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1855 | -- --
-- package Copyright (c) Dmitry A. Kazakov --
-- GNAT.Sockets.Server.OpenSSL Luebeck --
-- Implementation Winter, 2019 --
-- --
-- Last revision : 09:42 12 Dec 2020 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, or (at your option) any later version. This library --
-- is distributed in the hope that it will be useful, but WITHOUT --
-- ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have --
-- received a copy of the GNU General Public License along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from --
-- this unit, or you link this unit with other files to produce an --
-- executable, this unit does not by itself cause the resulting --
-- executable to be covered by the GNU General Public License. This --
-- exception does not however invalidate any other reasons why the --
-- executable file might be covered by the GNU Public License. --
--____________________________________________________________________--
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
with Interfaces.C.Strings; use Interfaces.C.Strings;
with Synchronization.Mutexes; use Synchronization.Mutexes;
with Ada.Unchecked_Deallocation;
with System.Address_To_Access_Conversions;
package body GNAT.Sockets.Server.OpenSSL is
procedure Free is
new Ada.Unchecked_Deallocation (Encoder'Class, Encoder_Ptr);
package Conversions is
new System.Address_To_Access_Conversions (OpenSSL_Session);
function "+" (Ptr : chars_ptr) return String is
begin
if Ptr = Null_Ptr then
return "";
else
return Value (Ptr);
end if;
end "+";
Lock : aliased Mutex;
Init : Boolean := False;
Read_Method : BIO_METHOD := No_METHOD;
Write_Method : BIO_METHOD := No_METHOD;
function BIO_Control
( b : BIO;
cmd : BIO_CTRL;
num : long;
ptr : System.Address
) return long is
begin
case cmd is
when BIO_CTRL_FLUSH | BIO_CTRL_PUSH | BIO_CTRL_POP =>
return 1;
when others =>
return 0;
end case;
end BIO_Control;
function BIO_Gets
( b : BIO;
data : Stream_Element_Pointers.Pointer;
dlen : int
) return int is
use Stream_Element_Pointers;
Written : int := 0;
Count : aliased size_t;
Ptr : Pointer := data;
begin
while Written < dlen loop
if BIO_read (b, Ptr.all'Address, 1, Count'Access) <= 0 then
return -1;
end if;
Written := Written + 1;
exit when Ptr.all = 0;
Increment (Ptr);
end loop;
return Written;
end BIO_Gets;
function BIO_Puts
( b : BIO;
data : Stream_Element_Pointers.Pointer
) return int is
use Stream_Element_Pointers;
Length : constant size_t := size_t (Virtual_Length (data));
Count : aliased size_t;
begin
if 0 < BIO_Write
( b,
data.all'Address,
size_t (Length),
Count'Access
) then
return int (Count);
else
return -1;
end if;
end BIO_Puts;
function BIO_Read
( b : BIO;
data : System.Address;
dlen : size_t;
readbytes : access size_t
) return int is
use Conversions;
subtype Buffer_Type is
Stream_Element_Array (1..Stream_Element_Count (dlen));
Session : Object_Pointer := To_Pointer (BIO_get_data (b));
Pointer : Stream_Element_Offset := 1;
Buffer : Buffer_Type;
for Buffer'Address use data;
begin
BIO_clear_flags (b, BIO_FLAGS_RWS + BIO_FLAGS_SHOULD_RETRY);
if Session = null then
readbytes.all := 0;
else
Pull (Session.Client.Read, Buffer, Pointer);
readbytes.all := size_t (Pointer - 1);
end if;
if dlen > readbytes.all then
BIO_set_flags (b, BIO_FLAGS_READ + BIO_FLAGS_SHOULD_RETRY);
end if;
return 1;
end BIO_Read;
function BIO_Read
( b : BIO;
data : System.Address;
dlen : int
) return int is
Count : aliased size_t;
begin
if BIO_Read (b, data, size_t (dlen), Count'Access) > 0 then
return int (Count);
else
return -1;
end if;
end BIO_Read;
function BIO_Write
( b : BIO;
data : System.Address;
dlen : size_t;
written : access size_t
) return int is
subtype Buffer_Type is
Stream_Element_Array (1..Stream_Element_Count (dlen));
Session : OpenSSL_Session renames
Conversions.To_Pointer (BIO_get_data (b)).all;
Client : Connection'Class renames Session.Client.all;
Last : Stream_Element_Offset;
Buffer : Buffer_Type;
for Buffer'Address use data;
begin
BIO_clear_flags (b, BIO_FLAGS_RWS + BIO_FLAGS_SHOULD_RETRY);
Send_Socket (Get_Socket (Client), Buffer, Last);
if Last > 0 then
if Is_Trace_Received_On
( Client.Socket_Listener.Factory.all,
Trace_Encoded
) then
Trace_Sent
( Factory => Client.Socket_Listener.Factory.all,
Client => Client,
Data => Buffer,
From => Buffer'First,
To => Last,
Encoded => True
);
end if;
Client.Data_Sent := True;
end if;
written.all := size_t (Last);
if dlen > written.all then
BIO_set_flags (b, BIO_FLAGS_WRITE + BIO_FLAGS_SHOULD_RETRY);
end if;
return 1;
exception
when Error : Socket_Error =>
Receive_Error (Client, Error);
written.all := size_t (Last);
return 0;
when Error : others =>
Trace_Error
( Client.Socket_Listener.Factory.all,
