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import policycoreutils-2.9-19.el8

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CentOS Sources 2022-05-10 03:18:41 -04:00 committed by Stepan Oksanichenko
parent 4c644254d2
commit 795910f1eb
7 changed files with 1477 additions and 2 deletions
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674
SOURCES/0041-semodule-add-m-checksum-option.patch Normal file
View File

@ -0,0 +1,674 @@
From e748832819b781507903838483376d308c90ca79 Mon Sep 17 00:00:00 2001
From: Petr Lautrbach <plautrba@redhat.com>
Date: Tue, 16 Nov 2021 14:27:11 +0100
Subject: [PATCH] semodule: add -m | --checksum option
Since cil doesn't store module name and module version in module itself,
there's no simple way how to compare that installed module is the same
version as the module which is supposed to be installed. Even though the
version was not used by semodule itself, it was apparently used by some
team.
With `semodule -l --checksum` users get SHA256 hashes of modules and
could compare them with their files which is faster than installing
modules again and again.
E.g.
# time (
semodule -l --checksum | grep localmodule
/usr/libexec/selinux/hll/pp localmodule.pp | sha256sum
)
localmodule db002f64ddfa3983257b42b54da7b182c9b2e476f47880ae3494f9099e1a42bd
db002f64ddfa3983257b42b54da7b182c9b2e476f47880ae3494f9099e1a42bd -
real 0m0.876s
user 0m0.849s
sys 0m0.028s
vs
# time semodule -i localmodule.pp
real 0m6.147s
user 0m5.800s
sys 0m0.231s
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Acked-by: James Carter <jwcart2@gmail.com>
---
policycoreutils/semodule/Makefile | 2 +-
policycoreutils/semodule/semodule.8 | 6 +
policycoreutils/semodule/semodule.c | 95 ++++++++-
policycoreutils/semodule/sha256.c | 294 ++++++++++++++++++++++++++++
policycoreutils/semodule/sha256.h | 89 +++++++++
5 files changed, 480 insertions(+), 6 deletions(-)
create mode 100644 policycoreutils/semodule/sha256.c
create mode 100644 policycoreutils/semodule/sha256.h
diff --git a/policycoreutils/semodule/Makefile b/policycoreutils/semodule/Makefile
index 73801e487a76..9875ac383280 100644
--- a/policycoreutils/semodule/Makefile
+++ b/policycoreutils/semodule/Makefile
@@ -6,7 +6,7 @@ MANDIR = $(PREFIX)/share/man
CFLAGS ?= -Werror -Wall -W
override LDLIBS += -lsepol -lselinux -lsemanage
-SEMODULE_OBJS = semodule.o
+SEMODULE_OBJS = semodule.o sha256.o
all: semodule genhomedircon
diff --git a/policycoreutils/semodule/semodule.8 b/policycoreutils/semodule/semodule.8
index 18d4f708661c..3a2fb21c2481 100644
--- a/policycoreutils/semodule/semodule.8
+++ b/policycoreutils/semodule/semodule.8
@@ -95,6 +95,9 @@ only modules listed in \-\-extract after this option.
.B \-H,\-\-hll
Extract module as an HLL file. This only affects the \-\-extract option and
only modules listed in \-\-extract after this option.
+.TP
+.B \-m,\-\-checksum
+Add SHA256 checksum of modules to the list output.
.SH EXAMPLE
.nf
@@ -130,6 +133,9 @@ $ semodule \-B \-S "/tmp/var/lib/selinux"
# Write the HLL version of puppet and the CIL version of wireshark
# modules at priority 400 to the current working directory
$ semodule \-X 400 \-\-hll \-E puppet \-\-cil \-E wireshark
+# Check whether a module in "localmodule.pp" file is same as installed module "localmodule"
+$ /usr/libexec/selinux/hll/pp localmodule.pp | sha256sum
+$ semodule -l -m | grep localmodule
.fi
.SH SEE ALSO
diff --git a/policycoreutils/semodule/semodule.c b/policycoreutils/semodule/semodule.c
index a76797f505cd..300a97d735cc 100644
--- a/policycoreutils/semodule/semodule.c
+++ b/policycoreutils/semodule/semodule.c
@@ -24,6 +24,8 @@
#include <semanage/modules.h>
+#include "sha256.h"
+
enum client_modes {
NO_MODE, INSTALL_M, REMOVE_M, EXTRACT_M, CIL_M, HLL_M,
LIST_M, RELOAD, PRIORITY_M, ENABLE_M, DISABLE_M
@@ -56,6 +58,7 @@ static semanage_handle_t *sh = NULL;
static char *store;
static char *store_root;
int extract_cil = 0;
+static int checksum = 0;
extern char *optarg;
extern int optind;
@@ -146,6 +149,7 @@ static void usage(char *progname)
printf(" -S,--store-path use an alternate path for the policy store root\n");
printf(" -c, --cil extract module as cil. This only affects module extraction.\n");
printf(" -H, --hll extract module as hll. This only affects module extraction.\n");
+ printf(" -m, --checksum print module checksum (SHA256).\n");
}
/* Sets the global mode variable to new_mode, but only if no other
