1 files changed, 486 insertions, 0 deletions
diff --git a/src/libgit2/transports/credential.c b/src/libgit2/transports/credential.c
new file mode 100644
index 000000000..6e00b0282
--- /dev/null
+++ b/src/libgit2/transports/credential.c
@@ -0,0 +1,486 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+
+#include "git2/credential.h"
+#include "git2/sys/credential.h"
+#include "git2/credential_helpers.h"
+
+static int git_credential_ssh_key_type_new(
+	git_credential **cred,
+	const char *username,
+	const char *publickey,
+	const char *privatekey,
+	const char *passphrase,
+	git_credential_t credtype);
+
+int git_credential_has_username(git_credential *cred)
+{
+	if (cred->credtype == GIT_CREDENTIAL_DEFAULT)
+		return 0;
+
+	return 1;
+}
+
+const char *git_credential_get_username(git_credential *cred)
+{
+	switch (cred->credtype) {
+	case GIT_CREDENTIAL_USERNAME:
+	{
+		git_credential_username *c = (git_credential_username *) cred;
+		return c->username;
+	}
+	case GIT_CREDENTIAL_USERPASS_PLAINTEXT:
+	{
+		git_credential_userpass_plaintext *c = (git_credential_userpass_plaintext *) cred;
+		return c->username;
+	}
+	case GIT_CREDENTIAL_SSH_KEY:
+	case GIT_CREDENTIAL_SSH_MEMORY:
+	{
+		git_credential_ssh_key *c = (git_credential_ssh_key *) cred;
+		return c->username;
+	}
+	case GIT_CREDENTIAL_SSH_CUSTOM:
+	{
+		git_credential_ssh_custom *c = (git_credential_ssh_custom *) cred;
+		return c->username;
+	}
+	case GIT_CREDENTIAL_SSH_INTERACTIVE:
+	{
+		git_credential_ssh_interactive *c = (git_credential_ssh_interactive *) cred;
+		return c->username;
+	}
+
+	default:
+		return NULL;
+	}
+}
+
+static void plaintext_free(struct git_credential *cred)
+{
+	git_credential_userpass_plaintext *c = (git_credential_userpass_plaintext *)cred;
+
+	git__free(c->username);
+
+	/* Zero the memory which previously held the password */
+	if (c->password) {
+		size_t pass_len = strlen(c->password);
+		git__memzero(c->password, pass_len);
+		git__free(c->password);
+	}
+
+	git__free(c);
+}
+
+int git_credential_userpass_plaintext_new(
+	git_credential **cred,
+	const char *username,
+	const char *password)
+{
+	git_credential_userpass_plaintext *c;
+
+	GIT_ASSERT_ARG(cred);
+	GIT_ASSERT_ARG(username);
+	GIT_ASSERT_ARG(password);
+
+	c = git__malloc(sizeof(git_credential_userpass_plaintext));
+	GIT_ERROR_CHECK_ALLOC(c);
+
+	c->parent.credtype = GIT_CREDENTIAL_USERPASS_PLAINTEXT;
+	c->parent.free = plaintext_free;
+	c->username = git__strdup(username);
+
+	if (!c->username) {
+		git__free(c);
+		return -1;
+	}
+
+	c->password = git__strdup(password);
+
+	if (!c->password) {
+		git__free(c->username);
+		git__free(c);
+		return -1;
+	}
+
+	*cred = &c->parent;
+	return 0;
+}
+
+static void ssh_key_free(struct git_credential *cred)
+{
+	git_credential_ssh_key *c =
+		(git_credential_ssh_key *)cred;
+
+	git__free(c->username);
+
+	if (c->privatekey) {
+		/* Zero the memory which previously held the private key */
+		size_t key_len = strlen(c->privatekey);
+		git__memzero(c->privatekey, key_len);
+		git__free(c->privatekey);
+	}
+
+	if (c->passphrase) {
+		/* Zero the memory which previously held the passphrase */
+		size_t pass_len = strlen(c->passphrase);
+		git__memzero(c->passphrase, pass_len);
+		git__free(c->passphrase);
+	}
+
+	if (c->publickey) {
+		/* Zero the memory which previously held the public key */
+		size_t key_len = strlen(c->publickey);
+		git__memzero(c->publickey, key_len);
+		git__free(c->publickey);
+	}
+
+	git__free(c);
+}
+
+static void ssh_interactive_free(struct git_credential *cred)
+{
+	git_credential_ssh_interactive *c = (git_credential_ssh_interactive *)cred;
+
+	git__free(c->username);
+
+	git__free(c);
+}
+
