diff --git a/CalculatorCInterface/calculator_c_interface_lib.cpp b/CalculatorCInterface/calculator_c_interface_lib.cpp
index 2f7a882..4708e9e 100644
--- a/CalculatorCInterface/calculator_c_interface_lib.cpp
+++ b/CalculatorCInterface/calculator_c_interface_lib.cpp
@@ -5,6 +5,7 @@
 #include <QMap>
 #include <QString>
 #include <QDir>
+#include <mutex>
 
 
 #include <git2.h>
@@ -12,6 +13,9 @@
 #include <stdint.h>
 
 static QMap<QString, git_repository *> customerRepoMap;
+static std::mutex m;
+static char const *user = NULL;
+static char const *pass = NULL;
 
 #ifndef _WIN32
 # include <unistd.h>
@@ -41,6 +45,29 @@ typedef struct {
     unsigned int perf : 1;
 } checkout_options;
 
+int cred_acquire_cb(git_credential **out,
+                    const char *url,
+                    const char *username_from_url,
+                    unsigned int allowed_types,
+                    void *payload)
+{
+    char const *username = user, *password = pass;
+
+    fprintf(stderr, "%s:%d: opened repository %s %s\n", __func__, __LINE__, username, password);
+
+    Q_UNUSED(url);
+    Q_UNUSED(username_from_url);
+    Q_UNUSED(payload);
+    int error = -1;
+
+    if (allowed_types & GIT_CREDENTIAL_USERPASS_PLAINTEXT) {
+        error = git_credential_userpass_plaintext_new(out, username, password);
+    } else {
+        fprintf(stderr, "GIT_CREDENTIAL_USERPASS_PLAINTEXT not supported by protocol (allowed_types=%08x)\n", allowed_types);
+    }
+
+    return error;
+}
 
 static bool check(int error, const char *message, const char *extra) {
     const git_error *lg2err;
@@ -481,6 +508,89 @@ int CommitFile(char const *local_path, char const *branch_name,
     return error;
 }
 
+int PushLocalRepository(char const *local_path, char const *branch_name, char const *username, char const *password) {
+    git_repository *repo = NULL;
+    int error = -1;
+
+    fprintf(stderr, "%s:%d: %s %s\n", __func__, __LINE__, local_path, branch_name);
+
+    QString const currentWD = QDir::currentPath();
+
+    QString localRepoPath(QDir::cleanPath(QString(local_path) + QDir::separator() + ".git"));
+    QDir localRepoDir(localRepoPath);
+
+    if (!localRepoDir.exists()) {
+        fprintf(stderr, "local repository path %s does not exist\n",
+                localRepoPath.toUtf8().constData());
+        QDir::setCurrent(currentWD);
+        return -1;
+    }
+
+    if (!customerRepoMap.contains(localRepoPath)) {
+        if ((error = git_repository_open(&repo, localRepoPath.toUtf8().constData())) != 0) {
+            fprintf(stderr, "repository %s cannot be opened: %s\n",
+                    localRepoPath.toUtf8().constData(), git_error_last()->message);
+            QDir::setCurrent(currentWD);
+            return -1;
+        }
+        customerRepoMap.insert(localRepoPath, repo);
+    }
+
+    fprintf(stderr, "%s:%d: opened repository\n", __func__, __LINE__);
+
+    git_repository_state_t state = GIT_REPOSITORY_STATE_NONE;
+    git_push_options options;
+    git_remote_callbacks callbacks;
+    git_remote* remote = NULL;
+    char refspec_[] = "refs/heads/master";
+    char *refspec = refspec_;
+    const git_strarray refspecs = {
+        &refspec,
+        1
+    };
+
+    std::lock_guard<std::mutex> lock(m);
+
+    user = username;
+    pass = password;
+
+    fprintf(stderr, "%s:%d: opened repository %s %s\n", __func__, __LINE__, user, pass);
+
+    if (customerRepoMap.contains(localRepoPath)) {
+        repo = customerRepoMap[localRepoPath];
+
+        // Make sure we're not about to checkout while something else is going on
+        if ((state = (git_repository_state_t)git_repository_state(repo)) != GIT_REPOSITORY_STATE_NONE) {
+            fprintf(stderr, "repository %s is in unexpected state %d\n",
+                    localRepoPath.toUtf8().constData(), state);
+        } else {
+            if (check(git_remote_lookup(&remote, repo, "origin" ), "Unable to lookup remote", NULL)) {
+                if (check(git_remote_init_callbacks(&callbacks, GIT_REMOTE_CALLBACKS_VERSION),
+                          "Error initializing remote callbacks", NULL)) {
+                    callbacks.credentials = cred_acquire_cb;
+                    if (check(git_push_options_init(&options, GIT_PUSH_OPTIONS_VERSION ),
+                             "Error initializing push", NULL)) {
+                        options.callbacks = callbacks;
+                        if (check(git_remote_push(remote, &refspecs, &options), "Error pushing", NULL)) {
+                            fprintf(stderr, "%s:%d: pushed %s (branch: %s)\n", __func__, __LINE__, local_path, branch_name);
+                            error = 0;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    if (remote) {
+        git_remote_free(remote);
+    }
+
+    QDir::setCurrent(currentWD);
+    return error;
+}
+
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/CalculatorCInterface/calculator_c_interface_lib.h b/CalculatorCInterface/calculator_c_interface_lib.h
index c565b77..5df2734 100644
--- a/CalculatorCInterface/calculator_c_interface_lib.h
+++ b/CalculatorCInterface/calculator_c_interface_lib.h
@@ -19,6 +19,7 @@ int ShutdownGitLibrary(void) CALCULATOR_C_INTERFACE_LIB_EXPORT;
 int CloneRepository(char const *url, char const *local_path) CALCULATOR_C_INTERFACE_LIB_EXPORT;
 int CheckoutLocalBranch(char const *local_path, char const *branch) CALCULATOR_C_INTERFACE_LIB_EXPORT;
 int CommitFile(char const *local_path, char const *branch_name, char const *file_name, char const *commit_message) CALCULATOR_C_INTERFACE_LIB_EXPORT;
+int PushLocalRepository(char const *local_path, char const *branch_name, char const *user, char const *password) CALCULATOR_C_INTERFACE_LIB_EXPORT;
 
 #ifdef __cplusplus
 }