implement CTX check private key function

src/ssl.c

@@ -6336,15 +6336,49 @@ int wolfSSL_CertManagerLoadCA(WOLFSSL_CERT_MANAGER* cm, const char* file,
 }
 
 
-#ifndef NO_WOLFSSL_STUB
-int wolfSSL_CTX_check_private_key(WOLFSSL_CTX* ctx)
+/* Check private against public in certificate for match
+ *
+ * ctx  WOLFSSL_CTX structure to check private key in
+ *
+ * Returns SSL_SUCCESS on good private key and SSL_FAILURE if miss matched. */
+int wolfSSL_CTX_check_private_key(const WOLFSSL_CTX* ctx)
 {
-    /* TODO: check private against public for RSA match */
-    (void)ctx;
-    WOLFSSL_STUB("SSL_CTX_check_private_key");
-    return SSL_SUCCESS;
-}
+    DecodedCert der;
+    word32 size;
+    byte*  buff;
+    int    ret;
+
+    WOLFSSL_ENTER("wolfSSL_CTX_check_private_key");
+
+    if (ctx == NULL) {
+        return SSL_FAILURE;
+    }
+
+#ifndef NO_CERTS
+    size = ctx->certificate->length;
+    buff = ctx->certificate->buffer;
+    InitDecodedCert(&der, buff, size, ctx->heap);
+    if (ParseCertRelative(&der, CERT_TYPE, NO_VERIFY, NULL) != 0) {
+        FreeDecodedCert(&der);
+        return SSL_FAILURE;
+    }
+
+    size = ctx->privateKey->length;
+    buff = ctx->privateKey->buffer;
+    ret  = wc_CheckPrivateKey(buff, size, &der);
+    FreeDecodedCert(&der);
+
+    if (ret == 1) {
+        return SSL_SUCCESS;
+    }
+    else {
+        return SSL_FAILURE;
+    }
+#else
+    WOLFSSL_MSG("NO_CERTS is defined, can not check private key");
+    return SSL_FAILURE;
 #endif
+}
 
 #ifdef HAVE_CRL
 

tests/api.c

@@ -13563,8 +13563,14 @@ static void test_wolfSSL_certs(void)
     printf(testingFmt, "wolfSSL_certs()");
 
     AssertNotNull(ctx = SSL_CTX_new(wolfSSLv23_server_method()));
-    AssertTrue(SSL_CTX_use_certificate_file(ctx, svrCertFile, WOLFSSL_FILETYPE_PEM));
-    AssertTrue(SSL_CTX_use_PrivateKey_file(ctx, svrKeyFile, WOLFSSL_FILETYPE_PEM));
+    AssertTrue(SSL_CTX_use_certificate_file(ctx, svrCertFile, SSL_FILETYPE_PEM));
+    AssertTrue(SSL_CTX_use_PrivateKey_file(ctx, svrKeyFile, SSL_FILETYPE_PEM));
+    #ifndef HAVE_USER_RSA
+    AssertTrue(SSL_CTX_use_PrivateKey_file(ctx, cliKeyFile, SSL_FILETYPE_PEM));
+    AssertIntEQ(SSL_CTX_check_private_key(ctx), SSL_FAILURE);
+    AssertTrue(SSL_CTX_use_PrivateKey_file(ctx, svrKeyFile, SSL_FILETYPE_PEM));
+    AssertIntEQ(SSL_CTX_check_private_key(ctx), SSL_SUCCESS);
+    #endif
     AssertNotNull(ssl = SSL_new(ctx));
 
     AssertIntEQ(wolfSSL_check_private_key(ssl), WOLFSSL_SUCCESS);

wolfssl/ssl.h

@@ -1369,7 +1369,7 @@ WOLFSSL_API long wolfSSL_CTX_get_options(WOLFSSL_CTX* ctx);
 WOLFSSL_API long wolfSSL_CTX_clear_options(WOLFSSL_CTX*, long);
 
 #ifndef NO_CERTS
-  WOLFSSL_API int  wolfSSL_CTX_check_private_key(WOLFSSL_CTX*);
+  WOLFSSL_API int  wolfSSL_CTX_check_private_key(const WOLFSSL_CTX*);
 #endif /* !NO_CERTS */
 
 WOLFSSL_API void wolfSSL_ERR_free_strings(void);