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-rw-r--r--comm/third_party/libgcrypt/src/getrandom.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/comm/third_party/libgcrypt/src/getrandom.c b/comm/third_party/libgcrypt/src/getrandom.c
new file mode 100644
index 0000000000..f9bb5c0c5f
--- /dev/null
+++ b/comm/third_party/libgcrypt/src/getrandom.c
@@ -0,0 +1,326 @@
+/* getrandom.c - Libgcrypt Random Number client
+ * Copyright (C) 2006 Free Software Foundation, Inc.
+ *
+ * Getrandom 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.
+ *
+ * Getrandom is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdarg.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <errno.h>
+
+#define PGM "getrandom"
+#define MYVERSION_LINE PGM " (Libgcrypt) " VERSION
+#define BUGREPORT_LINE "\nReport bugs to <bug-libgcrypt@gnupg.org>.\n"
+
+
+static void
+logit (const char *format, ...)
+{
+ va_list arg_ptr;
+
+ va_start (arg_ptr, format) ;
+ fputs (PGM ": ", stderr);
+ vfprintf (stderr, format, arg_ptr);
+ putc ('\n', stderr);
+ va_end (arg_ptr);
+}
+
+
+/* Send LENGTH bytes of BUFFER to file descriptor FD. Returns 0 on
+ success or another value on write error. */
+static int
+writen (int fd, const void *buffer, size_t length)
+{
+ while (length)
+ {
+ ssize_t n;
+
+ do
+ n = write (fd, buffer, length);
+ while (n < 0 && errno == EINTR);
+ if (n < 0)
+ {
+ logit ("write error: %s", strerror (errno));
+ return -1; /* write error */
+ }
+ length -= n;
+ buffer = (const char *)buffer + n;
+ }
+ return 0; /* Okay */
+}
+
+
+
+
+static void
+print_version (int with_help)
+{
+ fputs (MYVERSION_LINE "\n"
+ "Copyright (C) 2006 Free Software Foundation, Inc.\n"
+ "License GPLv2+: GNU GPL version 2 or later "
+ "<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>\n"
+ "This is free software: you are free to change and redistribute it.\n"
+ "There is NO WARRANTY, to the extent permitted by law.\n",
+ stdout);
+
+ if (with_help)
+ fputs ("\n"
+ "Usage: " PGM " [OPTIONS] NBYTES\n"
+ "Connect to libgcrypt's random number daemon and "
+ "return random numbers"
+ "\n"
+ " --nonce Return weak random suitable for a nonce\n"
+ " --very-strong Return very strong random\n"
+ " --ping Send a ping\n"
+ " --socket NAME Name of sockket to connect to\n"
+ " --hex Return result as a hex dump\n"
+ " --verbose Show what we are doing\n"
+ " --version Print version of the program and exit\n"
+ " --help Display this help and exit\n"
+ BUGREPORT_LINE, stdout );
+
+ exit (0);
+}
+
+static int
+print_usage (void)
+{
+ fputs ("usage: " PGM " [OPTIONS] NBYTES\n", stderr);
+ fputs (" (use --help to display options)\n", stderr);
+ exit (1);
+}
+
+
+int
+main (int argc, char **argv)
+{
+ struct sockaddr_un *srvr_addr;
+ socklen_t addrlen;
+ int fd;
+ int rc;
+ unsigned char buffer[300];
+ int nleft, nread;
+ const char *socketname = "/var/run/libgcrypt/S.gcryptrnd";
+ int do_ping = 0;
+ int get_nonce = 0;
+ int get_very_strong = 0;
+ int req_nbytes, nbytes, n;
+ int verbose = 0;
+ int fail = 0;
+ int do_hex = 0;
+
+ if (argc)
+ {
+ argc--; argv++;
+ }
+ while (argc && **argv == '-' && (*argv)[1] == '-')
+ {
+ if (!(*argv)[2])
+ {
+ argc--; argv++;
+ break;
+ }
+ else if (!strcmp (*argv, "--version"))
+ print_version (0);
+ else if (!strcmp (*argv, "--help"))
+ print_version (1);
+ else if (!strcmp (*argv, "--socket") && argc > 1 )
