diff --git a/openssl/src/bn/mod.rs b/openssl/src/bn/mod.rs
index 3a5f231e..4b93690f 100644
--- a/openssl/src/bn/mod.rs
+++ b/openssl/src/bn/mod.rs
@@ -1,5 +1,5 @@
 use libc::{c_int, c_ulong, c_void};
-use std::ffi::{CString, c_str_to_bytes};
+use std::ffi::{CStr, CString};
 use std::cmp::Ordering;
 use std::{fmt, ptr};
 
@@ -88,7 +88,7 @@ impl BigNum {
 
     pub fn from_dec_str(s: &str) -> Result<BigNum, SslError> {
         BigNum::new().and_then(|v| unsafe {
-            let c_str = CString::from_slice(s.as_bytes());
+            let c_str = CString::new(s.as_bytes()).unwrap();
             try_ssl!(ffi::BN_dec2bn(v.raw_ptr(), c_str.as_ptr()));
             Ok(v)
         })
@@ -96,7 +96,7 @@ impl BigNum {
 
     pub fn from_hex_str(s: &str) -> Result<BigNum, SslError> {
         BigNum::new().and_then(|v| unsafe {
-            let c_str = CString::from_slice(s.as_bytes());
+            let c_str = CString::new(s.as_bytes()).unwrap();
             try_ssl!(ffi::BN_hex2bn(v.raw_ptr(), c_str.as_ptr()));
             Ok(v)
         })
@@ -421,7 +421,7 @@ impl BigNum {
         unsafe {
             let buf = ffi::BN_bn2dec(self.raw());
             assert!(!buf.is_null());
-            let str = String::from_utf8(c_str_to_bytes(&buf).to_vec()).unwrap();
+            let str = String::from_utf8(CStr::from_ptr(buf).to_bytes().to_vec()).unwrap();
             ffi::CRYPTO_free(buf as *mut c_void);
             str
         }
@@ -431,7 +431,7 @@ impl BigNum {
         unsafe {
             let buf = ffi::BN_bn2hex(self.raw());
             assert!(!buf.is_null());
-            let str = String::from_utf8(c_str_to_bytes(&buf).to_vec()).unwrap();
+            let str = String::from_utf8(CStr::from_ptr(buf).to_bytes().to_vec()).unwrap();
             ffi::CRYPTO_free(buf as *mut c_void);
             str
         }
diff --git a/openssl/src/crypto/hmac.rs b/openssl/src/crypto/hmac.rs
index b7d5df54..55007ceb 100644
--- a/openssl/src/crypto/hmac.rs
+++ b/openssl/src/crypto/hmac.rs
@@ -253,7 +253,7 @@ mod tests {
         ];
 
         let mut h = HMAC::new(MD5, &*tests[0].0);
-        for i in 0..100us {
+        for i in 0..100usize {
             let test = &tests[i % 2];
             test_hmac_recycle(&mut h, test);
         }
@@ -351,7 +351,7 @@ mod tests {
         ];
 
         let mut h = HMAC::new(SHA1, &*tests[0].0);
-        for i in 0..100us {
+        for i in 0..100usize {
             let test = &tests[i % 2];
             test_hmac_recycle(&mut h, test);
         }
@@ -382,7 +382,7 @@ mod tests {
 
         // recycle test
         let mut h = HMAC::new(ty, &*tests[5].0);
-        for i in 0..100us {
+        for i in 0..100usize {
             let test = &tests[4 + i % 2];
             let tup = (test.0.clone(), test.1.clone(), results[4 + i % 2].clone());
             test_hmac_recycle(&mut h, &tup);
diff --git a/openssl/src/lib.rs b/openssl/src/lib.rs
index 4fa57126..793c5ad3 100644
--- a/openssl/src/lib.rs
+++ b/openssl/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(unsafe_destructor, core, old_io, std_misc, libc, hash, old_path)]
+#![feature(unsafe_destructor, core, old_io, std_misc, libc, old_path)]
 #![crate_name="openssl"]
 #![crate_type="rlib"]
 #![crate_type="dylib"]
diff --git a/openssl/src/ssl/error.rs b/openssl/src/ssl/error.rs
index a80c244e..bb2a5557 100644
--- a/openssl/src/ssl/error.rs
+++ b/openssl/src/ssl/error.rs
@@ -4,7 +4,7 @@ pub use self::OpensslError::*;
 use libc::c_ulong;
 use std::error;
 use std::fmt;
-use std::ffi::c_str_to_bytes;
+use std::ffi::CStr;
 use std::old_io::IoError;
 
 use ffi;
@@ -75,21 +75,21 @@ pub enum OpensslError {
 
 fn get_lib(err: c_ulong) -> String {
     unsafe {
-        let bytes = c_str_to_bytes(&ffi::ERR_lib_error_string(err)).to_vec();
+        let bytes = CStr::from_ptr(ffi::ERR_lib_error_string(err)).to_bytes().to_vec();
         String::from_utf8(bytes).unwrap()
     }
 }
 
