ssl/tls_srp.c:346: error: BUFFER_OVERRUN_L3
  Offset added: [1, 15] Size: [0, +oo] by call to `ssl_randbytes`.
Showing all 10 steps of the trace


ssl/tls_srp.c:346:9: Call
344.       unsigned char rnd[SSL_MAX_MASTER_KEY_LENGTH];
345.   
346.       if (ssl_randbytes(s, rnd, sizeof(rnd)) <= 0)
               ^
347.           return 0;
348.       s->srp_ctx.a = BN_bin2bn(rnd, sizeof(rnd), s->srp_ctx.a);

ssl/ssl_lib.c:5128:1: Parameter `size`
  5126.   }
  5127.   
  5128. > int ssl_randbytes(SSL *s, unsigned char *rnd, size_t size)
  5129.   {
  5130.       if (s->drbg != NULL)

ssl/ssl_lib.c:5131:16: Call
  5129.   {
  5130.       if (s->drbg != NULL)
  5131.           return RAND_DRBG_generate(s->drbg, rnd, size, 0, NULL, 0);
                         ^
  5132.       return RAND_bytes(rnd, (int)size);
  5133.   }

crypto/rand/drbg_lib.c:355:1: Parameter `outlen`
    353.    *
    354.    */
    355. > int RAND_DRBG_generate(RAND_DRBG *drbg, unsigned char *out, size_t outlen,
    356.                          int prediction_resistance,
    357.                          const unsigned char *adin, size_t adinlen)

crypto/rand/drbg_lib.c:401:10: Call
    399.       }
    400.   
    401.       if (!ctr_generate(drbg, out, outlen, adin, adinlen)) {
                    ^
    402.           drbg->state = DRBG_ERROR;
    403.           RANDerr(RAND_F_RAND_DRBG_GENERATE, RAND_R_GENERATE_ERROR);

crypto/rand/drbg_rand.c:266:1: <Offset trace>
264.   }
265.   
266. > int ctr_generate(RAND_DRBG *drbg,
267.                    unsigned char *out, size_t outlen,
268.                    const unsigned char *adin, size_t adinlen)

crypto/rand/drbg_rand.c:266:1: Parameter `outlen`
      264.   }
      265.   
      266. > int ctr_generate(RAND_DRBG *drbg,
      267.                    unsigned char *out, size_t outlen,
      268.                    const unsigned char *adin, size_t adinlen)

crypto/rand/drbg_rand.c:266:1: <Length trace>
264.   }
265.   
266. > int ctr_generate(RAND_DRBG *drbg,
267.                    unsigned char *out, size_t outlen,
268.                    const unsigned char *adin, size_t adinlen)

crypto/rand/drbg_rand.c:266:1: Parameter `drbg->ctr.K[*]`
      264.   }
      265.   
      266. > int ctr_generate(RAND_DRBG *drbg,
      267.                    unsigned char *out, size_t outlen,
      268.                    const unsigned char *adin, size_t adinlen)

crypto/rand/drbg_rand.c:288:13: Array access: Offset added: [1, 15] Size: [0, +oo] by call to `ssl_randbytes` 
      286.               /* Use K as temp space as it will be updated */
      287.               AES_encrypt(ctr->V, ctr->K, &ctr->ks);
      288.               memcpy(out, ctr->K, outlen);
                         ^
      289.               break;
      290.           }

