Flatten crypto module

1 files changed, 487 insertions, 0 deletions

diff --git a/openssl/src/rsa.rs b/openssl/src/rsa.rs
new file mode 100644
index 00000000..b8702f97
--- /dev/null
+++ b/openssl/src/rsa.rs
@@ -0,0 +1,487 @@
+use ffi;
+use std::fmt;
+use std::ptr;
+use std::mem;
+use libc::{c_int, c_void, c_char};
+
+use {cvt, cvt_p, cvt_n};
+use bn::{BigNum, BigNumRef};
+use bio::{MemBio, MemBioSlice};
+use error::ErrorStack;
+use util::{CallbackState, invoke_passwd_cb};
+
+/// Type of encryption padding to use.
+#[derive(Copy, Clone)]
+pub struct Padding(c_int);
+
+impl Padding {
+    pub fn none() -> Padding {
+        Padding(ffi::RSA_NO_PADDING)
+    }
+
+    pub fn pkcs1() -> Padding {
+        Padding(ffi::RSA_PKCS1_PADDING)
+    }
+
+    pub fn pkcs1_oaep() -> Padding {
+        Padding(ffi::RSA_PKCS1_OAEP_PADDING)
+    }
+}
+
+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, 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 unsafe fn from_ptr(rsa: *mut ffi::RSA) -> RSA {
+        RSA(rsa)
+    }
+
+    /// Generates a public/private key pair with the specified size.
+    ///
+    /// The public exponent will be 65537.
+    pub fn generate(bits: u32) -> Result<RSA, ErrorStack> {
+        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)
+        }
+    }
+
+    /// Reads an RSA private key from PEM formatted data.
+    pub fn private_key_from_pem(buf: &[u8]) -> Result<RSA, ErrorStack> {
+        let mem_bio = try!(MemBioSlice::new(buf));
+        unsafe {
+            let rsa = try!(cvt_p(ffi::PEM_read_bio_RSAPrivateKey(mem_bio.as_ptr(),
+                                                                 ptr::null_mut(),
+                                                                 None,
+                                                                 ptr::null_mut())));
+            Ok(RSA(rsa))
+        }
+    }
+
+    /// Reads an RSA private key from PEM formatted data and supplies a password callback.
+    pub fn private_key_from_pem_cb<F>(buf: &[u8], pass_cb: F) -> Result<RSA, ErrorStack>
+        where F: FnOnce(&mut [c_char]) -> usize
+    {
+        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::<F>),
+                                                                 cb_ptr)));
+            Ok(RSA(rsa))
+        }
+    }
+
+    /// Reads an RSA public key from PEM formatted data.
+    pub fn public_key_from_pem(buf: &[u8]) -> Result<RSA, ErrorStack> {
+        let mem_bio = try!(MemBioSlice::new(buf));
+        unsafe {
+            let rsa = try!(cvt_p(ffi::PEM_read_bio_RSA_PUBKEY(mem_bio.as_ptr(),
+                                                              ptr::null_mut(),
+                                                              None,
+                                                              ptr::null_mut())));
+            Ok(RSA(rsa))
+        }
+    }
+
+    /// Writes an RSA private key as unencrypted PEM formatted data
+    pub fn private_key_to_pem(&self) -> Result<Vec<u8>, ErrorStack> {
+        let mem_bio = try!(MemBio::new());
+
+        unsafe {
+            try!(cvt(ffi::PEM_write_bio_RSAPrivateKey(mem_bio.as_ptr(),
+                                                      self.0,
+                                                      ptr::null(),
+                                                      ptr::null_mut(),
+                                                      0,
+                                                      None,
+                                                      ptr::null_mut())));
+        }
+        Ok(mem_bio.get_buf().to_owned())
+    }
+
+    /// Writes an RSA public key as PEM formatted data
+    pub fn public_key_to_pem(&self) -> Result<Vec<u8>, ErrorStack> {
+        let mem_bio = try!(MemBio::new());
+
+        unsafe {
+            try!(cvt(ffi::PEM_write_bio_RSA_PUBKEY(mem_bio.as_ptr(), self.0)));
+        }
+
+        Ok(mem_bio.get_buf().to_owned())
+    }
+
+    pub fn size(&self) -> usize {
+        unsafe {
+            assert!(self.n().is_some());
+
+            ffi::RSA_size(self.0) as usize
+        }
+    }
+
+    /// Decrypts data using the private key, returning the number of decrypted bytes.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `self` has no private components, or if `to` is smaller
+    /// than `self.size()`.
+    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.0,
+                                                          padding.0)));
+           Ok(len as usize)
+        }
+    }
+
+    /// Encrypts data using the private key, returning the number of encrypted bytes.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `self` has no private components, or if `to` is smaller
+    /// than `self.size()`.
+    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.0,
+                                                          padding.0)));
+           Ok(len as usize)
+        }
+    }
+
+    /// Decrypts data using the public key, returning the number of decrypted bytes.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `to` is smaller than `self.size()`.
+    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.0,
+                                                         padding.0)));
+            Ok(len as usize)
+        }
+    }
+
+    /// Encrypts data using the private key, returning the number of encrypted bytes.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `to` is smaller than `self.size()`.
+    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.0,
+                                                         padding.0)));
+            Ok(len as usize)
+        }
+    }
+
+    pub fn as_ptr(&self) -> *mut ffi::RSA {
+        self.0
+    }
+
+    pub fn n(&self) -> Option<&BigNumRef> {
+        unsafe {
+            let n = compat::key(self.0)[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.0)[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.0)[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.0)[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.0)[1];
+            if q.is_null() {
+                None
+            } else {
+                Some(BigNumRef::from_ptr(q as *mut _))
+            }
+        }
+    }
+}
+
+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 // TODO: is this right? should it be 0? what's success?
+    }
+
+    pub unsafe fn set_factors(r: *mut RSA,
+                              p: *mut BIGNUM,
+                              q: *mut BIGNUM) -> c_int {
+        (*r).p = p;
+        (*r).q = q;
+        1 // TODO: is this right? should it be 0? what's success?
+    }
+
+    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 // TODO: is this right? should it be 0? what's success?
+    }
+}
+
+
+#[cfg(test)]
+mod test {
+    use libc::c_char;
+
+    use super::*;
+
+    #[test]
+    pub fn test_password() {
+        let mut password_queried = false;
+        let key = include_bytes!("../test/rsa-encrypted.pem");
+        RSA::private_key_from_pem_cb(key, |password| {
+            password_queried = true;
+            password[0] = b'm' as c_char;
+            password[1] = b'y' as c_char;
+            password[2] = b'p' as c_char;
+            password[3] = b'a' as c_char;
+            password[4] = b's' as c_char;
+            password[5] = b's' as c_char;
+            6
+        }).unwrap();
+
+        assert!(password_queried);
+    }
+
+    #[test]
+    pub 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, Padding::pkcs1()).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, Padding::pkcs1()).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, Padding::pkcs1()).unwrap();
+        let mut dmesg = vec![0; k1.size()];
+        let len = k1.public_decrypt(&emesg, &mut dmesg, Padding::pkcs1()).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, Padding::pkcs1()).unwrap();
+       let mut dmesg = vec![0; k1.size()];
+       let len = k1.private_decrypt(&emesg, &mut dmesg, Padding::pkcs1()).unwrap();
+       assert_eq!(msg, &dmesg[..len]);
+   }
+
+}