mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 14:37:57 +00:00
d540725871
Without this patch, the chacha block counter is not incremented on neon rounds, resulting in incorrect calculations and corrupt packets. This also switches to using `--no-numbered --zero-commit` so that future diffs are smaller. Reported-by: Hans Geiblinger <cybrnook2002@yahoo.com> Reviewed-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com> Cc: David Bauer <mail@david-bauer.net> Cc: Petr Štetiar <ynezz@true.cz> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
225 lines
7.0 KiB
Diff
225 lines
7.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Ard Biesheuvel <ardb@kernel.org>
|
|
Date: Fri, 8 Nov 2019 13:22:21 +0100
|
|
Subject: [PATCH] crypto: poly1305 - expose init/update/final library interface
|
|
|
|
commit a1d93064094cc5e24d64e35cf093e7191d0c9344 upstream.
|
|
|
|
Expose the existing generic Poly1305 code via a init/update/final
|
|
library interface so that callers are not required to go through
|
|
the crypto API's shash abstraction to access it. At the same time,
|
|
make some preparations so that the library implementation can be
|
|
superseded by an accelerated arch-specific version in the future.
|
|
|
|
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
|
|
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
|
|
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
|
|
---
|
|
crypto/poly1305_generic.c | 22 +-----------
|
|
include/crypto/poly1305.h | 38 +++++++++++++++++++-
|
|
lib/crypto/Kconfig | 26 ++++++++++++++
|
|
lib/crypto/poly1305.c | 74 +++++++++++++++++++++++++++++++++++++++
|
|
4 files changed, 138 insertions(+), 22 deletions(-)
|
|
|
|
--- a/crypto/poly1305_generic.c
|
|
+++ b/crypto/poly1305_generic.c
|
|
@@ -85,31 +85,11 @@ EXPORT_SYMBOL_GPL(crypto_poly1305_update
|
|
int crypto_poly1305_final(struct shash_desc *desc, u8 *dst)
|
|
{
|
|
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
|
|
- __le32 digest[4];
|
|
- u64 f = 0;
|
|
|
|
if (unlikely(!dctx->sset))
|
|
return -ENOKEY;
|
|
|
|
- if (unlikely(dctx->buflen)) {
|
|
- dctx->buf[dctx->buflen++] = 1;
|
|
- memset(dctx->buf + dctx->buflen, 0,
|
|
- POLY1305_BLOCK_SIZE - dctx->buflen);
|
|
- poly1305_core_blocks(&dctx->h, dctx->r, dctx->buf, 1, 0);
|
|
- }
|
|
-
|
|
- poly1305_core_emit(&dctx->h, digest);
|
|
-
|
|
- /* mac = (h + s) % (2^128) */
|
|
- f = (f >> 32) + le32_to_cpu(digest[0]) + dctx->s[0];
|
|
- put_unaligned_le32(f, dst + 0);
|
|
- f = (f >> 32) + le32_to_cpu(digest[1]) + dctx->s[1];
|
|
- put_unaligned_le32(f, dst + 4);
|
|
- f = (f >> 32) + le32_to_cpu(digest[2]) + dctx->s[2];
|
|
- put_unaligned_le32(f, dst + 8);
|
|
- f = (f >> 32) + le32_to_cpu(digest[3]) + dctx->s[3];
|
|
- put_unaligned_le32(f, dst + 12);
|
|
-
|
|
+ poly1305_final_generic(dctx, dst);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(crypto_poly1305_final);
|
|
--- a/include/crypto/poly1305.h
