Adding upstream version 1:9.18.19.upstream/1%9.18.19upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 294 insertions, 0 deletions

diff --git a/bin/confgen/rndc-confgen.c b/bin/confgen/rndc-confgen.c
new file mode 100644
index 0000000..8179295
--- /dev/null
+++ b/bin/confgen/rndc-confgen.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file */
+
+/**
+ * rndc-confgen generates configuration files for rndc. It can be used
+ * as a convenient alternative to writing the rndc.conf file and the
+ * corresponding controls and key statements in named.conf by hand.
+ * Alternatively, it can be run with the -a option to set up a
+ * rndc.key file and avoid the need for a rndc.conf file and a
+ * controls statement altogether.
+ */
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <isc/assertions.h>
+#include <isc/attributes.h>
+#include <isc/base64.h>
+#include <isc/buffer.h>
+#include <isc/commandline.h>
+#include <isc/file.h>
+#include <isc/mem.h>
+#include <isc/net.h>
+#include <isc/print.h>
+#include <isc/result.h>
+#include <isc/string.h>
+#include <isc/time.h>
+#include <isc/util.h>
+
+#include <dns/keyvalues.h>
+#include <dns/name.h>
+
+#include <dst/dst.h>
+
+#include <confgen/os.h>
+
+#include "keygen.h"
+#include "util.h"
+
+#define DEFAULT_KEYNAME "rndc-key"
+#define DEFAULT_SERVER	"127.0.0.1"
+#define DEFAULT_PORT	953
+
+static char program[256];
+const char *progname;
+
+bool verbose = false;
+
+const char *keyfile, *keydef;
+
+noreturn static void
+usage(int status);
+
+static void
+usage(int status) {
+	fprintf(stderr, "\
+Usage:\n\
+ %s [-a] [-b bits] [-c keyfile] [-k keyname] [-p port] \
+[-s addr] [-t chrootdir] [-u user]\n\
+  -a:		 generate just the key clause and write it to keyfile (%s)\n\
+  -A alg:	 algorithm (default hmac-sha256)\n\
+  -b bits:	 from 1 through 512, default 256; total length of the secret\n\
+  -c keyfile:	 specify an alternate key file (requires -a)\n\
+  -k keyname:	 the name as it will be used  in named.conf and rndc.conf\n\
+  -p port:	 the port named will listen on and rndc will connect to\n\
+  -q:		 suppress printing written key path\n\
+  -s addr:	 the address to which rndc should connect\n\
+  -t chrootdir:	 write a keyfile in chrootdir as well (requires -a)\n\
+  -u user:	 set the keyfile owner to \"user\" (requires -a)\n",
+		progname, keydef);
+
+	exit(status);
+}
+
+int
+main(int argc, char **argv) {
+	bool show_final_mem = false;
+	isc_buffer_t key_txtbuffer;
+	char key_txtsecret[256];
+	isc_mem_t *mctx = NULL;
+	isc_result_t result = ISC_R_SUCCESS;
+	const char *keyname = NULL;
+	const char *serveraddr = NULL;
+	dns_secalg_t alg;
+	const char *algname;
+	char *p;
+	int ch;
+	int port;
+	int keysize = -1;
+	struct in_addr addr4_dummy;
+	struct in6_addr addr6_dummy;
+	char *chrootdir = NULL;
+	char *user = NULL;
+	bool keyonly = false;
+	bool quiet = false;
+	int len;
+
+	keydef = keyfile = RNDC_KEYFILE;
+
+	result = isc_file_progname(*argv, program, sizeof(program));
+	if (result != ISC_R_SUCCESS) {
+		memmove(program, "rndc-confgen", 13);
+	}
+	progname = program;
+
+	keyname = DEFAULT_KEYNAME;
+	alg = DST_ALG_HMACSHA256;
+	serveraddr = DEFAULT_SERVER;
+	port = DEFAULT_PORT;
+
+	isc_commandline_errprint = false;
+
+	while ((ch = isc_commandline_parse(argc, argv,
+					   "aA:b:c:hk:Mmp:r:s:t:u:Vy")) != -1)
+	{
+		switch (ch) {
+		case 'a':
+			keyonly = true;
+			break;
+		case 'A':
+			algname = isc_commandline_argument;
+			alg = alg_fromtext(algname);
+			if (alg == DST_ALG_UNKNOWN) {
+				fatal("Unsupported algorithm '%s'", algname);
+			}
+			break;
+		case 'b':
