Add experimental stream archive support

2026-04-15 18:40:40 +02:00
parent 09d51fdf2f
commit ae3c3cb33c
4 changed files with 191 additions and 39 deletions
--- a/src/crypto.cpp
+++ b/src/crypto.cpp
@@ -205,6 +205,42 @@ std::vector<std::uint8_t> decrypt_payload(
    return plaintext;
 }

+std::vector<std::uint8_t> encrypt_payload_stream(
+    const std::vector<std::uint8_t>& plaintext,
+    const std::array<std::uint8_t, kAeadKeySize>& key,
+    const std::array<std::uint8_t, kAeadNonceSize>& nonce)
+{
+    std::vector<std::uint8_t> ciphertext(plaintext.size());
+    if (!plaintext.empty())
+    {
+        crypto_stream_xchacha20_xor(
+            ciphertext.data(),
+            plaintext.data(),
+            plaintext.size(),
+            nonce.data(),
+            key.data());
+    }
+    return ciphertext;
+}
+
+std::vector<std::uint8_t> decrypt_payload_stream(
+    const std::vector<std::uint8_t>& ciphertext,
+    const std::array<std::uint8_t, kAeadKeySize>& key,
+    const std::array<std::uint8_t, kAeadNonceSize>& nonce)
+{
+    std::vector<std::uint8_t> plaintext(ciphertext.size());
+    if (!ciphertext.empty())
+    {
+        crypto_stream_xchacha20_xor(
+            plaintext.data(),
+            ciphertext.data(),
+            ciphertext.size(),
+            nonce.data(),
+            key.data());
+    }
+    return plaintext;
+}
+
 std::vector<std::uint8_t> sign_detached(
    const std::vector<std::uint8_t>& data,
    const std::vector<std::uint8_t>& secret_key)