crypto/bn/bn_exp.c: SPARC portability fix.
[openssl.git] / crypto / bn / bntest.c
index 0d37dcf..7771e92 100644 (file)
@@ -98,6 +98,7 @@ int test_lshift(BIO *bp,BN_CTX *ctx,BIGNUM *a_);
 int test_rshift1(BIO *bp);
 int test_rshift(BIO *bp,BN_CTX *ctx);
 int test_div(BIO *bp,BN_CTX *ctx);
+int test_div_word(BIO *bp);
 int test_div_recp(BIO *bp,BN_CTX *ctx);
 int test_mul(BIO *bp);
 int test_sqr(BIO *bp,BN_CTX *ctx);
@@ -105,6 +106,8 @@ int test_mont(BIO *bp,BN_CTX *ctx);
 int test_mod(BIO *bp,BN_CTX *ctx);
 int test_mod_mul(BIO *bp,BN_CTX *ctx);
 int test_mod_exp(BIO *bp,BN_CTX *ctx);
+int test_mod_exp_mont_consttime(BIO *bp,BN_CTX *ctx);
+int test_mod_exp_mont5(BIO *bp, BN_CTX *ctx);
 int test_exp(BIO *bp,BN_CTX *ctx);
 int test_gf2m_add(BIO *bp);
 int test_gf2m_mod(BIO *bp);
@@ -182,113 +185,122 @@ int main(int argc, char *argv[])
 
        message(out,"BN_add");
        if (!test_add(out)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_sub");
        if (!test_sub(out)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_lshift1");
        if (!test_lshift1(out)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_lshift (fixed)");
        if (!test_lshift(out,ctx,BN_bin2bn(lst,sizeof(lst)-1,NULL)))
            goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_lshift");
        if (!test_lshift(out,ctx,NULL)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_rshift1");
        if (!test_rshift1(out)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_rshift");
        if (!test_rshift(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_sqr");
        if (!test_sqr(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_mul");
        if (!test_mul(out)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_div");
        if (!test_div(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
+
+       message(out,"BN_div_word");
+       if (!test_div_word(out)) goto err;
+       (void)BIO_flush(out);
 
        message(out,"BN_div_recp");
        if (!test_div_recp(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_mod");
        if (!test_mod(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_mod_mul");
        if (!test_mod_mul(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_mont");
        if (!test_mont(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_mod_exp");
        if (!test_mod_exp(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
+
+       message(out,"BN_mod_exp_mont_consttime");
+       if (!test_mod_exp_mont_consttime(out,ctx)) goto err;
+       if (!test_mod_exp_mont5(out,ctx)) goto err;
+       (void)BIO_flush(out);
 
        message(out,"BN_exp");
        if (!test_exp(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_kronecker");
        if (!test_kron(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_mod_sqrt");
        if (!test_sqrt(out,ctx)) goto err;
-       BIO_flush(out);
-
+       (void)BIO_flush(out);
+#ifndef OPENSSL_NO_EC2M
        message(out,"BN_GF2m_add");
        if (!test_gf2m_add(out)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod");
        if (!test_gf2m_mod(out)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod_mul");
        if (!test_gf2m_mod_mul(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod_sqr");
        if (!test_gf2m_mod_sqr(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod_inv");
        if (!test_gf2m_mod_inv(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod_div");
        if (!test_gf2m_mod_div(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod_exp");
        if (!test_gf2m_mod_exp(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod_sqrt");
        if (!test_gf2m_mod_sqrt(out,ctx)) goto err;
-       BIO_flush(out);
+       (void)BIO_flush(out);
 
        message(out,"BN_GF2m_mod_solve_quad");
        if (!test_gf2m_mod_solve_quad(out,ctx)) goto err;
-       BIO_flush(out);
-
+       (void)BIO_flush(out);
+#endif
        BN_CTX_free(ctx);
        BIO_free(out);
 
@@ -297,7 +309,7 @@ int main(int argc, char *argv[])
 err:
        BIO_puts(out,"1\n"); /* make sure the Perl script fed by bc notices
                              * the failure, see test_bn in test/Makefile.ssl*/
-       BIO_flush(out);
+       (void)BIO_flush(out);
        ERR_load_crypto_strings();
        ERR_print_errors_fp(stderr);
        EXIT(1);
@@ -463,6 +475,78 @@ int test_div(BIO *bp, BN_CTX *ctx)
        return(1);
        }
 
