test/bn_internal_test.c:37: error: BUFFER_OVERRUN_L3
  Offset: [1, +oo] Size: [0, 8388607] by call to `bn_miller_rabin_is_prime`.
Showing all 12 steps of the trace


test/bn_internal_test.c:35:14: Call
33.       ret = TEST_ptr(bn = BN_new())
34.             /* test passing a prime returns the correct status */
35.             && TEST_true(BN_set_word(bn, 11))
                   ^
36.             /* return extra parameters related to composite */
37.             && TEST_true(bn_miller_rabin_is_prime(bn, 10, ctx, NULL, 1, &status))

crypto/bn/bn_lib.c:359:1: Parameter `*a->d`
  357.   }
  358.   
  359. > int BN_set_word(BIGNUM *a, BN_ULONG w)
  360.   {
  361.       bn_check_top(a);

crypto/bn/bn_lib.c:362:9: Call
  360.   {
  361.       bn_check_top(a);
  362.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                 ^
  363.           return 0;
  364.       a->neg = 0;

crypto/bn/bn_lcl.h:660:1: Parameter `*a->d`
    658.                            const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx);
    659.   
    660. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
    661.   {
    662.       if (bits > (INT_MAX - BN_BITS2 + 1))

test/bn_internal_test.c:37:14: Call
35.             && TEST_true(BN_set_word(bn, 11))
36.             /* return extra parameters related to composite */
37.             && TEST_true(bn_miller_rabin_is_prime(bn, 10, ctx, NULL, 1, &status))
                   ^
38.             && TEST_int_eq(status, BN_PRIMETEST_PROBABLY_PRIME);
39.       BN_free(bn);

crypto/bn/bn_prime.c:249:1: Parameter `*w->d`
  247.    * returns 0 if there was an error, otherwise it returns 1.
  248.    */
  249. > int bn_miller_rabin_is_prime(const BIGNUM *w, int iterations, BN_CTX *ctx,
  250.                                BN_GENCB *cb, int enhanced, int *status)
  251.   {

crypto/bn/bn_prime.c:316:14: Call
  314.           }
  315.           /* (Step 4.5) z = b^m mod w */
  316.           if (!BN_mod_exp_mont(z, b, m, w, ctx, mont))
                      ^
  317.               goto err;
  318.           /* (Step 4.6) if (z = 1 or z = w-1) */

crypto/bn/bn_exp.c:388:14: <Offset trace>
386.           /* 2^(top*BN_BITS2) - m */
387.           r->d[0] = (0 - m->d[0]) & BN_MASK2;
388.           for (i = 1; i < j; i++)
                    ^
389.               r->d[i] = (~m->d[i]) & BN_MASK2;
390.           r->top = j;

crypto/bn/bn_exp.c:388:14: Assignment
    386.           /* 2^(top*BN_BITS2) - m */
    387.           r->d[0] = (0 - m->d[0]) & BN_MASK2;
    388.           for (i = 1; i < j; i++)
                        ^
    389.               r->d[i] = (~m->d[i]) & BN_MASK2;
    390.           r->top = j;

crypto/bn/bn_exp.c:296:1: <Length trace>
294.   }
295.   
296. > int BN_mod_exp_mont(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
297.                       const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
298.   {

crypto/bn/bn_exp.c:296:1: Parameter `*m->d`
    294.   }
    295.   
    296. > int BN_mod_exp_mont(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
    297.                       const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
    298.   {

crypto/bn/bn_exp.c:389:25: Array access: Offset: [1, +oo] Size: [0, 8388607] by call to `bn_miller_rabin_is_prime` 
    387.           r->d[0] = (0 - m->d[0]) & BN_MASK2;
    388.           for (i = 1; i < j; i++)
    389.               r->d[i] = (~m->d[i]) & BN_MASK2;
                                   ^
    390.           r->top = j;
    391.           r->flags |= BN_FLG_FIXED_TOP;

