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Accepting request 711377 from home:pmonrealgonzalez:branches:devel:libraries:c_c++

Browse Source 
- Fixed env-script-interpreter in cavs_driver.pl

- Security fix: [bsc#1138939, CVE-2019-12904]
  * The C implementation of AES is vulnerable to a flush-and-reload
    side-channel attack because physical addresses are available to
    other processes. (The C implementation is used on platforms where
    an assembly-language implementation is unavailable.)
  * Added patches:
    - libgcrypt-CVE-2019-12904-GCM-Prefetch.patch
    - libgcrypt-CVE-2019-12904-GCM.patch
    - libgcrypt-CVE-2019-12904-AES.patch

OBS-URL: https://build.opensuse.org/request/show/711377
OBS-URL: https://build.opensuse.org/package/show/devel:libraries:c_c++/libgcrypt?expand=0&rev=127
This commit is contained in:
Pedro Monreal Gonzalez 2019-06-25 12:49:02 +00:00 committed by Git OBS Bridge
parent 61eeda1b5c
commit 02d04cf4ae
6 changed files with 597 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
cavs_driver.pl
View File

@ -1,4 +1,4 @@
#!/usr/bin/env perl
#!/usr/bin/perl
#
# $Id: cavs_driver.pl 3235 2014-04-01 06:24:16Z smueller $
#

