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Differential D33529 Diff 100248 sys/opencrypto/xform_cml.c

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sys/opencrypto/xform_cml.c

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struct camellia_cbc_ctx { struct camellia_cbc_ctx {
camellia_ctx state; camellia_ctx state;
char iv[CAMELLIA_BLOCK_LEN]; char iv[CAMELLIA_BLOCK_LEN];
}; };
static int cml_setkey(void *, const uint8_t *, int); static int cml_setkey(void *, const uint8_t *, int);
static void cml_encrypt(void *, const uint8_t *, uint8_t *); static void cml_encrypt(void *, const uint8_t *, uint8_t *);
static void cml_decrypt(void *, const uint8_t *, uint8_t *); static void cml_decrypt(void *, const uint8_t *, uint8_t *);
static void cml_encrypt_multi(void *, const uint8_t *, uint8_t *, size_t);
static void cml_decrypt_multi(void *, const uint8_t *, uint8_t *, size_t);
static void cml_reinit(void *, const uint8_t *, size_t); static void cml_reinit(void *, const uint8_t *, size_t);
/* Encryption instances */ /* Encryption instances */
const struct enc_xform enc_xform_camellia = { const struct enc_xform enc_xform_camellia = {
.type = CRYPTO_CAMELLIA_CBC, .type = CRYPTO_CAMELLIA_CBC,
.name = "Camellia-CBC", .name = "Camellia-CBC",
.ctxsize = sizeof(struct camellia_cbc_ctx), .ctxsize = sizeof(struct camellia_cbc_ctx),
.blocksize = CAMELLIA_BLOCK_LEN, .blocksize = CAMELLIA_BLOCK_LEN,
.ivsize = CAMELLIA_BLOCK_LEN, .ivsize = CAMELLIA_BLOCK_LEN,
.minkey = CAMELLIA_MIN_KEY, .minkey = CAMELLIA_MIN_KEY,
.maxkey = CAMELLIA_MAX_KEY, .maxkey = CAMELLIA_MAX_KEY,
.encrypt = cml_encrypt,
.decrypt = cml_decrypt,
.setkey = cml_setkey, .setkey = cml_setkey,
.reinit = cml_reinit, .reinit = cml_reinit,
.encrypt = cml_encrypt,
.decrypt = cml_decrypt,
.encrypt_multi = cml_encrypt_multi,
.decrypt_multi = cml_decrypt_multi,
}; };
/* /*
* Encryption wrapper routines. * Encryption wrapper routines.
*/ */
static void static void
cml_encrypt(void *vctx, const uint8_t *in, uint8_t *out) cml_encrypt(void *vctx, const uint8_t *in, uint8_t *out)
{ {
Show All 11 Linescml_decrypt(void *vctx, const uint8_t *in, uint8_t *out)
struct camellia_cbc_ctx *ctx = vctx; struct camellia_cbc_ctx *ctx = vctx;
char block[CAMELLIA_BLOCK_LEN]; char block[CAMELLIA_BLOCK_LEN];
memcpy(block, in, CAMELLIA_BLOCK_LEN); memcpy(block, in, CAMELLIA_BLOCK_LEN);
camellia_decrypt(&ctx->state, in, out); camellia_decrypt(&ctx->state, in, out);
for (u_int i = 0; i < CAMELLIA_BLOCK_LEN; i++) for (u_int i = 0; i < CAMELLIA_BLOCK_LEN; i++)
out[i] ^= ctx->iv[i]; out[i] ^= ctx->iv[i];
memcpy(ctx->iv, block, CAMELLIA_BLOCK_LEN); memcpy(ctx->iv, block, CAMELLIA_BLOCK_LEN);
explicit_bzero(block, sizeof(block));
}
static void
cml_encrypt_multi(void *vctx, const uint8_t *in, uint8_t *out, size_t len)
{
struct camellia_cbc_ctx *ctx = vctx;
KASSERT(len % CAMELLIA_BLOCK_LEN == 0, ("%s: invalid length",
__func__));
while (len > 0) {
for (u_int i = 0; i < CAMELLIA_BLOCK_LEN; i++)
out[i] = in[i] ^ ctx->iv[i];
camellia_encrypt(&ctx->state, out, out);
memcpy(ctx->iv, out, CAMELLIA_BLOCK_LEN);
out += CAMELLIA_BLOCK_LEN;
in += CAMELLIA_BLOCK_LEN;
len -= CAMELLIA_BLOCK_LEN;
}
}
static void
cml_decrypt_multi(void *vctx, const uint8_t *in, uint8_t *out, size_t len)
{
struct camellia_cbc_ctx *ctx = vctx;
char block[CAMELLIA_BLOCK_LEN];
KASSERT(len % CAMELLIA_BLOCK_LEN == 0, ("%s: invalid length",
__func__));
while (len > 0) {
memcpy(block, in, CAMELLIA_BLOCK_LEN);
camellia_decrypt(&ctx->state, in, out);
for (u_int i = 0; i < CAMELLIA_BLOCK_LEN; i++)
out[i] ^= ctx->iv[i];
memcpy(ctx->iv, block, CAMELLIA_BLOCK_LEN);
out += CAMELLIA_BLOCK_LEN;
in += CAMELLIA_BLOCK_LEN;
len -= CAMELLIA_BLOCK_LEN;
}
explicit_bzero(block, sizeof(block)); explicit_bzero(block, sizeof(block));
} }
static int static int
cml_setkey(void *vctx, const uint8_t *key, int len) cml_setkey(void *vctx, const uint8_t *key, int len)
{ {
struct camellia_cbc_ctx *ctx = vctx; struct camellia_cbc_ctx *ctx = vctx;
Show All 15 Lines