[tls] Display cross-certificate and OCSP status messages

TLS connections will almost always create background connections to
perform cross-signed certificate downloads and OCSP checks.  There is
currently no direct visibility into which checks are taking place,
which makes troubleshooting difficult in the absence of either a
packet capture or a debug build.

Use the job progress message buffer to report the current cross-signed
certificate download or OCSP status check, where applicable.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/net/tls.c

@@ -47,6 +47,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #include <ipxe/certstore.h>
 #include <ipxe/rbg.h>
 #include <ipxe/validator.h>
+#include <ipxe/job.h>
 #include <ipxe/tls.h>
 
 /* Disambiguate the various error causes */
@@ -2570,12 +2571,31 @@ static int tls_plainstream_deliver ( struct tls_connection *tls,
 	return rc;
 }
 
+/**
+ * Report job progress
+ *
+ * @v tls		TLS connection
+ * @v progress		Progress report to fill in
+ * @ret ongoing_rc	Ongoing job status code (if known)
+ */
+static int tls_progress ( struct tls_connection *tls,
+			  struct job_progress *progress ) {
+
+	/* Return cipherstream or validator progress as applicable */
+	if ( tls_ready ( tls ) ) {
+		return job_progress ( &tls->cipherstream, progress );
+	} else {
+		return job_progress ( &tls->validator, progress );
+	}
+}
+
 /** TLS plaintext stream interface operations */
 static struct interface_operation tls_plainstream_ops[] = {
 	INTF_OP ( xfer_deliver, struct tls_connection *,
 		  tls_plainstream_deliver ),
 	INTF_OP ( xfer_window, struct tls_connection *,
 		  tls_plainstream_window ),
+	INTF_OP ( job_progress, struct tls_connection *, tls_progress ),
 	INTF_OP ( intf_close, struct tls_connection *, tls_close ),
 };
 

src/net/validator.c

@@ -40,6 +40,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 #include <ipxe/base64.h>
 #include <ipxe/crc32.h>
 #include <ipxe/ocsp.h>
+#include <ipxe/job.h>
 #include <ipxe/validator.h>
 #include <config/crypto.h>
 
@@ -49,6 +50,17 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  *
  */
 
+struct validator;
+
+/** A certificate validator action */
+struct validator_action {
+	/** Name */
+	const char *name;
+	/** Action to take upon completed transfer */
+	int ( * done ) ( struct validator *validator, const void *data,
+			 size_t len );
+};
+
 /** A certificate validator */
 struct validator {
 	/** Reference count */
@@ -67,9 +79,16 @@ struct validator {
 	struct ocsp_check *ocsp;
 	/** Data buffer */
 	struct xfer_buffer buffer;
-	/** Action to take upon completed transfer */
+
-	int ( * done ) ( struct validator *validator, const void *data,
+	/** Current action */
-			 size_t len );
+	const struct validator_action *action;
+	/** Current certificate
+	 *
+	 * This will always be present within the certificate chain
+	 * and so this pointer does not hold a reference to the
+	 * certificate.
+	 */
+	struct x509_certificate *cert;
 };
 
 /**
@@ -123,8 +142,29 @@ static void validator_finished ( struct validator *validator, int rc ) {
  *
  */
 
+/**
+ * Report job progress
+ *
+ * @v validator		Certificate validator
+ * @v progress		Progress report to fill in
+ * @ret ongoing_rc	Ongoing job status code (if known)
+ */
+static int validator_progress ( struct validator *validator,
+				struct job_progress *progress ) {
+
+	/* Report current action, if applicable */
+	if ( validator->action ) {
+		snprintf ( progress->message, sizeof ( progress->message ),
+			   "%s %s", validator->action->name,
+			   x509_name ( validator->cert ) );
+	}
+
+	return 0;
+}
+
 /** Certificate validator job control interface operations */
 static struct interface_operation validator_job_operations[] = {
+	INTF_OP ( job_progress, struct validator *, validator_progress ),
 	INTF_OP ( intf_close, struct validator *, validator_finished ),
 };
 
@@ -236,6 +276,12 @@ static int validator_append ( struct validator *validator,
 	return rc;
 }
 
+/** Cross-signing certificate download validator action */
+static const struct validator_action validator_crosscert = {
+	.name = "XCRT",
+	.done = validator_append,
+};
+
 /**
  * Start download of cross-signing certificate
  *
@@ -285,7 +331,8 @@ static int validator_start_download ( struct validator *validator,
 	       x509_name ( cert ), uri_string );
 
 	/* Set completion handler */
-	validator->done = validator_append;
+	validator->action = &validator_crosscert;
+	validator->cert = cert;
 
 	/* Open URI */
 	if ( ( rc = xfer_open_uri_string ( &validator->xfer,
@@ -350,6 +397,12 @@ static int validator_ocsp_validate ( struct validator *validator,
 	return 0;
 }
 
+/** OCSP validator action */
+static const struct validator_action validator_ocsp = {
+	.name = "OCSP",
+	.done = validator_ocsp_validate,
+};
+
 /**
  * Start OCSP check
  *
@@ -374,7 +427,8 @@ static int validator_start_ocsp ( struct validator *validator,
 	}
 
 	/* Set completion handler */
-	validator->done = validator_ocsp_validate;
+	validator->action = &validator_ocsp;
+	validator->cert = cert;
 
 	/* Open URI */
 	uri_string = validator->ocsp->uri_string;
@@ -421,9 +475,9 @@ static void validator_xfer_close ( struct validator *validator, int rc ) {
 		validator, validator_name ( validator ) );
 
 	/* Process completed download */
-	assert ( validator->done != NULL );
+	assert ( validator->action != NULL );
-	if ( ( rc = validator->done ( validator, validator->buffer.data,
+	if ( ( rc = validator->action->done ( validator, validator->buffer.data,
-				       validator->buffer.len ) ) != 0 )
+					      validator->buffer.len ) ) != 0 )
 		goto err_append;
 
 	/* Free downloaded data */