322
libgcrypt-CVE-2019-12904-AES.patch Normal file
View File

@ -0,0 +1,322 @@
From daedbbb5541cd8ecda1459d3b843ea4d92788762 Mon Sep 17 00:00:00 2001
From: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Date: Fri, 31 May 2019 17:18:09 +0300
Subject: [PATCH] AES: move look-up tables to .data section and unshare between
processes
* cipher/rijndael-internal.h (ATTR_ALIGNED_64): New.
* cipher/rijndael-tables.h (encT): Move to 'enc_tables' structure.
(enc_tables): New structure for encryption table with counters before
and after.
(encT): New macro.
(dec_tables): Add counters before and after encryption table; Move
from .rodata to .data section.
(do_encrypt): Change 'encT' to 'enc_tables.T'.
(do_decrypt): Change '&dec_tables' to 'dec_tables.T'.
* cipher/cipher-gcm.c (prefetch_table): Make inline; Handle input
with length not multiple of 256.
(prefetch_enc, prefetch_dec): Modify pre- and post-table counters
to unshare look-up table pages between processes.
--
GnuPG-bug-id: 4541
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
---
cipher/rijndael-internal.h | 4 +-
cipher/rijndael-tables.h | 155 +++++++++++++++++++++----------------
cipher/rijndael.c | 35 +++++++--
3 files changed, 118 insertions(+), 76 deletions(-)
Index: libgcrypt-1.8.4/cipher/rijndael-internal.h
===================================================================
--- libgcrypt-1.8.4.orig/cipher/rijndael-internal.h
+++ libgcrypt-1.8.4/cipher/rijndael-internal.h
@@ -29,11 +29,13 @@
#define BLOCKSIZE (128/8)
-/* Helper macro to force alignment to 16 bytes. */
+/* Helper macro to force alignment to 16 or 64 bytes. */
#ifdef HAVE_GCC_ATTRIBUTE_ALIGNED
# define ATTR_ALIGNED_16 __attribute__ ((aligned (16)))
+# define ATTR_ALIGNED_64 __attribute__ ((aligned (64)))
#else
# define ATTR_ALIGNED_16
+# define ATTR_ALIGNED_64
#endif
Index: libgcrypt-1.8.4/cipher/rijndael-tables.h
===================================================================
--- libgcrypt-1.8.4.orig/cipher/rijndael-tables.h
+++ libgcrypt-1.8.4/cipher/rijndael-tables.h
@@ -21,80 +21,98 @@
/* To keep the actual implementation at a readable size we use this
include file to define the tables. */
-static const u32 encT[256] =
+static struct
+{
+ volatile u32 counter_head;
+ u32 cacheline_align[64 / 4 - 1];
+ u32 T[256];
+ volatile u32 counter_tail;
+} enc_tables ATTR_ALIGNED_64 =
{
- 0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6,
- 0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591,
- 0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56,
- 0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec,
- 0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa,
- 0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb,
- 0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45,
- 0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b,
- 0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c,
- 0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83,
- 0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9,
- 0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a,
- 0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d,
- 0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f,
- 0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df,
- 0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea,
- 0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34,
- 0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b,
- 0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d,
- 0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413,
- 0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1,
- 0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6,
- 0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972,
- 0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85,
- 0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed,
- 0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511,
- 0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe,
- 0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b,
- 0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05,
- 0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1,
- 0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142,
- 0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf,
- 0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3,
- 0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e,
- 0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a,
- 0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6,
- 0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3,
- 0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b,
- 0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428,
- 0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad,
- 0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14,
- 0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8,
- 0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4,
- 0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2,
- 0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda,
- 0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949,
- 0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf,
- 0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810,
- 0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c,
- 0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697,
- 0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e,
- 0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f,
- 0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc,
- 0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c,
- 0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969,
- 0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27,
- 0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122,
- 0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433,
- 0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9,
- 0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5,
- 0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a,
- 0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0,
- 0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e,
- 0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c
+ 0,
+ { 0, },
+ {
+ 0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6,
+ 0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591,
+ 0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56,
+ 0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec,
+ 0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa,
+ 0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb,
+ 0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45,
+ 0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b,
+ 0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c,
+ 0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83,
+ 0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9,
+ 0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a,
+ 0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d,
+ 0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f,
