From 99ac77fd22446858dd46523bd9ba60d268968407 Mon Sep 17 00:00:00 2001
From: gahr <gahr@gahr.ch>
Date: Sun, 13 Mar 2016 17:23:31 +0000
Subject: [e6f27aa56f] Add files I missed in my previous commit
---
libtommath/bn_mp_export.c | 88 ++++++++++++++++++++++++++
libtommath/bn_mp_expt_d_ex.c | 83 ++++++++++++++++++++++++
libtommath/bn_mp_get_long.c | 41 ++++++++++++
libtommath/bn_mp_get_long_long.c | 41 ++++++++++++
libtommath/bn_mp_import.c | 73 ++++++++++++++++++++++
libtommath/bn_mp_n_root_ex.c | 132 +++++++++++++++++++++++++++++++++++++++
libtommath/bn_mp_set_long.c | 24 +++++++
libtommath/bn_mp_set_long_long.c | 24 +++++++
libtommath/bn_mp_sqrtmod_prime.c | 124 ++++++++++++++++++++++++++++++++++++
libtommath/tommath_private.h | 125 ++++++++++++++++++++++++++++++++++++
10 files changed, 755 insertions(+)
create mode 100644 libtommath/bn_mp_export.c
create mode 100644 libtommath/bn_mp_expt_d_ex.c
create mode 100644 libtommath/bn_mp_get_long.c
create mode 100644 libtommath/bn_mp_get_long_long.c
create mode 100644 libtommath/bn_mp_import.c
create mode 100644 libtommath/bn_mp_n_root_ex.c
create mode 100644 libtommath/bn_mp_set_long.c
create mode 100644 libtommath/bn_mp_set_long_long.c
create mode 100644 libtommath/bn_mp_sqrtmod_prime.c
create mode 100644 libtommath/tommath_private.h
diff --git a/libtommath/bn_mp_export.c b/libtommath/bn_mp_export.c
new file mode 100644
index 0000000..ac4c2f9
--- /dev/null
+++ b/libtommath/bn_mp_export.c
@@ -0,0 +1,88 @@
+#include <tommath_private.h>
+#ifdef BN_MP_EXPORT_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* based on gmp's mpz_export.
+ * see http://gmplib.org/manual/Integer-Import-and-Export.html
+ */
+int mp_export(void* rop, size_t* countp, int order, size_t size,
+ int endian, size_t nails, mp_int* op) {
+ int result;
+ size_t odd_nails, nail_bytes, i, j, bits, count;
+ unsigned char odd_nail_mask;
+
+ mp_int t;
+
+ if ((result = mp_init_copy(&t, op)) != MP_OKAY) {
+ return result;
+ }
+
+ if (endian == 0) {
+ union {
+ unsigned int i;
+ char c[4];
+ } lint;
+ lint.i = 0x01020304;
+
+ endian = (lint.c[0] == 4) ? -1 : 1;
+ }
+
+ odd_nails = (nails % 8);
+ odd_nail_mask = 0xff;
+ for (i = 0; i < odd_nails; ++i) {
+ odd_nail_mask ^= (1 << (7 - i));
+ }
+ nail_bytes = nails / 8;
+
+ bits = mp_count_bits(&t);
+ count = (bits / ((size * 8) - nails)) + (((bits % ((size * 8) - nails)) != 0) ? 1 : 0);
+
+ for (i = 0; i < count; ++i) {
+ for (j = 0; j < size; ++j) {
+ unsigned char* byte = (
+ (unsigned char*)rop +
+ (((order == -1) ? i : ((count - 1) - i)) * size) +
+ ((endian == -1) ? j : ((size - 1) - j))
+ );
+
+ if (j >= (size - nail_bytes)) {
+ *byte = 0;
+ continue;
+ }
+
+ *byte = (unsigned char)((j == ((size - nail_bytes) - 1)) ? (t.dp[0] & odd_nail_mask) : (t.dp[0] & 0xFF));
+
+ if ((result = mp_div_2d(&t, ((j == ((size - nail_bytes) - 1)) ? (8 - odd_nails) : 8), &t, NULL)) != MP_OKAY) {
+ mp_clear(&t);
+ return result;
+ }
+ }
+ }
+
+ mp_clear(&t);
+
+ if (countp != NULL) {
+ *countp = count;
+ }
+
+ return MP_OKAY;
+}
+
+#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
diff --git a/libtommath/bn_mp_expt_d_ex.c b/libtommath/bn_mp_expt_d_ex.c
new file mode 100644
index 0000000..649d224
--- /dev/null
+++ b/libtommath/bn_mp_expt_d_ex.c
