlscred,0,sizeof (SCHANNEL_CRED));
tlscred.dwVersion = SCHANNEL_CRED_VERSION;
tlscred.grbitEnabledProtocols = SP_PROT_TLS1;
/* acquire credentials */
if (sft->AcquireCredentialsHandle
(NIL,UNISP_NAME,SECPKG_CRED_OUTBOUND,NIL,(flags & NET_TLSCLIENT) ?
&tlscred : NIL,NIL,NIL,&stream->cred,&t)
!= SEC_E_OK) reason = "Acquire credentials handle failed";
else while (!reason) { /* negotiate security context */
/* initialize buffers */
ibuf[0].cbBuffer = size; ibuf[0].pvBuffer = buf;
ibuf[1].cbBuffer = 0; ibuf[1].pvBuffer = NIL;
obuf[0].cbBuffer = 0; obuf[0].pvBuffer = NIL;
ibuf[0].BufferType = obuf[0].BufferType = SECBUFFER_TOKEN;
ibuf[1].BufferType = SECBUFFER_EMPTY;
/* initialize buffer descriptors */
ibufs.ulVersion = obufs.ulVersion = SECBUFFER_VERSION;
ibufs.cBuffers = 2; obufs.cBuffers = 1;
ibufs.pBuffers = ibuf; obufs.pBuffers = obuf;
/* negotiate security */
e = sft->InitializeSecurityContext
(&stream->cred,size ? &stream->context : NIL,host,req,0,
SECURITY_NETWORK_DREP,size? &ibufs:NIL,0,&stream->context,&obufs,&a,&t);
/* have an output buffer we need to send? */
if (obuf[0].pvBuffer && obuf[0].cbBuffer) {
if (!tcp_sout (stream->tcpstream,obuf[0].pvBuffer,obuf[0].cbBuffer))
reason = "Unexpected TCP output disconnect";
/* free the buffer */
sft->FreeContextBuffer (obuf[0].pvBuffer);
}
if (!reason) switch (e) { /* negotiation state */
case SEC_I_INCOMPLETE_CREDENTIALS:
break; /* server wants client auth */
case SEC_I_CONTINUE_NEEDED:
if (size) { /* continue, read any data? */
/* yes, anything regurgiated back to us? */
if (ibuf[1].BufferType == SECBUFFER_EXTRA) {
/* yes, set this as the new data */
memmove (buf,buf + size - ibuf[1].cbBuffer,ibuf[1].cbBuffer);
size = ibuf[1].cbBuffer;
break;
}
size = 0; /* otherwise, read more stuff from server */
}
case SEC_E_INCOMPLETE_MESSAGE:
/* need to read more data from server */
if (!tcp_getdata (stream->tcpstream))
reason = "Unexpected TCP input disconnect";
else {
memcpy (buf+size,stream->tcpstream->iptr,stream->tcpstream->ictr);
size += stream->tcpstream->ictr;
/* empty it from TCP's buffers */
stream->tcpstream->iptr += stream->tcpstream->ictr;
stream->tcpstream->ictr = 0;
}
break;
case SEC_E_OK: /* success, any data to be regurgitated? */
if (ibuf[1].BufferType == SECBUFFER_EXTRA) {
/* yes, set this as the new data */
memmove (stream->tcpstream->iptr = stream->tcpstream->ibuf,
buf + size - ibuf[1].cbBuffer,ibuf[1].cbBuffer);
stream->tcpstream->ictr = ibuf[1].cbBuffer;
}
if (certNameToStr && !(flags & NET_NOVALIDATECERT)) {
/* need validation, make wchar of host */
if (!((size = MultiByteToWideChar (CP_ACP,0,host,-1,NIL,0)) &&
(whost = (PWSTR) fs_get (size*sizeof (WCHAR))) &&
MultiByteToWideChar (CP_ACP,0,host,-1,whost,size)))
fatal ("Can't make wchar of host name!");
/* get certificate */
if ((sft->QueryContextAttributes
(&stream->context,SECPKG_ATTR_REMOTE_CERT_CONTEXT,&cert) !=
SEC_E_OK) || !cert) {
reason = "*Unable to get certificate";
strcpy (certname,"<no certificate>");
}
else { /* get certificate subject name */
(*certNameToStr) (X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
&cert->pCertInfo->Subject,CERT_X500_NAME_STR,
