From a39d77227fe9d74db74fee259329e4b4a086fcce Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 22 May 2003 22:39:38 +0000
Subject: Better Digest stuff

---
 lib/http.c        |  4 +++-
 lib/http_digest.c | 20 +++++++++++++++++++-
 lib/http_digest.h |  2 ++
 lib/transfer.c    | 21 +++++++++++++--------
 lib/urldata.h     |  1 +
 5 files changed, 38 insertions(+), 10 deletions(-)

diff --git a/lib/http.c b/lib/http.c
index a7ad947e1..44ef29e8f 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -670,7 +670,9 @@ CURLcode Curl_http(struct connectdata *conn)
     if(result)
       return result;
   }
-  else if((conn->bits.user_passwd) && !checkheaders(data, "Authorization:")) {
+  else if(!data->set.httpdigest && /* not if Digest is enabled */
+          conn->bits.user_passwd &&
+          !checkheaders(data, "Authorization:")) {
     char *authorization;
 
     /* To prevent the user+password to get sent to other than the original
diff --git a/lib/http_digest.c b/lib/http_digest.c
index 2aeb3b8e9..7f62c26b4 100644
--- a/lib/http_digest.c
+++ b/lib/http_digest.c
@@ -65,7 +65,8 @@ CURLdigest Curl_input_digest(struct connectdata *conn,
   if(checkprefix("Digest", header)) {
     header += strlen("Digest");
 
-    data->state.digest.algo = CURLDIGESTALGO_MD5; /* default algorithm */
+    /* clear off any former leftovers and init to defaults */
+    Curl_digest_cleanup(data);
 
     while(more) {
       char value[32];
@@ -207,4 +208,21 @@ CURLcode Curl_output_digest(struct connectdata *conn,
   return CURLE_OK;
 }
 
+void Curl_digest_cleanup(struct SessionHandle *data)
+{
+  if(data->state.digest.nonce)
+    free(data->state.digest.nonce);
+  data->state.digest.nonce = NULL;
+
+  if(data->state.digest.cnonce)
+    free(data->state.digest.cnonce);
+  data->state.digest.cnonce = NULL;
+
+  if(data->state.digest.realm)
+    free(data->state.digest.realm);
+  data->state.digest.realm = NULL;
+
+  data->state.digest.algo = CURLDIGESTALGO_MD5; /* default algorithm */
+}
+
 #endif
diff --git a/lib/http_digest.h b/lib/http_digest.h
index 622567361..1e7feac21 100644
--- a/lib/http_digest.h
+++ b/lib/http_digest.h
@@ -43,4 +43,6 @@ CURLdigest Curl_input_digest(struct connectdata *conn, char *header);
 CURLcode Curl_output_digest(struct connectdata *conn,
                             unsigned char *request,
                             unsigned char *uripath);
+void Curl_digest_cleanup(struct SessionHandle *data);
+
 #endif
diff --git a/lib/transfer.c b/lib/transfer.c
index c8c127348..9bc9f1020 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -704,15 +704,20 @@ CURLcode Curl_readwrite(struct connectdata *conn,
             }
             else if(checkprefix("WWW-Authenticate:", k->p) &&
                     (401 == k->httpcode) &&
-                    1 /* TODO: replace with a check for Digest authentication
-                         activated */) {
-              CURLdigest dig = Curl_input_digest(conn, k->p+
-                                                 strlen("WWW-Authenticate:"));
-              if(CURLDIGEST_FINE == dig) {
+                    data->set.httpdigest /* Digest authentication is 
+                                            activated */) {
+              CURLdigest dig = CURLDIGEST_BAD;
+
+              if(data->state.digest.nonce)
+                infof(data, "Authentication problem. Ignoring this.");
+              else
+                dig = Curl_input_digest(conn,
+                                        k->p+strlen("WWW-Authenticate:"));
+
+              if(CURLDIGEST_FINE == dig)
                 /* We act on it. Store our new url, which happens to be
                    the same one we already use! */
                 conn->newurl = strdup(data->change.url); /* clone string */
-              }
             }
             else if ((k->httpcode >= 300 && k->httpcode < 400) &&
                      checkprefix("Location:", k->p)) {
@@ -797,7 +802,7 @@ CURLcode Curl_readwrite(struct connectdata *conn,
               /* HTTP-only checks */
               if (conn->newurl) {
                 /* abort after the headers if "follow Location" is set */
-                infof (data, "Follow to new URL: %s\n", conn->newurl);
+                infof (data, "Send request to this URL: %s\n", conn->newurl);
                 k->keepon &= ~KEEP_READ;
                 FD_ZERO(&k->rkeepfd);
                 *done = TRUE;
@@ -1568,7 +1573,7 @@ CURLcode Curl_follow(struct SessionHandle *data,
   data->change.url = newurl;
   newurl = NULL; /* don't free! */
 
-  infof(data, "Follows Location: to new URL: '%s'\n", data->change.url);
+  infof(data, "Issue another request to this URL: '%s'\n", data->change.url);
 
   /*
    * We get here when the HTTP code is 300-399. We need to perform
diff --git a/lib/urldata.h b/lib/urldata.h
index 31a755355..58f700677 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -671,6 +671,7 @@ struct UserDefined {
   char *set_proxy;   /* proxy to use */
   long use_port;     /* which port to use (when not using default) */
   char *userpwd;     /* <user:password>, if used */
+  bool httpdigest;   /* if HTTP Digest is enabled */
   char *set_range;   /* range, if used. See README for detailed specification
                         on this syntax. */
   long followlocation; /* as in HTTP Location: */
-- 
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