smcryptoR (version 0.1.2)

sm2_sign: SM2 Sign/Verify

Description

SM2 is an asymmetric encryption algorithm, so it can be used to sign and verify signatures of data. The purpose of doing this is to ensure the integrity of the data and guarantee its authenticity. Typically, the data owner uses the SM3 message digest algorithm to calculate the hash value and signs it with the private key, generating signed data. Then the owner distributes the original data and the signed data of the original data to the receiver. The receiver uses the public key and the received signed data to perform the verification operation. If the verification is successful, it is considered that the received original data has not been tampered with.

Usage

sm2_sign(id, data, private_key)
sm2_verify(id, data, sign, public_key)
sm2_sign_to_file(id, data, sign_file, private_key)
sm2_verify_from_file(id, data, sign_file, public_key)

Value

sm2_sign

returns a raw vector contains the signature

sm2_verify

returns 1 if verified, 0 if not verified

sm2_sign_to_file

returns nothing, and a signature file will be saved in the specified path

sm2_verify_from_file

returns 1 if verified, 0 if not verified

Arguments

id

the signer's id, must be a raw vector

data

orignal data, must be a raw vector

private_key

a private key represented as a hexadecimal string

sign

sign data of the original data or file

public_key

a public key represented as a hexadecimal string

sign_file

file path of the sign data to load

Examples

## sign and verify
id <- charToRaw('[e-mail]')
data <- charToRaw('abc')
keypair <- sm2_gen_keypair()
private_key <- keypair$private_key
public_key <- keypair$public_key
sign_data <- sm2_sign(id, data, private_key)
verify_result <- sm2_verify(id, data, sign_data, public_key)
if (FALSE) {
  sm2_sign_to_file(id, data, 'sign_data.sig', private_key)
  sm2_verify_from_file(id, data, 'sign_data.sig', public_key)
}