use ffi;
use std::fmt;
use std::ptr;
use std::mem;
use libc::{c_int, c_void, c_char};
use foreign_types::ForeignTypeRef;
use {cvt, cvt_p, cvt_n};
use bn::{BigNum, BigNumRef};
use bio::MemBioSlice;
use error::ErrorStack;
use util::{CallbackState, invoke_passwd_cb_old};
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub struct Padding(c_int);
impl Padding {
pub fn from_raw(value: c_int) -> Padding {
Padding(value)
}
pub fn as_raw(&self) -> c_int {
self.0
}
}
pub const NO_PADDING: Padding = Padding(ffi::RSA_NO_PADDING);
pub const PKCS1_PADDING: Padding = Padding(ffi::RSA_PKCS1_PADDING);
pub const PKCS1_OAEP_PADDING: Padding = Padding(ffi::RSA_PKCS1_OAEP_PADDING);
foreign_type! {
type CType = ffi::RSA;
fn drop = ffi::RSA_free;
pub struct Rsa;
pub struct RsaRef;
}
impl RsaRef {
private_key_to_pem!(ffi::PEM_write_bio_RSAPrivateKey);
public_key_to_pem!(ffi::PEM_write_bio_RSA_PUBKEY);
private_key_to_der!(ffi::i2d_RSAPrivateKey);
public_key_to_der!(ffi::i2d_RSA_PUBKEY);
pub fn size(&self) -> usize {
unsafe {
assert!(self.n().is_some());
ffi::RSA_size(self.as_ptr()) as usize
}
}
pub fn private_decrypt(&self,
from: &[u8],
to: &mut [u8],
padding: Padding)
-> Result<usize, ErrorStack> {
assert!(self.d().is_some(), "private components missing");
assert!(from.len() <= i32::max_value() as usize);
assert!(to.len() >= self.size());
unsafe {
let len = try!(cvt_n(ffi::RSA_private_decrypt(from.len() as c_int,
from.as_ptr(),
to.as_mut_ptr(),
self.as_ptr(),
padding.0)));
Ok(len as usize)
}
}
pub fn private_encrypt(&self,
from: &[u8],
to: &mut [u8],
padding: Padding)
-> Result<usize, ErrorStack> {
assert!(self.d().is_some(), "private components missing");
assert!(from.len() <= i32::max_value() as usize);
assert!(to.len() >= self.size());
unsafe {
let len = try!(cvt_n(ffi::RSA_private_encrypt(from.len() as c_int,
from.as_ptr(),
to.as_mut_ptr(),
self.as_ptr(),
padding.0)));
Ok(len as usize)
}
}
pub fn public_decrypt(&self,
from: &[u8],
to: &mut [u8],
padding: Padding)
-> Result<usize, ErrorStack> {
assert!(from.len() <= i32::max_value() as usize);
assert!(to.len() >= self.size());
unsafe {
let len = try!(cvt_n(ffi::RSA_public_decrypt(from.len() as c_int,
from.as_ptr(),
to.as_mut_ptr(),
self.as_ptr(),
padding.0)));
Ok(len as usize)
}
}
pub fn public_encrypt(&self,
from: &[u8],
to: &mut [u8],
padding: Padding)
-> Result<usize, ErrorStack> {
assert!(from.len() <= i32::max_value() as usize);
assert!(to.len() >= self.size());
unsafe {
let len = try!(cvt_n(ffi::RSA_public_encrypt(from.len() as c_int,
from.as_ptr(),
to.as_mut_ptr(),
self.as_ptr(),
padding.0)));
Ok(len as usize)
}
}
pub fn n(&self) -> Option<&BigNumRef> {
unsafe {
let n = compat::key(self.as_ptr())[0];
if n.is_null() {
None
} else {
Some(BigNumRef::from_ptr(n as *mut _))
}
}
}
pub fn d(&self) -> Option<&BigNumRef> {
unsafe {
let d = compat::key(self.as_ptr())[2];
if d.is_null() {
None
} else {
Some(BigNumRef::from_ptr(d as *mut _))
}
}
}
pub fn e(&self) -> Option<&BigNumRef> {
unsafe {
let e = compat::key(self.as_ptr())[1];
if e.is_null() {
None
} else {
