Encrypt or decrypt with a 128-bit block cipher in CTR mode.
Declared in <openssl/modes.h>
void
CRYPTO_ctr128_encrypt(
unsigned char const* in,
unsigned char* out,
size_t len,
void const* key,
unsigned char ivec[],
unsigned char ecount_buf[],
unsigned int* num,
block128_f block);| Name | Description |
|---|---|
| in | Input bytes of length len. |
| out | Output buffer of length len (may equal in). |
| len | Number of bytes to process. |
| key | Cipher-specific expanded key for block. |
| ivec | 16-byte counter block updated as encryption proceeds. |
| ecount_buf | 16-byte buffer holding the current encrypted counter block. |
| num | Offset into ecount_buf for residual keystream (updated; start at 0). |
| block | Block-encrypt function for the underlying cipher. |