 fn get_func(err: c_ulong) -> String {
     unsafe {
-        let bytes = c_str_to_bytes(&ffi::ERR_func_error_string(err)).to_vec();
+        let bytes = CStr::from_ptr(ffi::ERR_func_error_string(err)).to_bytes().to_vec();
         String::from_utf8(bytes).unwrap()
     }
 }
 
 fn get_reason(err: c_ulong) -> String {
     unsafe {
-        let bytes = c_str_to_bytes(&ffi::ERR_reason_error_string(err)).to_vec();
+        let bytes = CStr::from_ptr(ffi::ERR_reason_error_string(err)).to_bytes().to_vec();
         String::from_utf8(bytes).unwrap()
     }
 }
diff --git a/openssl/src/ssl/mod.rs b/openssl/src/ssl/mod.rs
index b911e4e5..5d3549ff 100644
--- a/openssl/src/ssl/mod.rs
+++ b/openssl/src/ssl/mod.rs
@@ -1,5 +1,5 @@
 use libc::{c_int, c_void, c_long};
-use std::ffi::{CString, c_str_to_bytes};
+use std::ffi::{CStr, CString};
 use std::old_io::{IoResult, IoError, EndOfFile, OtherIoError, Stream, Reader, Writer};
 use std::mem;
 use std::fmt;
@@ -186,7 +186,7 @@ impl fmt::Debug for SslContext {
 
 impl Drop for SslContext {
     fn drop(&mut self) {
-        unsafe { ffi::SSL_CTX_free(self.ctx.ptr) }
+        unsafe { ffi::SSL_CTX_free(*self.ctx) }
     }
 }
 
@@ -200,18 +200,19 @@ impl SslContext {
             return Err(SslError::get());
         }
 
-        Ok(SslContext { ctx: ptr::Unique(ctx) })
+        let ctx = unsafe { SslContext { ctx: ptr::Unique::new(ctx) } };
+        Ok(ctx)
     }
 
     /// Configures the certificate verification method for new connections.
     pub fn set_verify(&mut self, mode: SslVerifyMode,
                       verify: Option<VerifyCallback>) {
         unsafe {
-            ffi::SSL_CTX_set_ex_data(self.ctx.ptr, VERIFY_IDX,
+            ffi::SSL_CTX_set_ex_data(*self.ctx, VERIFY_IDX,
                                      mem::transmute(verify));
             let f: extern fn(c_int, *mut ffi::X509_STORE_CTX) -> c_int =
                                 raw_verify;
-            ffi::SSL_CTX_set_verify(self.ctx.ptr, mode as c_int, Some(f));
+            ffi::SSL_CTX_set_verify(*self.ctx, mode as c_int, Some(f));
         }
     }
 
@@ -224,20 +225,20 @@ impl SslContext {
                                    data: T) {
         let data = Box::new(data);
         unsafe {
-            ffi::SSL_CTX_set_ex_data(self.ctx.ptr, VERIFY_IDX,
+            ffi::SSL_CTX_set_ex_data(*self.ctx, VERIFY_IDX,
                                      mem::transmute(Some(verify)));
-            ffi::SSL_CTX_set_ex_data(self.ctx.ptr, get_verify_data_idx::<T>(),
+            ffi::SSL_CTX_set_ex_data(*self.ctx, get_verify_data_idx::<T>(),
                                      mem::transmute(data));
             let f: extern fn(c_int, *mut ffi::X509_STORE_CTX) -> c_int =
                                 raw_verify_with_data::<T>;
-            ffi::SSL_CTX_set_verify(self.ctx.ptr, mode as c_int, Some(f));
+            ffi::SSL_CTX_set_verify(*self.ctx, mode as c_int, Some(f));
         }
     }
 
     /// Sets verification depth
     pub fn set_verify_depth(&mut self, depth: u32) {
         unsafe {
-            ffi::SSL_CTX_set_verify_depth(self.ctx.ptr, depth as c_int);
+            ffi::SSL_CTX_set_verify_depth(*self.ctx, depth as c_int);
         }
     }
 
@@ -246,8 +247,8 @@ impl SslContext {
     pub fn set_CA_file(&mut self, file: &Path) -> Option<SslError> {
         wrap_ssl_result(
             unsafe {
-                let file = CString::from_slice(file.as_vec());
-                ffi::SSL_CTX_load_verify_locations(self.ctx.ptr, file.as_ptr(), ptr::null())
+                let file = CString::new(file.as_vec()).unwrap();
+                ffi::SSL_CTX_load_verify_locations(*self.ctx, file.as_ptr(), ptr::null())
             })
     }
 
