338 lines
12 KiB
Rust
338 lines
12 KiB
Rust
use ffi;
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use std::fmt;
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use std::ptr;
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use std::mem;
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use libc::{c_int, c_void, c_char, c_ulong};
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use bn::{BigNum, BigNumRef};
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use bio::{MemBio, MemBioSlice};
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use error::ErrorStack;
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use HashTypeInternals;
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use crypto::hash;
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use crypto::util::{CallbackState, invoke_passwd_cb};
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pub struct RSA(*mut ffi::RSA);
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impl Drop for RSA {
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fn drop(&mut self) {
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unsafe {
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ffi::RSA_free(self.0);
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}
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}
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}
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impl RSA {
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/// only useful for associating the key material directly with the key, it's safer to use
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/// the supplied load and save methods for DER formatted keys.
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pub fn from_public_components(n: BigNum, e: BigNum) -> Result<RSA, ErrorStack> {
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unsafe {
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let rsa = try_ssl_null!(ffi::RSA_new());
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(*rsa).n = n.as_ptr();
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(*rsa).e = e.as_ptr();
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mem::forget(n);
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mem::forget(e);
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Ok(RSA(rsa))
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}
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}
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pub fn from_private_components(n: BigNum,
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e: BigNum,
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d: BigNum,
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p: BigNum,
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q: BigNum,
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dp: BigNum,
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dq: BigNum,
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qi: BigNum)
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-> Result<RSA, ErrorStack> {
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unsafe {
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let rsa = try_ssl_null!(ffi::RSA_new());
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(*rsa).n = n.as_ptr();
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(*rsa).e = e.as_ptr();
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(*rsa).d = d.as_ptr();
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(*rsa).p = p.as_ptr();
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(*rsa).q = q.as_ptr();
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(*rsa).dmp1 = dp.as_ptr();
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(*rsa).dmq1 = dq.as_ptr();
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(*rsa).iqmp = qi.as_ptr();
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mem::forget(n);
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mem::forget(e);
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mem::forget(d);
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mem::forget(p);
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mem::forget(q);
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mem::forget(dp);
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mem::forget(dq);
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mem::forget(qi);
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Ok(RSA(rsa))
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}
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}
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pub unsafe fn from_ptr(rsa: *mut ffi::RSA) -> RSA {
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RSA(rsa)
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}
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/// Generates a public/private key pair with the specified size.
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///
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/// The public exponent will be 65537.
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pub fn generate(bits: u32) -> Result<RSA, ErrorStack> {
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unsafe {
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let rsa = try_ssl_null!(ffi::RSA_new());
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let rsa = RSA(rsa);
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let e = try!(BigNum::new_from(ffi::RSA_F4 as c_ulong));
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try_ssl!(ffi::RSA_generate_key_ex(rsa.0, bits as c_int, e.as_ptr(), ptr::null_mut()));
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Ok(rsa)
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}
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}
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/// Reads an RSA private key from PEM formatted data.
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pub fn private_key_from_pem(buf: &[u8]) -> Result<RSA, ErrorStack> {
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let mem_bio = try!(MemBioSlice::new(buf));
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unsafe {
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let rsa = try_ssl_null!(ffi::PEM_read_bio_RSAPrivateKey(mem_bio.as_ptr(),
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ptr::null_mut(),
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None,
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ptr::null_mut()));
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Ok(RSA(rsa))
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}
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}
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/// Reads an RSA private key from PEM formatted data and supplies a password callback.
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pub fn private_key_from_pem_cb<F>(buf: &[u8], pass_cb: F) -> Result<RSA, ErrorStack>
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where F: FnOnce(&mut [c_char]) -> usize
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{
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let mut cb = CallbackState::new(pass_cb);
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let mem_bio = try!(MemBioSlice::new(buf));
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unsafe {
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let cb_ptr = &mut cb as *mut _ as *mut c_void;
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let rsa = try_ssl_null!(ffi::PEM_read_bio_RSAPrivateKey(mem_bio.as_ptr(),
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ptr::null_mut(),
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Some(invoke_passwd_cb::<F>),
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cb_ptr));
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Ok(RSA(rsa))
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}
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}
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/// Reads an RSA public key from PEM formatted data.
