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Split cipher_update_ad() out or cipher_reset()

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Manuel Pégourié-Gonnard 2013-09-03 13:54:12 +02:00
parent a235b5b5bd
commit 2adc40c346
6 changed files with 59 additions and 15 deletions
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23
include/polarssl/cipher.h
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@ -454,7 +454,7 @@ int cipher_set_iv( cipher_context_t *ctx,
const unsigned char *iv, size_t iv_len );
/**
* \brief Reset the given context, setting the IV to iv
* \brief Finish preparation of the given context
*
* \param ctx generic cipher context
* \param ad Additional data for AEAD ciphers, or discarded.
@ -464,8 +464,25 @@ int cipher_set_iv( cipher_context_t *ctx,
* \returns 0 on success, POLARSSL_ERR_CIPHER_BAD_INPUT_DATA
* if parameter verification fails.
*/
int cipher_reset( cipher_context_t *ctx,
const unsigned char *ad, size_t ad_len );
int cipher_reset( cipher_context_t *ctx );
/**
* \brief Add additional data (for AEAD ciphers).
* This function has no effect for non-AEAD ciphers.
* For AEAD ciphers, it may or may not be called
* repeatedly, and/or interleaved with calls to
* cipher_udpate(), depending on the cipher.
* E.g. for GCM is must be called exactly once, right
* after cipher_reset().
*
* \param ctx generic cipher context
* \param ad Additional data to use.
* \param ad_len Length of ad.
*
* \returns 0 on success, or a specific error code.
*/
int cipher_update_ad( cipher_context_t *ctx,
const unsigned char *ad, size_t ad_len );
/**
* \brief Generic cipher update function. Encrypts/decrypts