+ {
+ argc--; argv++;
+ socketname = *argv;
+ argc--; argv++;
+ }
+ else if (!strcmp (*argv, "--nonce"))
+ {
+ argc--; argv++;
+ get_nonce = 1;
+ }
+ else if (!strcmp (*argv, "--very-strong"))
+ {
+ argc--; argv++;
+ get_very_strong = 1;
+ }
+ else if (!strcmp (*argv, "--ping"))
+ {
+ argc--; argv++;
+ do_ping = 1;
+ }
+ else if (!strcmp (*argv, "--hex"))
+ {
+ argc--; argv++;
+ do_hex = 1;
+ }
+ else if (!strcmp (*argv, "--verbose"))
+ {
+ argc--; argv++;
+ verbose = 1;
+ }
+ else
+ print_usage ();
+ }
+
+
+ if (!argc && do_ping)
+ ; /* This is allowed. */
+ else if (argc != 1)
+ print_usage ();
+ req_nbytes = argc? atoi (*argv) : 0;
+
+ if (req_nbytes < 0)
+ print_usage ();
+
+ /* Create a socket. */
+ fd = socket (AF_UNIX, SOCK_STREAM, 0);
+ if (fd == -1)
+ {
+ logit ("can't create socket: %s", strerror (errno));
+ exit (1);
+ }
+ srvr_addr = malloc (sizeof *srvr_addr);
+ if (!srvr_addr)
+ {
+ logit ("malloc failed: %s", strerror (errno));
+ exit (1);
+ }
+ memset (srvr_addr, 0, sizeof *srvr_addr);
+ srvr_addr->sun_family = AF_UNIX;
+ if (strlen (socketname) + 1 >= sizeof (srvr_addr->sun_path))
+ {
+ logit ("socket name `%s' too long", socketname);
+ exit (1);
+ }
+ strcpy (srvr_addr->sun_path, socketname);
+ addrlen = (offsetof (struct sockaddr_un, sun_path)
+ + strlen (srvr_addr->sun_path) + 1);
+ rc = connect (fd, (struct sockaddr*) srvr_addr, addrlen);
+ if (rc == -1)
+ {
+ logit ("error connecting socket `%s': %s",
+ srvr_addr->sun_path, strerror (errno));
+ close (fd);
+ exit (1);
+ }
+
+ do
+ {
+ nbytes = req_nbytes > 255? 255 : req_nbytes;
+ req_nbytes -= nbytes;
+
+ buffer[0] = 3;
+ if (do_ping)
+ buffer[1] = 0;
+ else if (get_nonce)
+ buffer[1] = 10;
+ else if (get_very_strong)
+ buffer[1] = 12;
+ else
+ buffer[1] = 11;
+ buffer[2] = nbytes;
+ if (writen (fd, buffer, 3))
+ fail = 1;
+ else
+ {
+ for (nleft=2, nread=0; nleft > 0; )
+ {
+ do
+ n = read (fd, buffer+nread, nleft);
+ while (n < 0 && errno == EINTR);
+ if (n < 0)
+ {
+ logit ("read error: %s", strerror (errno));
+ exit (1);
+ }
+ nleft -= n;
+ nread += n;
+ if (nread && buffer[0])
+ {
+ logit ("server returned error code %d", buffer[0]);
+ exit (1);
+ }
+ }
+ if (verbose)
+ logit ("received response with %d bytes of data", buffer[1]);
+ if (buffer[1] < nbytes)
+ {
+ logit ("warning: server returned less bytes than requested");
+ fail = 1;
+ }
+ else if (buffer[1] > nbytes && !do_ping)
+ {
+ logit ("warning: server returned more bytes than requested");
+ fail = 1;
+ }
+ nbytes = buffer[1];
+ if (nbytes > sizeof buffer)
+ {
+ logit ("buffer too short to receive data");
+ exit (1);
+ }
+
+ for (nleft=nbytes, nread=0; nleft > 0; )
+ {
+ do
+ n = read (fd, buffer+nread, nleft);
+ while (n < 0 && errno == EINTR);
+ if (n < 0)
+ {
+ logit ("read error: %s", strerror (errno));
+ exit (1);
+ }
+ nleft -= n;
+ nread += n;
+ }
+
+ if (do_hex)
+ {
+ for (n=0; n < nbytes; n++)
+ {
+ if (!n)
+ ;
+ else if (!(n % 16))
+ putchar ('\n');
+ else
+ putchar (' ');
+ printf ("%02X", buffer[n]);
+ }
+ if (nbytes)
+ putchar ('\n');
+ }
+ else
+ {
+ if (fwrite (buffer, nbytes, 1, stdout) != 1)
+ {
+ logit ("error writing to stdout: %s", strerror (errno));
+ fail = 1;
+ }
+ }
+ }
+ }
+ while (!fail && req_nbytes);
+
+ close (fd);
+ free (srvr_addr);
+ return fail? 1 : 0;
+}
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