@@ -199,6 +203,7 @@ static void parse_command_line(int argc, char **argv)
{"disable", required_argument, NULL, 'd'},
{"path", required_argument, NULL, 'p'},
{"store-path", required_argument, NULL, 'S'},
+ {"checksum", 0, NULL, 'm'},
{NULL, 0, NULL, 0}
};
int extract_selected = 0;
@@ -209,7 +214,7 @@ static void parse_command_line(int argc, char **argv)
no_reload = 0;
priority = 400;
while ((i =
- getopt_long(argc, argv, "s:b:hi:l::vr:u:RnNBDCPX:e:d:p:S:E:cH", opts,
+ getopt_long(argc, argv, "s:b:hi:l::vr:u:RnNBDCPX:e:d:p:S:E:cHm", opts,
NULL)) != -1) {
switch (i) {
case 'b':
@@ -286,6 +291,9 @@ static void parse_command_line(int argc, char **argv)
case 'd':
set_mode(DISABLE_M, optarg);
break;
+ case 'm':
+ checksum = 1;
+ break;
case '?':
default:{
usage(argv[0]);
@@ -337,6 +345,61 @@ static void parse_command_line(int argc, char **argv)
}
}
+/* Get module checksum */
+static char *hash_module_data(const char *module_name, const int prio) {
+ semanage_module_info_t *extract_info = NULL;
+ semanage_module_key_t *modkey = NULL;
+ Sha256Context context;
+ uint8_t sha256_hash[SHA256_HASH_SIZE];
+ char *sha256_buf = NULL;
+ void *data;
+ size_t data_len = 0, i;
+ int result;
+
+ result = semanage_module_key_create(sh, &modkey);
+ if (result != 0) {
+ goto cleanup_extract;
+ }
+
+ result = semanage_module_key_set_name(sh, modkey, module_name);
+ if (result != 0) {
+ goto cleanup_extract;
+ }
+
+ result = semanage_module_key_set_priority(sh, modkey, prio);
+ if (result != 0) {
+ goto cleanup_extract;
+ }
+
+ result = semanage_module_extract(sh, modkey, 1, &data, &data_len,
+ &extract_info);
+ if (result != 0) {
+ goto cleanup_extract;
+ }
+
+ Sha256Initialise(&context);
+ Sha256Update(&context, data, data_len);
+
+ Sha256Finalise(&context, (SHA256_HASH *)sha256_hash);
+
+ sha256_buf = calloc(1, SHA256_HASH_SIZE * 2 + 1);
+
+ if (sha256_buf == NULL)
+ goto cleanup_extract;
+
+ for (i = 0; i < SHA256_HASH_SIZE; i++) {
+ sprintf((&sha256_buf[i * 2]), "%02x", sha256_hash[i]);
+ }
+ sha256_buf[i * 2] = 0;
+
+cleanup_extract:
+ semanage_module_info_destroy(sh, extract_info);
+ free(extract_info);
+ semanage_module_key_destroy(sh, modkey);
+ free(modkey);
+ return sha256_buf;
+}
+
int main(int argc, char *argv[])
{
int i, commit = 0;
@@ -544,6 +607,8 @@ cleanup_extract:
int modinfos_len = 0;
semanage_module_info_t *m = NULL;
int j = 0;
+ char *module_checksum = NULL;
+ uint16_t pri = 0;
if (verbose) {
printf
@@ -568,7 +633,18 @@ cleanup_extract:
result = semanage_module_info_get_name(sh, m, &name);
if (result != 0) goto cleanup_list;
- printf("%s\n", name);
+ result = semanage_module_info_get_priority(sh, m, &pri);
+ if (result != 0) goto cleanup_list;
+
+ printf("%s", name);
+ if (checksum) {
+ module_checksum = hash_module_data(name, pri);
+ if (module_checksum) {
+ printf(" %s", module_checksum);
+ free(module_checksum);
+ }
+ }
+ printf("\n");
}
}
else if (strcmp(mode_arg, "full") == 0) {
@@ -583,11 +659,12 @@ cleanup_extract:
}
/* calculate column widths */
- size_t column[4] = { 0, 0, 0, 0 };
+ size_t column[5] = { 0, 0, 0, 0, 0 };
/* fixed width columns */
column[0] = sizeof("000") - 1;
column[3] = sizeof("disabled") - 1;
+ column[4] = 64; /* SHA256_HASH_SIZE * 2 */
/* variable width columns */
const char *tmp = NULL;
@@ -610,7 +687,6 @@ cleanup_extract:
/* print out each module */
for (j = 0; j < modinfos_len; j++) {
- uint16_t pri = 0;
const char *name = NULL;
int enabled = 0;
const char *lang_ext = NULL;
@@ -629,11 +705,20 @@ cleanup_extract:
result = semanage_module_info_get_lang_ext(sh, m, &lang_ext);
if (result != 0) goto cleanup_list;
- printf("%0*u %-*s %-*s %-*s\n",
+ printf("%0*u %-*s %-*s %-*s",
(int)column[0], pri,
(int)column[1], name,
(int)column[2], lang_ext,
(int)column[3], enabled ? "" : "disabled");
+ if (checksum) {
+ module_checksum = hash_module_data(name, pri);
+ if (module_checksum) {
+ printf(" %-*s", (int)column[4], module_checksum);
+ free(module_checksum);
+ }
+ }
+ printf("\n");
+
}
}
else {
diff --git a/policycoreutils/semodule/sha256.c b/policycoreutils/semodule/sha256.c
new file mode 100644
index 000000000000..fe2aeef07f53
--- /dev/null
+++ b/policycoreutils/semodule/sha256.c
@@ -0,0 +1,294 @@
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// WjCryptLib_Sha256
+//
+// Implementation of SHA256 hash function.
+// Original author: Tom St Denis, tomstdenis@gmail.com, http://libtom.org
+// Modified by WaterJuice retaining Public Domain license.
