static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom)
{
    unsigned char *buf = NULL;
    int ret = 0, bit, bytes, mask;
    time_t tim;
    if (bits == 0) {
        if (top != BN_RAND_TOP_ANY || bottom != BN_RAND_BOTTOM_ANY)
            goto toosmall;
        BN_zero(rnd);
        return 1;
    }
    if (bits < 0 || (bits == 1 && top > 0))
        goto toosmall;
    bytes = (bits + 7) / 8;
    bit = (bits - 1) % 8;
    mask = 0xff << (bit + 1);
    buf = OPENSSL_malloc(bytes);
    if (buf == NULL) {
        BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    time(&tim);
    RAND_add(&tim, sizeof(tim), 0.0);
    if (RAND_bytes(buf, bytes) <= 0)
        goto err;
    if (pseudorand == 2) {
        int i;
        unsigned char c;
        for (i = 0; i < bytes; i++) {
            if (RAND_bytes(&c, 1) <= 0)
                goto err;
            if (c >= 128 && i > 0)
                buf[i] = buf[i - 1];
            else if (c < 42)
                buf[i] = 0;
            else if (c < 84)
                buf[i] = 255;
        }
    }
    if (top >= 0) {
        if (top) {
            if (bit == 0) {
                buf[0] = 1;
                buf[1] |= 0x80;
            } else {
                buf[0] |= (3 << (bit - 1));
            }
        } else {
            buf[0] |= (1 << bit);
        }
    }
    buf[0] &= ~mask;
    if (bottom)
        buf[bytes - 1] |= 1;
    if (!BN_bin2bn(buf, bytes, rnd))
        goto err;
    ret = 1;
 err:
    OPENSSL_clear_free(buf, bytes);
    bn_check_top(rnd);
    return (ret);
toosmall:
    BNerr(BN_F_BNRAND, BN_R_BITS_TOO_SMALL);
    return 0;
}
['static int prime_field_tests(void)\n{\n    BN_CTX *ctx = NULL;\n    BIGNUM *p = NULL, *a = NULL, *b = NULL, *scalar3 = NULL;\n    EC_GROUP *group = NULL, *tmp = NULL;\n    EC_GROUP *P_160 = NULL, *P_192 = NULL, *P_224 = NULL,\n             *P_256 = NULL, *P_384 = NULL, *P_521 = NULL;\n    EC_POINT *P = NULL, *Q = NULL, *R = NULL;\n    BIGNUM *x = NULL, *y = NULL, *z = NULL, *yplusone = NULL;\n    const EC_POINT *points[4];\n    const BIGNUM *scalars[4];\n    unsigned char buf[100];\n    size_t i, len, r = 0;\n    int k;\n    if (!TEST_ptr(ctx = BN_CTX_new())\n        || !TEST_ptr(p = BN_new())\n        || !TEST_ptr(a = BN_new())\n        || !TEST_ptr(b = BN_new())\n        || !TEST_true(BN_hex2bn(&p, "17"))\n        || !TEST_true(BN_hex2bn(&a, "1"))\n        || !TEST_true(BN_hex2bn(&b, "1"))\n        || !TEST_ptr(group = EC_GROUP_new(EC_GFp_mont_method()))\n        || !TEST_true(EC_GROUP_set_curve_GFp(group, p, a, b, ctx))\n        || !TEST_ptr(tmp = EC_GROUP_new(EC_GROUP_method_of(group)))\n        || !TEST_true(EC_GROUP_copy(tmp, group)))\n        goto err;\n    EC_GROUP_free(group);\n    group = tmp;\n    tmp = NULL;\n    if (!TEST_true(EC_GROUP_get_curve_GFp(group, p, a, b, ctx)))\n        goto err;\n    BIO_printf(bio_out,\n            "Curve defined by Weierstrass equation\\n"\n            "     y^2 = x^3 + a*x + b  (mod 0x");\n    BN_print(bio_out, p);\n    BIO_printf(bio_out, ")\\n     a = 0x");\n    BN_print(bio_out, a);\n    BIO_printf(bio_out, "\\n     b = 0x");\n    BN_print(bio_out, b);\n    BIO_printf(bio_out, "\\n");\n    buf[0] = 0;\n    if (!TEST_ptr(P = EC_POINT_new(group))\n        || !TEST_ptr(Q = EC_POINT_new(group))\n        || !TEST_ptr(R = EC_POINT_new(group))\n        || !TEST_true(EC_POINT_set_to_infinity(group, P))\n        || !TEST_true(EC_POINT_is_at_infinity(group, P))\n        || !TEST_true(EC_POINT_oct2point(group, Q, buf, 1, ctx))\n        || !TEST_true(EC_POINT_add(group, P, P, Q, ctx))\n        || !TEST_true(EC_POINT_is_at_infinity(group, P))\n        || !TEST_ptr(x = BN_new())\n        || !TEST_ptr(y = BN_new())\n        || !TEST_ptr(z = BN_new())\n        || !TEST_ptr(yplusone = BN_new())\n        || !TEST_true(BN_hex2bn(&x, "D"))\n        || !TEST_true(EC_POINT_set_compressed_coordinates_GFp(group, Q, x, 1,\n                                                              ctx)))\n        goto err;\n    if (!TEST_int_gt(EC_POINT_is_on_curve(group, Q, ctx), 0)) {\n        if (!TEST_true(EC_POINT_get_affine_coordinates_GFp(group, Q, x, y,\n                                                           ctx)))\n            goto err;\n        BIO_printf(bio_err, "Point is not on curve: x = 0x");\n        BN_print_fp(stderr, x);\n        BIO_printf(bio_err, ", y = 0x");\n        BN_print_fp(stderr, y);\n        BIO_printf(bio_err, "\\n");\n        goto err;\n    }\n    BIO_printf(bio_out, "A cyclic subgroup:\\n");\n    k = 100;\n    do {\n        if (!TEST_int_ne(k--, 0))\n            goto err;\n        if (EC_POINT_is_at_infinity(group, P)) {\n            BIO_printf(bio_out, "     point at infinity\\n");\n        } else {\n            if (!TEST_true(EC_POINT_get_affine_coordinates_GFp(group, P, x, y,\n                                                               ctx)))\n                goto err;\n            BIO_printf(bio_out, "     x = 0x");\n            BN_print(bio_out, x);\n            BIO_printf(bio_out, ", y = 0x");\n            BN_print(bio_out, y);\n            BIO_printf(bio_out, "\\n");\n        }\n        if (!TEST_true(EC_POINT_copy(R, P))\n            || !TEST_true(EC_POINT_add(group, P, P, Q, ctx)))\n            goto err;\n    } while (!EC_POINT_is_at_infinity(group, P));\n    if (!TEST_true(EC_POINT_add(group, P, Q, R, ctx))\n        || !TEST_true(EC_POINT_is_at_infinity(group, P)))\n        goto err;\n    len =\n        EC_POINT_point2oct(group, Q, POINT_CONVERSION_COMPRESSED, buf,\n                           sizeof buf, ctx);\n    if (!TEST_size_t_ne(len, 0)\n        || !TEST_true(EC_POINT_oct2point(group, P, buf, len, ctx))\n        || !TEST_int_eq(0, EC_POINT_cmp(group, P, Q, ctx)))\n        goto err;\n    BIO_printf(bio_out, "Generator as octet string, compressed form:\\n     ");\n    for (i = 0; i < len; i++)\n        BIO_printf(bio_out, "%02X", buf[i]);\n    len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_UNCOMPRESSED,\n                             buf, sizeof buf, ctx);\n    if (!TEST_size_t_ne(len, 0)\n        || !TEST_true(EC_POINT_oct2point(group, P, buf, len, ctx))\n        || !TEST_int_eq(0, EC_POINT_cmp(group, P, Q, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nGenerator as octet string, uncompressed form:\\n"\n                        "     ");\n    for (i = 0; i < len; i++)\n        BIO_printf(bio_out, "%02X", buf[i]);\n    len = EC_POINT_point2oct(group, Q, POINT_CONVERSION_HYBRID,\n                             buf, sizeof buf, ctx);\n    if (!TEST_size_t_ne(len, 0)\n        || !TEST_true(EC_POINT_oct2point(group, P, buf, len, ctx))\n        || !TEST_int_eq(0, EC_POINT_cmp(group, P, Q, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nGenerator as octet string, hybrid form:\\n     ");\n    for (i = 0; i < len; i++)\n        BIO_printf(bio_out, "%02X", buf[i]);\n    if (!TEST_true(EC_POINT_get_Jprojective_coordinates_GFp(group, R, x, y, z,\n                                                            ctx)))\n        goto err;\n    BIO_printf(bio_out,\n               "\\nA representation of the inverse of that generator in\\n"\n               "Jacobian projective coordinates:\\n"\n               "     X = 0x");\n    BN_print(bio_out, x);\n    BIO_printf(bio_out, ", Y = 0x");\n    BN_print(bio_out, y);\n    BIO_printf(bio_out, ", Z = 0x");\n    BN_print(bio_out, z);\n    