1 files changed, 115 insertions, 0 deletions

diff --git a/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/hmac_hmacsha256.c b/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/hmac_hmacsha256.c
new file mode 100644
index 00000000..2a268075
--- /dev/null
+++ b/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/hmac_hmacsha256.c
@@ -0,0 +1,115 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#ifdef  VANILLA_NACL /* toxcore only uses this when libsodium is unavailable */
+
+/*-
+ * Copyright 2005,2007,2009 Colin Percival
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+//#include "api.h"
+#include "crypto_auth_hmacsha256.h"
+#include "crypto_hash_sha256.h"
+#include "utils.h"
+
+#include <sys/types.h>
+
+#include <stdint.h>
+#include <string.h>
+
+int
+crypto_auth_hmacsha256_init(crypto_auth_hmacsha256_state *state,
+                            const unsigned char *key,
+                            size_t keylen)
+{
+    unsigned char pad[64];
+    unsigned char khash[32];
+    size_t        i;
+
+    if (keylen > 64) {
+        crypto_hash_sha256_init(&state->ictx);
+        crypto_hash_sha256_update(&state->ictx, key, keylen);
+        crypto_hash_sha256_final(&state->ictx, khash);
+        key = khash;
+        keylen = 32;
+    }
+    crypto_hash_sha256_init(&state->ictx);
+    memset(pad, 0x36, 64);
+    for (i = 0; i < keylen; i++) {
+        pad[i] ^= key[i];
+    }
+    crypto_hash_sha256_update(&state->ictx, pad, 64);
+
+    crypto_hash_sha256_init(&state->octx);
+    memset(pad, 0x5c, 64);
+    for (i = 0; i < keylen; i++) {
+        pad[i] ^= key[i];
+    }
+    crypto_hash_sha256_update(&state->octx, pad, 64);
+
+    sodium_memzero((void *) khash, sizeof khash);
+
+    return 0;
+}
+
+int
+crypto_auth_hmacsha256_update(crypto_auth_hmacsha256_state *state,
+                              const unsigned char *in,
+                              unsigned long long inlen)
+{
+    crypto_hash_sha256_update(&state->ictx, in, inlen);
+
+    return 0;
+}
+
+int
+crypto_auth_hmacsha256_final(crypto_auth_hmacsha256_state *state,
+                             unsigned char *out)
+{
+    unsigned char ihash[32];
+
+    crypto_hash_sha256_final(&state->ictx, ihash);
+    crypto_hash_sha256_update(&state->octx, ihash, 32);
+    crypto_hash_sha256_final(&state->octx, out);
+
+    sodium_memzero((void *) ihash, sizeof ihash);
+
+    return 0;
+}
+
+int
+crypto_auth(unsigned char *out, const unsigned char *in,
+            unsigned long long inlen, const unsigned char *k)
+{
+    crypto_auth_hmacsha256_state state;
+
+    crypto_auth_hmacsha256_init(&state, k, crypto_auth_hmacsha256_KEYBYTES);
+    crypto_auth_hmacsha256_update(&state, in, inlen);
+    crypto_auth_hmacsha256_final(&state, out);
+
+    return 0;
+}
+#endif