Esempio n. 1
0
X509 *X509_parse_from_buffer(CRYPTO_BUFFER *buf) {
  if (CRYPTO_BUFFER_len(buf) > LONG_MAX) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW);
    return 0;
  }

  X509 *x509 = X509_new();
  if (x509 == NULL) {
    return NULL;
  }

  x509->cert_info->enc.alias_only_on_next_parse = 1;

  const uint8_t *inp = CRYPTO_BUFFER_data(buf);
  X509 *x509p = x509;
  X509 *ret = d2i_X509(&x509p, &inp, CRYPTO_BUFFER_len(buf));
  if (ret == NULL ||
      inp - CRYPTO_BUFFER_data(buf) != (ptrdiff_t)CRYPTO_BUFFER_len(buf)) {
    X509_free(x509p);
    return NULL;
  }
  assert(x509p == x509);
  assert(ret == x509);

  CRYPTO_BUFFER_up_ref(buf);
  ret->buf = buf;

  return ret;
}
Esempio n. 2
0
int ssl_add_client_CA_list(SSL *ssl, CBB *cbb) {
  CBB child, name_cbb;
  if (!CBB_add_u16_length_prefixed(cbb, &child)) {
    return 0;
  }

  STACK_OF(CRYPTO_BUFFER) *names = ssl->client_CA;
  if (names == NULL) {
    names = ssl->ctx->client_CA;
  }
  if (names == NULL) {
    return CBB_flush(cbb);
  }

  for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(names); i++) {
    const CRYPTO_BUFFER *name = sk_CRYPTO_BUFFER_value(names, i);

    if (!CBB_add_u16_length_prefixed(&child, &name_cbb) ||
        !CBB_add_bytes(&name_cbb, CRYPTO_BUFFER_data(name),
                       CRYPTO_BUFFER_len(name))) {
      return 0;
    }
  }

  return CBB_flush(cbb);
}
Esempio n. 3
0
int ssl_add_cert_chain(SSL *ssl, CBB *cbb) {
  if (!ssl_has_certificate(ssl)) {
    return CBB_add_u24(cbb, 0);
  }

  CBB certs;
  if (!CBB_add_u24_length_prefixed(cbb, &certs)) {
    goto err;
  }

  STACK_OF(CRYPTO_BUFFER) *chain = ssl->cert->chain;
  for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(chain); i++) {
    CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(chain, i);
    CBB child;
    if (!CBB_add_u24_length_prefixed(&certs, &child) ||
        !CBB_add_bytes(&child, CRYPTO_BUFFER_data(buffer),
                       CRYPTO_BUFFER_len(buffer)) ||
        !CBB_flush(&certs)) {
      goto err;
    }
  }

  return CBB_flush(cbb);

err:
  OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
  return 0;
}
Esempio n. 4
0
int ssl_check_leaf_certificate(SSL_HANDSHAKE *hs, EVP_PKEY *pkey,
                               const CRYPTO_BUFFER *leaf) {
  SSL *const ssl = hs->ssl;
  assert(ssl3_protocol_version(ssl) < TLS1_3_VERSION);

  /* Check the certificate's type matches the cipher. */
  if (!(hs->new_cipher->algorithm_auth & ssl_cipher_auth_mask_for_key(pkey))) {
    OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CERTIFICATE_TYPE);
    return 0;
  }

  /* Check key usages for all key types but RSA. This is needed to distinguish
   * ECDH certificates, which we do not support, from ECDSA certificates. In
   * principle, we should check RSA key usages based on cipher, but this breaks
   * buggy antivirus deployments. Other key types are always used for signing.
   *
   * TODO(davidben): Get more recent data on RSA key usages. */
  if (EVP_PKEY_id(pkey) != EVP_PKEY_RSA) {
    CBS leaf_cbs;
    CBS_init(&leaf_cbs, CRYPTO_BUFFER_data(leaf), CRYPTO_BUFFER_len(leaf));
    if (!ssl_cert_check_digital_signature_key_usage(&leaf_cbs)) {
      return 0;
    }
  }

  if (EVP_PKEY_id(pkey) == EVP_PKEY_EC) {
    /* Check the key's group and point format are acceptable. */
    EC_KEY *ec_key = EVP_PKEY_get0_EC_KEY(pkey);
    uint16_t group_id;
    if (!ssl_nid_to_group_id(
            &group_id, EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key))) ||
        !tls1_check_group_id(ssl, group_id) ||
        EC_KEY_get_conv_form(ec_key) != POINT_CONVERSION_UNCOMPRESSED) {
      OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_ECC_CERT);
      return 0;
    }
  }

