Adding upstream version 1.9.15p5.upstream/1.9.15p5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 239 insertions, 0 deletions

diff --git a/src/conversation.c b/src/conversation.c
new file mode 100644
index 0000000..ea2469f
--- /dev/null
+++ b/src/conversation.c
@@ -0,0 +1,239 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 1999-2005, 2007-2012 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <sudo.h>
+#include <sudo_plugin.h>
+#include <sudo_plugin_int.h>
+
+/*
+ * Sudo conversation function.
+ */
+int
+sudo_conversation(int num_msgs, const struct sudo_conv_message msgs[],
+    struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
+{
+    const int conv_debug_instance = sudo_debug_get_active_instance();
+    char *pass;
+    int n;
+
+    sudo_debug_set_active_instance(sudo_debug_instance);
+
+    for (n = 0; n < num_msgs; n++) {
+	const struct sudo_conv_message *msg = &msgs[n];
+	unsigned int flags = tgetpass_flags;
+	FILE *fp = stdout;
+
+	if (replies != NULL)
+	    replies[n].reply = NULL;
+
+	switch (msg->msg_type & 0xff) {
+	    case SUDO_CONV_PROMPT_ECHO_ON:
+		SET(flags, TGP_ECHO);
+		goto read_pass;
+	    case SUDO_CONV_PROMPT_MASK:
+		SET(flags, TGP_MASK);
+		FALLTHROUGH;
+	    case SUDO_CONV_PROMPT_ECHO_OFF:
+		if (ISSET(msg->msg_type, SUDO_CONV_PROMPT_ECHO_OK))
+		    SET(flags, TGP_NOECHO_TRY);
+	    read_pass:
+		/* Read the password unless interrupted. */
+		if (replies == NULL)
+		    goto err;
+		pass = tgetpass(msg->msg, msg->timeout, flags, callback);
+		if (pass == NULL)
+		    goto err;
+		replies[n].reply = strdup(pass);
+		if (replies[n].reply == NULL) {
+		    sudo_fatalx_nodebug(U_("%s: %s"), "sudo_conversation",
+			U_("unable to allocate memory"));
+		}
+		explicit_bzero(pass, strlen(pass));
+		break;
+	    case SUDO_CONV_ERROR_MSG:
+		fp = stderr;
+		FALLTHROUGH;
+	    case SUDO_CONV_INFO_MSG:
+		if (msg->msg != NULL) {
+		    size_t len = strlen(msg->msg);
+		    const char *crnl = NULL;
+		    bool written = false;
+		    int ttyfd = -1;
+		    bool raw_tty = false;
+
+		    if (ISSET(msg->msg_type, SUDO_CONV_PREFER_TTY) &&
+			    !ISSET(flags, TGP_STDIN)) {
+			ttyfd = open(_PATH_TTY, O_WRONLY);
+			if (ttyfd != -1)
+			    raw_tty = sudo_term_is_raw(ttyfd);
+		    } else {
+			raw_tty = sudo_term_is_raw(fileno(fp));
+		    }
+		    if (len != 0 && raw_tty) {
+			/* Convert nl -> cr nl in case tty is in raw mode. */
+			if (msg->msg[len - 1] == '\n') {
+			    if (len == 1 || msg->msg[len - 2] != '\r') {
+				len--;
+				crnl = "\r\n";
+			    }
+			}
+		    }
+		    if (ttyfd != -1) {
+			/* Try writing to tty but fall back to fp on error. */
+			if ((len == 0 || write(ttyfd, msg->msg, len) != -1) &&
+				(crnl == NULL || write(ttyfd, crnl, 2) != -1)) {
+			    written = true;
+			}
+			close(ttyfd);
+		    }
+		    if (!written) {
+			if (len != 0 && fwrite(msg->msg, 1, len, fp) == 0)
+			    goto err;
+			if (crnl != NULL && fwrite(crnl, 1, 2, fp) == 0)
+			    goto err;
+		    }
+		}
+		break;
+	    default:
+		goto err;
+	}
+    }
+
+    sudo_debug_set_active_instance(conv_debug_instance);
+    return 0;
+
+err:
+    /* Zero and free allocated memory and return an error. */
+    if (replies != NULL) {
+	do {
+	    struct sudo_conv_reply *repl = &replies[n];
+	    if (repl->reply == NULL)
+		continue;
+	    freezero(repl->reply, strlen(repl->reply));
+	    repl->reply = NULL;
+	} while (n-- > 0);
+    }
+
+    sudo_debug_set_active_instance(conv_debug_instance);
+    return -1;
+}
+
+int
+sudo_conversation_1_7(int num_msgs, const struct sudo_conv_message msgs[],
+    struct sudo_conv_reply replies[])
+{
+    return sudo_conversation(num_msgs, msgs, replies, NULL);
+}
+
+int
+sudo_conversation_printf(int msg_type, const char * restrict fmt, ...)
