int X509_print_ex()

in crypto/x509/t_x509.c [91:259]

• 158 lines of code
• 53 McCabe index (conditional complexity)

int X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags,
                  unsigned long cflag) {
  char mlch = ' ';
  int nmindent = 0;
  if ((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
    mlch = '\n';
    nmindent = 12;
  }

  if (nmflags == X509_FLAG_COMPAT) {
    nmindent = 16;
  }

  const X509_CINF *ci = x->cert_info;
  if (!(cflag & X509_FLAG_NO_HEADER)) {
    if (BIO_write(bp, "Certificate:\n", 13) <= 0) {
      return 0;
    }
    if (BIO_write(bp, "    Data:\n", 10) <= 0) {
      return 0;
    }
  }
  if (!(cflag & X509_FLAG_NO_VERSION)) {
    long l = X509_get_version(x);
    assert(X509_VERSION_1 <= l && l <= X509_VERSION_3);
    if (BIO_printf(bp, "%8sVersion: %ld (0x%lx)\n", "", l + 1,
                   (unsigned long)l) <= 0) {
      return 0;
    }
  }
  if (!(cflag & X509_FLAG_NO_SERIAL)) {
    if (BIO_write(bp, "        Serial Number:", 22) <= 0) {
      return 0;
    }

    const ASN1_INTEGER *serial = X509_get0_serialNumber(x);
    uint64_t serial_u64;
    if (ASN1_INTEGER_get_uint64(&serial_u64, serial)) {
      assert(serial->type != V_ASN1_NEG_INTEGER);
      if (BIO_printf(bp, " %" PRIu64 " (0x%" PRIx64 ")\n", serial_u64,
                     serial_u64) <= 0) {
        return 0;
      }
    } else {
      ERR_clear_error();  // Clear |ASN1_INTEGER_get_uint64|'s error.
      const char *neg =
          (serial->type == V_ASN1_NEG_INTEGER) ? " (Negative)" : "";
      if (BIO_printf(bp, "\n%12s%s", "", neg) <= 0) {
        return 0;
      }

      for (int i = 0; i < serial->length; i++) {
        if (BIO_printf(bp, "%02x%c", serial->data[i],
                       ((i + 1 == serial->length) ? '\n' : ':')) <= 0) {
          return 0;
        }
      }
    }
  }

  if (!(cflag & X509_FLAG_NO_SIGNAME)) {
    if (X509_signature_print(bp, ci->signature, NULL) <= 0) {
      return 0;
    }
  }

  if (!(cflag & X509_FLAG_NO_ISSUER)) {
    if (BIO_printf(bp, "        Issuer:%c", mlch) <= 0) {
      return 0;
    }
    if (X509_NAME_print_ex(bp, X509_get_issuer_name(x), nmindent, nmflags) <
        0) {
      return 0;
    }
    if (BIO_write(bp, "\n", 1) <= 0) {
      return 0;
    }
  }
  if (!(cflag & X509_FLAG_NO_VALIDITY)) {
    if (BIO_write(bp, "        Validity\n", 17) <= 0) {
      return 0;
    }
    if (BIO_write(bp, "            Not Before: ", 24) <= 0) {
      return 0;
    }
    if (!ASN1_TIME_print(bp, X509_get_notBefore(x))) {
      return 0;
    }
    if (BIO_write(bp, "\n            Not After : ", 25) <= 0) {
      return 0;
    }
    if (!ASN1_TIME_print(bp, X509_get_notAfter(x))) {
      return 0;
    }
    if (BIO_write(bp, "\n", 1) <= 0) {
      return 0;
    }
  }
  if (!(cflag & X509_FLAG_NO_SUBJECT)) {
    if (BIO_printf(bp, "        Subject:%c", mlch) <= 0) {
      return 0;
    }
    if (X509_NAME_print_ex(bp, X509_get_subject_name(x), nmindent, nmflags) <
        0) {
      return 0;
    }
    if (BIO_write(bp, "\n", 1) <= 0) {
      return 0;
    }
  }
  if (!(cflag & X509_FLAG_NO_PUBKEY)) {
    if (BIO_write(bp, "        Subject Public Key Info:\n", 33) <= 0) {
      return 0;
    }
    if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0) {
      return 0;
    }
    if (i2a_ASN1_OBJECT(bp, ci->key->algor->algorithm) <= 0) {
      return 0;
    }
    if (BIO_puts(bp, "\n") <= 0) {
      return 0;
    }

    const EVP_PKEY *pkey = X509_get0_pubkey(x);
    if (pkey == NULL) {
      BIO_printf(bp, "%12sUnable to load Public Key\n", "");
      ERR_print_errors(bp);
    } else {
      EVP_PKEY_print_public(bp, pkey, 16, NULL);
    }
  }

  if (!(cflag & X509_FLAG_NO_IDS)) {
    if (ci->issuerUID) {
      if (BIO_printf(bp, "%8sIssuer Unique ID: ", "") <= 0) {
        return 0;
      }
      if (!X509_signature_dump(bp, ci->issuerUID, 12)) {
        return 0;
      }
    }
    if (ci->subjectUID) {
      if (BIO_printf(bp, "%8sSubject Unique ID: ", "") <= 0) {
        return 0;
      }
      if (!X509_signature_dump(bp, ci->subjectUID, 12)) {
        return 0;
      }
    }
  }

  if (!(cflag & X509_FLAG_NO_EXTENSIONS)) {
    X509V3_extensions_print(bp, "X509v3 extensions", ci->extensions, cflag, 8);
  }

  if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
    if (X509_signature_print(bp, x->sig_alg, x->signature) <= 0) {
      return 0;
    }
  }
  if (!(cflag & X509_FLAG_NO_AUX)) {
    if (!X509_CERT_AUX_print(bp, x->aux, 0)) {
      return 0;
    }
  }

  return 1;
}