sm2_encrypt_asn1: SM2 Encrypt/Decrypt - asn.1

In smcryptoR: ShangMi(SM) Cryptographic Algorithms(SM2/SM3/SM4)

SM2 Encrypt/Decrypt - asn.1

Description

According to the usage specifications of the SM2 algorithm, the encrypted data should be encoded using ASN.1, specifically including XCoordinate, YCoordinate, HASH, and CipherText. Among them, XCoordinate and YCoordinate each occupy 32 bytes, HASH occupies 32 bytes, and CipherText is the same length as the plaintext, plus a one-byte "04" identifier. After SM2 encryption and ASN.1 encoding, the ciphertext data will be 97 bytes longer than the original plaintext data.

Usage

sm2_encrypt_asna1(data, public_key)

sm2_decrypt_asna1(data, private_key)

Arguments

data	data to be encrypted or decrypted, must be a raw vector
public_key	a public key represented as a hexadecimal string
private_key	a private key represented as a hexadecimal string

Value

sm2_encrypt_asna1

returns a raw vector of the cipher text in the asn.1 encoding

sm2_decrypt_asna1

returns a raw vector of the plain text

Examples

## encrypt and decrypt as asn.1
keypair <- sm2_gen_keypair()
private_key <- keypair$private_key
public_key <- keypair$public_key
data <- 'abc' |> charToRaw()
enc <- sm2_encrypt_asna1(data, public_key)
enc
dec <- sm2_decrypt_asna1(enc, private_key)
dec

smcryptoR documentation built on June 22, 2024, 11:46 a.m.