--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/math/gmp_desc.c	Thu Feb 22 14:53:49 2007 +0000
@@ -0,0 +1,478 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, [email protected], http://libtomcrypt.com
+ */
+
+#define DESC_DEF_ONLY
+#include "tomcrypt.h"
+
+#ifdef GMP_DESC
+
+#include <stdio.h>
+#include <gmp.h>
+
+static int init(void **a)
+{ 
+   LTC_ARGCHK(a != NULL);
+
+   *a = XCALLOC(1, sizeof(__mpz_struct));
+   if (*a == NULL) {
+      return CRYPT_MEM;
+   }
+   mpz_init(((__mpz_struct *)*a));
+   return CRYPT_OK;
+}
+
+static void deinit(void *a)
+{
+   LTC_ARGCHKVD(a != NULL);
+   mpz_clear(a);
+   XFREE(a);
+}
+
+static int neg(void *a, void *b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_neg(b, a);
+   return CRYPT_OK;
+}
+
+static int copy(void *a, void *b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_set(b, a);
+   return CRYPT_OK;
+}
+
+static int init_copy(void **a, void *b)
+{
+   if (init(a) != CRYPT_OK) {
+      return CRYPT_MEM;
+   }
+   return copy(b, *a);
+}
+
+/* ---- trivial ---- */
+static int set_int(void *a, unsigned long b)
+{
+   LTC_ARGCHK(a != NULL);
+   mpz_set_ui(((__mpz_struct *)a), b);
+   return CRYPT_OK;
+}
+
+static unsigned long get_int(void *a)
+{
+   LTC_ARGCHK(a != NULL);
+   return mpz_get_ui(a);
+}
+
+static unsigned long get_digit(void *a, int n)
+{
+   LTC_ARGCHK(a != NULL);
+   return mpz_getlimbn(a, n);
+}
+
+static int get_digit_count(void *a)
+{
+   LTC_ARGCHK(a != NULL);
+   return mpz_size(a);
+}
+   
+static int compare(void *a, void *b)
+{
+   int ret;
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   ret = mpz_cmp(a, b);
+   if (ret < 0) {
+      return LTC_MP_LT;
+   } else if (ret > 0) {
+      return LTC_MP_GT;
+   } else {
+      return LTC_MP_EQ;
+   }
+}
+
+static int compare_d(void *a, unsigned long b)
+{
+   int ret;
+   LTC_ARGCHK(a != NULL);
+   ret = mpz_cmp_ui(((__mpz_struct *)a), b);
+   if (ret < 0) {
+      return LTC_MP_LT;
+   } else if (ret > 0) {
+      return LTC_MP_GT;
+   } else {
+      return LTC_MP_EQ;
+   }
+}
+
+static int count_bits(void *a)
+{
+   LTC_ARGCHK(a != NULL);
+   return mpz_sizeinbase(a, 2);
+}
+
+static int count_lsb_bits(void *a)
+{
+   LTC_ARGCHK(a != NULL);
+   return mpz_scan1(a, 0);
+}
+
+
+static int twoexpt(void *a, int n)
+{
+   LTC_ARGCHK(a != NULL);
+   mpz_set_ui(a, 0);
+   mpz_setbit(a, n);
+   return CRYPT_OK;
+}
+
+/* ---- conversions ---- */
+
+/* read ascii string */
+static int read_radix(void *a, const char *b, int radix)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_set_str(a, b, radix);
+   return CRYPT_OK;
+}
+
+/* write one */
+static int write_radix(void *a, char *b, int radix)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_get_str(b, radix, a);
+   return CRYPT_OK;
+}
+
+/* get size as unsigned char string */
+static unsigned long unsigned_size(void *a)
+{
+   unsigned long t;
+   LTC_ARGCHK(a != NULL);
+   t = mpz_sizeinbase(a, 2);
+   if (mpz_cmp_ui(((__mpz_struct *)a), 0) == 0) return 0;
+   return (t>>3) + ((t&7)?1:0);
+}
+
+/* store */
+static int unsigned_write(void *a, unsigned char *b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_export(b, NULL, 1, 1, 1, 0, ((__mpz_struct*)a));
+   return CRYPT_OK;
+}
+
+/* read */
+static int unsigned_read(void *a, unsigned char *b, unsigned long len)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_import(a, len, 1, 1, 1, 0, b);
+   return CRYPT_OK;
+}
+
+/* add */
+static int add(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_add(c, a, b);
+   return CRYPT_OK;
+}
+  
+static int addi(void *a, unsigned long b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_add_ui(c, a, b);
+   return CRYPT_OK;
+}
+
+/* sub */
+static int sub(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_sub(c, a, b);
+   return CRYPT_OK;
+}
+
+static int subi(void *a, unsigned long b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_sub_ui(c, a, b);
+   return CRYPT_OK;
+}
+
+/* mul */
+static int mul(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_mul(c, a, b);
