linux-toradex.git/crypto/ansi_cprng.c, branch v6.6-rc3

crypto: remove cipher routines from public crypto API

2021-01-02T21:41:35+00:00

The cipher routines in the crypto API are mostly intended for templates
implementing skcipher modes generically in software, and shouldn't be
used outside of the crypto subsystem. So move the prototypes and all
related definitions to a new header file under include/crypto/internal.
Also, let's use the new module namespace feature to move the symbol
exports into a new namespace CRYPTO_INTERNAL.

Signed-off-by: Ard Biesheuvel 
Acked-by: Eric Biggers 
Signed-off-by: Herbert Xu

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 42

2019-05-24T15:27:12+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520170858.098509240@linutronix.de
Signed-off-by: Greg Kroah-Hartman

crypto: run initcalls for generic implementations earlier

2019-04-18T14:15:03+00:00

Use subsys_initcall for registration of all templates and generic
algorithm implementations, rather than module_init.  Then change
cryptomgr to use arch_initcall, to place it before the subsys_initcalls.

This is needed so that when both a generic and optimized implementation
of an algorithm are built into the kernel (not loadable modules), the
generic implementation is registered before the optimized one.
Otherwise, the self-tests for the optimized implementation are unable to
allocate the generic implementation for the new comparison fuzz tests.

Note that on arm, a side effect of this change is that self-tests for
generic implementations may run before the unaligned access handler has
been installed.  So, unaligned accesses will crash the kernel.  This is
arguably a good thing as it makes it easier to detect that type of bug.

Signed-off-by: Eric Biggers 
Signed-off-by: Herbert Xu

crypto: ansi_cprng - Convert to new rng interface

2015-04-22T01:30:18+00:00

This patch ocnverts the ANSI CPRNG implementation to the new
low-level rng interface.

Signed-off-by: Herbert Xu 
Acked-by: Neil Horman

crypto: ansi_cprng - Remove bogus inclusion of internal.h

2015-04-22T01:30:17+00:00

The file internal.h is only meant to be used by internel API
implementation and not algorithm implementations.  In fact it
isn't even needed here so this patch removes it.

Signed-off-by: Herbert Xu 
Acked-by: Neil Horman

crypto: rng - RNGs must return 0 in success case

2015-03-09T10:06:18+00:00

Change the RNGs to always return 0 in success case.

This patch ensures that seqiv.c works with RNGs other than krng. seqiv
expects that any return code other than 0 is an error. Without the
patch, rfc4106(gcm(aes)) will not work when using a DRBG or an ANSI
X9.31 RNG.

Signed-off-by: Stephan Mueller 
Signed-off-by: Herbert Xu

crypto: add missing crypto module aliases

2015-01-13T11:29:11+00:00

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 
Signed-off-by: Mathias Krause 
Signed-off-by: Herbert Xu

crypto: prefix module autoloading with "crypto-"

2014-11-24T14:43:57+00:00

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 
Signed-off-by: Herbert Xu

crypto: ansi_cprng - Fix off by one error in non-block size request

2013-09-23T20:02:23+00:00

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 
Reported-by: Stephan Mueller 
CC: Stephan Mueller 
CC: Petr Matousek 
CC: Herbert Xu 
CC: "David S. Miller" 
Signed-off-by: Herbert Xu

crypto: ansi_cprng - use crypto_[un]register_algs

2012-08-01T09:47:25+00:00

Combine all crypto_alg to be registered and use new crypto_[un]register_algs
functions. This simplifies init/exit code.

Cc: Neil Horman 
Signed-off-by: Jussi Kivilinna 
Signed-off-by: Herbert Xu