* Fix a slight bug in the state-machine. This caused the client end of a

  tunnel to not pro-actively close down when failing an SSL handshake.

* Change the cert-chain callback - originally this was the same one used in
  s_client and s_server but the output's as ugly as sin, so I've prettied
  tunala's copy output up a bit (and made the output level configurable).

* Remove the superfluous "errors" from the SSL state callback - these are just
  non-blocking side-effects.

demos/tunala/cb.c

@@ -5,10 +5,15 @@
 /* For callbacks generating output, here are their file-descriptors. */
 static FILE *fp_cb_ssl_info = NULL;
 static FILE *fp_cb_ssl_verify = NULL;
+/* Output level:
+ *     0 = nothing,
+ *     1 = minimal, just errors,
+ *     2 = minimal, all steps,
+ *     3 = detail, all steps */
+static unsigned int cb_ssl_verify_level = 1;
 
 /* Other static rubbish (to mirror s_cb.c where required) */
 static int int_verify_depth = 10;
-static int int_verify_error = X509_V_OK;
 
 /* This function is largely borrowed from the one used in OpenSSL's "s_client"
  * and "s_server" utilities. */
@@ -26,12 +31,18 @@ void cb_ssl_info(SSL *s, int where, int ret)
 	str2 = SSL_state_string_long(s);
 
 	if (where & SSL_CB_LOOP)
-		fprintf(fp_cb_ssl_info, "%s:%s\n", str1, str2);
+		fprintf(fp_cb_ssl_info, "(%s) %s\n", str1, str2);
 	else if (where & SSL_CB_EXIT) {
 		if (ret == 0)
-			fprintf(fp_cb_ssl_info, "%s:failed in %s\n", str1, str2);
+			fprintf(fp_cb_ssl_info, "(%s) failed in %s\n", str1, str2);
+/* In a non-blocking model, we get a few of these "error"s simply because we're
+ * calling "reads" and "writes" on the state-machine that are virtual NOPs
+ * simply to avoid wasting the time seeing if we *should* call them. Removing
+ * this case makes the "-out_state" output a lot easier on the eye. */
+#if 0
 		else if (ret < 0)
 			fprintf(fp_cb_ssl_info, "%s:error in %s\n", str1, str2);
+#endif
 	}
 }
 
@@ -40,52 +51,65 @@ void cb_ssl_info_set_output(FILE *fp)
 	fp_cb_ssl_info = fp;
 }
 
-/* Stolen wholesale from apps/s_cb.c :-) */
+static const char *int_reason_no_issuer = "X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT";
+static const char *int_reason_not_yet = "X509_V_ERR_CERT_NOT_YET_VALID";
+static const char *int_reason_before = "X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD";
+static const char *int_reason_expired = "X509_V_ERR_CERT_HAS_EXPIRED";
+static const char *int_reason_after = "X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD";
+
+/* Stolen wholesale from apps/s_cb.c :-) And since then, mutilated ... */
 int cb_ssl_verify(int ok, X509_STORE_CTX *ctx)
 {
-	char buf[256];
+	char buf1[256]; /* Used for the subject name */
+	char buf2[256]; /* Used for the issuer name */
+	const char *reason = NULL; /* Error reason (if any) */
 	X509 *err_cert;
 	int err, depth;
-	BIO *bio;
 
-	if(!fp_cb_ssl_verify)
+	if(!fp_cb_ssl_verify || (cb_ssl_verify_level == 0))
 		return ok;
-	/* There's no <damned>FILE*</damned> version of ASN1_TIME_print */
-	bio = BIO_new_fp(fp_cb_ssl_verify, BIO_NOCLOSE);
 	err_cert = X509_STORE_CTX_get_current_cert(ctx);
 	err = X509_STORE_CTX_get_error(ctx);
 	depth = X509_STORE_CTX_get_error_depth(ctx);
 
-	X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256);
-	fprintf(fp_cb_ssl_verify, "depth=%d %s\n", depth, buf);
-	if(!ok) {
-		fprintf(fp_cb_ssl_verify,"verify error:num=%d:%s\n",err,
-			X509_verify_cert_error_string(err));
-		if((int)int_verify_depth >= depth)
-			int_verify_error = err;
-		else
-			int_verify_error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
-	}
+	buf1[0] = buf2[0] = '\0';
+	/* Fill buf1 */
+	X509_NAME_oneline(X509_get_subject_name(err_cert), buf1, 256);
+	/* Fill buf2 */
+	X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf2, 256);
 	switch (ctx->error) {
 	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
-		X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),
-				buf, 256);
-		fprintf(fp_cb_ssl_verify, "issuer= %s\n", buf);
+		reason = int_reason_no_issuer;
 		break;
 	case X509_V_ERR_CERT_NOT_YET_VALID:
+		reason = int_reason_not_yet;
+		break;
 	case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
-		fprintf(fp_cb_ssl_verify, "notBefore=");
-		ASN1_TIME_print(bio, X509_get_notBefore(ctx->current_cert));
-		fprintf(fp_cb_ssl_verify, "\n");
+		reason = int_reason_before;
 		break;
 	case X509_V_ERR_CERT_HAS_EXPIRED:
+		reason = int_reason_expired;
+		break;
 	case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
-		fprintf(fp_cb_ssl_verify, "notAfter=");
-		ASN1_TIME_print(bio, X509_get_notAfter(ctx->current_cert));
-		fprintf(fp_cb_ssl_verify, "\n");
+		reason = int_reason_after;
 		break;
 	}
-	fprintf(fp_cb_ssl_verify, "verify return:%d\n",ok);
+
+	if((cb_ssl_verify_level == 1) && ok)
+		return ok;
+	fprintf(fp_cb_ssl_verify, "chain-depth=%d, ", depth);
+	if(reason)
+		fprintf(fp_cb_ssl_verify, "error=%s\n", reason);
+	else
+		fprintf(fp_cb_ssl_verify, "error=%d\n", err);
+	if(cb_ssl_verify_level < 3)
+		return ok;
+	fprintf(fp_cb_ssl_verify, "--> subject = %s\n", buf1);
+	fprintf(fp_cb_ssl_verify, "--> issuer  = %s\n", buf2);
+	if(!ok)
+		fprintf(fp_cb_ssl_verify,"--> verify error:num=%d:%s\n",err,
+			X509_verify_cert_error_string(err));
+	fprintf(fp_cb_ssl_verify, "--> verify return:%d\n",ok);
 	return ok;
 }
 