BIO_printf(bio_out, "\\n");\n    if (!TEST_true(EC_POINT_invert(group, P, ctx))\n        || !TEST_int_eq(0, EC_POINT_cmp(group, P, R, ctx))\n        || !TEST_true(BN_hex2bn(&p,                         "FFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF"))\n        || !TEST_int_eq(1, BN_is_prime_ex(p, BN_prime_checks, ctx, NULL))\n        || !TEST_true(BN_hex2bn(&a,                         "FFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC"))\n        || !TEST_true(BN_hex2bn(&b,                         "1C97BEFC"\n                                    "54BD7A8B65ACF89F81D4D4ADC565FA45"))\n        || !TEST_true(EC_GROUP_set_curve_GFp(group, p, a, b, ctx))\n        || !TEST_true(BN_hex2bn(&x,                         "4A96B568"\n                                    "8EF573284664698968C38BB913CBFC82"))\n        || !TEST_true(BN_hex2bn(&y,                         "23a62855"\n                                    "3168947d59dcc912042351377ac5fb32"))\n        || !TEST_true(BN_add(yplusone, y, BN_value_one()))\n        || !TEST_false(EC_POINT_set_affine_coordinates_GFp(group, P, x,\n                                                           yplusone, ctx))\n        || !TEST_true(EC_POINT_set_affine_coordinates_GFp(group, P, x, y, ctx))\n        || !TEST_int_gt(EC_POINT_is_on_curve(group, P, ctx), 0)\n        || !TEST_true(BN_hex2bn(&z,                       "0100000000"\n                                    "000000000001F4C8F927AED3CA752257"))\n        || !TEST_true(EC_GROUP_set_generator(group, P, z, BN_value_one()))\n        || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nSEC2 curve secp160r1 -- Generator:\\n     x = 0x");\n    BN_print(bio_out, x);\n    BIO_printf(bio_out, "\\n     y = 0x");\n    BN_print(bio_out, y);\n    BIO_printf(bio_out, "\\n");\n    if (!TEST_true(BN_hex2bn(&z,                         "23a62855"\n                                 "3168947d59dcc912042351377ac5fb32"))\n        || !TEST_int_eq(0, BN_cmp(y, z))\n        || !TEST_int_eq(EC_GROUP_get_degree(group), 160)\n        || !group_order_tests(group)\n        || !TEST_ptr(P_160 = EC_GROUP_new(EC_GROUP_method_of(group)))\n        || !TEST_true(EC_GROUP_copy(P_160, group))\n        || !TEST_true(BN_hex2bn(&p,                 "FFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF"))\n        || !TEST_int_eq(1, BN_is_prime_ex(p, BN_prime_checks, ctx, NULL))\n        || !TEST_true(BN_hex2bn(&a,                 "FFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC"))\n        || !TEST_true(BN_hex2bn(&b,                 "64210519E59C80E7"\n                                    "0FA7E9AB72243049FEB8DEECC146B9B1"))\n        || !TEST_true(EC_GROUP_set_curve_GFp(group, p, a, b, ctx))\n        || !TEST_true(BN_hex2bn(&x,                 "188DA80EB03090F6"\n                                    "7CBF20EB43A18800F4FF0AFD82FF1012"))\n        || !TEST_true(EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1,\n                                                              ctx))\n        || !TEST_int_gt(EC_POINT_is_on_curve(group, P, ctx), 0)\n        || !TEST_true(BN_hex2bn(&z,                 "FFFFFFFFFFFFFFFF"\n                                    "FFFFFFFF99DEF836146BC9B1B4D22831"))\n        || !TEST_true(EC_GROUP_set_generator(group, P, z, BN_value_one()))\n        || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nNIST curve P-192 -- Generator:\\n     x = 0x");\n    BN_print(bio_out, x);\n    BIO_printf(bio_out, "\\n     y = 0x");\n    BN_print(bio_out, y);\n    BIO_printf(bio_out, "\\n");\n    if (!TEST_true(BN_hex2bn(&z,                 "07192B95FFC8DA78"\n                                 "631011ED6B24CDD573F977A11E794811"))\n        || !TEST_int_eq(0, BN_cmp(y, z))\n        || !TEST_true(BN_add(yplusone, y, BN_value_one()))\n        || !TEST_false(EC_POINT_set_affine_coordinates_GFp(group, P, x,\n                                                           yplusone, ctx))\n        || !TEST_int_eq(EC_GROUP_get_degree(group), 192)\n        || !group_order_tests(group)\n        || !TEST_ptr(P_192 = EC_GROUP_new(EC_GROUP_method_of(group)))\n        || !TEST_true(EC_GROUP_copy(P_192, group))\n        || !TEST_true(BN_hex2bn(&p,         "FFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFF000000000000000000000001"))\n        || !TEST_int_eq(1, BN_is_prime_ex(p, BN_prime_checks, ctx, NULL))\n        || !TEST_true(BN_hex2bn(&a,         "FFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE"))\n        || !TEST_true(BN_hex2bn(&b,         "B4050A850C04B3ABF5413256"\n                                    "5044B0B7D7BFD8BA270B39432355FFB4"))\n        || !TEST_true(EC_GROUP_set_curve_GFp(group, p, a, b, ctx))\n        || !TEST_true(BN_hex2bn(&x,         "B70E0CBD6BB4BF7F321390B9"\n                                    "4A03C1D356C21122343280D6115C1D21"))\n        || !TEST_true(EC_POINT_set_compressed_coordinates_GFp(group, P, x, 0,\n                                                              ctx))\n        || !TEST_int_gt(EC_POINT_is_on_curve(group, P, ctx), 0)\n        || !TEST_true(BN_hex2bn(&z,         "FFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFF16A2E0B8F03E13DD29455C5C2A3D"))\n        || !TEST_true(EC_GROUP_set_generator(group, P, z, BN_value_one()))\n        || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nNIST curve P-224 -- Generator:\\n     x = 0x");\n    BN_print(bio_out, x);\n    BIO_printf(bio_out, "\\n     y = 0x");\n    BN_print(bio_out, y);\n    BIO_printf(bio_out, "\\n");\n    if (!TEST_true(BN_hex2bn(&z,         "BD376388B5F723FB4C22DFE6"\n                                 "CD4375A05A07476444D5819985007E34"))\n        || !TEST_int_eq(0, BN_cmp(y, z))\n        || !TEST_true(BN_add(yplusone, y, BN_value_one()))\n        || !TEST_false(EC_POINT_set_affine_coordinates_GFp(group, P, x,\n                                                           yplusone, ctx))\n        || !TEST_int_eq(EC_GROUP_get_degree(group), 224)\n        || !group_order_tests(group)\n        || !TEST_ptr(P_224 = EC_GROUP_new(EC_GROUP_method_of(group)))\n        || !TEST_true(EC_GROUP_copy(P_224, group))\n        || !TEST_true(BN_hex2bn(&p, "FFFFFFFF000000010000000000000000"\n                                    "00000000FFFFFFFFFFFFFFFFFFFFFFFF"))\n        || !TEST_int_eq(1, BN_is_prime_ex(p, BN_prime_checks, ctx, NULL))\n        || !TEST_true(BN_hex2bn(&a, "FFFFFFFF000000010000000000000000"\n                                    "00000000FFFFFFFFFFFFFFFFFFFFFFFC"))\n        || !TEST_true(BN_hex2bn(&b, "5AC635D8AA3A93E7B3EBBD55769886BC"\n                                    "651D06B0CC53B0F63BCE3C3E27D2604B"))\n        || !TEST_true(EC_GROUP_set_curve_GFp(group, p, a, b, ctx))\n        || !TEST_true(BN_hex2bn(&x, "6B17D1F2E12C4247F8BCE6E563A440F2"\n                                    "77037D812DEB33A0F4A13945D898C296"))\n        || !TEST_true(EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1,\n                                                              ctx))\n        || !TEST_int_gt(EC_POINT_is_on_curve(group, P, ctx), 0)\n        || !TEST_true(BN_hex2bn(&z, "FFFFFFFF00000000FFFFFFFFFFFFFFFF"\n                                    "BCE6FAADA7179E84F3B9CAC2FC632551"))\n        || !TEST_true(EC_GROUP_set_generator(group, P, z, BN_value_one()))\n        || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nNIST curve P-256 -- Generator:\\n     x = 0x");\n    BN_print(bio_out, x);\n    