+ 0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df,
+ 0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea,
+ 0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34,
+ 0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b,
+ 0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d,
+ 0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413,
+ 0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1,
+ 0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6,
+ 0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972,
+ 0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85,
+ 0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed,
+ 0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511,
+ 0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe,
+ 0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b,
+ 0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05,
+ 0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1,
+ 0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142,
+ 0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf,
+ 0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3,
+ 0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e,
+ 0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a,
+ 0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6,
+ 0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3,
+ 0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b,
+ 0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428,
+ 0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad,
+ 0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14,
+ 0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8,
+ 0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4,
+ 0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2,
+ 0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda,
+ 0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949,
+ 0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf,
+ 0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810,
+ 0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c,
+ 0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697,
+ 0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e,
+ 0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f,
+ 0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc,
+ 0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c,
+ 0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969,
+ 0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27,
+ 0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122,
+ 0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433,
+ 0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9,
+ 0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5,
+ 0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a,
+ 0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0,
+ 0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e,
+ 0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c
+ },
+ 0
};
-static const struct
+#define encT enc_tables.T
+
+static struct
{
+ volatile u32 counter_head;
+ u32 cacheline_align[64 / 4 - 1];
u32 T[256];
byte inv_sbox[256];
-} dec_tables =
+ volatile u32 counter_tail;
+} dec_tables ATTR_ALIGNED_64 =
{
+ 0,
+ { 0, },
{
0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a,
0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b,
@@ -194,7 +212,8 @@ static const struct
0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61,
0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26,
0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d
- }
+ },
+ 0
};
#define decT dec_tables.T
Index: libgcrypt-1.8.4/cipher/rijndael.c
===================================================================
--- libgcrypt-1.8.4.orig/cipher/rijndael.c
+++ libgcrypt-1.8.4/cipher/rijndael.c
@@ -227,11 +227,11 @@ static const char *selftest(void);
/* Prefetching for encryption/decryption tables. */
-static void prefetch_table(const volatile byte *tab, size_t len)
+static inline void prefetch_table(const volatile byte *tab, size_t len)
{
size_t i;
- for (i = 0; i < len; i += 8 * 32)
+ for (i = 0; len - i >= 8 * 32; i += 8 * 32)
{
(void)tab[i + 0 * 32];
(void)tab[i + 1 * 32];
@@ -242,17 +242,37 @@ static void prefetch_table(const volatil
(void)tab[i + 6 * 32];
(void)tab[i + 7 * 32];
}
+ for (; i < len; i += 32)
+ {
+ (void)tab[i];
+ }
(void)tab[len - 1];
}
static void prefetch_enc(void)
{
- prefetch_table((const void *)encT, sizeof(encT));
+ /* Modify counters to trigger copy-on-write and unsharing if physical pages
+ * of look-up table are shared between processes. Modifying counters also
+ * causes checksums for pages to change and hint same-page merging algorithm
+ * that these pages are frequently changing. */
+ enc_tables.counter_head++;
+ enc_tables.counter_tail++;
+
+ /* Prefetch look-up tables to cache. */
+ prefetch_table((const void *)&enc_tables, sizeof(enc_tables));
}
static void prefetch_dec(void)
{
+ /* Modify counters to trigger copy-on-write and unsharing if physical pages
+ * of look-up table are shared between processes. Modifying counters also
+ * causes checksums for pages to change and hint same-page merging algorithm
+ * that these pages are frequently changing. */
+ dec_tables.counter_head++;
+ dec_tables.counter_tail++;
+
+ /* Prefetch look-up tables to cache. */
prefetch_table((const void *)&dec_tables, sizeof(dec_tables));
}
@@ -737,7 +757,7 @@ do_encrypt (const RIJNDAEL_context *ctx,
#ifdef USE_AMD64_ASM
# ifdef HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS
return _gcry_aes_amd64_encrypt_block(ctx->keyschenc, bx, ax, ctx->rounds,
- encT);
+ enc_tables.T);
# else
/* Call SystemV ABI function without storing non-volatile XMM registers,
* as target function does not use vector instruction sets. */
@@ -757,7 +777,8 @@ do_encrypt (const RIJNDAEL_context *ctx,
return ret;
# endif /* HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS */
#elif defined(USE_ARM_ASM)
- return _gcry_aes_arm_encrypt_block(ctx->keyschenc, bx, ax, ctx->rounds, encT);
+ return _gcry_aes_arm_encrypt_block(ctx->keyschenc, bx, ax, ctx->rounds,
+ enc_tables.T);
#else
return do_encrypt_fn (ctx, bx, ax);
#endif /* !USE_ARM_ASM && !USE_AMD64_ASM*/
@@ -1120,7 +1141,7 @@ do_decrypt (const RIJNDAEL_context *ctx,
#ifdef USE_AMD64_ASM
# ifdef HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS
return _gcry_aes_amd64_decrypt_block(ctx->keyschdec, bx, ax, ctx->rounds,
- &dec_tables);
+ dec_tables.T);
# else
/* Call SystemV ABI function without storing non-volatile XMM registers,
* as target function does not use vector instruction sets. */
@@ -1141,7 +1162,7 @@ do_decrypt (const RIJNDAEL_context *ctx,
# endif /* HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS */
#elif defined(USE_ARM_ASM)
return _gcry_aes_arm_decrypt_block(ctx->keyschdec, bx, ax, ctx->rounds,
- &dec_tables);
+ dec_tables.T);
#else
return do_decrypt_fn (ctx, bx, ax);
#endif /*!USE_ARM_ASM && !USE_AMD64_ASM*/

