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uClibc does not contain l64a/a64l conversion
  Michael Tross <michael (at) tross . org>

--- shadow-4.0.11.1/libmisc/salt.c.orig	2005-06-14 22:27:35.000000000 +0200
+++ shadow-4.0.11.1/libmisc/salt.c	2005-07-27 12:18:22.000000000 +0200
@@ -14,6 +14,38 @@
 #include "prototypes.h"
 #include "defines.h"
 #include "getdef.h"
+
+/*
+ * l64a - convert between long and base-64
+ */
+char *l64a(long value)
+{
+	long int n = (long int) value & 0xffffffff;  /* convert only 32 bits */
+	int i, j;
+	static char b64[7];
+
+	/* return empty string in case of 0 */
+	if (n == 0ul)
+		return (char *) "";
+
+	for (i=0; n>0; i++) {
+		j = n & 0x3f;
+		if (j == 0)
+			b64[i] = '.';
+		else if (j == 1)
+			b64[i] = '/';
+		else if (j <= 11)
+			b64[i] = (j - 2) + '0';
+		else if (j <= 37)
+			b64[i] = (j - 12) + 'A';
+		else
+			b64[i] = (j - 38) + 'a';
+		n >>= 6;
+	}
+	b64[i] = '\0';
+	return (char *) b64;
+}
+
 /*
  * Generate 8 base64 ASCII characters of random salt.  If MD5_CRYPT_ENAB
  * in /etc/login.defs is "yes", the salt string will be prefixed by "$1$"