From 4bb166a2a83efc62e94cac7e687a9e6f7586833c Mon Sep 17 00:00:00 2001
From: Viktor Szakats <vszakats@users.noreply.github.com>
Date: Thu, 4 Mar 2021 22:10:07 +0100
Subject: [PATCH] bcrypt_pbkdf.c: fix clang10 false positive warning (#563)

File: bcrypt_pbkdf.c

Notes:
blf_enc() takes a number of 64-bit blocks to encrypt, but using
sizeof(uint64_t) in the calculation triggers a warning with
clang 10 because the actual data type is uint32_t. Pass
BCRYPT_BLOCKS / 2 for the number of blocks like libc bcrypt(3)
does.

Ref: https://github.com/openbsd/src/commit/04a2240bd8f465bcae6b595d912af3e2965856de

Fixes #562

Credit:
Viktor Szakats
---
 src/bcrypt_pbkdf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bcrypt_pbkdf.c b/src/bcrypt_pbkdf.c
index f9a97580..f782bcac 100644
--- a/src/bcrypt_pbkdf.c
+++ b/src/bcrypt_pbkdf.c
@@ -81,7 +81,7 @@ bcrypt_hash(uint8_t *sha2pass, uint8_t *sha2salt, uint8_t *out)
         cdata[i] = Blowfish_stream2word(ciphertext, sizeof(ciphertext),
                                         &j);
     for(i = 0; i < 64; i++)
-        blf_enc(&state, cdata, sizeof(cdata) / sizeof(uint64_t));
+        blf_enc(&state, cdata, BCRYPT_BLOCKS / 2);
 
     /* copy out */
     for(i = 0; i < BCRYPT_BLOCKS; i++) {