|
|
+++ b/include/crypto/poly1305.h
|
|
@@ -35,7 +35,43 @@ struct poly1305_desc_ctx {
|
|
/* accumulator */
|
|
struct poly1305_state h;
|
|
/* key */
|
|
- struct poly1305_key r[1];
|
|
+ struct poly1305_key r[CONFIG_CRYPTO_LIB_POLY1305_RSIZE];
|
|
};
|
|
|
|
+void poly1305_init_arch(struct poly1305_desc_ctx *desc, const u8 *key);
|
|
+void poly1305_init_generic(struct poly1305_desc_ctx *desc, const u8 *key);
|
|
+
|
|
+static inline void poly1305_init(struct poly1305_desc_ctx *desc, const u8 *key)
|
|
+{
|
|
+ if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
|
|
+ poly1305_init_arch(desc, key);
|
|
+ else
|
|
+ poly1305_init_generic(desc, key);
|
|
+}
|
|
+
|
|
+void poly1305_update_arch(struct poly1305_desc_ctx *desc, const u8 *src,
|
|
+ unsigned int nbytes);
|
|
+void poly1305_update_generic(struct poly1305_desc_ctx *desc, const u8 *src,
|
|
+ unsigned int nbytes);
|
|
+
|
|
+static inline void poly1305_update(struct poly1305_desc_ctx *desc,
|
|
+ const u8 *src, unsigned int nbytes)
|
|
+{
|
|
+ if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
|
|
+ poly1305_update_arch(desc, src, nbytes);
|
|
+ else
|
|
+ poly1305_update_generic(desc, src, nbytes);
|
|
+}
|
|
+
|
|
+void poly1305_final_arch(struct poly1305_desc_ctx *desc, u8 *digest);
|
|
+void poly1305_final_generic(struct poly1305_desc_ctx *desc, u8 *digest);
|
|
+
|
|
+static inline void poly1305_final(struct poly1305_desc_ctx *desc, u8 *digest)
|
|
+{
|
|
+ if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
|
|
+ poly1305_final_arch(desc, digest);
|
|
+ else
|
|
+ poly1305_final_generic(desc, digest);
|
|
+}
|
|
+
|
|
#endif
|
|
--- a/lib/crypto/Kconfig
|
|
+++ b/lib/crypto/Kconfig
|
|
@@ -37,8 +37,34 @@ config CRYPTO_LIB_CHACHA
|
|
config CRYPTO_LIB_DES
|
|
tristate
|
|
|
|
+config CRYPTO_LIB_POLY1305_RSIZE
|
|
+ int
|
|
+ default 1
|
|
+
|
|
+config CRYPTO_ARCH_HAVE_LIB_POLY1305
|
|
+ tristate
|
|
+ help
|
|
+ Declares whether the architecture provides an arch-specific
|
|
+ accelerated implementation of the Poly1305 library interface,
|
|
+ either builtin or as a module.
|
|
+
|
|
config CRYPTO_LIB_POLY1305_GENERIC
|
|
tristate
|
|
+ help
|
|
+ This symbol can be depended upon by arch implementations of the
|
|
+ Poly1305 library interface that require the generic code as a
|
|
+ fallback, e.g., for SIMD implementations. If no arch specific
|
|
+ implementation is enabled, this implementation serves the users
|
|
+ of CRYPTO_LIB_POLY1305.
|
|
+
|
|
+config CRYPTO_LIB_POLY1305
|
|
+ tristate "Poly1305 library interface"
|
|
+ depends on CRYPTO_ARCH_HAVE_LIB_POLY1305 || !CRYPTO_ARCH_HAVE_LIB_POLY1305
|
|
+ select CRYPTO_LIB_POLY1305_GENERIC if CRYPTO_ARCH_HAVE_LIB_POLY1305=n
|
|
+ help
|
|
+ Enable the Poly1305 library interface. This interface may be fulfilled
|
|
+ by either the generic implementation or an arch-specific one, if one
|
|
+ is available and enabled.
