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