[CRYPTO] all: Pass tfm instead of ctx to algorithms

Up until now algorithms have been happy to get a context pointer since
they know everything that's in the tfm already (e.g., alignment, block
size).

However, once we have parameterised algorithms, such information will
be specific to each tfm.  So the algorithm API needs to be changed to
pass the tfm structure instead of the context pointer.

This patch is basically a text substitution.  The only tricky bit is
the assembly routines that need to get the context pointer offset
through asm-offsets.h.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/cast5.c

@@ -577,9 +577,9 @@ static const u32 sb8[256] = {
     (((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]) )
 
 
-static void cast5_encrypt(void *ctx, u8 * outbuf, const u8 * inbuf)
+static void cast5_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
 {
-	struct cast5_ctx *c = (struct cast5_ctx *) ctx;
+	struct cast5_ctx *c = crypto_tfm_ctx(tfm);
 	const __be32 *src = (const __be32 *)inbuf;
 	__be32 *dst = (__be32 *)outbuf;
 	u32 l, r, t;
@@ -642,9 +642,9 @@ static void cast5_encrypt(void *ctx, u8 * outbuf, const u8 * inbuf)
 	dst[1] = cpu_to_be32(l);
 }
 
-static void cast5_decrypt(void *ctx, u8 * outbuf, const u8 * inbuf)
+static void cast5_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
 {
-	struct cast5_ctx *c = (struct cast5_ctx *) ctx;
+	struct cast5_ctx *c = crypto_tfm_ctx(tfm);
 	const __be32 *src = (const __be32 *)inbuf;
 	__be32 *dst = (__be32 *)outbuf;
 	u32 l, r, t;
@@ -769,15 +769,15 @@ static void key_schedule(u32 * x, u32 * z, u32 * k)
 }
 
 
-static int
-cast5_setkey(void *ctx, const u8 * key, unsigned key_len, u32 * flags)
+static int cast5_setkey(struct crypto_tfm *tfm, const u8 *key,
+			unsigned key_len, u32 *flags)
 {
+	struct cast5_ctx *c = crypto_tfm_ctx(tfm);
 	int i;
 	u32 x[4];
 	u32 z[4];
 	u32 k[16];
 	__be32 p_key[4];
-	struct cast5_ctx *c = (struct cast5_ctx *) ctx;
 	
 	if (key_len < 5 || key_len > 16) {
 		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;