+   return CRYPT_OK;
+}
+
+static int muli(void *a, unsigned long b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_mul_ui(c, a, b);
+   return CRYPT_OK;
+}
+
+/* sqr */
+static int sqr(void *a, void *b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_mul(b, a, a);
+   return CRYPT_OK;
+}
+
+/* div */
+static int divide(void *a, void *b, void *c, void *d)
+{
+   mpz_t tmp;
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   if (c != NULL) {
+      mpz_init(tmp);
+      mpz_divexact(tmp, a, b);
+   }
+   if (d != NULL) {
+      mpz_mod(d, a, b);
+   }
+   if (c != NULL) {
+      mpz_set(c, tmp);
+      mpz_clear(tmp);
+   }
+   return CRYPT_OK;
+}
+
+static int div_2(void *a, void *b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_divexact_ui(b, a, 2);
+   return CRYPT_OK;
+}
+
+/* modi */
+static int modi(void *a, unsigned long b, unsigned long *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(c != NULL);
+   
+   *c = mpz_fdiv_ui(a, b);
+   return CRYPT_OK;
+}  
+
+/* gcd */
+static int gcd(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_gcd(c, a, b);
+   return CRYPT_OK;
+}
+
+/* lcm */
+static int lcm(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_lcm(c, a, b);
+   return CRYPT_OK;
+}
+
+static int mulmod(void *a, void *b, void *c, void *d)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   LTC_ARGCHK(d != NULL);
+   mpz_mul(d, a, b);
+   mpz_mod(d, d, c);
+   return CRYPT_OK;
+}
+
+static int sqrmod(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_mul(c, a, a);
+   mpz_mod(c, c, b);
+   return CRYPT_OK;
+}
+
+/* invmod */
+static int invmod(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_invert(c, a, b);
+   return CRYPT_OK;
+}
+
+/* setup */
+static int montgomery_setup(void *a, void **b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   *b = (void *)1;
+   return CRYPT_OK;
+}
+
+/* get normalization value */
+static int montgomery_normalization(void *a, void *b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   mpz_set_ui(a, 1);
+   return CRYPT_OK;
+}
+
+/* reduce */
+static int montgomery_reduce(void *a, void *b, void *c)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   mpz_mod(a, a, b);
+   return CRYPT_OK;
+}
+
+/* clean up */
+static void montgomery_deinit(void *a)
+{
+}
+
+static int exptmod(void *a, void *b, void *c, void *d)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   LTC_ARGCHK(c != NULL);
+   LTC_ARGCHK(d != NULL);
+   mpz_powm(d, a, b, c);
+   return CRYPT_OK;
+}   
+
+static int isprime(void *a, int *b)
+{
+   LTC_ARGCHK(a != NULL);
+   LTC_ARGCHK(b != NULL);
+   *b = mpz_probab_prime_p(a, 8) > 0 ? LTC_MP_YES : LTC_MP_NO;
+   return CRYPT_OK;
+}
+
+const ltc_math_descriptor gmp_desc = {
+   "GNU MP",
+   sizeof(mp_limb_t) * CHAR_BIT - GMP_NAIL_BITS,
+
+   &init,
+   &init_copy,
+   &deinit,
+
+   &neg,
+   &copy,
+
+   &set_int,
+   &get_int,
+   &get_digit,
+   &get_digit_count,
+   &compare,
+   &compare_d,
+   &count_bits,
+   &count_lsb_bits,
+   &twoexpt,
+
+   &read_radix,
+   &write_radix,
+   &unsigned_size,
+   &unsigned_write,
+   &unsigned_read,
+
+   &add,
+   &addi,
+   &sub,
+   &subi,
+   &mul,
+   &muli,
+   &sqr,
+   &divide,
+   &div_2,
+   &modi,
+   &gcd,
+   &lcm,
+
+   &mulmod,
+   &sqrmod,
+   &invmod,
+
+   &montgomery_setup,
+   &montgomery_normalization,
+   &montgomery_reduce,
+   &montgomery_deinit,
+
+   &exptmod,
+   &isprime,
+
+#ifdef MECC
+#ifdef MECC_FP
+   &ltc_ecc_fp_mulmod,
+#else
+   &ltc_ecc_mulmod,
+#endif /* MECC_FP */
+   &ltc_ecc_projective_add_point,
+   &ltc_ecc_projective_dbl_point,
+   &ltc_ecc_map,
+#ifdef LTC_ECC_SHAMIR
+#ifdef MECC_FP
+   &ltc_ecc_fp_mul2add,
+#else
+   &ltc_ecc_mul2add,
+#endif /* MECC_FP */
+#else
+   NULL,
+#endif /* LTC_ECC_SHAMIR */
+#else
+   NULL, NULL, NULL, NULL, NULL
+#endif /* MECC */
+
+#ifdef MRSA
+   &rsa_make_key,
+   &rsa_exptmod,
+#else
+   NULL, NULL
+#endif
+   
+};
+
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/math/gmp_desc.c,v $ */
+/* $Revision: 1.14 $ */
+/* $Date: 2006/12/03 00:39:56 $ */