diff -rup curl-7.15.5.orig/CHANGES curl-7.15.5/CHANGES
--- curl-7.15.5.orig/CHANGES	2006-08-07 08:27:59.000000000 +0200
+++ curl-7.15.5/CHANGES	2009-10-30 23:42:35.373803847 +0100
@@ -6,6 +6,16 @@
 
                                   Changelog
 
+Daniel Stenberg (25 Sep 2009)
+- Chris Mumford filed bug report #2861587
+  (http://curl.haxx.se/bug/view.cgi?id=2861587) identifying that libcurl used
+  the OpenSSL function X509_load_crl_file() wrongly and failed if it would
+  load a CRL file with more than one certificate within. This is now fixed.
+  
+Daniel Stenberg (6 Jun 2008)
+- Axel Tillequin and Arnaud Ebalard added support for CURLOPT_CRLFILE, for
+  OpenSSL, NSS and GnuTLS-built libcurls.
+
 Version 7.15.5 (7 August 2006)
 
 Daniel (2 August 2006)
diff -rup curl-7.15.5.orig/docs/libcurl/curl_easy_setopt.3 curl-7.15.5/docs/libcurl/curl_easy_setopt.3
--- curl-7.15.5.orig/docs/libcurl/curl_easy_setopt.3	2009-10-30 23:41:03.845741285 +0100
+++ curl-7.15.5/docs/libcurl/curl_easy_setopt.3	2009-10-30 23:42:35.374803796 +0100
@@ -1260,6 +1260,24 @@ makes sense only when used in combinatio
 is zero, \fICURLOPT_CAPATH\fP need not even indicate an accessible
 path.  The \fICURLOPT_CAPATH\fP function apparently does not work in
 Windows due to some limitation in openssl. (Added in 7.9.8)
+.IP CURLOPT_CRLFILE
+Pass a char * to a zero terminated string naming a file with the concatenation
+of CRL (in PEM format) to use in the certificate validation that occurs during
+the SSL exchange.
+
+When curl is built to use NSS or GnuTLS, there is no way to influence the use
+of CRL passed to help in the verification process. When libcurl is built with
+OpenSSL support, X509_V_FLAG_CRL_CHECK and X509_V_FLAG_CRL_CHECK_ALL are both
+set, requiring CRL check against all the elements of the certificate chain if
+a CRL file is passed.
+
+This option makes sense only when used in combination with the
+\fICURLOPT_SSL_VERIFYPEER\fP option.
+
+A specific error code (CURLE_SSL_CRL_BADFILE) is defined with the option. It
+is returned when the SSL exchange fails because the CRL file cannot be loaded.
+Note that a failure in certificate verification due to a revocation information
+found in the CRL does not trigger this specific error.
 .IP CURLOPT_RANDOM_FILE
 Pass a char * to a zero terminated file name. The file will be used to read
 from to seed the random engine for SSL. The more random the specified file is,
diff -rup curl-7.15.5.orig/docs/libcurl/libcurl-errors.3 curl-7.15.5/docs/libcurl/libcurl-errors.3
--- curl-7.15.5.orig/docs/libcurl/libcurl-errors.3	2006-06-24 23:49:40.000000000 +0200
+++ curl-7.15.5/docs/libcurl/libcurl-errors.3	2009-10-30 23:42:35.374803796 +0100
@@ -208,6 +208,8 @@ No such TFTP user
 Character conversion failed
 .IP "CURLE_CONV_REQD (76)"
 Caller must register conversion callbacks
+.IP "CURLE_SSL_CRL_BADFILE (82)"
+Failed to load CRL file (Added in 7.19.0)
 .SH "CURLMcode"
 This is the generic return code used by functions in the libcurl multi
 interface. Also consider \fIcurl_multi_strerror(3)\fP.
diff -rup curl-7.15.5.orig/include/curl/curl.h curl-7.15.5/include/curl/curl.h
--- curl-7.15.5.orig/include/curl/curl.h	2009-10-30 23:41:03.846741384 +0100
+++ curl-7.15.5/include/curl/curl.h	2009-10-30 23:42:35.375803976 +0100
@@ -339,6 +339,8 @@ typedef enum {
                                     CURLOPT_CONV_FROM_NETWORK_FUNCTION,
                                     CURLOPT_CONV_TO_NETWORK_FUNCTION, and
                                     CURLOPT_CONV_FROM_UTF8_FUNCTION */
+  CURLE_SSL_CRL_BADFILE = 82,    /* 82 - could not load CRL file, missing or
+                                    wrong format (Added in 7.19.0) */
   CURL_LAST /* never use! */
 } CURLcode;
 
