test/ecdsatest.c:144: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_dec2bn`.
Showing all 26 steps of the trace


test/ecdsatest.c:127:10: Call
125.   
126.       /* create the key */
127.       if (!TEST_ptr(key = EC_KEY_new_by_curve_name(nid)))
                ^
128.           goto x962_int_err;
129.       use_fake = 1;

crypto/ec/ec_key.c:28:18: Call
  26.       if (ret == NULL)
  27.           return NULL;
  28.       ret->group = EC_GROUP_new_by_curve_name(nid);
                         ^
  29.       if (ret->group == NULL) {
  30.           EC_KEY_free(ret);

crypto/ec/ec_curve.c:3082:19: Call
    3080.       for (i = 0; i < curve_list_length; i++)
    3081.           if (curve_list[i].nid == nid) {
    3082.               ret = ec_group_new_from_data(curve_list[i]);
                              ^
    3083.               break;
    3084.           }

crypto/ec/ec_curve.c:2995:14: Call
      2993.       params += seed_len;         /* skip seed */
      2994.   
      2995.       if ((p = BN_bin2bn(params + 0 * param_len, param_len, NULL)) == NULL
                           ^
      2996.           || (a = BN_bin2bn(params + 1 * param_len, param_len, NULL)) == NULL
      2997.           || (b = BN_bin2bn(params + 2 * param_len, param_len, NULL)) == NULL) {

crypto/bn/bn_lib.c:410:1: Parameter `ret->top`
        408.   }
        409.   
        410. > BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)
        411.   {
        412.       unsigned int i, m;

test/ecdsatest.c:144:10: Call
142.       if (!TEST_ptr(r = BN_new()) || !TEST_ptr(s = BN_new()))
143.           goto x962_int_err;
144.       if (!TEST_true(BN_dec2bn(&r, r_in)) || !TEST_true(BN_dec2bn(&s, s_in)))
                ^
145.           goto x962_int_err;
146.       ECDSA_SIG_get0(signature, &sig_r, &sig_s);

crypto/bn/bn_print.c:199:1: Parameter `(*bn)->top`
  197.   }
  198.   
  199. > int BN_dec2bn(BIGNUM **bn, const char *a)
  200.   {
  201.       BIGNUM *ret = NULL;

crypto/bn/bn_print.c:232:9: Call
  230.       } else {
  231.           ret = *bn;
  232.           BN_zero(ret);
                 ^
  233.       }
  234.   

crypto/bn/bn_lib.c:398:1: Parameter `a->top`
    396.   }
    397.   
    398. > int BN_set_word(BIGNUM *a, BN_ULONG w)
    399.   {
    400.       bn_check_top(a);

crypto/bn/bn_lib.c:401:9: Call
    399.   {
    400.       bn_check_top(a);
    401.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                   ^
    402.           return (0);
    403.       a->neg = 0;

crypto/bn/bn_lcl.h:658:1: Parameter `a->top`
      656.                            const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx);
      657.   
      658. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
      659.   {
      660.       if (bits > (INT_MAX - BN_BITS2 + 1))

crypto/bn/bn_lcl.h:666:12: Call
      664.           return a;
      665.   
      666.       return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);
                        ^
      667.   }
      668.   

crypto/bn/bn_lib.c:284:1: Parameter `b->top`
        282.    */
        283.   
        284. > BIGNUM *bn_expand2(BIGNUM *b, int words)
        285.   {
        286.       bn_check_top(b);

crypto/bn/bn_lib.c:289:23: Call
        287.   
        288.       if (words > b->dmax) {
        289.           BN_ULONG *a = bn_expand_internal(b, words);
                                     ^
        290.           if (!a)
        291.               return NULL;

crypto/bn/bn_lib.c:246:1: <Offset trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `b->top`
          244.   /* This is used by bn_expand2() */
          245.   /* The caller MUST check that words > b->dmax before calling this */
          246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
          247.   {
          248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: <Length trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `words`
          244.   /* This is used by bn_expand2() */
          245.   /* The caller MUST check that words > b->dmax before calling this */
          246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
          247.   {
          248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:263:13: Call
          261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
          262.       else
          263.           a = OPENSSL_zalloc(words * sizeof(*a));
                             ^
          264.       if (a == NULL) {
          265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/mem.c:198:1: Parameter `num`
            196.   }
            197.   
            198. > void *CRYPTO_zalloc(size_t num, const char *file, int line)
            199.   {
            200.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:200:17: Call
            198.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
            199.   {
            200.       void *ret = CRYPTO_malloc(num, file, line);
                                   ^
            201.   
            202.       FAILTEST();

crypto/mem.c:178:9: Assignment
              176.   
              177.       if (num == 0)
              178.           return NULL;
                             ^
              179.   
              180.       FAILTEST();

crypto/mem.c:200:5: Assignment
            198.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
            199.   {
            200.       void *ret = CRYPTO_malloc(num, file, line);
                       ^
            201.   
            202.       FAILTEST();

crypto/mem.c:205:5: Assignment
            203.       if (ret != NULL)
            204.           memset(ret, 0, num);
            205.       return ret;
                       ^
            206.   }
            207.   

