d2i_PKCS7_SIGN_ENVELOPE
LCRYPTO_USED(d2i_PKCS7_SIGN_ENVELOPE);
LCRYPTO_ALIAS(d2i_PKCS7_SIGN_ENVELOPE);
PKCS7_SIGN_ENVELOPE *d2i_PKCS7_SIGN_ENVELOPE(PKCS7_SIGN_ENVELOPE **a, const unsigned char **in, long len);