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CC26xx Driver Library
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CC26xx Driver Library
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The AES (advanced encryption standard) API provides access to the AES and key store functionality of the crypto core. The SHA2 accelerator is also contained within the crypto core. Hence, only one of SHA2 and AES may be used at the same time. This module offers hardware acceleration for several protocols using the AES block cypher. The protocols below are supported by the hardware. The driverlib documentation only explicitly references the most commonly used ones.
The key store is a section of crypto memory that is only accessible to the crypto module and may be written to by the application via the crypto DMA. It is not possible to read from the key store to main memory. Thereby, it is not possible to compromise the key should the application be hacked if the original key in main memory was overwritten already.
The crypto core does not have retention and all configuration settings and keys in the key store are lost when going into standby or shutdown. The typical security advantages a key store offers are not available in these low power modes as the key must be saved in regular memory to reload it after going into standby or shutdown. Consequently, the key store primarily serves as an interface to the AES accelerator.