@@ -99,5 +123,11 @@ void cb_ssl_verify_set_depth(unsigned int verify_depth)
 	int_verify_depth = verify_depth;
 }
 
+void cb_ssl_verify_set_level(unsigned int level)
+{
+	if(level < 4)
+		cb_ssl_verify_level = level;
+}
+
 #endif /* !defined(NO_OPENSSL) */
 

demos/tunala/tunala.c

@@ -99,7 +99,7 @@ static const char *def_engine_id = NULL;
 static int def_server_mode = 0;
 static const char *def_cipher_list = NULL;
 static int def_out_state = 0;
-static int def_out_verify = 0;
+static unsigned int def_out_verify = 0;
 static int def_verify_mode = 0;
 static unsigned int def_verify_depth = 10;
 
@@ -118,7 +118,7 @@ static const char *helpstring =
 " -server <0|1>          (default = 0, ie. an SSL client)\n"
 " -cipher <list>         (specifies cipher list to use)\n"
 " -out_state             (prints SSL handshake states)\n"
-" -out_verify            (prints certificate verification states)\n"
+" -out_verify <0|1|2|3>  (prints certificate verification states: def=1)\n"
 " -v_peer                (verify the peer certificate)\n"
 " -v_strict              (do not continue if peer doesn't authenticate)\n"
 " -v_once                (no verification in renegotiates)\n"
@@ -180,6 +180,20 @@ static int parse_server_mode(const char *s, int *servermode)
 	return 1;
 }
 
+static int parse_verify_level(const char *s, unsigned int *verify_level)
+{
+	unsigned long l;
+	char *temp;
+	l = strtoul(s, &temp, 10);
+	if((temp == s) || (*temp != '\0') || (l > 3)) {
+		fprintf(stderr, "Error, '%s' is an invalid value for "
+				"out_verify\n", s);
+		return 0;
+	}
+	*verify_level = (unsigned int)l;
+	return 1;
+}
+
 static int parse_verify_depth(const char *s, unsigned int *verify_depth)
 {
 	unsigned long l;
@@ -215,7 +229,7 @@ int main(int argc, char *argv[])
 	int server_mode = def_server_mode;
 	const char *cipher_list = def_cipher_list;
 	int out_state = def_out_state;
-	int out_verify = def_out_verify;
+	unsigned int out_verify = def_out_verify;
 	int verify_mode = def_verify_mode;
 	unsigned int verify_depth = def_verify_depth;
 
@@ -310,7 +324,11 @@ next_arg:
 			out_state = 1;
 			goto next_arg;
 		} else if(strcmp(*argv, "-out_verify") == 0) {
-			out_verify = 1;
+			if(argc < 2)
+				return usage("-out_verify requires an argument", 0);
+			argc--; argv++;
+			if(!parse_verify_level(*argv, &out_verify))
+				return 1;
 			goto next_arg;
 		} else if(strcmp(*argv, "-v_peer") == 0) {
 			verify_mode |= SSL_VERIFY_PEER;
@@ -570,8 +588,10 @@ static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
 		cb_ssl_info_set_output(stderr);
 
 	/* out_verify */
-	if(out_verify)
+	if(out_verify > 0) {
 		cb_ssl_verify_set_output(stderr);
+		cb_ssl_verify_set_level(out_verify);
+	}
 
 	/* verify_depth */
 	cb_ssl_verify_set_depth(verify_depth);
@@ -857,7 +877,7 @@ static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item)
 			return 0;
 	}
 	if((item->dirty_read == -1) || (item->dirty_send == -1)) {
-		if(state_machine_close_dirty(&item->sm))
+		if(!state_machine_close_dirty(&item->sm))
 			return 0;
 	}
 	return 1;

demos/tunala/tunala.h

@@ -96,6 +96,7 @@ void cb_ssl_info_set_output(FILE *fp); /* Called if output should be sent too */
 int cb_ssl_verify(int ok, X509_STORE_CTX *ctx);
 void cb_ssl_verify_set_output(FILE *fp);
 void cb_ssl_verify_set_depth(unsigned int verify_depth);
+void cb_ssl_verify_set_level(unsigned int level);
 #endif /* !defined(NO_OPENSSL) */
 #endif /* !defined(NO_BUFFER) */