diff options
Diffstat (limited to 'crypto/anubis.c')
| -rw-r--r-- | crypto/anubis.c | 87 |
1 files changed, 37 insertions, 50 deletions
diff --git a/crypto/anubis.c b/crypto/anubis.c index 3925eb0133c..008c8a4fb67 100644 --- a/crypto/anubis.c +++ b/crypto/anubis.c @@ -32,8 +32,9 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/mm.h> -#include <asm/scatterlist.h> +#include <asm/byteorder.h> #include <linux/crypto.h> +#include <linux/types.h> #define ANUBIS_MIN_KEY_SIZE 16 #define ANUBIS_MAX_KEY_SIZE 40 @@ -458,24 +459,23 @@ static const u32 rc[] = { 0xf726ffedU, 0xe89d6f8eU, 0x19a0f089U, }; -static int anubis_setkey(void *ctx_arg, const u8 *in_key, - unsigned int key_len, u32 *flags) +static int anubis_setkey(struct crypto_tfm *tfm, const u8 *in_key, + unsigned int key_len) { - - int N, R, i, pos, r; + struct anubis_ctx *ctx = crypto_tfm_ctx(tfm); + const __be32 *key = (const __be32 *)in_key; + u32 *flags = &tfm->crt_flags; + int N, R, i, r; u32 kappa[ANUBIS_MAX_N]; u32 inter[ANUBIS_MAX_N]; - struct anubis_ctx *ctx = ctx_arg; - - switch (key_len) - { + switch (key_len) { case 16: case 20: case 24: case 28: case 32: case 36: case 40: break; default: *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; - return - EINVAL; + return -EINVAL; } ctx->key_len = key_len * 8; @@ -483,13 +483,8 @@ static int anubis_setkey(void *ctx_arg, const u8 *in_key, ctx->R = R = 8 + N; /* * map cipher key to initial key state (mu): */ - for (i = 0, pos = 0; i < N; i++, pos += 4) { - kappa[i] = - (in_key[pos ] << 24) ^ - (in_key[pos + 1] << 16) ^ - (in_key[pos + 2] << 8) ^ - (in_key[pos + 3] ); - } + for (i = 0; i < N; i++) + kappa[i] = be32_to_cpu(key[i]); /* * generate R + 1 round keys: @@ -534,23 +529,24 @@ static int anubis_setkey(void *ctx_arg, const u8 *in_key, /* * compute kappa^{r+1} from kappa^r: */ - if (r == R) { + if (r == R) break; - } for (i = 0; i < N; i++) { int j = i; inter[i] = T0[(kappa[j--] >> 24) ]; - if (j < 0) j = N - 1; + if (j < 0) + j = N - 1; inter[i] ^= T1[(kappa[j--] >> 16) & 0xff]; - if (j < 0) j = N - 1; + if (j < 0) + j = N - 1; inter[i] ^= T2[(kappa[j--] >> 8) & 0xff]; - if (j < 0) j = N - 1; + if (j < 0) + j = N - 1; inter[i] ^= T3[(kappa[j ] ) & 0xff]; } kappa[0] = inter[0] ^ rc[r]; - for (i = 1; i < N; i++) { + for (i = 1; i < N; i++) kappa[i] = inter[i]; - } } /* @@ -578,7 +574,9 @@ static int anubis_setkey(void *ctx_arg, const u8 *in_key, static void anubis_crypt(u32 roundKey[ANUBIS_MAX_ROUNDS + 1][4], u8 *ciphertext, const u8 *plaintext, const int R) { - int i, pos, r; + const __be32 *src = (const __be32 *)plaintext; + __be32 *dst = (__be32 *)ciphertext; + int i, r; u32 state[4]; u32 inter[4]; @@ -586,14 +584,8 @@ static void anubis_crypt(u32 roundKey[ANUBIS_MAX_ROUNDS + 1][4], * map plaintext block to cipher state (mu) * and add initial round key (sigma[K^0]): */ - for (i = 0, pos = 0; i < 4; i++, pos += 4) { - state[i] = - (plaintext[pos ] << 24) ^ - (plaintext[pos + 1] << 16) ^ - (plaintext[pos + 2] << 8) ^ - (plaintext[pos + 3] ) ^ - roundKey[0][i]; - } + for (i = 0; i < 4; i++) + state[i] = be32_to_cpu(src[i]) ^ roundKey[0][i]; /* * R - 1 full rounds: @@ -663,24 +655,19 @@ static void anubis_crypt(u32 roundKey[ANUBIS_MAX_ROUNDS + 1][4], * map cipher state to ciphertext block (mu^{-1}): */ - for (i = 0, pos = 0; i < 4; i++, pos += 4) { - u32 w = inter[i]; - ciphertext[pos ] = (u8)(w >> 24); - ciphertext[pos + 1] = (u8)(w >> 16); - ciphertext[pos + 2] = (u8)(w >> 8); - ciphertext[pos + 3] = (u8)(w ); - } + for (i = 0; i < 4; i++) + dst[i] = cpu_to_be32(inter[i]); } -static void anubis_encrypt(void *ctx_arg, u8 *dst, const u8 *src) +static void anubis_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { - struct anubis_ctx *ctx = ctx_arg; + struct anubis_ctx *ctx = crypto_tfm_ctx(tfm); anubis_crypt(ctx->E, dst, src, ctx->R); } -static void anubis_decrypt(void *ctx_arg, u8 *dst, const u8 *src) +static void anubis_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { - struct anubis_ctx *ctx = ctx_arg; + struct anubis_ctx *ctx = crypto_tfm_ctx(tfm); anubis_crypt(ctx->D, dst, src, ctx->R); } @@ -689,8 +676,8 @@ static struct crypto_alg anubis_alg = { .cra_flags = CRYPTO_ALG_TYPE_CIPHER, .cra_blocksize = ANUBIS_BLOCK_SIZE, .cra_ctxsize = sizeof (struct anubis_ctx), + .cra_alignmask = 3, .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(anubis_alg.cra_list), .cra_u = { .cipher = { .cia_min_keysize = ANUBIS_MIN_KEY_SIZE, .cia_max_keysize = ANUBIS_MAX_KEY_SIZE, @@ -699,21 +686,21 @@ static struct crypto_alg anubis_alg = { .cia_decrypt = anubis_decrypt } } }; -static int __init init(void) +static int __init anubis_mod_init(void) { int ret = 0; - + ret = crypto_register_alg(&anubis_alg); return ret; } -static void __exit fini(void) +static void __exit anubis_mod_fini(void) { crypto_unregister_alg(&anubis_alg); } -module_init(init); -module_exit(fini); +module_init(anubis_mod_init); +module_exit(anubis_mod_fini); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Anubis Cryptographic Algorithm"); |