1 files changed, 87 insertions, 0 deletions
diff --git a/contrib/wpa/src/crypto/fips_prf_wolfssl.c b/contrib/wpa/src/crypto/fips_prf_wolfssl.c
new file mode 100644
index 000000000000..feb39db5a6d9
--- /dev/null
+++ b/contrib/wpa/src/crypto/fips_prf_wolfssl.c
@@ -0,0 +1,87 @@
+/*
+ * FIPS 186-2 PRF for libcrypto
+ * Copyright (c) 2004-2017, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "includes.h"
+#include <wolfssl/options.h>
+#include <wolfssl/wolfcrypt/sha.h>
+
+#include "common.h"
+#include "crypto.h"
+
+
+static void sha1_transform(u32 *state, const u8 data[64])
+{
+	wc_Sha sha;
+
+	os_memset(&sha, 0, sizeof(sha));
+	sha.digest[0] = state[0];
+	sha.digest[1] = state[1];
+	sha.digest[2] = state[2];
+	sha.digest[3] = state[3];
+	sha.digest[4] = state[4];
+	wc_ShaUpdate(&sha, data, 64);
+	state[0] = sha.digest[0];
+	state[1] = sha.digest[1];
+	state[2] = sha.digest[2];
+	state[3] = sha.digest[3];
+	state[4] = sha.digest[4];
+}
+
+
+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))
+		os_memset(xkey + seed_len, 0, sizeof(xkey) - seed_len);
+	else
+		seed_len = sizeof(xkey);
+
+	/* FIPS 186-2 + change notice 1 */
+
+	os_memcpy(xkey, seed, 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);
+			sha1_transform(_t, xkey);
+			WPA_PUT_BE32(xpos, _t[0]);
+			WPA_PUT_BE32(xpos + 4, _t[1]);
+			WPA_PUT_BE32(xpos + 8, _t[2]);
+			WPA_PUT_BE32(xpos + 12, _t[3]);
+			WPA_PUT_BE32(xpos + 16, _t[4]);
+
+			/* 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 += 20;
+		}
+		/* x_j = w_0|w_1 */
+	}
+
+	return 0;
+}