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EVP_SM4_CBC(3)        DragonFly 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. DragonFly 5.7-DEVELOPMENT March 18, 2019 DragonFly 5.7-DEVELOPMENT

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