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Miscellaneous clarifications

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
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Gilles Peskine 2024-07-31 15:37:46 +02:00
parent f13fdf8a80
commit fd01bec6b6
1 changed files with 4 additions and 4 deletions
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docs/architecture/psa-keystore-design.md
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@ -31,7 +31,7 @@ The following operations free a key slot by calling `psa_wipe_key_slot()` and, i
Deinitializing the PSA Crypto subsystem with `mbedtls_psa_crypto_free()` destroys all volatile keys and purges all persistent keys. Deinitializing the PSA Crypto subsystem with `mbedtls_psa_crypto_free()` destroys all volatile keys and purges all persistent keys.
A key slot can be accessed: The library accesses key slots in the following scenarios:
* while the key is being created or loaded; * while the key is being created or loaded;
* while the key is being destroyed or purged; * while the key is being destroyed or purged;
@ -82,10 +82,10 @@ A major constraint on the design of the dynamic key store is the need to preserv
#### Slice abstraction #### Slice abstraction
Some parts of the key slot management code use **key slices** as an abstraction. A key slice is an array of key slots. Key slices are identified by a number which is a small non-negative integer. Some parts of the key slot management code use **key slices** as an abstraction. A key slice is an array of key slots. Key slices are identified by an index which is a small non-negative integer.
* With a [static key store](#static-key-store), there is a single, statically allocated slice, with the number 0. * With a [static key store](#static-key-store), there is a single, statically allocated slice, with the index 0.
* With a [dynamic key store](#dynamic-key-store), there is statically allocated array of pointers to key slices. The slices are allocated on the heap as needed. * With a [dynamic key store](#dynamic-key-store), there is statically allocated array of pointers to key slices. The index of a slice is the index in that array. The slices are allocated on the heap as needed.
#### Key identifiers and slot location #### Key identifiers and slot location