Completed refactoring to separate nip files, and updating build.sh

nostr_core/nip044.h

@@ -0,0 +1,72 @@
+/*
+ * NIP-44: Encrypted Payloads (Versioned)
+ * https://github.com/nostr-protocol/nips/blob/master/44.md
+ */
+
+#ifndef NOSTR_NIP044_H
+#define NOSTR_NIP044_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// NIP-44 constants
+// #define NOSTR_NIP44_MAX_PLAINTEXT_SIZE 65535
+
+/**
+ * NIP-44: Encrypt a message using ECDH + ChaCha20 + HMAC
+ * 
+ * @param sender_private_key 32-byte sender private key
+ * @param recipient_public_key 32-byte recipient public key (x-only)
+ * @param plaintext Message to encrypt
+ * @param output Buffer for encrypted output (base64 encoded)
+ * @param output_size Size of output buffer
+ * @return NOSTR_SUCCESS on success, error code on failure
+ */
+int nostr_nip44_encrypt(const unsigned char* sender_private_key,
+                       const unsigned char* recipient_public_key,
+                       const char* plaintext,
+                       char* output,
+                       size_t output_size);
+
+/**
+ * NIP-44: Encrypt a message with a specific nonce (for testing)
+ * 
+ * @param sender_private_key 32-byte sender private key
+ * @param recipient_public_key 32-byte recipient public key (x-only)
+ * @param plaintext Message to encrypt
+ * @param nonce 32-byte nonce
+ * @param output Buffer for encrypted output (base64 encoded)
+ * @param output_size Size of output buffer
+ * @return NOSTR_SUCCESS on success, error code on failure
+ */
+int nostr_nip44_encrypt_with_nonce(const unsigned char* sender_private_key,
+                                  const unsigned char* recipient_public_key,
+                                  const char* plaintext,
+                                  const unsigned char* nonce,
+                                  char* output,
+                                  size_t output_size);
+
+/**
+ * NIP-44: Decrypt a message using ECDH + ChaCha20 + HMAC
+ * 
+ * @param recipient_private_key 32-byte recipient private key
+ * @param sender_public_key 32-byte sender public key (x-only)
+ * @param encrypted_data Encrypted message (base64 encoded)
+ * @param output Buffer for decrypted plaintext
+ * @param output_size Size of output buffer
+ * @return NOSTR_SUCCESS on success, error code on failure
+ */
+int nostr_nip44_decrypt(const unsigned char* recipient_private_key,
+                       const unsigned char* sender_public_key,
+                       const char* encrypted_data,
+                       char* output,
+                       size_t output_size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NOSTR_NIP044_H