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More fixes

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2022-09-21 16:30:49 +02:00
parent 99fc76a385
commit 4ab898378a
4 changed files with 125 additions and 36 deletions
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14
src/fido/credential.c
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@@ -214,3 +214,17 @@ int credential_store(const uint8_t *cred_id, size_t cred_id_len, const uint8_t *
low_flash_available();
return 0;
}
int credential_derive_hmac_key(const uint8_t *cred_id, size_t cred_id_len, uint8_t *outk) {
memset(outk, 0, 64);
int r = 0;
if ((r = load_keydev(outk)) != 0)
return r;
const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA512);
mbedtls_md_hmac(md_info, outk, 32, (uint8_t *)"SLIP-0022", 9, outk);
mbedtls_md_hmac(md_info, outk, 32, (uint8_t *)"\xf1\xd0\x02\x00", 4, outk);
mbedtls_md_hmac(md_info, outk, 32, (uint8_t *)"hmac-secret", 11, outk);
mbedtls_md_hmac(md_info, outk, 32, cred_id, cred_id_len, outk);
return 0;
}