certname,255);
/* build certificate chain */
memset (&chparam,0,sizeof (chparam));
chparam.cbSize = sizeof (chparam);
chparam.RequestedUsage.dwType = USAGE_MATCH_TYPE_OR;
chparam.RequestedUsage.Usage.rgpszUsageIdentifier = usage;
chparam.RequestedUsage.Usage.cUsageIdentifier =
sizeof (usage) / sizeof (LPSTR);
if (!(*certGetCertificateChain)
(NIL,cert,NIL,cert->hCertStore,&chparam,NIL,NIL,&chain))
reason = ssl_analyze_status (GetLastError (),tmp);
else { /* validate certificate chain */
memset (&policy,0,sizeof (SSL_EXTRA_CERT_CHAIN_POLICY_PARA));
policy.cbStruct = sizeof (SSL_EXTRA_CERT_CHAIN_POLICY_PARA);
policy.dwAuthType = AUTHTYPE_SERVER;
policy.fdwChecks = NIL;
policy.pwszServerName = whost;
memset (&polparam,0,sizeof (polparam));
polparam.cbSize = sizeof (polparam);
polparam.pvExtraPolicyPara = &policy;
memset (&status,0,sizeof (status));
status.cbSize = sizeof (status);
if (!(*certVerifyCertificateChainPolicy)
(CERT_CHAIN_POLICY_SSL,chain,&polparam,&status))
reason = ssl_analyze_status (GetLastError (),tmp);
else if (status.dwError)
reason = ssl_analyze_status (status.dwError,tmp);
(*certFreeCertificateChain) (chain);
}
(*certFreeCertificateContext) (cert);
}
if (whost) fs_give ((void **) &whost);
if (reason) { /* got an error? */
/* application callback */
if (scq) reason = (*scq) ((*reason == '*') ? reason + 1 : reason,
host,certname) ? NIL : "";
else if (*certname) { /* error message to return via mm_log() */
sprintf (buf,"*%.128s: %.255s",
(*reason == '*') ? reason + 1 : reason,certname);
reason = buf;
}
}
}
if (reason ||
(reason = ssl_analyze_status
(sft->QueryContextAttributes
(&stream->context,SECPKG_ATTR_STREAM_SIZES,&stream->sizes),buf)))
break; /* error in certificate or getting sizes */
fs_give ((void **) &buf); /* flush temporary buffer */
/* make maximum-sized buffers */
stream->bufsize = stream->sizes.cbHeader +
stream->sizes.cbMaximumMessage + stream->sizes.cbTrailer;
if (stream->sizes.cbMaximumMessage < SSLBUFLEN)
fatal ("cbMaximumMessage is less than SSLBUFLEN!");
else if (stream->sizes.cbMaximumMessage < 16384) {
sprintf (tmp,"WINDOWS BUG: cbMaximumMessage = %ld, should be 16384",
(long) stream->sizes.cbMaximumMessage);
mm_log (tmp,NIL);
}
stream->ibuf = (char *) fs_get (stream->bufsize);
stream->obuf = (char *) fs_get (stream->bufsize);
return stream;
default:
reason = ssl_analyze_status (e,buf);
}
}
ssl_close (stream); /* failed to do SSL */
stream = NIL; /* no stream returned */
switch (*reason) { /* analyze reason */
case '*': /* certificate failure */
++reason; /* skip over certificate failure indication */
/* pass to error callback */
if (sf) (*sf) (host,reason,flags);
else { /* no error callback, build error message */
sprintf (tmp,"Certificate failure for %.80s: %.512s",host,reason);
mm_log (tmp,ERROR);
}
case '\0': /* user answered no to certificate callback */
if (flags & NET_TRYSSL) /* return dummy stream to stop tryssl */
stream = (SSLSTREAM *) memset (fs_get (sizeof (SSLSTREAM)),0,
sizeof (SSLSTREAM));
break;
default: /* non-certificate failure */
if (flags & NET_TRYSSL); /* no error output if tryssl */
/* pass to error callback */
