-/*
+/*
* Cryptographic API.
*
* Blowfish Cipher Algorithm, by Bruce Schneier.
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/byteorder.h>
-#include <asm/scatterlist.h>
#include <linux/crypto.h>
#include <linux/types.h>
0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
};
-/*
+/*
* Round loop unrolling macros, S is a pointer to a S-Box array
* organized in 4 unsigned longs at a row.
*/
/*
* The blowfish encipher, processes 64-bit blocks.
- * NOTE: This function MUSTN'T respect endianess
+ * NOTE: This function MUSTN'T respect endianess
*/
static void encrypt_block(struct bf_ctx *bctx, u32 *dst, u32 *src)
{
dst[1] = yl;
}
-static void bf_encrypt(void *ctx, u8 *dst, const u8 *src)
+static void bf_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
const __be32 *in_blk = (const __be32 *)src;
__be32 *const out_blk = (__be32 *)dst;
in32[0] = be32_to_cpu(in_blk[0]);
in32[1] = be32_to_cpu(in_blk[1]);
- encrypt_block(ctx, out32, in32);
+ encrypt_block(crypto_tfm_ctx(tfm), out32, in32);
out_blk[0] = cpu_to_be32(out32[0]);
out_blk[1] = cpu_to_be32(out32[1]);
}
-static void bf_decrypt(void *ctx, u8 *dst, const u8 *src)
+static void bf_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
+ struct bf_ctx *ctx = crypto_tfm_ctx(tfm);
const __be32 *in_blk = (const __be32 *)src;
__be32 *const out_blk = (__be32 *)dst;
- const u32 *P = ((struct bf_ctx *)ctx)->p;
- const u32 *S = ((struct bf_ctx *)ctx)->s;
+ const u32 *P = ctx->p;
+ const u32 *S = ctx->s;
u32 yl = be32_to_cpu(in_blk[0]);
u32 yr = be32_to_cpu(in_blk[1]);
out_blk[1] = cpu_to_be32(yl);
}
-/*
+/*
* Calculates the blowfish S and P boxes for encryption and decryption.
*/
-static int bf_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
+static int bf_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
{
+ struct bf_ctx *ctx = crypto_tfm_ctx(tfm);
+ u32 *P = ctx->p;
+ u32 *S = ctx->s;
short i, j, count;
u32 data[2], temp;
- u32 *P = ((struct bf_ctx *)ctx)->p;
- u32 *S = ((struct bf_ctx *)ctx)->s;
/* Copy the initialization s-boxes */
for (i = 0, count = 0; i < 256; i++)
/* Actual subkey generation */
for (j = 0, i = 0; i < 16 + 2; i++) {
- temp = (((u32 )key[j] << 24) |
- ((u32 )key[(j + 1) % keylen] << 16) |
- ((u32 )key[(j + 2) % keylen] << 8) |
- ((u32 )key[(j + 3) % keylen]));
+ temp = (((u32)key[j] << 24) |
+ ((u32)key[(j + 1) % keylen] << 16) |
+ ((u32)key[(j + 2) % keylen] << 8) |
+ ((u32)key[(j + 3) % keylen]));
P[i] = P[i] ^ temp;
j = (j + 4) % keylen;
S[count + 1] = data[1];
}
}
-
+
/* Bruce says not to bother with the weak key check. */
return 0;
}
.cia_decrypt = bf_decrypt } }
};
-static int __init init(void)
+static int __init blowfish_mod_init(void)
{
return crypto_register_alg(&alg);
}
-static void __exit fini(void)
+static void __exit blowfish_mod_fini(void)
{
crypto_unregister_alg(&alg);
}
-module_init(init);
-module_exit(fini);
+module_init(blowfish_mod_init);
+module_exit(blowfish_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Blowfish Cipher Algorithm");