From: Eric Biggers Date: Fri, 29 Dec 2017 16:10:24 +0000 (-0600) Subject: crypto: poly1305 - use unaligned access macros to output digest X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fcfbeedf79adc7abaea35b0f88ec23cf546d3b77;p=linux.git crypto: poly1305 - use unaligned access macros to output digest 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 Signed-off-by: Herbert Xu --- diff --git a/crypto/poly1305_generic.c b/crypto/poly1305_generic.c index b1c2d57dc734a..d752901ba0bca 100644 --- a/crypto/poly1305_generic.c +++ b/crypto/poly1305_generic.c @@ -210,7 +210,6 @@ 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 *mac = (__le32 *)dst; u32 h0, h1, h2, h3, h4; u32 g0, g1, g2, g3, g4; u32 mask; @@ -267,10 +266,10 @@ int crypto_poly1305_final(struct shash_desc *desc, u8 *dst) h3 = (h3 >> 18) | (h4 << 8); /* mac = (h + s) % (2^128) */ - f = (f >> 32) + h0 + dctx->s[0]; mac[0] = cpu_to_le32(f); - f = (f >> 32) + h1 + dctx->s[1]; mac[1] = cpu_to_le32(f); - f = (f >> 32) + h2 + dctx->s[2]; mac[2] = cpu_to_le32(f); - f = (f >> 32) + h3 + dctx->s[3]; mac[3] = cpu_to_le32(f); + f = (f >> 32) + h0 + dctx->s[0]; put_unaligned_le32(f, dst + 0); + f = (f >> 32) + h1 + dctx->s[1]; put_unaligned_le32(f, dst + 4); + f = (f >> 32) + h2 + dctx->s[2]; put_unaligned_le32(f, dst + 8); + f = (f >> 32) + h3 + dctx->s[3]; put_unaligned_le32(f, dst + 12); return 0; }