Revert changes relative to lib/*.[ch] recent renaming

This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:

  f871de0... build: make use of 76 lib/*.h renamed files
  ffd8e12... build: rename 76 lib/*.h files

This also reverts removal of redundant include guard (redundant thanks
to changes in above commits) done 2-12-2013, reverting 1 commit:

  c087374... curl_setup.h: remove redundant include guard

This also reverts renaming and usage of lib/*.c source files done
3-12-2013, reverting 3 commits:

  13606bb... build: make use of 93 lib/*.c renamed files
  5b6e792... build: rename 93 lib/*.c files
  7d83dff... build: commit 13606bbfde follow-up 1

Start of related discussion thread:

  http://curl.haxx.se/mail/lib-2013-01/0012.html

Asking for confirmation on pushing this revertion commit:

  http://curl.haxx.se/mail/lib-2013-01/0048.html

Confirmation summary:

  http://curl.haxx.se/mail/lib-2013-01/0079.html

NOTICE: The list of 2 files that have been modified by other
intermixed commits, while renamed, and also by at least one
of the 6 commits this one reverts follows below. These 2 files
will exhibit a hole in history unless git's '--follow' option
is used when viewing logs.

  lib/curl_imap.h
  lib/curl_smtp.h

1 files changed, 373 insertions, 0 deletions

diff --git a/lib/http_negotiate.c b/lib/http_negotiate.c
new file mode 100644
index 000000000..92c363d7c
--- /dev/null
+++ b/lib/http_negotiate.c
@@ -0,0 +1,373 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "setup.h"
+
+#ifdef HAVE_GSSAPI
+#ifdef HAVE_OLD_GSSMIT
+#define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
+#define NCOMPAT 1
+#endif
+
+#ifndef CURL_DISABLE_HTTP
+
+#include "urldata.h"
+#include "sendf.h"
+#include "curl_gssapi.h"
+#include "rawstr.h"
+#include "curl_base64.h"
+#include "http_negotiate.h"
+#include "curl_memory.h"
+#include "url.h"
+
+#ifdef HAVE_SPNEGO
+#  include <spnegohelp.h>
+#  ifdef USE_SSLEAY
+#    ifdef USE_OPENSSL
+#      include <openssl/objects.h>
+#    else
+#      include <objects.h>
+#    endif
+#  else
+#    error "Can't compile SPNEGO support without OpenSSL."
+#  endif
+#endif
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+/* The last #include file should be: */
+#include "memdebug.h"
+
+static int
+get_gss_name(struct connectdata *conn, bool proxy, gss_name_t *server)
+{
+  struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
+    &conn->data->state.negotiate;
+  OM_uint32 major_status, minor_status;
+  gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
+  char name[2048];
+  const char* service;
+
+  /* GSSAPI implementation by Globus (known as GSI) requires the name to be
+     of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead
+     of at-sign). Also GSI servers are often identified as 'host' not 'khttp'.
+     Change following lines if you want to use GSI */
+
+  /* IIS uses the <service>@<fqdn> form but uses 'http' as the service name */
+
+  if(neg_ctx->gss)
+    service = "KHTTP";
+  else
+    service = "HTTP";
+
+  token.length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name :
+                                              conn->host.name) + 1;
+  if(token.length + 1 > sizeof(name))
+    return EMSGSIZE;
+
+  snprintf(name, sizeof(name), "%s@%s", service, proxy ? conn->proxy.name :
+           conn->host.name);
+
+  token.value = (void *) name;
+  major_status = gss_import_name(&minor_status,
+                                 &token,
+                                 GSS_C_NT_HOSTBASED_SERVICE,
+                                 server);
+
+  return GSS_ERROR(major_status) ? -1 : 0;
+}
+
+static void
+log_gss_error(struct connectdata *conn, OM_uint32 error_status,
+              const char *prefix)
+{
+  OM_uint32 maj_stat, min_stat;
+  OM_uint32 msg_ctx = 0;
+  gss_buffer_desc status_string;
+  char buf[1024];
+  size_t len;
+
+  snprintf(buf, sizeof(buf), "%s", prefix);
+  len = strlen(buf);
+  do {
+    maj_stat = gss_display_status(&min_stat,
+                                  error_status,
+                                  GSS_C_MECH_CODE,