@@ -0,0 +1,83 @@
+#include <tommath_private.h>
+#ifdef BN_MP_EXPT_D_EX_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* calculate c = a**b using a square-multiply algorithm */
+int mp_expt_d_ex (mp_int * a, mp_digit b, mp_int * c, int fast)
+{
+ int res;
+ unsigned int x;
+
+ mp_int g;
+
+ if ((res = mp_init_copy (&g, a)) != MP_OKAY) {
+ return res;
+ }
+
+ /* set initial result */
+ mp_set (c, 1);
+
+ if (fast != 0) {
+ while (b > 0) {
+ /* if the bit is set multiply */
+ if ((b & 1) != 0) {
+ if ((res = mp_mul (c, &g, c)) != MP_OKAY) {
+ mp_clear (&g);
+ return res;
+ }
+ }
+
+ /* square */
+ if (b > 1) {
+ if ((res = mp_sqr (&g, &g)) != MP_OKAY) {
+ mp_clear (&g);
+ return res;
+ }
+ }
+
+ /* shift to next bit */
+ b >>= 1;
+ }
+ }
+ else {
+ for (x = 0; x < DIGIT_BIT; x++) {
+ /* square */
+ if ((res = mp_sqr (c, c)) != MP_OKAY) {
+ mp_clear (&g);
+ return res;
+ }
+
+ /* if the bit is set multiply */
+ if ((b & (mp_digit) (((mp_digit)1) << (DIGIT_BIT - 1))) != 0) {
+ if ((res = mp_mul (c, &g, c)) != MP_OKAY) {
+ mp_clear (&g);
+ return res;
+ }
+ }
+
+ /* shift to next bit */
+ b <<= 1;
+ }
+ } /* if ... else */
+
+ mp_clear (&g);
+ return MP_OKAY;
+}
+#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
diff --git a/libtommath/bn_mp_get_long.c b/libtommath/bn_mp_get_long.c
new file mode 100644
index 0000000..7c3d0fe
--- /dev/null
+++ b/libtommath/bn_mp_get_long.c
@@ -0,0 +1,41 @@
+#include <tommath_private.h>
+#ifdef BN_MP_GET_LONG_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* get the lower unsigned long of an mp_int, platform dependent */
+unsigned long mp_get_long(mp_int * a)
+{
+ int i;
+ unsigned long res;
+
+ if (a->used == 0) {
+ return 0;
+ }
+
+ /* get number of digits of the lsb we have to read */
+ i = MIN(a->used,(int)(((sizeof(unsigned long) * CHAR_BIT) + DIGIT_BIT - 1) / DIGIT_BIT)) - 1;
+
+ /* get most significant digit of result */
+ res = DIGIT(a,i);
+
+#if (ULONG_MAX != 0xffffffffuL) || (DIGIT_BIT < 32)
+ while (--i >= 0) {
+ res = (res << DIGIT_BIT) | DIGIT(a,i);
+ }
+#endif
+ return res;
+}
+#endif
diff --git a/libtommath/bn_mp_get_long_long.c b/libtommath/bn_mp_get_long_long.c
new file mode 100644
index 0000000..4b959e6
--- /dev/null
+++ b/libtommath/bn_mp_get_long_long.c
@@ -0,0 +1,41 @@
+#include <tommath_private.h>
+#ifdef BN_MP_GET_LONG_LONG_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* get the lower unsigned long long of an mp_int, platform dependent */
+unsigned long long mp_get_long_long (mp_int * a)
+{
+ int i;
+ unsigned long long res;
+
+ if (a->used == 0) {
+ return 0;
+ }
+
+ /* get number of digits of the lsb we have to read */
+ i = MIN(a->used,(int)(((sizeof(unsigned long long) * CHAR_BIT) + DIGIT_BIT - 1) / DIGIT_BIT)) - 1;
+
+ /* get most significant digit of result */
+ res = DIGIT(a,i);
+
+#if DIGIT_BIT < 64
+ while (--i >= 0) {
+ res = (res << DIGIT_BIT) | DIGIT(a,i);
+ }
+#endif
+ return res;
+}
+#endif
diff --git a/libtommath/bn_mp_import.c b/libtommath/bn_mp_import.c
new file mode 100644
index 0000000..dd4b8e6
--- /dev/null
+++ b/libtommath/bn_mp_import.c
@@ -0,0 +1,73 @@
+#include <tommath_private.h>
+#ifdef BN_MP_IMPORT_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* based on gmp's mpz_import.