int BN_mod_exp_mont(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
                    const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
{
    int i, j, bits, ret = 0, wstart, wend, window, wvalue;
    int start = 1;
    BIGNUM *d, *r;
    const BIGNUM *aa;
    BIGNUM *val[TABLE_SIZE];
    BN_MONT_CTX *mont = NULL;
    if (BN_get_flags(p, BN_FLG_CONSTTIME) != 0
            || BN_get_flags(a, BN_FLG_CONSTTIME) != 0
            || BN_get_flags(m, BN_FLG_CONSTTIME) != 0) {
        return BN_mod_exp_mont_consttime(rr, a, p, m, ctx, in_mont);
    }
    bn_check_top(a);
    bn_check_top(p);
    bn_check_top(m);
    if (!BN_is_odd(m)) {
        BNerr(BN_F_BN_MOD_EXP_MONT, BN_R_CALLED_WITH_EVEN_MODULUS);
        return 0;
    }
    bits = BN_num_bits(p);
    if (bits == 0) {
        if (BN_abs_is_word(m, 1)) {
            ret = 1;
            BN_zero(rr);
        } else {
            ret = BN_one(rr);
        }
        return ret;
    }
    BN_CTX_start(ctx);
    d = BN_CTX_get(ctx);
    r = BN_CTX_get(ctx);
    val[0] = BN_CTX_get(ctx);
    if (val[0] == NULL)
        goto err;
    if (in_mont != NULL)
        mont = in_mont;
    else {
        if ((mont = BN_MONT_CTX_new()) == NULL)
            goto err;
        if (!BN_MONT_CTX_set(mont, m, ctx))
            goto err;
    }
    if (a->neg || BN_ucmp(a, m) >= 0) {
        if (!BN_nnmod(val[0], a, m, ctx))
            goto err;
        aa = val[0];
    } else
        aa = a;
    if (!bn_to_mont_fixed_top(val[0], aa, mont, ctx))
        goto err;
    window = BN_window_bits_for_exponent_size(bits);
    if (window > 1) {
        if (!bn_mul_mont_fixed_top(d, val[0], val[0], mont, ctx))
            goto err;
        j = 1 << (window - 1);
        for (i = 1; i < j; i++) {
            if (((val[i] = BN_CTX_get(ctx)) == NULL) ||
                !bn_mul_mont_fixed_top(val[i], val[i - 1], d, mont, ctx))
                goto err;
        }
    }
    start = 1;
    wvalue = 0;
    wstart = bits - 1;
    wend = 0;
#if 1
    j = m->top;
    if (m->d[j - 1] & (((BN_ULONG)1) << (BN_BITS2 - 1))) {
        if (bn_wexpand(r, j) == NULL)
            goto err;
        r->d[0] = (0 - m->d[0]) & BN_MASK2;
        for (i = 1; i < j; i++)
            r->d[i] = (~m->d[i]) & BN_MASK2;
        r->top = j;
        r->flags |= BN_FLG_FIXED_TOP;
    } else
#endif
    if (!bn_to_mont_fixed_top(r, BN_value_one(), mont, ctx))
        goto err;
    for (;;) {
        if (BN_is_bit_set(p, wstart) == 0) {
            if (!start) {
                if (!bn_mul_mont_fixed_top(r, r, r, mont, ctx))
                    goto err;
            }
            if (wstart == 0)
                break;
            wstart--;
            continue;
        }
        j = wstart;
        wvalue = 1;
        wend = 0;
        for (i = 1; i < window; i++) {
            if (wstart - i < 0)
                break;
            if (BN_is_bit_set(p, wstart - i)) {
                wvalue <<= (i - wend);
                wvalue |= 1;
                wend = i;
            }
        }
        j = wend + 1;
        if (!start)
            for (i = 0; i < j; i++) {
                if (!bn_mul_mont_fixed_top(r, r, r, mont, ctx))
                    goto err;
            }
        if (!bn_mul_mont_fixed_top(r, r, val[wvalue >> 1], mont, ctx))
            goto err;
        wstart -= wend + 1;
        wvalue = 0;
        start = 0;
        if (wstart < 0)
            break;
    }
#if defined(SPARC_T4_MONT)
    if (OPENSSL_sparcv9cap_P[0] & (SPARCV9_VIS3 | SPARCV9_PREFER_FPU)) {
        j = mont->N.top;
        val[0]->d[0] = 1;
        for (i = 1; i < j; i++)
            val[0]->d[i] = 0;
        val[0]->top = j;
        if (!BN_mod_mul_montgomery(rr, r, val[0], mont, ctx))
            goto err;
    } else
#endif
    if (!BN_from_montgomery(rr, r, mont, ctx))
        goto err;
    ret = 1;
 err:
    if (in_mont == NULL)
        BN_MONT_CTX_free(mont);
    BN_CTX_end(ctx);
    bn_check_top(rr);