crypto/bn/bn_lib.c:263:9: Assignment
          261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
          262.       else
          263.           a = OPENSSL_zalloc(words * sizeof(*a));
                         ^
          264.       if (a == NULL) {
          265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/bn/bn_lib.c:271:9: Array access: Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_dec2bn` 
          269.       assert(b->top <= words);
          270.       if (b->top > 0)
          271.           memcpy(a, b->d, sizeof(*a) * b->top);
                         ^
          272.   
          273.       return a;

static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
{
    BN_ULONG *a = NULL;
    bn_check_top(b);
    if (words > (INT_MAX / (4 * BN_BITS2))) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);
        return NULL;
    }
    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
        return (NULL);
    }
    if (BN_get_flags(b, BN_FLG_SECURE))
        a = OPENSSL_secure_zalloc(words * sizeof(*a));
    else
        a = OPENSSL_zalloc(words * sizeof(*a));
    if (a == NULL) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);
        return (NULL);
    }
    assert(b->top <= words);
    if (b->top > 0)
        memcpy(a, b->d, sizeof(*a) * b->top);
    return a;
}
['static int x9_62_test_internal(int nid, const char *r_in, const char *s_in)\n{\n    int ret = 0;\n    const char message[] = "abc";\n    unsigned char digest[20];\n    unsigned int dgst_len = 0;\n    EVP_MD_CTX *md_ctx;\n    EC_KEY *key = NULL;\n    ECDSA_SIG *signature = NULL;\n    BIGNUM *r = NULL, *s = NULL;\n    BIGNUM *kinv = NULL, *rp = NULL;\n    const BIGNUM *sig_r, *sig_s;\n    if (!TEST_ptr(md_ctx = EVP_MD_CTX_new()))\n        goto x962_int_err;\n    if (!TEST_true(EVP_DigestInit(md_ctx, EVP_sha1()))\n        || !TEST_true(EVP_DigestUpdate(md_ctx, (const void *)message, 3))\n        || !TEST_true(EVP_DigestFinal(md_ctx, digest, &dgst_len)))\n        goto x962_int_err;\n    TEST_info("testing %s", OBJ_nid2sn(nid));\n    if (!TEST_ptr(key = EC_KEY_new_by_curve_name(nid)))\n        goto x962_int_err;\n    use_fake = 1;\n    if (!TEST_true(EC_KEY_generate_key(key)))\n        goto x962_int_err;\n    use_fake = 1;\n    if (!TEST_true(ECDSA_sign_setup(key, NULL, &kinv, &rp)))\n        goto x962_int_err;\n    if (!TEST_ptr(signature = ECDSA_do_sign_ex(digest, 20, kinv, rp, key)))\n        goto x962_int_err;\n    if (!TEST_ptr(r = BN_new()) || !TEST_ptr(s = BN_new()))\n        goto x962_int_err;\n    if (!TEST_true(BN_dec2bn(&r, r_in)) || !TEST_true(BN_dec2bn(&s, s_in)))\n        goto x962_int_err;\n    ECDSA_SIG_get0(signature, &sig_r, &sig_s);\n    if (!TEST_BN_eq(sig_r, r)\n            || !TEST_BN_eq(sig_s, s))\n        goto x962_int_err;\n    if (!TEST_int_eq(ECDSA_do_verify(digest, 20, signature, key), 1))\n        goto x962_int_err;\n    ret = 1;\n x962_int_err:\n    EC_KEY_free(key);\n    ECDSA_SIG_free(signature);\n    BN_free(r);\n    BN_free(s);\n    EVP_MD_CTX_free(md_ctx);\n    BN_clear_free(kinv);\n    BN_clear_free(rp);\n    return ret;\n}', 'EC_KEY *EC_KEY_new_by_curve_name(int nid)\n{\n    EC_KEY *ret = EC_KEY_new();\n    if (ret == NULL)\n        return NULL;\n    ret->group = EC_GROUP_new_by_curve_name(nid);\n    if (ret->group == NULL) {\n        EC_KEY_free(ret);\n        return NULL;\n    }\n    if (ret->meth->set_group != NULL\n        && ret->meth->set_group(ret, ret->group) == 0) {\n        EC_KEY_free(ret);\n        return NULL;\n    }\n    return ret;\n}', 'EC_GROUP *EC_GROUP_new_by_curve_name(int nid)\n{\n    size_t i;\n    EC_GROUP *ret = NULL;\n    if (nid <= 0)\n        