From 1ac61317c64f8fda2ab533200dffce5fd3edcbf6 Mon Sep 17 00:00:00 2001
From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Date: Wed, 11 Mar 2015 17:53:02 +0100
Subject: digest: move digest.c to crypto

with not the rest of the implementation

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 crypto/digest.c | 174 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 crypto/digest.c

(limited to 'crypto/digest.c')

diff --git a/crypto/digest.c b/crypto/digest.c
new file mode 100644
index 0000000000..ae414ba5d5
--- /dev/null
+++ b/crypto/digest.c
@@ -0,0 +1,174 @@
+/*
+ * (C) Copyright 2008-2010 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program 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; version 2 of
+ * the License.
+ *
+ * This program 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.
+ *
+ */
+
+#include <common.h>
+#include <digest.h>
+#include <malloc.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <linux/stat.h>
+#include <errno.h>
+#include <module.h>
+#include <linux/err.h>
+
+static LIST_HEAD(digests);
+
+static int dummy_init(struct digest *d)
+{
+	return 0;
+}
+
+int digest_register(struct digest *d)
+{
+	if (!d || !d->name || !d->update || !d->final || d->length < 1)
+		return -EINVAL;
+
+	if (!d->init)
+		d->init = dummy_init;
+
+	if (digest_get_by_name(d->name))
+		return -EEXIST;
+
+	list_add_tail(&d->list, &digests);
+
+	return 0;
+}
+EXPORT_SYMBOL(digest_register);
+
+void digest_unregister(struct digest *d)
+{
+	if (!d)
+		return;
+
+	list_del(&d->list);
+}
+EXPORT_SYMBOL(digest_unregister);
+
+struct digest* digest_get_by_name(char* name)
+{
+	struct digest* d;
+
+	if (!name)
+		return NULL;
+
+	list_for_each_entry(d, &digests, list) {
+		if(strcmp(d->name, name) == 0)
+			return d;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(digest_get_by_name);
+
+int digest_file_window(struct digest *d, char *filename,
+		       unsigned char *hash,
+		       ulong start, ulong size)
+{
+	ulong len = 0;
+	int fd, now, ret = 0;
+	unsigned char *buf;
+	int flags = 0;
+
+	d->init(d);
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0) {
+		perror(filename);
+		return fd;
+	}
+
+	buf = memmap(fd, PROT_READ);
+	if (buf == (void *)-1) {
+		buf = xmalloc(4096);
+		flags = 1;
+	}
+
+	if (start > 0) {
+		if (flags) {
+			ret = lseek(fd, start, SEEK_SET);
+			if (ret == -1) {
+				perror("lseek");
+				goto out;
+			}
+		} else {
+			buf += start;
+		}
+	}
+
+	while (size) {
+		now = min((ulong)4096, size);
+		if (flags) {
+			now = read(fd, buf, now);
+			if (now < 0) {
+				ret = now;
+				perror("read");
+				goto out_free;
+			}
+			if (!now)
+				break;
+		}
+
+		if (ctrlc()) {
+			ret = -EINTR;
+			goto out_free;
+		}
+
+		d->update(d, buf, now);
+		size -= now;
+		len += now;
+	}
+
+	d->final(d, hash);
+
+out_free:
+	if (flags)
+		free(buf);
+out:
+	close(fd);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(digest_file_window);
+
+int digest_file(struct digest *d, char *filename,
+		       unsigned char *hash)
+{
+	struct stat st;
+	int ret;
+
+	ret = stat(filename, &st);
+
+	if (ret < 0)
+		return ret;
+
+	return digest_file_window(d, filename, hash, 0, st.st_size);
+}
+EXPORT_SYMBOL_GPL(digest_file);
+
+int digest_file_by_name(char *algo, char *filename,
+		       unsigned char *hash)
+{
+	struct digest *d;
+
+	d = digest_get_by_name(algo);
+	if (!d)
+		return -EIO;
+
+	return digest_file(d, filename, hash);
+}
+EXPORT_SYMBOL_GPL(digest_file_by_name);
-- 
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