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Neil Horman d8a7dd7122 crypto: ansi_cprng - Fix off by one error in non-block size request 
commit 714b33d15130cbb5ab426456d4e3de842d6c5b8a upstream.

Stephan Mueller reported to me recently a error in random number generation in
the ansi cprng. If several small requests are made that are less than the
instances block size, the remainder for loop code doesn't increment
rand_data_valid in the last iteration, meaning that the last bytes in the
rand_data buffer gets reused on the subsequent smaller-than-a-block request for
random data.

The fix is pretty easy, just re-code the for loop to make sure that
rand_data_valid gets incremented appropriately

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Stephan Mueller <stephan.mueller@atsec.com>
CC: Stephan Mueller <stephan.mueller@atsec.com>
CC: Petr Matousek <pmatouse@redhat.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2013-11-29 11:11:40 -08:00
..
asymmetric_keys X.509: Support parse long form of length octets in Authority Key Identifier 2013-04-22 11:32:19 +09:30
async_tx raid6test: use prandom_bytes() 2013-04-29 18:28:42 -07:00
842.c crypto: 842 - remove .cra_list initialization 2012-09-07 04:17:06 +08:00
Kconfig crypto: blowfish - disable AVX2 implementation 2013-06-05 16:33:23 +08:00
Makefile crypto: add CMAC support to CryptoAPI 2013-04-25 21:01:47 +08:00
ablkcipher.c crypto: user - fix info leaks in report API 2013-02-19 20:27:03 +08:00
aead.c crypto: user - fix info leaks in report API 2013-02-19 20:27:03 +08:00
aes_generic.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
af_alg.c
…
ahash.c crypto: user - fix info leaks in report API 2013-02-19 20:27:03 +08:00
algapi.c crypto: sanitize argument for format string 2013-07-13 11:42:26 -07:00
algboss.c crypto: algboss - Hold ref count on larval 2013-06-25 19:15:17 +08:00
algif_hash.c crypto: algif - suppress sending source address information in recvmsg 2013-04-10 14:26:06 +08:00
algif_skcipher.c crypto: algif - suppress sending source address information in recvmsg 2013-04-10 14:26:06 +08:00
ansi_cprng.c crypto: ansi_cprng - Fix off by one error in non-block size request 2013-11-29 11:11:40 -08:00
anubis.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
api.c crypto: api - Fix race condition in larval lookup 2013-09-26 17:18:01 -07:00
arc4.c crypto: arc4 - improve performance by using u32 for ctx and variables 2012-06-14 10:07:23 +08:00
authenc.c crypto: use ERR_CAST 2013-02-04 21:16:53 +08:00
authencesn.c crypto: use ERR_CAST 2013-02-04 21:16:53 +08:00
blkcipher.c crypto: user - fix info leaks in report API 2013-02-19 20:27:03 +08:00
blowfish_common.c
…
blowfish_generic.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
camellia_generic.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
cast5_generic.c crypto: cast5/cast6 - move lookup tables to shared module 2012-12-06 17:16:26 +08:00
cast6_generic.c crypto: cast5/cast6 - move lookup tables to shared module 2012-12-06 17:16:26 +08:00
cast_common.c crypto: cast5/cast6 - move lookup tables to shared module 2012-12-06 17:16:26 +08:00
cbc.c
…
ccm.c crypto: use ERR_CAST 2013-02-04 21:16:53 +08:00
chainiv.c crypto: use ERR_CAST 2013-02-04 21:16:53 +08:00
cipher.c
…
cmac.c crypto: add CMAC support to CryptoAPI 2013-04-25 21:01:47 +08:00
compress.c
…
crc32.c crypto: crc32 - add crc32 pclmulqdq implementation and wrappers for table implementation 2013-01-20 10:16:45 +11:00
crc32c.c crypto: crc32c should use library implementation 2012-03-23 16:58:38 -07:00
cryptd.c crypto: cryptd - disable softirqs in cryptd_queue_worker to prevent data corruption 2012-10-24 21:21:18 +08:00