BIO_printf(bio_out, "\\n     y = 0x");\n    BN_print(bio_out, y);\n    BIO_printf(bio_out, "\\n");\n    if (!TEST_true(BN_hex2bn(&z, "4FE342E2FE1A7F9B8EE7EB4A7C0F9E16"\n                                 "2BCE33576B315ECECBB6406837BF51F5"))\n        || !TEST_int_eq(0, BN_cmp(y, z))\n        || !TEST_true(BN_add(yplusone, y, BN_value_one()))\n        || !TEST_false(EC_POINT_set_affine_coordinates_GFp(group, P, x,\n                                                           yplusone, ctx))\n        || !TEST_int_eq(EC_GROUP_get_degree(group), 256)\n        || !group_order_tests(group)\n        || !TEST_ptr(P_256 = EC_GROUP_new(EC_GROUP_method_of(group)))\n        || !TEST_true(EC_GROUP_copy(P_256, group))\n        || !TEST_true(BN_hex2bn(&p, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE"\n                                    "FFFFFFFF0000000000000000FFFFFFFF"))\n        || !TEST_int_eq(1, BN_is_prime_ex(p, BN_prime_checks, ctx, NULL))\n        || !TEST_true(BN_hex2bn(&a, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE"\n                                    "FFFFFFFF0000000000000000FFFFFFFC"))\n        || !TEST_true(BN_hex2bn(&b, "B3312FA7E23EE7E4988E056BE3F82D19"\n                                    "181D9C6EFE8141120314088F5013875A"\n                                    "C656398D8A2ED19D2A85C8EDD3EC2AEF"))\n        || !TEST_true(EC_GROUP_set_curve_GFp(group, p, a, b, ctx))\n        || !TEST_true(BN_hex2bn(&x, "AA87CA22BE8B05378EB1C71EF320AD74"\n                                    "6E1D3B628BA79B9859F741E082542A38"\n                                    "5502F25DBF55296C3A545E3872760AB7"))\n        || !TEST_true(EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1,\n                                                              ctx))\n        || !TEST_int_gt(EC_POINT_is_on_curve(group, P, ctx), 0)\n        || !TEST_true(BN_hex2bn(&z, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFC7634D81F4372DDF"\n                                    "581A0DB248B0A77AECEC196ACCC52973"))\n        || !TEST_true(EC_GROUP_set_generator(group, P, z, BN_value_one()))\n        || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nNIST curve P-384 -- Generator:\\n     x = 0x");\n    BN_print(bio_out, x);\n    BIO_printf(bio_out, "\\n     y = 0x");\n    BN_print(bio_out, y);\n    BIO_printf(bio_out, "\\n");\n    if (!TEST_true(BN_hex2bn(&z, "3617DE4A96262C6F5D9E98BF9292DC29"\n                                 "F8F41DBD289A147CE9DA3113B5F0B8C0"\n                                 "0A60B1CE1D7E819D7A431D7C90EA0E5F"))\n        || !TEST_int_eq(0, BN_cmp(y, z))\n        || !TEST_true(BN_add(yplusone, y, BN_value_one()))\n        || !TEST_false(EC_POINT_set_affine_coordinates_GFp(group, P, x,\n                                                           yplusone, ctx))\n        || !TEST_int_eq(EC_GROUP_get_degree(group), 384)\n        || !group_order_tests(group)\n        || !TEST_ptr(P_384 = EC_GROUP_new(EC_GROUP_method_of(group)))\n        || !TEST_true(EC_GROUP_copy(P_384, group))\n        || !TEST_true(BN_hex2bn(&p,                              "1FF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"))\n        || !TEST_int_eq(1, BN_is_prime_ex(p, BN_prime_checks, ctx, NULL))\n        || !TEST_true(BN_hex2bn(&a,                              "1FF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC"))\n        || !TEST_true(BN_hex2bn(&b,                              "051"\n                                    "953EB9618E1C9A1F929A21A0B68540EE"\n                                    "A2DA725B99B315F3B8B489918EF109E1"\n                                    "56193951EC7E937B1652C0BD3BB1BF07"\n                                    "3573DF883D2C34F1EF451FD46B503F00"))\n        || !TEST_true(EC_GROUP_set_curve_GFp(group, p, a, b, ctx))\n        || !TEST_true(BN_hex2bn(&x,                               "C6"\n                                    "858E06B70404E9CD9E3ECB662395B442"\n                                    "9C648139053FB521F828AF606B4D3DBA"\n                                    "A14B5E77EFE75928FE1DC127A2FFA8DE"\n                                    "3348B3C1856A429BF97E7E31C2E5BD66"))\n        || !TEST_true(EC_POINT_set_compressed_coordinates_GFp(group, P, x, 0,\n                                                              ctx))\n        || !TEST_int_gt(EC_POINT_is_on_curve(group, P, ctx), 0)\n        || !TEST_true(BN_hex2bn(&z,                              "1FF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"\n                                    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA"\n                                    "51868783BF2F966B7FCC0148F709A5D0"\n                                    "3BB5C9B8899C47AEBB6FB71E91386409"))\n        || !TEST_true(EC_GROUP_set_generator(group, P, z, BN_value_one()))\n        || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, P, x, y, ctx)))\n        goto err;\n    BIO_printf(bio_out, "\\nNIST curve P-521 -- Generator:\\n     x = 0x");\n    BN_print(bio_out, x);\n    BIO_printf(bio_out, "\\n     y = 0x");\n    BN_print(bio_out, y);\n    BIO_printf(bio_out, "\\n");\n    if (!TEST_true(BN_hex2bn(&z,                              "118"\n                                 "39296A789A3BC0045C8A5FB42C7D1BD9"\n                                 "98F54449579B446817AFBD17273E662C"\n                                 "97EE72995EF42640C550B9013FAD0761"\n                                 "353C7086A272C24088BE94769FD16650"))\n        || !TEST_int_eq(0, BN_cmp(y, z))\n        || !TEST_true(BN_add(yplusone, y, BN_value_one()))\n        || !TEST_false(EC_POINT_set_affine_coordinates_GFp(group, P, x,\n                                                           yplusone, ctx))\n        || !TEST_int_eq(EC_GROUP_get_degree(group), 521)\n        || !group_order_tests(group)\n        || !TEST_ptr(P_521 = EC_GROUP_new(EC_GROUP_method_of(group)))\n        || !TEST_true(EC_GROUP_copy(P_521, group))\n        || !TEST_true(EC_POINT_set_affine_coordinates_GFp(group, P, x, y, ctx))\n        || !TEST_true(EC_POINT_copy(Q, P))\n        || !TEST_false(EC_POINT_is_at_infinity(group, Q))\n        || !TEST_true(EC_POINT_dbl(group, P, P, ctx))\n        || !TEST_int_gt(EC_POINT_is_on_curve(group, P, ctx), 0)\n        || !TEST_true(EC_POINT_invert(group, Q, ctx))\n        || !TEST_true(EC_POINT_add(group, R, P, Q, ctx))\n        || !TEST_true(EC_POINT_add(group, R, R, Q, ctx))\n        || !TEST_true(EC_POINT_is_at_infinity(group, R))\n        || !TEST_false(EC_POINT_is_at_infinity(group, Q)))\n        goto err;\n    points[0] = Q;\n    points[1] = Q;\n    points[2] = Q;\n    points[3] = Q;\n    if (!TEST_true(EC_GROUP_get_order(group, z, ctx))\n        || !TEST_true(BN_add(y, z, BN_value_one()))\n        || !TEST_false(BN_is_odd(y))\n        || !TEST_true(BN_rshift1(y, y)))\n        goto err;\n    scalars[0] = y;\n    scalars[1] = y;\n    BIO_printf(bio_out, "combined multiplication ...");\n    if (!TEST_true(EC_POINTs_mul(group, P, NULL, 2, points, scalars, ctx))\n        || !TEST_true(EC_POINTs_mul(group, R, z, 2, points, scalars, ctx))\n        || !TEST_int_eq(0, EC_POINT_cmp(group, P, R, ctx))\n        || !TEST_int_eq(0, EC_POINT_cmp(group, R, Q, ctx))\n        || !TEST_true(BN_pseudo_rand(y, BN_num_bits(y), 0, 0))\n        || !TEST_true(BN_add(z, z, y)))\n        goto err;\n    BN_set_negative(z, 1);\n    scalars[0] = y;\n    scalars[1] = z;\n    if (!TEST_true(EC_POINTs_mul(group, P, NULL, 2, points, scalars, ctx))\n        || !TEST_true(EC_POINT_is_at_infinity(group, P))\n        || !TEST_true(BN_pseudo_rand(x, BN_num_bits(y) - 1, 0, 0))\n        || !TEST_true(BN_add(z, x, y)))\n        goto err;\n    BN_set_negative(z, 1);\n    scalars[0] = x;\n    scalars[1] = y;\n    scalars[2] = z;\n    if (!TEST_ptr(scalar3 = BN_new()))\n        goto err;\n    BN_zero(scalar3);\n    scalars[3] = scalar3;\n    if (!TEST_true(EC_POINTs_mul(group, P, NULL, 4, points, scalars, ctx))\n        || !TEST_true(EC_POINT_is_at_infinity(group, P)))\n        goto err;\n    BIO_printf(bio_out, " ok\\n\\n");\n    r = 1;\nerr:\n    BN_CTX_free(ctx);\n    BN_free(p);\n    BN_free(a);\n    BN_free(b);\n    EC_GROUP_free(group);\n    EC_GROUP_free(tmp);\n    EC_POINT_free(P);\n    EC_POINT_free(Q);\n    EC_POINT_free(R);\n    BN_free(x);\n    BN_free(y);\n    BN_free(z);\n    BN_free(yplusone);\n    BN_free(scalar3);\n    EC_GROUP_free(P_160);\n    EC_GROUP_free(P_192);\n    EC_GROUP_free(P_224);\n    EC_GROUP_free(P_256);\n    EC_GROUP_free(P_384);\n    EC_GROUP_free(P_521);\n    return r;\n}', 'int BN_num_bits(const BIGNUM *a)\n{\n    int i = a->top - 1;\n    bn_check_top(a);\n    if (BN_is_zero(a))\n        return 0;\n    return ((i * BN_BITS2) + BN_num_bits_word(a->d[i]));\n}', 'int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom)\n{\n    return bnrand(1, rnd, bits, top, bottom);\n}', 'static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom)\n{\n    unsigned char *buf = NULL;\n    int ret = 0, bit, bytes, mask;\n    time_t tim;\n    if (bits == 0) {\n        if (top != BN_RAND_TOP_ANY || bottom != BN_RAND_BOTTOM_ANY)\n            goto toosmall;\n        BN_zero(rnd);\n        return 1;\n    }\n    if (bits < 0 || (bits == 1 && top > 0))\n        goto toosmall;\n    bytes = (bits + 7) / 8;\n    bit = (bits - 1) % 8;\n    mask = 0xff << (bit + 1);\n    buf = OPENSSL_malloc(bytes);\n    if (buf == NULL) {\n        BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);\n        goto err;\n    }\n    time(&tim);\n    RAND_add(&tim, sizeof(tim), 0.0);\n    if (RAND_bytes(buf, bytes) <= 0)\n        goto err;\n    if (pseudorand == 2) {\n        int i;\n        unsigned char c;\n        for (i = 0; i < bytes; i++) {\n            if (RAND_bytes(&c, 1) <= 0)\n                goto err;\n            if (c >= 128 && i > 0)\n                buf[i] = buf[i - 1];\n            else if (c < 42)\n                buf[i] = 0;\n            else if (c < 84)\n                buf[i] = 255;\n        }\n    }\n    if (top >= 0) {\n        if (top) {\n            if (bit == 0) {\n                buf[0] = 1;\n                buf[1] |= 0x80;\n            } else {\n                buf[0] |= (3 << (bit - 1));\n            }\n        } else {\n            buf[0] |= (1 << bit);\n        }\n    }\n    buf[0] &= ~mask;\n    if (bottom)\n        buf[bytes - 1] |= 1;\n    if (!BN_bin2bn(buf, bytes, rnd))\n        goto err;\n    ret = 1;\n err:\n    OPENSSL_clear_free(buf, bytes);\n    bn_check_top(rnd);\n    return (ret);\ntoosmall:\n    BNerr(BN_F_BNRAND, BN_R_BITS_TOO_SMALL);\n    return 0;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    if (malloc_impl != NULL && malloc_impl != CRYPTO_malloc)\n        return malloc_impl(num, file, line);\n    if (num == 0)\n        return NULL;\n    FAILTEST();\n    allow_customize = 0;\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);\n        ret = malloc(num);\n        CRYPTO_mem_debug_malloc(ret, num, 1, file, line);\n    } else {\n        ret = malloc(num);\n    }\n#else\n    osslargused(file); osslargused(line);\n    ret = malloc(num);\n#endif\n    return ret;\n}']