Class Magma

Magma core class

Index

Constructors

Methods

decryptBlock encryptBlock getRoundKeys transformG transformT bytesToU32 writeU32ToBytes

Constructors

constructor

new Magma(key: Uint8Array, sbox?: Sbox): Magma
Magma core class
Parameters
- key: Uint8Array
  Encryption key
- sbox: Sbox = sboxes.ID_TC26_GOST_28147_PARAM_Z
  S-Box
Returns Magma
- Defined in src/index.ts:13

Methods

decryptBlock

decryptBlock(block: Uint8Array): Uint8Array
Decrypts single block of data using Magma (Feistel network) encryption algorithm.
Parameters
- block: Uint8Array
  Block to be decrypted
Returns Uint8Array
Decrypted block

Throws
Block size is invalid or data is too short
- Defined in src/index.ts:108

encryptBlock

encryptBlock(block: Uint8Array): Uint8Array
Encrypts single block of data using Magma (Feistel network) encryption algorithm.
Parameters
- block: Uint8Array
  Block to be encrypted
Returns Uint8Array
Encrypted block

Throws
Block size is invalid or data is too short
- Defined in src/index.ts:84

getRoundKeys

getRoundKeys(): number[]
Returns round keys

Returns number[]
- Defined in src/index.ts:74

transformG

transformG(a: number, k: number): number
Applies the G-transformation (Feistel round function) to input value. Performs addition with round key, applies T-transformation, and performs cyclic left shift.
Parameters
- a: number
  Input 32-bit value to be transformed
- k: number
  Round key used in the transformation
Returns number
Transformed 32-bit value after G-transformation
- Defined in src/index.ts:64

transformT

transformT(value: number): number
Applies substitution transformation (T-transformation) using S-box. Breaks input value into 4-bit parts, substitutes each part using corresponding S-box row, and reconstructs transformed value.
Parameters
- value: number
  Value to be transformed
Returns number
Transformed 32-bit value after substitution
- Defined in src/index.ts:49

`Static`bytesToU32

bytesToU32(bytes: Uint8Array): number
Convert bytes to uint32 number
Parameters
- bytes: Uint8Array
Returns number
- Defined in src/index.ts:127

`Static`writeU32ToBytes

writeU32ToBytes(value: number, buffer: Uint8Array, offset: number): void
Convert uint32 number to bytes
Parameters
- value: number
- buffer: Uint8Array
- offset: number
Returns void
- Defined in src/index.ts:132