@@ -256,8 +257,8 @@ impl SslContext {
                                 file_type: X509FileType) -> Option<SslError> {
         wrap_ssl_result(
             unsafe {
-                let file = CString::from_slice(file.as_vec());
-                ffi::SSL_CTX_use_certificate_file(self.ctx.ptr, file.as_ptr(), file_type as c_int)
+                let file = CString::new(file.as_vec()).unwrap();
+                ffi::SSL_CTX_use_certificate_file(*self.ctx, file.as_ptr(), file_type as c_int)
             })
     }
 
@@ -266,16 +267,16 @@ impl SslContext {
                                 file_type: X509FileType) -> Option<SslError> {
         wrap_ssl_result(
             unsafe {
-                let file = CString::from_slice(file.as_vec());
-                ffi::SSL_CTX_use_PrivateKey_file(self.ctx.ptr, file.as_ptr(), file_type as c_int)
+                let file = CString::new(file.as_vec()).unwrap();
+                ffi::SSL_CTX_use_PrivateKey_file(*self.ctx, file.as_ptr(), file_type as c_int)
             })
     }
 
     pub fn set_cipher_list(&mut self, cipher_list: &str) -> Option<SslError> {
         wrap_ssl_result(
             unsafe {
-                let cipher_list = CString::from_slice(cipher_list.as_bytes());
-                ffi::SSL_CTX_set_cipher_list(self.ctx.ptr, cipher_list.as_ptr())
+                let cipher_list = CString::new(cipher_list.as_bytes()).unwrap();
+                ffi::SSL_CTX_set_cipher_list(*self.ctx, cipher_list.as_ptr())
             })
     }
 }
@@ -309,31 +310,31 @@ impl fmt::Debug for Ssl {
 
 impl Drop for Ssl {
     fn drop(&mut self) {
-        unsafe { ffi::SSL_free(self.ssl.ptr) }
+        unsafe { ffi::SSL_free(*self.ssl) }
     }
 }
 
 impl Ssl {
     pub fn new(ctx: &SslContext) -> Result<Ssl, SslError> {
-        let ssl = unsafe { ffi::SSL_new(ctx.ctx.ptr) };
+        let ssl = unsafe { ffi::SSL_new(*ctx.ctx) };
         if ssl == ptr::null_mut() {
             return Err(SslError::get());
         }
-        let ssl = Ssl { ssl: ptr::Unique(ssl) };
+        let ssl = unsafe { Ssl { ssl: ptr::Unique::new(ssl) } };
 
         let rbio = try!(MemBio::new());
         let wbio = try!(MemBio::new());
 
-        unsafe { ffi::SSL_set_bio(ssl.ssl.ptr, rbio.unwrap(), wbio.unwrap()) }
+        unsafe { ffi::SSL_set_bio(*ssl.ssl, rbio.unwrap(), wbio.unwrap()) }
         Ok(ssl)
     }
 
     fn get_rbio<'a>(&'a self) -> MemBioRef<'a> {
-        unsafe { self.wrap_bio(ffi::SSL_get_rbio(self.ssl.ptr)) }
+        unsafe { self.wrap_bio(ffi::SSL_get_rbio(*self.ssl)) }
     }
 
     fn get_wbio<'a>(&'a self) -> MemBioRef<'a> {
-        unsafe { self.wrap_bio(ffi::SSL_get_wbio(self.ssl.ptr)) }
+        unsafe { self.wrap_bio(ffi::SSL_get_wbio(*self.ssl)) }
     }
 
     fn wrap_bio<'a>(&'a self, bio: *mut ffi::BIO) -> MemBioRef<'a> {
@@ -345,25 +346,25 @@ impl Ssl {
     }
 
     fn connect(&self) -> c_int {
-        unsafe { ffi::SSL_connect(self.ssl.ptr) }
+        unsafe { ffi::SSL_connect(*self.ssl) }
     }
 
     fn accept(&self) -> c_int {
-        unsafe { ffi::SSL_accept(self.ssl.ptr) }
+        unsafe { ffi::SSL_accept(*self.ssl) }
     }
 
     fn read(&self, buf: &mut [u8]) -> c_int {
-        unsafe { ffi::SSL_read(self.ssl.ptr, buf.as_ptr() as *mut c_void,
+        unsafe { ffi::SSL_read(*self.ssl, buf.as_ptr() as *mut c_void,
                                buf.len() as c_int) }
     }
 
     fn write(&self, buf: &[u8]) -> c_int {
-        unsafe { ffi::SSL_write(self.ssl.ptr, buf.as_ptr() as *const c_void,
+        unsafe { ffi::SSL_write(*self.ssl, buf.as_ptr() as *const c_void,
                                 buf.len() as c_int) }
     }
 
     fn get_error(&self, ret: c_int) -> LibSslError {
-        let err = unsafe { ffi::SSL_get_error(self.ssl.ptr, ret) };
+        let err = unsafe { ffi::SSL_get_error(*self.ssl, ret) };
         match FromPrimitive::from_int(err as isize) {
             Some(err) => err,
             None => unreachable!()
@@ -377,8 +378,8 @@ impl Ssl {
                 //      #define SSL_set_tlsext_host_name(s,name) \
                 //          SSL_ctrl(s,SSL_CTRL_SET_TLSEXT_HOSTNAME,TLSEXT_NAMETYPE_host_name,(char *)name)
 
