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Bignum: Extract modular exponentiation from the prototype #6293

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yanesca opened this issue Sep 16, 2022 · 1 comment
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Bignum: Extract modular exponentiation from the prototype #6293

yanesca opened this issue Sep 16, 2022 · 1 comment
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component-crypto Crypto primitives and low-level interfaces enhancement size-m Estimated task size: medium (~1w)

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@yanesca
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yanesca commented Sep 16, 2022 •
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Prerequisites: #6015

Extract mbedtls_mpi_core_exp_mod from the prototype:
https://github.com/hanno-arm/mbedtls/blob/ecp_prototype/library/bignum_core.c#L644-L757

Notable differences to the prototype:

The legacy API should reuse this function as usual. The algorithm has been changed in the prototype, reusing it needs more deliberation and care and has been moved to a separate issue: #6600
@yanesca yanesca added enhancement component-crypto Crypto primitives and low-level interfaces size-m Estimated task size: medium (~1w) labels Sep 16, 2022
@yanesca yanesca mentioned this issue Sep 16, 2022
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@yanesca yanesca changed the title Extract modular multiplication from the prototype Extract modular exponentiation from the prototype Sep 16, 2022
@yanesca yanesca self-assigned this Sep 30, 2022
@tom-cosgrove-arm tom-cosgrove-arm changed the title Extract modular exponentiation from the prototype Bignum: Extract modular exponentiation from the prototype Oct 25, 2022
@yanesca yanesca mentioned this issue Oct 31, 2022
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@yanesca yanesca mentioned this issue Nov 7, 2022
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@tom-cosgrove-arm tom-cosgrove-arm mentioned this issue Dec 6, 2022
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tom-cosgrove-arm added a commit to tom-cosgrove-arm/mbedtls that referenced this issue Dec 6, 2022
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Have mbedtls_mpi_core_exp_mod() take a temporary instead of allocatin…
0a0dded 
…g memory

Last PR needed for Mbed-TLS#6293

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
@tom-cosgrove-arm tom-cosgrove-arm mentioned this issue Dec 6, 2022
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Now complete following the merges of #6731 and #6733

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