pub type SHA_CTX = sha_state_st;
struct SHA_CTX { pub h: [u32; 5], pub Nl: u32, pub Nh: u32, pub data: [u8; 64], pub num: u32, }
h: [u32; 5]
Nl: u32
Nh: u32
data: [u8; 64]
num: u32