80
libgcrypt-CVE-2019-12904-GCM-Prefetch.patch Normal file
View File

@ -0,0 +1,80 @@
From 1374254c2904ab5b18ba4a890856824a102d4705 Mon Sep 17 00:00:00 2001
From: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Date: Sat, 27 Apr 2019 19:33:28 +0300
Subject: [PATCH] Prefetch GCM look-up tables
* cipher/cipher-gcm.c (prefetch_table, do_prefetch_tables)
(prefetch_tables): New.
(ghash_internal): Call prefetch_tables.
--
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
---
cipher/cipher-gcm.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/cipher/cipher-gcm.c b/cipher/cipher-gcm.c
index c19f09f2..11f119aa 100644
--- a/cipher/cipher-gcm.c
+++ b/cipher/cipher-gcm.c
@@ -118,6 +118,34 @@ static const u16 gcmR[256] = {
0xbbf0, 0xba32, 0xb874, 0xb9b6, 0xbcf8, 0xbd3a, 0xbf7c, 0xbebe,
};
+static inline
+void prefetch_table(const void *tab, size_t len)
+{
+ const volatile byte *vtab = tab;
+ size_t i;
+
+ for (i = 0; i < len; i += 8 * 32)
+ {
+ (void)vtab[i + 0 * 32];
+ (void)vtab[i + 1 * 32];
+ (void)vtab[i + 2 * 32];
+ (void)vtab[i + 3 * 32];
+ (void)vtab[i + 4 * 32];
+ (void)vtab[i + 5 * 32];
+ (void)vtab[i + 6 * 32];
+ (void)vtab[i + 7 * 32];
+ }
+
+ (void)vtab[len - 1];
+}
+
+static inline void
+do_prefetch_tables (const void *gcmM, size_t gcmM_size)
+{
+ prefetch_table(gcmM, gcmM_size);
+ prefetch_table(gcmR, sizeof(gcmR));
+}
+
#ifdef GCM_TABLES_USE_U64
static void
bshift (u64 * b0, u64 * b1)
@@ -365,6 +393,8 @@ do_ghash (unsigned char *result, const unsigned char *buf, const u32 *gcmM)
#define fillM(c) \
do_fillM (c->u_mode.gcm.u_ghash_key.key, c->u_mode.gcm.gcm_table)
#define GHASH(c, result, buf) do_ghash (result, buf, c->u_mode.gcm.gcm_table)
+#define prefetch_tables(c) \
+ do_prefetch_tables(c->u_mode.gcm.gcm_table, sizeof(c->u_mode.gcm.gcm_table))
#else
@@ -430,6 +460,7 @@ do_ghash (unsigned char *hsub, unsigned char *result, const unsigned char *buf)
#define fillM(c) do { } while (0)
#define GHASH(c, result, buf) do_ghash (c->u_mode.gcm.u_ghash_key.key, result, buf)
+#define prefetch_tables(c) do {} while (0)
#endif /* !GCM_USE_TABLES */
@@ -441,6 +472,8 @@ ghash_internal (gcry_cipher_hd_t c, byte *result, const byte *buf,
const unsigned int blocksize = GCRY_GCM_BLOCK_LEN;
unsigned int burn = 0;
+ prefetch_tables (c);
+
while (nblocks)
{
burn = GHASH (c, result, buf);