crypto_null.c crypto: crypto_null - use crypto_[un]register_algs 2012-08-01 17:47:24 +08:00
crypto_user.c crypto: user - constify netlink dispatch table 2013-03-10 16:46:43 +08:00
crypto_wq.c crypto: add module.h to those files that are explicitly using it 2011-10-31 19:31:11 -04:00
ctr.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2013-02-25 15:56:15 -08:00
cts.c crypto: use ERR_CAST 2013-02-04 21:16:53 +08:00
deflate.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
des_generic.c crypto: des - use crypto_[un]register_algs 2012-08-01 17:47:24 +08:00
ecb.c
…
eseqiv.c
…
fcrypt.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
fips.c
…
gcm.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2013-05-02 14:53:12 -07:00
gf128mul.c
…
ghash-generic.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
hmac.c
…
internal.h crypto: algboss - Hold ref count on larval 2013-06-25 19:15:17 +08:00
khazad.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
krng.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
lrw.c crypto: lrw - add interface for parallelized cipher implementions 2011-11-09 11:50:31 +08:00
lzo.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
md4.c crypto: add module.h to those files that are explicitly using it 2011-10-31 19:31:11 -04:00
md5.c
…
michael_mic.c
…
pcbc.c
…
pcompress.c crypto: user - fix info leaks in report API 2013-02-19 20:27:03 +08:00
pcrypt.c crypto: pcrypt - Use the online cpumask as the default 2012-03-29 19:52:47 +08:00
proc.c crypto: add module.h to those files that are explicitly using it 2011-10-31 19:31:11 -04:00
ripemd.h
…
rmd128.c
…
rmd160.c
…
rmd256.c
…
rmd320.c
…
rng.c crypto: user - fix info leaks in report API 2013-02-19 20:27:03 +08:00
salsa20_generic.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
scatterwalk.c crypto: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:16 +08:00
seed.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
seqiv.c crypto: use ERR_CAST 2013-02-04 21:16:53 +08:00
serpent_generic.c crypto: serpent - use crypto_[un]register_algs 2012-08-01 17:47:25 +08:00
sha1_generic.c
…
sha256_generic.c crypto: sha256 - Expose SHA256 generic routine to be callable externally. 2013-04-03 09:06:31 +08:00
sha512_generic.c crypto: sha512 - Expose generic sha512 routine to be callable from other modules 2013-04-25 21:00:57 +08:00
shash.c crypto: user - fix info leaks in report API 2013-02-19 20:27:03 +08:00
tcrypt.c crypto: tcrypt - add async cipher speed tests for blowfish 2013-04-25 21:09:03 +08:00
tcrypt.h crypto: ctr - make rfc3686 asynchronous block cipher 2013-01-08 07:03:04 +01:00
tea.c crypto: tea - use crypto_[un]register_algs 2012-08-01 17:47:24 +08:00
testmgr.c crypto: camellia - add AVX2/AES-NI/x86_64 assembler implementation of camellia cipher 2013-04-25 21:09:07 +08:00
testmgr.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2013-05-02 14:53:12 -07:00
tgr192.c crypto: tiger - use crypto_[un]register_shashes 2012-08-01 17:47:26 +08:00
twofish_common.c crypto: twofish-x86_64-3way - add lrw support 2011-11-09 11:53:32 +08:00
twofish_generic.c crypto: cleanup - remove unneeded crypto_alg.cra_list initializations 2012-08-01 17:47:27 +08:00
vmac.c crypto: vmac - Make VMAC work when blocks aren't aligned 2012-10-15 22:33:20 +08:00
wp512.c crypto: whirlpool - use crypto_[un]register_shashes 2012-08-01 17:47:27 +08:00
xcbc.c crypto: add module.h to those files that are explicitly using it 2011-10-31 19:31:11 -04:00
xor.c add further __init annotations to crypto/xor.c 2012-10-11 13:42:32 +11:00
xts.c crypto: xts: add interface for parallelized cipher implementations 2011-11-09 11:56:06 +08:00
zlib.c
…