keymask.h

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#pragma once
 
#include <ascii-chat/crypto/sizes.h>
#include <ascii-chat/asciichat_errno.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
 
#define KEYMASK_DIGEST_SIZE 32
#define KEYMASK_WIDTH 34
#define KEYMASK_ROWS 18
// Includes borders, newlines, UTF-8 blocks, and the terminating NUL.
#define KEYMASK_BUFFER_SIZE 1655

asciichat_error_t key_fingerprint_digest(const uint8_t public_key[ED25519_PUBLIC_KEY_SIZE],
                                         uint8_t digest[KEYMASK_DIGEST_SIZE]);

asciichat_error_t keymask_render(const uint8_t digest[KEYMASK_DIGEST_SIZE], bool unicode, char *out, size_t size);