Consolidate base64 encode/decode routines.

[exim.git] / src / src / mime.c

diff --git a/src/src/mime.c b/src/src/mime.c
index cc9ffb7c6f3928aa841ae84a434dbe0af9782a44..373774b352502f739a237db7b035a718b25f6c5f 100644 (file)
--- a/src/src/mime.c
+++ b/src/src/mime.c
@@ -19,13 +19,19 @@ uschar *mime_current_boundary = NULL;
 
 /* Small wrapper to set the two expandables which
    give info on detected "problems" in MIME
-   encodings. Those are defined in mime.h. */
+   encodings. Indexes are defined in mime.h. */
 
-static void
-mime_set_anomaly(int level, const char *text)
+void
+mime_set_anomaly(int idx)
 {
-  mime_anomaly_level = level;
-  mime_anomaly_text = CUS text;
+struct anom {
+  int level;
+  const uschar * text;
+} anom[] = { {1, CUS"Broken Quoted-Printable encoding detected"},
+            {2, CUS"Broken BASE64 encoding detected"} };
+
+mime_anomaly_level = anom[idx].level;
+mime_anomaly_text =  anom[idx].text;
 }
 
 
@@ -99,84 +105,6 @@ mime_decode_asis(FILE* in, FILE* out, uschar* boundary)
 }
 
 
-/* decode base64 MIME part */
-static ssize_t
-mime_decode_base64(FILE* in, FILE* out, uschar* boundary)
-{
-  uschar ibuf[MIME_MAX_LINE_LENGTH], obuf[MIME_MAX_LINE_LENGTH];
-  uschar *ipos, *opos;
-  ssize_t len, size = 0;
-  int bytestate = 0;
-
-  opos = obuf;
-
-  while (Ufgets(ibuf, MIME_MAX_LINE_LENGTH, in) != NULL)
-    {
-    if (boundary != NULL
-       && Ustrncmp(ibuf, "--", 2) == 0
-       && Ustrncmp((ibuf+2), boundary, Ustrlen(boundary)) == 0
-       )
-      break;
-
-    for (ipos = ibuf ; *ipos != '\r' && *ipos != '\n' && *ipos != 0; ++ipos)
-      {
-      if (*ipos == '=')                        /* skip padding */
-        {
-        ++bytestate;
-        continue;
-       }
-      if (mime_b64[*ipos] == 128)      /* skip bad characters */
-        {
-        mime_set_anomaly(MIME_ANOMALY_BROKEN_BASE64);
-        continue;
-       }
-
-      /* simple state-machine */
-      switch((bytestate++) & 3)
-        {
-        case 0:
-          *opos = mime_b64[*ipos] << 2;
-           break;
-        case 1:
-          *opos |= mime_b64[*ipos] >> 4;
-          ++opos;
-          *opos = mime_b64[*ipos] << 4;
-          break;
-        case 2:
-          *opos |= mime_b64[*ipos] >> 2;
-          ++opos;
-          *opos = mime_b64[*ipos] << 6;
-          break;
-        case 3:
-          *opos |= mime_b64[*ipos];
-          ++opos;
-          break;
-       } /* switch */
-      } /* for */
-
-    /* something to write? */
-    len = opos - obuf;
-    if (len > 0)
-      {
-      if (fwrite(obuf, 1, len, out) != len) return -1; /* error */
-      size += len;
-      /* copy incomplete last byte to start of obuf, where we continue */
-      if ((bytestate & 3) != 0)
-        *obuf = *opos;
-      opos = obuf;
-      }
-    } /* while */
-
-  /* write out last byte if it was incomplete */
-  if (bytestate & 3)
-    {
-    if (fwrite(obuf, 1, 1, out) != 1) return -1;
-    ++size;
-    }
-
-  return size;
-}
-
 
 /* decode quoted-printable MIME part */
 static ssize_t