add the 'ead' package (emergency access daemon), which can provide remote access...

[openwrt/openwrt.git] / package / ead / src / tinysrp / t_math.c

diff --git a/package/ead/src/tinysrp/t_math.c b/package/ead/src/tinysrp/t_math.c
new file mode 100644 (file)
index 0000000..20161a0
--- /dev/null
+++ b/package/ead/src/tinysrp/t_math.c
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+/*
+ * Copyright (c) 1997-1999  The Stanford SRP Authentication Project
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
+ * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * In addition, the following conditions apply:
+ *
+ * 1. Any software that incorporates the SRP authentication technology
+ *    must display the following acknowlegment:
+ *    "This product uses the 'Secure Remote Password' cryptographic
+ *     authentication system developed by Tom Wu (tjw@CS.Stanford.EDU)."
+ *
+ * 2. Any software that incorporates all or part of the SRP distribution
+ *    itself must also display the following acknowledgment:
+ *    "This product includes software developed by Tom Wu and Eugene
+ *     Jhong for the SRP Distribution (http://srp.stanford.edu/srp/)."
+ *
+ * 3. Redistributions in source or binary form must retain an intact copy
+ *    of this copyright notice and list of conditions.
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+
+#include "config.h"
+
+#include "bn.h"
+typedef BIGNUM * BigInteger;
+#define MATH_PRIV
+
+#include "t_defines.h"
+#include "t_pwd.h"
+
+/* Math library interface stubs */
+
+BigInteger
+BigIntegerFromInt(n)
+     unsigned int n;
+{
+  BIGNUM * a = BN_new();
+  BN_set_word(a, n);
+  return a;
+}
+
+BigInteger
+BigIntegerFromBytes(bytes, length)
+     unsigned char * bytes;
+     int length;
+{
+  BIGNUM * a = BN_new();
+  BN_bin2bn(bytes, length, a);
+  return a;
+}
+
+int
+BigIntegerToBytes(src, dest)
+     BigInteger src;
+     unsigned char * dest;
+{
+  return BN_bn2bin(src, dest);
+}
+
+int
+BigIntegerCmp(c1, c2)
+     BigInteger c1, c2;
+{
+  return BN_cmp(c1, c2);
+}
+
+int
+BigIntegerCmpInt(c1, c2)
+     BigInteger c1;
+     unsigned int c2;
+{
+  BIGNUM * a = BN_new();
+  int rv;
+  BN_set_word(a, c2);
+  rv = BN_cmp(c1, a);
+  BN_free(a);
+  return rv;
+}
+
+void
+BigIntegerAdd(result, a1, a2)
+     BigInteger result, a1, a2;
+{
+  BN_add(result, a1, a2);
+}
+
+void
+BigIntegerAddInt(result, a1, a2)
+     BigInteger result, a1;
+     unsigned int a2;
+{
+  BIGNUM * a = BN_new();
+  BN_set_word(a, a2);
+  BN_add(result, a1, a);
+  BN_free(a);
+}
+
+void
+BigIntegerSub(result, s1, s2)
+     BigInteger result, s1, s2;
+{
+  BN_sub(result, s1, s2);
+}
+
+void
+BigIntegerMulInt(result, m1, m2)
+     BigInteger result, m1;
+     unsigned int m2;
+{
+  BN_CTX * ctx = BN_CTX_new();
+  BIGNUM * m = BN_new();
+  BN_set_word(m, m2);
+  BN_mul(result, m1, m, ctx);
+  BN_CTX_free(ctx);
+}
+
+void
+BigIntegerModMul(r, m1, m2, modulus)
+     BigInteger r, m1, m2, modulus;
+{
+  BN_CTX * ctx = BN_CTX_new();
+  BN_mod_mul(r, m1, m2, modulus, ctx);
+  BN_CTX_free(ctx);
+}
+
+void
+BigIntegerModExp(r, b, e, m)
+     BigInteger r, b, e, m;
+{
+  BN_CTX * ctx = BN_CTX_new();
+  BN_mod_exp(r, b, e, m, ctx);
+  BN_CTX_free(ctx);
+}
+
+void
+BigIntegerModExpInt(r, b, e, m)
+     BigInteger r, b;
+     unsigned int e;
+     BigInteger m;
+{
+  BN_CTX * ctx = BN_CTX_new();
+  BIGNUM * p = BN_new();
+  BN_set_word(p, e);
+  BN_mod_exp(r, b, p, m, ctx);
+  BN_free(p);
+  BN_CTX_free(ctx);
+}
+
+void
+BigIntegerFree(b)
+     BigInteger b;
+{
+  BN_free(b);
+}