lib/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-07-28 00:21:48 +03:00
Code Activity

Refactor to prepare for CCM decryption

Browse Source
This commit is contained in:
Manuel Pégourié-Gonnard
2014-05-06 15:56:07 +02:00
parent 9322e49037
commit 002323340a
3 changed files with 94 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
include/polarssl/ccm.h
View File

@ -84,19 +84,43 @@ void ccm_free( ccm_context *ctx );
* \param tag_len length of the tag to generate in bytes
* must be 4, 6, 8, 10, 14 or 16
*
* \note The tag is written to a separete buffer. To get the tag
* \note The tag is written to a separate buffer. To get the tag
* concatenated with the output as in the CCM spec, use
* tag = output + length and make sure the output buffer is
* at least length + tag_len wide.
*
* \return 0 if successful
*/
int ccm_crypt_and_tag( ccm_context *ctx, size_t length,
const unsigned char *iv, size_t iv_len,
const unsigned char *add, size_t add_len,
const unsigned char *input, unsigned char *output,
unsigned char *tag, size_t tag_len );
int ccm_encrypt_and_tag( ccm_context *ctx, size_t length,
const unsigned char *iv, size_t iv_len,
const unsigned char *add, size_t add_len,
const unsigned char *input, unsigned char *output,
unsigned char *tag, size_t tag_len );
/**
* \brief CCM buffer authenticated decryption
*
* \todo Document if input/output buffers can be the same
*
* \param ctx CCM context
* \param length length of the input data
* \param iv initialization vector
* \param iv_len length of IV
* \param add additional data
* \param add_len length of additional data
* \param input buffer holding the input data
* \param output buffer for holding the output data
* \param tag buffer holding the tag
* \param tag_len length of the tag
*
* \return 0 if successful and authenticated,
* POLARSSL_ERR_CCM_AUTH_FAILED if tag does not match
*/
int ccm_auth_decrypt( ccm_context *ctx, size_t length,
const unsigned char *iv, size_t iv_len,
const unsigned char *add, size_t add_len,
const unsigned char *input, unsigned char *output,
const unsigned char *tag, size_t tag_len );
#if defined(POLARSSL_SELF_TEST) && defined(POLARSSL_AES_C)
/**