#include "exim.h"
+#include "transports/smtp.h"
/* This module is compiled only when it is specifically requested in the
build-time configuration. However, some compilers don't like compiling empty
#ifdef USE_GNUTLS
#include "tls-gnu.c"
+#include "tlscert-gnu.c"
-#define ssl_xfer_buffer (current_global_tls_state->xfer_buffer)
-#define ssl_xfer_buffer_lwm (current_global_tls_state->xfer_buffer_lwm)
-#define ssl_xfer_buffer_hwm (current_global_tls_state->xfer_buffer_hwm)
-#define ssl_xfer_eof (current_global_tls_state->xfer_eof)
-#define ssl_xfer_error (current_global_tls_state->xfer_error)
+#define ssl_xfer_buffer (state_server.xfer_buffer)
+#define ssl_xfer_buffer_lwm (state_server.xfer_buffer_lwm)
+#define ssl_xfer_buffer_hwm (state_server.xfer_buffer_hwm)
+#define ssl_xfer_eof (state_server.xfer_eof)
+#define ssl_xfer_error (state_server.xfer_error)
#else
#include "tls-openssl.c"
+#include "tlscert-openssl.c"
#endif
/* Puts a character back in the input buffer. Only ever
called once.
+Only used by the server-side TLS.
Arguments:
ch the character
*************************************************/
/* Tests for a previous EOF
+Only used by the server-side TLS.
Arguments: none
Returns: non-zero if the eof flag is set
/* Tests for a previous read error, and returns with errno
restored to what it was when the error was detected.
+Only used by the server-side TLS.
>>>>> Hmm. Errno not handled yet. Where do we get it from? >>>>>
*************************************************/
/* Tests for unused chars in the TLS input buffer.
+Only used by the server-side TLS.
Arguments: none
Returns: TRUE/FALSE
#endif /* SUPPORT_TLS */
+void
+tls_modify_variables(tls_support * dest_tsp)
+{
+modify_variable(US"tls_bits", &dest_tsp->bits);
+modify_variable(US"tls_certificate_verified", &dest_tsp->certificate_verified);
+modify_variable(US"tls_cipher", &dest_tsp->cipher);
+modify_variable(US"tls_peerdn", &dest_tsp->peerdn);
+#if defined(SUPPORT_TLS) && !defined(USE_GNUTLS)
+modify_variable(US"tls_sni", &dest_tsp->sni);
+#endif
+}
+
+
+#ifdef SUPPORT_TLS
+/************************************************
+* TLS certificate name operations *
+************************************************/
+
+/* Convert an rfc4514 DN to an exim comma-sep list.
+Backslashed commas need to be replaced by doublecomma
+for Exim's list quoting. We modify the given string
+inplace.
+*/
+
+static void
+dn_to_list(uschar * dn)
+{
+uschar * cp;
+for (cp = dn; *cp; cp++)
+ if (cp[0] == '\\' && cp[1] == ',')
+ *cp++ = ',';
+}
+
+
+/* Extract fields of a given type from an RFC4514-
+format Distinguished Name. Return an Exim list.
+NOTE: We modify the supplied dn string during operation.
+
+Arguments:
+ dn Distinguished Name string
+ mod string containing optional list-sep and
+ field selector match, comma-separated
+Return:
+ allocated string with list of matching fields,
+ field type stripped
+*/
+
+uschar *
+tls_field_from_dn(uschar * dn, uschar * mod)
+{
+int insep = ',';
+uschar outsep = '\n';
+uschar * ele;
+uschar * match = NULL;
+int len;
+uschar * list = NULL;
+
+while ((ele = string_nextinlist(&mod, &insep, NULL, 0)))
+ if (ele[0] != '>')
+ match = ele; /* field tag to match */
+ else if (ele[1])
+ outsep = ele[1]; /* nondefault separator */
+
+dn_to_list(dn);
+insep = ',';
+len = Ustrlen(match);
+while ((ele = string_nextinlist(&dn, &insep, NULL, 0)))
+ if (Ustrncmp(ele, match, len) == 0 && ele[len] == '=')
+ list = string_append_listele(list, outsep, ele+len+1);
+return list;
+}
+
+
+# ifdef EXPERIMENTAL_CERTNAMES
+/* Compare a domain name with a possibly-wildcarded name. Wildcards
+are restricted to a single one, as the first element of patterns
+having at least three dot-separated elements. Case-independent.
+Return TRUE for a match
+*/
+static BOOL
+is_name_match(const uschar * name, const uschar * pat)
+{
+uschar * cp;
+return *pat == '*' /* possible wildcard match */
+ ? *++pat == '.' /* starts star, dot */
+ && !Ustrchr(++pat, '*') /* has no more stars */
+ && Ustrchr(pat, '.') /* and has another dot. */
+ && (cp = Ustrchr(name, '.'))/* The name has at least one dot */
+ && strcmpic(++cp, pat) == 0 /* and we only compare after it. */
+ : !Ustrchr(pat+1, '*')
+ && strcmpic(name, pat) == 0;
+}
+
+/* Compare a list of names with the dnsname elements
+of the Subject Alternate Name, if any, and the
+Subject otherwise.
+
+Arguments:
+ namelist names to compare
+ cert certificate
+
+Returns:
+ TRUE/FALSE
+*/
+
+BOOL
+tls_is_name_for_cert(uschar * namelist, void * cert)
+{
+uschar * altnames = tls_cert_subject_altname(cert, US"dns");
+uschar * subjdn;
+uschar * certname;
+int cmp_sep = 0;
+uschar * cmpname;
+
+if ((altnames = tls_cert_subject_altname(cert, US"dns")))
+ {
+ int alt_sep = '\n';
+ while ((cmpname = string_nextinlist(&namelist, &cmp_sep, NULL, 0)))
+ {
+ uschar * an = altnames;
+ while ((certname = string_nextinlist(&an, &alt_sep, NULL, 0)))
+ if (is_name_match(cmpname, certname))
+ return TRUE;
+ }
+ }
+
+else if ((subjdn = tls_cert_subject(cert, NULL)))
+ {
+ int sn_sep = ',';
+
+ dn_to_list(subjdn);
+ while ((cmpname = string_nextinlist(&namelist, &cmp_sep, NULL, 0)))
+ {
+ uschar * sn = subjdn;
+ while ((certname = string_nextinlist(&sn, &sn_sep, NULL, 0)))
+ if ( *certname++ == 'C'
+ && *certname++ == 'N'
+ && *certname++ == '='
+ && is_name_match(cmpname, certname)
+ )
+ return TRUE;
+ }
+ }
+return FALSE;
+}
+# endif /*EXPERIMENTAL_CERTNAMES*/
+#endif /*SUPPORT_TLS*/
+
+/* vi: aw ai sw=2
+*/
/* End of tls.c */
git://git.exim.org / exim.git / blobdiff