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ecdsa: Support multiple ECDSA keys

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Add provision to choose which efuse block should be used as ECDSA
private key
This commit is contained in:
Sachin Parekh
2023-03-31 14:34:30 +05:30
parent 174ef6c4a3
commit abc099ce9f
7 changed files with 43 additions and 10 deletions
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10
components/mbedtls/port/include/ecdsa/ecdsa_alt.h
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@@ -21,11 +21,6 @@ extern "C" {
* We break the MPI struct of the private key in order to
* differentiate between hardware key and software key
*
* @note Currently, `efuse_blk` is not used internally.
* Hardware will choose the efuse block that has purpose set to ECDSA_KEY.
* In case of multiple ECDSA_KEY burnt in efuse, hardware will choose the
* greater efuse block number as the private key.
*
* @param key The MPI in which this functions stores the hardware context.
* This must be uninitialized
* @param efuse_blk The efuse key block that should be used as the private key.
@@ -42,11 +37,6 @@ int esp_ecdsa_privkey_load_mpi(mbedtls_mpi *key, int efuse_blk);
* We break the MPI struct used to represent the private key `d` in ECP keypair
* in order to differentiate between hardware key and software key
*
* @note Currently, `efuse_blk` is not used internally.
* Hardware will choose the efuse block that has purpose set to ECDSA_KEY.
* In case of multiple ECDSA_KEY burnt in efuse, hardware will choose the
* greater efuse block number as the private key.
*
* @param key_ctx The context in which this functions stores the hardware context.
* This must be uninitialized
* @param efuse_blk The efuse key block that should be used as the private key.