+ * see http://gmplib.org/manual/Integer-Import-and-Export.html
+ */
+int mp_import(mp_int* rop, size_t count, int order, size_t size,
+ int endian, size_t nails, const void* op) {
+ int result;
+ size_t odd_nails, nail_bytes, i, j;
+ unsigned char odd_nail_mask;
+
+ mp_zero(rop);
+
+ if (endian == 0) {
+ union {
+ unsigned int i;
+ char c[4];
+ } lint;
+ lint.i = 0x01020304;
+
+ endian = (lint.c[0] == 4) ? -1 : 1;
+ }
+
+ odd_nails = (nails % 8);
+ odd_nail_mask = 0xff;
+ for (i = 0; i < odd_nails; ++i) {
+ odd_nail_mask ^= (1 << (7 - i));
+ }
+ nail_bytes = nails / 8;
+
+ for (i = 0; i < count; ++i) {
+ for (j = 0; j < (size - nail_bytes); ++j) {
+ unsigned char byte = *(
+ (unsigned char*)op +
+ (((order == 1) ? i : ((count - 1) - i)) * size) +
+ ((endian == 1) ? (j + nail_bytes) : (((size - 1) - j) - nail_bytes))
+ );
+
+ if (
+ (result = mp_mul_2d(rop, ((j == 0) ? (8 - odd_nails) : 8), rop)) != MP_OKAY) {
+ return result;
+ }
+
+ rop->dp[0] |= (j == 0) ? (byte & odd_nail_mask) : byte;
+ rop->used += 1;
+ }
+ }
+
+ mp_clamp(rop);
+
+ return MP_OKAY;
+}
+
+#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
diff --git a/libtommath/bn_mp_n_root_ex.c b/libtommath/bn_mp_n_root_ex.c
new file mode 100644
index 0000000..79d1dfb
--- /dev/null
+++ b/libtommath/bn_mp_n_root_ex.c
@@ -0,0 +1,132 @@
+#include <tommath_private.h>
+#ifdef BN_MP_N_ROOT_EX_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* find the n'th root of an integer
+ *
+ * Result found such that (c)**b <= a and (c+1)**b > a
+ *
+ * This algorithm uses Newton's approximation
+ * x[i+1] = x[i] - f(x[i])/f'(x[i])
+ * which will find the root in log(N) time where
+ * each step involves a fair bit. This is not meant to
+ * find huge roots [square and cube, etc].
+ */
+int mp_n_root_ex (mp_int * a, mp_digit b, mp_int * c, int fast)
+{
+ mp_int t1, t2, t3;
+ int res, neg;
+
+ /* input must be positive if b is even */
+ if (((b & 1) == 0) && (a->sign == MP_NEG)) {
+ return MP_VAL;
+ }
+
+ if ((res = mp_init (&t1)) != MP_OKAY) {
+ return res;
+ }
+
+ if ((res = mp_init (&t2)) != MP_OKAY) {
+ goto LBL_T1;
+ }
+
+ if ((res = mp_init (&t3)) != MP_OKAY) {
+ goto LBL_T2;
+ }
+
+ /* if a is negative fudge the sign but keep track */
+ neg = a->sign;
+ a->sign = MP_ZPOS;
+
+ /* t2 = 2 */
+ mp_set (&t2, 2);
+
+ do {
+ /* t1 = t2 */
+ if ((res = mp_copy (&t2, &t1)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+
+ /* t2 = t1 - ((t1**b - a) / (b * t1**(b-1))) */
+
+ /* t3 = t1**(b-1) */
+ if ((res = mp_expt_d_ex (&t1, b - 1, &t3, fast)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+
+ /* numerator */
+ /* t2 = t1**b */
+ if ((res = mp_mul (&t3, &t1, &t2)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+
+ /* t2 = t1**b - a */
+ if ((res = mp_sub (&t2, a, &t2)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+
+ /* denominator */
+ /* t3 = t1**(b-1) * b */
+ if ((res = mp_mul_d (&t3, b, &t3)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+
+ /* t3 = (t1**b - a)/(b * t1**(b-1)) */