  return 1;
}
Esempio n. 5
0
int tls13_prepare_certificate(SSL_HANDSHAKE *hs) {
  SSL *const ssl = hs->ssl;
  CBB cbb, body, certificate_list;
  if (!ssl->method->init_message(ssl, &cbb, &body, SSL3_MT_CERTIFICATE) ||
      /* The request context is always empty in the handshake. */
      !CBB_add_u8(&body, 0) ||
      !CBB_add_u24_length_prefixed(&body, &certificate_list)) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
    goto err;
  }

  if (!ssl_has_certificate(ssl)) {
    if (!ssl_complete_message(ssl, &cbb)) {
      goto err;
    }

    return 1;
  }

  CERT *cert = ssl->cert;
  CBB leaf, extensions;
  if (!CBB_add_u24_length_prefixed(&certificate_list, &leaf) ||
      !ssl_add_cert_to_cbb(&leaf, cert->x509_leaf) ||
      !CBB_add_u16_length_prefixed(&certificate_list, &extensions)) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
    goto err;
  }

  if (hs->scts_requested &&
      ssl->ctx->signed_cert_timestamp_list_length != 0) {
    CBB contents;
    if (!CBB_add_u16(&extensions, TLSEXT_TYPE_certificate_timestamp) ||
        !CBB_add_u16_length_prefixed(&extensions, &contents) ||
        !CBB_add_bytes(&contents, ssl->ctx->signed_cert_timestamp_list,
                       ssl->ctx->signed_cert_timestamp_list_length) ||
        !CBB_flush(&extensions)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
      goto err;
    }
  }

  if (hs->ocsp_stapling_requested &&
      ssl->ocsp_response != NULL) {
    CBB contents, ocsp_response;
    if (!CBB_add_u16(&extensions, TLSEXT_TYPE_status_request) ||
        !CBB_add_u16_length_prefixed(&extensions, &contents) ||
        !CBB_add_u8(&contents, TLSEXT_STATUSTYPE_ocsp) ||
        !CBB_add_u24_length_prefixed(&contents, &ocsp_response) ||
        !CBB_add_bytes(&ocsp_response, CRYPTO_BUFFER_data(ssl->ocsp_response),
                       CRYPTO_BUFFER_len(ssl->ocsp_response)) ||
        !CBB_flush(&extensions)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
      goto err;
    }
  }

  for (size_t i = 0; i < sk_X509_num(cert->x509_chain); i++) {
    CBB child;
    if (!CBB_add_u24_length_prefixed(&certificate_list, &child) ||
        !ssl_add_cert_to_cbb(&child, sk_X509_value(cert->x509_chain, i)) ||
        !CBB_add_u16(&certificate_list, 0 /* no extensions */)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
      goto err;
    }
  }

  if (!ssl_complete_message(ssl, &cbb)) {
    goto err;
  }

  return 1;

err:
  CBB_cleanup(&cbb);
  return 0;
}
Esempio n. 6
0
static int SSL_SESSION_to_bytes_full(const SSL_SESSION *in, uint8_t **out_data,
                                     size_t *out_len, int for_ticket) {
  CBB cbb, session, child, child2;

  if (in == NULL || in->cipher == NULL) {
    return 0;
  }

  CBB_zero(&cbb);
  if (!CBB_init(&cbb, 0) ||
      !CBB_add_asn1(&cbb, &session, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1_uint64(&session, kVersion) ||
      !CBB_add_asn1_uint64(&session, in->ssl_version) ||
      !CBB_add_asn1(&session, &child, CBS_ASN1_OCTETSTRING) ||
      !CBB_add_u16(&child, (uint16_t)(in->cipher->id & 0xffff)) ||
      !CBB_add_asn1(&session, &child, CBS_ASN1_OCTETSTRING) ||
      /* The session ID is irrelevant for a session ticket. */
      !CBB_add_bytes(&child, in->session_id,
                     for_ticket ? 0 : in->session_id_length) ||
      !CBB_add_asn1(&session, &child, CBS_ASN1_OCTETSTRING) ||
      !CBB_add_bytes(&child, in->master_key, in->master_key_length) ||
      !CBB_add_asn1(&session, &child, kTimeTag) ||
      !CBB_add_asn1_uint64(&child, in->time) ||
      !CBB_add_asn1(&session, &child, kTimeoutTag) ||
      !CBB_add_asn1_uint64(&child, in->timeout)) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
    goto err;
  }

