void-packages/srcpkgs/musl/patches/99d5098a885feae3ae8c32b4073...

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From 99d5098a885feae3ae8c32b407350d8ca85dd178 Mon Sep 17 00:00:00 2001
From: Julien Ramseier <j.ramseier@gmail.com>
Date: Sun, 18 Oct 2020 12:15:06 -0400
Subject: update crypt_blowfish to support $2b$ prefix
Merge changes from Solar Designer's crypt_blowfish v1.3. This makes
crypt_blowfish fully compatible with OpenBSD's bcrypt by adding
support for the $2b$ prefix (which behaves the same as
crypt_blowfish's $2y$).
---
src/crypt/crypt_blowfish.c | 38 +++++++++++++++++++++++---------------
1 file changed, 23 insertions(+), 15 deletions(-)
(limited to 'src/crypt/crypt_blowfish.c')
diff --git a/src/crypt/crypt_blowfish.c b/src/crypt/crypt_blowfish.c
index d3f79851..d722607b 100644
--- a/src/crypt/crypt_blowfish.c
+++ b/src/crypt/crypt_blowfish.c
@@ -15,7 +15,7 @@
* No copyright is claimed, and the software is hereby placed in the public
* domain. In case this attempt to disclaim copyright and place the software
* in the public domain is deemed null and void, then the software is
- * Copyright (c) 1998-2012 Solar Designer and it is hereby released to the
+ * Copyright (c) 1998-2014 Solar Designer and it is hereby released to the
* general public under the following terms:
*
* Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
* you place this code and any modifications you make under a license
* of your choice.
*
- * This implementation is mostly compatible with OpenBSD's bcrypt.c (prefix
- * "$2a$") by Niels Provos <provos at citi.umich.edu>, and uses some of his
- * ideas. The password hashing algorithm was designed by David Mazieres
- * <dm at lcs.mit.edu>. For more information on the level of compatibility,
- * please refer to the comments in BF_set_key() below and to the included
- * crypt(3) man page.
+ * This implementation is fully compatible with OpenBSD's bcrypt.c for prefix
+ * "$2b$", originally by Niels Provos <provos at citi.umich.edu>, and it uses
+ * some of his ideas. The password hashing algorithm was designed by David
+ * Mazieres <dm at lcs.mit.edu>. For information on the level of
+ * compatibility for bcrypt hash prefixes other than "$2b$", please refer to
+ * the comments in BF_set_key() below and to the included crypt(3) man page.
*
* There's a paper on the algorithm that explains its design decisions:
*
@@ -533,6 +533,7 @@ static void BF_set_key(const char *key, BF_key expanded, BF_key initial,
* Valid combinations of settings are:
*
* Prefix "$2a$": bug = 0, safety = 0x10000
+ * Prefix "$2b$": bug = 0, safety = 0
* Prefix "$2x$": bug = 1, safety = 0
* Prefix "$2y$": bug = 0, safety = 0
*/
@@ -596,12 +597,14 @@ static void BF_set_key(const char *key, BF_key expanded, BF_key initial,
initial[0] ^= sign;
}
+static const unsigned char flags_by_subtype[26] = {
+ 2, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 4, 0
+};
+
static char *BF_crypt(const char *key, const char *setting,
char *output, BF_word min)
{
- static const unsigned char flags_by_subtype[26] =
- {2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 4, 0};
struct {
BF_ctx ctx;
BF_key expanded_key;
@@ -746,9 +749,11 @@ char *__crypt_blowfish(const char *key, const char *setting, char *output)
{
const char *test_key = "8b \xd0\xc1\xd2\xcf\xcc\xd8";
const char *test_setting = "$2a$00$abcdefghijklmnopqrstuu";
- static const char test_hash[2][34] =
- {"VUrPmXD6q/nVSSp7pNDhCR9071IfIRe\0\x55", /* $2x$ */
- "i1D709vfamulimlGcq0qq3UvuUasvEa\0\x55"}; /* $2a$, $2y$ */
+ static const char test_hashes[2][34] = {
+ "i1D709vfamulimlGcq0qq3UvuUasvEa\0\x55", /* 'a', 'b', 'y' */
+ "VUrPmXD6q/nVSSp7pNDhCR9071IfIRe\0\x55", /* 'x' */
+ };
+ const char *test_hash = test_hashes[0];
char *retval;
const char *p;
int ok;
@@ -768,8 +773,11 @@ char *__crypt_blowfish(const char *key, const char *setting, char *output)
* detected by the self-test.
*/
memcpy(buf.s, test_setting, sizeof(buf.s));
- if (retval)
+ if (retval) {
+ unsigned int flags = flags_by_subtype[setting[2] - 'a'];
+ test_hash = test_hashes[flags & 1];
buf.s[2] = setting[2];
+ }
memset(buf.o, 0x55, sizeof(buf.o));
buf.o[sizeof(buf.o) - 1] = 0;
p = BF_crypt(test_key, buf.s, buf.o, 1);
@@ -777,7 +785,7 @@ char *__crypt_blowfish(const char *key, const char *setting, char *output)
ok = (p == buf.o &&
!memcmp(p, buf.s, 7 + 22) &&
!memcmp(p + (7 + 22),
- test_hash[buf.s[2] & 1],
+ test_hash,
31 + 1 + 1 + 1));
{
--
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