+ if ((res = mp_div (&t2, &t3, &t3, NULL)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+
+ if ((res = mp_sub (&t1, &t3, &t2)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+ } while (mp_cmp (&t1, &t2) != MP_EQ);
+
+ /* result can be off by a few so check */
+ for (;;) {
+ if ((res = mp_expt_d_ex (&t1, b, &t2, fast)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+
+ if (mp_cmp (&t2, a) == MP_GT) {
+ if ((res = mp_sub_d (&t1, 1, &t1)) != MP_OKAY) {
+ goto LBL_T3;
+ }
+ } else {
+ break;
+ }
+ }
+
+ /* reset the sign of a first */
+ a->sign = neg;
+
+ /* set the result */
+ mp_exch (&t1, c);
+
+ /* set the sign of the result */
+ c->sign = neg;
+
+ res = MP_OKAY;
+
+LBL_T3:mp_clear (&t3);
+LBL_T2:mp_clear (&t2);
+LBL_T1:mp_clear (&t1);
+ return res;
+}
+#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
diff --git a/libtommath/bn_mp_set_long.c b/libtommath/bn_mp_set_long.c
new file mode 100644
index 0000000..281fce7
--- /dev/null
+++ b/libtommath/bn_mp_set_long.c
@@ -0,0 +1,24 @@
+#include <tommath_private.h>
+#ifdef BN_MP_SET_LONG_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* set a platform dependent unsigned long int */
+MP_SET_XLONG(mp_set_long, unsigned long)
+#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
diff --git a/libtommath/bn_mp_set_long_long.c b/libtommath/bn_mp_set_long_long.c
new file mode 100644
index 0000000..3c4b01a
--- /dev/null
+++ b/libtommath/bn_mp_set_long_long.c
@@ -0,0 +1,24 @@
+#include <tommath_private.h>
+#ifdef BN_MP_SET_LONG_LONG_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* set a platform dependent unsigned long long int */
+MP_SET_XLONG(mp_set_long_long, unsigned long long)
+#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
diff --git a/libtommath/bn_mp_sqrtmod_prime.c b/libtommath/bn_mp_sqrtmod_prime.c
new file mode 100644
index 0000000..968729e
--- /dev/null
+++ b/libtommath/bn_mp_sqrtmod_prime.c
@@ -0,0 +1,124 @@
+#include <tommath_private.h>
+#ifdef BN_MP_SQRTMOD_PRIME_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+/* Tonelli-Shanks algorithm
+ * https://en.wikipedia.org/wiki/Tonelli%E2%80%93Shanks_algorithm
+ * https://gmplib.org/list-archives/gmp-discuss/2013-April/005300.html
+ *
+ */
+
+int mp_sqrtmod_prime(mp_int *n, mp_int *prime, mp_int *ret)
+{
+ int res, legendre;
+ mp_int t1, C, Q, S, Z, M, T, R, two;
+ mp_digit i;
+
+ /* first handle the simple cases */
+ if (mp_cmp_d(n, 0) == MP_EQ) {
+ mp_zero(ret);
+ return MP_OKAY;
+ }
+ if (mp_cmp_d(prime, 2) == MP_EQ) return MP_VAL; /* prime must be odd */
+ if ((res = mp_jacobi(n, prime, &legendre)) != MP_OKAY) return res;
+ if (legendre == -1) return MP_VAL; /* quadratic non-residue mod prime */
+
+ if ((res = mp_init_multi(&t1, &C, &Q, &S, &Z, &M, &T, &R, &two, NULL)) != MP_OKAY) {
+ return res;
+ }
+
+ /* SPECIAL CASE: if prime mod 4 == 3
+ * compute directly: res = n^(prime+1)/4 mod prime
+ * Handbook of Applied Cryptography algorithm 3.36
+ */
+ if ((res = mp_mod_d(prime, 4, &i)) != MP_OKAY) goto cleanup;
+ if (i == 3) {
+ if ((res = mp_add_d(prime, 1, &t1)) != MP_OKAY) goto cleanup;