+static void ssh_custom_free(struct git_credential *cred)
+{
+	git_credential_ssh_custom *c = (git_credential_ssh_custom *)cred;
+
+	git__free(c->username);
+
+	if (c->publickey) {
+		/* Zero the memory which previously held the publickey */
+		size_t key_len = strlen(c->publickey);
+		git__memzero(c->publickey, key_len);
+		git__free(c->publickey);
+	}
+
+	git__free(c);
+}
+
+static void default_free(struct git_credential *cred)
+{
+	git_credential_default *c = (git_credential_default *)cred;
+
+	git__free(c);
+}
+
+static void username_free(struct git_credential *cred)
+{
+	git__free(cred);
+}
+
+int git_credential_ssh_key_new(
+	git_credential **cred,
+	const char *username,
+	const char *publickey,
+	const char *privatekey,
+	const char *passphrase)
+{
+	return git_credential_ssh_key_type_new(
+		cred,
+		username,
+		publickey,
+		privatekey,
+		passphrase,
+		GIT_CREDENTIAL_SSH_KEY);
+}
+
+int git_credential_ssh_key_memory_new(
+	git_credential **cred,
+	const char *username,
+	const char *publickey,
+	const char *privatekey,
+	const char *passphrase)
+{
+#ifdef GIT_SSH_MEMORY_CREDENTIALS
+	return git_credential_ssh_key_type_new(
+		cred,
+		username,
+		publickey,
+		privatekey,
+		passphrase,
+		GIT_CREDENTIAL_SSH_MEMORY);
+#else
+	GIT_UNUSED(cred);
+	GIT_UNUSED(username);
+	GIT_UNUSED(publickey);
+	GIT_UNUSED(privatekey);
+	GIT_UNUSED(passphrase);
+
+	git_error_set(GIT_ERROR_INVALID,
+		"this version of libgit2 was not built with ssh memory credentials.");
+	return -1;
+#endif
+}
+
+static int git_credential_ssh_key_type_new(
+	git_credential **cred,
+	const char *username,
+	const char *publickey,
+	const char *privatekey,
+	const char *passphrase,
+	git_credential_t credtype)
+{
+	git_credential_ssh_key *c;
+
+	GIT_ASSERT_ARG(username);
+	GIT_ASSERT_ARG(cred);
+	GIT_ASSERT_ARG(privatekey);
+
+	c = git__calloc(1, sizeof(git_credential_ssh_key));
+	GIT_ERROR_CHECK_ALLOC(c);
+
+	c->parent.credtype = credtype;
+	c->parent.free = ssh_key_free;
+
+	c->username = git__strdup(username);
+	GIT_ERROR_CHECK_ALLOC(c->username);
+
+	c->privatekey = git__strdup(privatekey);
+	GIT_ERROR_CHECK_ALLOC(c->privatekey);
+
+	if (publickey) {
+		c->publickey = git__strdup(publickey);
+		GIT_ERROR_CHECK_ALLOC(c->publickey);
+	}
+
+	if (passphrase) {
+		c->passphrase = git__strdup(passphrase);
+		GIT_ERROR_CHECK_ALLOC(c->passphrase);
+	}
+
+	*cred = &c->parent;
+	return 0;
+}
+
+int git_credential_ssh_interactive_new(
+	git_credential **out,
+	const char *username,
+	git_credential_ssh_interactive_cb prompt_callback,
+	void *payload)
+{
+	git_credential_ssh_interactive *c;
+
+	GIT_ASSERT_ARG(out);
+	GIT_ASSERT_ARG(username);
+	GIT_ASSERT_ARG(prompt_callback);
+
+	c = git__calloc(1, sizeof(git_credential_ssh_interactive));
+	GIT_ERROR_CHECK_ALLOC(c);
+
+	c->parent.credtype = GIT_CREDENTIAL_SSH_INTERACTIVE;
+	c->parent.free = ssh_interactive_free;
+
+	c->username = git__strdup(username);
+	GIT_ERROR_CHECK_ALLOC(c->username);
+
+	c->prompt_callback = prompt_callback;
+	c->payload = payload;
+
+	*out = &c->parent;
+	return 0;
+}
+
+int git_credential_ssh_key_from_agent(git_credential **cred, const char *username) {
+	git_credential_ssh_key *c;
+
+	GIT_ASSERT_ARG(username);
+	GIT_ASSERT_ARG(cred);
+
+	c = git__calloc(1, sizeof(git_credential_ssh_key));
+	GIT_ERROR_CHECK_ALLOC(c);
+
+	c->parent.credtype = GIT_CREDENTIAL_SSH_KEY;
+	c->parent.free = ssh_key_free;
+
+	c->username = git__strdup(username);
+	GIT_ERROR_CHECK_ALLOC(c->username);
+
+	c->privatekey = NULL;
+
+	*cred = &c->parent;
+	return 0;
+}
+
+int git_credential_ssh_custom_new(
+	git_credential **cred,
+	const char *username,
+	const char *publickey,
+	size_t publickey_len,
