kernel/linux.git/crypto/aead.c, branch v6.6.132

crypto: aead,cipher - zeroize key buffer after use

2024-07-11T10:49:04+00:00

[ Upstream commit 23e4099bdc3c8381992f9eb975c79196d6755210 ] I.G 9.7.B for FIPS 140-3 specifies that variables temporarily holding cryptographic information should be zeroized once they are no longer needed. Accomplish this by using kfree_sensitive for buffers that previously held the private key. Signed-off-by: Hailey Mothershead Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin

crypto: api - Fix CRYPTO_USER checks for report function

2023-05-02T10:22:24+00:00

Checking the config via ifdef incorrectly compiles out the report functions when CRYPTO_USER is set to =m. Fix it by using IS_ENABLED() instead. Fixes: c0f9e01dd266 ("crypto: api - Check CRYPTO_USER instead of NET for report") Signed-off-by: Ondrej Mosnacek Signed-off-by: Herbert Xu

crypto: api - Check CRYPTO_USER instead of NET for report

2023-03-14T09:06:42+00:00

The report function is currently conditionalised on CONFIG_NET. As it's only used by CONFIG_CRYPTO_USER, conditionalising on that instead of CONFIG_NET makes more sense. This gets rid of a rarely used code-path. Signed-off-by: Herbert Xu

crypto: aead - Count error stats differently

2023-03-14T09:06:41+00:00

Move all stat code specific to aead into the aead code. While we're at it, change the stats so that bytes and counts are always incremented even in case of error. This allows the reference counting to be removed as we can now increment the counters prior to the operation. After the operation we simply increase the error count if necessary. This is safe as errors can only occur synchronously (or rather, the existing code already ignored asynchronous errors which are only visible to the callback function). Signed-off-by: Herbert Xu

crypto: algapi - enforce that all instances have a ->free() method

2020-01-09T03:30:58+00:00

All instances need to have a ->free() method, but people could forget to set it and then not notice if the instance is never unregistered. To help detect this bug earlier, don't allow an instance without a ->free() method to be registered, and complain loudly if someone tries to do it. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: algapi - remove crypto_template::{alloc,free}()

2020-01-09T03:30:58+00:00

Now that all templates provide a ->create() method which creates an instance, installs a strongly-typed ->free() method directly to it, and registers it, the older ->alloc() and ->free() methods in 'struct crypto_template' are no longer used. Remove them. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: algapi - pass instance to crypto_grab_spawn()

2020-01-09T03:30:54+00:00

Currently, crypto_spawn::inst is first used temporarily to pass the instance to crypto_grab_spawn(). Then crypto_init_spawn() overwrites it with crypto_spawn::next, which shares the same union. Finally, crypto_spawn::inst is set again when the instance is registered. Make this less convoluted by just passing the instance as an argument to crypto_grab_spawn() instead. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: aead - pass instance to crypto_grab_aead()

2020-01-09T03:30:54+00:00

Initializing a crypto_aead_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_aead(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_aead() take the instance as an argument. To keep the function calls from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into the affected places which weren't already using one. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu

crypto: aead - Split out geniv into its own module

2019-11-17T01:02:38+00:00

If aead is built as a module along with cryptomgr, it creates a dependency loop due to the dependency chain aead => crypto_null => cryptomgr => aead. This is due to the presence of the AEAD geniv code. This code is not really part of the AEAD API but simply support code for IV generators such as seqiv. This patch moves the geniv code into its own module thus breaking the dependency loop. Signed-off-by: Herbert Xu

crypto: aead - Do not allow authsize=0 if auth. alg has digestsize>0

2019-08-15T11:52:14+00:00

Return -EINVAL on an attempt to set the authsize to 0 with an auth. algorithm with a non-zero digestsize (i.e. anything but digest_null) as authenticating the data and then throwing away the result does not make any sense at all. The digestsize zero exception is for use with digest_null for testing purposes only. Signed-off-by: Pascal van Leeuwen Signed-off-by: Herbert Xu