diff options
Diffstat (limited to '')
-rw-r--r-- | crypto/blowfish_common.c (renamed from crypto/blowfish.c) | 98 |
1 files changed, 9 insertions, 89 deletions
diff --git a/crypto/blowfish.c b/crypto/blowfish_common.c index a67d52ee..f636aab0 100644 --- a/crypto/blowfish.c +++ b/crypto/blowfish_common.c @@ -1,6 +1,9 @@ /* * Cryptographic API. * + * Common Blowfish algorithm parts shared between the c and assembler + * implementations. + * * Blowfish Cipher Algorithm, by Bruce Schneier. * http://www.counterpane.com/blowfish.html * @@ -22,15 +25,7 @@ #include <asm/byteorder.h> #include <linux/crypto.h> #include <linux/types.h> - -#define BF_BLOCK_SIZE 8 -#define BF_MIN_KEY_SIZE 4 -#define BF_MAX_KEY_SIZE 56 - -struct bf_ctx { - u32 p[18]; - u32 s[1024]; -}; +#include <crypto/blowfish.h> static const u32 bf_pbox[16 + 2] = { 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, @@ -309,9 +304,9 @@ static const u32 bf_sbox[256 * 4] = { #define GET32_0(x) (((x) >> (24)) & (0xff)) #define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \ - S[512 + GET32_2(x)]) + S[768 + GET32_3(x)]) + S[512 + GET32_2(x)]) + S[768 + GET32_3(x)]) -#define ROUND(a, b, n) b ^= P[n]; a ^= bf_F (b) +#define ROUND(a, b, n) ({ b ^= P[n]; a ^= bf_F(b); }) /* * The blowfish encipher, processes 64-bit blocks. @@ -348,57 +343,10 @@ static void encrypt_block(struct bf_ctx *bctx, u32 *dst, u32 *src) dst[1] = yl; } -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; - u32 in32[2], out32[2]; - - in32[0] = be32_to_cpu(in_blk[0]); - in32[1] = be32_to_cpu(in_blk[1]); - 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(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 = ctx->p; - const u32 *S = ctx->s; - u32 yl = be32_to_cpu(in_blk[0]); - u32 yr = be32_to_cpu(in_blk[1]); - - ROUND(yr, yl, 17); - ROUND(yl, yr, 16); - ROUND(yr, yl, 15); - ROUND(yl, yr, 14); - ROUND(yr, yl, 13); - ROUND(yl, yr, 12); - ROUND(yr, yl, 11); - ROUND(yl, yr, 10); - ROUND(yr, yl, 9); - ROUND(yl, yr, 8); - ROUND(yr, yl, 7); - ROUND(yl, yr, 6); - ROUND(yr, yl, 5); - ROUND(yl, yr, 4); - ROUND(yr, yl, 3); - ROUND(yl, yr, 2); - - yl ^= P[1]; - yr ^= P[0]; - - out_blk[0] = cpu_to_be32(yr); - out_blk[1] = cpu_to_be32(yl); -} - /* * Calculates the blowfish S and P boxes for encryption and decryption. */ -static int bf_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) +int blowfish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) { struct bf_ctx *ctx = crypto_tfm_ctx(tfm); u32 *P = ctx->p; @@ -448,35 +396,7 @@ static int bf_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) /* Bruce says not to bother with the weak key check. */ return 0; } - -static struct crypto_alg alg = { - .cra_name = "blowfish", - .cra_flags = CRYPTO_ALG_TYPE_CIPHER, - .cra_blocksize = BF_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct bf_ctx), - .cra_alignmask = 3, - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(alg.cra_list), - .cra_u = { .cipher = { - .cia_min_keysize = BF_MIN_KEY_SIZE, - .cia_max_keysize = BF_MAX_KEY_SIZE, - .cia_setkey = bf_setkey, - .cia_encrypt = bf_encrypt, - .cia_decrypt = bf_decrypt } } -}; - -static int __init blowfish_mod_init(void) -{ - return crypto_register_alg(&alg); -} - -static void __exit blowfish_mod_fini(void) -{ - crypto_unregister_alg(&alg); -} - -module_init(blowfish_mod_init); -module_exit(blowfish_mod_fini); +EXPORT_SYMBOL_GPL(blowfish_setkey); MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Blowfish Cipher Algorithm"); +MODULE_DESCRIPTION("Blowfish Cipher common functions"); |