168
libgcrypt-CVE-2019-12904-GCM.patch Normal file
View File

@ -0,0 +1,168 @@
From a4c561aab1014c3630bc88faf6f5246fee16b020 Mon Sep 17 00:00:00 2001
From: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Date: Fri, 31 May 2019 17:27:25 +0300
Subject: [PATCH] GCM: move look-up table to .data section and unshare between
processes
* cipher/cipher-gcm.c (ATTR_ALIGNED_64): New.
(gcmR): Move to 'gcm_table' structure.
(gcm_table): New structure for look-up table with counters before and
after.
(gcmR): New macro.
(prefetch_table): Handle input with length not multiple of 256.
(do_prefetch_tables): Modify pre- and post-table counters to unshare
look-up table pages between processes.
--
GnuPG-bug-id: 4541
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
---
cipher/cipher-gcm.c | 106 +++++++++++++++++++++++++++++---------------
1 file changed, 70 insertions(+), 36 deletions(-)
diff --git a/cipher/cipher-gcm.c b/cipher/cipher-gcm.c
index 11f119aa..194e2ec9 100644
--- a/cipher/cipher-gcm.c
+++ b/cipher/cipher-gcm.c
@@ -30,6 +30,14 @@
#include "./cipher-internal.h"
+/* Helper macro to force alignment to 16 or 64 bytes. */
+#ifdef HAVE_GCC_ATTRIBUTE_ALIGNED
+# define ATTR_ALIGNED_64 __attribute__ ((aligned (64)))
+#else
+# define ATTR_ALIGNED_64
+#endif
+
+
#ifdef GCM_USE_INTEL_PCLMUL
extern void _gcry_ghash_setup_intel_pclmul (gcry_cipher_hd_t c);
@@ -83,40 +91,54 @@ ghash_armv7_neon (gcry_cipher_hd_t c, byte *result, const byte *buf,
#ifdef GCM_USE_TABLES
-static const u16 gcmR[256] = {
- 0x0000, 0x01c2, 0x0384, 0x0246, 0x0708, 0x06ca, 0x048c, 0x054e,
- 0x0e10, 0x0fd2, 0x0d94, 0x0c56, 0x0918, 0x08da, 0x0a9c, 0x0b5e,
- 0x1c20, 0x1de2, 0x1fa4, 0x1e66, 0x1b28, 0x1aea, 0x18ac, 0x196e,
- 0x1230, 0x13f2, 0x11b4, 0x1076, 0x1538, 0x14fa, 0x16bc, 0x177e,
- 0x3840, 0x3982, 0x3bc4, 0x3a06, 0x3f48, 0x3e8a, 0x3ccc, 0x3d0e,
- 0x3650, 0x3792, 0x35d4, 0x3416, 0x3158, 0x309a, 0x32dc, 0x331e,
- 0x2460, 0x25a2, 0x27e4, 0x2626, 0x2368, 0x22aa, 0x20ec, 0x212e,
- 0x2a70, 0x2bb2, 0x29f4, 0x2836, 0x2d78, 0x2cba, 0x2efc, 0x2f3e,
- 0x7080, 0x7142, 0x7304, 0x72c6, 0x7788, 0x764a, 0x740c, 0x75ce,
- 0x7e90, 0x7f52, 0x7d14, 0x7cd6, 0x7998, 0x785a, 0x7a1c, 0x7bde,
- 0x6ca0, 0x6d62, 0x6f24, 0x6ee6, 0x6ba8, 0x6a6a, 0x682c, 0x69ee,
- 0x62b0, 0x6372, 0x6134, 0x60f6, 0x65b8, 0x647a, 0x663c, 0x67fe,
- 0x48c0, 0x4902, 0x4b44, 0x4a86, 0x4fc8, 0x4e0a, 0x4c4c, 0x4d8e,
- 0x46d0, 0x4712, 0x4554, 0x4496, 0x41d8, 0x401a, 0x425c, 0x439e,
- 0x54e0, 0x5522, 0x5764, 0x56a6, 0x53e8, 0x522a, 0x506c, 0x51ae,
- 0x5af0, 0x5b32, 0x5974, 0x58b6, 0x5df8, 0x5c3a, 0x5e7c, 0x5fbe,
- 0xe100, 0xe0c2, 0xe284, 0xe346, 0xe608, 0xe7ca, 0xe58c, 0xe44e,
- 0xef10, 0xeed2, 0xec94, 0xed56, 0xe818, 0xe9da, 0xeb9c, 0xea5e,
- 0xfd20, 0xfce2, 0xfea4, 0xff66, 0xfa28, 0xfbea, 0xf9ac, 0xf86e,
- 0xf330, 0xf2f2, 0xf0b4, 0xf176, 0xf438, 0xf5fa, 0xf7bc, 0xf67e,
- 0xd940, 0xd882, 0xdac4, 0xdb06, 0xde48, 0xdf8a, 0xddcc, 0xdc0e,
- 0xd750, 0xd692, 0xd4d4, 0xd516, 0xd058, 0xd19a, 0xd3dc, 0xd21e,
- 0xc560, 0xc4a2, 0xc6e4, 0xc726, 0xc268, 0xc3aa, 0xc1ec, 0xc02e,
- 0xcb70, 0xcab2, 0xc8f4, 0xc936, 0xcc78, 0xcdba, 0xcffc, 0xce3e,
- 0x9180, 0x9042, 0x9204, 0x93c6, 0x9688, 0x974a, 0x950c, 0x94ce,
- 0x9f90, 0x9e52, 0x9c14, 0x9dd6, 0x9898, 0x995a, 0x9b1c, 0x9ade,
- 0x8da0, 0x8c62, 0x8e24, 0x8fe6, 0x8aa8, 0x8b6a, 0x892c, 0x88ee,
- 0x83b0, 0x8272, 0x8034, 0x81f6, 0x84b8, 0x857a, 0x873c, 0x86fe,
- 0xa9c0, 0xa802, 0xaa44, 0xab86, 0xaec8, 0xaf0a, 0xad4c, 0xac8e,
- 0xa7d0, 0xa612, 0xa454, 0xa596, 0xa0d8, 0xa11a, 0xa35c, 0xa29e,
- 0xb5e0, 0xb422, 0xb664, 0xb7a6, 0xb2e8, 0xb32a, 0xb16c, 0xb0ae,