+			keysize = strtol(isc_commandline_argument, &p, 10);
+			if (*p != '\0' || keysize < 0) {
+				fatal("-b requires a non-negative number");
+			}
+			break;
+		case 'c':
+			keyfile = isc_commandline_argument;
+			break;
+		case 'h':
+			usage(0);
+		case 'k':
+		case 'y': /* Compatible with rndc -y. */
+			keyname = isc_commandline_argument;
+			break;
+		case 'M':
+			isc_mem_debugging = ISC_MEM_DEBUGTRACE;
+			break;
+
+		case 'm':
+			show_final_mem = true;
+			break;
+		case 'p':
+			port = strtol(isc_commandline_argument, &p, 10);
+			if (*p != '\0' || port < 0 || port > 65535) {
+				fatal("port '%s' out of range",
+				      isc_commandline_argument);
+			}
+			break;
+		case 'q':
+			quiet = true;
+			break;
+		case 'r':
+			fatal("The -r option has been deprecated.");
+			break;
+		case 's':
+			serveraddr = isc_commandline_argument;
+			if (inet_pton(AF_INET, serveraddr, &addr4_dummy) != 1 &&
+			    inet_pton(AF_INET6, serveraddr, &addr6_dummy) != 1)
+			{
+				fatal("-s should be an IPv4 or IPv6 address");
+			}
+			break;
+		case 't':
+			chrootdir = isc_commandline_argument;
+			break;
+		case 'u':
+			user = isc_commandline_argument;
+			break;
+		case 'V':
+			verbose = true;
+			break;
+		case '?':
+			if (isc_commandline_option != '?') {
+				fprintf(stderr, "%s: invalid argument -%c\n",
+					program, isc_commandline_option);
+				usage(1);
+			} else {
+				usage(0);
+			}
+			break;
+		default:
+			fprintf(stderr, "%s: unhandled option -%c\n", program,
+				isc_commandline_option);
+			exit(1);
+		}
+	}
+
+	argc -= isc_commandline_index;
+	argv += isc_commandline_index;
+	POST(argv);
+
+	if (argc > 0) {
+		usage(1);
+	}
+
+	if (alg == DST_ALG_HMACMD5) {
+		fprintf(stderr, "warning: use of hmac-md5 for RNDC keys "
+				"is deprecated; hmac-sha256 is now "
+				"recommended.\n");
+	}
+
+	if (keysize < 0) {
+		keysize = alg_bits(alg);
+	}
+	algname = dst_hmac_algorithm_totext(alg);
+
+	isc_mem_create(&mctx);
+	isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
+
+	generate_key(mctx, alg, keysize, &key_txtbuffer);
+
+	if (keyonly) {
+		write_key_file(keyfile, chrootdir == NULL ? user : NULL,
+			       keyname, &key_txtbuffer, alg);
+		if (!quiet) {
+			printf("wrote key file \"%s\"\n", keyfile);
+		}
+
+		if (chrootdir != NULL) {
+			char *buf;
+			len = strlen(chrootdir) + strlen(keyfile) + 2;
+			buf = isc_mem_get(mctx, len);
+			snprintf(buf, len, "%s%s%s", chrootdir,
+				 (*keyfile != '/') ? "/" : "", keyfile);
+
+			write_key_file(buf, user, keyname, &key_txtbuffer, alg);
+			if (!quiet) {
+				printf("wrote key file \"%s\"\n", buf);
+			}
+			isc_mem_put(mctx, buf, len);
+		}
+	} else {
+		printf("\
+# Start of rndc.conf\n\
+key \"%s\" {\n\
+	algorithm %s;\n\
+	secret \"%.*s\";\n\
+};\n\
+\n\
+options {\n\
+	default-key \"%s\";\n\
+	default-server %s;\n\
+	default-port %d;\n\
+};\n\
+# End of rndc.conf\n\
+\n\
+# Use with the following in named.conf, adjusting the allow list as needed:\n\
+# key \"%s\" {\n\
+# 	algorithm %s;\n\
+# 	secret \"%.*s\";\n\
+# };\n\
+# \n\
+# controls {\n\
+# 	inet %s port %d\n\
+# 		allow { %s; } keys { \"%s\"; };\n\
+# };\n\
+# End of named.conf\n",
+		       keyname, algname,
+		       (int)isc_buffer_usedlength(&key_txtbuffer),
+		       (char *)isc_buffer_base(&key_txtbuffer), keyname,
+		       serveraddr, port, keyname, algname,
+		       (int)isc_buffer_usedlength(&key_txtbuffer),
+		       (char *)isc_buffer_base(&key_txtbuffer), serveraddr,
+		       port, serveraddr, keyname);
+	}
+
+	if (show_final_mem) {
+		isc_mem_stats(mctx, stderr);
+	}
+
+	isc_mem_destroy(&mctx);
+
+	return (0);
+}