📄 https.c
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/* * Dpi for HTTPS. * * THIS IS A PROTOTYPE to illustrate how it is done. Feel free to polish! * * * W A R N I N G * * Maybe the more important thing yet to be discussed is about whether * unix domain sockets (UDS) are secure for https. I mean, root can always * snoop on sockets (regardless of permissions) so he'd be able to "see" all * the traffic. OTOH, if someone has root access on a machine he can do * anything, and that includes modifying the binaries or peeking-up in * memory space... * * * Copyright 2003 Jorge Arellano Cid <jcid@dillo.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * *//* * TODO: a lot of things, this is just a bare bones example. * * For instance: * - Handle cookies (requires cookies to be made a dpi first) * - Certificate authentication (asking the user in case it can't be verified) * - ... * */#include <unistd.h>#include <sys/types.h>#include <sys/socket.h>#include <sys/un.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <signal.h>#include <sys/wait.h>#include <errno.h>#include <sys/time.h>#include <glib.h>#define BUFLEN 256#define TOUT 300/*---------------------------------------------------------------------------*//* * Task: given a tag and an attribute name, return its value. * (character stuffing is removed here) * Return value: the attribute value, or NULL if not present or malformed. * (copied from bookmarks.c) */char *Get_attr_value(char *tag, int tagsize, char *attrname){ char *p, *q, *ltag, quote, *start, *val = NULL; ltag = g_strndup(tag, tagsize); if ((p = strstr(ltag, attrname)) && (p = strchr(p, '=')) && (p = strpbrk(p, "'\"")) ) { quote = *p; start = ++p; while ((q = strchr(p, quote)) && q[1] == quote) p = q + 2; if (q) { val = g_strndup(start, q - start); for (p = q = val; (*q = *p); ++p, ++q) if ((*p == '"' || *p == '\'') && p[1] == p[0]) ++p; } } g_free(ltag); return val;}/*---------------------------------------------------------------------------*//* * Build a shell command using wget for this URL. */gchar *make_wget_cmd(gchar *url){ return g_strdup_printf("wget -O - '%s' 2>/dev/null", url);}/* * Send the stream with coarse buffering (fastest) * Return value: 1: data sent, 0: nothing sent */gint send_stream_3(FILE *in_stream, gchar *url){ gint header = 0; gchar buf[4096]; size_t n; while ((n = fread (buf, 1, 4096, in_stream)) > 0) { if (n > 0 && !header) { printf("<dpi cmd='start_send_page' url='%s'>", url); // printf("Content-type: text/html\n\n"); printf("\n\n"); header = 1; } fwrite(buf, 1, n, stdout); //fwrite(buf, 1, n, stderr); } return header;}/* * */int main(void){ FILE *F_stdin; gchar *dpip_tag = NULL, *cmd = NULL, *url = NULL, *http_query = NULL; gint rd_len; gchar buf[4096]; /* Read the dpi command from STDIN */ F_stdin = fdopen (STDIN_FILENO, "r"); rd_len = read(STDIN_FILENO, buf, 4096); dpip_tag = g_strndup(buf, rd_len); fclose(F_stdin);// close(STDIN_FILENO); /* Necessary? */// g_printerr("[%s]\n", dpip_tag);g_printerr("{In https.filter.dpi}\n"); cmd = Get_attr_value(dpip_tag, strlen(dpip_tag), "cmd"); url = Get_attr_value(dpip_tag, strlen(dpip_tag), "url"); http_query = Get_attr_value(dpip_tag, strlen(dpip_tag), "query");g_printerr("{ cmd: %s}\n", cmd);g_printerr("{ url: %s}\n", url);g_printerr("{ http_query:\n%s}\n", http_query);g_printerr("{ sending dpip cmd...}\n"); printf("<dpi cmd='start_send_page' url='%s'>", url);g_printerr("{ dpip cmd sent.}\n");g_printerr("{ sending HTML...}\n"); printf("Content-type: text/html\n\n"); printf("<html><body><pre>\n"); printf("<b>Hi!\n\n"); printf(" This is the https dpi that just got a request to send\n"); printf(" the following HTTP query:\n{</b>\n"); printf("<code>%s</code>\n", http_query); printf("<b>}</b>\n\n"); printf(" <b>*** Dillo doesn't support https yet,"); printf(" but we're working on it.</b>\n\n"); printf(" If you're a developer willing to help having https in dillo,\n"); printf(" please contact our mailing list. We have a working prototype\n"); printf(" to work with.\n\n"); printf(" --\n"); printf("</pre></body></html>\n");g_printerr("{ HTML content sent.}\n"); g_free(cmd); g_free(url); g_free(http_query); g_free(dpip_tag);g_printerr("{ exiting https.dpi}\n"); return 0;}⌨️ 快捷键说明
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