Some(BigNumRef::from_ptr(e as *mut _))
}
}
}
pub fn p(&self) -> Option<&BigNumRef> {
unsafe {
let p = compat::factors(self.as_ptr())[0];
if p.is_null() {
None
} else {
Some(BigNumRef::from_ptr(p as *mut _))
}
}
}
pub fn q(&self) -> Option<&BigNumRef> {
unsafe {
let q = compat::factors(self.as_ptr())[1];
if q.is_null() {
None
} else {
Some(BigNumRef::from_ptr(q as *mut _))
}
}
}
}
impl Rsa {
pub fn from_public_components(n: BigNum, e: BigNum) -> Result<Rsa, ErrorStack> {
unsafe {
let rsa = Rsa(try!(cvt_p(ffi::RSA_new())));
try!(cvt(compat::set_key(rsa.0,
n.as_ptr(),
e.as_ptr(),
ptr::null_mut())));
mem::forget((n, e));
Ok(rsa)
}
}
pub fn from_private_components(n: BigNum,
e: BigNum,
d: BigNum,
p: BigNum,
q: BigNum,
dp: BigNum,
dq: BigNum,
qi: BigNum)
-> Result<Rsa, ErrorStack> {
unsafe {
let rsa = Rsa(try!(cvt_p(ffi::RSA_new())));
try!(cvt(compat::set_key(rsa.0, n.as_ptr(), e.as_ptr(), d.as_ptr())));
mem::forget((n, e, d));
try!(cvt(compat::set_factors(rsa.0, p.as_ptr(), q.as_ptr())));
mem::forget((p, q));
try!(cvt(compat::set_crt_params(rsa.0, dp.as_ptr(), dq.as_ptr(),
qi.as_ptr())));
mem::forget((dp, dq, qi));
Ok(rsa)
}
}
pub fn generate(bits: u32) -> Result<Rsa, ErrorStack> {
ffi::init();
unsafe {
let rsa = Rsa(try!(cvt_p(ffi::RSA_new())));
let e = try!(BigNum::from_u32(ffi::RSA_F4 as u32));
try!(cvt(ffi::RSA_generate_key_ex(rsa.0, bits as c_int, e.as_ptr(), ptr::null_mut())));
Ok(rsa)
}
}
private_key_from_pem!(Rsa, ffi::PEM_read_bio_RSAPrivateKey);
private_key_from_der!(Rsa, ffi::d2i_RSAPrivateKey);
public_key_from_pem!(Rsa, ffi::PEM_read_bio_RSA_PUBKEY);
public_key_from_der!(Rsa, ffi::d2i_RSA_PUBKEY);
#[deprecated(since = "0.9.2", note = "use private_key_from_pem_callback")]
pub fn private_key_from_pem_cb<F>(buf: &[u8], pass_cb: F) -> Result<Rsa, ErrorStack>
where F: FnOnce(&mut [c_char]) -> usize
{
ffi::init();
let mut cb = CallbackState::new(pass_cb);
let mem_bio = try!(MemBioSlice::new(buf));
unsafe {
let cb_ptr = &mut cb as *mut _ as *mut c_void;
let rsa = try!(cvt_p(ffi::PEM_read_bio_RSAPrivateKey(mem_bio.as_ptr(),
ptr::null_mut(),
Some(invoke_passwd_cb_old::<F>),
cb_ptr)));
Ok(Rsa(rsa))
}
}
}
impl fmt::Debug for Rsa {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Rsa")
}
}
#[cfg(ossl110)]
mod compat {
use std::ptr;
use ffi::{self, BIGNUM, RSA};
use libc::c_int;
pub unsafe fn key(r: *const RSA) -> [*const BIGNUM; 3] {
let (mut n, mut e, mut d) = (ptr::null(), ptr::null(), ptr::null());
ffi::RSA_get0_key(r, &mut n, &mut e, &mut d);
[n, e, d]
}
pub unsafe fn factors(r: *const RSA) -> [*const BIGNUM; 2] {
let (mut p, mut q) = (ptr::null(), ptr::null());
ffi::RSA_get0_factors(r, &mut p, &mut q);
[p, q]
}
pub unsafe fn set_key(r: *mut RSA, n: *mut BIGNUM, e: *mut BIGNUM, d: *mut BIGNUM) -> c_int {
ffi::RSA_set0_key(r, n, e, d)
}
pub unsafe fn set_factors(r: *mut RSA, p: *mut BIGNUM, q: *mut BIGNUM) -> c_int {
ffi::RSA_set0_factors(r, p, q)
}
pub unsafe fn set_crt_params(r: *mut RSA,
dmp1: *mut BIGNUM,
dmq1: *mut BIGNUM,
iqmp: *mut BIGNUM)
-> c_int {
ffi::RSA_set0_crt_params(r, dmp1, dmq1, iqmp)
}
}
#[cfg(ossl10x)]
