1 files changed, 53 insertions, 0 deletions
diff --git a/librecrypt_common_rfc4848s4_encoding_lut_.c b/librecrypt_common_rfc4848s4_encoding_lut_.c
new file mode 100644
index 0000000..89b2feb
--- /dev/null
+++ b/librecrypt_common_rfc4848s4_encoding_lut_.c
@@ -0,0 +1,53 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+#define ALPHABET "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+NONSTRING const char librecrypt_common_rfc4848s4_encoding_lut_[256u] = MAKE_ENCODING_LUT(ALPHABET);
+
+
+#else
+
+
+int
+main(void)
+{
+	size_t i;
+	char c;
+
+	SET_UP_ALARM();
+
+	for (i = 0u; i < 64u; i++) {
+		c = librecrypt_common_rfc4848s4_encoding_lut_[i];
+
+		/* Check alphabet repeated 4 times (64 characters become 256) */
+		EXPECT(librecrypt_common_rfc4848s4_encoding_lut_[i + 64u * 1u] == c);
+		EXPECT(librecrypt_common_rfc4848s4_encoding_lut_[i + 64u * 2u] == c);
+		EXPECT(librecrypt_common_rfc4848s4_encoding_lut_[i + 64u * 3u] == c);
+
+		/* Check alphabet is valid: */
+		/*   printable but not whitespace */
+		EXPECT(c > ' ');
+		EXPECT(c < '\x7F');
+		/*   character does not have special mean */
+		EXPECT(c != LIBRECRYPT_HASH_COMPOSITION_DELIMITER);
+		EXPECT(c != LIBRECRYPT_ALGORITHM_LINK_DELIMITER);
+		EXPECT(c != '*');
+		/*   character is not ':' which has special meaning in table files */
+		EXPECT(c != ':');
+		/*   other characters forbidden by crypt(5) */
+		EXPECT(c != ';');
+		EXPECT(c != '!');
+		EXPECT(c != '\\');
+
+		/* Check encoding LUT matches decoding LUT;
+		 * this verifies that characters in the alphabet are unique */
+		EXPECT(librecrypt_common_rfc4848s4_decoding_lut_[(unsigned char)c] == i);
+	}
+
+	return 0;
+}
+
+
+#endif