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From f525681b4f66026578bc728b864bfea3d814c29e Mon Sep 17 00:00:00 2001
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From: Jes Sorensen <jsorensen@fb.com>
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Date: Fri, 27 Mar 2020 18:31:36 -0400
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Subject: [PATCH 16/33] Add basic autoconf and framework for fsverity support
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Use the same signing key argument as is used for IMA file signing.
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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configure.ac | 19 +++++++++++++++++++
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rpmsign.c | 20 ++++++++++++++------
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sign/Makefile.am | 5 +++++
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sign/rpmsign.h | 1 +
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4 files changed, 39 insertions(+), 6 deletions(-)
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diff --git a/configure.ac b/configure.ac
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index 3c102d5eb..cc7144440 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -919,6 +919,25 @@ fi
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AM_CONDITIONAL(WITH_IMAEVM,[test "$with_imaevm" = yes])
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AC_SUBST(WITH_IMAEVM_LIB)
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+# fsverity
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+AC_ARG_WITH([fsverity], [AS_HELP_STRING([--with-fsverity],[build with fsverity support])],[],[with_fsverity=no])
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+if test "$with_fsverity" = yes ; then
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+ AC_MSG_CHECKING([libfsverity])
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+ AC_COMPILE_IFELSE(
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+ [AC_LANG_PROGRAM(
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+ [[#include <libfsverity.h>]],
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+ [[return libfsverity_sign_digest(NULL, NULL, NULL, NULL);]]
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+ )],
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+ [AC_MSG_RESULT(yes)
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+ AC_DEFINE(WITH_FSVERITY, 1, [Build with fsverity support?])
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+ WITH_FSVERITY_LIB="-lfsverity"
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+ ],
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+ [AC_MSG_ERROR([--with-fsverity given, libfsverity or libfsverity.h missing])]
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+ )
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+fi
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+AM_CONDITIONAL(WITH_FSVERITY,[test "$with_fsverity" = yes])
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+AC_SUBST(WITH_FSVERITY_LIB)
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+
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# libcap
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WITH_CAP_LIB=
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AC_ARG_WITH(cap, [AS_HELP_STRING([--with-cap],[build with capability support])],
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diff --git a/rpmsign.c b/rpmsign.c
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index e1d207da5..8861c2c59 100644
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--- a/rpmsign.c
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+++ b/rpmsign.c
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@@ -18,7 +18,7 @@ enum modes {
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static int mode = MODE_NONE;
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-#ifdef WITH_IMAEVM
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+#if defined(WITH_IMAEVM) || defined(WITH_FSVERITY)
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static int fskpass = 0;
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static char * fileSigningKey = NULL;
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#endif
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@@ -39,6 +39,13 @@ static struct poptOption signOptsTable[] = {
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{ "signfiles", '\0', (POPT_ARG_VAL|POPT_ARGFLAG_OR),
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&sargs.signflags, RPMSIGN_FLAG_IMA,
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N_("sign package(s) files"), NULL},
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+#endif
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+#ifdef WITH_FSVERITY
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+ { "signverity", '\0', (POPT_ARG_VAL|POPT_ARGFLAG_OR),
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+ &sargs.signflags, RPMSIGN_FLAG_FSVERITY,
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+ N_("generate fsverity signatures for package(s) files"), NULL},
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+#endif
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+#if defined(WITH_IMAEVM) || defined(WITH_FSVERITY)
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{ "fskpath", '\0', POPT_ARG_STRING, &fileSigningKey, 0,
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N_("use file signing key <key>"),
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N_("<key>") },
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@@ -59,7 +66,7 @@ static struct poptOption optionsTable[] = {
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POPT_TABLEEND
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};
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-#ifdef WITH_IMAEVM
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+#if defined(WITH_IMAEVM) || defined(WITH_FSVERITY)
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static char *get_fskpass(void)
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{
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struct termios flags, tmp_flags;
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@@ -106,12 +113,12 @@ static int doSign(poptContext optCon, struct rpmSignArgs *sargs)
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goto exit;
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}
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-#ifdef WITH_IMAEVM
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+#if defined(WITH_IMAEVM) || defined(WITH_FSVERITY)
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if (fileSigningKey) {
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rpmPushMacro(NULL, "_file_signing_key", NULL, fileSigningKey, RMIL_GLOBAL);
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}
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- if (sargs->signflags & RPMSIGN_FLAG_IMA) {
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+ if (sargs->signflags & (RPMSIGN_FLAG_IMA | RPMSIGN_FLAG_FSVERITY)) {
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char *fileSigningKeyPassword = NULL;
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char *key = rpmExpand("%{?_file_signing_key}", NULL);
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if (rstreq(key, "")) {
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@@ -165,8 +172,9 @@ int main(int argc, char *argv[])
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argerror(_("no arguments given"));
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}
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-#ifdef WITH_IMAEVM
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- if (fileSigningKey && !(sargs.signflags & RPMSIGN_FLAG_IMA)) {
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+#if defined(WITH_IMAEVM) || defined(WITH_FSVERITY)
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+ if (fileSigningKey &&
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+ !(sargs.signflags & (RPMSIGN_FLAG_IMA | RPMSIGN_FLAG_FSVERITY))) {
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argerror(_("--fskpath may only be specified when signing files"));
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}
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#endif
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diff --git a/sign/Makefile.am b/sign/Makefile.am
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index db774de0e..8d372915a 100644
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--- a/sign/Makefile.am
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+++ b/sign/Makefile.am
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@@ -24,3 +24,8 @@ if WITH_IMAEVM
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librpmsign_la_SOURCES += rpmsignfiles.c rpmsignfiles.h
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librpmsign_la_LIBADD += @WITH_IMAEVM_LIB@
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endif
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+
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+if WITH_FSVERITY
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+librpmsign_la_SOURCES += rpmsignverity.c rpmsignverity.h
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+librpmsign_la_LIBADD += @WITH_FSVERITY_LIB@
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+endif
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diff --git a/sign/rpmsign.h b/sign/rpmsign.h
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index 7a770d879..2b8a10a1a 100644
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--- a/sign/rpmsign.h
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+++ b/sign/rpmsign.h
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@@ -17,6 +17,7 @@ enum rpmSignFlags_e {
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RPMSIGN_FLAG_NONE = 0,
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RPMSIGN_FLAG_IMA = (1 << 0),
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RPMSIGN_FLAG_RPMV3 = (1 << 1),
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+ RPMSIGN_FLAG_FSVERITY = (1 << 2),
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};
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typedef rpmFlags rpmSignFlags;
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--
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2.27.0
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