1 files changed, 64 insertions, 0 deletions
diff --git a/plugins/sudoers/b64_encode.c b/plugins/sudoers/b64_encode.c
new file mode 100644
index 0000000..8832ba9
--- /dev/null
+++ b/plugins/sudoers/b64_encode.c
@@ -0,0 +1,64 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2013-2018 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include "sudoers.h"
+
+static const unsigned char base64enc_tab[64] =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+size_t
+base64_encode(const unsigned char *in, size_t in_len, char *out, size_t out_len)
+{
+    size_t ii, io;
+    unsigned int rem, v;
+    debug_decl(base64_encode, SUDOERS_DEBUG_MATCH);
+
+    for (io = 0, ii = 0, v = 0, rem = 0; ii < in_len; ii++) {
+	unsigned char ch = in[ii];
+	v = (v << 8) | ch;
+	rem += 8;
+	while (rem >= 6) {
+	    rem -= 6;
+	    if (io >= out_len)
+		debug_return_size_t((size_t)-1); /* truncation is failure */
+	    out[io++] = base64enc_tab[(v >> rem) & 63];
+	}
+    }
+    if (rem != 0) {
+	v <<= (6 - rem);
+	if (io >= out_len)
+	    debug_return_size_t((size_t)-1); /* truncation is failure */
+	out[io++] = base64enc_tab[v&63];
+    }
+    while (io & 3) {
+	if (io >= out_len)
+	    debug_return_size_t((size_t)-1); /* truncation is failure */
+	out[io++] = '=';
+    }
+    if (io >= out_len)
+	debug_return_size_t((size_t)-1); /* no room for NUL terminator */
+    out[io] = '\0';
+    debug_return_size_t(io);
+}