new getpass proto and function pointer usage

include/curl/curl.h

@@ -99,7 +99,12 @@ typedef size_t (*curl_read_callback)(char *buffer,
                                      size_t nitems,
                                      FILE *instream);
 
-/* All possible error codes from this version of urlget(). Future versions
+typedef int (*curl_passwd_callback)(void *clientp,
+                                    char *prompt,
+                                    char *buffer,
+                                    int buflen);
+
+/* All possible error codes from all sorts of curl functions. Future versions
    may return other values, stay prepared.
 
    Always add new return codes last. Never *EVER* remove any. The return
@@ -166,6 +171,8 @@ typedef enum {
 
   CURLE_HTTP_PORT_FAILED, /* HTTP Interface operation failed */
 
+  CURLE_BAD_PASSWORD_ENTERED, /* when the my_getpass() returns fail */
+
   CURL_LAST
 } CURLcode;
 
@@ -404,6 +411,13 @@ typedef enum {
      this option is used only if SSL_VERIFYPEER is true */
   CINIT(CAINFO, OBJECTPOINT, 65),
 
+  /* Function pointer to replace the internal password prompt */
+  CINIT(PASSWDFUNCTION, FUNCTIONPOINT, 66),
+
+  /* Custom pointer that gets passed as first argument to the password
+     function */
+  CINIT(PASSWDDATA, OBJECTPOINT, 67),
+
   CURLOPT_LASTENTRY /* the last unusued */
 } CURLoption;
 

lib/getpass.c

@@ -68,7 +68,7 @@
 #  define perror(x) fprintf(stderr, "Error in: %s\n", x)
 #endif
 
-void my_getpass(const char *prompt, char *buffer, int buflen)
+int my_getpass(void *client, const char *prompt, char *buffer, int buflen)
 {
   FILE *infp;
   FILE *outfp;
@@ -176,11 +176,12 @@ void my_getpass(const char *prompt, char *buffer, int buflen)
   signal(SIGTSTP, sigtstp);
 #endif
 
+  return 0; /* we always return success */
 }
 #else /* WIN32 */
 #include <stdio.h>
 #include <conio.h>
-void my_getpass(const char *prompt, char *buffer, int buflen)
+int my_getpass(void *client, const char *prompt, char *buffer, int buflen)
 {
   int i;
   printf("%s", prompt);
@@ -195,6 +196,8 @@ void my_getpass(const char *prompt, char *buffer, int buflen)
   /* if user didn't hit ENTER, terminate buffer */
   if (i==buflen)
     buffer[buflen-1]=0;
+
+  return 0; /* we always return success */
 }
 #endif
 

lib/getpass.h

@@ -1 +1,8 @@
-void my_getpass(const char *prompt, char* buffer, int buflen );
+#ifndef __GETPASS_H
+#define __GETPASS_H
+/*
+ * Returning non-zero will abort the continued operation!
+ */
+int my_getpass(void *client, char *prompt, char* buffer, int buflen );
+
+#endif

lib/url.c

@@ -306,6 +306,9 @@ CURLcode curl_open(CURL **curl, char *url)
     /* use fread as default function to read input */
     data->fread = (size_t (*)(char *, size_t, size_t, FILE *))fread;
 
+    /* set the default passwd function */
+    data->fpasswd = my_getpass;
+
     data->infilesize = -1; /* we don't know any size */
 
     data->current_speed = -1; /* init to negative == impossible */
@@ -479,6 +482,12 @@ CURLcode curl_setopt(CURL *curl, CURLoption option, ...)
   case CURLOPT_PROGRESSDATA:
     data->progress_client = va_arg(param, void *);
     break;
+  case CURLOPT_PASSWDFUNCTION:
+    data->fpasswd = va_arg(param, curl_passwd_callback);
+    break;
+  case CURLOPT_PASSWDDATA:
+    data->passwd_client = va_arg(param, void *);
+    break;
   case CURLOPT_PROXYUSERPWD:
     data->proxyuserpwd = va_arg(param, char *);
     data->bits.proxy_user_passwd = data->proxyuserpwd?1:0;
@@ -809,7 +818,10 @@ CURLcode curl_connect(CURL *curl, CURLconnect **in_connect)
 
     /* check for password, if no ask for one */
     if( !data->passwd[0] ) {
-      my_getpass("password:", data->passwd, sizeof(data->passwd));
+      if(!data->fpasswd ||
+         data->fpasswd(data->passwd_client,
+                       "password:", data->passwd, sizeof(data->passwd)))
+        return CURLE_BAD_PASSWORD_ENTERED;
     }
   }
 
@@ -828,9 +840,12 @@ CURLcode curl_connect(CURL *curl, CURLconnect **in_connect)
 
     /* check for password, if no ask for one */
     if( !data->proxypasswd[0] ) {
-      my_getpass("proxy password:",
-                 data->proxypasswd,
-                 sizeof(data->proxypasswd));
+      if(!data->fpasswd ||
+         data->fpasswd( data->passwd_client,
+                        "proxy password:",
+                        data->proxypasswd,
+                        sizeof(data->proxypasswd)))
+        return CURLE_BAD_PASSWORD_ENTERED;
     }
 
   }
@@ -1149,7 +1164,10 @@ CURLcode curl_connect(CURL *curl, CURLconnect **in_connect)
 
       /* check for password, if no ask for one */
       if( !data->passwd[0] ) {
-        my_getpass("password:",data->passwd,sizeof(data->passwd));
+        if(!data->fpasswd ||
+           data->fpasswd(data->passwd_client,
+                         "password:",data->passwd,sizeof(data->passwd)))
+          return CURLE_BAD_PASSWORD_ENTERED;
       }
       else {
         /* we have a password found in the URL, decode it! */

lib/urldata.h

@@ -435,6 +435,10 @@ struct UrlData {
   curl_progress_callback fprogress;
   void *progress_client; /* pointer to pass to the progress callback */
 
+  /* function to call instead of the internal for password */
+  curl_passwd_callback fpasswd;
+  void *passwd_client; /* pointer to pass to the passwd callback */
+
   long timeout; /* in seconds, 0 means no timeout */
   long infilesize; /* size of file to upload, -1 means unknown */