+static void print_word(BIO *bp,BN_ULONG w)
+       {
+#ifdef SIXTY_FOUR_BIT
+       if (sizeof(w) > sizeof(unsigned long))
+               {
+               unsigned long   h=(unsigned long)(w>>32),
+                               l=(unsigned long)(w);
+
+               if (h)  BIO_printf(bp,"%lX%08lX",h,l);
+               else    BIO_printf(bp,"%lX",l);
+               return;
+               }
+#endif
+       BIO_printf(bp,BN_HEX_FMT1,w);
+       }
+
+int test_div_word(BIO *bp)
+       {
+       BIGNUM   a,b;
+       BN_ULONG r,s;
+       int i;
+
+       BN_init(&a);
+       BN_init(&b);
+
+       for (i=0; i<num0; i++)
+               {
+               do {
+                       BN_bntest_rand(&a,512,-1,0);
+                       BN_bntest_rand(&b,BN_BITS2,-1,0);
+                       s = b.d[0];
+               } while (!s);
+
+               BN_copy(&b, &a);
+               r = BN_div_word(&b, s);
+
+               if (bp != NULL)
+                       {
+                       if (!results)
+                               {
+                               BN_print(bp,&a);
+                               BIO_puts(bp," / ");
+                               print_word(bp,s);
+                               BIO_puts(bp," - ");
+                               }
+                       BN_print(bp,&b);
+                       BIO_puts(bp,"\n");
+
+                       if (!results)
+                               {
+                               BN_print(bp,&a);
+                               BIO_puts(bp," % ");
+                               print_word(bp,s);
+                               BIO_puts(bp," - ");
+                               }
+                       print_word(bp,r);
+                       BIO_puts(bp,"\n");
+                       }
+               BN_mul_word(&b,s);
+               BN_add_word(&b,r);
+               BN_sub(&b,&a,&b);
+               if(!BN_is_zero(&b))
+                   {
+                   fprintf(stderr,"Division (word) test failed!\n");
+                   return 0;
+                   }
+               }
+       BN_free(&a);
+       BN_free(&b);
+       return(1);
+       }
+
 int test_div_recp(BIO *bp, BN_CTX *ctx)
        {
        BIGNUM a,b,c,d,e;
@@ -650,6 +734,8 @@ int test_mont(BIO *bp, BN_CTX *ctx)
        BN_init(&n);
 
        mont=BN_MONT_CTX_new();
+       if (mont == NULL)
+               return 0;
 
        BN_bntest_rand(&a,100,0,0); /**/
        BN_bntest_rand(&b,100,0,0); /**/
@@ -844,6 +930,57 @@ int test_mod_exp(BIO *bp, BN_CTX *ctx)
                BN_bntest_rand(b,2+i,0,0); /**/
 
                if (!BN_mod_exp(d,a,b,c,ctx))
+                       return(0);
+
+               if (bp != NULL)
+                       {
+                       if (!results)
+                               {
+                               BN_print(bp,a);
+                               BIO_puts(bp," ^ ");
+                               BN_print(bp,b);
+                               BIO_puts(bp," % ");
+                               BN_print(bp,c);
+                               BIO_puts(bp," - ");
+                               }
+                       BN_print(bp,d);
+                       BIO_puts(bp,"\n");
+                       }
+               BN_exp(e,a,b,ctx);
+               BN_sub(e,e,d);
+               BN_div(a,b,e,c,ctx);
+               if(!BN_is_zero(b))
+                   {
+                   fprintf(stderr,"Modulo exponentiation test failed!\n");
+                   return 0;
+                   }
+               }
+       BN_free(a);
+       BN_free(b);
+       BN_free(c);
+       BN_free(d);
+       BN_free(e);
+       return(1);
+       }
+
+int test_mod_exp_mont_consttime(BIO *bp, BN_CTX *ctx)
+       {
+       BIGNUM *a,*b,*c,*d,*e;
+       int i;
+
+       a=BN_new();
+       b=BN_new();
+       c=BN_new();
+       d=BN_new();
+       e=BN_new();
+
+       BN_bntest_rand(c,30,0,1); /* must be odd for montgomery */
+       for (i=0; i<num2; i++)
+               {
+               BN_bntest_rand(a,20+i*5,0,0); /**/
+               BN_bntest_rand(b,2+i,0,0); /**/
+
+               if (!BN_mod_exp_mont_consttime(d,a,b,c,ctx,NULL))
                        return(00);
 
                if (bp != NULL)
@@ -877,6 +1014,80 @@ int test_mod_exp(BIO *bp, BN_CTX *ctx)
        return(1);
        }
 