else if (sf) (*sf) (host,reason,flags);
else { /* no error callback, build error message */
sprintf (tmp,"TLS/SSL failure for %.80s: %.512s",host,reason);
mm_log (tmp,ERROR);
}
break;
}
fs_give ((void **) &buf); /* flush temporary buffer */
return stream;
}
/* Generate error text from SSL error code
* Accepts: SSL status
* scratch buffer
* Returns: text if error status, else NIL
*/
static char *ssl_analyze_status (SECURITY_STATUS err,char *buf)
{
switch (err) {
case SEC_E_OK: /* no error */
case SEC_I_CONTINUE_NEEDED:
case SEC_I_INCOMPLETE_CREDENTIALS:
case SEC_E_INCOMPLETE_MESSAGE:
return NIL;
case SEC_E_NO_AUTHENTICATING_AUTHORITY:
mm_log ("unexpected SEC_E_NO_AUTHENTICATING_AUTHORITY",NIL);
return "*No authority could be contacted for authentication";
case SEC_E_WRONG_PRINCIPAL:
mm_log ("unexpected SEC_E_WRONG_PRINCIPAL",NIL);
case CERT_E_CN_NO_MATCH:
return "*Server name does not match certificate";
case SEC_E_UNTRUSTED_ROOT:
mm_log ("unexpected SEC_E_UNTRUSTED_ROOT",NIL);
case CERT_E_UNTRUSTEDROOT:
return "*Self-signed certificate or untrusted authority";
case SEC_E_CERT_EXPIRED:
mm_log ("unexpected SEC_E_CERT_EXPIRED",NIL);
case CERT_E_EXPIRED:
return "*Certificate has expired";
case CERT_E_REVOKED:
return "*Certificate revoked";
case SEC_E_INVALID_TOKEN:
return "Invalid token, probably not an SSL server";
case SEC_E_UNSUPPORTED_FUNCTION:
return "SSL not supported on this machine - upgrade your system software";
}
sprintf (buf,"Unexpected SSPI or certificate error %lx - report this",err);
return buf;
}
/* SSL receive line
* Accepts: SSL stream
* Returns: text line string or NIL if failure
*/
char *ssl_getline (SSLSTREAM *stream)
{
unsigned long n,contd;
char *ret = ssl_getline_work (stream,&n,&contd);
if (ret && contd) { /* got a line needing continuation? */
STRINGLIST *stl = mail_newstringlist ();
STRINGLIST *stc = stl;
do { /* collect additional lines */
stc->text.data = (unsigned char *) ret;
stc->text.size = n;
stc = stc->next = mail_newstringlist ();
ret = ssl_getline_work (stream,&n,&contd);
} while (ret && contd);
if (ret) { /* stash final part of line on list */
stc->text.data = (unsigned char *) ret;
stc->text.size = n;
/* determine how large a buffer we need */
for (n = 0, stc = stl; stc; stc = stc->next) n += stc->text.size;
ret = fs_get (n + 1); /* copy parts into buffer */
for (n = 0, stc = stl; stc; n += stc->text.size, stc = stc->next)
memcpy (ret + n,stc->text.data,stc->text.size);
ret[n] = '\0';
}
mail_free_stringlist (&stl);/* either way, done with list */
}
return ret;
}
/* SSL receive line or partial line
* Accepts: SSL stream
* pointer to return size
* pointer to return continuation flag
* Returns: text line string, size and continuation flag, or NIL if failure
*/
static char *ssl_getline_work (SSLSTREAM *stream,unsigned long *size,
long *contd)
{
unsigned long n;
char *s,*ret,c,d;
*contd = NIL; /* assume no continuation */
/* make sure have data */
if (!ssl_getdata (stream)) return NIL;
for (s = stream->iptr, n = 0, c = '\0'; stream->ictr--; n++, c = d) {
d = *stream->iptr++; /* slurp another character */
if ((c == '\015') && (d == '\012')) {
