1 files changed, 77 insertions, 0 deletions
diff --git a/libbb/pw_encrypt.c b/libbb/pw_encrypt.c
new file mode 100644
index 0000000..0b826f4
--- /dev/null
+++ b/libbb/pw_encrypt.c
@@ -0,0 +1,77 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routine.
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+#if ENABLE_USE_BB_CRYPT
+
+/*
+ * DES and MD5 crypt implementations are taken from uclibc.
+ * They were modified to not use static buffers.
+ */
+/* Common for them */
+static const uint8_t ascii64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+#include "pw_encrypt_des.c"
+#include "pw_encrypt_md5.c"
+
+/* Other advanced crypt ids: */
+/* $2$ or $2a$: Blowfish */
+/* $5$: SHA-256 */
+/* $6$: SHA-512 */
+/* TODO: implement SHA - http://people.redhat.com/drepper/SHA-crypt.txt */
+
+static struct const_des_ctx *des_cctx;
+static struct des_ctx *des_ctx;
+
+/* my_crypt returns malloc'ed data */
+static char *my_crypt(const char *key, const char *salt)
+{
+	/* First, check if we are supposed to be using the MD5 replacement
+	 * instead of DES...  */
+	if (salt[0] == '$' && salt[1] == '1' && salt[2] == '$') {
+		return md5_crypt(xzalloc(MD5_OUT_BUFSIZE), (unsigned char*)key, (unsigned char*)salt);
+	}
+
+	{
+		if (!des_cctx)
+			des_cctx = const_des_init();
+		des_ctx = des_init(des_ctx, des_cctx);
+		return des_crypt(des_ctx, xzalloc(DES_OUT_BUFSIZE), (unsigned char*)key, (unsigned char*)salt);
+	}
+}
+
+/* So far nobody wants to have it public */
+static void my_crypt_cleanup(void)
+{
+	free(des_cctx);
+	free(des_ctx);
+	des_cctx = NULL;
+	des_ctx = NULL;
+}
+
+char* FAST_FUNC pw_encrypt(const char *clear, const char *salt, int cleanup)
+{
+	char *encrypted;
+
+	encrypted = my_crypt(clear, salt);
+
+	if (cleanup)
+		my_crypt_cleanup();
+
+	return encrypted;
+}
+
+#else /* if !ENABLE_USE_BB_CRYPT */
+
+char* FAST_FUNC pw_encrypt(const char *clear, const char *salt, int cleanup)
+{
+	return xstrdup(crypt(clear, salt));
+}
+
+#endif