+/* Test constant-time modular exponentiation with 1024-bit inputs,
+ * which on x86_64 cause a different code branch to be taken.
+ */
+int test_mod_exp_mont5(BIO *bp, BN_CTX *ctx)
+       {
+       BIGNUM *a,*p,*m,*d,*e;
+
+       BN_MONT_CTX *mont;
+
+       a=BN_new();
+       p=BN_new();
+       m=BN_new();
+       d=BN_new();
+       e=BN_new();
+
+       mont = BN_MONT_CTX_new();
+
+       BN_bntest_rand(m,1024,0,1); /* must be odd for montgomery */
+       /* Zero exponent */
+       BN_bntest_rand(a,1024,0,0);
+       BN_zero(p);
+       if(!BN_mod_exp_mont_consttime(d,a,p,m,ctx,NULL))
+               return 0;
+       if(!BN_is_one(d))
+               {
+               fprintf(stderr, "Modular exponentiation test failed!\n");
+               return 0;
+               }
+       /* Zero input */
+       BN_bntest_rand(p,1024,0,0);
+       BN_zero(a);
+       if(!BN_mod_exp_mont_consttime(d,a,p,m,ctx,NULL))
+               return 0;
+       if(!BN_is_zero(d))
+               {
+               fprintf(stderr, "Modular exponentiation test failed!\n");
+               return 0;
+               }
+       /* Craft an input whose Montgomery representation is 1,
+        * i.e., shorter than the modulus m, in order to test
+        * the const time precomputation scattering/gathering.
+        */
+       BN_one(a);
+       BN_MONT_CTX_set(mont,m,ctx);
+       if(!BN_from_montgomery(e,a,mont,ctx))
+               return 0;
+       if(!BN_mod_exp_mont_consttime(d,e,p,m,ctx,NULL))
+               return 0;
+       if(!BN_mod_exp_simple(a,e,p,m,ctx))
+               return 0;
+       if(BN_cmp(a,d) != 0)
+               {
+               fprintf(stderr,"Modular exponentiation test failed!\n");
+               return 0;
+               }
+       /* Finally, some regular test vectors. */
+       BN_bntest_rand(e,1024,0,0);
+       if(!BN_mod_exp_mont_consttime(d,e,p,m,ctx,NULL))
+               return 0;
+       if(!BN_mod_exp_simple(a,e,p,m,ctx))
+               return 0;
+       if(BN_cmp(a,d) != 0)
+               {
+               fprintf(stderr,"Modular exponentiation test failed!\n");
+               return 0;
+               }
+       BN_free(a);
+       BN_free(p);
+       BN_free(m);
+       BN_free(d);
+       BN_free(e);
+       return(1);
+       }
+
 int test_exp(BIO *bp, BN_CTX *ctx)
        {
        BIGNUM *a,*b,*d,*e,*one;
@@ -894,8 +1105,8 @@ int test_exp(BIO *bp, BN_CTX *ctx)
                BN_bntest_rand(a,20+i*5,0,0); /**/
                BN_bntest_rand(b,2+i,0,0); /**/
 
-               if (!BN_exp(d,a,b,ctx))
-                       return(00);
+               if (BN_exp(d,a,b,ctx) <= 0)
+                       return(0);
 
                if (bp != NULL)
                        {
@@ -926,7 +1137,7 @@ int test_exp(BIO *bp, BN_CTX *ctx)
        BN_free(one);
        return(1);
        }
-
+#ifndef OPENSSL_NO_EC2M
 int test_gf2m_add(BIO *bp)
        {
        BIGNUM a,b,c;
@@ -983,8 +1194,8 @@ int test_gf2m_mod(BIO *bp)
        {
        BIGNUM *a,*b[2],*c,*d,*e;
        int i, j, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1041,8 +1252,8 @@ int test_gf2m_mod_mul(BIO *bp,BN_CTX *ctx)
        {
        BIGNUM *a,*b[2],*c,*d,*e,*f,*g,*h;
        int i, j, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1112,8 +1323,8 @@ int test_gf2m_mod_sqr(BIO *bp,BN_CTX *ctx)
        {
        BIGNUM *a,*b[2],*c,*d;
        int i, j, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1171,8 +1382,8 @@ int test_gf2m_mod_inv(BIO *bp,BN_CTX *ctx)
        {
        BIGNUM *a,*b[2],*c,*d;
        int i, j, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1226,8 +1437,8 @@ int test_gf2m_mod_div(BIO *bp,BN_CTX *ctx)
        {
        BIGNUM *a,*b[2],*c,*d,*e,*f;
        int i, j, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1289,8 +1500,8 @@ int test_gf2m_mod_exp(BIO *bp,BN_CTX *ctx)
        {
        BIGNUM *a,*b[2],*c,*d,*e,*f;
        int i, j, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1360,8 +1571,8 @@ int test_gf2m_mod_sqrt(BIO *bp,BN_CTX *ctx)
        {
        BIGNUM *a,*b[2],*c,*d,*e,*f;
        int i, j, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1419,8 +1630,8 @@ int test_gf2m_mod_solve_quad(BIO *bp,BN_CTX *ctx)
        {
        BIGNUM *a,*b[2],*c,*d,*e;
        int i, j, s = 0, t, ret = 0;
-       unsigned int p0[] = {163,7,6,3,0};
-       unsigned int p1[] = {193,15,0};
+       int p0[] = {163,7,6,3,0,-1};
+       int p1[] = {193,15,0,-1};
 
        a=BN_new();
        b[0]=BN_new();
@@ -1501,7 +1712,7 @@ int test_gf2m_mod_solve_quad(BIO *bp,BN_CTX *ctx)
        BN_free(e);
        return ret;
        }
-
+#endif
 static int genprime_cb(int p, int n, BN_GENCB *arg)
        {
        char c='*';