1 files changed, 150 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/kdb/base64.c b/crypto/kerberosIV/lib/kdb/base64.c
new file mode 100644
index 0000000..d7e89c4
--- /dev/null
+++ b/crypto/kerberosIV/lib/kdb/base64.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the Kungliga Tekniska
+ *      Högskolan and its contributors.
+ * 
+ * 4. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id: base64.c,v 1.7 1997/04/01 08:18:16 joda Exp $");
+#endif
+
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include "base64.h"
+
+static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+static int POS(char c)
+{
+  if(c == '=') return 64;
+  if(isupper(c))
+    return c - 'A';
+  if(islower(c))
+    return c - 'a' + 26;
+  if(isdigit(c))
+    return c - '0' + 52;
+  if(c == '+')
+    return 62;
+  if(c == '/')
+    return 63;
+  return -1;
+}
+
+char *base64_encode(const void *buf, int size)
+{
+  char *str = (char*)malloc((size+3)*4/3+1);
+  char *p=str;
+  unsigned char *q = (unsigned char*)buf;
+  int i;
+  int c;
+  i=0;
+  while(i<size){
+    c=q[i++];
+    c*=256;
+    if(i<size)
+      c+=q[i];
+    i++;
+    c*=256;
+    if(i<size)
+      c+=q[i];
+    i++;
+    p[0]=base64[(c&0x00fc0000) >> 18];
+    p[1]=base64[(c&0x0003f000) >> 12];
+    p[2]=base64[(c&0x00000fc0) >> 6];
+    p[3]=base64[(c&0x0000003f) >> 0];
+    if(i>size)
+      p[3]='=';
+    if(i>size+1)
+      p[2]='=';
+    p+=4;
+  }
+  *p=0;
+  return str;
+}
+
+/* convert string in s to binary data. s should be a multiple of 4
+ * bytes long. data should be at least len(s) * 3 / 4 bytes long.
+ * returns 
+ */
+int base64_decode(char *s, void *data)
+{
+  char *p;
+  unsigned char *q;
+  int n[4];
+
+  if(strlen(s) % 4)
+    return -1;
+  q=(unsigned char*)data;
+  for(p=s; *p; p+=4){
+    n[0] = POS(p[0]);
+    n[1] = POS(p[1]);
+    n[2] = POS(p[2]);
+    n[3] = POS(p[3]);
+    if((n[0] | n[1] | n[2] | n[3]) < 0)
+      return -1;
+
+    if(n[0] == 64 || n[1] == 64)
+      return -1;
+    if(n[2] == 64 && n[3] < 64)
+      return -1;
+    q[0] = (n[0] << 2) + (n[1] >> 4);
+    if(n[2] < 64){
+      q[1] = ((n[1] & 15) << 4) + (n[2] >> 2);
+    }
+    if(n[3] < 64){
+      q[2] = ((n[2] & 3) << 6) + n[3];
+    }
+    q+=3;
+  }
+  q -= (n[2] == 64) + (n[3] == 64);
+  return q - (unsigned char*)data;
+}
+
+#ifdef TEST
+int main(int argc, char **argv)
+{
+  char str[128];
+  char buf[128];
+  char *p;
+  printf("base64_encode(\"%s\") = \"%s\"\n", argv[1], 
+	 p=base64_encode(argv[1], strlen(argv[1])));
+  printf("base64_decode(\"%s\") = %d", p, base64_decode(p, buf));
+  printf(" (\"%s\")\n", buf);
+  printf("base64_decode(\"%s\") = %d", argv[1], base64_decode(argv[1], buf));
+  printf(" (\"%s\")\n", buf);
+}
+#endif