1 files changed, 178 insertions, 0 deletions
diff --git a/vppversion/sign.c b/vppversion/sign.c
new file mode 100644
index 00000000000..ed97894b5f5
--- /dev/null
+++ b/vppversion/sign.c
@@ -0,0 +1,178 @@
+/*
+ *------------------------------------------------------------------
+ * sign.c - sign a binary
+ * 
+ * Jan 2010, George Spelvin
+ * 
+ * Copyright (c) 2010 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <signal.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <time.h>
+#include <fcntl.h>
+#include <string.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/bitmap.h>
+#include <vppinfra/fifo.h>
+#include <vppinfra/time.h>
+#include <vppinfra/mheap.h>
+#include <vppinfra/heap.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/format.h>
+#include <vppinfra/error.h>
+#include <vppinfra/unix.h>
+
+/* Elf-file magic number */
+static unsigned char elfmag[4] = {0x7F, 'E', 'L', 'F'};
+
+int add_signature (char *file, u8 *sigfile)
+{
+    clib_error_t *e;
+    u8 *sigcontents;
+    uword siglen;
+    struct stat statb;
+    int fd;
+    char magic[4];
+    int i;
+
+    if ((e = unix_file_contents ((char *)sigfile, &sigcontents))) {
+        fformat(stderr, "%v", e->what);
+        clib_error_free (e);
+        return 1;
+    }
+
+    siglen = vec_len (sigcontents);
+
+    vec_add1(sigcontents, (siglen>>24)&0xff);
+    vec_add1(sigcontents, (siglen>>16)&0xff);
+    vec_add1(sigcontents, (siglen>> 8)&0xff);
+    vec_add1(sigcontents, (siglen>> 0)&0xff);
+    
+    /* remember the desired file mode */
+    if (stat(file, &statb) < 0) {
+        fformat(stderr, "Couldn't stat %s\n", file);
+        return 1;
+    }
+    /* Skip empty / short trout. Don't complain */
+    if (statb.st_size < 4) {
+        return 0;
+    }
+
+    /* make it writeable */
+    chmod (file, 0777);
+
+    fd = open (file, O_RDWR | O_APPEND, 0755);
+    
+    if (fd < 0) {
+        fformat (stderr, "Couldn't append to %s\n", file);
+        return 1;
+    }
+
+    /* 
+     * We feed this program a list of files with execute permission.
+     * Signing a shell script makes it taste bad, etc. etc.
+     */
+    if (read(fd, magic, 4) != 4) {
+        fformat (stderr, "Couldn't read magic number from %s\n", file);
+    }
+
+    for (i = 0; i < 4; i++) {
+        if (magic[i] != elfmag[i]) {
+            goto skip_write;
+        }
+    }
+
+    if (write (fd, sigcontents, vec_len(sigcontents)) 
+        != vec_len (sigcontents)) {
+        fformat (stderr, "Write error on %s\n", file);
+        return 1;
+    }
+
+ skip_write:
+    close(fd);
+
+    /* restore the file mode */
+    chmod (file, statb.st_mode);
+
+    return 0;
+}
+
+int mypid;
+
+int sign_one_file (char *pemfile, char *password, char *file)
+{
+    u8 *cmd;
+    u8 *t1, *t2;
+
+    t1 = format (0, "/tmp/sha256-%d%c", mypid, 0);
+    t2 = format (0, "/tmp/sig-%d%c", mypid, 0);
+
+    cmd = format (0, "openssl dgst -sha256 < %s > %s%c", file, t1, 0);
+    if (system((char *)cmd)) {
+    barf:
+        clib_warning("'%s' failed", cmd);
+        return 1;
+    }
+    vec_free(cmd);
+
+    cmd = format (0, "openssl rsautl -inkey %s -in %s -out %s ",
+                  pemfile, t1, t2);
+    cmd = format (cmd, "-passin pass:%s -sign%c", password, 0);
+
+    if (system((char *)cmd))
+        goto barf;
+
+    vec_free(cmd);
+
+    if (add_signature (file, t2))
+        return 1;
+
+    unlink ((char *)t1);
+    unlink ((char *)t2);
+
+    return (0);
+}
+
+/* usage: sign <foo.pem> <password> <list-of-files> */
+
+int main (int argc, char **argv)
+{
+    int i;
+    mypid = getpid();
+
+    if (argc < 4) {
+        fformat(stderr, "usage: %s <xxx.pem> <password> <list-of-files>\n", 
+		argv[0]);
+        exit (1);
+    }
+
+    for (i = 3; i < argc; i++) {
+        if (sign_one_file (argv[1], argv[2], argv[i])) {
+            fformat(stderr, "Left unsigned: %s\n", argv[i]);
+        }
+    }
+
+    exit (0);
+}