+//
+// This is free and unencumbered software released into the public domain - June 2013 waterjuice.org
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// IMPORTS
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#include "sha256.h"
+#include <memory.h>
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// MACROS
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#define ror(value, bits) (((value) >> (bits)) | ((value) << (32 - (bits))))
+
+#define MIN(x, y) ( ((x)<(y))?(x):(y) )
+
+#define STORE32H(x, y) \
+ { (y)[0] = (uint8_t)(((x)>>24)&255); (y)[1] = (uint8_t)(((x)>>16)&255); \
+ (y)[2] = (uint8_t)(((x)>>8)&255); (y)[3] = (uint8_t)((x)&255); }
+
+#define LOAD32H(x, y) \
+ { x = ((uint32_t)((y)[0] & 255)<<24) | \
+ ((uint32_t)((y)[1] & 255)<<16) | \
+ ((uint32_t)((y)[2] & 255)<<8) | \
+ ((uint32_t)((y)[3] & 255)); }
+
+#define STORE64H(x, y) \
+ { (y)[0] = (uint8_t)(((x)>>56)&255); (y)[1] = (uint8_t)(((x)>>48)&255); \
+ (y)[2] = (uint8_t)(((x)>>40)&255); (y)[3] = (uint8_t)(((x)>>32)&255); \
+ (y)[4] = (uint8_t)(((x)>>24)&255); (y)[5] = (uint8_t)(((x)>>16)&255); \
+ (y)[6] = (uint8_t)(((x)>>8)&255); (y)[7] = (uint8_t)((x)&255); }
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// CONSTANTS
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+// The K array
+static const uint32_t K[64] = {
+ 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,
+ 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,
+ 0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,
+ 0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
+ 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,
+ 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,
+ 0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,
+ 0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
+ 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,
+ 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,
+ 0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,
+ 0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
+ 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
+};
+
+#define BLOCK_SIZE 64
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// INTERNAL FUNCTIONS
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+// Various logical functions
+#define Ch( x, y, z ) (z ^ (x & (y ^ z)))
+#define Maj( x, y, z ) (((x | y) & z) | (x & y))
+#define S( x, n ) ror((x),(n))
+#define R( x, n ) (((x)&0xFFFFFFFFUL)>>(n))
+#define Sigma0( x ) (S(x, 2) ^ S(x, 13) ^ S(x, 22))
+#define Sigma1( x ) (S(x, 6) ^ S(x, 11) ^ S(x, 25))
+#define Gamma0( x ) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
+#define Gamma1( x ) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
+
+#define Sha256Round( a, b, c, d, e, f, g, h, i ) \
+ t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
+ t1 = Sigma0(a) + Maj(a, b, c); \
+ d += t0; \
+ h = t0 + t1;
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// TransformFunction
+//
+// Compress 512-bits
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+static
+void
+ TransformFunction
+ (
+ Sha256Context* Context,
+ uint8_t const* Buffer
+ )
+{
+ uint32_t S[8];
+ uint32_t W[64];
+ uint32_t t0;
+ uint32_t t1;
+ uint32_t t;
+ int i;
+
+ // Copy state into S
+ for( i=0; i<8; i++ )
+ {
+ S[i] = Context->state[i];
+ }
+
+ // Copy the state into 512-bits into W[0..15]
+ for( i=0; i<16; i++ )
+ {
+ LOAD32H( W[i], Buffer + (4*i) );
+ }
+
+ // Fill W[16..63]
+ for( i=16; i<64; i++ )
+ {
+ W[i] = Gamma1( W[i-2]) + W[i-7] + Gamma0( W[i-15] ) + W[i-16];
+ }
+
+ // Compress
+ for( i=0; i<64; i++ )
+ {
+ Sha256Round( S[0], S[1], S[2], S[3], S[4], S[5], S[6], S[7], i );
+ t = S[7];
+ S[7] = S[6];
+ S[6] = S[5];
+ S[5] = S[4];
+ S[4] = S[3];
+ S[3] = S[2];
+ S[2] = S[1];
+ S[1] = S[0];
+ S[0] = t;
+ }
+
+ // Feedback
+ for( i=0; i<8; i++ )
+ {
+ Context->state[i] = Context->state[i] + S[i];
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// PUBLIC FUNCTIONS
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Initialise
+//
+// Initialises a SHA256 Context. Use this to initialise/reset a context.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Initialise
+ (
+ Sha256Context* Context // [out]
+ )
+{
+ Context->curlen = 0;
+ Context->length = 0;
+ Context->state[0] = 0x6A09E667UL;
+ Context->state[1] = 0xBB67AE85UL;
+ Context->state[2] = 0x3C6EF372UL;
+ Context->state[3] = 0xA54FF53AUL;
+ Context->state[4] = 0x510E527FUL;
+ Context->state[5] = 0x9B05688CUL;
+ Context->state[6] = 0x1F83D9ABUL;
+ Context->state[7] = 0x5BE0CD19UL;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Update
+//
+// Adds data to the SHA256 context. This will process the data and update the internal state of the context. Keep on
+// calling this function until all the data has been added. Then call Sha256Finalise to calculate the hash.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Update
+ (
+ Sha256Context* Context, // [in out]
+ void const* Buffer, // [in]
+ uint32_t BufferSize // [in]
+ )
+{
+ uint32_t n;
+
+ if( Context->curlen > sizeof(Context->buf) )
+ {
+ return;
+ }
+
+ while( BufferSize > 0 )
+ {
+ if( Context->curlen == 0 && BufferSize >= BLOCK_SIZE )
+ {
+ TransformFunction( Context, (uint8_t*)Buffer );
+ Context->length += BLOCK_SIZE * 8;
+ Buffer = (uint8_t*)Buffer + BLOCK_SIZE;
+ BufferSize -= BLOCK_SIZE;
+ }
+ else
+ {
+ n = MIN( BufferSize, (BLOCK_SIZE - Context->curlen) );
+ memcpy( Context->buf + Context->curlen, Buffer, (size_t)n );
+ Context->curlen += n;
+ Buffer = (uint8_t*)Buffer + n;
+ BufferSize -= n;
+ if( Context->curlen == BLOCK_SIZE )
+ {
+ TransformFunction( Context, Context->buf );
+ Context->length += 8*BLOCK_SIZE;
+ Context->curlen = 0;
+ }
+ }
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Finalise
+//
+// Performs the final calculation of the hash and returns the digest (32 byte buffer containing 256bit hash). After
+// calling this, Sha256Initialised must be used to reuse the context.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Finalise
+ (
+ Sha256Context* Context, // [in out]
+ SHA256_HASH* Digest // [out]
+ )
+{
+ int i;
+
+ if( Context->curlen >= sizeof(Context->buf) )
+ {
+ return;
+ }
+
+ // Increase the length of the message
+ Context->length += Context->curlen * 8;
+
+ // Append the '1' bit
+ Context->buf[Context->curlen++] = (uint8_t)0x80;
+
+ // if the length is currently above 56 bytes we append zeros
+ // then compress. Then we can fall back to padding zeros and length
+ // encoding like normal.
