/**
* @brief set the supported crypto types
*
* @param[int/out] zrtpContext The ZRTP context we're dealing with
* @param[in] algoType mapped to defines, must be in [ZRTP_HASH_TYPE, ZRTP_CIPHERBLOCK_TYPE, ZRTP_AUTHTAG_TYPE, ZRTP_KEYAGREEMENT_TYPE or ZRTP_SAS_TYPE]
* @param[in] supportedTypes mapped to uint8_t value of the 4 char strings giving the supported types as string according to rfc section 5.1.2 to 5.1.6
* @param[in] supportedTypesCount number of supported crypto types
*/
void bzrtp_setSupportedCryptoTypes(bzrtpContext_t *zrtpContext, uint8_t algoType, uint8_t supportedTypes[7], uint8_t supportedTypesCount)
{
uint8_t implementedTypes[7];
uint8_t implementedTypesCount;
if (zrtpContext==NULL) {
return;
}
implementedTypesCount = bzrtpUtils_getAvailableCryptoTypes(algoType, implementedTypes);
switch(algoType) {
case ZRTP_HASH_TYPE:
zrtpContext->hc = selectCommonAlgo(supportedTypes, supportedTypesCount, implementedTypes, implementedTypesCount, zrtpContext->supportedHash);
addMandatoryCryptoTypesIfNeeded(algoType, zrtpContext->supportedHash, &zrtpContext->hc);
break;
case ZRTP_CIPHERBLOCK_TYPE:
zrtpContext->cc = selectCommonAlgo(supportedTypes, supportedTypesCount, implementedTypes, implementedTypesCount, zrtpContext->supportedCipher);
addMandatoryCryptoTypesIfNeeded(algoType, zrtpContext->supportedCipher, &zrtpContext->cc);
break;
case ZRTP_AUTHTAG_TYPE:
zrtpContext->ac = selectCommonAlgo(supportedTypes, supportedTypesCount, implementedTypes, implementedTypesCount, zrtpContext->supportedAuthTag);
addMandatoryCryptoTypesIfNeeded(algoType, zrtpContext->supportedAuthTag, &zrtpContext->ac);
break;
case ZRTP_KEYAGREEMENT_TYPE:
zrtpContext->kc = selectCommonAlgo(supportedTypes, supportedTypesCount, implementedTypes, implementedTypesCount, zrtpContext->supportedKeyAgreement);
addMandatoryCryptoTypesIfNeeded(algoType, zrtpContext->supportedKeyAgreement, &zrtpContext->kc);
break;
case ZRTP_SAS_TYPE:
zrtpContext->sc = selectCommonAlgo(supportedTypes, supportedTypesCount, implementedTypes, implementedTypesCount, zrtpContext->supportedSas);
addMandatoryCryptoTypesIfNeeded(algoType, zrtpContext->supportedSas, &zrtpContext->sc);
break;
}
}
static int testAddMandatoryCryptoTypesIfNeeded(uint8_t algoType, uint8_t *algoTypes, uint8_t algoTypesCount, uint8_t *expectedTypes, uint8_t expectedTypesCount) {
addMandatoryCryptoTypesIfNeeded(algoType, algoTypes, &algoTypesCount);
return compareAlgoTypes(algoTypes, algoTypesCount, expectedTypes, expectedTypesCount);
}
