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Add migration guide for developers of CCM alternative implementation

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
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Ronald Cron 2021-05-27 11:48:00 +02:00
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docs/3.0-migration-guide.d/ccm-alt.md Normal file
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CCM interface changes: impact for alternative implementations
-------------------------------------------------------------
The CCM interface has changed with the addition of support for
multi-part operations. Five new API functions have been defined:
mbedtls_ccm_starts(), mbedtls_ccm_set_lengths(),
mbedtls_ccm_update_ad(), mbedtls_ccm_update() and mbedtls_ccm_finish().
Alternative implementations of CCM (`MBEDTLS_CCM_ALT`) have now to
implement those additional five API functions.