//
// Flatten the valid iolist to the buffer of
// appropriate size pointed to by ptr
//
uint8_t *iolist_flatten(term_t l, uint8_t *ptr)
{
if (is_nil(l))
return ptr;
if (is_cons(l))
{
do {
uint32_t *term_data = peel_cons(l);
term_t e = term_data[0];
if (is_int(e))
*ptr++ = int_value(e);
else
{
assert(is_list(e) || (is_boxed(e) && is_binary(peel_boxed(e))));
ptr = iolist_flatten(e, ptr);
}
l = term_data[1];
if (is_boxed(l) && is_binary(peel_boxed(l)))
return iolist_flatten(l, ptr);
} while (is_cons(l));
assert(is_nil(l));
}
else // is_binary()
{
bits_t bs, to;
bits_get_real(peel_boxed(l), &bs);
bits_init_buf(ptr, (bs.ends +7) /8, &to);
ptr += (bs.ends - bs.starts) /8;
bits_copy(&bs, &to);
assert(bs.starts == bs.ends);
}
return ptr;
}
term_t cbif_exor2(proc_t *proc, term_t *regs)
{
term_t Bin1 = regs[0];
term_t Bin2 = regs[1];
if (!is_list(Bin1) && !is_boxed_binary(Bin1))
badarg(Bin1);
if (!is_list(Bin2) && !is_boxed_binary(Bin2))
badarg(Bin2);
int sz1 = iolist_size(Bin1);
if (sz1 < 0)
badarg(Bin1);
int sz2 = iolist_size(Bin2);
if (sz2 != sz1)
badarg(Bin2);
assert(sz1 <= 65536); //TODO: use heap_tmp_buf for larger binaries
uint8_t data1[sz1];
iolist_flatten(Bin1, data1);
uint8_t data2[sz2];
iolist_flatten(Bin2, data2);
uint8_t *data3;
term_t result = heap_make_bin(&proc->hp, sz1, &data3);
for (int i = 0; i < sz1; i++)
data3[i] = data1[i] ^ data2[i];
return result;
}
term_t cbif_aes_cbc_crypt4(proc_t *proc, term_t *regs)
{
term_t Key = regs[0];
term_t IVec = regs[1];
term_t Data = regs[2];
term_t Dir = regs[3];
if (!is_list(Key) && !is_boxed_binary(Key))
badarg(Key);
if (!is_boxed_binary(IVec))
badarg(IVec);
if (!is_list(Data) && !is_boxed_binary(Data))
badarg(Data);
if (!is_bool(Dir))
badarg(Dir);
int key_size = iolist_size(Key);
if (key_size < AES_MIN_KEY_SIZE || key_size > AES_MAX_KEY_SIZE)
badarg(Key);
uint8_t key_buf[key_size];
iolist_flatten(Key, key_buf);
bits_t src, dst;
bits_get_real(peel_boxed(IVec), &src);
if (src.ends -src.starts != AES_BLOCK_SIZE *8)
badarg(IVec);
uint8_t ivec_buf[AES_BLOCK_SIZE];
bits_init_buf(ivec_buf, AES_BLOCK_SIZE, &dst);
bits_copy(&src, &dst);
int data_size = iolist_size(Data);
if (data_size < 0)
badarg(Data);
assert(data_size <= 65536); //TODO: use heap_tmp_buf for larger Data
uint8_t data_buf[data_size];
iolist_flatten(Data, data_buf);
struct CBC_CTX(struct aes_ctx, AES_BLOCK_SIZE) ctx;
if (Dir == A_TRUE)
aes_set_encrypt_key((struct aes_ctx *)&ctx, key_size, key_buf);
else
aes_set_decrypt_key((struct aes_ctx *)&ctx, key_size, key_buf);
CBC_SET_IV(&ctx, ivec_buf);
uint8_t *ptr;
term_t cipher_text = heap_make_bin(&proc->hp, data_size, &ptr);
if (Dir == A_TRUE)
CBC_ENCRYPT(&ctx, aes_encrypt, data_size, ptr, data_buf);
else
CBC_DECRYPT(&ctx, aes_decrypt, data_size, ptr, data_buf);
return cipher_text;
}
term_t cbif_sha_update2(proc_t *proc, term_t *regs)
{
term_t Context = regs[0];
term_t Data = regs[1];
if (!is_boxed_binary(Context))
badarg(Context);
bits_t bs, dst;
bits_get_real(peel_boxed(Context), &bs);
if (bs.ends -bs.starts != sizeof(struct sha1_ctx) *8)
badarg(Context);
struct sha1_ctx ctx;
bits_init_buf((uint8_t *)&ctx, sizeof(ctx), &dst);
bits_copy(&bs, &dst);
if (!is_boxed_binary(Data) && !is_list(Data))
badarg(Data);
int sz = iolist_size(Data);
if (sz < 0)
badarg(Data);
assert(sz <= 65536); //TODO: use heap_tmp_buf for larger Data
uint8_t buf[sz];
iolist_flatten(Data, buf);
sha1_update(&ctx, sz, buf);
uint8_t *ptr;
term_t bin = heap_make_bin(&proc->hp, sizeof(ctx), &ptr);
memcpy(ptr, &ctx, sizeof(ctx));
return bin;
}
term_t cbif_sha_mac_n3(proc_t *proc, term_t *regs)
{
term_t Key = regs[0];
term_t Data = regs[1];
term_t Size = regs[2];
if (!is_list(Key) && !is_boxed_binary(Key))
badarg(Key);
if (!is_list(Data) && !is_boxed_binary(Data))
badarg(Data);
if (!is_int(Size))
badarg(Size);
int trunc_size = int_value(Size);
if (trunc_size < 1 || trunc_size > SHA1_DIGEST_SIZE)
badarg(Size);
int key_size = iolist_size(Key);
if (key_size < 0)
badarg(Key);
assert(key_size <= 65536); // TODO: use heap_tmp_buf for a longer Key
uint8_t key_buf[key_size];
iolist_flatten(Key, key_buf);
int data_size = iolist_size(Data);
if (data_size < 0)
badarg(Data);
assert(data_size <= 65536); // TODO: use heap_tmp_buf for larger Data
uint8_t data_buf[data_size];
iolist_flatten(Data, data_buf);
struct hmac_sha1_ctx ctx;
hmac_sha1_set_key(&ctx, key_size, key_buf);
hmac_sha1_update(&ctx, data_size, data_buf);
uint8_t *ptr;
term_t mac = heap_make_bin(&proc->hp, trunc_size, &ptr);
hmac_sha1_digest(&ctx, trunc_size, ptr);
return mac;
}
term_t cbif_sha1(proc_t *proc, term_t *regs)
{
term_t Data = regs[0];
if (!is_boxed_binary(Data) && !is_list(Data))
badarg(Data);
int sz = iolist_size(Data);
if (sz < 0)
badarg(Data);
assert(sz <= 65536); //TODO: use heap_tmp_buf for larger Data
uint8_t buf[sz];
iolist_flatten(Data, buf);
struct sha1_ctx ctx;
sha1_init(&ctx);
sha1_update(&ctx, sz, buf);
uint8_t *ptr;
term_t bin = heap_make_bin(&proc->hp, SHA1_DIGEST_SIZE, &ptr);
sha1_digest(&ctx, SHA1_DIGEST_SIZE, ptr);
return bin;
}