+                                  GSS_C_NO_OID,
+                                  &msg_ctx,
+                                  &status_string);
+      if(sizeof(buf) > len + status_string.length + 1) {
+        snprintf(buf + len, sizeof(buf) - len,
+                 ": %s", (char*) status_string.value);
+      len += status_string.length;
+    }
+    gss_release_buffer(&min_stat, &status_string);
+  } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
+
+  infof(conn->data, "%s\n", buf);
+}
+
+/* returning zero (0) means success, everything else is treated as "failure"
+   with no care exactly what the failure was */
+int Curl_input_negotiate(struct connectdata *conn, bool proxy,
+                         const char *header)
+{
+  struct SessionHandle *data = conn->data;
+  struct negotiatedata *neg_ctx = proxy?&data->state.proxyneg:
+    &data->state.negotiate;
+  OM_uint32 major_status, minor_status, minor_status2;
+  gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+  gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
+  int ret;
+  size_t len;
+  size_t rawlen = 0;
+  bool gss;
+  const char* protocol;
+  CURLcode error;
+
+  while(*header && ISSPACE(*header))
+    header++;
+  if(checkprefix("GSS-Negotiate", header)) {
+    protocol = "GSS-Negotiate";
+    gss = TRUE;
+  }
+  else if(checkprefix("Negotiate", header)) {
+    protocol = "Negotiate";
+    gss = FALSE;
+  }
+  else
+    return -1;
+
+  if(neg_ctx->context) {
+    if(neg_ctx->gss != gss) {
+      return -1;
+    }
+  }
+  else {
+    neg_ctx->protocol = protocol;
+    neg_ctx->gss = gss;
+  }
+
+  if(neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
+    /* We finished successfully our part of authentication, but server
+     * rejected it (since we're again here). Exit with an error since we
+     * can't invent anything better */
+    Curl_cleanup_negotiate(data);
+    return -1;
+  }
+
+  if(neg_ctx->server_name == NULL &&
+      (ret = get_gss_name(conn, proxy, &neg_ctx->server_name)))
+    return ret;
+
+  header += strlen(neg_ctx->protocol);
+  while(*header && ISSPACE(*header))
+    header++;
+
+  len = strlen(header);
+  if(len > 0) {
+    error = Curl_base64_decode(header,
+                               (unsigned char **)&input_token.value, &rawlen);
+    if(error || rawlen == 0)
+      return -1;
+    input_token.length = rawlen;
+
+#ifdef HAVE_SPNEGO /* Handle SPNEGO */
+    if(checkprefix("Negotiate", header)) {
+      ASN1_OBJECT *   object            = NULL;
+      unsigned char * spnegoToken       = NULL;
+      size_t          spnegoTokenLength = 0;
+      unsigned char * mechToken         = NULL;
+      size_t          mechTokenLength   = 0;
+
+      if(input_token.value == NULL)
+        return CURLE_OUT_OF_MEMORY;
+
+      spnegoToken = malloc(input_token.length);
+      if(spnegoToken == NULL)
+        return CURLE_OUT_OF_MEMORY;
+
+      spnegoTokenLength = input_token.length;
+
+      object = OBJ_txt2obj ("1.2.840.113554.1.2.2", 1);
+      if(!parseSpnegoTargetToken(spnegoToken,
+                                 spnegoTokenLength,
+                                 NULL,
+                                 NULL,
+                                 &mechToken,
+                                 &mechTokenLength,
+                                 NULL,
+                                 NULL)) {
+        free(spnegoToken);
+        spnegoToken = NULL;
+        infof(data, "Parse SPNEGO Target Token failed\n");
+      }
+      else {
+        free(input_token.value);
+        input_token.value = malloc(mechTokenLength);
+        if(input_token.value == NULL)
+          return CURLE_OUT_OF_MEMORY;
+
+        memcpy(input_token.value, mechToken,mechTokenLength);
+        input_token.length = mechTokenLength;
+        free(mechToken);
+        mechToken = NULL;
+        infof(data, "Parse SPNEGO Target Token succeeded\n");
+      }
+    }
+#endif
+  }
+
+  major_status = Curl_gss_init_sec_context(data,
+                                           &minor_status,
+                                           &neg_ctx->context,
