Module: crypto/cfb

crypto/cfb

Source:

Methods

<static> decrypt(blockcipherfn, block_size, plaintext, key, resync) → {String}

This function decrypts a given plaintext using the specified blockcipher to decrypt a message
Parameters:
Name Type Description
blockcipherfn openpgp_cipher_block_fn The algorithm _encrypt_ function to encrypt data in one block_size encryption.
block_size Integer the block size in bytes of the algorithm used
plaintext String ciphertext to be decrypted provided as a string
key openpgp_byte_array key to be used to decrypt the ciphertext. This will be passed to the blockcipherfn
resync Boolean a boolean value specifying if a resync of the IV should be used or not. The encrypteddatapacket uses the "old" style with a resync. Decryption within an encryptedintegrityprotecteddata packet is not resyncing the IV.
Source:
Returns:
a string with the plaintext data
Type
String

<static> encrypt(prefixrandom, blockcipherfn, block_size, plaintext, key, resync) → {String}

This function encrypts a given with the specified prefixrandom using the specified blockcipher to encrypt a message
Parameters:
Name Type Description
prefixrandom String random bytes of block_size length provided as a string to be used in prefixing the data
blockcipherfn openpgp_cipher_block_fn the algorithm encrypt function to encrypt data in one block_size encryption.
block_size Integer the block size in bytes of the algorithm used
plaintext String data to be encrypted provided as a string
key openpgp_byte_array key to be used to encrypt the data. This will be passed to the blockcipherfn
resync Boolean a boolean value specifying if a resync of the IV should be used or not. The encrypteddatapacket uses the "old" style with a resync. Encryption within an encryptedintegrityprotecteddata packet is not resyncing the IV.
Source:
Returns:
a string with the encrypted data
Type
String

<static> mdc(block_size, key, ciphertext) → {String}

Decrypts the prefixed data for the Modification Detection Code (MDC) computation
Parameters:
Name Type Description
cipherfn.encrypt openpgp_block_cipher_fn Cipher function to use
block_size Integer Blocksize of the algorithm
key openpgp_byte_array The key for encryption
ciphertext String The encrypted data
Source:
Returns:
plaintext Data of D(ciphertext) with blocksize length +2
Type
String