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Improve documentation of mbedtls_record

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Hanno Becker 2019-04-04 16:29:48 +01:00
parent 78f839df94
commit cd430bc099
1 changed files with 5 additions and 2 deletions
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7
include/mbedtls/ssl_internal.h
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@ -611,8 +611,11 @@ struct mbedtls_ssl_transform
* (1) Encrypted
* These always have data_offset = 0
* (2) Unencrypted
* These have data_offset set to the length of the
* fixed part of the IV used for encryption.
* These have data_offset set to the amount of
* pre-expansion during record protection. Concretely,
* this is the length of the fixed part of the explicit IV
* used for encryption, or 0 if no explicit IV is used
* (e.g. for CBC in TLS 1.0, or stream ciphers).
*
* The reason for the data_offset in the unencrypted case
* is to allow for in-place conversion of an unencrypted to