[RFC] digest: Add enum

[Jan Luebbe]

From: Sascha Hauer <s.hauer at pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---

This is also needed as the first patch for the FIT support series. It seems
I can't count to 5.

 common/digest.c  | 12 ++++++++++++
 crypto/md5.c     |  1 +
 crypto/sha1.c    |  1 +
 crypto/sha2.c    |  2 ++
 include/digest.h | 24 ++++++++++++++++++++++++
 5 files changed, 40 insertions(+)

diff --git a/common/digest.c b/common/digest.c
index ae414ba5d599..51be2ca4148b 100644
--- a/common/digest.c
+++ b/common/digest.c
@@ -75,6 +75,18 @@ struct digest* digest_get_by_name(char* name)
 }
 EXPORT_SYMBOL_GPL(digest_get_by_name);
 
+struct digest *digest_get(enum hash_algo algo)
+{
+	struct digest* d;
+
+	list_for_each_entry(d, &digests, list)
+		if (d->algo == algo)
+			return d;
+	return NULL;
+
+}
+EXPORT_SYMBOL_GPL(digest_get);
+
 int digest_file_window(struct digest *d, char *filename,
 		       unsigned char *hash,
 		       ulong start, ulong size)
diff --git a/crypto/md5.c b/crypto/md5.c
index 6c4ca1dd59b8..87728338708e 100644
--- a/crypto/md5.c
+++ b/crypto/md5.c
@@ -305,6 +305,7 @@ static struct md5 m = {
 		.update = digest_md5_update,
 		.final = digest_md5_final,
 		.length = 16,
+		.algo = HASH_ALGO_MD5,
 	}
 };
 
diff --git a/crypto/sha1.c b/crypto/sha1.c
index 58d14a8b3f39..29fcdbae59a7 100644
--- a/crypto/sha1.c
+++ b/crypto/sha1.c
@@ -326,6 +326,7 @@ static struct sha1 m = {
 		.update = digest_sha1_update,
 		.final = digest_sha1_final,
 		.length = SHA1_SUM_LEN,
+		.algo = HASH_ALGO_SHA1,
 	}
 };
 
diff --git a/crypto/sha2.c b/crypto/sha2.c
index 00a1af3419c6..72d43015687c 100644
--- a/crypto/sha2.c
+++ b/crypto/sha2.c
@@ -316,6 +316,7 @@ static struct sha2 m224 = {
 		.update = digest_sha2_update,
 		.final = digest_sha2_final,
 		.length = SHA224_SUM_LEN,
+		.algo = HASH_ALGO_SHA224,
 	}
 };
 #endif
@@ -337,6 +338,7 @@ static struct sha2 m256 = {
 		.update = digest_sha2_update,
 		.final = digest_sha2_final,
 		.length = SHA256_SUM_LEN,
+		.algo = HASH_ALGO_SHA256,
 	}
 };
 #endif
diff --git a/include/digest.h b/include/digest.h
index 8563c10128fe..62f6248d0768 100644
--- a/include/digest.h
+++ b/include/digest.h
@@ -21,6 +21,27 @@
 
 #include <linux/list.h>
 
+enum hash_algo {
+	HASH_ALGO_MD4,
+	HASH_ALGO_MD5,
+	HASH_ALGO_SHA1,
+	HASH_ALGO_RIPE_MD_160,
+	HASH_ALGO_SHA256,
+	HASH_ALGO_SHA384,
+	HASH_ALGO_SHA512,
+	HASH_ALGO_SHA224,
+	HASH_ALGO_RIPE_MD_128,
+	HASH_ALGO_RIPE_MD_256,
+	HASH_ALGO_RIPE_MD_320,
+	HASH_ALGO_WP_256,
+	HASH_ALGO_WP_384,
+	HASH_ALGO_WP_512,
+	HASH_ALGO_TGR_128,
+	HASH_ALGO_TGR_160,
+	HASH_ALGO_TGR_192,
+	HASH_ALGO__LAST
+};
+
 struct digest
 {
 	char *name;
@@ -31,6 +52,8 @@ struct digest
 
 	unsigned int length;
 
+	enum hash_algo algo;
+
 	struct list_head list;
 };
 
@@ -41,6 +64,7 @@ int digest_register(struct digest *d);
 void digest_unregister(struct digest *d);
 
 struct digest* digest_get_by_name(char* name);
+struct digest *digest_get(enum hash_algo);
 
 int digest_file_window(struct digest *d, char *filename,
 		       unsigned char *hash,
-- 
2.1.4