crypto: aes-generic - drop alignment requirement

[linux-2.6-microblaze.git] / crypto / aes_generic.c

diff --git a/crypto/aes_generic.c b/crypto/aes_generic.c
index 3dd1011..ca554d5 100644 (file)
--- a/crypto/aes_generic.c
+++ b/crypto/aes_generic.c
@@ -54,6 +54,7 @@
 #include <linux/errno.h>
 #include <linux/crypto.h>
 #include <asm/byteorder.h>
+#include <asm/unaligned.h>
 
 static inline u8 byte(const u32 x, const unsigned n)
 {
@@ -1216,7 +1217,6 @@ EXPORT_SYMBOL_GPL(crypto_il_tab);
 int crypto_aes_expand_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
                unsigned int key_len)
 {
-       const __le32 *key = (const __le32 *)in_key;
        u32 i, t, u, v, w, j;
 
        if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
@@ -1225,10 +1225,15 @@ int crypto_aes_expand_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
 
        ctx->key_length = key_len;
 
-       ctx->key_dec[key_len + 24] = ctx->key_enc[0] = le32_to_cpu(key[0]);
-       ctx->key_dec[key_len + 25] = ctx->key_enc[1] = le32_to_cpu(key[1]);
-       ctx->key_dec[key_len + 26] = ctx->key_enc[2] = le32_to_cpu(key[2]);
-       ctx->key_dec[key_len + 27] = ctx->key_enc[3] = le32_to_cpu(key[3]);
+       ctx->key_enc[0] = get_unaligned_le32(in_key);
+       ctx->key_enc[1] = get_unaligned_le32(in_key + 4);
+       ctx->key_enc[2] = get_unaligned_le32(in_key + 8);
+       ctx->key_enc[3] = get_unaligned_le32(in_key + 12);
+
+       ctx->key_dec[key_len + 24] = ctx->key_enc[0];
+       ctx->key_dec[key_len + 25] = ctx->key_enc[1];
+       ctx->key_dec[key_len + 26] = ctx->key_enc[2];
+       ctx->key_dec[key_len + 27] = ctx->key_enc[3];
 
        switch (key_len) {
        case AES_KEYSIZE_128:
@@ -1238,17 +1243,17 @@ int crypto_aes_expand_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
                break;
 
        case AES_KEYSIZE_192:
-               ctx->key_enc[4] = le32_to_cpu(key[4]);
-               t = ctx->key_enc[5] = le32_to_cpu(key[5]);
+               ctx->key_enc[4] = get_unaligned_le32(in_key + 16);
+               t = ctx->key_enc[5] = get_unaligned_le32(in_key + 20);
                for (i = 0; i < 8; ++i)
                        loop6(i);
                break;
 
        case AES_KEYSIZE_256:
-               ctx->key_enc[4] = le32_to_cpu(key[4]);
-               ctx->key_enc[5] = le32_to_cpu(key[5]);
-               ctx->key_enc[6] = le32_to_cpu(key[6]);
-               t = ctx->key_enc[7] = le32_to_cpu(key[7]);
+               ctx->key_enc[4] = get_unaligned_le32(in_key + 16);
+               ctx->key_enc[5] = get_unaligned_le32(in_key + 20);
+               ctx->key_enc[6] = get_unaligned_le32(in_key + 24);
+               t = ctx->key_enc[7] = get_unaligned_le32(in_key + 28);
                for (i = 0; i < 6; ++i)
                        loop8(i);
                loop8tophalf(i);
@@ -1329,16 +1334,14 @@ EXPORT_SYMBOL_GPL(crypto_aes_set_key);
 static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
        const struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
-       const __le32 *src = (const __le32 *)in;
-       __le32 *dst = (__le32 *)out;
        u32 b0[4], b1[4];
        const u32 *kp = ctx->key_enc + 4;
        const int key_len = ctx->key_length;
 
-       b0[0] = le32_to_cpu(src[0]) ^ ctx->key_enc[0];
-       b0[1] = le32_to_cpu(src[1]) ^ ctx->key_enc[1];
-       b0[2] = le32_to_cpu(src[2]) ^ ctx->key_enc[2];
-       b0[3] = le32_to_cpu(src[3]) ^ ctx->key_enc[3];
+       b0[0] = ctx->key_enc[0] ^ get_unaligned_le32(in);
+       b0[1] = ctx->key_enc[1] ^ get_unaligned_le32(in + 4);
+       b0[2] = ctx->key_enc[2] ^ get_unaligned_le32(in + 8);
+       b0[3] = ctx->key_enc[3] ^ get_unaligned_le32(in + 12);
 
        if (key_len > 24) {
                f_nround(b1, b0, kp);
@@ -1361,10 +1364,10 @@ static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
        f_nround(b1, b0, kp);
        f_lround(b0, b1, kp);
 
-       dst[0] = cpu_to_le32(b0[0]);
-       dst[1] = cpu_to_le32(b0[1]);
-       dst[2] = cpu_to_le32(b0[2]);
-       dst[3] = cpu_to_le32(b0[3]);
+       put_unaligned_le32(b0[0], out);
+       put_unaligned_le32(b0[1], out + 4);
+       put_unaligned_le32(b0[2], out + 8);
+       put_unaligned_le32(b0[3], out + 12);
 }
 
 /* decrypt a block of text */
@@ -1401,16 +1404,14 @@ static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
        const struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
-       const __le32 *src = (const __le32 *)in;
-       __le32 *dst = (__le32 *)out;
        u32 b0[4], b1[4];
        const int key_len = ctx->key_length;
        const u32 *kp = ctx->key_dec + 4;
 
-       b0[0] = le32_to_cpu(src[0]) ^  ctx->key_dec[0];
-       b0[1] = le32_to_cpu(src[1]) ^  ctx->key_dec[1];
-       b0[2] = le32_to_cpu(src[2]) ^  ctx->key_dec[2];
-       b0[3] = le32_to_cpu(src[3]) ^  ctx->key_dec[3];
+       b0[0] = ctx->key_dec[0] ^ get_unaligned_le32(in);
+       b0[1] = ctx->key_dec[1] ^ get_unaligned_le32(in + 4);
+       b0[2] = ctx->key_dec[2] ^ get_unaligned_le32(in + 8);
+       b0[3] = ctx->key_dec[3] ^ get_unaligned_le32(in + 12);
 
        if (key_len > 24) {
                i_nround(b1, b0, kp);
@@ -1433,10 +1434,10 @@ static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
        i_nround(b1, b0, kp);
        i_lround(b0, b1, kp);
 
-       dst[0] = cpu_to_le32(b0[0]);
-       dst[1] = cpu_to_le32(b0[1]);
-       dst[2] = cpu_to_le32(b0[2]);
-       dst[3] = cpu_to_le32(b0[3]);
+       put_unaligned_le32(b0[0], out);
+       put_unaligned_le32(b0[1], out + 4);
+       put_unaligned_le32(b0[2], out + 8);
+       put_unaligned_le32(b0[3], out + 12);
 }
 
 static struct crypto_alg aes_alg = {
@@ -1446,7 +1447,6 @@ static struct crypto_alg aes_alg = {
        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
        .cra_blocksize          =       AES_BLOCK_SIZE,
        .cra_ctxsize            =       sizeof(struct crypto_aes_ctx),
-       .cra_alignmask          =       3,
        .cra_module             =       THIS_MODULE,
        .cra_u                  =       {
                .cipher = {