    return ret;
}
['static int test_is_prime_enhanced(void)\n{\n    int ret;\n    int status = 0;\n    BIGNUM *bn = NULL;\n    ret = TEST_ptr(bn = BN_new())\n          && TEST_true(BN_set_word(bn, 11))\n          && TEST_true(bn_miller_rabin_is_prime(bn, 10, ctx, NULL, 1, &status))\n          && TEST_int_eq(status, BN_PRIMETEST_PROBABLY_PRIME);\n    BN_free(bn);\n    return ret;\n}', 'int BN_set_word(BIGNUM *a, BN_ULONG w)\n{\n    bn_check_top(a);\n    if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)\n        return 0;\n    a->neg = 0;\n    a->d[0] = w;\n    a->top = (w ? 1 : 0);\n    a->flags &= ~BN_FLG_FIXED_TOP;\n    bn_check_top(a);\n    return 1;\n}', 'static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)\n{\n    if (bits > (INT_MAX - BN_BITS2 + 1))\n        return NULL;\n    if (((bits+BN_BITS2-1)/BN_BITS2) <= (a)->dmax)\n        return a;\n    return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);\n}', 'int bn_miller_rabin_is_prime(const BIGNUM *w, int iterations, BN_CTX *ctx,\n                             BN_GENCB *cb, int enhanced, int *status)\n{\n    int i, j, a, ret = 0;\n    BIGNUM *g, *w1, *w3, *x, *m, *z, *b;\n    BN_MONT_CTX *mont = NULL;\n    if (!BN_is_odd(w))\n        return 0;\n    BN_CTX_start(ctx);\n    g = BN_CTX_get(ctx);\n    w1 = BN_CTX_get(ctx);\n    w3 = BN_CTX_get(ctx);\n    x = BN_CTX_get(ctx);\n    m = BN_CTX_get(ctx);\n    z = BN_CTX_get(ctx);\n    b = BN_CTX_get(ctx);\n    if (!(b != NULL\n            && BN_copy(w1, w)\n            && BN_sub_word(w1, 1)\n            && BN_copy(w3, w)\n            && BN_sub_word(w3, 3)))\n        goto err;\n    if (BN_is_zero(w3) || BN_is_negative(w3))\n        goto err;\n    a = 1;\n    while (!BN_is_bit_set(w1, a))\n        a++;\n    if (!BN_rshift(m, w1, a))\n        goto err;\n    mont = BN_MONT_CTX_new();\n    if (mont == NULL || !BN_MONT_CTX_set(mont, w, ctx))\n        goto err;\n    if (iterations == BN_prime_checks)\n        iterations = BN_prime_checks_for_size(BN_num_bits(w));\n    for (i = 0; i < iterations; ++i) {\n        if (!BN_priv_rand_range(b, w3) || !BN_add_word(b, 2))\n            goto err;\n        if (enhanced) {\n            if (!BN_gcd(g, b, w, ctx))\n                goto err;\n            if (!BN_is_one(g)) {\n                *status = BN_PRIMETEST_COMPOSITE_WITH_FACTOR;\n                ret = 1;\n                goto err;\n            }\n        }\n        if (!BN_mod_exp_mont(z, b, m, w, ctx, mont))\n            goto err;\n        if (BN_is_one(z) || BN_cmp(z, w1) == 0)\n            goto outer_loop;\n        for (j = 1; j < a ; ++j) {\n            if (!BN_copy(x, z) || !BN_mod_mul(z, x, x, w, ctx))\n                goto err;\n            if (BN_cmp(z, w1) == 0)\n                goto outer_loop;\n            if (BN_is_one(z))\n                goto composite;\n        }\n        if (!BN_GENCB_call(cb, 1, i))\n            goto err;\n        if (!BN_copy(x, z) || !BN_mod_mul(z, x, x, w, ctx))\n            goto err;\n        if (BN_is_one(z))\n            goto composite;\n        if (!BN_copy(x, z))\n            goto err;\ncomposite:\n        if (enhanced) {\n            if (!BN_sub_word(x, 1) || !BN_gcd(g, x, w, ctx))\n                goto err;\n            if (BN_is_one(g))\n                *status = BN_PRIMETEST_COMPOSITE_NOT_POWER_OF_PRIME;\n            else\n                *status = BN_PRIMETEST_COMPOSITE_WITH_FACTOR;\n        } else {\n            *status = BN_PRIMETEST_COMPOSITE;\n        }\n        ret = 1;\n        goto err;\nouter_loop: ;\n    }\n    *status = BN_PRIMETEST_PROBABLY_PRIME;\n    ret = 1;\nerr:\n    BN_clear(g);\n    BN_clear(w1);\n    BN_clear(w3);\n    BN_clear(x);\n    BN_clear(m);\n    BN_clear(z);\n    BN_clear(b);\n    BN_CTX_end(ctx);\n    BN_MONT_CTX_free(mont);\n    return ret;\n}', 'int BN_mod_exp_mont(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,\n                    const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)\n{\n    