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Diffstat (limited to 'Source/charon/transforms/hmac.h')
| -rw-r--r-- | Source/charon/transforms/hmac.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Source/charon/transforms/hmac.h b/Source/charon/transforms/hmac.h index 14cec6818..25b59d0b5 100644 --- a/Source/charon/transforms/hmac.h +++ b/Source/charon/transforms/hmac.h @@ -37,6 +37,11 @@ struct hmac_s { /** * @brief Generate message authentication code. * + * If buffer is NULL, no result is given back. A next call will + * append the data to already supplied. If buffer is not NULL, + * the mac of all apended data is calculated, returned and the + * state of the hmac_t reset; + * * @param this calling hmac * @param data chunk of data to authenticate * @param [out]buffer pointer where the generated bytes will be written @@ -49,6 +54,11 @@ struct hmac_s { * @brief Generates message authentication code and * allocate space for them. * + * If chunk is NULL, no result is given back. A next call will + * append the data to already supplied. If chunk is not NULL, + * the mac of all apended data is calculated, returned and the + * state of the hmac_t reset; + * * @param this calling hmac * @param data chunk of data to authenticate * @param [out]chunk chunk which will hold generated bytes |