X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/d7978c0f8af20ff4c3f770589b1bb81568aecff3..1d28cc061677bd07d9bed48dd84bd5c590247043:/src/src/auths/auth-spa.c

diff --git a/src/src/auths/auth-spa.c b/src/src/auths/auth-spa.c
index b396e3892..bcf88c84d 100644
--- a/src/src/auths/auth-spa.c
+++ b/src/src/auths/auth-spa.c
@@ -8,6 +8,9 @@
 
  * All the original code used here was torn by Marc Prud'hommeaux out of the
  * Samba project (by Andrew Tridgell, Jeremy Allison, and others).
+ *
+ * Copyright (c) The Exim Maintainers 2021
+ * SPDX-License-Identifier: GPL-2.0-or-later
 
  * Tom Kistner provided additional code, adding spa_build_auth_challenge() to
  * support server authentication mode.
@@ -374,27 +377,27 @@ void
 spa_bits_to_base64 (uschar *out, const uschar *in, int inlen)
 /* raw bytes in quasi-big-endian order to base 64 string (NUL-terminated) */
 {
-  for (; inlen >= 3; inlen -= 3)
-    {
-      *out++ = base64digits[in[0] >> 2];
-      *out++ = base64digits[((in[0] << 4) & 0x30) | (in[1] >> 4)];
-      *out++ = base64digits[((in[1] << 2) & 0x3c) | (in[2] >> 6)];
-      *out++ = base64digits[in[2] & 0x3f];
-      in += 3;
-    }
-  if (inlen > 0)
-    {
-      uschar fragment;
-
-      *out++ = base64digits[in[0] >> 2];
-      fragment = (in[0] << 4) & 0x30;
-      if (inlen > 1)
-       fragment |= in[1] >> 4;
-      *out++ = base64digits[fragment];
-      *out++ = (inlen < 2) ? '=' : base64digits[(in[1] << 2) & 0x3c];
-      *out++ = '=';
-    }
-  *out = '\0';
+for (; inlen >= 3; inlen -= 3)
+  {
+  *out++ = base64digits[in[0] >> 2];
+  *out++ = base64digits[((in[0] << 4) & 0x30) | (in[1] >> 4)];
+  *out++ = base64digits[((in[1] << 2) & 0x3c) | (in[2] >> 6)];
+  *out++ = base64digits[in[2] & 0x3f];
+  in += 3;
+  }
+if (inlen > 0)
+  {
+  uschar fragment;
+
+  *out++ = base64digits[in[0] >> 2];
+  fragment = (in[0] << 4) & 0x30;
+  if (inlen > 1)
+     fragment |= in[1] >> 4;
+  *out++ = base64digits[fragment];
+  *out++ = (inlen < 2) ? '=' : base64digits[(in[1] << 2) & 0x3c];
+  *out++ = '=';
+  }
+*out = '\0';
 }
 
 
@@ -404,52 +407,52 @@ int
 spa_base64_to_bits (char *out, int outlength, const char *in)
 /* base 64 to raw bytes in quasi-big-endian order, returning count of bytes */
 {
-  int len = 0;
-  register uschar digit1, digit2, digit3, digit4;
+int len = 0;
+uschar digit1, digit2, digit3, digit4;
 
-  if (in[0] == '+' && in[1] == ' ')
-    in += 2;
-  if (*in == '\r')
-    return (0);
+if (in[0] == '+' && in[1] == ' ')
+  in += 2;
+if (*in == '\r')
+  return (0);
 
-  do
+do
+  {
+  if (len >= outlength)                   /* Added by PH */
+    return -1;                          /* Added by PH */
+  digit1 = in[0];
+  if (DECODE64 (digit1) == BAD)
+    return -1;
+  digit2 = in[1];
+  if (DECODE64 (digit2) == BAD)
+    return -1;
+  digit3 = in[2];
+  if (digit3 != '=' && DECODE64 (digit3) == BAD)
+    return -1;
+  digit4 = in[3];
+  if (digit4 != '=' && DECODE64 (digit4) == BAD)
+    return -1;
+  in += 4;
+  *out++ = (DECODE64 (digit1) << 2) | (DECODE64 (digit2) >> 4);
+  ++len;
+  if (digit3 != '=')
     {
+    if (len >= outlength)                   /* Added by PH */
+      return -1;                          /* Added by PH */
+    *out++ =
+      ((DECODE64 (digit2) << 4) & 0xf0) | (DECODE64 (digit3) >> 2);
+    ++len;
+    if (digit4 != '=')
+      {
       if (len >= outlength)                   /* Added by PH */
-        return (-1);                          /* Added by PH */
-      digit1 = in[0];
-      if (DECODE64 (digit1) == BAD)
-       return (-1);
-      digit2 = in[1];
-      if (DECODE64 (digit2) == BAD)
-       return (-1);
-      digit3 = in[2];
-      if (digit3 != '=' && DECODE64 (digit3) == BAD)
-       return (-1);
-      digit4 = in[3];
-      if (digit4 != '=' && DECODE64 (digit4) == BAD)
-       return (-1);
-      in += 4;
-      *out++ = (DECODE64 (digit1) << 2) | (DECODE64 (digit2) >> 4);
+	return -1;                          /* Added by PH */
+      *out++ = ((DECODE64 (digit3) << 6) & 0xc0) | DECODE64 (digit4);
       ++len;
-      if (digit3 != '=')
-       {
-         if (len >= outlength)                   /* Added by PH */
-           return (-1);                          /* Added by PH */
-         *out++ =
-           ((DECODE64 (digit2) << 4) & 0xf0) | (DECODE64 (digit3) >> 2);
-         ++len;
-         if (digit4 != '=')
-           {
-             if (len >= outlength)                   /* Added by PH */
-               return (-1);                          /* Added by PH */
-             *out++ = ((DECODE64 (digit3) << 6) & 0xc0) | DECODE64 (digit4);
-             ++len;
-           }
-       }
+      }
     }
-  while (*in && *in != '\r' && digit4 != '=');
+  }
+while (*in && *in != '\r' && digit4 != '=');
 
-  return (len);
+return len;
 }
 
 
@@ -1209,7 +1212,7 @@ char versionString[] = "libntlm version 0.21";
 
 #define spa_bytes_add(ptr, header, buf, count) \
 { \
-if (buf != NULL  &&  count != 0) /* we hate -Wint-in-bool-contex */ \
+if (buf && (count) != 0) /* we hate -Wint-in-bool-contex */ \
   { \
   SSVAL(&ptr->header.len,0,count); \
   SSVAL(&ptr->header.maxlen,0,count); \
@@ -1395,8 +1398,6 @@ int i;
 int p = (int)getpid();
 int random_seed = (int)time(NULL) ^ ((p << 16) | p);
 
-request = request;  /* Added by PH to stop compilers whinging */
-
 /* Ensure challenge data is cleared, in case it isn't all used. This
 patch added by PH on suggestion of Russell King */