static int camellia_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) {
int num = EVP_CIPHER_CTX_num(ctx);
CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks,
EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
EVP_CIPHER_CTX_set_num(ctx, num);
return 1;
}
while (len >= MAXBITCHUNK) {
int num = EVP_CIPHER_CTX_num(ctx);
CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks,
EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
len -= MAXBITCHUNK;
EVP_CIPHER_CTX_set_num(ctx, num);
}
if (len) {
int num = EVP_CIPHER_CTX_num(ctx);
CRYPTO_cfb128_1_encrypt(in, out, len * 8, &dat->ks,
EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
EVP_CIPHER_CTX_set_num(ctx, num);
}
return 1;
}
static int
padlock_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
const unsigned char *in_arg, size_t nbytes)
{
struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
size_t chunk;
/*
* ctx->num is maintained in byte-oriented modes, such as CFB and OFB...
*/
if ((chunk = EVP_CIPHER_CTX_num(ctx))) { /* borrow chunk variable */
unsigned char *ivp = EVP_CIPHER_CTX_iv_noconst(ctx);
if (chunk >= AES_BLOCK_SIZE)
return 0; /* bogus value */
while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
*(out_arg++) = *(in_arg++) ^ ivp[chunk];
chunk++, nbytes--;
}
EVP_CIPHER_CTX_set_num(ctx, chunk % AES_BLOCK_SIZE);
}
if (nbytes == 0)
return 1;
memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
if (!padlock_ofb_encrypt(out_arg, in_arg, cdata, chunk))
return 0;
nbytes -= chunk;
}
if (nbytes) {
unsigned char *ivp = cdata->iv;
out_arg += chunk;
in_arg += chunk;
EVP_CIPHER_CTX_set_num(ctx, nbytes);
padlock_reload_key(); /* empirically found */
padlock_aes_block(ivp, ivp, cdata);
padlock_reload_key(); /* empirically found */
while (nbytes) {
*(out_arg++) = *(in_arg++) ^ *ivp;
ivp++, nbytes--;
}
}
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
return 1;
}
static int camellia_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
int num = EVP_CIPHER_CTX_num(ctx);
CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks,
EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
EVP_CIPHER_CTX_set_num(ctx, num);
return 1;
}
static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
unsigned int num = EVP_CIPHER_CTX_num(ctx);
EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY,ctx);
CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_buf_noconst(ctx), &num,
(block128_f) aria_encrypt);
EVP_CIPHER_CTX_set_num(ctx, num);
return 1;
}
static int sms4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
unsigned int num = EVP_CIPHER_CTX_num(ctx);
EVP_SMS4_KEY *sms4 = (EVP_SMS4_KEY *)ctx->cipher_data;
CRYPTO_ctr128_encrypt(in, out, len, &sms4->ks,
EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_buf_noconst(ctx), &num,
sms4->block);
EVP_CIPHER_CTX_set_num(ctx, num);
return 1;
}
static int
padlock_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
const unsigned char *in_arg, size_t nbytes)
{
struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
unsigned int num = EVP_CIPHER_CTX_num(ctx);
CRYPTO_ctr128_encrypt_ctr32(in_arg, out_arg, nbytes,
cdata, EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_buf_noconst(ctx), &num,
(ctr128_f) padlock_ctr32_encrypt_glue);
EVP_CIPHER_CTX_set_num(ctx, (size_t)num);
return 1;
}
static int camellia_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
unsigned int num = EVP_CIPHER_CTX_num(ctx);
EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
if (dat->stream.ctr)
CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks,
EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_buf_noconst(ctx), &num,
dat->stream.ctr);
else
CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_buf_noconst(ctx), &num,
dat->block);
EVP_CIPHER_CTX_set_num(ctx, num);
return 1;
}
static int zuc_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
EVP_ZUC_KEY *dctx = EVP_C_DATA(EVP_ZUC_KEY, ctx);
unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
unsigned int n = EVP_CIPHER_CTX_num(ctx);
size_t l = 0;
while (l < len) {
if (n == 0) {
ZUC_generate_keystream(&dctx->ks, 4, (uint32_t *)buf);
}
out[l] = in[l] ^ buf[n];
++l;
n = (n + 1) % 16;
}
EVP_CIPHER_CTX_set_num(ctx, n);
return 1;
}
static int
padlock_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
const unsigned char *in_arg, size_t nbytes)
{
struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
size_t chunk;
if ((chunk = EVP_CIPHER_CTX_num(ctx))) { /* borrow chunk variable */
unsigned char *ivp = EVP_CIPHER_CTX_iv_noconst(ctx);
if (chunk >= AES_BLOCK_SIZE)
return 0; /* bogus value */
if (EVP_CIPHER_CTX_encrypting(ctx))
while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
ivp[chunk] = *(out_arg++) = *(in_arg++) ^ ivp[chunk];
chunk++, nbytes--;
} else
while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
unsigned char c = *(in_arg++);
*(out_arg++) = c ^ ivp[chunk];
ivp[chunk++] = c, nbytes--;
}
EVP_CIPHER_CTX_set_num(ctx, chunk % AES_BLOCK_SIZE);
}
if (nbytes == 0)
return 1;
memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
if (!padlock_cfb_encrypt(out_arg, in_arg, cdata, chunk))
return 0;
nbytes -= chunk;
}
if (nbytes) {
unsigned char *ivp = cdata->iv;
out_arg += chunk;
in_arg += chunk;
EVP_CIPHER_CTX_set_num(ctx, nbytes);
if (cdata->cword.b.encdec) {
cdata->cword.b.encdec = 0;
padlock_reload_key();
padlock_aes_block(ivp, ivp, cdata);
cdata->cword.b.encdec = 1;
padlock_reload_key();
while (nbytes) {
unsigned char c = *(in_arg++);
*(out_arg++) = c ^ *ivp;
*(ivp++) = c, nbytes--;
}
} else {
padlock_reload_key();
padlock_aes_block(ivp, ivp, cdata);
padlock_reload_key();
while (nbytes) {
*ivp = *(out_arg++) = *(in_arg++) ^ *ivp;
ivp++, nbytes--;
}
}
}
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
return 1;
}