- 0xbbf0, 0xba32, 0xb874, 0xb9b6, 0xbcf8, 0xbd3a, 0xbf7c, 0xbebe,
-};
+static struct
+{
+ volatile u32 counter_head;
+ u32 cacheline_align[64 / 4 - 1];
+ u16 R[256];
+ volatile u32 counter_tail;
+} gcm_table ATTR_ALIGNED_64 =
+ {
+ 0,
+ { 0, },
+ {
+ 0x0000, 0x01c2, 0x0384, 0x0246, 0x0708, 0x06ca, 0x048c, 0x054e,
+ 0x0e10, 0x0fd2, 0x0d94, 0x0c56, 0x0918, 0x08da, 0x0a9c, 0x0b5e,
+ 0x1c20, 0x1de2, 0x1fa4, 0x1e66, 0x1b28, 0x1aea, 0x18ac, 0x196e,
+ 0x1230, 0x13f2, 0x11b4, 0x1076, 0x1538, 0x14fa, 0x16bc, 0x177e,
+ 0x3840, 0x3982, 0x3bc4, 0x3a06, 0x3f48, 0x3e8a, 0x3ccc, 0x3d0e,
+ 0x3650, 0x3792, 0x35d4, 0x3416, 0x3158, 0x309a, 0x32dc, 0x331e,
+ 0x2460, 0x25a2, 0x27e4, 0x2626, 0x2368, 0x22aa, 0x20ec, 0x212e,
+ 0x2a70, 0x2bb2, 0x29f4, 0x2836, 0x2d78, 0x2cba, 0x2efc, 0x2f3e,
+ 0x7080, 0x7142, 0x7304, 0x72c6, 0x7788, 0x764a, 0x740c, 0x75ce,
+ 0x7e90, 0x7f52, 0x7d14, 0x7cd6, 0x7998, 0x785a, 0x7a1c, 0x7bde,
+ 0x6ca0, 0x6d62, 0x6f24, 0x6ee6, 0x6ba8, 0x6a6a, 0x682c, 0x69ee,
+ 0x62b0, 0x6372, 0x6134, 0x60f6, 0x65b8, 0x647a, 0x663c, 0x67fe,
+ 0x48c0, 0x4902, 0x4b44, 0x4a86, 0x4fc8, 0x4e0a, 0x4c4c, 0x4d8e,
+ 0x46d0, 0x4712, 0x4554, 0x4496, 0x41d8, 0x401a, 0x425c, 0x439e,
+ 0x54e0, 0x5522, 0x5764, 0x56a6, 0x53e8, 0x522a, 0x506c, 0x51ae,
+ 0x5af0, 0x5b32, 0x5974, 0x58b6, 0x5df8, 0x5c3a, 0x5e7c, 0x5fbe,
+ 0xe100, 0xe0c2, 0xe284, 0xe346, 0xe608, 0xe7ca, 0xe58c, 0xe44e,
+ 0xef10, 0xeed2, 0xec94, 0xed56, 0xe818, 0xe9da, 0xeb9c, 0xea5e,
+ 0xfd20, 0xfce2, 0xfea4, 0xff66, 0xfa28, 0xfbea, 0xf9ac, 0xf86e,
+ 0xf330, 0xf2f2, 0xf0b4, 0xf176, 0xf438, 0xf5fa, 0xf7bc, 0xf67e,
+ 0xd940, 0xd882, 0xdac4, 0xdb06, 0xde48, 0xdf8a, 0xddcc, 0xdc0e,
+ 0xd750, 0xd692, 0xd4d4, 0xd516, 0xd058, 0xd19a, 0xd3dc, 0xd21e,
+ 0xc560, 0xc4a2, 0xc6e4, 0xc726, 0xc268, 0xc3aa, 0xc1ec, 0xc02e,
+ 0xcb70, 0xcab2, 0xc8f4, 0xc936, 0xcc78, 0xcdba, 0xcffc, 0xce3e,
+ 0x9180, 0x9042, 0x9204, 0x93c6, 0x9688, 0x974a, 0x950c, 0x94ce,
+ 0x9f90, 0x9e52, 0x9c14, 0x9dd6, 0x9898, 0x995a, 0x9b1c, 0x9ade,
+ 0x8da0, 0x8c62, 0x8e24, 0x8fe6, 0x8aa8, 0x8b6a, 0x892c, 0x88ee,
+ 0x83b0, 0x8272, 0x8034, 0x81f6, 0x84b8, 0x857a, 0x873c, 0x86fe,
+ 0xa9c0, 0xa802, 0xaa44, 0xab86, 0xaec8, 0xaf0a, 0xad4c, 0xac8e,
+ 0xa7d0, 0xa612, 0xa454, 0xa596, 0xa0d8, 0xa11a, 0xa35c, 0xa29e,
+ 0xb5e0, 0xb422, 0xb664, 0xb7a6, 0xb2e8, 0xb32a, 0xb16c, 0xb0ae,
+ 0xbbf0, 0xba32, 0xb874, 0xb9b6, 0xbcf8, 0xbd3a, 0xbf7c, 0xbebe,
+ },
+ 0
+ };
+
+#define gcmR gcm_table.R
static inline
void prefetch_table(const void *tab, size_t len)
@@ -124,7 +146,7 @@ void prefetch_table(const void *tab, size_t len)
const volatile byte *vtab = tab;
size_t i;
- for (i = 0; i < len; i += 8 * 32)
+ for (i = 0; len - i >= 8 * 32; i += 8 * 32)
{
(void)vtab[i + 0 * 32];
(void)vtab[i + 1 * 32];
@@ -135,6 +157,10 @@ void prefetch_table(const void *tab, size_t len)
(void)vtab[i + 6 * 32];
(void)vtab[i + 7 * 32];
}
+ for (; i < len; i += 32)
+ {
+ (void)vtab[i];
+ }
(void)vtab[len - 1];
}
@@ -142,8 +168,16 @@ void prefetch_table(const void *tab, size_t len)
static inline void
do_prefetch_tables (const void *gcmM, size_t gcmM_size)
{
+ /* Modify counters to trigger copy-on-write and unsharing if physical pages
+ * of look-up table are shared between processes. Modifying counters also
+ * causes checksums for pages to change and hint same-page merging algorithm
+ * that these pages are frequently changing. */
+ gcm_table.counter_head++;
+ gcm_table.counter_tail++;
+
+ /* Prefetch look-up tables to cache. */
prefetch_table(gcmM, gcmM_size);
- prefetch_table(gcmR, sizeof(gcmR));
+ prefetch_table(&gcm_table, sizeof(gcm_table));
}
#ifdef GCM_TABLES_USE_U64

