1 files changed, 35 insertions, 0 deletions

diff --git a/src/bn/mod.rs b/src/bn/mod.rs
index bcf6c104..a4d23302 100644
--- a/src/bn/mod.rs
+++ b/src/bn/mod.rs
@@ -85,6 +85,24 @@ impl BigNum {
         })
     }
 
+    pub fn from_dec_str(s: &str) -> Result<BigNum, SslError> {
+        BigNum::new().and_then(|v| unsafe {
+            let ref mut bn_ptr = ffi::BIGNUM_PTR { ptr: v.raw(), };
+            let c_str = s.to_c_str();
+            try_ssl!(ffi::BN_dec2bn(bn_ptr, c_str.as_ptr()));
+            Ok(v)
+        })
+    }
+
+    pub fn from_hex_str(s: &str) -> Result<BigNum, SslError> {
+        BigNum::new().and_then(|v| unsafe {
+            let ref mut bn_ptr = ffi::BIGNUM_PTR { ptr: v.raw(), };
+            let c_str = s.to_c_str();
+            try_ssl!(ffi::BN_hex2bn(bn_ptr, c_str.as_ptr()));
+            Ok(v)
+        })
+    }
+
     pub fn new_from_slice(n: &[u8]) -> Result<BigNum, SslError> {
         BigNum::new().and_then(|v| unsafe {
             try_ssl_null!(ffi::BN_bin2bn(n.as_ptr(), n.len() as c_int, v.raw()));
@@ -146,6 +164,12 @@ impl BigNum {
         }
     }
 
+    pub fn mod_word(&self, w: c_ulong) -> c_ulong {
+        unsafe {
+            ffi::BN_mod_word(self.raw(), w)
+        }
+    }
+
     pub fn checked_gcd(&self, a: &BigNum) -> Result<BigNum, SslError> {
         unsafe {
             with_bn_in_ctx!(r, ctx, { ffi::BN_gcd(r.raw(), self.raw(), a.raw(), ctx) == 1 })
@@ -353,6 +377,17 @@ impl BigNum {
             str
         }
     }
+
+    pub fn to_hex_str(&self) -> String {
+        unsafe {
+            let buf = ffi::BN_bn2hex(self.raw());
+            assert!(!buf.is_null());
+            let c_str = CString::new(buf, false);
+            let str = c_str.as_str().unwrap().to_string();
+            ffi::CRYPTO_free(buf as *mut c_void);
+            str
+        }
+    }
 }
 
 impl fmt::Show for BigNum {