From 73100bf2aaa8a1bfc4b92f42a7461b99c587ef3d Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Wed, 17 Jul 2019 17:03:37 -0400
Subject: add hmac-sha2 and update files

---
 hash-main.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 hash-main.c

(limited to 'hash-main.c')

diff --git a/hash-main.c b/hash-main.c
new file mode 100644
index 0000000..61a6940
--- /dev/null
+++ b/hash-main.c
@@ -0,0 +1,50 @@
+#include <stdio.h> // printf()
+#include <string.h> // strlen()
+#include "sha2.h"
+
+static void print_hash(const uint8_t * const hash) {
+  for (size_t i = 0; i < SHA256_HASH_SIZE; i++) {
+    printf("%02x", hash[i]);
+  }
+}
+
+static void print_row(
+  const char * const src,
+  const uint8_t * const hash
+) {
+  printf("\"%s\",", src);
+  print_hash(hash);
+  printf("\n");
+}
+
+static uint8_t dst[SHA256_HASH_SIZE];
+static uint8_t buf[1 << 21];
+
+int main(int argc, char *argv[]) {
+  // if command-line parameters are given, then treat them as a
+  // list of files: open each file, hash it, and and print the
+  // result instead of running the test vectors
+
+  for (int i = 1; i < argc; i++) {
+    sha256_t ctx;
+    sha256_init(&ctx);
+
+    FILE *fh = fopen(argv[i], "rb");
+    if (!fh) {
+      fprintf(stderr, "fopen(\"%s\") failed", argv[i]);
+      return 1;
+    }
+
+    size_t len = 0;
+    while ((len = fread(buf, 1, sizeof(buf), fh)) > 0) {
+      sha256_push(&ctx, buf, len);
+    }
+
+    fclose(fh);
+
+    sha256_fini(&ctx, dst);
+    print_row(argv[i], dst);
+  }
+
+  return 0;
+}
-- 
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