crypto: michael_mic - Switch to shash

This patch changes michael_mic to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/Kconfig b/crypto/Kconfig
index bc29216..3f88a52 100644 (file)
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -288,7 +288,7 @@ config CRYPTO_MD5
 
 config CRYPTO_MICHAEL_MIC
        tristate "Michael MIC keyed digest algorithm"
-       select CRYPTO_ALGAPI
+       select CRYPTO_HASH
        help
          Michael MIC is used for message integrity protection in TKIP
          (IEEE 802.11i). This algorithm is required for TKIP, but it

diff --git a/crypto/michael_mic.c b/crypto/michael_mic.c
index 9e917b8..079b761 100644 (file)
--- a/crypto/michael_mic.c
+++ b/crypto/michael_mic.c
@@ -9,23 +9,25 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-
+#include <crypto/internal/hash.h>
 #include <asm/byteorder.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/string.h>
-#include <linux/crypto.h>
 #include <linux/types.h>
 
 
 struct michael_mic_ctx {
+       u32 l, r;
+};
+
+struct michael_mic_desc_ctx {
        u8 pending[4];
        size_t pending_len;
 
        u32 l, r;
 };
 
-
 static inline u32 xswap(u32 val)
 {
        return ((val & 0x00ff00ff) << 8) | ((val & 0xff00ff00) >> 8);
@@ -45,17 +47,22 @@ do {                                \
 } while (0)
 
 
-static void michael_init(struct crypto_tfm *tfm)
+static int michael_init(struct shash_desc *desc)
 {
-       struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
+       struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
+       struct michael_mic_ctx *ctx = crypto_shash_ctx(desc->tfm);
        mctx->pending_len = 0;
+       mctx->l = ctx->l;
+       mctx->r = ctx->r;
+
+       return 0;
 }
 
 
-static void michael_update(struct crypto_tfm *tfm, const u8 *data,
+static int michael_update(struct shash_desc *desc, const u8 *data,
                           unsigned int len)
 {
-       struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
+       struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
        const __le32 *src;
 
        if (mctx->pending_len) {
@@ -68,7 +75,7 @@ static void michael_update(struct crypto_tfm *tfm, const u8 *data,
                len -= flen;
 
                if (mctx->pending_len < 4)
-                       return;
+                       return 0;
 
                src = (const __le32 *)mctx->pending;
                mctx->l ^= le32_to_cpup(src);
@@ -88,12 +95,14 @@ static void michael_update(struct crypto_tfm *tfm, const u8 *data,
                mctx->pending_len = len;
                memcpy(mctx->pending, src, len);
        }
+
+       return 0;
 }
 
 
-static void michael_final(struct crypto_tfm *tfm, u8 *out)
+static int michael_final(struct shash_desc *desc, u8 *out)
 {
-       struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
+       struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
        u8 *data = mctx->pending;
        __le32 *dst = (__le32 *)out;
 
@@ -119,17 +128,20 @@ static void michael_final(struct crypto_tfm *tfm, u8 *out)
 
        dst[0] = cpu_to_le32(mctx->l);
        dst[1] = cpu_to_le32(mctx->r);
+
+       return 0;
 }
 
 
-static int michael_setkey(struct crypto_tfm *tfm, const u8 *key,
+static int michael_setkey(struct crypto_shash *tfm, const u8 *key,
                          unsigned int keylen)
 {
-       struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
+       struct michael_mic_ctx *mctx = crypto_shash_ctx(tfm);
+
        const __le32 *data = (const __le32 *)key;
 
        if (keylen != 8) {
-               tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+               crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
                return -EINVAL;
        }
 
@@ -138,33 +150,31 @@ static int michael_setkey(struct crypto_tfm *tfm, const u8 *key,
        return 0;
 }
 
-
-static struct crypto_alg michael_mic_alg = {
-       .cra_name       = "michael_mic",
-       .cra_flags      = CRYPTO_ALG_TYPE_DIGEST,
-       .cra_blocksize  = 8,
-       .cra_ctxsize    = sizeof(struct michael_mic_ctx),
-       .cra_module     = THIS_MODULE,
-       .cra_alignmask  = 3,
-       .cra_list       = LIST_HEAD_INIT(michael_mic_alg.cra_list),
-       .cra_u          = { .digest = {
-       .dia_digestsize = 8,
-       .dia_init       = michael_init,
-       .dia_update     = michael_update,
-       .dia_final      = michael_final,
-       .dia_setkey     = michael_setkey } }
+static struct shash_alg alg = {
+       .digestsize             =       8,
+       .setkey                 =       michael_setkey,
+       .init                   =       michael_init,
+       .update                 =       michael_update,
+       .final                  =       michael_final,
+       .descsize               =       sizeof(struct michael_mic_desc_ctx),
+       .base                   =       {
+               .cra_name               =       "michael_mic",
+               .cra_blocksize          =       8,
+               .cra_alignmask          =       3,
+               .cra_ctxsize            =       sizeof(struct michael_mic_ctx),
+               .cra_module             =       THIS_MODULE,
+       }
 };
 
-
 static int __init michael_mic_init(void)
 {
-       return crypto_register_alg(&michael_mic_alg);
+       return crypto_register_shash(&alg);
 }
 
 
 static void __exit michael_mic_exit(void)
 {
-       crypto_unregister_alg(&michael_mic_alg);
+       crypto_unregister_shash(&alg);
 }