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pub fn public_key_from_pem(buf: &[u8]) -> Result<RSA, ErrorStack> {
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let mem_bio = try!(MemBioSlice::new(buf));
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unsafe {
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let rsa = try_ssl_null!(ffi::PEM_read_bio_RSA_PUBKEY(mem_bio.as_ptr(),
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ptr::null_mut(),
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None,
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ptr::null_mut()));
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Ok(RSA(rsa))
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}
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}
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/// Writes an RSA private key as unencrypted PEM formatted data
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pub fn private_key_to_pem(&self) -> Result<Vec<u8>, ErrorStack> {
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let mem_bio = try!(MemBio::new());
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unsafe {
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try_ssl!(ffi::PEM_write_bio_RSAPrivateKey(mem_bio.as_ptr(),
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self.0,
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ptr::null(),
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ptr::null_mut(),
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0,
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None,
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ptr::null_mut()));
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}
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Ok(mem_bio.get_buf().to_owned())
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}
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/// Writes an RSA public key as PEM formatted data
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pub fn public_key_to_pem(&self) -> Result<Vec<u8>, ErrorStack> {
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let mem_bio = try!(MemBio::new());
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unsafe {
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try_ssl!(ffi::PEM_write_bio_RSA_PUBKEY(mem_bio.as_ptr(), self.0))
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};
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Ok(mem_bio.get_buf().to_owned())
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}
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pub fn size(&self) -> Option<u32> {
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if self.n().is_some() {
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unsafe { Some(ffi::RSA_size(self.0) as u32) }
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} else {
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None
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}
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}
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pub fn sign(&self, hash: hash::Type, message: &[u8]) -> Result<Vec<u8>, ErrorStack> {
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let k_len = self.size().expect("RSA missing an n");
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let mut sig = vec![0; k_len as usize];
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let mut sig_len = k_len;
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unsafe {
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try_ssl!(ffi::RSA_sign(hash.as_nid() as c_int,
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message.as_ptr(),
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message.len() as u32,
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sig.as_mut_ptr(),
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&mut sig_len,
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self.0));
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assert!(sig_len == k_len);
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Ok(sig)
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}
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}
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pub fn verify(&self, hash: hash::Type, message: &[u8], sig: &[u8]) -> Result<(), ErrorStack> {
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unsafe {
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try_ssl!(ffi::RSA_verify(hash.as_nid() as c_int,
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message.as_ptr(),
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message.len() as u32,
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sig.as_ptr(),
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sig.len() as u32,
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self.0));
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}
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Ok(())
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}
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pub fn as_ptr(&self) -> *mut ffi::RSA {
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self.0
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}
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pub fn n<'a>(&'a self) -> Option<BigNumRef<'a>> {
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unsafe {
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let n = (*self.0).n;
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if n.is_null() {
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None
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} else {
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Some(BigNumRef::from_ptr(n))
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}
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}
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}
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pub fn d<'a>(&self) -> Option<BigNumRef<'a>> {
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unsafe {
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let d = (*self.0).d;
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if d.is_null() {
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None
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} else {
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Some(BigNumRef::from_ptr(d))
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}
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}
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}
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pub fn e<'a>(&'a self) -> Option<BigNumRef<'a>> {
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unsafe {
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let e = (*self.0).e;
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if e.is_null() {
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None
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} else {
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Some(BigNumRef::from_ptr(e))
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}
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}
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}
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pub fn p<'a>(&'a self) -> Option<BigNumRef<'a>> {
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unsafe {
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let p = (*self.0).p;
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if p.is_null() {
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None
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} else {
