diff --git a/openssl-sys/src/lib.rs b/openssl-sys/src/lib.rs
index 53f22558..9365704e 100644
--- a/openssl-sys/src/lib.rs
+++ b/openssl-sys/src/lib.rs
@@ -433,6 +433,7 @@ extern "C" {
     pub fn EVP_PKEY_assign(pkey: *mut EVP_PKEY, typ: c_int, key: *const c_void) -> c_int;
     pub fn EVP_PKEY_get1_RSA(k: *mut EVP_PKEY) -> *mut RSA;
     pub fn EVP_PKEY_set1_RSA(k: *mut EVP_PKEY, r: *mut RSA) -> c_int;
+    pub fn EVP_PKEY_cmp(a: *const EVP_PKEY, b: *const EVP_PKEY) -> c_int;
 
     pub fn HMAC_CTX_init(ctx: *mut HMAC_CTX);
     pub fn HMAC_CTX_cleanup(ctx: *mut HMAC_CTX);
diff --git a/openssl/src/crypto/pkey.rs b/openssl/src/crypto/pkey.rs
index 33433b0c..b013e4dd 100644
--- a/openssl/src/crypto/pkey.rs
+++ b/openssl/src/crypto/pkey.rs
@@ -350,6 +350,10 @@ impl PKey {
     pub unsafe fn get_handle(&self) -> *mut ffi::EVP_PKEY {
         return self.evp
     }
+
+    pub fn public_eq(&self, other: &PKey) -> bool {
+        unsafe { ffi::EVP_PKEY_cmp(self.evp, other.evp) == 1 }
+    }
 }
 
 impl Drop for PKey {
@@ -373,6 +377,7 @@ mod tests {
         k0.gen(512);
         k1.load_pub(&k0.save_pub());
         assert_eq!(k0.save_pub(), k1.save_pub());
+        assert!(k0.public_eq(&k1));
         assert_eq!(k0.size(), k1.size());
         assert!(k0.can(super::Role::Encrypt));
         assert!(k0.can(super::Role::Decrypt));
@@ -391,6 +396,7 @@ mod tests {
         k0.gen(512);
         k1.load_priv(&k0.save_priv());
         assert_eq!(k0.save_priv(), k1.save_priv());
+        assert!(k0.public_eq(&k1));
         assert_eq!(k0.size(), k1.size());
         assert!(k0.can(super::Role::Encrypt));
         assert!(k0.can(super::Role::Decrypt));
@@ -461,4 +467,28 @@ mod tests {
         assert!(k1.verify_with_hash(&msg, &sig, MD5));
         assert!(!k1.verify_with_hash(&msg, &sig, SHA1));
     }
+
+    #[test]
+    fn test_eq() {
+        let mut k0 = super::PKey::new();
+        let mut p0 = super::PKey::new();
+        let mut k1 = super::PKey::new();
+        let mut p1 = super::PKey::new();
+        k0.gen(512);
+        k1.gen(512);
+        p0.load_pub(&k0.save_pub());
+        p1.load_pub(&k1.save_pub());
+
+        assert!(k0.public_eq(&k0));
+        assert!(k1.public_eq(&k1));
+        assert!(p0.public_eq(&p0));
+        assert!(p1.public_eq(&p1));
+        assert!(k0.public_eq(&p0));
+        assert!(k1.public_eq(&p1));
+
+        assert!(!k0.public_eq(&k1));
+        assert!(!p0.public_eq(&p1));
+        assert!(!k0.public_eq(&p1));
+        assert!(!p0.public_eq(&k1));
+    }
 }