+                                           neg_ctx->server_name,
+                                           GSS_C_NO_CHANNEL_BINDINGS,
+                                           &input_token,
+                                           &output_token,
+                                           NULL);
+  if(input_token.length > 0)
+    gss_release_buffer(&minor_status2, &input_token);
+  neg_ctx->status = major_status;
+  if(GSS_ERROR(major_status)) {
+    /* Curl_cleanup_negotiate(data) ??? */
+    log_gss_error(conn, minor_status,
+                  "gss_init_sec_context() failed: ");
+    return -1;
+  }
+
+  if(output_token.length == 0) {
+    return -1;
+  }
+
+  neg_ctx->output_token = output_token;
+  /* conn->bits.close = FALSE; */
+
+  return 0;
+}
+
+
+CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
+{
+  struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
+    &conn->data->state.negotiate;
+  char *encoded = NULL;
+  size_t len = 0;
+  char *userp;
+  CURLcode error;
+
+#ifdef HAVE_SPNEGO /* Handle SPNEGO */
+  if(checkprefix("Negotiate", neg_ctx->protocol)) {
+    ASN1_OBJECT *   object            = NULL;
+    unsigned char * spnegoToken       = NULL;
+    size_t          spnegoTokenLength = 0;
+    unsigned char * responseToken       = NULL;
+    size_t          responseTokenLength = 0;
+
+    responseToken = malloc(neg_ctx->output_token.length);
+    if(responseToken == NULL)
+      return CURLE_OUT_OF_MEMORY;
+    memcpy(responseToken, neg_ctx->output_token.value,
+           neg_ctx->output_token.length);
+    responseTokenLength = neg_ctx->output_token.length;
+
+    object=OBJ_txt2obj ("1.2.840.113554.1.2.2", 1);
+    if(!makeSpnegoInitialToken (object,
+                                 responseToken,
+                                 responseTokenLength,
+                                 &spnegoToken,
+                                 &spnegoTokenLength)) {
+      free(responseToken);
+      responseToken = NULL;
+      infof(conn->data, "Make SPNEGO Initial Token failed\n");
+    }
+    else {
+      free(responseToken);
+      responseToken = NULL;
+      free(neg_ctx->output_token.value);
+      neg_ctx->output_token.value = malloc(spnegoTokenLength);
+      if(neg_ctx->output_token.value == NULL) {
+        free(spnegoToken);
+        spnegoToken = NULL;
+        return CURLE_OUT_OF_MEMORY;
+      }
+      memcpy(neg_ctx->output_token.value, spnegoToken,spnegoTokenLength);
+      neg_ctx->output_token.length = spnegoTokenLength;
+      free(spnegoToken);
+      spnegoToken = NULL;
+      infof(conn->data, "Make SPNEGO Initial Token succeeded\n");
+    }
+  }
+#endif
+  error = Curl_base64_encode(conn->data,
+                             neg_ctx->output_token.value,
+                             neg_ctx->output_token.length,
+                             &encoded, &len);
+  if(error) {
+    Curl_safefree(neg_ctx->output_token.value);
+    neg_ctx->output_token.value = NULL;
+    return error;
+  }
+
+  if(len == 0) {
+    Curl_safefree(neg_ctx->output_token.value);
+    neg_ctx->output_token.value = NULL;
+    return CURLE_REMOTE_ACCESS_DENIED;
+  }
+
+  userp = aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "",
+                  neg_ctx->protocol, encoded);
+
+  if(proxy)
+    conn->allocptr.proxyuserpwd = userp;
+  else
+    conn->allocptr.userpwd = userp;
+  free(encoded);
+  Curl_cleanup_negotiate (conn->data);
+  return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
+}
+
+static void cleanup(struct negotiatedata *neg_ctx)
+{
+  OM_uint32 minor_status;
+  if(neg_ctx->context != GSS_C_NO_CONTEXT)
+    gss_delete_sec_context(&minor_status, &neg_ctx->context, GSS_C_NO_BUFFER);
+
+  if(neg_ctx->output_token.length != 0)
+    gss_release_buffer(&minor_status, &neg_ctx->output_token);
+
+  if(neg_ctx->server_name != GSS_C_NO_NAME)
+    gss_release_name(&minor_status, &neg_ctx->server_name);
+
+  memset(neg_ctx, 0, sizeof(*neg_ctx));
+}
+
+void Curl_cleanup_negotiate(struct SessionHandle *data)
+{
+  cleanup(&data->state.negotiate);
+  cleanup(&data->state.proxyneg);
+}
+
+
+#endif
+#endif