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| author |   Nathan Huckleberry <nhuck@google.com> | 2022-05-20 18:14:54 +0000 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2022-06-10 16:40:17 +0800 |
| commit | f3c923a09c4c4f5861b1ed53cf75673992a6ba68 (patch) | |
| tree | cf65bb77fe12ef20e9b0afe2f8704666d17b4134 /include/crypto | |
| parent | crypto: xctr - Add XCTR support (diff) | |
| download | linux-dev-f3c923a09c4c4f5861b1ed53cf75673992a6ba68.tar.xz linux-dev-f3c923a09c4c4f5861b1ed53cf75673992a6ba68.zip | |
crypto: polyval - Add POLYVAL support
Add support for POLYVAL, an ε-Δ-universal hash function similar to
GHASH. This patch only uses POLYVAL as a component to implement HCTR2
mode. It should be noted that POLYVAL was originally specified for use
in AES-GCM-SIV (RFC 8452), but the kernel does not currently support
this mode.
POLYVAL is implemented as an shash algorithm. The implementation is
modified from ghash-generic.c.
For more information on POLYVAL see:
Length-preserving encryption with HCTR2:
https://eprint.iacr.org/2021/1441.pdf
AES-GCM-SIV: Nonce Misuse-Resistant Authenticated Encryption:
https://datatracker.ietf.org/doc/html/rfc8452
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/polyval.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/crypto/polyval.h b/include/crypto/polyval.h new file mode 100644 index 000000000000..b14c38aa9166 --- /dev/null +++ b/include/crypto/polyval.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Common values for the Polyval hash algorithm + * + * Copyright 2021 Google LLC + */ + +#ifndef _CRYPTO_POLYVAL_H +#define _CRYPTO_POLYVAL_H + +#include <linux/types.h> +#include <linux/crypto.h> + +#define POLYVAL_BLOCK_SIZE 16 +#define POLYVAL_DIGEST_SIZE 16 + +#endif |