* crypt/Makefile (libcrypt-routines): Add sha256-crypt, sha256,

sha512-crypt, and sha512.
	(tests): Add sha256test, sha256c-test, sha512test, and sha512c-test.
	(distribute): Add sha256.h and sha512.h.
	* crypt/crypt-entry.c (crypt): Recognize the new $5$ and $6$ prefixes
	and call the appropriate code.
	* crypt/sha256-crypt.c: New file.
	* crypt/sha256.c: New file.
	* crypt/sha256.h: New file.
	* crypt/sha256c-test.c: New file.
	* crypt/sha256test.c: New file.
	* crypt/sha512-crypt.c: New file.
	* crypt/sha512.c: New file.
	* crypt/sha512.h: New file.
	* crypt/sha512c-test.c: New file.
	* crypt/sha512test.c: New file.

	* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__thread_start):
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__thread_start):
	Likewise.

crypt/sha256c-test.c

@@ -0,0 +1,61 @@
+#include <crypt.h>
+#include <stdio.h>
+#include <string.h>
+
+static const struct
+{
+  const char *salt;
+  const char *input;
+  const char *expected;
+} tests[] =
+{
+  { "$5$saltstring", "Hello world!",
+    "$5$saltstring$5B8vYYiY.CVt1RlTTf8KbXBH3hsxY/GNooZaBBGWEc5" },
+  { "$5$rounds=10000$saltstringsaltstring", "Hello world!",
+    "$5$rounds=10000$saltstringsaltst$3xv.VbSHBb41AL9AvLeujZkZRBAwqFMz2."
+    "opqey6IcA" },
+  { "$5$rounds=5000$toolongsaltstring", "This is just a test",
+    "$5$rounds=5000$toolongsaltstrin$Un/5jzAHMgOGZ5.mWJpuVolil07guHPvOW8"
+    "mGRcvxa5" },
+  { "$5$rounds=1400$anotherlongsaltstring",
+    "a very much longer text to encrypt.  This one even stretches over more"
+    "than one line.",
+    "$5$rounds=1400$anotherlongsalts$Rx.j8H.h8HjEDGomFU8bDkXm3XIUnzyxf12"
+    "oP84Bnq1" },
+  { "$5$rounds=77777$short",
+    "we have a short salt string but not a short password",
+    "$5$rounds=77777$short$JiO1O3ZpDAxGJeaDIuqCoEFysAe1mZNJRs3pw0KQRd/" },
+  { "$5$rounds=123456$asaltof16chars..", "a short string",
+    "$5$rounds=123456$asaltof16chars..$gP3VQ/6X7UUEW3HkBn2w1/Ptq2jxPyzV/"
+    "cZKmF/wJvD" },
+  { "$5$rounds=10$roundstoolow", "the minimum number is still observed",
+    "$5$rounds=1000$roundstoolow$yfvwcWrQ8l/K0DAWyuPMDNHpIVlTQebY9l/gL97"
+    "2bIC" },
+};
+#define ntests (sizeof (tests) / sizeof (tests[0]))
+
+
+
+static int
+do_test (void)
+{
+  int result = 0;
+  int i;
+
+  for (i = 0; i < ntests; ++i)
+    {
+      char *cp = crypt (tests[i].input, tests[i].salt);
+
+      if (strcmp (cp, tests[i].expected) != 0)
+	{
+	  printf ("test %d: expected \"%s\", got \"%s\"\n",
+		  i, tests[i].expected, cp);
+	  result = 1;
+	}
+    }
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"