+ if( Context->curlen > 56 )
+ {
+ while( Context->curlen < 64 )
+ {
+ Context->buf[Context->curlen++] = (uint8_t)0;
+ }
+ TransformFunction(Context, Context->buf);
+ Context->curlen = 0;
+ }
+
+ // Pad up to 56 bytes of zeroes
+ while( Context->curlen < 56 )
+ {
+ Context->buf[Context->curlen++] = (uint8_t)0;
+ }
+
+ // Store length
+ STORE64H( Context->length, Context->buf+56 );
+ TransformFunction( Context, Context->buf );
+
+ // Copy output
+ for( i=0; i<8; i++ )
+ {
+ STORE32H( Context->state[i], Digest->bytes+(4*i) );
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Calculate
+//
+// Combines Sha256Initialise, Sha256Update, and Sha256Finalise into one function. Calculates the SHA256 hash of the
+// buffer.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Calculate
+ (
+ void const* Buffer, // [in]
+ uint32_t BufferSize, // [in]
+ SHA256_HASH* Digest // [in]
+ )
+{
+ Sha256Context context;
+
+ Sha256Initialise( &context );
+ Sha256Update( &context, Buffer, BufferSize );
+ Sha256Finalise( &context, Digest );
+}
diff --git a/policycoreutils/semodule/sha256.h b/policycoreutils/semodule/sha256.h
new file mode 100644
index 000000000000..406ed869cd82
--- /dev/null
+++ b/policycoreutils/semodule/sha256.h
@@ -0,0 +1,89 @@
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// WjCryptLib_Sha256
+//
+// Implementation of SHA256 hash function.
+// Original author: Tom St Denis, tomstdenis@gmail.com, http://libtom.org
+// Modified by WaterJuice retaining Public Domain license.
+//
+// This is free and unencumbered software released into the public domain - June 2013 waterjuice.org
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// IMPORTS
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#include <stdint.h>
+#include <stdio.h>
+
+typedef struct
+{
+ uint64_t length;
+ uint32_t state[8];
+ uint32_t curlen;
+ uint8_t buf[64];
+} Sha256Context;
+
+#define SHA256_HASH_SIZE ( 256 / 8 )
+
+typedef struct
+{
+ uint8_t bytes [SHA256_HASH_SIZE];
+} SHA256_HASH;
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// PUBLIC FUNCTIONS
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Initialise
+//
+// Initialises a SHA256 Context. Use this to initialise/reset a context.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Initialise
+ (
+ Sha256Context* Context // [out]
+ );
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Update
+//
+// Adds data to the SHA256 context. This will process the data and update the internal state of the context. Keep on
+// calling this function until all the data has been added. Then call Sha256Finalise to calculate the hash.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Update
+ (
+ Sha256Context* Context, // [in out]
+ void const* Buffer, // [in]
+ uint32_t BufferSize // [in]
+ );
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Finalise
+//
+// Performs the final calculation of the hash and returns the digest (32 byte buffer containing 256bit hash). After
+// calling this, Sha256Initialised must be used to reuse the context.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Finalise
+ (
+ Sha256Context* Context, // [in out]
+ SHA256_HASH* Digest // [out]
+ );
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Sha256Calculate
+//
+// Combines Sha256Initialise, Sha256Update, and Sha256Finalise into one function. Calculates the SHA256 hash of the
+// buffer.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+void
+ Sha256Calculate
+ (
+ void const* Buffer, // [in]
+ uint32_t BufferSize, // [in]
+ SHA256_HASH* Digest // [in]
+ );
--
2.33.1

29
SOURCES/0042-semodule-Fix-lang_ext-column-index.patch Normal file
View File

@ -0,0 +1,29 @@
From 14084bad4f5bcfdb769ba39c9a6f12e4787ab909 Mon Sep 17 00:00:00 2001
From: Petr Lautrbach <plautrba@redhat.com>
Date: Tue, 16 Nov 2021 16:11:22 +0100
Subject: [PATCH] semodule: Fix lang_ext column index
lang_ext is 3. column - index number 2.
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Acked-by: James Carter <jwcart2@gmail.com>
---
policycoreutils/semodule/semodule.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/policycoreutils/semodule/semodule.c b/policycoreutils/semodule/semodule.c
index 300a97d735cc..c677cc4f1d81 100644
--- a/policycoreutils/semodule/semodule.c
+++ b/policycoreutils/semodule/semodule.c
@@ -682,7 +682,7 @@ cleanup_extract:
if (result != 0) goto cleanup_list;
size = strlen(tmp);
- if (size > column[3]) column[3] = size;
+ if (size > column[2]) column[2] = size;
}
/* print out each module */
--
2.33.1

32
SOURCES/0043-semodule-Don-t-forget-to-munmap-data.patch Normal file
View File

@ -0,0 +1,32 @@
From 61f05b6d26063e1ebdc06609c29a067d44579b41 Mon Sep 17 00:00:00 2001
From: Petr Lautrbach <plautrba@redhat.com>
Date: Tue, 23 Nov 2021 17:38:51 +0100
Subject: [PATCH] semodule: Don't forget to munmap() data
semanage_module_extract() mmap()'s the module raw data but it leaves on
the caller to munmap() them.
Reported-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Acked-by: James Carter <jwcart2@gmail.com>
---
policycoreutils/semodule/semodule.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/policycoreutils/semodule/semodule.c b/policycoreutils/semodule/semodule.c
index c677cc4f1d81..dc227058b073 100644
--- a/policycoreutils/semodule/semodule.c
+++ b/policycoreutils/semodule/semodule.c
@@ -393,6 +393,9 @@ static char *hash_module_data(const char *module_name, const int prio) {
sha256_buf[i * 2] = 0;
cleanup_extract:
+ if (data_len > 0) {
+ munmap(data, data_len);
+ }
semanage_module_info_destroy(sh, extract_info);
free(extract_info);
semanage_module_key_destroy(sh, modkey);
--
2.33.1

41
SOURCES/0044-policycoreutils-Improve-error-message-when-selabel_o.patch Normal file
View File

@ -0,0 +1,41 @@
From 69da6239d8505a9d6ca547187f71a351df17f157 Mon Sep 17 00:00:00 2001
From: Vit Mojzis <vmojzis@redhat.com>
Date: Mon, 10 Jan 2022 18:35:27 +0100
Subject: [PATCH] policycoreutils: Improve error message when selabel_open
fails
When selabel_open fails to locate file_context files and
selabel_opt_path is not specified (e.g. when the policy type is
missconfigured in /etc/selinux/config), perror only prints
"No such file or directory".
This can be confusing in case of "restorecon" since it's
not apparent that the issue is in policy store.
