crypto: provide single place for hash algo information

This patch provides a single place for information about hash algorithms,
such as hash sizes and kernel driver names, which will be used by IMA
and the public key code.

Changelog:
- Fix sparse and checkpatch warnings
- Move hash algo enums to uapi for userspace signing functions.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>

5 files changed, 137 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 69ce573f1224..ba061b091d9f 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1386,6 +1386,9 @@ config CRYPTO_USER_API_SKCIPHER
           This option enables the user-spaces interface for symmetric
           key cipher algorithms.
 
+config CRYPTO_HASH_INFO
+        bool
+
 source "drivers/crypto/Kconfig"
 source crypto/asymmetric_keys/Kconfig
 
diff --git a/crypto/Makefile b/crypto/Makefile
index 80019ba8da3a..b3a7e807e08b 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -104,3 +104,4 @@ obj-$(CONFIG_CRYPTO_USER_API_SKCIPHER) += algif_skcipher.o
 obj-$(CONFIG_XOR_BLOCKS) += xor.o
 obj-$(CONFIG_ASYNC_CORE) += async_tx/
 obj-$(CONFIG_ASYMMETRIC_KEY_TYPE) += asymmetric_keys/
+obj-$(CONFIG_CRYPTO_HASH_INFO) += hash_info.o
diff --git a/crypto/hash_info.c b/crypto/hash_info.c
new file mode 100644
index 000000000000..3e7ff46f26e8
--- /dev/null
+++ b/crypto/hash_info.c
@@ -0,0 +1,56 @@
+/*
+ * Hash Info: Hash algorithms information
+ *
+ * Copyright (c) 2013 Dmitry Kasatkin <d.kasatkin@samsung.com>
+ *
+ * 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; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <linux/export.h>
+#include <crypto/hash_info.h>
+
+const char *const hash_algo_name[HASH_ALGO__LAST] = {
+        [HASH_ALGO_MD4]         = "md4",
+        [HASH_ALGO_MD5]         = "md5",
+        [HASH_ALGO_SHA1]        = "sha1",
+        [HASH_ALGO_RIPE_MD_160] = "rmd160",
+        [HASH_ALGO_SHA256]      = "sha256",
+        [HASH_ALGO_SHA384]      = "sha384",
+        [HASH_ALGO_SHA512]      = "sha512",
+        [HASH_ALGO_SHA224]      = "sha224",
+        [HASH_ALGO_RIPE_MD_128] = "rmd128",
+        [HASH_ALGO_RIPE_MD_256] = "rmd256",
+        [HASH_ALGO_RIPE_MD_320] = "rmd320",
+        [HASH_ALGO_WP_256]      = "wp256",
+        [HASH_ALGO_WP_384]      = "wp384",
+        [HASH_ALGO_WP_512]      = "wp512",
+        [HASH_ALGO_TGR_128]     = "tgr128",
+        [HASH_ALGO_TGR_160]     = "tgr160",
+        [HASH_ALGO_TGR_192]     = "tgr192",
+};
+EXPORT_SYMBOL_GPL(hash_algo_name);
+
+const int hash_digest_size[HASH_ALGO__LAST] = {
+        [HASH_ALGO_MD4]         = MD5_DIGEST_SIZE,
+        [HASH_ALGO_MD5]         = MD5_DIGEST_SIZE,
+        [HASH_ALGO_SHA1]        = SHA1_DIGEST_SIZE,
+        [HASH_ALGO_RIPE_MD_160] = RMD160_DIGEST_SIZE,
+        [HASH_ALGO_SHA256]      = SHA256_DIGEST_SIZE,
+        [HASH_ALGO_SHA384]      = SHA384_DIGEST_SIZE,
+        [HASH_ALGO_SHA512]      = SHA512_DIGEST_SIZE,
+        [HASH_ALGO_SHA224]      = SHA224_DIGEST_SIZE,
+        [HASH_ALGO_RIPE_MD_128] = RMD128_DIGEST_SIZE,
+        [HASH_ALGO_RIPE_MD_256] = RMD256_DIGEST_SIZE,
+        [HASH_ALGO_RIPE_MD_320] = RMD320_DIGEST_SIZE,
+        [HASH_ALGO_WP_256]      = WP256_DIGEST_SIZE,
+        [HASH_ALGO_WP_384]      = WP384_DIGEST_SIZE,
+        [HASH_ALGO_WP_512]      = WP512_DIGEST_SIZE,
+        [HASH_ALGO_TGR_128]     = TGR128_DIGEST_SIZE,
+        [HASH_ALGO_TGR_160]     = TGR160_DIGEST_SIZE,
+        [HASH_ALGO_TGR_192]     = TGR192_DIGEST_SIZE,
+};
+EXPORT_SYMBOL_GPL(hash_digest_size);
diff --git a/include/crypto/hash_info.h b/include/crypto/hash_info.h
new file mode 100644
index 000000000000..e1e5a3e5dd1b
--- /dev/null
+++ b/include/crypto/hash_info.h
@@ -0,0 +1,40 @@
+/*
+ * Hash Info: Hash algorithms information
+ *
+ * Copyright (c) 2013 Dmitry Kasatkin <d.kasatkin@samsung.com>
+ *
+ * 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; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#ifndef _CRYPTO_HASH_INFO_H
+#define _CRYPTO_HASH_INFO_H
+
+#include <crypto/sha.h>
+#include <crypto/md5.h>
+
+#include <uapi/linux/hash_info.h>
+
+/* not defined in include/crypto/ */
+#define RMD128_DIGEST_SIZE      16
+#define RMD160_DIGEST_SIZE      20
+#define RMD256_DIGEST_SIZE      32
+#define RMD320_DIGEST_SIZE      40
+
+/* not defined in include/crypto/ */
+#define WP512_DIGEST_SIZE       64
+#define WP384_DIGEST_SIZE       48
+#define WP256_DIGEST_SIZE       32
+
+/* not defined in include/crypto/ */
+#define TGR128_DIGEST_SIZE 16
+#define TGR160_DIGEST_SIZE 20
+#define TGR192_DIGEST_SIZE 24
+
+extern const char *const hash_algo_name[HASH_ALGO__LAST];
+extern const int hash_digest_size[HASH_ALGO__LAST];
+
+#endif /* _CRYPTO_HASH_INFO_H */
diff --git a/include/uapi/linux/hash_info.h b/include/uapi/linux/hash_info.h
new file mode 100644
index 000000000000..ca18c45f8304
--- /dev/null
+++ b/include/uapi/linux/hash_info.h
@@ -0,0 +1,37 @@
+/*
+ * Hash Info: Hash algorithms information
+ *
+ * Copyright (c) 2013 Dmitry Kasatkin <d.kasatkin@samsung.com>
+ *
+ * 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; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#ifndef _UAPI_LINUX_HASH_INFO_H
+#define _UAPI_LINUX_HASH_INFO_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
+};
+
+#endif /* _UAPI_LINUX_HASH_INFO_H */