  /* The peer certificate is only serialized if the SHA-256 isn't
   * serialized instead. */
  if (sk_CRYPTO_BUFFER_num(in->certs) > 0 && !in->peer_sha256_valid) {
    const CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(in->certs, 0);
    if (!CBB_add_asn1(&session, &child, kPeerTag) ||
        !CBB_add_bytes(&child, CRYPTO_BUFFER_data(buffer),
                       CRYPTO_BUFFER_len(buffer))) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  /* Although it is OPTIONAL and usually empty, OpenSSL has
   * historically always encoded the sid_ctx. */
  if (!CBB_add_asn1(&session, &child, kSessionIDContextTag) ||
      !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
      !CBB_add_bytes(&child2, in->sid_ctx, in->sid_ctx_length)) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
    goto err;
  }

  if (in->verify_result != X509_V_OK) {
    if (!CBB_add_asn1(&session, &child, kVerifyResultTag) ||
        !CBB_add_asn1_uint64(&child, in->verify_result)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->tlsext_hostname) {
    if (!CBB_add_asn1(&session, &child, kHostNameTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, (const uint8_t *)in->tlsext_hostname,
                       strlen(in->tlsext_hostname))) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->psk_identity) {
    if (!CBB_add_asn1(&session, &child, kPSKIdentityTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, (const uint8_t *)in->psk_identity,
                       strlen(in->psk_identity))) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->tlsext_tick_lifetime_hint > 0) {
    if (!CBB_add_asn1(&session, &child, kTicketLifetimeHintTag) ||
        !CBB_add_asn1_uint64(&child, in->tlsext_tick_lifetime_hint)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->tlsext_tick && !for_ticket) {
    if (!CBB_add_asn1(&session, &child, kTicketTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, in->tlsext_tick, in->tlsext_ticklen)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->peer_sha256_valid) {
    if (!CBB_add_asn1(&session, &child, kPeerSHA256Tag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, in->peer_sha256, sizeof(in->peer_sha256))) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->original_handshake_hash_len > 0) {
    if (!CBB_add_asn1(&session, &child, kOriginalHandshakeHashTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, in->original_handshake_hash,
                       in->original_handshake_hash_len)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->tlsext_signed_cert_timestamp_list_length > 0) {
    if (!CBB_add_asn1(&session, &child, kSignedCertTimestampListTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, in->tlsext_signed_cert_timestamp_list,
                       in->tlsext_signed_cert_timestamp_list_length)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->ocsp_response_length > 0) {
    if (!CBB_add_asn1(&session, &child, kOCSPResponseTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, in->ocsp_response, in->ocsp_response_length)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->extended_master_secret) {
    if (!CBB_add_asn1(&session, &child, kExtendedMasterSecretTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_BOOLEAN) ||
        !CBB_add_u8(&child2, 0xff)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->group_id > 0 &&
      (!CBB_add_asn1(&session, &child, kGroupIDTag) ||
       !CBB_add_asn1_uint64(&child, in->group_id))) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
    goto err;
  }

  /* The certificate chain is only serialized if the leaf's SHA-256 isn't
   * serialized instead. */
  if (in->certs != NULL &&
      !in->peer_sha256_valid &&
      sk_CRYPTO_BUFFER_num(in->certs) >= 2) {
    if (!CBB_add_asn1(&session, &child, kCertChainTag)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
    for (size_t i = 1; i < sk_CRYPTO_BUFFER_num(in->certs); i++) {
      const CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(in->certs, i);
      if (!CBB_add_bytes(&child, CRYPTO_BUFFER_data(buffer),
                         CRYPTO_BUFFER_len(buffer))) {
        OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
        goto err;
      }
    }
  }

  if (in->ticket_age_add_valid) {
    if (!CBB_add_asn1(&session, &child, kTicketAgeAddTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_u32(&child2, in->ticket_age_add)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (!in->is_server) {
    if (!CBB_add_asn1(&session, &child, kIsServerTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_BOOLEAN) ||
        !CBB_add_u8(&child2, 0x00)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (in->peer_signature_algorithm != 0 &&
      (!CBB_add_asn1(&session, &child, kPeerSignatureAlgorithmTag) ||
       !CBB_add_asn1_uint64(&child, in->peer_signature_algorithm))) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
    goto err;
  }

  if (in->ticket_max_early_data != 0 &&
      (!CBB_add_asn1(&session, &child, kTicketMaxEarlyDataTag) ||
       !CBB_add_asn1_uint64(&child, in->ticket_max_early_data))) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
    goto err;
  }

  if (in->timeout != in->auth_timeout &&
      (!CBB_add_asn1(&session, &child, kAuthTimeoutTag) ||
       !CBB_add_asn1_uint64(&child, in->auth_timeout))) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
    goto err;
  }

  if (in->early_alpn) {
    if (!CBB_add_asn1(&session, &child, kEarlyALPNTag) ||
        !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
        !CBB_add_bytes(&child2, (const uint8_t *)in->early_alpn,
                       in->early_alpn_len)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
      goto err;
    }
  }

  if (!CBB_finish(&cbb, out_data, out_len)) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
    goto err;
  }
  return 1;

 err:
  CBB_cleanup(&cbb);
  return 0;
}