package sshkeys

// Needed for V1 key format.
const (
	KeyV1Magic string = "openssh-key-v1"
)

// "Meta". Used for comment strings, etc.

const projUrl = "https://git.square-r00t.net/SSHSecure"

// Defaults.
const (
	defCipher     string = CipherAes256Ctr
	defKeyType    string = KeyEd25519
	defKDF        string = KdfBcrypt
	defRounds     uint32 = 100
	defRSABitSize uint32 = 4096
	defSaltLen    int    = 16
	// bcrypt_pbkdf maxes out at 32 for private key gen (sk is actually 64; sk+pk)
	// But per OpenSSH code, we pass a key len of kdfKeyLen + len(salt)
	kdfKeyLen int = 32
	kdfSplit  int = 32
)

// Cipher names. I believe only AES256-CTR is supported upstream currently.
const (
	CipherNull      string = "none"
	CipherAes256Ctr string = "aes256-ctr"
)

var allowed_ciphers = [...]string{CipherNull, CipherAes256Ctr}

// Key types.
const (
	KeyEd25519 string = "ssh-ed25519"
	KeyRsa     string = "ssh-rsa"
)

var allowed_keytypes = [...]string{KeyEd25519, KeyRsa}

// KDF names. I believe only bcrypt is supported upstream currently.
const (
	KdfNull   string = "none"
	KdfBcrypt string = "bcrypt"
)

var allowed_kdfnames = [...]string{KdfNull, KdfBcrypt}

// Key lengths.
const (
	// ED25519 in OpenSSH uses a static key size of 64 bytes.
	ed25519Len uint32 = 64
)

// Key/Block sizes.
const (
	keyEd25519 uint32 = 32
	// Is this correct? Based on PROTOCOL.key's "padlen % 255", it seems to be.
	blockPad     uint32 = 255
	blockEd25519 uint32 = 16
	// Blocksize for RSA depends on key bits, I think.
	blockNull uint32 = 8
)