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* crypto: shash - remove useless setting of type flagsEric Biggers2018-07-081-1/+0
| | | | | | | | | | | | | | | Many shash algorithms set .cra_flags = CRYPTO_ALG_TYPE_SHASH. But this is redundant with the C structure type ('struct shash_alg'), and crypto_register_shash() already sets the type flag automatically, clearing any type flag that was already there. Apparently the useless assignment has just been copy+pasted around. So, remove the useless assignment from all the shash algorithms. This patch shouldn't change any actual behavior. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ghash - remove checks for key being setEric Biggers2018-01-121-6/+0
| | | | | | | | Now that the crypto API prevents a keyed hash from being used without setting the key, there's no need for GHASH to do this check itself. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ghash-generic - move common definitions to a new header fileMarcelo Cerri2016-10-021-12/+1
| | | | | | | | | | Move common values and types used by ghash-generic to a new header file so drivers can directly use ghash-generic as a fallback implementation. Fixes: cc333cd68dfa ("crypto: vmx - Adding GHASH routines for VMX module") Cc: stable@vger.kernel.org Signed-off-by: Marcelo Cerri <marcelo.cerri@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: add missing crypto module aliasesMathias Krause2015-01-131-0/+1
| | | | | | | | | | | | | | | | | | | | | | Commit 5d26a105b5a7 ("crypto: prefix module autoloading with "crypto-"") changed the automatic module loading when requesting crypto algorithms to prefix all module requests with "crypto-". This requires all crypto modules to have a crypto specific module alias even if their file name would otherwise match the requested crypto algorithm. Even though commit 5d26a105b5a7 added those aliases for a vast amount of modules, it was missing a few. Add the required MODULE_ALIAS_CRYPTO annotations to those files to make them get loaded automatically, again. This fixes, e.g., requesting 'ecb(blowfish-generic)', which used to work with kernels v3.18 and below. Also change MODULE_ALIAS() lines to MODULE_ALIAS_CRYPTO(). The former won't work for crypto modules any more. Fixes: 5d26a105b5a7 ("crypto: prefix module autoloading with "crypto-"") Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: prefix module autoloading with "crypto-"Kees Cook2014-11-241-1/+1
| | | | | | | | | | | This prefixes all crypto module loading with "crypto-" so we never run the risk of exposing module auto-loading to userspace via a crypto API, as demonstrated by Mathias Krause: https://lkml.org/lkml/2013/3/4/70 Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: cleanup - remove unneeded crypto_alg.cra_list initializationsJussi Kivilinna2012-08-011-1/+0
| | | | | | | | | | | Initialization of cra_list is currently mixed, most ciphers initialize this field and most shashes do not. Initialization however is not needed at all since cra_list is initialized/overwritten in __crypto_register_alg() with list_add(). Therefore perform cleanup to remove all unneeded initializations of this field in 'crypto/'. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ghash - Avoid null pointer dereference if no key is setNick Bowler2011-10-211-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ghash_update function passes a pointer to gf128mul_4k_lle which will be NULL if ghash_setkey is not called or if the most recent call to ghash_setkey failed to allocate memory. This causes an oops. Fix this up by returning an error code in the null case. This is trivially triggered from unprivileged userspace through the AF_ALG interface by simply writing to the socket without setting a key. The ghash_final function has a similar issue, but triggering it requires a memory allocation failure in ghash_setkey _after_ at least one successful call to ghash_update. BUG: unable to handle kernel NULL pointer dereference at 00000670 IP: [<d88c92d4>] gf128mul_4k_lle+0x23/0x60 [gf128mul] *pde = 00000000 Oops: 0000 [#1] PREEMPT SMP Modules linked in: ghash_generic gf128mul algif_hash af_alg nfs lockd nfs_acl sunrpc bridge ipv6 stp llc Pid: 1502, comm: hashatron Tainted: G W 3.1.0-rc9-00085-ge9308cf #32 Bochs Bochs EIP: 0060:[<d88c92d4>] EFLAGS: 00000202 CPU: 0 EIP is at gf128mul_4k_lle+0x23/0x60 [gf128mul] EAX: d69db1f0 EBX: d6b8ddac ECX: 00000004 EDX: 00000000 ESI: 00000670 EDI: d6b8ddac EBP: d6b8ddc8 ESP: d6b8dda4 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process hashatron (pid: 1502, ti=d6b8c000 task=d6810000 task.ti=d6b8c000) Stack: 00000000 d69db1f0 00000163 00000000 d6b8ddc8 c101a520 d69db1f0 d52aa000 00000ff0 d6b8dde8 d88d310f d6b8a3f8 d52aa000 00001000 d88d502c d6b8ddfc 00001000 d6b8ddf4 c11676ed d69db1e8 d6b8de24 c11679ad d52aa000 00000000 Call Trace: [<c101a520>] ? kmap_atomic_prot+0x37/0xa6 [<d88d310f>] ghash_update+0x85/0xbe [ghash_generic] [<c11676ed>] crypto_shash_update+0x18/0x1b [<c11679ad>] shash_ahash_update+0x22/0x36 [<c11679cc>] shash_async_update+0xb/0xd [<d88ce0ba>] hash_sendpage+0xba/0xf2 [algif_hash] [<c121b24c>] kernel_sendpage+0x39/0x4e [<d88ce000>] ? 0xd88cdfff [<c121b298>] sock_sendpage+0x37/0x3e [<c121b261>] ? kernel_sendpage+0x4e/0x4e [<c10b4dbc>] pipe_to_sendpage+0x56/0x61 [<c10b4e1f>] splice_from_pipe_feed+0x58/0xcd [<c10b4d66>] ? splice_from_pipe_begin+0x10/0x10 [<c10b51f5>] __splice_from_pipe+0x36/0x55 [<c10b4d66>] ? splice_from_pipe_begin+0x10/0x10 [<c10b6383>] splice_from_pipe+0x51/0x64 [<c10b63c2>] ? default_file_splice_write+0x2c/0x2c [<c10b63d5>] generic_splice_sendpage+0x13/0x15 [<c10b4d66>] ? splice_from_pipe_begin+0x10/0x10 [<c10b527f>] do_splice_from+0x5d/0x67 [<c10b6865>] sys_splice+0x2bf/0x363 [<c129373b>] ? sysenter_exit+0xf/0x16 [<c104dc1e>] ? trace_hardirqs_on_caller+0x10e/0x13f [<c129370c>] sysenter_do_call+0x12/0x32 Code: 83 c4 0c 5b 5e 5f c9 c3 55 b9 04 00 00 00 89 e5 57 8d 7d e4 56 53 8d 5d e4 83 ec 18 89 45 e0 89 55 dc 0f b6 70 0f c1 e6 04 01 d6 <f3> a5 be 0f 00 00 00 4e 89 d8 e8 48 ff ff ff 8b 45 e0 89 da 0f EIP: [<d88c92d4>] gf128mul_4k_lle+0x23/0x60 [gf128mul] SS:ESP 0068:d6b8dda4 CR2: 0000000000000670 ---[ end trace 4eaa2a86a8e2da24 ]--- note: hashatron[1502] exited with preempt_count 1 BUG: scheduling while atomic: hashatron/1502/0x10000002 INFO: lockdep is turned off. [...] Signed-off-by: Nick Bowler <nbowler@elliptictech.com> Cc: stable@kernel.org [2.6.37+] Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: ghash - Add GHASH digest algorithm for GCMHuang Ying2009-08-061-0/+170
GHASH is implemented as a shash algorithm. The actual implementation is copied from gcm.c. This makes it possible to add architecture/hardware accelerated GHASH implementation. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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