EVP_SM4_CBC(3) Library Functions Manual EVP_SM4_CBC(3)
NAME
EVP_sm4_cbc, EVP_sm4_ecb, EVP_sm4_cfb, EVP_sm4_cfb128, EVP_sm4_ofb, EVP_sm4_ctr — EVP SM4 cipher
SYNOPSIS
#include <openssl/evp.h>
const EVP_CIPHER *
EVP_sm4_cbc(void);
const EVP_CIPHER *
EVP_sm4_ecb(void);
const EVP_CIPHER *
EVP_sm4_cfb(void);
const EVP_CIPHER *
EVP_sm4_cfb128(void);
const EVP_CIPHER *
EVP_sm4_ofb(void);
const EVP_CIPHER *
EVP_sm4_ctr(void);
DESCRIPTION
These functions provide the SM4 blockcipher in the evp(3) framework.
All modes use a key length of 128 bits and act on blocks of 128 bits.
EVP_sm4_cfb() is an alias for EVP_sm4_cfb128().
With an argument of "sm4" or "SM4", EVP_get_cipherbyname(3) returns EVP_sm4_cbc().
RETURN VALUES
These functions return an EVP_CIPHER structure that provides the implementation of the symmetric cipher.
SEE ALSO
evp(3), EVP_EncryptInit(3)
STANDARDS
Information security technology - SM4 block cipher
algorithm
,
National Standards of People’s Republic of
China ,
GB/T 32907-2016 ,
August 29, 2016 .
HISTORY
These functions appeared in OpenSSL 1.1.1 and have been available since OpenBSD 6.5. GNU March 18, 2019 EVP_SM4_CBC(3)