|
|
|
|
config CRYPTO_LIB_SHA256
|
|
tristate
|
|
--- a/lib/crypto/poly1305.c
|
|
+++ b/lib/crypto/poly1305.c
|
|
@@ -154,5 +154,79 @@ void poly1305_core_emit(const struct pol
|
|
}
|
|
EXPORT_SYMBOL_GPL(poly1305_core_emit);
|
|
|
|
+void poly1305_init_generic(struct poly1305_desc_ctx *desc, const u8 *key)
|
|
+{
|
|
+ poly1305_core_setkey(desc->r, key);
|
|
+ desc->s[0] = get_unaligned_le32(key + 16);
|
|
+ desc->s[1] = get_unaligned_le32(key + 20);
|
|
+ desc->s[2] = get_unaligned_le32(key + 24);
|
|
+ desc->s[3] = get_unaligned_le32(key + 28);
|
|
+ poly1305_core_init(&desc->h);
|
|
+ desc->buflen = 0;
|
|
+ desc->sset = true;
|
|
+ desc->rset = 1;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(poly1305_init_generic);
|
|
+
|
|
+void poly1305_update_generic(struct poly1305_desc_ctx *desc, const u8 *src,
|
|
+ unsigned int nbytes)
|
|
+{
|
|
+ unsigned int bytes;
|
|
+
|
|
+ if (unlikely(desc->buflen)) {
|
|
+ bytes = min(nbytes, POLY1305_BLOCK_SIZE - desc->buflen);
|
|
+ memcpy(desc->buf + desc->buflen, src, bytes);
|
|
+ src += bytes;
|
|
+ nbytes -= bytes;
|
|
+ desc->buflen += bytes;
|
|
+
|
|
+ if (desc->buflen == POLY1305_BLOCK_SIZE) {
|
|
+ poly1305_core_blocks(&desc->h, desc->r, desc->buf, 1, 1);
|
|
+ desc->buflen = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (likely(nbytes >= POLY1305_BLOCK_SIZE)) {
|
|
+ poly1305_core_blocks(&desc->h, desc->r, src,
|
|
+ nbytes / POLY1305_BLOCK_SIZE, 1);
|
|
+ src += nbytes - (nbytes % POLY1305_BLOCK_SIZE);
|
|
+ nbytes %= POLY1305_BLOCK_SIZE;
|
|
+ }
|
|
+
|
|
+ if (unlikely(nbytes)) {
|
|
+ desc->buflen = nbytes;
|
|
+ memcpy(desc->buf, src, nbytes);
|
|
+ }
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(poly1305_update_generic);
|
|
+
|
|
+void poly1305_final_generic(struct poly1305_desc_ctx *desc, u8 *dst)
|
|
+{
|
|
+ __le32 digest[4];
|
|
+ u64 f = 0;
|
|
+
|
|
+ if (unlikely(desc->buflen)) {
|
|
+ desc->buf[desc->buflen++] = 1;
|
|
+ memset(desc->buf + desc->buflen, 0,
|
|
+ POLY1305_BLOCK_SIZE - desc->buflen);
|
|
+ poly1305_core_blocks(&desc->h, desc->r, desc->buf, 1, 0);
|
|
+ }
|
|
+
|
|
+ poly1305_core_emit(&desc->h, digest);
|
|
+
|
|
+ /* mac = (h + s) % (2^128) */
|
|
+ f = (f >> 32) + le32_to_cpu(digest[0]) + desc->s[0];
|
|
+ put_unaligned_le32(f, dst + 0);
|
|
+ f = (f >> 32) + le32_to_cpu(digest[1]) + desc->s[1];
|
|
+ put_unaligned_le32(f, dst + 4);
|
|
+ f = (f >> 32) + le32_to_cpu(digest[2]) + desc->s[2];
|
|
+ put_unaligned_le32(f, dst + 8);
|
|
+ f = (f >> 32) + le32_to_cpu(digest[3]) + desc->s[3];
|
|
+ put_unaligned_le32(f, dst + 12);
|
|
+
|
|
+ *desc = (struct poly1305_desc_ctx){};
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(poly1305_final_generic);
|
|
+
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Martin Willi <martin@strongswan.org>");
|