+ if ((res = mp_div_2(&t1, &t1)) != MP_OKAY) goto cleanup;
+ if ((res = mp_div_2(&t1, &t1)) != MP_OKAY) goto cleanup;
+ if ((res = mp_exptmod(n, &t1, prime, ret)) != MP_OKAY) goto cleanup;
+ res = MP_OKAY;
+ goto cleanup;
+ }
+
+ /* NOW: Tonelli-Shanks algorithm */
+
+ /* factor out powers of 2 from prime-1, defining Q and S as: prime-1 = Q*2^S */
+ if ((res = mp_copy(prime, &Q)) != MP_OKAY) goto cleanup;
+ if ((res = mp_sub_d(&Q, 1, &Q)) != MP_OKAY) goto cleanup;
+ /* Q = prime - 1 */
+ mp_zero(&S);
+ /* S = 0 */
+ while (mp_iseven(&Q) != MP_NO) {
+ if ((res = mp_div_2(&Q, &Q)) != MP_OKAY) goto cleanup;
+ /* Q = Q / 2 */
+ if ((res = mp_add_d(&S, 1, &S)) != MP_OKAY) goto cleanup;
+ /* S = S + 1 */
+ }
+
+ /* find a Z such that the Legendre symbol (Z|prime) == -1 */
+ if ((res = mp_set_int(&Z, 2)) != MP_OKAY) goto cleanup;
+ /* Z = 2 */
+ while(1) {
+ if ((res = mp_jacobi(&Z, prime, &legendre)) != MP_OKAY) goto cleanup;
+ if (legendre == -1) break;
+ if ((res = mp_add_d(&Z, 1, &Z)) != MP_OKAY) goto cleanup;
+ /* Z = Z + 1 */
+ }
+
+ if ((res = mp_exptmod(&Z, &Q, prime, &C)) != MP_OKAY) goto cleanup;
+ /* C = Z ^ Q mod prime */
+ if ((res = mp_add_d(&Q, 1, &t1)) != MP_OKAY) goto cleanup;
+ if ((res = mp_div_2(&t1, &t1)) != MP_OKAY) goto cleanup;
+ /* t1 = (Q + 1) / 2 */
+ if ((res = mp_exptmod(n, &t1, prime, &R)) != MP_OKAY) goto cleanup;
+ /* R = n ^ ((Q + 1) / 2) mod prime */
+ if ((res = mp_exptmod(n, &Q, prime, &T)) != MP_OKAY) goto cleanup;
+ /* T = n ^ Q mod prime */
+ if ((res = mp_copy(&S, &M)) != MP_OKAY) goto cleanup;
+ /* M = S */
+ if ((res = mp_set_int(&two, 2)) != MP_OKAY) goto cleanup;
+
+ res = MP_VAL;
+ while (1) {
+ if ((res = mp_copy(&T, &t1)) != MP_OKAY) goto cleanup;
+ i = 0;
+ while (1) {
+ if (mp_cmp_d(&t1, 1) == MP_EQ) break;
+ if ((res = mp_exptmod(&t1, &two, prime, &t1)) != MP_OKAY) goto cleanup;
+ i++;
+ }
+ if (i == 0) {
+ if ((res = mp_copy(&R, ret)) != MP_OKAY) goto cleanup;
+ res = MP_OKAY;
+ goto cleanup;
+ }
+ if ((res = mp_sub_d(&M, i, &t1)) != MP_OKAY) goto cleanup;
+ if ((res = mp_sub_d(&t1, 1, &t1)) != MP_OKAY) goto cleanup;
+ if ((res = mp_exptmod(&two, &t1, prime, &t1)) != MP_OKAY) goto cleanup;
+ /* t1 = 2 ^ (M - i - 1) */
+ if ((res = mp_exptmod(&C, &t1, prime, &t1)) != MP_OKAY) goto cleanup;
+ /* t1 = C ^ (2 ^ (M - i - 1)) mod prime */
+ if ((res = mp_sqrmod(&t1, prime, &C)) != MP_OKAY) goto cleanup;
+ /* C = (t1 * t1) mod prime */
+ if ((res = mp_mulmod(&R, &t1, prime, &R)) != MP_OKAY) goto cleanup;
+ /* R = (R * t1) mod prime */
+ if ((res = mp_mulmod(&T, &C, prime, &T)) != MP_OKAY) goto cleanup;
+ /* T = (T * C) mod prime */
+ mp_set(&M, i);
+ /* M = i */
+ }
+
+cleanup:
+ mp_clear_multi(&t1, &C, &Q, &S, &Z, &M, &T, &R, &two, NULL);
+ return res;
+}
+
+#endif
diff --git a/libtommath/tommath_private.h b/libtommath/tommath_private.h
new file mode 100644
index 0000000..d23c333
--- /dev/null
+++ b/libtommath/tommath_private.h
@@ -0,0 +1,125 @@
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://math.libtomcrypt.com
+ */
