meson: init

1 files changed, 130 insertions, 0 deletions

diff --git a/libnpass/gpg.c b/libnpass/gpg.c
new file mode 100644
index 0000000..574a492
--- /dev/null
+++ b/libnpass/gpg.c
@@ -0,0 +1,130 @@
+#include <stdio.h>
+#include <errno.h>
+#include <locale.h>
+
+#include <gpgme.h>
+
+#include "gpg.h"
+#include "util.h"
+
+#define fail_if_err(err) \
+	if (err) { \
+		fprintf(stderr, "%s:%d: %s: %s\n", __FILE__, __LINE__, \
+		      gpgme_strsource(err), gpgme_strerror(err)); \
+		gpg_cleanup(); \
+		return 1; \
+	}
+
+static gpgme_ctx_t ctx = NULL;
+static gpgme_key_t key = NULL;
+
+int gpg_init(void);
+void gpg_cleanup(void);
+
+int gpg_init(void)
+{
+	gpgme_error_t err;
+	const char *local = setlocale(LC_ALL, "");
+	
+	gpgme_check_version(NULL);
+	gpgme_set_locale(NULL, LC_CTYPE, local);
+#ifdef LC_MESSAGES
+	gpgme_set_locale(NULL, LC_MESSAGES, local);
+#endif
+
+	err = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
+	fail_if_err(err);
+	err = gpgme_new(&ctx);
+	fail_if_err(err);
+
+	return 0;
+}
+
+void gpg_cleanup(void)
+{
+	if (ctx)
+		gpgme_key_release(key);
+	if (key)
+		gpgme_release(ctx);
+}
+
+int gpg_key_validate(const char *fpr)
+{
+	int r;
+	gpgme_error_t err;
+
+	r = gpg_init();
+	if (r)
+		return r;
+
+	err = gpgme_get_key(ctx, fpr, &key, 1);
+	fail_if_err(err);
+
+	gpg_cleanup();
+	return 0;
+}
+
+int gpg_decrypt(FILE *pass_out, const char *pass_path)
+{
+	int r;
+	char buf[BUFSIZ];
+	gpgme_data_t in, out;
+	gpgme_error_t err;
+
+	r = gpg_init();
+	if (r)
+		return r;
+
+	err = gpgme_data_new_from_file(&in, pass_path, 1);
+	fail_if_err(err);
+	err = gpgme_data_new(&out);
+	fail_if_err(err);
+	err = gpgme_op_decrypt(ctx, in, out);
+	fail_if_err(err);
+
+	r = gpgme_data_seek(out, 0, SEEK_SET);
+	if (r)
+		fail_if_err (gpgme_err_code_from_errno(errno));
+
+	while ((r = gpgme_data_read(out, buf, sizeof(buf))))
+		fwrite(buf, r, 1, pass_out);
+	if (r < 0)
+		fail_if_err(gpgme_err_code_from_errno(errno));
+
+	gpg_cleanup();
+	return 0;
+}
+
+int gpg_encrypt(FILE *stream, const char *fpr, const char *pass, size_t n)
+{
+	int r;
+	char buf[BUFSIZ];
+	gpgme_data_t in, out;
+	gpgme_error_t err;
+
+	r = gpg_init();
+	if (r)
+		return r;
+
+	err = gpgme_get_key(ctx, fpr, &key, 1);
+	fail_if_err(err);
+
+	err = gpgme_data_new_from_mem(&in, pass, n, 0);
+	fail_if_err(err);
+	err = gpgme_data_new(&out);
+	fail_if_err(err);
+	err = gpgme_op_encrypt(ctx, &key, GPGME_ENCRYPT_ALWAYS_TRUST, in, out);
+	fail_if_err(err);
+
+	r = gpgme_data_seek(out, 0, SEEK_SET);
+	if (r)
+		fail_if_err (gpgme_err_code_from_errno(errno));
+
+	while ((r = gpgme_data_read(out, buf, sizeof(buf))))
+		fwrite(buf, r, 1, stream);
+	gpg_cleanup();
+	if (r < 0)
+		fail_if_err(gpgme_err_code_from_errno(errno));
+
+	return 0;
+}