Before:
\# restorecon -v /tmp/foo.txt
No such file or directory
After:
\# restorecon -v /tmp/foo.txt
/etc/selinux/yolo/contexts/files/file_contexts: No such file or directory
Signed-off-by: Vit Mojzis <vmojzis@redhat.com>
---
policycoreutils/setfiles/restore.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/policycoreutils/setfiles/restore.c b/policycoreutils/setfiles/restore.c
index d3335d1a..ba2668b3 100644
--- a/policycoreutils/setfiles/restore.c
+++ b/policycoreutils/setfiles/restore.c
@@ -29,7 +29,7 @@ void restore_init(struct restore_opts *opts)
opts->hnd = selabel_open(SELABEL_CTX_FILE, selinux_opts, 3);
if (!opts->hnd) {
- perror(opts->selabel_opt_path);
+ perror(opts->selabel_opt_path ? opts->selabel_opt_path : selinux_file_context_path());
exit(1);
}
--
2.30.2

539
SOURCES/0045-semodule-libsemanage-move-module-hashing-into-libsem.patch Normal file
View File

@ -0,0 +1,539 @@
From 066007029b3dd250305d7fac0bfd53aa1e4543cf Mon Sep 17 00:00:00 2001
From: Ondrej Mosnacek <omosnace@redhat.com>
Date: Thu, 3 Feb 2022 17:53:23 +0100
Subject: [PATCH] semodule,libsemanage: move module hashing into libsemanage
The main goal of this move is to have the SHA-256 implementation under
libsemanage, since upcoming patches will make use of SHA-256 for a
different (but similar) purpose in libsemanage. Having the hashing code
in libsemanage will reduce code duplication and allow for easier hash
algorithm upgrade in the future.
Note that libselinux currently also contains a hash function
implementation (for yet another different purpose). This patch doesn't
make any effort to address that duplicity yet.
This patch also changes the format of the hash string printed by
semodule to include the name of the hash. The intent is to avoid
ambiguity and potential collisions when the algorithm is potentially
changed in the future.
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
---
policycoreutils/semodule/Makefile | 2 +-
policycoreutils/semodule/semodule.c | 53 ++---
policycoreutils/semodule/sha256.c | 294 ----------------------------
policycoreutils/semodule/sha256.h | 89 ---------
4 files changed, 17 insertions(+), 421 deletions(-)
delete mode 100644 policycoreutils/semodule/sha256.c
delete mode 100644 policycoreutils/semodule/sha256.h
diff --git a/policycoreutils/semodule/Makefile b/policycoreutils/semodule/Makefile
index 9875ac38..73801e48 100644
--- a/policycoreutils/semodule/Makefile
+++ b/policycoreutils/semodule/Makefile
@@ -6,7 +6,7 @@ MANDIR = $(PREFIX)/share/man
CFLAGS ?= -Werror -Wall -W
override LDLIBS += -lsepol -lselinux -lsemanage
-SEMODULE_OBJS = semodule.o sha256.o
+SEMODULE_OBJS = semodule.o
all: semodule genhomedircon
diff --git a/policycoreutils/semodule/semodule.c b/policycoreutils/semodule/semodule.c
index dc227058..243b1add 100644
--- a/policycoreutils/semodule/semodule.c
+++ b/policycoreutils/semodule/semodule.c
@@ -24,8 +24,6 @@
#include <semanage/modules.h>
-#include "sha256.h"
-
enum client_modes {
NO_MODE, INSTALL_M, REMOVE_M, EXTRACT_M, CIL_M, HLL_M,
LIST_M, RELOAD, PRIORITY_M, ENABLE_M, DISABLE_M
@@ -347,60 +345,38 @@ static void parse_command_line(int argc, char **argv)
/* Get module checksum */
static char *hash_module_data(const char *module_name, const int prio) {
- semanage_module_info_t *extract_info = NULL;
semanage_module_key_t *modkey = NULL;
- Sha256Context context;
- uint8_t sha256_hash[SHA256_HASH_SIZE];
- char *sha256_buf = NULL;
- void *data;
- size_t data_len = 0, i;
+ char *hash_str = NULL;
+ void *hash = NULL;
+ size_t hash_len = 0;
int result;
result = semanage_module_key_create(sh, &modkey);
if (result != 0) {
- goto cleanup_extract;
+ goto cleanup;
}
result = semanage_module_key_set_name(sh, modkey, module_name);
if (result != 0) {
- goto cleanup_extract;
+ goto cleanup;
}
result = semanage_module_key_set_priority(sh, modkey, prio);
if (result != 0) {
- goto cleanup_extract;
+ goto cleanup;
}
- result = semanage_module_extract(sh, modkey, 1, &data, &data_len,
- &extract_info);
+ result = semanage_module_compute_checksum(sh, modkey, 1, &hash_str,
+ &hash_len);
if (result != 0) {
- goto cleanup_extract;
- }
-
- Sha256Initialise(&context);
- Sha256Update(&context, data, data_len);
-
- Sha256Finalise(&context, (SHA256_HASH *)sha256_hash);
-
- sha256_buf = calloc(1, SHA256_HASH_SIZE * 2 + 1);
-
- if (sha256_buf == NULL)
- goto cleanup_extract;
-
- for (i = 0; i < SHA256_HASH_SIZE; i++) {
- sprintf((&sha256_buf[i * 2]), "%02x", sha256_hash[i]);
+ goto cleanup;
}
- sha256_buf[i * 2] = 0;
-cleanup_extract:
- if (data_len > 0) {
- munmap(data, data_len);
- }
- semanage_module_info_destroy(sh, extract_info);
- free(extract_info);
+cleanup:
+ free(hash);
semanage_module_key_destroy(sh, modkey);
free(modkey);
- return sha256_buf;
+ return hash_str;
}
int main(int argc, char *argv[])
@@ -667,7 +643,10 @@ cleanup_extract:
/* fixed width columns */
column[0] = sizeof("000") - 1;
column[3] = sizeof("disabled") - 1;
- column[4] = 64; /* SHA256_HASH_SIZE * 2 */
+
+ result = semanage_module_compute_checksum(sh, NULL, 0, NULL,
+ &column[4]);
+ if (result != 0) goto cleanup_list;
/* variable width columns */
const char *tmp = NULL;
diff --git a/policycoreutils/semodule/sha256.c b/policycoreutils/semodule/sha256.c
deleted file mode 100644
index fe2aeef0..00000000
--- a/policycoreutils/semodule/sha256.c
+++ /dev/null
@@ -1,294 +0,0 @@
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// WjCryptLib_Sha256
-//
-// Implementation of SHA256 hash function.
