From a16b33031c7bcf2eabf1e0c3571000234b7740df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roman=20Smr=C5=BE?= <roman.smrz@seznam.cz>
Date: Sun, 24 Jan 2021 22:46:48 +0100
Subject: Attach service

---
 src/pubkey.cpp | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'src/pubkey.cpp')

diff --git a/src/pubkey.cpp b/src/pubkey.cpp
index 6d85d33..6461c10 100644
--- a/src/pubkey.cpp
+++ b/src/pubkey.cpp
@@ -88,6 +88,45 @@ optional<SecretKey> SecretKey::load(const Stored<PublicKey> & pub)
 	return SecretKey(key, pub);
 }
 
+optional<SecretKey> SecretKey::fromData(const Stored<PublicKey> & pub, const vector<uint8_t> & sdata)
+{
+	shared_ptr<EVP_PKEY> pkey(
+			EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, NULL,
+				sdata.data(), sdata.size()),
+			EVP_PKEY_free);
+	if (!pkey)
+		return nullopt;
+
+	vector<uint8_t> keyData;
+	size_t keyLen;
+
+	EVP_PKEY_get_raw_public_key(pkey.get(), nullptr, &keyLen);
+	keyData.resize(keyLen);
+	EVP_PKEY_get_raw_public_key(pkey.get(), keyData.data(), &keyLen);
+
+	EVP_PKEY_get_raw_public_key(pub->key.get(), nullptr, &keyLen);
+	keyData.resize(keyLen);
+	EVP_PKEY_get_raw_public_key(pub->key.get(), keyData.data(), &keyLen);
+
+	if (EVP_PKEY_cmp(pkey.get(), pub->key.get()) != 1)
+		return nullopt;
+
+	pub.ref().storage().storeKey(pub.ref(), sdata);
+	return SecretKey(std::move(pkey), pub);
+}
+
+vector<uint8_t> SecretKey::getData() const
+{
+	vector<uint8_t> keyData;
+	size_t keyLen;
+
+	EVP_PKEY_get_raw_private_key(key.get(), nullptr, &keyLen);
+	keyData.resize(keyLen);
+	EVP_PKEY_get_raw_private_key(key.get(), keyData.data(), &keyLen);
+
+	return keyData;
+}
+
 vector<uint8_t> SecretKey::sign(const Digest & dgst) const
 {
 	unique_ptr<EVP_MD_CTX, void(*)(EVP_MD_CTX*)>
-- 
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