keys.h

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#pragma once

 
#include <ascii-chat/crypto/sizes.h>
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include "../common.h" // For asciichat_error_t
#include "key_types.h" // Include the key type definitions
 
// Include specialized key modules
#include "ssh/ssh_keys.h"
#include "gpg/gpg_keys.h"
#include "https_keys.h"
#include "keys_validation.h"


asciichat_error_t parse_public_key(const char *input, public_key_t *key_out);

asciichat_error_t parse_public_keys(const char *input, public_key_t *keys_out, size_t *num_keys, size_t max_keys);



asciichat_error_t parse_private_key(const char *path, private_key_t *key_out);



asciichat_error_t public_key_to_x25519(const public_key_t *key, uint8_t x25519_pk[X25519_KEY_SIZE]);

asciichat_error_t private_key_to_x25519(const private_key_t *key, uint8_t x25519_sk[X25519_KEY_SIZE]);



asciichat_error_t ed25519_sign_message(const private_key_t *key, const uint8_t *message, size_t message_len,
                                       uint8_t signature[ED25519_SIGNATURE_SIZE]);

asciichat_error_t ed25519_verify_signature(const uint8_t public_key[ED25519_PUBLIC_KEY_SIZE], const uint8_t *message,
                                           size_t message_len, const uint8_t signature[ED25519_SIGNATURE_SIZE],
                                           const char *gpg_key_id);



asciichat_error_t fetch_github_keys(const char *username, char ***keys_out, size_t *num_keys, bool use_gpg);

asciichat_error_t fetch_gitlab_keys(const char *username, char ***keys_out, size_t *num_keys, bool use_gpg);

asciichat_error_t fetch_github_gpg_keys(const char *username, char ***keys_out, size_t *num_keys);

asciichat_error_t fetch_gitlab_gpg_keys(const char *username, char ***keys_out, size_t *num_keys);



asciichat_error_t parse_gpg_key(const char *gpg_key_text, public_key_t *key_out);

asciichat_error_t parse_keys_from_file(const char *path, public_key_t *keys, size_t *num_keys, size_t max_keys);



void format_public_key(const public_key_t *key, char *output, size_t output_size);

asciichat_error_t hex_decode(const char *hex, uint8_t *output, size_t output_len);

asciichat_error_t validate_ssh_key_file(const char *key_path);

 
// Forward declaration (full definition in handshake.h)
// Note: This avoids circular includes (handshake.h includes keys.h)
typedef struct crypto_handshake_context_t crypto_handshake_context_t;