-// Original author: Tom St Denis, tomstdenis@gmail.com, http://libtom.org
-// Modified by WaterJuice retaining Public Domain license.
-//
-// This is free and unencumbered software released into the public domain - June 2013 waterjuice.org
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// IMPORTS
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-#include "sha256.h"
-#include <memory.h>
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// MACROS
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-#define ror(value, bits) (((value) >> (bits)) | ((value) << (32 - (bits))))
-
-#define MIN(x, y) ( ((x)<(y))?(x):(y) )
-
-#define STORE32H(x, y) \
- { (y)[0] = (uint8_t)(((x)>>24)&255); (y)[1] = (uint8_t)(((x)>>16)&255); \
- (y)[2] = (uint8_t)(((x)>>8)&255); (y)[3] = (uint8_t)((x)&255); }
-
-#define LOAD32H(x, y) \
- { x = ((uint32_t)((y)[0] & 255)<<24) | \
- ((uint32_t)((y)[1] & 255)<<16) | \
- ((uint32_t)((y)[2] & 255)<<8) | \
- ((uint32_t)((y)[3] & 255)); }
-
-#define STORE64H(x, y) \
- { (y)[0] = (uint8_t)(((x)>>56)&255); (y)[1] = (uint8_t)(((x)>>48)&255); \
- (y)[2] = (uint8_t)(((x)>>40)&255); (y)[3] = (uint8_t)(((x)>>32)&255); \
- (y)[4] = (uint8_t)(((x)>>24)&255); (y)[5] = (uint8_t)(((x)>>16)&255); \
- (y)[6] = (uint8_t)(((x)>>8)&255); (y)[7] = (uint8_t)((x)&255); }
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// CONSTANTS
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-// The K array
-static const uint32_t K[64] = {
- 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,
- 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,
- 0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,
- 0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
- 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,
- 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,
- 0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,
- 0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
- 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,
- 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,
- 0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,
- 0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
- 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
-};
-
-#define BLOCK_SIZE 64
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// INTERNAL FUNCTIONS
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-// Various logical functions
-#define Ch( x, y, z ) (z ^ (x & (y ^ z)))
-#define Maj( x, y, z ) (((x | y) & z) | (x & y))
-#define S( x, n ) ror((x),(n))
-#define R( x, n ) (((x)&0xFFFFFFFFUL)>>(n))
-#define Sigma0( x ) (S(x, 2) ^ S(x, 13) ^ S(x, 22))
-#define Sigma1( x ) (S(x, 6) ^ S(x, 11) ^ S(x, 25))
-#define Gamma0( x ) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
-#define Gamma1( x ) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
-
-#define Sha256Round( a, b, c, d, e, f, g, h, i ) \
- t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
- t1 = Sigma0(a) + Maj(a, b, c); \
- d += t0; \
- h = t0 + t1;
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// TransformFunction
-//
-// Compress 512-bits
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-static
-void
- TransformFunction
- (
- Sha256Context* Context,
- uint8_t const* Buffer
- )
-{
- uint32_t S[8];
- uint32_t W[64];
- uint32_t t0;
- uint32_t t1;
- uint32_t t;
- int i;
-
- // Copy state into S
- for( i=0; i<8; i++ )
- {
- S[i] = Context->state[i];
- }
-
- // Copy the state into 512-bits into W[0..15]
- for( i=0; i<16; i++ )
- {
- LOAD32H( W[i], Buffer + (4*i) );
- }
-
- // Fill W[16..63]
- for( i=16; i<64; i++ )
- {
- W[i] = Gamma1( W[i-2]) + W[i-7] + Gamma0( W[i-15] ) + W[i-16];
- }
-
- // Compress
- for( i=0; i<64; i++ )
- {
- Sha256Round( S[0], S[1], S[2], S[3], S[4], S[5], S[6], S[7], i );
- t = S[7];
- S[7] = S[6];
- S[6] = S[5];
- S[5] = S[4];
- S[4] = S[3];
- S[3] = S[2];
- S[2] = S[1];
- S[1] = S[0];
- S[0] = t;
- }
-
- // Feedback
- for( i=0; i<8; i++ )
- {
- Context->state[i] = Context->state[i] + S[i];
- }
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// PUBLIC FUNCTIONS
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Initialise
-//
-// Initialises a SHA256 Context. Use this to initialise/reset a context.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Initialise
- (
- Sha256Context* Context // [out]
- )
-{
- Context->curlen = 0;
- Context->length = 0;
- Context->state[0] = 0x6A09E667UL;
- Context->state[1] = 0xBB67AE85UL;
- Context->state[2] = 0x3C6EF372UL;
- Context->state[3] = 0xA54FF53AUL;
- Context->state[4] = 0x510E527FUL;
- Context->state[5] = 0x9B05688CUL;
- Context->state[6] = 0x1F83D9ABUL;
- Context->state[7] = 0x5BE0CD19UL;
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Update
-//
-// Adds data to the SHA256 context. This will process the data and update the internal state of the context. Keep on
-// calling this function until all the data has been added. Then call Sha256Finalise to calculate the hash.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Update
- (
- Sha256Context* Context, // [in out]
- void const* Buffer, // [in]
- uint32_t BufferSize // [in]
- )
-{
- uint32_t n;
-
- if( Context->curlen > sizeof(Context->buf) )
- {
- return;
- }
-
- while( BufferSize > 0 )
- {
- if( Context->curlen == 0 && BufferSize >= BLOCK_SIZE )
- {
- TransformFunction( Context, (uint8_t*)Buffer );
- Context->length += BLOCK_SIZE * 8;
- Buffer = (uint8_t*)Buffer + BLOCK_SIZE;
- BufferSize -= BLOCK_SIZE;
- }
- else
- {
- n = MIN( BufferSize, (BLOCK_SIZE - Context->curlen) );
- memcpy( Context->buf + Context->curlen, Buffer, (size_t)n );
- Context->curlen += n;
- Buffer = (uint8_t*)Buffer + n;
- BufferSize -= n;
- if( Context->curlen == BLOCK_SIZE )
- {
- TransformFunction( Context, Context->buf );
- Context->length += 8*BLOCK_SIZE;
- Context->curlen = 0;
- }
- }
- }
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Finalise
-//
-// Performs the final calculation of the hash and returns the digest (32 byte buffer containing 256bit hash). After
-// calling this, Sha256Initialised must be used to reuse the context.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Finalise
- (
- Sha256Context* Context, // [in out]
- SHA256_HASH* Digest // [out]
- )
-{
- int i;
-
- if( Context->curlen >= sizeof(Context->buf) )
- {
- return;
- }
-
- // Increase the length of the message
- Context->length += Context->curlen * 8;
-
- // Append the '1' bit
- Context->buf[Context->curlen++] = (uint8_t)0x80;
-
- // if the length is currently above 56 bytes we append zeros
- // then compress. Then we can fall back to padding zeros and length
- // encoding like normal.
