Add libsodium to the tree and build what's needed from source.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3859 ed5197a5-7fde-0310-b194-c3ffbd925b24

deps/libsodium/test/default/kdf.c

@@ -0,0 +1,71 @@
+
+#define TEST_NAME "kdf"
+#include "cmptest.h"
+
+static void
+tv_kdf(void)
+{
+    unsigned char *master_key;
+    unsigned char *subkey;
+    char          *context;
+    char           hex[crypto_kdf_BYTES_MAX * 2 + 1];
+    uint64_t       i;
+    int            ret;
+
+    context = (char *) sodium_malloc(crypto_kdf_CONTEXTBYTES);
+    master_key = (unsigned char *) sodium_malloc(crypto_kdf_KEYBYTES);
+
+    memcpy(context, "KDF test", sizeof "KDF test" -1U);
+    for (i = 0; i < crypto_kdf_KEYBYTES; i++) {
+        master_key[i] = i;
+    }
+    subkey = (unsigned char *) sodium_malloc(crypto_kdf_BYTES_MAX);
+    for (i = 0; i < 10; i++) {
+        ret = crypto_kdf_derive_from_key(subkey, crypto_kdf_BYTES_MAX,
+                                         i, context, master_key);
+        assert(ret == 0);
+        sodium_bin2hex(hex, sizeof hex, subkey, crypto_kdf_BYTES_MAX);
+        printf("%s\n", hex);
+    }
+    sodium_free(subkey);
+
+    for (i = 0; i < crypto_kdf_BYTES_MAX + 2; i++) {
+        subkey = (unsigned char *) sodium_malloc(crypto_kdf_BYTES_MAX);
+        if (crypto_kdf_derive_from_key(subkey, (size_t) i,
+                                       i, context, master_key) == 0) {
+            sodium_bin2hex(hex, sizeof hex, subkey, (size_t) i);
+            printf("%s\n", hex);
+        } else {
+            printf("Failure -- probably expected for output length=%u\n",
+                   (unsigned int) i);
+        }
+        sodium_free(subkey);
+    }
+
+    sodium_free(master_key);
+    sodium_free(context);
+
+    assert(strcmp(crypto_kdf_primitive(), crypto_kdf_PRIMITIVE) == 0);
+    assert(crypto_kdf_BYTES_MAX > 0);
+    assert(crypto_kdf_BYTES_MIN <= crypto_kdf_BYTES_MAX);
+    assert(crypto_kdf_bytes_min() == crypto_kdf_BYTES_MIN);
+    assert(crypto_kdf_bytes_max() == crypto_kdf_BYTES_MAX);
+    assert(crypto_kdf_CONTEXTBYTES > 0);
+    assert(crypto_kdf_contextbytes() == crypto_kdf_CONTEXTBYTES);
+    assert(crypto_kdf_KEYBYTES >= 16);
+    assert(crypto_kdf_keybytes() == crypto_kdf_KEYBYTES);
+    assert(crypto_kdf_bytes_min() == crypto_kdf_blake2b_bytes_min());
+    assert(crypto_kdf_bytes_max() == crypto_kdf_blake2b_bytes_max());
+    assert(crypto_kdf_contextbytes() == crypto_kdf_blake2b_contextbytes());
+    assert(crypto_kdf_keybytes() == crypto_kdf_blake2b_keybytes());
+
+    printf("tv_kdf: ok\n");
+}
+
+int
+main(void)
+{
+    tv_kdf();
+
+    return 0;
+}