From: David Goulet Date: Tue, 15 Mar 2022 18:00:00 +0000 (-0400) Subject: crypto: Clarifying comment for the random hostname calculation X-Git-Tag: tor-0.4.7.5-alpha~13 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf93d352095d252baf4cba07e51cb9a84ef8d9de;p=thirdparty%2Ftor.git crypto: Clarifying comment for the random hostname calculation Closes #40520 Signed-off-by: David Goulet --- diff --git a/src/lib/crypt_ops/crypto_rand.c b/src/lib/crypt_ops/crypto_rand.c index 5bf3a65b3b..f39ee6c24f 100644 --- a/src/lib/crypt_ops/crypto_rand.c +++ b/src/lib/crypt_ops/crypto_rand.c @@ -568,6 +568,8 @@ crypto_random_hostname(int min_rand_len, int max_rand_len, const char *prefix, prefixlen = strlen(prefix); resultlen = prefixlen + strlen(suffix) + randlen + 16; + /* (x+(n-1))/n is an idiom for dividing x by n, rounding up to the nearest + * integer and thus why this construction. */ rand_bytes_len = ((randlen*5)+7)/8; if (rand_bytes_len % 5) rand_bytes_len += 5 - (rand_bytes_len%5);