linux-stable.git/crypto/ecc.c, branch v5.15

crypto: ecc - Correct an error in the comments

2021-03-26T09:15:56+00:00

Remove repeated word 'bit' in comments.

Signed-off-by: Meng Yu 
Signed-off-by: Herbert Xu

Merge branch 'ecc'

2021-03-26T08:55:55+00:00

This pulls in the NIST P384/256/192 x509 changes.

crypto: ecc - Add math to support fast NIST P384

2021-03-26T08:41:58+00:00

Add the math needed for NIST P384 and adapt certain functions'
parameters so that the ecc_curve is passed to vli_mmod_fast. This
allows to identify the curve by its name prefix and the appropriate
function for fast mmod calculation can be used.

Summary of changes:

* crypto/ecc.c
  - add vli_mmod_fast_384
  - change some routines to pass ecc_curve forward until vli_mmod_fast

* crypto/ecc.h
  - add ECC_CURVE_NIST_P384_DIGITS
  - change ECC_MAX_DIGITS to P384 size

Signed-off-by: Saulo Alessandre 
Tested-by: Stefan Berger 
Signed-off-by: Herbert Xu

crypto: ecc - Add NIST P384 curve parameters

2021-03-26T08:41:58+00:00

Add the parameters for the NIST P384 curve and define a new curve ID
for it. Make the curve available in ecc_get_curve.

Summary of changes:

* crypto/ecc_curve_defs.h
  - add nist_p384 params

* include/crypto/ecdh.h
  - add ECC_CURVE_NIST_P384

* crypto/ecc.c
  - change ecc_get_curve to accept nist_p384

Signed-off-by: Saulo Alessandre 
Tested-by: Stefan Berger 
Acked-by: Jarkko Sakkinen 
Signed-off-by: Herbert Xu

crypto: ecdsa - Add support for ECDSA signature verification

2021-03-26T08:41:58+00:00

Add support for parsing the parameters of a NIST P256 or NIST P192 key.
Enable signature verification using these keys. The new module is
enabled with CONFIG_ECDSA:
  Elliptic Curve Digital Signature Algorithm (NIST P192, P256 etc.)
  is A NIST cryptographic standard algorithm. Only signature verification
  is implemented.

Cc: Herbert Xu 
Cc: "David S. Miller" 
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Stefan Berger 
Signed-off-by: Herbert Xu

crypto: ecc - add curve25519 params and expose them

2021-03-12T13:04:04+00:00

1. Add curve 25519 parameters in 'crypto/ecc_curve_defs.h';
2. Add curve25519 interface 'ecc_get_curve25519_param' in
   'include/crypto/ecc_curve.h', to make its parameters be
   exposed to everyone in kernel tree.

Signed-off-by: Meng Yu 
Reviewed-by: Zaibo Xu 
Signed-off-by: Herbert Xu

crypto: ecc - expose ecc curves

2021-03-12T13:04:03+00:00

Move 'ecc_get_curve' to 'include/crypto/ecc_curve.h', so everyone
in kernel tree can easily get ecc curve params;

Signed-off-by: Meng Yu 
Reviewed-by: Zaibo Xu 
Signed-off-by: Herbert Xu

mm, treewide: rename kzfree() to kfree_sensitive()

2020-08-07T18:33:22+00:00

As said by Linus:

  A symmetric naming is only helpful if it implies symmetries in use.
  Otherwise it's actively misleading.

  In "kzalloc()", the z is meaningful and an important part of what the
  caller wants.

  In "kzfree()", the z is actively detrimental, because maybe in the
  future we really _might_ want to use that "memfill(0xdeadbeef)" or
  something. The "zero" part of the interface isn't even _relevant_.

The main reason that kzfree() exists is to clear sensitive information
that should not be leaked to other future users of the same memory
objects.

Rename kzfree() to kfree_sensitive() to follow the example of the recently
added kvfree_sensitive() and make the intention of the API more explicit.
In addition, memzero_explicit() is used to clear the memory to make sure
that it won't get optimized away by the compiler.

The renaming is done by using the command sequence:

  git grep -w --name-only kzfree |\
  xargs sed -i 's/kzfree/kfree_sensitive/'

followed by some editing of the kfree_sensitive() kerneldoc and adding
a kzfree backward compatibility macro in slab.h.

[akpm@linux-foundation.org: fs/crypto/inline_crypt.c needs linux/slab.h]
[akpm@linux-foundation.org: fix fs/crypto/inline_crypt.c some more]

Suggested-by: Joe Perches 
Signed-off-by: Waiman Long 
Signed-off-by: Andrew Morton 
Acked-by: David Howells 
Acked-by: Michal Hocko 
Acked-by: Johannes Weiner 
Cc: Jarkko Sakkinen 
Cc: James Morris 
Cc: "Serge E. Hallyn" 
Cc: Joe Perches 
Cc: Matthew Wilcox 
Cc: David Rientjes 
Cc: Dan Carpenter 
Cc: "Jason A . Donenfeld" 
Link: http://lkml.kernel.org/r/20200616154311.12314-3-longman@redhat.com
Signed-off-by: Linus Torvalds

crypto: ecc - SP800-56A rev 3 local public key validation

2020-07-31T08:08:59+00:00

After the generation of a local public key, SP800-56A rev 3 section
5.6.2.1.3 mandates a validation of that key with a full validation
compliant to section 5.6.2.3.3.

Only if the full validation passes, the key is allowed to be used.

The patch adds the full key validation compliant to 5.6.2.3.3 and
performs the required check on the generated public key.

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

crypto: ecdh - check validity of Z before export

2020-07-31T08:08:58+00:00

SP800-56A rev3 section 5.7.1.2 step 2 mandates that the validity of the
calculated shared secret is verified before the data is returned to the
caller. Thus, the export function and the validity check functions are
reversed. In addition, the sensitive variables of priv and rand_z are
zeroized.

Signed-off-by: Stephan Mueller 
Reviewed-by: Vitaly Chikunov 
Acked-by: Neil Horman 
Signed-off-by: Herbert Xu