libcrypt: add support for SHA512-CRYPT password hashing

This is based on Ulrich Drepper's implementation in GLIBC, but hacked up to work
in uClibc.  The differences from the GLIBC version are as follows:

- b64_from_24bit() has been converted into a macro
- Usage of GLIBC-isms (such as libc_freeres_ptr) have been removed

It is enabled by the UCLIBC_HAS_SHA512_CRYPT_IMPL configuration symbol.  You must
have UCLIBC_HAS_CRYPT_IMPL enabled as well.

Signed-off-by: William Pitcock <nenolod@dereferenced.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/libcrypt/crypt.c b/libcrypt/crypt.c
index 33f98b65a..b5bf9ee0f 100644
--- a/libcrypt/crypt.c
+++ b/libcrypt/crypt.c
@@ -19,6 +19,9 @@ static const struct {
 	const crypt_impl_f crypt_impl;
 } crypt_impl_tab[] = {
 	{ "$1$",        __md5_crypt },
+#ifdef __UCLIBC_HAS_SHA512_CRYPT_IMPL__
+	{ "$6$",        __sha512_crypt },
+#endif
 	{ NULL,         __des_crypt },
 };