pub struct EVP_CIPHER {
    pub nid: c_int,
    pub block_size: c_int,
    pub key_len: c_int,
    pub iv_len: c_int,
    pub flags: c_ulong,
    pub init: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *const c_uchar, *const c_uchar, c_int) -> c_int>,
    pub do_cipher: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *mut c_uchar, *const c_uchar, size_t) -> c_int>,
    pub cleanup: Option<unsafe extern fn(*mut EVP_CIPHER_CTX) -> c_int>,
    pub ctx_size: c_int,
    pub set_asn1_parameters: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *mut ASN1_TYPE) -> c_int>,
    pub get_asn1_parameters: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *mut ASN1_TYPE) -> c_int>,
    pub ctrl: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, c_int, c_int, *mut c_void) -> c_int>,
    pub app_data: *mut c_void,
}Fields
                           
                           nid: c_int
                           
                           
                           block_size: c_int
                           
                           
                           key_len: c_int
                           
                           
                           iv_len: c_int
                           
                           
                           flags: c_ulong
                           
                           
                           init: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *const c_uchar, *const c_uchar, c_int) -> c_int>
                           
                           
                           do_cipher: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *mut c_uchar, *const c_uchar, size_t) -> c_int>
                           
                           
                           cleanup: Option<unsafe extern fn(*mut EVP_CIPHER_CTX) -> c_int>
                           
                           
                           ctx_size: c_int
                           
                           
                           set_asn1_parameters: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *mut ASN1_TYPE) -> c_int>
                           
                           
                           get_asn1_parameters: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, *mut ASN1_TYPE) -> c_int>
                           
                           
                           ctrl: Option<unsafe extern fn(*mut EVP_CIPHER_CTX, c_int, c_int, *mut c_void) -> c_int>
                           
                           
                           app_data: *mut c_void