crypto: Move md5_transform to lib/md5.c, CVE-2011-3188

We are going to use this for TCP/IP sequence number and fragment ID
generation.

Signed-off-by: David S. Miller <davem@davemloft.net>

(cherry picked from commit bc0b96b54a21246e377122d54569eef71cec535f)
CVE-2011-3188
BugLink: http://bugs.launchpad.net/bugs/834129
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/crypto/md5.c b/crypto/md5.c
index 30efc7d..7febeaa 100644 (file)
--- a/crypto/md5.c
+++ b/crypto/md5.c
@@ -21,99 +21,9 @@
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/types.h>
+#include <linux/cryptohash.h>
 #include <asm/byteorder.h>
 
-#define F1(x, y, z)    (z ^ (x & (y ^ z)))
-#define F2(x, y, z)    F1(z, x, y)
-#define F3(x, y, z)    (x ^ y ^ z)
-#define F4(x, y, z)    (y ^ (x | ~z))
-
-#define MD5STEP(f, w, x, y, z, in, s) \
-       (w += f(x, y, z) + in, w = (w<<s | w>>(32-s)) + x)
-
-static void md5_transform(u32 *hash, u32 const *in)
-{
-       u32 a, b, c, d;
-
-       a = hash[0];
-       b = hash[1];
-       c = hash[2];
-       d = hash[3];
-
-       MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
-       MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
-       MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
-       MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
-       MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
-       MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
-       MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
-       MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
-       MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
-       MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
-       MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
-       MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
-       MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
-       MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
-       MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
-       MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
-
-       MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
-       MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
-       MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
-       MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
-       MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
-       MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
-       MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
-       MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
-       MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
-       MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
-       MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
-       MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
-       MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
-       MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
-       MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
-       MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
-
-       MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
-       MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
-       MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
-       MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
-       MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
-       MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
-       MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
-       MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
-       MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
-       MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
-       MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
-       MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
-       MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
-       MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
-       MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
-       MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
-
-       MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
-       MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
-       MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
-       MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
-       MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
-       MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
-       MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
-       MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
-       MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
-       MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
-       MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
-       MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
-       MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
-       MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
-       MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
-       MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
-
-       hash[0] += a;
-       hash[1] += b;
-       hash[2] += c;
-       hash[3] += d;
-}
-
 /* XXX: this stuff can be optimized */
 static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
 {

diff --git a/include/linux/cryptohash.h b/include/linux/cryptohash.h
index ec78a4b..d2984fb 100644 (file)
--- a/include/linux/cryptohash.h
+++ b/include/linux/cryptohash.h
@@ -8,6 +8,11 @@
 void sha_init(__u32 *buf);
 void sha_transform(__u32 *digest, const char *data, __u32 *W);
 
+#define MD5_DIGEST_WORDS 4
+#define MD5_MESSAGE_BYTES 64
+
+void md5_transform(__u32 *hash, __u32 const *in);
+
 __u32 half_md4_transform(__u32 buf[4], __u32 const in[8]);
 
 #endif

diff --git a/lib/Makefile b/lib/Makefile
index dfbf7d8..ca5b8e8 100644 (file)
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -10,7 +10,7 @@ endif
 lib-y := ctype.o string.o vsprintf.o cmdline.o \
         rbtree.o radix-tree.o dump_stack.o timerqueue.o\
         idr.o int_sqrt.o extable.o prio_tree.o \
-        sha1.o irq_regs.o reciprocal_div.o argv_split.o \
+        sha1.o md5.o irq_regs.o reciprocal_div.o argv_split.o \
         proportions.o prio_heap.o ratelimit.o show_mem.o \
         is_single_threaded.o plist.o decompress.o
 

diff --git a/lib/md5.c b/lib/md5.c
new file mode 100644 (file)
index 0000000..c777180
--- /dev/null
+++ b/lib/md5.c
@@ -0,0 +1,95 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cryptohash.h>
+
+#define F1(x, y, z)    (z ^ (x & (y ^ z)))
+#define F2(x, y, z)    F1(z, x, y)
+#define F3(x, y, z)    (x ^ y ^ z)
+#define F4(x, y, z)    (y ^ (x | ~z))
+
+#define MD5STEP(f, w, x, y, z, in, s) \
+       (w += f(x, y, z) + in, w = (w<<s | w>>(32-s)) + x)
+
+void md5_transform(__u32 *hash, __u32 const *in)
+{
+       u32 a, b, c, d;
+
+       a = hash[0];
+       b = hash[1];
+       c = hash[2];
+       d = hash[3];
+
+       MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+       MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+       MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+       MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+       MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+       MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+       MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+       MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+       MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+       MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+       MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+       MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+       MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+       MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+       MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+       MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+       MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+       MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+       MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+       MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+       MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+       MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+       MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+       MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+       MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+       MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+       MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+       MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+       MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+       MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+       MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+       MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+       MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+       MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+       MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+       MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+       MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+       MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+       MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+       MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+       MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+       MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+       MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+       MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+       MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+       MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+       MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+       MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+       MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+       MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+       MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+       MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+       MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+       MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+       MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+       MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+       MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+       MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+       MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+       MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+       MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+       MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+       MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+       MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+       hash[0] += a;
+       hash[1] += b;
+       hash[2] += c;
+       hash[3] += d;
+}
+EXPORT_SYMBOL(md5_transform);