covid19/CovidBracelet
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Derive period identifier key

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This commit is contained in:
Patrick Rathje 2020-12-09 11:13:51 +01:00
parent 69952363f5
commit d451e6a131
1 changed files with 7 additions and 4 deletions
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11
src/covid.c
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@ -284,11 +284,14 @@ static void check_keys(struct k_work *work)
}
// we now generate the new interval identifier and re-encrypt the metadata
en_derive_interval_identifier(&intervalIdentifier, &periods[current_period_index].periodKey, currentInterval);
// TODO: The period identifier key does not need to be derived everytime!
ENPeriodIdentifierKey pik;
en_derive_period_identifier_key(&pik, &periods[current_period_index].periodKey);
en_derive_interval_identifier(&intervalIdentifier, &pik, currentInterval);
en_derive_period_metadata_encryption_key(&periodMetadataEncryptionKey, &periods[current_period_index].periodKey);
en_encrypt_interval_metadata(&periodMetadataEncryptionKey, &intervalIdentifier, (unsigned char *)&bt_metadata, (unsigned char *)&encryptedMetadata, sizeof(associated_encrypted_metadata_t));
en_encrypt_interval_metadata(&periodMetadataEncryptionKey, &intervalIdentifier, (unsigned char*)&bt_metadata, (unsigned char*)&encryptedMetadata, sizeof(associated_encrypted_metadata_t));
// broadcast intervalIdentifier plus encryptedMetada according to specs
//printk("\n----------------------------------------\n\n");