remove @EAP_LDFLAGS@, no longer exists

[mech_eap.orig] / libeap / src / crypto / fips_prf_internal.c

diff --git a/libeap/src/crypto/fips_prf_internal.c b/libeap/src/crypto/fips_prf_internal.c
new file mode 100644 (file)
index 0000000..a85cb14
--- /dev/null
+++ b/libeap/src/crypto/fips_prf_internal.c
@@ -0,0 +1,74 @@
+/*
+ * FIPS 186-2 PRF for internal crypto implementation
+ * Copyright (c) 2006-2007, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "sha1.h"
+#include "sha1_i.h"
+#include "crypto.h"
+
+
+int fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x, size_t xlen)
+{
+       u8 xkey[64];
+       u32 t[5], _t[5];
+       int i, j, m, k;
+       u8 *xpos = x;
+       u32 carry;
+
+       if (seed_len > sizeof(xkey))
+               seed_len = sizeof(xkey);
+
+       /* FIPS 186-2 + change notice 1 */
+
+       os_memcpy(xkey, seed, seed_len);
+       os_memset(xkey + seed_len, 0, 64 - seed_len);
+       t[0] = 0x67452301;
+       t[1] = 0xEFCDAB89;
+       t[2] = 0x98BADCFE;
+       t[3] = 0x10325476;
+       t[4] = 0xC3D2E1F0;
+
+       m = xlen / 40;
+       for (j = 0; j < m; j++) {
+               /* XSEED_j = 0 */
+               for (i = 0; i < 2; i++) {
+                       /* XVAL = (XKEY + XSEED_j) mod 2^b */
+
+                       /* w_i = G(t, XVAL) */
+                       os_memcpy(_t, t, 20);
+                       SHA1Transform(_t, xkey);
+                       _t[0] = host_to_be32(_t[0]);
+                       _t[1] = host_to_be32(_t[1]);
+                       _t[2] = host_to_be32(_t[2]);
+                       _t[3] = host_to_be32(_t[3]);
+                       _t[4] = host_to_be32(_t[4]);
+                       os_memcpy(xpos, _t, 20);
+
+                       /* XKEY = (1 + XKEY + w_i) mod 2^b */
+                       carry = 1;
+                       for (k = 19; k >= 0; k--) {
+                               carry += xkey[k] + xpos[k];
+                               xkey[k] = carry & 0xff;
+                               carry >>= 8;
+                       }
+
+                       xpos += SHA1_MAC_LEN;
+               }
+               /* x_j = w_0|w_1 */
+       }
+
+       return 0;
+}