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use ffi;
use std::fmt;
use ssl::error::{SslError, StreamError};
use std::ptr;
use std::io::{self, Read};
use bn::BigNum;
use bio::MemBio;
pub struct RSA(*mut ffi::RSA);
impl Drop for RSA {
fn drop(&mut self) {
unsafe {
ffi::RSA_free(self.0);
}
}
}
impl RSA {
/// only useful for associating the key material directly with the key, it's safer to use
/// the supplied load and save methods for DER formatted keys.
pub fn from_public_components(n: BigNum, e: BigNum) -> Result<RSA, SslError> {
unsafe {
let rsa = try_ssl_null!(ffi::RSA_new());
(*rsa).n = n.into_raw();
(*rsa).e = e.into_raw();
Ok(RSA(rsa))
}
}
pub fn from_private_components(n: BigNum, e: BigNum, d: BigNum, p: BigNum, q: BigNum, dp: BigNum, dq: BigNum, qi: BigNum) -> Result<RSA, SslError> {
unsafe {
let rsa = try_ssl_null!(ffi::RSA_new());
(*rsa).n = n.into_raw();
(*rsa).e = e.into_raw();
(*rsa).d = d.into_raw();
(*rsa).p = p.into_raw();
(*rsa).q = q.into_raw();
(*rsa).dmp1 = dp.into_raw();
(*rsa).dmq1 = dq.into_raw();
(*rsa).iqmp = qi.into_raw();
Ok(RSA(rsa))
}
}
/// the caller should assert that the rsa pointer is valid.
pub unsafe fn from_raw(rsa: *mut ffi::RSA) -> RSA {
RSA(rsa)
}
/// Reads an RSA private key from PEM formatted data.
pub fn private_key_from_pem<R>(reader: &mut R) -> Result<RSA, SslError>
where R: Read
{
let mut mem_bio = try!(MemBio::new());
try!(io::copy(reader, &mut mem_bio).map_err(StreamError));
unsafe {
let rsa = try_ssl_null!(ffi::PEM_read_bio_RSAPrivateKey(mem_bio.get_handle(),
ptr::null_mut(),
None,
ptr::null_mut()));
Ok(RSA(rsa))
}
}
/// Reads an RSA public key from PEM formatted data.
pub fn public_key_from_pem<R>(reader: &mut R) -> Result<RSA, SslError>
where R: Read
{
let mut mem_bio = try!(MemBio::new());
try!(io::copy(reader, &mut mem_bio).map_err(StreamError));
unsafe {
let rsa = try_ssl_null!(ffi::PEM_read_bio_RSA_PUBKEY(mem_bio.get_handle(),
ptr::null_mut(),
None,
ptr::null_mut()));
Ok(RSA(rsa))
}
}
pub fn size(&self) -> Result<u32, SslError> {
if self.has_n() {
unsafe {
Ok(ffi::RSA_size(self.0) as u32)
}
} else {
Err(SslError::OpenSslErrors(vec![]))
}
}
pub fn sign(&self, hash_id: i32, message: &[u8]) -> Result<Vec<u8>, SslError> {
// RSA_sign(t: c_int, m: *const u8, mlen: c_uint, sig: *mut u8, siglen: *mut c_uint, k: *mut RSA) -> c_int
let k_len = try!(self.size());
let mut sig = vec![0;k_len as usize];
let mut sig_len = k_len;
unsafe {
let result = ffi::RSA_sign(hash_id, message.as_ptr(), message.len() as u32, sig.as_mut_ptr(), &mut sig_len, self.0);
assert!(sig_len == k_len);
if result == 1 {
Ok(sig)
} else {
Err(SslError::OpenSslErrors(vec![]))
}
}
}
pub fn verify(&self, hash_id: i32, message: &[u8], sig: &[u8]) -> Result<bool, SslError> {
unsafe {
let result = ffi::RSA_verify(hash_id, message.as_ptr(), message.len() as u32, sig.as_ptr(), sig.len() as u32, self.0);
Ok(result == 1)
}
}
pub fn as_ptr(&self) -> *mut ffi::RSA {
self.0
}
// The following getters are unsafe, since BigNum::new_from_ffi fails upon null pointers
pub fn n(&self) -> Result<BigNum, SslError> {
unsafe {
BigNum::new_from_ffi((*self.0).n)
}
}
pub fn has_n(&self) -> bool {
unsafe {
!(*self.0).n.is_null()
}
}
pub fn d(&self) -> Result<BigNum, SslError> {
unsafe {
BigNum::new_from_ffi((*self.0).d)
}
}
pub fn e(&self) -> Result<BigNum, SslError> {
unsafe {
BigNum::new_from_ffi((*self.0).e)
}
}
pub fn has_e(&self) -> bool {
unsafe {
!(*self.0).e.is_null()
}
}
pub fn p(&self) -> Result<BigNum, SslError> {
unsafe {
BigNum::new_from_ffi((*self.0).p)
}
}
pub fn q(&self) -> Result<BigNum, SslError> {
unsafe {
BigNum::new_from_ffi((*self.0).q)
}
}
}
impl fmt::Debug for RSA {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "RSA")
}
}
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