+	git_credential_sign_cb sign_callback,
+	void *payload)
+{
+	git_credential_ssh_custom *c;
+
+	GIT_ASSERT_ARG(username);
+	GIT_ASSERT_ARG(cred);
+
+	c = git__calloc(1, sizeof(git_credential_ssh_custom));
+	GIT_ERROR_CHECK_ALLOC(c);
+
+	c->parent.credtype = GIT_CREDENTIAL_SSH_CUSTOM;
+	c->parent.free = ssh_custom_free;
+
+	c->username = git__strdup(username);
+	GIT_ERROR_CHECK_ALLOC(c->username);
+
+	if (publickey_len > 0) {
+		c->publickey = git__malloc(publickey_len);
+		GIT_ERROR_CHECK_ALLOC(c->publickey);
+
+		memcpy(c->publickey, publickey, publickey_len);
+	}
+
+	c->publickey_len = publickey_len;
+	c->sign_callback = sign_callback;
+	c->payload = payload;
+
+	*cred = &c->parent;
+	return 0;
+}
+
+int git_credential_default_new(git_credential **cred)
+{
+	git_credential_default *c;
+
+	GIT_ASSERT_ARG(cred);
+
+	c = git__calloc(1, sizeof(git_credential_default));
+	GIT_ERROR_CHECK_ALLOC(c);
+
+	c->credtype = GIT_CREDENTIAL_DEFAULT;
+	c->free = default_free;
+
+	*cred = c;
+	return 0;
+}
+
+int git_credential_username_new(git_credential **cred, const char *username)
+{
+	git_credential_username *c;
+	size_t len, allocsize;
+
+	GIT_ASSERT_ARG(cred);
+
+	len = strlen(username);
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&allocsize, sizeof(git_credential_username), len);
+	GIT_ERROR_CHECK_ALLOC_ADD(&allocsize, allocsize, 1);
+	c = git__malloc(allocsize);
+	GIT_ERROR_CHECK_ALLOC(c);
+
+	c->parent.credtype = GIT_CREDENTIAL_USERNAME;
+	c->parent.free = username_free;
+	memcpy(c->username, username, len + 1);
+
+	*cred = (git_credential *) c;
+	return 0;
+}
+
+void git_credential_free(git_credential *cred)
+{
+	if (!cred)
+		return;
+
+	cred->free(cred);
+}
+
+/* Deprecated credential functions */
+
+#ifndef GIT_DEPRECATE_HARD
+int git_cred_has_username(git_credential *cred)
+{
+	return git_credential_has_username(cred);
+}
+
+const char *git_cred_get_username(git_credential *cred)
+{
+	return git_credential_get_username(cred);
+}
+
+int git_cred_userpass_plaintext_new(
+	git_credential **out,
+	const char *username,
+	const char *password)
+{
+	return git_credential_userpass_plaintext_new(out,username, password);
+}
+
+int git_cred_default_new(git_credential **out)
+{
+	return git_credential_default_new(out);
+}
+
+int git_cred_username_new(git_credential **out, const char *username)
+{
+	return git_credential_username_new(out, username);
+}
+
+int git_cred_ssh_key_new(
+	git_credential **out,
+	const char *username,
+	const char *publickey,
+	const char *privatekey,
+	const char *passphrase)
+{
+	return git_credential_ssh_key_new(out, username,
+		publickey, privatekey, passphrase);
+}
+
+int git_cred_ssh_key_memory_new(
+	git_credential **out,
+	const char *username,
+	const char *publickey,
+	const char *privatekey,
+	const char *passphrase)
+{
+	return git_credential_ssh_key_memory_new(out, username,
+		publickey, privatekey, passphrase);
+}
+
+int git_cred_ssh_interactive_new(
+	git_credential **out,
+	const char *username,
+	git_credential_ssh_interactive_cb prompt_callback,
+	void *payload)
+{
+	return git_credential_ssh_interactive_new(out, username,
+		prompt_callback, payload);
+}
+
+int git_cred_ssh_key_from_agent(
+	git_credential **out,
+	const char *username)
+{
+	return git_credential_ssh_key_from_agent(out, username);
+}
+
+int git_cred_ssh_custom_new(
+	git_credential **out,
+	const char *username,
+	const char *publickey,
+	size_t publickey_len,
+	git_credential_sign_cb sign_callback,
+	void *payload)
+{
+	return git_credential_ssh_custom_new(out, username,
+		publickey, publickey_len, sign_callback, payload);
+}
+
+void git_cred_free(git_credential *cred)
+{
+	git_credential_free(cred);
+}
+#endif