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authorYves-Alexis Perez <corsac@corsac.net>2018-02-19 18:17:21 +0100
committerYves-Alexis Perez <corsac@corsac.net>2018-02-19 18:17:21 +0100
commit7793611ee71b576dd9c66dee327349fa64e38740 (patch)
treef1379ec1aed52a3c772874d4ed690b90975b9623 /src/tpm_extendpcr
parente1d78dc2faaa06e7c3f71ef674a71e4de2f0758e (diff)
downloadvyos-strongswan-7793611ee71b576dd9c66dee327349fa64e38740.tar.gz
vyos-strongswan-7793611ee71b576dd9c66dee327349fa64e38740.zip
New upstream version 5.6.2
Diffstat (limited to 'src/tpm_extendpcr')
-rw-r--r--src/tpm_extendpcr/Makefile.am14
-rw-r--r--src/tpm_extendpcr/Makefile.in769
-rw-r--r--src/tpm_extendpcr/tpm_extendpcr.c317
3 files changed, 1100 insertions, 0 deletions
diff --git a/src/tpm_extendpcr/Makefile.am b/src/tpm_extendpcr/Makefile.am
new file mode 100644
index 000000000..2e2474418
--- /dev/null
+++ b/src/tpm_extendpcr/Makefile.am
@@ -0,0 +1,14 @@
+bin_PROGRAMS = tpm_extendpcr
+
+tpm_extendpcr_SOURCES = tpm_extendpcr.c
+
+tpm_extendpcr_LDADD = \
+ $(top_builddir)/src/libstrongswan/libstrongswan.la \
+ $(top_builddir)/src/libtpmtss/libtpmtss.la
+
+tpm_extendpcr.o : $(top_builddir)/config.status
+
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+ -I$(top_srcdir)/src/libstrongswan \
+ -I$(top_srcdir)/src/libtpmtss \
+ -DIPSEC_CONFDIR=\"${sysconfdir}\"
diff --git a/src/tpm_extendpcr/Makefile.in b/src/tpm_extendpcr/Makefile.in
new file mode 100644
index 000000000..0ce681c69
--- /dev/null
+++ b/src/tpm_extendpcr/Makefile.in
@@ -0,0 +1,769 @@
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+ } \
+ ; done
+
+uninstall-binPROGRAMS:
+ @$(NORMAL_UNINSTALL)
+ @list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+ files=`for p in $$list; do echo "$$p"; done | \
+ sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+ -e 's/$$/$(EXEEXT)/' \
+ `; \
+ test -n "$$list" || exit 0; \
+ echo " ( cd '$(DESTDIR)$(bindir)' && rm -f" $$files ")"; \
+ cd "$(DESTDIR)$(bindir)" && rm -f $$files
+
+clean-binPROGRAMS:
+ @list='$(bin_PROGRAMS)'; test -n "$$list" || exit 0; \
+ echo " rm -f" $$list; \
+ rm -f $$list || exit $$?; \
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+ list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
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+.PRECIOUS: Makefile
+
+
+tpm_extendpcr.o : $(top_builddir)/config.status
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/tpm_extendpcr/tpm_extendpcr.c b/src/tpm_extendpcr/tpm_extendpcr.c
new file mode 100644
index 000000000..31d0d3d25
--- /dev/null
+++ b/src/tpm_extendpcr/tpm_extendpcr.c
@@ -0,0 +1,317 @@
+/*
+ * Copyright (C) 2017 Andreas Steffen
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <tpm_tss.h>
+
+#include <library.h>
+#include <crypto/hashers/hasher.h>
+#include <utils/debug.h>
+
+#include <syslog.h>
+#include <getopt.h>
+#include <errno.h>
+
+
+/* logging */
+static bool log_to_stderr = TRUE;
+static bool log_to_syslog = TRUE;
+static level_t default_loglevel = 1;
+
+/* global variables */
+tpm_tss_t *tpm;
+chunk_t digest;
+chunk_t pcr_value;
+
+/**
+ * logging function for tpm_extendpcr
+ */
+static void tpm_extendpcr_dbg(debug_t group, level_t level, char *fmt, ...)