+{
+    FILE *ttyfp = NULL;
+    FILE *fp = stdout;
+    char fmt2[1024];
+    char sbuf[8192];
+    char *buf = sbuf;
+    va_list ap;
+    int len;
+    const int conv_debug_instance = sudo_debug_get_active_instance();
+
+    sudo_debug_set_active_instance(sudo_debug_instance);
+
+    if (ISSET(msg_type, SUDO_CONV_PREFER_TTY) &&
+	    !ISSET(tgetpass_flags, TGP_STDIN)) {
+	/* Try writing to /dev/tty first. */
+	ttyfp = fopen(_PATH_TTY, "w");
+    }
+
+    switch (msg_type & 0xff) {
+    case SUDO_CONV_ERROR_MSG:
+	fp = stderr;
+	FALLTHROUGH;
+    case SUDO_CONV_INFO_MSG:
+	/* Convert nl -> cr nl in case tty is in raw mode. */
+	if (sudo_term_is_raw(fileno(ttyfp ? ttyfp : fp))) {
+	    size_t fmtlen = strlen(fmt);
+	    if (fmtlen < sizeof(fmt2) - 1 && fmtlen && fmt[fmtlen - 1] == '\n') {
+		if (fmtlen == 1) {
+		    /* Convert bare newline -> \r\n. */
+		    len = (int)fwrite("\r\n", 1, 2, ttyfp ? ttyfp : fp);
+		    if (len != 2)
+			len = -1;
+		    break;
+		}
+		if (fmt[fmtlen - 2] != '\r') {
+		    /* Convert trailing \n -> \r\n. */
+		    memcpy(fmt2, fmt, fmtlen - 1);
+		    fmt2[fmtlen - 1] = '\r';
+		    fmt2[fmtlen    ] = '\n';
+		    fmt2[fmtlen + 1] = '\0';
+		    fmt = fmt2;
+		}
+	    }
+	}
+        /*
+         * We use vsnprintf() instead of vfprintf() here to avoid
+         * problems on systems where the system printf(3) is not
+         * C99-compliant.  We use our own snprintf() on such systems.
+         */
+        va_start(ap, fmt);
+        len = vsnprintf(sbuf, sizeof(sbuf), fmt, ap);
+        va_end(ap);
+        if (len < 0 || len >= ssizeof(sbuf)) {
+            /* Try again with a dynamically-sized buffer. */
+            va_start(ap, fmt);
+            len = vasprintf(&buf, fmt, ap);
+            va_end(ap);
+        }
+        if (len != -1) {
+            if (fwrite(buf, 1, len, ttyfp ? ttyfp : fp) == 0)
+                len = -1;
+            if (buf != sbuf)
+                free(buf);
+        }
+	break;
+    default:
+	len = -1;
+	errno = EINVAL;
+	break;
+    }
+
+    if (ttyfp != NULL)
+	fclose(ttyfp);
+
+    sudo_debug_set_active_instance(conv_debug_instance);
+    return len;
+}