int i, j, bits, ret = 0, wstart, wend, window, wvalue;\n    int start = 1;\n    BIGNUM *d, *r;\n    const BIGNUM *aa;\n    BIGNUM *val[TABLE_SIZE];\n    BN_MONT_CTX *mont = NULL;\n    if (BN_get_flags(p, BN_FLG_CONSTTIME) != 0\n            || BN_get_flags(a, BN_FLG_CONSTTIME) != 0\n            || BN_get_flags(m, BN_FLG_CONSTTIME) != 0) {\n        return BN_mod_exp_mont_consttime(rr, a, p, m, ctx, in_mont);\n    }\n    bn_check_top(a);\n    bn_check_top(p);\n    bn_check_top(m);\n    if (!BN_is_odd(m)) {\n        BNerr(BN_F_BN_MOD_EXP_MONT, BN_R_CALLED_WITH_EVEN_MODULUS);\n        return 0;\n    }\n    bits = BN_num_bits(p);\n    if (bits == 0) {\n        if (BN_abs_is_word(m, 1)) {\n            ret = 1;\n            BN_zero(rr);\n        } else {\n            ret = BN_one(rr);\n        }\n        return ret;\n    }\n    BN_CTX_start(ctx);\n    d = BN_CTX_get(ctx);\n    r = BN_CTX_get(ctx);\n    val[0] = BN_CTX_get(ctx);\n    if (val[0] == NULL)\n        goto err;\n    if (in_mont != NULL)\n        mont = in_mont;\n    else {\n        if ((mont = BN_MONT_CTX_new()) == NULL)\n            goto err;\n        if (!BN_MONT_CTX_set(mont, m, ctx))\n            goto err;\n    }\n    if (a->neg || BN_ucmp(a, m) >= 0) {\n        if (!BN_nnmod(val[0], a, m, ctx))\n            goto err;\n        aa = val[0];\n    } else\n        aa = a;\n    if (!bn_to_mont_fixed_top(val[0], aa, mont, ctx))\n        goto err;\n    window = BN_window_bits_for_exponent_size(bits);\n    if (window > 1) {\n        if (!bn_mul_mont_fixed_top(d, val[0], val[0], mont, ctx))\n            goto err;\n        j = 1 << (window - 1);\n        for (i = 1; i < j; i++) {\n            if (((val[i] = BN_CTX_get(ctx)) == NULL) ||\n                !bn_mul_mont_fixed_top(val[i], val[i - 1], d, mont, ctx))\n                goto err;\n        }\n    }\n    start = 1;\n    wvalue = 0;\n    wstart = bits - 1;\n    wend = 0;\n#if 1\n    j = m->top;\n    if (m->d[j - 1] & (((BN_ULONG)1) << (BN_BITS2 - 1))) {\n        if (bn_wexpand(r, j) == NULL)\n            goto err;\n        r->d[0] = (0 - m->d[0]) & BN_MASK2;\n        for (i = 1; i < j; i++)\n            r->d[i] = (~m->d[i]) & BN_MASK2;\n        r->top = j;\n        r->flags |= BN_FLG_FIXED_TOP;\n    } else\n#endif\n    if (!bn_to_mont_fixed_top(r, BN_value_one(), mont, ctx))\n        goto err;\n    for (;;) {\n        if (BN_is_bit_set(p, wstart) == 0) {\n            if (!start) {\n                if (!bn_mul_mont_fixed_top(r, r, r, mont, ctx))\n                    goto err;\n            }\n            if (wstart == 0)\n                break;\n            wstart--;\n            continue;\n        }\n        j = wstart;\n        wvalue = 1;\n        wend = 0;\n        for (i = 1; i < window; i++) {\n            if (wstart - i < 0)\n                break;\n            if (BN_is_bit_set(p, wstart - i)) {\n                wvalue <<= (i - wend);\n                wvalue |= 1;\n                wend = i;\n            }\n        }\n        j = wend + 1;\n        if (!start)\n            for (i = 0; i < j; i++) {\n                if (!bn_mul_mont_fixed_top(r, r, r, mont, ctx))\n                    goto err;\n            }\n        if (!bn_mul_mont_fixed_top(r, r, val[wvalue >> 1], mont, ctx))\n            goto err;\n        wstart -= wend + 1;\n        wvalue = 0;\n        start = 0;\n        if (wstart < 0)\n            break;\n    }\n#if defined(SPARC_T4_MONT)\n    if (OPENSSL_sparcv9cap_P[0] & (SPARCV9_VIS3 | SPARCV9_PREFER_FPU)) {\n        j = mont->N.top;\n        val[0]->d[0] = 1;\n        for (i = 1; i < j; i++)\n            val[0]->d[i] = 0;\n        val[0]->top = j;\n        if (!BN_mod_mul_montgomery(rr, r, val[0], mont, ctx))\n            goto err;\n    } else\n#endif\n    if (!BN_from_montgomery(rr, r, mont, ctx))\n        goto err;\n    ret = 1;\n err:\n    if (in_mont == NULL)\n        BN_MONT_CTX_free(mont);\n    BN_CTX_end(ctx);\n    bn_check_top(rr);\n    return ret;\n}']