korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-27 14:14:24 +08:00
Code Issues Packages Projects Releases Wiki Activity

crypto: poly1305 - use unaligned access macros to output digest

Browse Source 
Currently the only part of poly1305-generic which is assuming special
alignment is the part where the final digest is written.  Switch this
over to the unaligned access macros so that we'll be able to remove the
cra_alignmask.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2017-12-29 10:10:24 -06:00 committed by Herbert Xu
parent 8b55107c57
commit fcfbeedf79
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
crypto/poly1305_generic.c
View File

@ -210,7 +210,6 @@ EXPORT_SYMBOL_GPL(crypto_poly1305_update);
int crypto_poly1305_final(struct shash_desc *desc, u8 *dst) int crypto_poly1305_final(struct shash_desc *desc, u8 *dst)
{ {
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc); struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
__le32 *mac = (__le32 *)dst;
u32 h0, h1, h2, h3, h4; u32 h0, h1, h2, h3, h4;
u32 g0, g1, g2, g3, g4; u32 g0, g1, g2, g3, g4;
u32 mask; u32 mask;
@ -267,10 +266,10 @@ int crypto_poly1305_final(struct shash_desc *desc, u8 *dst)
h3 = (h3 >> 18) | (h4 << 8); h3 = (h3 >> 18) | (h4 << 8);
/* mac = (h + s) % (2^128) */ /* mac = (h + s) % (2^128) */
f = (f >> 32) + h0 + dctx->s[0]; mac[0] = cpu_to_le32(f); f = (f >> 32) + h0 + dctx->s[0]; put_unaligned_le32(f, dst + 0);
f = (f >> 32) + h1 + dctx->s[1]; mac[1] = cpu_to_le32(f); f = (f >> 32) + h1 + dctx->s[1]; put_unaligned_le32(f, dst + 4);
f = (f >> 32) + h2 + dctx->s[2]; mac[2] = cpu_to_le32(f); f = (f >> 32) + h2 + dctx->s[2]; put_unaligned_le32(f, dst + 8);
f = (f >> 32) + h3 + dctx->s[3]; mac[3] = cpu_to_le32(f); f = (f >> 32) + h3 + dctx->s[3]; put_unaligned_le32(f, dst + 12);
return 0; return 0;
} }