18
libgcrypt.changes
View File

@ -1,3 +1,21 @@
-------------------------------------------------------------------
Fri Jun 21 16:53:07 UTC 2019 - Pedro Monreal Gonzalez <pmonrealgonzalez@suse.com>
- Fixed env-script-interpreter in cavs_driver.pl
-------------------------------------------------------------------
Fri Jun 21 16:39:00 UTC 2019 - Pedro Monreal Gonzalez <pmonrealgonzalez@suse.com>
- Security fix: [bsc#1138939, CVE-2019-12904]
* The C implementation of AES is vulnerable to a flush-and-reload
side-channel attack because physical addresses are available to
other processes. (The C implementation is used on platforms where
an assembly-language implementation is unavailable.)
* Added patches:
- libgcrypt-CVE-2019-12904-GCM-Prefetch.patch
- libgcrypt-CVE-2019-12904-GCM.patch
- libgcrypt-CVE-2019-12904-AES.patch
-------------------------------------------------------------------
Fri Apr 26 06:47:45 UTC 2019 - Jason Sikes <jsikes@suse.de>

11
libgcrypt.spec
View File

@ -63,6 +63,11 @@ Patch42: libgcrypt-fips_rsa_no_enforced_mode.patch
Patch43: libgcrypt-1.8.4-use_xfree.patch
Patch44: libgcrypt-1.8.4-allow_FSM_same_state.patch
Patch45: libgcrypt-1.8.4-getrandom.patch
#PATCH-FIX-UPSTREAM bsc#1138939 CVE-2019-12904 C implementation of AES is
#vulnerable to a flush-and-reload side-channel attack
Patch46: libgcrypt-CVE-2019-12904-GCM-Prefetch.patch
Patch47: libgcrypt-CVE-2019-12904-GCM.patch
Patch48: libgcrypt-CVE-2019-12904-AES.patch
BuildRequires: automake >= 1.14
BuildRequires: fipscheck
BuildRequires: libgpg-error-devel >= 1.25
@ -168,7 +173,7 @@ make %{?_smp_mflags}
# invalidates a HMAC that may have been created earlier.
# solution: create the hashes _after_ the macro runs.
#
# this shows up earlier because otherwise the %expand of
# this shows up earlier because otherwise the %%expand of
# the macro is too late.
%{expand:%%global __os_install_post {%__os_install_post
fipshmac %{buildroot}/%{_bindir}/hmac256
@ -207,7 +212,7 @@ mv %{buildroot}%{_bindir}/drbg_test %{buildroot}%{cavs_dir}
%files -n %{libsoname}-hmac
%if 0%{?build_hmac256}
%{_libdir}/.libgcrypt.so.*.hmac
%endif # %if 0%{?build_hmac256}
%endif # %%if 0%%{?build_hmac256}
%files devel
%license COPYING COPYING.LIB
@ -222,7 +227,7 @@ mv %{buildroot}%{_bindir}/drbg_test %{buildroot}%{cavs_dir}
%if 0%{?separate_hmac256_binary}
%files hmac256
%endif # %if 0%{?separate_hmac256_binary}
%endif # %%if 0%%{?separate_hmac256_binary}
%{_bindir}/hmac256
%{_bindir}/.hmac256.hmac
%doc %{_mandir}/man1/hmac256.1*