diff --git a/lib/libstand/Makefile b/lib/libstand/Makefile
index fd720a9..4e77487 100644
--- a/lib/libstand/Makefile
+++ b/lib/libstand/Makefile
@@ -38,7 +38,7 @@ CFLAGS+=	-msoft-float -D_STANDALONE
 .endif
 
 # standalone components and stuff we have modified locally
-SRCS+=	gzguts.h zutil.h __main.c assert.c bcd.c bswap.c environment.c getopt.c gets.c \
+SRCS+=	gzguts.h zutil.h __main.c assert.c bcd.c bswap.c crc.c environment.c getopt.c gets.c \
 	globals.c pager.c printf.c strdup.c strerror.c strtol.c random.c \
 	sbrk.c twiddle.c zalloc.c zalloc_malloc.c
 
diff --git a/lib/libstand/crc.c b/lib/libstand/crc.c
new file mode 100644
index 0000000..331d390
--- /dev/null
+++ b/lib/libstand/crc.c
@@ -0,0 +1,125 @@
+/*-
+ * Copyright (c) 2012 Boris Astardzhiev / Smartcom Bulgaria AD
+ * All rights reserved.
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ */
+
+/*
+ * Simple CRC calculation of a file.
+ */
+
+#include <sys/cdefs.h>
+#include "stand.h"
+#include <string.h>
+#include "../libz/zlib.h"
+
+/*
+ * Display checksum.
+ */
+
+int
+crc32_file(const char *fname)
+{
+	unsigned long 	crc = 0UL;
+	char 		buf[80];
+	size_t 		bytes;
+	int		fd;
+	int		res;
+	off_t 		end_off;
+	struct	stat 	st;
+
+	res = 0;
+	fd = open(fname, O_RDONLY);
+	if (fd == -1) {
+		printf("can't open '%s': %s\n", fname, strerror(errno));
+		res = -1;
+		return (res);
+	}
+	
+	/*
+	 * Check if it is a regular file.
+	 */
+	memset(&st, 0, sizeof(st));
+	if (fstat(fd, &st) == -1) {
+		printf("can't get statistics of '%s': %s\n", fname,
+		    strerror(errno));
+		close(fd);
+		res = -1;
+		return (res);
+	}
+
+	if (!(S_ISREG(st.st_mode))) {
+		printf("'%s' is not a regular file\n", fname);
+		close(fd);
+		res = -1;
+		return (res);
+	}
+
+	/* 
+	 * Grab file size. 
+	 */	
+	end_off = lseek(fd, 0, SEEK_END);
+	if (end_off == -1) {
+		printf("can't get end of '%s': %s\n", fname, strerror(errno));
+		close(fd);
+		res = -1;
+		return (res);
+	}
+	
+	if (lseek(fd, 0, SEEK_SET) == -1) {
+		printf("can't set offset to '%s': %s\n", fname,
+		    strerror(errno));
+		close(fd);
+		res = -1;
+		return (res);
+	}
+
+	/* 
+	 * Calculate checksum.
+	 */
+	crc = crc32(crc, 0, 0);
+	for (;;) {
+		bytes = read(fd, buf, sizeof(buf));
+		if (bytes < 0) {
+			res = -1;
+			break;
+		}
+
+		if (!bytes)
+			break;
+
+		crc = crc32(crc, buf, bytes);
+	}
+
+	if (!res) {
+		printf("file:   %s\n", fname);
+		printf("\t size: %llu\n", end_off);
+		printf("\tcrc32: 0x%08lx\n", crc);
+	} else
+		printf("can't calculate crc32 of '%s'\n", fname);
+
+	close(fd);
+
+	return (res);
+}
+
diff --git a/lib/libstand/stand.h b/lib/libstand/stand.h
index 10bb829..ff75bed 100644
--- a/lib/libstand/stand.h
+++ b/lib/libstand/stand.h
@@ -265,6 +265,9 @@ extern char	*optarg;			/* getopt(3) external variables */
 extern int	optind, opterr, optopt, optreset;
 extern int	getopt(int, char * const [], const char *);
 
+/* crc.c */
+extern int	crc32_file(const char *fname);
+
 /* pager.c */
 extern void	pager_open(void);
 extern void	pager_close(void);
diff --git a/sys/boot/common/commands.c b/sys/boot/common/commands.c
index 7fba019..c445d71 100644
--- a/sys/boot/common/commands.c
+++ b/sys/boot/common/commands.c
@@ -497,3 +497,20 @@ command_lsdev(int argc, char *argv[])
     return(CMD_OK);
 }
 
+/*
+ * Calculate CRC32 of a file.
+ */
+COMMAND_SET(crc32, "crc32", "calculate crc32 of a file", command_crc32);
+
+static int
+command_crc32(int argc, char *argv[])
+{
+    int i, res;
+
+    res = 0;
+    for (i = 1; (i < argc) && !res; i++)
+    	res |= crc32_file(argv[i]);
+
+    return (!res ? (CMD_OK) : (CMD_ERROR));
+}
+
diff --git a/sys/boot/common/loader.8 b/sys/boot/common/loader.8
index 7386f72..8ec9143 100644
--- a/sys/boot/common/loader.8
+++ b/sys/boot/common/loader.8
@@ -174,6 +174,8 @@ The behavior of this builtin is changed if
 .Xr loader.4th 8
 is loaded.
 .Pp
+.It Ic crc32
+Calculate CRC32 of a specified file.
 .It Ic echo Xo
 .Op Fl n
 .Op Aq message