ret = (char *) fs_get (n--);
memcpy (ret,s,*size = n); /* copy into a free storage string */
ret[n] = '\0'; /* tie off string with null */
return ret;
}
}
/* copy partial string from buffer */
memcpy ((ret = (char *) fs_get (n)),s,*size = n);
/* get more data from the net */
if (!ssl_getdata (stream)) fs_give ((void **) &ret);
/* special case of newline broken by buffer */
else if ((c == '\015') && (*stream->iptr == '\012')) {
stream->iptr++; /* eat the line feed */
stream->ictr--;
ret[*size = --n] = '\0'; /* tie off string with null */
}
else *contd = LONGT; /* continuation needed */
return ret;
}
/* SSL receive buffer
* Accepts: SSL stream
* size in bytes
* buffer to read into
* Returns: T if success, NIL otherwise
*/
long ssl_getbuffer (SSLSTREAM *stream,unsigned long size,char *buffer)
{
unsigned long n;
while (size > 0) { /* until request satisfied */
if (!ssl_getdata (stream)) return NIL;
n = min (size,stream->ictr);/* number of bytes to transfer */
/* do the copy */
memcpy (buffer,stream->iptr,n);
buffer += n; /* update pointer */
stream->iptr += n;
size -= n; /* update # of bytes to do */
stream->ictr -= n;
}
buffer[0] = '\0'; /* tie off string */
return T;
}
/* SSL receive data
* Accepts: TCP/IP stream
* Returns: T if success, NIL otherwise
*/
long ssl_getdata (SSLSTREAM *stream)
{
while (stream->ictr < 1) { /* decrypted buffer empty? */
SECURITY_STATUS status;
SecBuffer buf[4];
SecBufferDesc msg;
size_t i;
size_t n = 0; /* initially no bytes to decrypt */
do { /* yes, make sure have data from TCP */
if (stream->iextractr) { /* have previous unread data? */
memcpy (stream->ibuf + n,stream->iextraptr,stream->iextractr);
n += stream->iextractr; /* update number of bytes read */
stream->iextractr = 0; /* no more extra data */
}
else { /* read from TCP */
if (!tcp_getdata (stream->tcpstream)) return ssl_abort (stream);
/* maximum amount of data to copy */
if (!(i = min (stream->bufsize - n,stream->tcpstream->ictr)))
fatal ("incomplete SecBuffer exceeds maximum buffer size");
/* do the copy */
memcpy (stream->ibuf + n,stream->tcpstream->iptr,i);
stream->tcpstream->iptr += i;
stream->tcpstream->ictr -= i;
n += i; /* update number of bytes to decrypt */
}
buf[0].cbBuffer = n; /* first SecBuffer gets data */
buf[0].pvBuffer = stream->ibuf;
buf[0].BufferType = SECBUFFER_DATA;
/* subsequent ones are for spares */
buf[1].BufferType = buf[2].BufferType = buf[3].BufferType =
SECBUFFER_EMPTY;
msg.ulVersion = SECBUFFER_VERSION;
msg.cBuffers = 4; /* number of SecBuffers */
msg.pBuffers = buf; /* first SecBuffer */
} while ((status = ((DECRYPT_MESSAGE_FN) sft->Reserved4)
(&stream->context,&msg,0,NIL)) == SEC_E_INCOMPLETE_MESSAGE);
switch (status) {
case SEC_E_OK: /* won */
case SEC_I_RENEGOTIATE: /* won but lost it after this buffer */
/* hunt for a buffer */
for (i = 0; (i < 4) && (buf[i].BufferType != SECBUFFER_DATA) ; i++);
if (i < 4) { /* found a buffer? */
/* yes, set up pointer and counter */
stream->iptr = buf[i].pvBuffer;
stream->ictr = buf[i].cbBuffer;
/* any unprocessed data? */
while (++i < 4) if (buf[i].BufferType == SECBUFFER_EXTRA) {
/* yes, note for next time around */