+{
+ char buffer[8192];
+ char *current = buffer, *next;
+ va_list args;
+
+ if (level <= default_loglevel)
+ {
+ if (log_to_stderr)
+ {
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+ }
+ if (log_to_syslog)
+ {
+ /* write in memory buffer first */
+ va_start(args, fmt);
+ vsnprintf(buffer, sizeof(buffer), fmt, args);
+ va_end(args);
+
+ /* do a syslog with every line */
+ while (current)
+ {
+ next = strchr(current, '\n');
+ if (next)
+ {
+ *(next++) = '\0';
+ }
+ syslog(LOG_INFO, "%s\n", current);
+ current = next;
+ }
+ }
+ }
+}
+
+/**
+ * Initialize logging to stderr/syslog
+ */
+static void init_log(const char *program)
+{
+ dbg = tpm_extendpcr_dbg;
+
+ if (log_to_stderr)
+ {
+ setbuf(stderr, NULL);
+ }
+ if (log_to_syslog)
+ {
+ openlog(program, LOG_CONS | LOG_NDELAY | LOG_PID, LOG_AUTHPRIV);
+ }
+}
+
+/**
+ * @brief exit tpm_extendpcr
+ *
+ * @param status 0 = OK, -1 = general discomfort
+ */
+static void exit_tpm_extendpcr(err_t message, ...)
+{
+ int status = 0;
+
+ DESTROY_IF(tpm);
+ chunk_free(&digest);
+ chunk_free(&pcr_value);
+
+ /* print any error message to stderr */
+ if (message != NULL && *message != '\0')
+ {
+ va_list args;
+ char m[8192];
+
+ va_start(args, message);
+ vsnprintf(m, sizeof(m), message, args);
+ va_end(args);
+
+ fprintf(stderr, "tpm_extendpcr error: %s\n", m);
+ status = -1;
+ }
+ library_deinit();
+ exit(status);
+}
+
+/**
+ * @brief prints the usage of the program to the stderr output
+ *
+ * If message is set, program is exited with 1 (error)
+ * @param message message in case of an error
+ */
+static void usage(const char *message)
+{
+ fprintf(stderr,
+ "Usage: tpm_extendpcr [--alg <name>] --pcr <nr> --digest <hex>|--in"
+ " <file>\n"
+ " [--hash] [--out <file>] [--quiet]"
+ " [--debug <level>]\n"
+ " tpm_extendpcr --help\n"
+ "\n"
+ "Options:\n"
+ " --alg (-a) hash algorithm (sha1|sha256)\n"
+ " --pcr (-p) platform configuration register (0..23)\n"
+ " --digest (-d) digest in hex format to be extended\n"
+ " --in (-i) binary input file with digest to be extended\n"
+ " --hash (-x) prehash the input file to create digest\n"
+ " --out (-o) binary output file with updated PCR value\n"
+ " --help (-h) show usage and exit\n"
+ "\n"
+ "Debugging output:\n"
+ " --debug (-l) changes the log level (-1..4, default: 1)\n"
+ " --quiet (-q) do not write log output to stderr\n"
+ );
+ exit_tpm_extendpcr(message);
+}
+
+/**
+ * @brief main of tpm_extendpcr which extends digest into a PCR
+ *
+ * @param argc number of arguments
+ * @param argv pointer to the argument values
+ */
+int main(int argc, char *argv[])
+{
+ hash_algorithm_t alg = HASH_SHA1;
+ hasher_t *hasher = NULL;
+ char *infile = NULL, *outfile = NULL;
+ uint32_t pcr = 16;
+ bool hash = FALSE;
+
+ atexit(library_deinit);
+ if (!library_init(NULL, "tpm_extendpcr"))
+ {
+ exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
+ }
+ if (lib->integrity &&
+ !lib->integrity->check_file(lib->integrity, "tpm_extendpcr", argv[0]))
+ {
