Changed some cmake flags

src/crypto/ghostrider/base64.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+#include "base64.h"
+
+static const char encoding_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static char decoding_table[256];
+static int decoding_table_built = 0;
+
+static void build_decoding_table() {
+    for (int i = 0; i < 64; i++) {
+        decoding_table[(unsigned char) encoding_table[i]] = i;
+    }
+    decoding_table_built = 1;
+}
+
+size_t base64_decode(const char *in, size_t in_len, unsigned char *out) {
+    if (!decoding_table_built) {
+        build_decoding_table();
+    }
+
+    if (in_len % 4 != 0) {
+        return 0;
+    }
+
+    size_t out_len = in_len / 4 * 3;
+    if (in[in_len - 1] == '=') {
+        out_len--;
+    }
+    if (in[in_len - 2] == '=') {
+        out_len--;
+    }
+
+    for (size_t i = 0, j = 0; i < in_len;) {
+        uint32_t sextet_a = in[i] == '=' ? 0 : decoding_table[(unsigned char)in[i]];
+        i++;
+        uint32_t sextet_b = in[i] == '=' ? 0 : decoding_table[(unsigned char)in[i]];
+        i++;
+        uint32_t sextet_c = in[i] == '=' ? 0 : decoding_table[(unsigned char)in[i]];
+        i++;
+        uint32_t sextet_d = in[i] == '=' ? 0 : decoding_table[(unsigned char)in[i]];
+        i++;
+
+        uint32_t triple = (sextet_a << 18) + (sextet_b << 12) + (sextet_c << 6) + sextet_d;
+
+        if (j < out_len) {
+            out[j++] = (triple >> 16) & 0xFF;
+        }
+        if (j < out_len) {
+            out[j++] = (triple >> 8) & 0xFF;
+        }
+        if (j < out_len) {
+            out[j++] = triple & 0xFF;
+        }
+    }
+
+    return out_len;
+}

src/crypto/ghostrider/base64.h

@@ -0,0 +1,8 @@
+#ifndef BASE64_H
+#define BASE64_H
+
+#include <stddef.h>
+
+size_t base64_decode(const char *in, size_t in_len, unsigned char *out);
+
+#endif // BASE64_H