+#ifndef TOMMATH_PRIV_H_
+#define TOMMATH_PRIV_H_
+
+#include <tommath.h>
+#include <ctype.h>
+
+#ifndef MIN
+#define MIN(x,y) (((x) < (y)) ? (x) : (y))
+#endif
+
+#ifndef MAX
+#define MAX(x,y) (((x) > (y)) ? (x) : (y))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+
+/* C++ compilers don't like assigning void * to mp_digit * */
+#define OPT_CAST(x) (x *)
+
+#else
+
+/* C on the other hand doesn't care */
+#define OPT_CAST(x)
+
+#endif
+
+/* define heap macros */
+#if 0
+#ifndef XMALLOC
+ /* default to libc stuff */
+ #define XMALLOC malloc
+ #define XFREE free
+ #define XREALLOC realloc
+ #define XCALLOC calloc
+#else
+ /* prototypes for our heap functions */
+ extern void *XMALLOC(size_t n);
+ extern void *XREALLOC(void *p, size_t n);
+ extern void *XCALLOC(size_t n, size_t s);
+ extern void XFREE(void *p);
+#endif
+#endif
+
+/* lowlevel functions, do not call! */
+int s_mp_add(mp_int *a, mp_int *b, mp_int *c);
+int s_mp_sub(mp_int *a, mp_int *b, mp_int *c);
+#define s_mp_mul(a, b, c) s_mp_mul_digs(a, b, c, (a)->used + (b)->used + 1)
+int fast_s_mp_mul_digs(mp_int *a, mp_int *b, mp_int *c, int digs);
+int s_mp_mul_digs(mp_int *a, mp_int *b, mp_int *c, int digs);
+int fast_s_mp_mul_high_digs(mp_int *a, mp_int *b, mp_int *c, int digs);
+int s_mp_mul_high_digs(mp_int *a, mp_int *b, mp_int *c, int digs);
+int fast_s_mp_sqr(mp_int *a, mp_int *b);
+int s_mp_sqr(mp_int *a, mp_int *b);
+int mp_karatsuba_mul(mp_int *a, mp_int *b, mp_int *c);
+int mp_toom_mul(mp_int *a, mp_int *b, mp_int *c);
+int mp_karatsuba_sqr(mp_int *a, mp_int *b);
+int mp_toom_sqr(mp_int *a, mp_int *b);
+int fast_mp_invmod(mp_int *a, mp_int *b, mp_int *c);
+int mp_invmod_slow (mp_int * a, mp_int * b, mp_int * c);
+int fast_mp_montgomery_reduce(mp_int *x, mp_int *n, mp_digit rho);
+int mp_exptmod_fast(mp_int *G, mp_int *X, mp_int *P, mp_int *Y, int redmode);
+int s_mp_exptmod (mp_int * G, mp_int * X, mp_int * P, mp_int * Y, int redmode);
+void bn_reverse(unsigned char *s, int len);
+
+extern const char *mp_s_rmap;
+
+/* Fancy macro to set an MPI from another type.
+ * There are several things assumed:
+ * x is the counter and unsigned
+ * a is the pointer to the MPI
+ * b is the original value that should be set in the MPI.
+ */
+#define MP_SET_XLONG(func_name, type) \
+int func_name (mp_int * a, type b) \
+{ \
+ unsigned int x; \
+ int res; \
+ \
+ mp_zero (a); \
+ \
+ /* set four bits at a time */ \
+ for (x = 0; x < (sizeof(type) * 2u); x++) { \
+ /* shift the number up four bits */ \
+ if ((res = mp_mul_2d (a, 4, a)) != MP_OKAY) { \
+ return res; \
+ } \
+ \
+ /* OR in the top four bits of the source */ \
+ a->dp[0] |= (b >> ((sizeof(type) * 8u) - 4u)) & 15u; \
+ \
+ /* shift the source up to the next four bits */ \
+ b <<= 4; \
+ \
+ /* ensure that digits are not clamped off */ \
+ a->used += 1; \
+ } \
+ mp_clamp (a); \
+ return MP_OKAY; \
+}
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
+
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
--
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