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Some(BigNumRef::from_ptr(p))
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}
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}
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}
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pub fn q<'a>(&'a self) -> Option<BigNumRef<'a>> {
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unsafe {
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let q = (*self.0).q;
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if q.is_null() {
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None
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} else {
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Some(BigNumRef::from_ptr(q))
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}
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}
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}
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}
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impl fmt::Debug for RSA {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "RSA")
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}
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}
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#[cfg(test)]
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mod test {
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use std::io::Write;
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use libc::c_char;
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use super::*;
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use crypto::hash::*;
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fn signing_input_rs256() -> Vec<u8> {
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vec![101, 121, 74, 104, 98, 71, 99, 105, 79, 105, 74, 83, 85, 122, 73, 49, 78, 105, 74, 57,
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46, 101, 121, 74, 112, 99, 51, 77, 105, 79, 105, 74, 113, 98, 50, 85, 105, 76, 65, 48,
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75, 73, 67, 74, 108, 101, 72, 65, 105, 79, 106, 69, 122, 77, 68, 65, 52, 77, 84, 107,
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122, 79, 68, 65, 115, 68, 81, 111, 103, 73, 109, 104, 48, 100, 72, 65, 54, 76, 121,
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57, 108, 101, 71, 70, 116, 99, 71, 120, 108, 76, 109, 78, 118, 98, 83, 57, 112, 99,
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49, 57, 121, 98, 50, 57, 48, 73, 106, 112, 48, 99, 110, 86, 108, 102, 81]
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}
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fn signature_rs256() -> Vec<u8> {
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vec![112, 46, 33, 137, 67, 232, 143, 209, 30, 181, 216, 45, 191, 120, 69, 243, 65, 6, 174,
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27, 129, 255, 247, 115, 17, 22, 173, 209, 113, 125, 131, 101, 109, 66, 10, 253, 60,
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150, 238, 221, 115, 162, 102, 62, 81, 102, 104, 123, 0, 11, 135, 34, 110, 1, 135, 237,
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16, 115, 249, 69, 229, 130, 173, 252, 239, 22, 216, 90, 121, 142, 232, 198, 109, 219,
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61, 184, 151, 91, 23, 208, 148, 2, 190, 237, 213, 217, 217, 112, 7, 16, 141, 178, 129,
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96, 213, 248, 4, 12, 167, 68, 87, 98, 184, 31, 190, 127, 249, 217, 46, 10, 231, 111,
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36, 242, 91, 51, 187, 230, 244, 74, 230, 30, 177, 4, 10, 203, 32, 4, 77, 62, 249, 18,
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142, 212, 1, 48, 121, 91, 212, 189, 59, 65, 238, 202, 208, 102, 171, 101, 25, 129,
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253, 228, 141, 247, 127, 55, 45, 195, 139, 159, 175, 221, 59, 239, 177, 139, 93, 163,
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204, 60, 46, 176, 47, 158, 58, 65, 214, 18, 202, 173, 21, 145, 18, 115, 160, 95, 35,
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185, 232, 56, 250, 175, 132, 157, 105, 132, 41, 239, 90, 30, 136, 121, 130, 54, 195,
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212, 14, 96, 69, 34, 165, 68, 200, 242, 122, 122, 45, 184, 6, 99, 209, 108, 247, 202,
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234, 86, 222, 64, 92, 178, 33, 90, 69, 178, 194, 85, 102, 181, 90, 193, 167, 72, 160,
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112, 223, 200, 163, 42, 70, 149, 67, 208, 25, 238, 251, 71]
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}
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#[test]
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pub fn test_sign() {
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let key = include_bytes!("../../test/rsa.pem");
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let private_key = RSA::private_key_from_pem(key).unwrap();
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let mut sha = Hasher::new(Type::SHA256).unwrap();
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sha.write_all(&signing_input_rs256()).unwrap();
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let digest = sha.finish().unwrap();
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let result = private_key.sign(Type::SHA256, &digest).unwrap();
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assert_eq!(result, signature_rs256());
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}
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#[test]
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pub fn test_verify() {
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let key = include_bytes!("../../test/rsa.pem.pub");
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let public_key = RSA::public_key_from_pem(key).unwrap();
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let mut sha = Hasher::new(Type::SHA256).unwrap();
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sha.write_all(&signing_input_rs256()).unwrap();
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let digest = sha.finish().unwrap();
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assert!(public_key.verify(Type::SHA256, &digest, &signature_rs256()).is_ok());
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}
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#[test]
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pub fn test_password() {
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let mut password_queried = false;
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let key = include_bytes!("../../test/rsa-encrypted.pem");
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RSA::private_key_from_pem_cb(key, |password| {
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password_queried = true;
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password[0] = b'm' as c_char;
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password[1] = b'y' as c_char;
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password[2] = b'p' as c_char;
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password[3] = b'a' as c_char;
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password[4] = b's' as c_char;
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password[5] = b's' as c_char;
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6
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}).unwrap();
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assert!(password_queried);
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}
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}
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