linux-kernel - [PATCH 01/10] Provide a binary to hex conversion function [ver #2]

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Message-ID: <20140915204502.27499.41387.stgit@warthog.procyon.org.uk>
Date:	Mon, 15 Sep 2014 21:45:02 +0100
From:	David Howells <dhowells@...hat.com>
To:	vgoyal@...hat.com
Cc:	dhowells@...hat.com, keyrings@...ux-nfs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 01/10] Provide a binary to hex conversion function [ver #2]

Provide a function to convert a buffer of binary data into an unterminated
ascii hex string representation of that data.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 include/linux/kernel.h |    1 +
 lib/hexdump.c          |   16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 95624bed87ef..7c0ad8e38510 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -496,6 +496,7 @@ static inline char *hex_byte_pack_upper(char *buf, u8 byte)
 
 extern int hex_to_bin(char ch);
 extern int __must_check hex2bin(u8 *dst, const char *src, size_t count);
+extern char *bin2hex(char *dst, const void *src, size_t count);
 
 bool mac_pton(const char *s, u8 *mac);
 
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 8499c810909a..270773b91923 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -59,6 +59,22 @@ int hex2bin(u8 *dst, const char *src, size_t count)
 EXPORT_SYMBOL(hex2bin);
 
 /**
+ * bin2hex - convert binary data to an ascii hexadecimal string
+ * @dst: ascii hexadecimal result
+ * @src: binary data
+ * @count: binary data length
+ */
+char *bin2hex(char *dst, const void *src, size_t count)
+{
+	const unsigned char *_src = src;
+
+	while (count--)
+		dst = hex_byte_pack(dst, *_src++);
+	return dst;
+}
+EXPORT_SYMBOL(bin2hex);
+
+/**
  * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
  * @buf: data blob to dump
  * @len: number of bytes in the @buf

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