Revert^2 "Refactor IC support for RKP"

#ifndef IDENTITY_SUPPORT_INCLUDE_IDENTITY_CREDENTIAL_UTILS_H_

#define IDENTITY_SUPPORT_INCLUDE_IDENTITY_CREDENTIAL_UTILS_H_

#include <openssl/evp.h>

#include <cstdint>

#include <map>

#include <optional>

        const vector<uint8_t>& challenge, const vector<uint8_t>& applicationId,

        bool isTestCredential);

// Alternate version of createEcKeyPairAndAttestation that accepts an attestation key

// blob to sign the generated key. Only a single certificate is returned, rather than

// a full chain.

//

optional<std::pair<vector<uint8_t>, vector<uint8_t>>> createEcKeyPairWithAttestationKey(

        const vector<uint8_t>& challenge, const vector<uint8_t>& applicationId,

        const vector<uint8_t>& attestationKeyBlob, const vector<uint8_t>& attestationKeyCert,

        bool isTestCredential);

// (TODO: remove when no longer used by 3rd party.)

optional<vector<vector<uint8_t>>> createAttestationForEcPublicKey(

        const vector<uint8_t>& publicKey, const vector<uint8_t>& challenge,

        time_t validityNotBefore, time_t validityNotAfter,

        const map<string, vector<uint8_t>>& extensions);

// Identical behavior to the above version of ecPublicKeyGenerateCertificate, except this

// overload takes OpenSSL key parameters instead of key bitstrings as inputs.

optional<vector<uint8_t>> ecPublicKeyGenerateCertificate(

        EVP_PKEY* publicKey, EVP_PKEY* signingKey, const string& serialDecimal,

        const string& issuer, const string& subject, time_t validityNotBefore,

        time_t validityNotAfter, const map<string, vector<uint8_t>>& extensions);

// Performs Elliptic-curve Diffie-Helman using |publicKey| (which must be in the

// format returned by ecKeyPairGetPublicKey()) and |privateKey| (which must be

// in the format returned by ecKeyPairGetPrivateKey()).