sizes.h

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#pragma once
 
/* Existing buffer budgets in bytes, including NUL for text storage. */
#define GPG_SIGNATURE_PACKET_CAPACITY 512
 
/* Existing buffer budgets in bytes, including NUL for text storage. */
#define ED25519_SIGNATURE_PART_SIZE (ED25519_SIGNATURE_SIZE / 2)
 
#include <ascii-chat/common/limits.h>



#define MIN_PASSWORD_LENGTH 8
#define MAX_PASSWORD_LENGTH 256



#define X25519_KEY_SIZE 32
#define ED25519_PUBLIC_KEY_SIZE 32
#define ED25519_PRIVATE_KEY_SIZE 64
#define ED25519_SIGNATURE_SIZE 64
#define XSALSA20_NONCE_SIZE 24
#define POLY1305_MAC_SIZE 16
#define HMAC_SHA256_SIZE 32
#define HMAC_SHA256_KEY_SIZE 32
#define ARGON2ID_SALT_SIZE 32
#define SECRETBOX_KEY_SIZE 32
#define AES256_KEY_SIZE 32
#define AES_IV_SIZE 16
#define AES256_DERIVED_SIZE (AES256_KEY_SIZE + AES_IV_SIZE)



#define CRYPTO_PUBLIC_KEY_SIZE X25519_KEY_SIZE
#define CRYPTO_PRIVATE_KEY_SIZE X25519_KEY_SIZE
#define CRYPTO_SHARED_KEY_SIZE X25519_KEY_SIZE
#define CRYPTO_ED25519_PUBLIC_KEY_SIZE ED25519_PUBLIC_KEY_SIZE
#define CRYPTO_ED25519_PRIVATE_KEY_SIZE ED25519_PRIVATE_KEY_SIZE
#define CRYPTO_ED25519_SIGNATURE_SIZE ED25519_SIGNATURE_SIZE
#define CRYPTO_NONCE_SIZE XSALSA20_NONCE_SIZE
#define CRYPTO_SALT_SIZE ARGON2ID_SALT_SIZE
#define CRYPTO_ENCRYPTION_KEY_SIZE SECRETBOX_KEY_SIZE
#define CRYPTO_MAC_SIZE POLY1305_MAC_SIZE
#define CRYPTO_HMAC_SIZE HMAC_SHA256_SIZE



#define AUTH_HMAC_SIZE 32
#define AUTH_CHALLENGE_SIZE 32
#define AUTH_COMBINED_SIZE (AUTH_HMAC_SIZE + AUTH_CHALLENGE_SIZE)
#define AUTH_SIGNATURE_SIZE 64
#define AUTH_SIGNATURE_COMBINED_SIZE (AUTH_SIGNATURE_SIZE + AUTH_CHALLENGE_SIZE)



#define AUTH_CHALLENGE_FLAGS_SIZE 1
#define AUTH_CHALLENGE_PACKET_SIZE (AUTH_CHALLENGE_FLAGS_SIZE + AUTH_CHALLENGE_SIZE)



#define AUTH_RESPONSE_PASSWORD_SIZE (AUTH_HMAC_SIZE + AUTH_CHALLENGE_SIZE)
#define AUTH_RESPONSE_SIGNATURE_SIZE (AUTH_SIGNATURE_SIZE + AUTH_CHALLENGE_SIZE)


#define SERVER_AUTH_RESPONSE_SIZE AUTH_HMAC_SIZE


#define MAX_AUTH_FAILED_PACKET_SIZE 256
#define MAX_ENCRYPTED_PACKET_SIZE 65536



#define HEX_STRING_SIZE_32 (32 * 2 + 1)
#define HEX_STRING_SIZE_64 (64 * 2 + 1)
#define PASSWORD_BUFFER_SIZE 256
#define ZERO_KEY_SIZE X25519_KEY_SIZE


#define ED25519_SEED_SIZE 32
#define GPG_FINGERPRINT_SIZE 20
#define GPG_FINGERPRINT_HEX_BUFFER_SIZE (GPG_FINGERPRINT_SIZE * 2 + 1)
#define GPG_KEY_ID_SIZE 8
#define GPG_KEY_ID_HEX_BUFFER_SIZE (GPG_KEY_ID_SIZE * 2 + 1)
#define MAX_COMMENT_LEN 256
#define MAX_GPG_KEYGRIP_LEN 64