scrypt-1.2.1/libcperciva/crypto/crypto_aesctr.h

   1 #ifndef _CRYPTO_AESCTR_H_
   2 #define _CRYPTO_AESCTR_H_
   3
   4 #include <stddef.h>
   5 #include <stdint.h>
   6
   7 /* Opaque types. */
   8 struct crypto_aes_key;
   9 struct crypto_aesctr;
  10
  11 /**
  12  * crypto_aesctr_init(key, nonce):
  13  * Prepare to encrypt/decrypt data with AES in CTR mode, using the provided
  14  * expanded key and nonce.  The key provided must remain valid for the
  15  * lifetime of the stream.
  16  */
  17 struct crypto_aesctr * crypto_aesctr_init(const struct crypto_aes_key *,
  18     uint64_t);
  19
  20 /**
  21  * crypto_aesctr_stream(stream, inbuf, outbuf, buflen):
  22  * Generate the next ${buflen} bytes of the AES-CTR stream and xor them with
  23  * bytes from ${inbuf}, writing the result into ${outbuf}.  If the buffers
  24  * ${inbuf} and ${outbuf} overlap, they must be identical.
  25  */
  26 void crypto_aesctr_stream(struct crypto_aesctr *, const uint8_t *,
  27     uint8_t *, size_t);
  28
  29 /**
  30  * crypto_aesctr_free(stream):
  31  * Free the provided stream object.
  32  */
  33 void crypto_aesctr_free(struct crypto_aesctr *);
  34
  35 /**
  36  * crypto_aesctr_buf(key, nonce, inbuf, outbuf, buflen):
  37  * Equivalent to _init(key, nonce); _stream(inbuf, outbuf, buflen); _free().
  38  */
  39 void crypto_aesctr_buf(const struct crypto_aes_key *, uint64_t,
  40     const uint8_t *, uint8_t *, size_t);
  41
  42 #endif /* !_CRYPTO_AESCTR_H_ */