Commit 9872238e authored by Andy Polyakov's avatar Andy Polyakov
Browse files

poly1305/poly1305_base2_44.c: clarify shift boundary condition. 



Reviewed-by: default avatarMatt Caswell <matt@openssl.org>
parent 6f553edb

crypto/poly1305/poly1305_base2_44.c

+2 −2
Original line number Diff line number Diff line
@@ -117,8 +117,8 @@ void poly1305_blocks(void *ctx, const unsigned char *inp, size_t len, 


        /* "lazy" reduction step */

        h0 = (u64)d0 & 0x0fffffffffff;

        h1 = (u64)(d1 += d0 >> 44) & 0x0fffffffffff;

        h2 = (u64)(d2 += d1 >> 44) & 0x03ffffffffff; /* last digit is 42 bits */

        h1 = (u64)(d1 += (u64)(d0 >> 44)) & 0x0fffffffffff;

        h2 = (u64)(d2 += (u64)(d1 >> 44)) & 0x03ffffffffff; /* last 42 bits */



        c = (d2 >> 42);

        h0 += c + (c << 2);