int ctr_generate(RAND_DRBG *drbg,
                 unsigned char *out, size_t outlen,
                 const unsigned char *adin, size_t adinlen)
{
    RAND_DRBG_CTR *ctr = &drbg->ctr;
    if (adin != NULL && adinlen != 0) {
        ctr_update(drbg, adin, adinlen, NULL, 0, NULL, 0);
        if (drbg->flags & RAND_DRBG_FLAG_CTR_USE_DF) {
            adin = NULL;
            adinlen = 1;
        }
    } else {
        adinlen = 0;
    }
    for ( ; ; ) {
        inc_128(ctr);
        if (outlen < 16) {
            AES_encrypt(ctr->V, ctr->K, &ctr->ks);
            memcpy(out, ctr->K, outlen);
            break;
        }
        AES_encrypt(ctr->V, out, &ctr->ks);
        out += 16;
        outlen -= 16;
        if (outlen == 0)
            break;
    }
    ctr_update(drbg, adin, adinlen, NULL, 0, NULL, 0);
    return 1;
}
['int SRP_Calc_A_param(SSL *s)\n{\n    unsigned char rnd[SSL_MAX_MASTER_KEY_LENGTH];\n    if (ssl_randbytes(s, rnd, sizeof(rnd)) <= 0)\n        return 0;\n    s->srp_ctx.a = BN_bin2bn(rnd, sizeof(rnd), s->srp_ctx.a);\n    OPENSSL_cleanse(rnd, sizeof(rnd));\n    if (!(s->srp_ctx.A = SRP_Calc_A(s->srp_ctx.a, s->srp_ctx.N, s->srp_ctx.g)))\n        return 0;\n    return 1;\n}', 'int ssl_randbytes(SSL *s, unsigned char *rnd, size_t size)\n{\n    if (s->drbg != NULL)\n        return RAND_DRBG_generate(s->drbg, rnd, size, 0, NULL, 0);\n    return RAND_bytes(rnd, (int)size);\n}', 'int RAND_DRBG_generate(RAND_DRBG *drbg, unsigned char *out, size_t outlen,\n                       int prediction_resistance,\n                       const unsigned char *adin, size_t adinlen)\n{\n    int reseed_required = 0;\n    if (drbg->state != DRBG_READY) {\n        rand_drbg_restart(drbg, NULL, 0, 0);\n        if (drbg->state == DRBG_ERROR) {\n            RANDerr(RAND_F_RAND_DRBG_GENERATE, RAND_R_IN_ERROR_STATE);\n            return 0;\n        }\n        if (drbg->state == DRBG_UNINITIALISED) {\n            RANDerr(RAND_F_RAND_DRBG_GENERATE, RAND_R_NOT_INSTANTIATED);\n            return 0;\n        }\n    }\n    if (outlen > drbg->max_request) {\n        RANDerr(RAND_F_RAND_DRBG_GENERATE, RAND_R_REQUEST_TOO_LARGE_FOR_DRBG);\n        return 0;\n    }\n    if (adinlen > drbg->max_adinlen) {\n        RANDerr(RAND_F_RAND_DRBG_GENERATE, RAND_R_ADDITIONAL_INPUT_TOO_LONG);\n        return 0;\n    }\n    if (drbg->fork_count != rand_fork_count) {\n        drbg->fork_count = rand_fork_count;\n        reseed_required = 1;\n    }\n    if (drbg->reseed_counter >= drbg->reseed_interval)\n        reseed_required = 1;\n    if (reseed_required || prediction_resistance) {\n        if (!RAND_DRBG_reseed(drbg, adin, adinlen)) {\n            RANDerr(RAND_F_RAND_DRBG_GENERATE, RAND_R_RESEED_ERROR);\n            return 0;\n        }\n        adin = NULL;\n        adinlen = 0;\n    }\n    if (!ctr_generate(drbg, out, outlen, adin, adinlen)) {\n        drbg->state = DRBG_ERROR;\n        RANDerr(RAND_F_RAND_DRBG_GENERATE, RAND_R_GENERATE_ERROR);\n        return 0;\n    }\n    drbg->reseed_counter++;\n    return 1;\n}', 'int ctr_generate(RAND_DRBG *drbg,\n                 unsigned char *out, size_t outlen,\n                 const unsigned char *adin, size_t adinlen)\n{\n    RAND_DRBG_CTR *ctr = &drbg->ctr;\n    if (adin != NULL && adinlen != 0) {\n        ctr_update(drbg, adin, adinlen, NULL, 0, NULL, 0);\n        if (drbg->flags & RAND_DRBG_FLAG_CTR_USE_DF) {\n            adin = NULL;\n            adinlen = 1;\n        }\n    } else {\n        adinlen = 0;\n    }\n    for ( ; ; ) {\n        inc_128(ctr);\n        if (outlen < 16) {\n            AES_encrypt(ctr->V, ctr->K, &ctr->ks);\n            memcpy(out, ctr->K, outlen);\n            break;\n        }\n        AES_encrypt(ctr->V, out, &ctr->ks);\n        out += 16;\n        outlen -= 16;\n        if (outlen == 0)\n            break;\n    }\n    ctr_update(drbg, adin, adinlen, NULL, 0, NULL, 0);\n    return 1;\n}']