1 files changed, 78 insertions, 0 deletions
diff --git a/security/nss/cmd/bltest/tests/aes_gcm/hex.c b/security/nss/cmd/bltest/tests/aes_gcm/hex.c
new file mode 100644
index 0000000000..cdf583da2f
--- /dev/null
+++ b/security/nss/cmd/bltest/tests/aes_gcm/hex.c
@@ -0,0 +1,78 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+tohex(int c)
+{
+    if ((c >= '0') && (c <= '9')) {
+        return c - '0';
+    }
+    if ((c >= 'a') && (c <= 'f')) {
+        return c - 'a' + 10;
+    }
+    if ((c >= 'A') && (c <= 'F')) {
+        return c - 'A' + 10;
+    }
+    return 0;
+}
+
+int
+isspace(int c)
+{
+    if (c <= ' ')
+        return 1;
+    if (c == '\n')
+        return 1;
+    if (c == '\t')
+        return 1;
+    if (c == ':')
+        return 1;
+    if (c == ';')
+        return 1;
+    if (c == ',')
+        return 1;
+    return 0;
+}
+
+void
+verify_nibble(int nibble, int current)
+{
+    if (nibble != 0) {
+        fprintf(stderr, "count mismatch %d (nibbles=0x%x)\n", nibble, current);
+        fflush(stderr);
+    }
+}
+
+int
+main(int argc, char **argv)
+{
+    int c;
+    int current = 0;
+    int nibble = 0;
+    int skip = 0;
+
+    if (argv[1]) {
+        skip = atoi(argv[1]);
+    }
+
+#define NIBBLE_COUNT 2
+    while ((c = getchar()) != EOF) {
+        if (isspace(c)) {
+            verify_nibble(nibble, current);
+            continue;
+        }
+        if (skip) {
+            skip--;
+            continue;
+        }
+        current = current << 4 | tohex(c);
+        nibble++;
+        if (nibble == NIBBLE_COUNT) {
+            putchar(current);
+            nibble = 0;
+            current = 0;
+        }
+    }
+    return 0;
+}