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authorVivek Goyal <vgoyal@redhat.com>2014-08-09 01:25:38 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 02:57:32 +0400
commit8370edea81e321b8a976969753d6b2811e6d5ed6 (patch)
tree63cac586b6502726a07534541761854709a4f48d /scripts/basic
parent05f65b5c70909ef686f865f0a85406d74d75f70f (diff)
downloadlinux-8370edea81e321b8a976969753d6b2811e6d5ed6.tar.xz
bin2c: move bin2c in scripts/basic
This patch series does not do kernel signature verification yet. I plan to post another patch series for that. Now distributions are already signing PE/COFF bzImage with PKCS7 signature I plan to parse and verify those signatures. Primary goal of this patchset is to prepare groundwork so that kernel image can be signed and signatures be verified during kexec load. This should help with two things. - It should allow kexec/kdump on secureboot enabled machines. - In general it can help even without secureboot. By being able to verify kernel image signature in kexec, it should help with avoiding module signing restrictions. Matthew Garret showed how to boot into a custom kernel, modify first kernel's memory and then jump back to old kernel and bypass any policy one wants to. This patch (of 15): Kexec wants to use bin2c and it wants to use it really early in the build process. See arch/x86/purgatory/ code in later patches. So move bin2c in scripts/basic so that it can be built very early and be usable by arch/x86/purgatory/ Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Greg Kroah-Hartman <greg@kroah.com> Cc: Dave Young <dyoung@redhat.com> Cc: WANG Chao <chaowang@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/basic')
-rw-r--r--scripts/basic/.gitignore1
-rw-r--r--scripts/basic/Makefile1
-rw-r--r--scripts/basic/bin2c.c35
3 files changed, 37 insertions, 0 deletions
diff --git a/scripts/basic/.gitignore b/scripts/basic/.gitignore
index a776371a3502..9528ec9e5adc 100644
--- a/scripts/basic/.gitignore
+++ b/scripts/basic/.gitignore
@@ -1 +1,2 @@
fixdep
+bin2c
diff --git a/scripts/basic/Makefile b/scripts/basic/Makefile
index 4fcef87bb875..afbc1cd69ac5 100644
--- a/scripts/basic/Makefile
+++ b/scripts/basic/Makefile
@@ -9,6 +9,7 @@
# fixdep: Used to generate dependency information during build process
hostprogs-y := fixdep
+hostprogs-$(CONFIG_IKCONFIG) += bin2c
always := $(hostprogs-y)
# fixdep is needed to compile other host programs
diff --git a/scripts/basic/bin2c.c b/scripts/basic/bin2c.c
new file mode 100644
index 000000000000..af187e695345
--- /dev/null
+++ b/scripts/basic/bin2c.c
@@ -0,0 +1,35 @@
+/*
+ * Unloved program to convert a binary on stdin to a C include on stdout
+ *
+ * Jan 1999 Matt Mackall <mpm@selenic.com>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+ int ch, total = 0;
+
+ if (argc > 1)
+ printf("const char %s[] %s=\n",
+ argv[1], argc > 2 ? argv[2] : "");
+
+ do {
+ printf("\t\"");
+ while ((ch = getchar()) != EOF) {
+ total++;
+ printf("\\x%02x", ch);
+ if (total % 16 == 0)
+ break;
+ }
+ printf("\"\n");
+ } while (ch != EOF);
+
+ if (argc > 1)
+ printf("\t;\n\nconst int %s_size = %d;\n", argv[1], total);
+
+ return 0;
+}