Imports github.com/tjfoc/gmsm/sm2 github.com/tjfoc/gmsm/sm4 github.com/tjfoc/gmsm/x509 github.com/wumansgy/goEncrypt/aes github.com/wumansgy/goEncrypt/des github.com/wumansgy/goEncrypt/rsa Standard library imports bytes crypto/cipher crypto/rand crypto/sha256 encoding/base64 encoding/hex errors fmt io os strings