1 files changed, 80 insertions, 0 deletions
diff --git a/lib/libsecureboot/readfile.c b/lib/libsecureboot/readfile.c
new file mode 100644
index 000000000000..19784f6f4139
--- /dev/null
+++ b/lib/libsecureboot/readfile.c
@@ -0,0 +1,80 @@
+/*-
+ * Copyright (c) 2017-2018, Juniper Networks, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+#include <libsecureboot.h>
+
+unsigned char *
+read_fd(int fd, size_t len)
+{
+	int m, n, x;
+	unsigned char *buf;
+
+	buf = malloc(len + 1);
+	if (buf != NULL) {
+		for (x = 0, m = len; m > 0; ) {
+			n = read(fd, &buf[x], m);
+			if (n < 0)
+				break;
+			if (n > 0) {
+				m -= n;
+				x += n;
+			}
+		}
+		if (m == 0) {
+			buf[len] = '\0';
+			return (buf);
+		}
+		free(buf);
+	}
+	return (NULL);
+}
+
+unsigned char *
+read_file(const char *path, size_t *len)
+{
+	struct stat st;
+	unsigned char *ucp;
+	int fd;
+
+    	if (len)
+		*len = 0;
+	if ((fd = open(path, O_RDONLY)) < 0)
+		return (NULL);
+	fstat(fd, &st);
+	ucp = read_fd(fd, st.st_size);
+	close(fd);
+	if (ucp != NULL) {
+		if (len != NULL)
+			*len = st.st_size;
+	}
+#ifdef _STANDALONE
+	else
+		printf("%s: out of memory! %lu\n", __func__,
+		    (unsigned long)len);
+#endif
+
+	return (ucp);
+}
+