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>
This commit is contained in:
Adrian-Ken Rueegsegger
Herbert Xu
parent
4946510baa
commit
19e2bf1467
2 changed files with 42 additions and 32 deletions
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@ -288,7 +288,7 @@ config CRYPTO_MD5
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config CRYPTO_MICHAEL_MIC
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tristate "Michael MIC keyed digest algorithm"
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select CRYPTO_ALGAPI
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select CRYPTO_HASH
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help
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Michael MIC is used for message integrity protection in TKIP
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(IEEE 802.11i). This algorithm is required for TKIP, but it
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@ -9,23 +9,25 @@
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <crypto/internal/hash.h>
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#include <asm/byteorder.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/crypto.h>
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#include <linux/types.h>
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struct michael_mic_ctx {
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u32 l, r;
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};
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struct michael_mic_desc_ctx {
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u8 pending[4];
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size_t pending_len;
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u32 l, r;
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};
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static inline u32 xswap(u32 val)
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{
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return ((val & 0x00ff00ff) << 8) | ((val & 0xff00ff00) >> 8);
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@ -45,17 +47,22 @@ do { \
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} while (0)
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static void michael_init(struct crypto_tfm *tfm)
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static int michael_init(struct shash_desc *desc)
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{
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struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
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struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
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struct michael_mic_ctx *ctx = crypto_shash_ctx(desc->tfm);
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mctx->pending_len = 0;
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mctx->l = ctx->l;
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mctx->r = ctx->r;
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return 0;
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}
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static void michael_update(struct crypto_tfm *tfm, const u8 *data,
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static int michael_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
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struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
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const __le32 *src;
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if (mctx->pending_len) {
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@ -68,7 +75,7 @@ static void michael_update(struct crypto_tfm *tfm, const u8 *data,
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len -= flen;
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if (mctx->pending_len < 4)
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return;
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return 0;
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src = (const __le32 *)mctx->pending;
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mctx->l ^= le32_to_cpup(src);
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@ -88,12 +95,14 @@ static void michael_update(struct crypto_tfm *tfm, const u8 *data,
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mctx->pending_len = len;
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memcpy(mctx->pending, src, len);
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}
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return 0;
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}
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static void michael_final(struct crypto_tfm *tfm, u8 *out)
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static int michael_final(struct shash_desc *desc, u8 *out)
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{
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struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
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struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
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u8 *data = mctx->pending;
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__le32 *dst = (__le32 *)out;
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@ -119,17 +128,20 @@ static void michael_final(struct crypto_tfm *tfm, u8 *out)
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dst[0] = cpu_to_le32(mctx->l);
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dst[1] = cpu_to_le32(mctx->r);
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return 0;
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}
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static int michael_setkey(struct crypto_tfm *tfm, const u8 *key,
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static int michael_setkey(struct crypto_shash *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm);
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struct michael_mic_ctx *mctx = crypto_shash_ctx(tfm);
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const __le32 *data = (const __le32 *)key;
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if (keylen != 8) {
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tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
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crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
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return -EINVAL;
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}
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@ -138,33 +150,31 @@ static int michael_setkey(struct crypto_tfm *tfm, const u8 *key,
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return 0;
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}
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static struct crypto_alg michael_mic_alg = {
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.cra_name = "michael_mic",
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.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
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.cra_blocksize = 8,
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.cra_ctxsize = sizeof(struct michael_mic_ctx),
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.cra_module = THIS_MODULE,
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.cra_alignmask = 3,
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.cra_list = LIST_HEAD_INIT(michael_mic_alg.cra_list),
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.cra_u = { .digest = {
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.dia_digestsize = 8,
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.dia_init = michael_init,
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.dia_update = michael_update,
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.dia_final = michael_final,
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.dia_setkey = michael_setkey } }
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static struct shash_alg alg = {
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.digestsize = 8,
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.setkey = michael_setkey,
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.init = michael_init,
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.update = michael_update,
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.final = michael_final,
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.descsize = sizeof(struct michael_mic_desc_ctx),
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.base = {
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.cra_name = "michael_mic",
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.cra_blocksize = 8,
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.cra_alignmask = 3,
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.cra_ctxsize = sizeof(struct michael_mic_ctx),
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.cra_module = THIS_MODULE,
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}
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};
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static int __init michael_mic_init(void)
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{
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return crypto_register_alg(&michael_mic_alg);
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return crypto_register_shash(&alg);
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}
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static void __exit michael_mic_exit(void)
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{
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crypto_unregister_alg(&michael_mic_alg);
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crypto_unregister_shash(&alg);
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}
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