smcryptoR (version 0.1.2)

sm4_encrypt_ecb: SM4 Encrypt/Decrypt

Description

The SM4 algorithm is a block symmetric encryption algorithm with a block size and key length of 128 bits. Compared to the SM2 algorithm, it has higher encryption and decryption efficiency and can be used to encrypt larger amounts of data. SM4 supports both the ECB (Electronic Codebook) mode and the CBC (Cipher Block Chaining) mode. The ECB mode is a simple block cipher encryption mode that encrypts each data block independently without depending on other blocks. The CBC mode, on the other hand, is a chained block cipher encryption mode where the encryption of each block depends on the previous ciphertext block. Therefore, it requires an initialization vector (IV) of the same 128-bit length. The CBC mode provides higher security than the ECB mode.

Usage

sm4_encrypt_ecb(input_data, key)
sm4_decrypt_ecb(input_data, key)
sm4_encrypt_cbc(input_data, key, iv)
sm4_decrypt_cbc(input_data, key, iv)

Value

sm4_encrypt_ecb

returns a raw vector of the cipher text using ecb mode

sm4_decrypt_ecb

returns a raw vector of the plain text

sm4_encrypt_cbc

returns a raw vector of the cipher text using cbc mode

sm4_decrypt_cbc

returns a raw vector of the plain text

Arguments

input_data

data bytes to be encrypted, must be a raw vector

key

the key, must be a raw vector of length 16

iv

the initialization vector, must be a raw vector of 16

Examples

## ecb mode
data <- 'abc' |> charToRaw()
key <- '1234567812345678' |> charToRaw()
iv <- '0000000000000000' |> charToRaw()
enc <- sm4_encrypt_ecb(data, key)
enc
dec <- sm4_decrypt_ecb(enc, key)
dec
## cbc mode
enc <- sm4_encrypt_cbc(data, key, iv)
enc
dec <- sm4_decrypt_cbc(enc, key, iv)
dec