Package org.apache.sshd.common.cipher

Class SM4CBC

java.lang.Object
org.apache.sshd.common.cipher.SM4CBC
All Implemented Interfaces:
AlgorithmNameProvider, Cipher, CipherInformation, KeySizeIndicator
public class SM4CBC extends Object implements Cipher

  • Field Details

    • mode

      protected Cipher.Mode mode

    • cbcBlockCipher

      private org.bouncycastle.crypto.modes.CBCBlockCipher cbcBlockCipher

  • Constructor Details

    • SM4CBC

      public SM4CBC()

  • Method Details

    • getAlgorithm

      public String getAlgorithm()
      Specified by:
      getAlgorithm in interface AlgorithmNameProvider

    • getTransformation

      public String getTransformation()
      Specified by:
      getTransformation in interface CipherInformation
      Returns:
      The actual transformation used - e.g., AES/CBC/NoPadding

    • getIVSize

      public int getIVSize()
      Specified by:
      getIVSize in interface CipherInformation
      Returns:
      Size of the initialization vector (in bytes)

    • getAuthenticationTagSize

      public int getAuthenticationTagSize()
      Specified by:
      getAuthenticationTagSize in interface CipherInformation
      Returns:
      Size of the authentication tag (AT) in bytes or 0 if this cipher does not support authentication

    • getCipherBlockSize

      public int getCipherBlockSize()
      Specified by:
      getCipherBlockSize in interface CipherInformation
      Returns:
      Size of block data used by the cipher (in bytes). For stream ciphers this value is (currently) used to indicate some average work buffer size to be used for the automatic re-keying mechanism described in RFC 4253 - Section 9

    • getKdfSize

      public int getKdfSize()
      Specified by:
      getKdfSize in interface CipherInformation
      Returns:
      The block size (in bytes) used to derive the secret key for this cipher

    • getKeySize

      public int getKeySize()
      Specified by:
      getKeySize in interface KeySizeIndicator
      Returns:
      The number of bits used in the key

    • init

      public void init(Cipher.Mode mode, byte[] key, byte[] iv) throws Exception
      Description copied from interface: Cipher
      Initialize the cipher for encryption or decryption with the given key and initialization vector
      Specified by:
      init in interface Cipher
      Parameters:
      mode - Encrypt/Decrypt initialization
      key - Key bytes
      iv - Initialization vector bytes
      Throws:
      Exception - If failed to initialize

    • update

      public void update(byte[] input, int inputOffset, int inputLen) throws Exception
      Description copied from interface: Cipher
      Performs in-place encryption or decryption on the given data.
      Specified by:
      update in interface Cipher
      Parameters:
      input - The input/output bytes
      inputOffset - The offset of the data in the data buffer
      inputLen - The number of bytes to update - starting at the given offset
      Throws:
      Exception - If failed to execute

    • updateAAD

      public void updateAAD(byte[] data, int offset, int length) throws Exception
      Description copied from interface: Cipher
      Adds the provided input data as additional authenticated data during encryption or decryption.
      Specified by:
      updateAAD in interface Cipher
      Parameters:
      data - The additional data to authenticate
      offset - The offset of the additional data in the buffer
      length - The number of bytes in the buffer to use for authentication
      Throws:
      Exception - If failed to execute