+ fprintf(stderr, "integrity check of tpm_extendpcr failed\n");
+ exit(SS_RC_DAEMON_INTEGRITY);
+ }
+
+ for (;;)
+ {
+ static const struct option long_opts[] = {
+ /* name, has_arg, flag, val */
+ { "help", no_argument, NULL, 'h' },
+ { "alg", required_argument, NULL, 'a' },
+ { "pcr", required_argument, NULL, 'p' },
+ { "digest", required_argument, NULL, 'd' },
+ { "in", required_argument, NULL, 'i' },
+ { "hash", no_argument, NULL, 'x' },
+ { "out", required_argument, NULL, 'o' },
+ { "quiet", no_argument, NULL, 'q' },
+ { "debug", required_argument, NULL, 'l' },
+ { 0,0,0,0 }
+ };
+
+ /* parse next option */
+ int c = getopt_long(argc, argv, "ha:p:d:i:xo:ql:", long_opts, NULL);
+
+ switch (c)
+ {
+ case EOF: /* end of flags */
+ break;
+
+ case 'h': /* --help */
+ usage(NULL);
+
+ case 'a': /* --alg <name> */
+ if (!enum_from_name(hash_algorithm_short_names, optarg, &alg))
+ {
+ usage("unsupported hash algorithm");
+ }
+ continue;
+ case 'p': /* --pcr <nr> */
+ pcr = atoi(optarg);
+ continue;
+
+ case 'd': /* --digest <hex> */
+ digest = chunk_from_hex(chunk_from_str(optarg), NULL);
+ continue;
+
+ case 'i': /* --in <file> */
+ infile = optarg;
+ continue;
+
+ case 'x': /* --hash */
+ hash = TRUE;
+ continue;
+
+ case 'o': /* --out <file> */
+ outfile = optarg;
+ continue;
+
+ case 'q': /* --quiet */
+ log_to_stderr = FALSE;
+ continue;
+
+ case 'l': /* --debug <level> */
+ default_loglevel = atoi(optarg);
+ continue;
+
+ default:
+ usage("unknown option");
+ }
+ /* break from loop */
+ break;
+ }
+
+ init_log("tpm_extendpcr");
+
+ if (!lib->plugins->load(lib->plugins,
+ lib->settings->get_str(lib->settings, "tpm_extendpcr.load",
+ "tpm sha1 sha2")))
+ {
+ exit_tpm_extendpcr("plugin loading failed");
+ }
+
+ /* try to find a TPM */
+ tpm = tpm_tss_probe(TPM_VERSION_ANY);
+ if (!tpm)
+ {
+ exit_tpm_extendpcr("no TPM found");
+ }
+
+ /* read digest from file */
+ if (digest.len == 0)
+ {
+ chunk_t *chunk;
+
+ if (!infile)
+ {
+ exit_tpm_extendpcr("--digest or --in option required");
+ }
+ chunk = chunk_map(infile, FALSE);
+ if (!chunk)
+ {
+ exit_tpm_extendpcr("reading input file failed");
+ }
+ if (hash)
+ {
+ hasher = lib->crypto->create_hasher(lib->crypto, alg);
+ if (!hasher || !hasher->allocate_hash(hasher, *chunk, &digest))
+ {
+ DESTROY_IF(hasher);
+ chunk_unmap(chunk);
+ exit_tpm_extendpcr("prehashing infile failed");
+ }
+ hasher->destroy(hasher);
+ }
+ else
+ {
+ digest = chunk_clone(*chunk);
+ }
+ chunk_unmap(chunk);
+ }
+ DBG1(DBG_PTS, "Digest: %#B", &digest);
+
+ /* extend digest into PCR */
+ if (!tpm->extend_pcr(tpm, pcr, &pcr_value, digest, alg))
+ {
+ exit_tpm_extendpcr("extending PCR failed");
+ }
+ DBG1(DBG_PTS, "PCR %02u: %#B", pcr, &pcr_value);
+
+ /* write PCR value to file */
+ if (outfile)
+ {
+ if (!chunk_write(pcr_value, outfile, 022, TRUE))
+ {
+ DBG1(DBG_PTS, "writing '%s' failed", outfile);
+ }
+ }
+ chunk_free(&pcr_value);
+
+ exit_tpm_extendpcr(NULL);
+ return -1; /* should never be reached */
+}