- if( Context->curlen > 56 )
- {
- while( Context->curlen < 64 )
- {
- Context->buf[Context->curlen++] = (uint8_t)0;
- }
- TransformFunction(Context, Context->buf);
- Context->curlen = 0;
- }
-
- // Pad up to 56 bytes of zeroes
- while( Context->curlen < 56 )
- {
- Context->buf[Context->curlen++] = (uint8_t)0;
- }
-
- // Store length
- STORE64H( Context->length, Context->buf+56 );
- TransformFunction( Context, Context->buf );
-
- // Copy output
- for( i=0; i<8; i++ )
- {
- STORE32H( Context->state[i], Digest->bytes+(4*i) );
- }
-}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Calculate
-//
-// Combines Sha256Initialise, Sha256Update, and Sha256Finalise into one function. Calculates the SHA256 hash of the
-// buffer.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Calculate
- (
- void const* Buffer, // [in]
- uint32_t BufferSize, // [in]
- SHA256_HASH* Digest // [in]
- )
-{
- Sha256Context context;
-
- Sha256Initialise( &context );
- Sha256Update( &context, Buffer, BufferSize );
- Sha256Finalise( &context, Digest );
-}
diff --git a/policycoreutils/semodule/sha256.h b/policycoreutils/semodule/sha256.h
deleted file mode 100644
index 406ed869..00000000
--- a/policycoreutils/semodule/sha256.h
+++ /dev/null
@@ -1,89 +0,0 @@
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// WjCryptLib_Sha256
-//
-// Implementation of SHA256 hash function.
-// Original author: Tom St Denis, tomstdenis@gmail.com, http://libtom.org
-// Modified by WaterJuice retaining Public Domain license.
-//
-// This is free and unencumbered software released into the public domain - June 2013 waterjuice.org
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-#pragma once
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// IMPORTS
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-#include <stdint.h>
-#include <stdio.h>
-
-typedef struct
-{
- uint64_t length;
- uint32_t state[8];
- uint32_t curlen;
- uint8_t buf[64];
-} Sha256Context;
-
-#define SHA256_HASH_SIZE ( 256 / 8 )
-
-typedef struct
-{
- uint8_t bytes [SHA256_HASH_SIZE];
-} SHA256_HASH;
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// PUBLIC FUNCTIONS
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Initialise
-//
-// Initialises a SHA256 Context. Use this to initialise/reset a context.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Initialise
- (
- Sha256Context* Context // [out]
- );
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Update
-//
-// Adds data to the SHA256 context. This will process the data and update the internal state of the context. Keep on
-// calling this function until all the data has been added. Then call Sha256Finalise to calculate the hash.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Update
- (
- Sha256Context* Context, // [in out]
- void const* Buffer, // [in]
- uint32_t BufferSize // [in]
- );
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Finalise
-//
-// Performs the final calculation of the hash and returns the digest (32 byte buffer containing 256bit hash). After
-// calling this, Sha256Initialised must be used to reuse the context.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Finalise
- (
- Sha256Context* Context, // [in out]
- SHA256_HASH* Digest // [out]
- );
-
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// Sha256Calculate
-//
-// Combines Sha256Initialise, Sha256Update, and Sha256Finalise into one function. Calculates the SHA256 hash of the
-// buffer.
-////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-void
- Sha256Calculate
- (
- void const* Buffer, // [in]
- uint32_t BufferSize, // [in]
- SHA256_HASH* Digest // [in]
- );
--
2.30.2

144
SOURCES/0046-semodule-add-command-line-option-to-detect-module-ch.patch Normal file
View File

@ -0,0 +1,144 @@
From e3fc737e43561ecadcb977ce4c9a1db44be636ae Mon Sep 17 00:00:00 2001
From: Ondrej Mosnacek <omosnace@redhat.com>
Date: Thu, 3 Feb 2022 17:53:27 +0100
Subject: [PATCH] semodule: add command-line option to detect module changes
Add a new command-line option "--rebuild-if-modules-changed" to control
the newly introduced check_ext_changes libsemanage flag.
For example, running `semodule --rebuild-if-modules-changed` will ensure
that any externally added/removed modules (e.g. by an RPM transaction)
are reflected in the compiled policy, while skipping the most expensive
part of the rebuild if no module change was deteceted since the last
libsemanage transaction.
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
---
policycoreutils/semodule/semodule.8 | 7 +++++++
policycoreutils/semodule/semodule.c | 32 ++++++++++++++++++++++-------
2 files changed, 32 insertions(+), 7 deletions(-)
diff --git a/policycoreutils/semodule/semodule.8 b/policycoreutils/semodule/semodule.8
index 3a2fb21c..d1735d21 100644
--- a/policycoreutils/semodule/semodule.8
+++ b/policycoreutils/semodule/semodule.8
@@ -23,6 +23,13 @@ force a reload of policy
.B \-B, \-\-build
force a rebuild of policy (also reloads unless \-n is used)
.TP
+.B \-\-rebuild-if-modules-changed
+Force a rebuild of the policy if any changes to module content are detected
+(by comparing with checksum from the last transaction). One can use this
+instead of \-B to ensure that any changes to the module store done by an
+external tool (e.g. a package manager) are applied, while automatically
+skipping the rebuild if there are no new changes.