mod compat {
use libc::c_int;
use ffi::{BIGNUM, RSA};
pub unsafe fn key(r: *const RSA) -> [*const BIGNUM; 3] {
[(*r).n, (*r).e, (*r).d]
}
pub unsafe fn factors(r: *const RSA) -> [*const BIGNUM; 2] {
[(*r).p, (*r).q]
}
pub unsafe fn set_key(r: *mut RSA, n: *mut BIGNUM, e: *mut BIGNUM, d: *mut BIGNUM) -> c_int {
(*r).n = n;
(*r).e = e;
(*r).d = d;
1 }
pub unsafe fn set_factors(r: *mut RSA, p: *mut BIGNUM, q: *mut BIGNUM) -> c_int {
(*r).p = p;
(*r).q = q;
1 }
pub unsafe fn set_crt_params(r: *mut RSA,
dmp1: *mut BIGNUM,
dmq1: *mut BIGNUM,
iqmp: *mut BIGNUM)
-> c_int {
(*r).dmp1 = dmp1;
(*r).dmq1 = dmq1;
(*r).iqmp = iqmp;
1 }
}
#[cfg(test)]
mod test {
use symm::Cipher;
use super::*;
#[test]
fn test_from_password() {
let key = include_bytes!("../test/rsa-encrypted.pem");
Rsa::private_key_from_pem_passphrase(key, b"mypass").unwrap();
}
#[test]
fn test_from_password_callback() {
let mut password_queried = false;
let key = include_bytes!("../test/rsa-encrypted.pem");
Rsa::private_key_from_pem_callback(key, |password| {
password_queried = true;
password[..6].copy_from_slice(b"mypass");
Ok(6)
})
.unwrap();
assert!(password_queried);
}
#[test]
fn test_to_password() {
let key = Rsa::generate(2048).unwrap();
let pem = key.private_key_to_pem_passphrase(Cipher::aes_128_cbc(), b"foobar").unwrap();
Rsa::private_key_from_pem_passphrase(&pem, b"foobar").unwrap();
assert!(Rsa::private_key_from_pem_passphrase(&pem, b"fizzbuzz").is_err());
}
#[test]
fn test_public_encrypt_private_decrypt_with_padding() {
let key = include_bytes!("../test/rsa.pem.pub");
let public_key = Rsa::public_key_from_pem(key).unwrap();
let mut result = vec![0; public_key.size()];
let original_data = b"This is test";
let len = public_key.public_encrypt(original_data, &mut result, PKCS1_PADDING).unwrap();
assert_eq!(len, 256);
let pkey = include_bytes!("../test/rsa.pem");
let private_key = Rsa::private_key_from_pem(pkey).unwrap();
let mut dec_result = vec![0; private_key.size()];
let len = private_key.private_decrypt(&result, &mut dec_result, PKCS1_PADDING).unwrap();
assert_eq!(&dec_result[..len], original_data);
}
#[test]
fn test_private_encrypt() {
let k0 = super::Rsa::generate(512).unwrap();
let k0pkey = k0.public_key_to_pem().unwrap();
let k1 = super::Rsa::public_key_from_pem(&k0pkey).unwrap();
let msg = vec![0xdeu8, 0xadu8, 0xd0u8, 0x0du8];
let mut emesg = vec![0; k0.size()];
k0.private_encrypt(&msg, &mut emesg, PKCS1_PADDING).unwrap();
let mut dmesg = vec![0; k1.size()];
let len = k1.public_decrypt(&emesg, &mut dmesg, PKCS1_PADDING).unwrap();
assert_eq!(msg, &dmesg[..len]);
}
#[test]
fn test_public_encrypt() {
let k0 = super::Rsa::generate(512).unwrap();
let k0pkey = k0.private_key_to_pem().unwrap();
let k1 = super::Rsa::private_key_from_pem(&k0pkey).unwrap();
let msg = vec![0xdeu8, 0xadu8, 0xd0u8, 0x0du8];
let mut emesg = vec![0; k0.size()];
k0.public_encrypt(&msg, &mut emesg, PKCS1_PADDING).unwrap();
let mut dmesg = vec![0; k1.size()];
let len = k1.private_decrypt(&emesg, &mut dmesg, PKCS1_PADDING).unwrap();
assert_eq!(msg, &dmesg[..len]);
}
}