diff options
Diffstat (limited to 'crypto/cast5.c')
| -rw-r--r-- | crypto/cast5.c | 46 |
1 files changed, 19 insertions, 27 deletions
diff --git a/crypto/cast5.c b/crypto/cast5.c index bc42f42..282641c 100644 --- a/crypto/cast5.c +++ b/crypto/cast5.c @@ -21,11 +21,13 @@ */ +#include <asm/byteorder.h> #include <linux/init.h> #include <linux/crypto.h> #include <linux/module.h> #include <linux/errno.h> #include <linux/string.h> +#include <linux/types.h> #define CAST5_BLOCK_SIZE 8 #define CAST5_MIN_KEY_SIZE 5 @@ -578,6 +580,8 @@ static const u32 sb8[256] = { static void cast5_encrypt(void *ctx, u8 * outbuf, const u8 * inbuf) { struct cast5_ctx *c = (struct cast5_ctx *) ctx; + const __be32 *src = (const __be32 *)inbuf; + __be32 *dst = (__be32 *)outbuf; u32 l, r, t; u32 I; /* used by the Fx macros */ u32 *Km; @@ -589,8 +593,8 @@ static void cast5_encrypt(void *ctx, u8 * outbuf, const u8 * inbuf) /* (L0,R0) <-- (m1...m64). (Split the plaintext into left and * right 32-bit halves L0 = m1...m32 and R0 = m33...m64.) */ - l = inbuf[0] << 24 | inbuf[1] << 16 | inbuf[2] << 8 | inbuf[3]; - r = inbuf[4] << 24 | inbuf[5] << 16 | inbuf[6] << 8 | inbuf[7]; + l = be32_to_cpu(src[0]); + r = be32_to_cpu(src[1]); /* (16 rounds) for i from 1 to 16, compute Li and Ri as follows: * Li = Ri-1; @@ -634,19 +638,15 @@ static void cast5_encrypt(void *ctx, u8 * outbuf, const u8 * inbuf) /* c1...c64 <-- (R16,L16). (Exchange final blocks L16, R16 and * concatenate to form the ciphertext.) */ - outbuf[0] = (r >> 24) & 0xff; - outbuf[1] = (r >> 16) & 0xff; - outbuf[2] = (r >> 8) & 0xff; - outbuf[3] = r & 0xff; - outbuf[4] = (l >> 24) & 0xff; - outbuf[5] = (l >> 16) & 0xff; - outbuf[6] = (l >> 8) & 0xff; - outbuf[7] = l & 0xff; + dst[0] = cpu_to_be32(r); + dst[1] = cpu_to_be32(l); } static void cast5_decrypt(void *ctx, u8 * outbuf, const u8 * inbuf) { struct cast5_ctx *c = (struct cast5_ctx *) ctx; + const __be32 *src = (const __be32 *)inbuf; + __be32 *dst = (__be32 *)outbuf; u32 l, r, t; u32 I; u32 *Km; @@ -655,8 +655,8 @@ static void cast5_decrypt(void *ctx, u8 * outbuf, const u8 * inbuf) Km = c->Km; Kr = c->Kr; - l = inbuf[0] << 24 | inbuf[1] << 16 | inbuf[2] << 8 | inbuf[3]; - r = inbuf[4] << 24 | inbuf[5] << 16 | inbuf[6] << 8 | inbuf[7]; + l = be32_to_cpu(src[0]); + r = be32_to_cpu(src[1]); if (!(c->rr)) { t = l; l = r; r = t ^ F1(r, Km[15], Kr[15]); @@ -690,14 +690,8 @@ static void cast5_decrypt(void *ctx, u8 * outbuf, const u8 * inbuf) t = l; l = r; r = t ^ F1(r, Km[0], Kr[0]); } - outbuf[0] = (r >> 24) & 0xff; - outbuf[1] = (r >> 16) & 0xff; - outbuf[2] = (r >> 8) & 0xff; - outbuf[3] = r & 0xff; - outbuf[4] = (l >> 24) & 0xff; - outbuf[5] = (l >> 16) & 0xff; - outbuf[6] = (l >> 8) & 0xff; - outbuf[7] = l & 0xff; + dst[0] = cpu_to_be32(r); + dst[1] = cpu_to_be32(l); } static void key_schedule(u32 * x, u32 * z, u32 * k) @@ -782,7 +776,7 @@ cast5_setkey(void *ctx, const u8 * key, unsigned key_len, u32 * flags) u32 x[4]; u32 z[4]; u32 k[16]; - u8 p_key[16]; + __be32 p_key[4]; struct cast5_ctx *c = (struct cast5_ctx *) ctx; if (key_len < 5 || key_len > 16) { @@ -796,12 +790,10 @@ cast5_setkey(void *ctx, const u8 * key, unsigned key_len, u32 * flags) memcpy(p_key, key, key_len); - x[0] = p_key[0] << 24 | p_key[1] << 16 | p_key[2] << 8 | p_key[3]; - x[1] = p_key[4] << 24 | p_key[5] << 16 | p_key[6] << 8 | p_key[7]; - x[2] = - p_key[8] << 24 | p_key[9] << 16 | p_key[10] << 8 | p_key[11]; - x[3] = - p_key[12] << 24 | p_key[13] << 16 | p_key[14] << 8 | p_key[15]; + x[0] = be32_to_cpu(p_key[0]); + x[1] = be32_to_cpu(p_key[1]); + x[2] = be32_to_cpu(p_key[2]); + x[3] = be32_to_cpu(p_key[3]); key_schedule(x, z, k); for (i = 0; i < 16; i++) |