@@ -995,6 +997,9 @@ typedef enum {
   /* Pointer to command string to send if USER/PASS fails. */
   CINIT(FTP_ALTERNATIVE_TO_USER, OBJECTPOINT, 147),
 
+  /* CRL file */
+  CINIT(CRLFILE, OBJECTPOINT, 169),
+
   /* set the bitmask for the protocols that are allowed to be used for the
      transfer, which thus helps the app which takes URLs from users or other
      external inputs and want to restrict what protocol(s) to deal
diff -rup curl-7.15.5.orig/lib/ssluse.c curl-7.15.5/lib/ssluse.c
--- curl-7.15.5.orig/lib/ssluse.c	2009-10-30 23:41:03.852866415 +0100
+++ curl-7.15.5/lib/ssluse.c	2009-10-30 23:45:20.895778697 +0100
@@ -1305,6 +1305,32 @@ Curl_ossl_connect_step1(struct connectda
           data->set.ssl.CAfile ? data->set.ssl.CAfile : "none",
           data->set.ssl.CApath ? data->set.ssl.CApath : "none");
   }
+
+  if (data->set.ssl.CRLfile) {
+    /* tell SSL where to find CRL file that is used to check certificate
+     * revocation */
+    X509_LOOKUP *lookup =
+      X509_STORE_add_lookup(connssl->ctx->cert_store,X509_LOOKUP_file());
+    if ( !lookup ||
+         (!X509_load_crl_file(lookup,data->set.ssl.CRLfile,
+			     X509_FILETYPE_PEM)) ) {
+      failf(data,"error loading CRL file :\n"
+            "  CRLfile: %s\n",
+            data->set.ssl.CRLfile?
+            data->set.ssl.CRLfile: "none");
+      return CURLE_SSL_CRL_BADFILE;
+    }
+    else {
+      /* Everything is fine. */
+      infof(data, "successfully load CRL file:\n");
+      X509_STORE_set_flags(connssl->ctx->cert_store,
+			   X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
+    }
+    infof(data,
+          "  CRLfile: %s\n", data->set.ssl.CRLfile ?
+	  data->set.ssl.CRLfile: "none");
+  }
+
   /* SSL always tries to verify the peer, this only says whether it should
    * fail to connect if the verification fails, or if it should continue
    * anyway. In the latter case the result of the verification is checked with
diff -rup curl-7.15.5.orig/lib/strerror.c curl-7.15.5/lib/strerror.c
--- curl-7.15.5.orig/lib/strerror.c	2006-08-01 11:39:01.000000000 +0200
+++ curl-7.15.5/lib/strerror.c	2009-10-30 23:42:35.376803807 +0100
@@ -241,6 +241,9 @@ curl_easy_strerror(CURLcode error)
   case CURLE_FTP_SSL_FAILED:
     return "Requested FTP SSL level failed";
 
+  case CURLE_SSL_CRL_BADFILE:
+    return "Failed to load CRL file (path? access rights?, format?)";
+
   case CURLE_SEND_FAIL_REWIND:
     return "Send failed since rewinding of the data stream failed";
 
diff -rup curl-7.15.5.orig/lib/url.c curl-7.15.5/lib/url.c
--- curl-7.15.5.orig/lib/url.c	2009-10-30 23:41:03.848741261 +0100
+++ curl-7.15.5/lib/url.c	2009-10-30 23:42:35.378944509 +0100
@@ -1360,6 +1360,13 @@ CURLcode Curl_setopt(struct SessionHandl
     /* This does not work on windows. */
     data->set.ssl.CApath = va_arg(param, char *);
     break;
+  case CURLOPT_CRLFILE:
+    /*
+     * Set CRL file info for SSL connection. Specify file name of the CRL
+     * to check certificates revocation
+     */
+    data->set.ssl.CRLfile = va_arg(param, char *);
+    break;
   case CURLOPT_TELNETOPTIONS:
     /*
      * Set a linked list of telnet options
diff -rup curl-7.15.5.orig/lib/urldata.h curl-7.15.5/lib/urldata.h
--- curl-7.15.5.orig/lib/urldata.h	2009-10-30 23:41:03.849741307 +0100
+++ curl-7.15.5/lib/urldata.h	2009-10-30 23:42:35.379944623 +0100
@@ -171,6 +171,7 @@ struct ssl_config_data {
                             2: CN must match hostname */
   char *CApath;          /* DOES NOT WORK ON WINDOWS */
   char *CAfile;          /* cerficate to verify peer against */
+  char *CRLfile;         /* CRL to check cerficate revocation */
   char *random_file;     /* path to file containing "random" data */
   char *egdsocket;       /* path to file containing the EGD daemon socket */
   char *cipher_list;     /* list of ciphers to use */