return NULL;\n    for (i = 0; i < curve_list_length; i++)\n        if (curve_list[i].nid == nid) {\n            ret = ec_group_new_from_data(curve_list[i]);\n            break;\n        }\n    if (ret == NULL) {\n        ECerr(EC_F_EC_GROUP_NEW_BY_CURVE_NAME, EC_R_UNKNOWN_GROUP);\n        return NULL;\n    }\n    EC_GROUP_set_curve_name(ret, nid);\n    return ret;\n}', 'static EC_GROUP *ec_group_new_from_data(const ec_list_element curve)\n{\n    EC_GROUP *group = NULL;\n    EC_POINT *P = NULL;\n    BN_CTX *ctx = NULL;\n    BIGNUM *p = NULL, *a = NULL, *b = NULL, *x = NULL, *y = NULL, *order =\n        NULL;\n    int ok = 0;\n    int seed_len, param_len;\n    const EC_METHOD *meth;\n    const EC_CURVE_DATA *data;\n    const unsigned char *params;\n    if (curve.data == NULL)\n        return EC_GROUP_new(curve.meth != NULL ? curve.meth() : NULL);\n    if ((ctx = BN_CTX_new()) == NULL) {\n        ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_MALLOC_FAILURE);\n        goto err;\n    }\n    data = curve.data;\n    seed_len = data->seed_len;\n    param_len = data->param_len;\n    params = (const unsigned char *)(data + 1);\n    params += seed_len;\n    if ((p = BN_bin2bn(params + 0 * param_len, param_len, NULL)) == NULL\n        || (a = BN_bin2bn(params + 1 * param_len, param_len, NULL)) == NULL\n        || (b = BN_bin2bn(params + 2 * param_len, param_len, NULL)) == NULL) {\n        ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_BN_LIB);\n        goto err;\n    }\n    if (curve.meth != 0) {\n        meth = curve.meth();\n        if (((group = EC_GROUP_new(meth)) == NULL) ||\n            (!(group->meth->group_set_curve(group, p, a, b, ctx)))) {\n            ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_EC_LIB);\n            goto err;\n        }\n    } else if (data->field_type == NID_X9_62_prime_field) {\n        if ((group = EC_GROUP_new_curve_GFp(p, a, b, ctx)) == NULL) {\n            ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_EC_LIB);\n            goto err;\n        }\n    }\n#ifndef OPENSSL_NO_EC2M\n    else {\n        if ((group = EC_GROUP_new_curve_GF2m(p, a, b, ctx)) == NULL) {\n            ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_EC_LIB);\n            goto err;\n        }\n    }\n#endif\n    if ((P = EC_POINT_new(group)) == NULL) {\n        ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_EC_LIB);\n        goto err;\n    }\n    if ((x = BN_bin2bn(params + 3 * param_len, param_len, NULL)) == NULL\n        || (y = BN_bin2bn(params + 4 * param_len, param_len, NULL)) == NULL) {\n        ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_BN_LIB);\n        goto err;\n    }\n    if (!EC_POINT_set_affine_coordinates_GFp(group, P, x, y, ctx)) {\n        ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_EC_LIB);\n        goto err;\n    }\n    if ((order = BN_bin2bn(params + 5 * param_len, param_len, NULL)) == NULL\n        || !BN_set_word(x, (BN_ULONG)data->cofactor)) {\n        ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_BN_LIB);\n        goto err;\n    }\n    if (!EC_GROUP_set_generator(group, P, order, x)) {\n        ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_EC_LIB);\n        goto err;\n    }\n    if (seed_len) {\n        if (!EC_GROUP_set_seed(group, params - seed_len, seed_len)) {\n            ECerr(EC_F_EC_GROUP_NEW_FROM_DATA, ERR_R_EC_LIB);\n            goto err;\n        }\n    }\n    ok = 1;\n err:\n    if (!ok) {\n        EC_GROUP_free(group);\n        group = NULL;\n    }\n    EC_POINT_free(P);\n    BN_CTX_free(ctx);\n    BN_free(p);\n    BN_free(a);\n    BN_free(b);\n    BN_free(order);\n    BN_free(x);\n    BN_free(y);\n    