+void BN_set_params(int mul,int high,int low,int mont);
+int BN_get_params(int which); /* 0, mul, 1 high, 2 low, 3 mont */
+
+void bn_mul_normal(BN_ULONG *r,BN_ULONG *a,int na,BN_ULONG *b,int nb);
+void bn_mul_comba8(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b);
+void bn_mul_comba4(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b);
+void bn_sqr_normal(BN_ULONG *r, BN_ULONG *a, int n, BN_ULONG *tmp);
+void bn_sqr_comba8(BN_ULONG *r,BN_ULONG *a);
+void bn_sqr_comba4(BN_ULONG *r,BN_ULONG *a);
+int bn_cmp_words(BN_ULONG *a,BN_ULONG *b,int n);
+void bn_mul_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,int n2,BN_ULONG *t);
+void bn_mul_part_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,
+ int tn, int n,BN_ULONG *t);
+void bn_sqr_recursive(BN_ULONG *r,BN_ULONG *a, int n2, BN_ULONG *t);
+void bn_mul_low_normal(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b, int n);
+
+void BN_RECP_CTX_init(BN_RECP_CTX *recp);
+BN_RECP_CTX *BN_RECP_CTX_new(void);
+void BN_RECP_CTX_free(BN_RECP_CTX *recp);
+int BN_RECP_CTX_set(BN_RECP_CTX *recp,BIGNUM *rdiv,BN_CTX *ctx);
+int BN_mod_mul_reciprocal(BIGNUM *r, BIGNUM *x, BIGNUM *y,
+ BN_RECP_CTX *recp,BN_CTX *ctx);
+int BN_mod_exp_recp(BIGNUM *r, BIGNUM *a, BIGNUM *p, BIGNUM *m,BN_CTX *ctx);
+int BN_div_recp(BIGNUM *dv, BIGNUM *rem, BIGNUM *m,
+ BN_RECP_CTX *recp, BN_CTX *ctx);
+
+