-                let hostname = CString::from_slice(hostname.as_bytes());
-                ffi::SSL_ctrl(self.ssl.ptr, ffi::SSL_CTRL_SET_TLSEXT_HOSTNAME,
+                let hostname = CString::new(hostname.as_bytes()).unwrap();
+                ffi::SSL_ctrl(*self.ssl, ffi::SSL_CTRL_SET_TLSEXT_HOSTNAME,
                               ffi::TLSEXT_NAMETYPE_host_name,
                               hostname.as_ptr() as *mut c_void)
         };
@@ -393,7 +394,7 @@ impl Ssl {
 
     pub fn get_peer_certificate(&self) -> Option<X509> {
         unsafe {
-            let ptr = ffi::SSL_get_peer_certificate(self.ssl.ptr);
+            let ptr = ffi::SSL_get_peer_certificate(*self.ssl);
             if ptr.is_null() {
                 None
             } else {
@@ -534,14 +535,14 @@ impl<S: Stream> SslStream<S> {
     /// either None, indicating no compression is in use, or a string
     /// with the compression name.
     pub fn get_compression(&self) -> Option<String> {
-        let ptr = unsafe { ffi::SSL_get_current_compression(self.ssl.ssl.ptr) };
+        let ptr = unsafe { ffi::SSL_get_current_compression(*self.ssl.ssl) };
         if ptr == ptr::null() {
             return None;
         }
 
         let meth = unsafe { ffi::SSL_COMP_get_name(ptr) };
         let s = unsafe {
-            String::from_utf8(c_str_to_bytes(&meth).to_vec()).unwrap()
+            String::from_utf8(CStr::from_ptr(meth).to_bytes().to_vec()).unwrap()
         };
 
         Some(s)
diff --git a/openssl/src/ssl/tests.rs b/openssl/src/ssl/tests.rs
index 73f479bf..4bb3c2ca 100644
--- a/openssl/src/ssl/tests.rs
+++ b/openssl/src/ssl/tests.rs
@@ -1,7 +1,7 @@
 use serialize::hex::FromHex;
 use std::old_io::net::tcp::TcpStream;
 use std::old_io::{Writer};
-use std::thread::Thread;
+use std::thread;
 
 use crypto::hash::Type::{SHA256};
 use ssl::SslMethod::Sslv23;
@@ -199,7 +199,7 @@ fn test_clone() {
     let stream = TcpStream::connect("127.0.0.1:15418").unwrap();
     let mut stream = SslStream::new(&SslContext::new(Sslv23).unwrap(), stream).unwrap();
     let mut stream2 = stream.clone();
-    let _t = Thread::spawn(move || {
+    let _t = thread::spawn(move || {
         stream2.write_all("GET /\r\n\r\n".as_bytes()).unwrap();
         stream2.flush().unwrap();
     });
diff --git a/openssl/src/x509/mod.rs b/openssl/src/x509/mod.rs
index 6c09f8b2..898ea633 100644
--- a/openssl/src/x509/mod.rs
+++ b/openssl/src/x509/mod.rs
@@ -247,7 +247,7 @@ impl X509Generator {
             let mut ctx: ffi::X509V3_CTX = mem::zeroed();
             ffi::X509V3_set_ctx(&mut ctx, x509, x509,
                                 ptr::null_mut(), ptr::null_mut(), 0);
-            let value = CString::from_slice(value.as_bytes());
+            let value = CString::new(value.as_bytes()).unwrap();
             let ext = ffi::X509V3_EXT_conf_nid(ptr::null_mut(),
                                                mem::transmute(&ctx),
                                                extension,
@@ -265,8 +265,8 @@ impl X509Generator {
     fn add_name(name: *mut ffi::X509_NAME, key: &str, value: &str) -> Result<(), SslError> {
         let value_len = value.len() as c_int;
         lift_ssl!(unsafe {
-            let key = CString::from_slice(key.as_bytes());
-            let value = CString::from_slice(value.as_bytes());
+            let key = CString::new(key.as_bytes()).unwrap();
+            let value = CString::new(value.as_bytes()).unwrap();
             ffi::X509_NAME_add_entry_by_txt(name, key.as_ptr(), ffi::MBSTRING_UTF8,
                                             value.as_ptr(), value_len, -1, 0)
         })