+.TP
.B \-D, \-\-disable_dontaudit
Temporarily remove dontaudits from policy. Reverts whenever policy is rebuilt
.TP
diff --git a/policycoreutils/semodule/semodule.c b/policycoreutils/semodule/semodule.c
index 243b1add..22a42a75 100644
--- a/policycoreutils/semodule/semodule.c
+++ b/policycoreutils/semodule/semodule.c
@@ -46,6 +46,7 @@ static int verbose;
static int reload;
static int no_reload;
static int build;
+static int check_ext_changes;
static int disable_dontaudit;
static int preserve_tunables;
static int ignore_module_cache;
@@ -148,6 +149,9 @@ static void usage(char *progname)
printf(" -c, --cil extract module as cil. This only affects module extraction.\n");
printf(" -H, --hll extract module as hll. This only affects module extraction.\n");
printf(" -m, --checksum print module checksum (SHA256).\n");
+ printf(" --rebuild-if-modules-changed\n"
+ " force policy rebuild if module content changed since\n"
+ " last rebuild (based on checksum)\n");
}
/* Sets the global mode variable to new_mode, but only if no other
@@ -179,6 +183,7 @@ static void set_mode(enum client_modes new_mode, char *arg)
static void parse_command_line(int argc, char **argv)
{
static struct option opts[] = {
+ {"rebuild-if-modules-changed", 0, NULL, '\0'},
{"store", required_argument, NULL, 's'},
{"base", required_argument, NULL, 'b'},
{"help", 0, NULL, 'h'},
@@ -206,15 +211,26 @@ static void parse_command_line(int argc, char **argv)
};
int extract_selected = 0;
int cil_hll_set = 0;
- int i;
+ int i, longind;
verbose = 0;
reload = 0;
no_reload = 0;
+ check_ext_changes = 0;
priority = 400;
while ((i =
- getopt_long(argc, argv, "s:b:hi:l::vr:u:RnNBDCPX:e:d:p:S:E:cHm", opts,
- NULL)) != -1) {
+ getopt_long(argc, argv, "s:b:hi:l::vr:u:RnNBDCPX:e:d:p:S:E:cHm",
+ opts, &longind)) != -1) {
switch (i) {
+ case '\0':
+ switch(longind) {
+ case 0: /* --rebuild-if-modules-changed */
+ check_ext_changes = 1;
+ break;
+ default:
+ usage(argv[0]);
+ exit(1);
+ }
+ break;
case 'b':
fprintf(stderr, "The --base option is deprecated. Use --install instead.\n");
set_mode(INSTALL_M, optarg);
@@ -299,13 +315,13 @@ static void parse_command_line(int argc, char **argv)
}
}
}
- if ((build || reload) && num_commands) {
+ if ((build || reload || check_ext_changes) && num_commands) {
fprintf(stderr,
"build or reload should not be used with other commands\n");
usage(argv[0]);
exit(1);
}
- if (num_commands == 0 && reload == 0 && build == 0) {
+ if (num_commands == 0 && reload == 0 && build == 0 && check_ext_changes == 0) {
fprintf(stderr, "At least one mode must be specified.\n");
usage(argv[0]);
exit(1);
@@ -392,7 +408,7 @@ int main(int argc, char *argv[])
}
parse_command_line(argc, argv);
- if (build)
+ if (build || check_ext_changes)
commit = 1;
sh = semanage_handle_create();
@@ -431,7 +447,7 @@ int main(int argc, char *argv[])
}
}
- if (build) {
+ if (build || check_ext_changes) {
if ((result = semanage_begin_transaction(sh)) < 0) {
fprintf(stderr, "%s: Could not begin transaction: %s\n",
argv[0], errno ? strerror(errno) : "");
@@ -805,6 +821,8 @@ cleanup_disable:
semanage_set_reload(sh, 0);
if (build)
semanage_set_rebuild(sh, 1);
+ if (check_ext_changes)
+ semanage_set_check_ext_changes(sh, 1);
if (disable_dontaudit)
semanage_set_disable_dontaudit(sh, 1);
else if (build)
--
2.30.2

20
SPECS/policycoreutils.spec
View File

@ -1,6 +1,6 @@
%global libauditver 3.0
%global libsepolver 2.9-1
%global libsemanagever 2.9-2
%global libsemanagever 2.9-7
%global libselinuxver 2.9-1
%global sepolgenver 2.9
@ -12,7 +12,7 @@
Summary: SELinux policy core utilities
Name: policycoreutils
Version: 2.9
Release: 16%{?dist}
Release: 19%{?dist}
License: GPLv2
# https://github.com/SELinuxProject/selinux/wiki/Releases
Source0: https://github.com/SELinuxProject/selinux/releases/download/20190315/policycoreutils-2.9.tar.gz
@ -78,6 +78,12 @@ Patch0037: 0037-setfiles-drop-ABORT_ON_ERRORS-and-related-code.patch
Patch0038: 0038-policycoreutils-setfiles-Drop-unused-nerr-variable.patch
Patch0039: 0039-selinux-8-5-Describe-fcontext-regular-expressions.patch
Patch0040: 0040-policycoreutils-setfiles-do-not-restrict-checks-agai.patch
Patch0041: 0041-semodule-add-m-checksum-option.patch
Patch0042: 0042-semodule-Fix-lang_ext-column-index.patch
Patch0043: 0043-semodule-Don-t-forget-to-munmap-data.patch
Patch0044: 0044-policycoreutils-Improve-error-message-when-selabel_o.patch
Patch0045: 0045-semodule-libsemanage-move-module-hashing-into-libsem.patch
Patch0046: 0046-semodule-add-command-line-option-to-detect-module-ch.patch
Obsoletes: policycoreutils < 2.0.61-2
Conflicts: filesystem < 3, selinux-policy-base < 3.13.1-138
@ -517,6 +523,16 @@ The policycoreutils-restorecond package contains the restorecond service.
%systemd_postun_with_restart restorecond.service
%changelog
* Thu Feb 17 2022 Vit Mojzis <vmojzis@redhat.com> - 2.9-19
- semodule: move module hashing into libsemanage (requires libsemanage-2.9-7)
- semodule: add command-line option to detect module changes (#2049189)
* Fri Jan 14 2022 Vit Mojzis <vmojzis@redhat.com> - 2.9-18
- Improve error message when selabel_open fails (#1926511)
* Tue Nov 30 2021 Petr Lautrbach <plautrba@redhat.com> - 2.9-17
- semodule: add -m | --checksum option
* Thu Sep 16 2021 Vit Mojzis <vmojzis@redhat.com> - 2.9-16
- Update translations (#1962009)