return group;\n}', 'BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)\n{\n    unsigned int i, m;\n    unsigned int n;\n    BN_ULONG l;\n    BIGNUM *bn = NULL;\n    if (ret == NULL)\n        ret = bn = BN_new();\n    if (ret == NULL)\n        return (NULL);\n    bn_check_top(ret);\n    for ( ; len > 0 && *s == 0; s++, len--)\n        continue;\n    n = len;\n    if (n == 0) {\n        ret->top = 0;\n        return (ret);\n    }\n    i = ((n - 1) / BN_BYTES) + 1;\n    m = ((n - 1) % (BN_BYTES));\n    if (bn_wexpand(ret, (int)i) == NULL) {\n        BN_free(bn);\n        return NULL;\n    }\n    ret->top = i;\n    ret->neg = 0;\n    l = 0;\n    while (n--) {\n        l = (l << 8L) | *(s++);\n        if (m-- == 0) {\n            ret->d[--i] = l;\n            l = 0;\n            m = BN_BYTES - 1;\n        }\n    }\n    bn_correct_top(ret);\n    return (ret);\n}', "int BN_dec2bn(BIGNUM **bn, const char *a)\n{\n    BIGNUM *ret = NULL;\n    BN_ULONG l = 0;\n    int neg = 0, i, j;\n    int num;\n    if (a == NULL || *a == '\\0')\n        return 0;\n    if (*a == '-') {\n        neg = 1;\n        a++;\n    }\n    for (i = 0; i <= INT_MAX / 4 && ossl_isdigit(a[i]); i++)\n        continue;\n    if (i == 0 || i > INT_MAX / 4)\n        goto err;\n    num = i + neg;\n    if (bn == NULL)\n        return num;\n    if (*bn == NULL) {\n        if ((ret = BN_new()) == NULL)\n            return 0;\n    } else {\n        ret = *bn;\n        BN_zero(ret);\n    }\n    if (bn_expand(ret, i * 4) == NULL)\n        goto err;\n    j = BN_DEC_NUM - i % BN_DEC_NUM;\n    if (j == BN_DEC_NUM)\n        j = 0;\n    l = 0;\n    while (--i >= 0) {\n        l *= 10;\n        l += *a - '0';\n        a++;\n        if (++j == BN_DEC_NUM) {\n            if (!BN_mul_word(ret, BN_DEC_CONV)\n                || !BN_add_word(ret, l))\n                goto err;\n            l = 0;\n            j = 0;\n        }\n    }\n    bn_correct_top(ret);\n    *bn = ret;\n    bn_check_top(ret);\n    if (ret->top != 0)\n        ret->neg = neg;\n    return num;\n err:\n    if (*bn == NULL)\n        BN_free(ret);\n    return 0;\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    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}', 'BIGNUM *bn_expand2(BIGNUM *b, int words)\n{\n    bn_check_top(b);\n    if (words > b->dmax) {\n        BN_ULONG *a = bn_expand_internal(b, words);\n        if (!a)\n            return NULL;\n        if (b->d) {\n            OPENSSL_cleanse(b->d, b->dmax * sizeof(b->d[0]));\n            bn_free_d(b);\n        }\n        b->d = a;\n        b->dmax = words;\n    }\n    bn_check_top(b);\n    return b;\n}', 'static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)\n{\n    BN_ULONG *a = NULL;\n    bn_check_top(b);\n    if (words > (INT_MAX / (4 * BN_BITS2))) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);\n        return NULL;\n    }\n    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);\n        return (NULL);\n    }\n    if (BN_get_flags(b, BN_FLG_SECURE))\n        a = OPENSSL_secure_zalloc(words * sizeof(*a));\n    else\n        a = OPENSSL_zalloc(words * sizeof(*a));\n    if (a == NULL) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);\n        return (NULL);\n    }\n    assert(b->top <= words);\n    if (b->top > 0)\n        memcpy(a, b->d, sizeof(*a) * b->top);\n    return a;\n}', 'void *CRYPTO_zalloc(size_t num, const char *file, int line)\n{\n    void *ret = CRYPTO_malloc(num, file, line);\n    FAILTEST();\n    if (ret != NULL)\n        memset(ret, 0, num);\n    return ret;\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    (void)(file); (void)(line);\n    ret = malloc(num);\n#endif\n    return ret;\n}']