stream->iextraptr = buf[i].pvBuffer;
stream->iextractr = buf[i].cbBuffer;
}
}
break;
default: /* anything else means we've lost */
return ssl_abort (stream);
}
}
return LONGT;
}
/* SSL send string as record
* Accepts: SSL stream
* string pointer
* Returns: T if success else NIL
*/
long ssl_soutr (SSLSTREAM *stream,char *string)
{
return ssl_sout (stream,string,(unsigned long) strlen (string));
}
/* SSL send string
* Accepts: SSL stream
* string pointer
* byte count
* Returns: T if success else NIL
*/
long ssl_sout (SSLSTREAM *stream,char *string,unsigned long size)
{
SecBuffer buf[4];
SecBufferDesc msg;
char *s;
size_t n;
if (!stream->tcpstream) return NIL;
/* until request satisfied */
for (s = stream->ibuf,n = 0; size;) {
/* header */
buf[0].BufferType = SECBUFFER_STREAM_HEADER;
memset (buf[0].pvBuffer = stream->obuf,0,
buf[0].cbBuffer = stream->sizes.cbHeader);
/* message (up to maximum size) */
buf[1].BufferType = SECBUFFER_DATA;
memcpy (buf[1].pvBuffer = stream->obuf + stream->sizes.cbHeader,string,
buf[1].cbBuffer = min (size,SSLBUFLEN));
/* trailer */
buf[2].BufferType = SECBUFFER_STREAM_TRAILER;
memset (buf[2].pvBuffer = ((char *) buf[1].pvBuffer) + buf[1].cbBuffer,0,
buf[2].cbBuffer = stream->sizes.cbTrailer);
/* spare */
buf[3].BufferType = SECBUFFER_EMPTY;
msg.ulVersion = SECBUFFER_VERSION;
msg.cBuffers = 4; /* number of SecBuffers */
msg.pBuffers = buf; /* first SecBuffer */
string += buf[1].cbBuffer;
size -= buf[1].cbBuffer; /* this many bytes processed */
/* encrypt and send message */
if ((((ENCRYPT_MESSAGE_FN) sft->Reserved3)
(&stream->context,0,&msg,NIL) != SEC_E_OK) ||
!tcp_sout (stream->tcpstream,stream->obuf,
buf[0].cbBuffer + buf[1].cbBuffer + buf[2].cbBuffer))
return ssl_abort (stream);/* encryption or sending failed */
}
return LONGT;
}
/* SSL close
* Accepts: SSL stream
*/
void ssl_close (SSLSTREAM *stream)
{
ssl_abort (stream); /* nuke the stream */
fs_give ((void **) &stream); /* flush the stream */
}
/* SSL abort stream
* Accepts: SSL stream
* Returns: NIL always
*/
static long ssl_abort (SSLSTREAM *stream)
{
if (stream->tcpstream) { /* close TCP stream */
sft->DeleteSecurityContext (&stream->context);
sft->FreeCredentialHandle (&stream->cred);
tcp_close (stream->tcpstream);
stream->tcpstream = NIL;
}
if (stream->ibuf) fs_give ((void **) &stream->ibuf);
if (stream->obuf) fs_give ((void **) &stream->obuf);
return NIL;
}
/* SSL get host name
* Accepts: SSL stream
* Returns: host name for this stream
*/
char *ssl_host (SSLSTREAM *stream)
{
return tcp_host (stream->tcpstream);
}
/* SSL get remote host name
* Accepts: SSL stream
* Returns: host name for this stream
*/
char *ssl_remotehost (SSLSTREAM *stream)
{
return tcp_remotehost (stream->tcpstream);
}
/* SSL return port for this stream
* Accepts: SSL stream
* Returns: port number for this stream
*/
unsigned long ssl_port (SSLSTREAM *stream)
{
return tcp_port (stream->tcpstream);
}
/* SSL get local host name
* Accepts: SSL stream
* Returns: local host name
*/
char *ssl_localhost (SSLSTREAM *stream)
{
return tcp_localhost (stream->tcpstream);
}
#include "ssl_none.c" /* currently no server support */
yuuji@gentei.org