linux/crypto
David Howells 0aa0409401 PEFILE: Relax the check on the length of the PKCS#7 cert
Relax the check on the length of the PKCS#7 cert as it appears that the PE
file wrapper size gets rounded up to the nearest 8.

The debugging output looks like this:

	PEFILE: ==> verify_pefile_signature()
	PEFILE: ==> pefile_parse_binary()
	PEFILE: checksum @ 110
	PEFILE: header size = 200
	PEFILE: cert = 968 @547be0 [68 09 00 00 00 02 02 00 30 82 09 56 ]
	PEFILE: sig wrapper = { 968, 200, 2 }
	PEFILE: Signature data not PKCS#7

The wrapper is the first 8 bytes of the hex dump inside [].  This indicates a
length of 0x968 bytes, including the wrapper header - so 0x960 bytes of
payload.

The ASN.1 wrapper begins [ ... 30 82 09 56 ].  That indicates an object of size
0x956 - a four byte discrepency, presumably just padding for alignment
purposes.

So we just check that the ASN.1 container is no bigger than the payload and
reduce the recorded size appropriately.

Whilst we're at it, allow shorter PKCS#7 objects that manage to squeeze within
127 or 255 bytes.  It's just about conceivable if no X.509 certs are included
in the PKCS#7 message.

Reported-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Peter Jones <pjones@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2014-09-03 10:30:24 +10:00
..
asymmetric_keys PEFILE: Relax the check on the length of the PKCS#7 cert 2014-09-03 10:30:24 +10:00
async_tx
842.c
Kconfig Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2014-08-05 10:05:29 -07:00
Makefile crypto: drbg - Use Kconfig to ensure at least one RNG option is set 2014-07-04 22:15:08 +08:00
ablk_helper.c
ablkcipher.c
aead.c
aes_generic.c
af_alg.c crypto: af_alg - properly label AF_ALG socket 2014-07-31 21:54:00 +08:00
ahash.c
algapi.c crypto: fips - only panic on bad/missing crypto mod signatures 2014-07-03 21:38:32 +08:00
algboss.c
algif_hash.c
algif_skcipher.c
ansi_cprng.c
anubis.c
api.c
arc4.c
authenc.c
authencesn.c
blkcipher.c
blowfish_common.c
blowfish_generic.c
camellia_generic.c
cast5_generic.c
cast6_generic.c
cast_common.c
cbc.c
ccm.c
chainiv.c
cipher.c
cmac.c
compress.c
crc32.c
crc32c_generic.c
crct10dif_common.c
crct10dif_generic.c
cryptd.c crypto: Resolve shadow warnings 2014-08-01 22:35:55 +08:00
crypto_null.c
crypto_user.c
crypto_wq.c
ctr.c
cts.c
deflate.c
des_generic.c crypto: des_3des - add x86-64 assembly implementation 2014-06-20 21:27:58 +08:00
drbg.c crypto: drbg - fix failure of generating multiple of 2**16 bytes 2014-08-01 22:36:14 +08:00
ecb.c
eseqiv.c crypto: Resolve shadow warnings 2014-08-01 22:35:55 +08:00
fcrypt.c
fips.c
gcm.c crypto: Resolve shadow warnings 2014-08-01 22:35:55 +08:00
gf128mul.c
ghash-generic.c
hash_info.c
hmac.c
internal.h
khazad.c
krng.c
lrw.c
lz4.c
lz4hc.c
lzo.c crypto: lzo - use kvfree() helper 2014-06-25 21:51:53 +08:00
md4.c
md5.c
memneq.c
michael_mic.c
pcbc.c
pcompress.c
pcrypt.c
proc.c
ripemd.h
rmd128.c
rmd160.c
rmd256.c
rmd320.c
rng.c
salsa20_generic.c
scatterwalk.c
seed.c
seqiv.c crypto: Resolve shadow warnings 2014-08-01 22:35:55 +08:00
serpent_generic.c
sha1_generic.c
sha256_generic.c
sha512_generic.c
shash.c
tcrypt.c crypto: Resolve shadow warnings 2014-08-01 22:35:55 +08:00
tcrypt.h
tea.c
testmgr.c crypto: testmgr - add missing spaces to drbg error strings 2014-08-01 22:36:13 +08:00
testmgr.h crypto: testmgr - use chunks smaller than algo block size in chunk tests 2014-08-01 22:36:11 +08:00
tgr192.c
twofish_common.c
twofish_generic.c
vmac.c
wp512.c
xcbc.c
xor.c
xts.c
zlib.c initramfs: support initramfs that is bigger than 2GiB 2014-08-08 15:57:26 -07:00