"TLS transport writing",
Error
);
written.all := size_t (Last);
return 0;
end BIO_Write;
function BIO_Write
( b : BIO;
data : System.Address;
dlen : int
) return int is
Count : aliased size_t;
begin
if BIO_Write (b, data, size_t (dlen), Count'Access) > 0 then
return int (Count);
else
return -1;
end if;
end BIO_Write;
procedure Check_Private_Key (Session : SSL) is
begin
if SSL_check_private_key (Session) <= 0 then
Check_Error (Use_Error'Identity);
end if;
end Check_Private_Key;
procedure Check_Private_Key
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if SSL_CTX_check_private_key (Factory.Client_Context) <= 0 then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if SSL_CTX_check_private_key (Factory.Server_Context) <= 0 then
Check_Error (Use_Error'Identity);
end if;
end if;
end Check_Private_Key;
procedure Clear_Options (Session : SSL; Options : SSL_OP) is
Result : SSL_OP;
begin
Result := SSL_clear_options (Session, Options);
end Clear_Options;
procedure Clear_Options
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
Options : SSL_OP
) is
Result : SSL_OP;
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
Result :=
SSL_CTX_clear_options (Factory.Client_Context, Options);
end if;
if Context in Any_Context..Server_Context then
Result :=
SSL_CTX_clear_options (Factory.Server_Context, Options);
end if;
end Clear_Options;
procedure Create_Context
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type
) is
Result : int;
begin
declare
Exclusive : Holder (Lock'Access);
begin
if not Init then
if OPENSSL_init_ssl (OPENSSL_INIT_SSL_DEFAULT) <= 0 then
Check_Error (Status_Error'Identity);
end if;
Read_Method :=
BIO_meth_new (BIO_get_new_index, "GNAT sockets read");
Result := BIO_meth_set_gets (Read_Method, BIO_Gets'Access);
Result :=
BIO_meth_set_read_ex (Read_Method, BIO_Read'Access);
Result :=
BIO_meth_set_ctrl (Read_Method, BIO_Control'Access);
Write_Method :=
BIO_meth_new (BIO_get_new_index, "GNAT sockets write");
Result := BIO_meth_set_puts (Write_Method, BIO_Puts'Access);
Result :=
BIO_meth_set_write_ex (Write_Method, BIO_Write'Access);
Result :=
BIO_meth_set_ctrl (Write_Method, BIO_Control'Access);
Init := True;
end if;
end;
if Context in Client_Context..Any_Context then
if Factory.Client_Context = No_SSL_CTX then
Factory.Client_Context := SSL_CTX_new (TLS_client_method);
if Factory.Client_Context = No_SSL_CTX then
Check_Error (Data_Error'Identity);
end if;
Result := SSL_CTX_up_ref (Factory.Client_Context);
end if;
end if;
if Context in Any_Context..Server_Context then
Factory.Server_Context := SSL_CTX_new (TLS_server_method);
if Factory.Server_Context = No_SSL_CTX then
Check_Error (Data_Error'Identity);
end if;
Result := SSL_CTX_up_ref (Factory.Server_Context);
end if;
end Create_Context;
function Create_Transport
( Factory : access Abstract_OpenSSL_Factory;
Listener : access Connections_Server'Class;
Client : access Connection'Class
) return Encoder_Ptr is
Result : Encoder_Ptr;
begin
if Client.Client then
Create_Context (Factory.all, Client_Context);
Result := new OpenSSL_Session
( Client.all'Unchecked_Access,
Factory.Decoded_Size
);
else
Create_Context (Factory.all, Server_Context);
Result := new OpenSSL_Session
( Client.all'Unchecked_Access,
Factory.Decoded_Size
);
end if;
declare
Session : OpenSSL_Session renames OpenSSL_Session (Result.all);
Self : Abstract_OpenSSL_Factory'Class renames
Abstract_OpenSSL_Factory'Class (Factory.all);
begin
if Client.Client then
Session.SSL_Session := SSL_new (Factory.Client_Context);
SSL_set_connect_state (Session.SSL_Session);
if Session.SSL_Session = No_SSL then
Check_Error (Data_Error'Identity);
end if;
Factory.Client_Context := No_SSL_CTX;
else
Session.SSL_Session := SSL_new (Factory.Server_Context);
SSL_set_accept_state (Session.SSL_Session);
if Session.SSL_Session = No_SSL then
Check_Error (Data_Error'Identity);
end if;
Factory.Server_Context := No_SSL_CTX;
end if;
Session.Input := BIO_new (Read_Method);
BIO_set_data (Session.Input, Session'Address);
SSL_set0_rbio (Session.SSL_Session, Session.Input);
Session.Output := BIO_new (Write_Method);
BIO_set_data (Session.Output, Session'Address);
SSL_set0_wbio (Session.SSL_Session, Session.Output);
if Factory.Trace_Session then
Trace (Self, "OpenSSL setting up session");
end if;
Prepare (Self, Client.all, Session.SSL_Session);
if Factory.Trace_Session then
Trace (Self, "OpenSSL handshake engaged");
end if;
end;
return Result;
exception
when Error : others =>
Free (Result);
Trace_Error
( Factory.all,
"OpenSSL transport creation fault",
Error
);
return null;
end Create_Transport;
procedure Decrypt
( Transport : in out OpenSSL_Session;
Client : in out Connection'Class;
Got_It : out Boolean
) is
Factory : Connections_Factory'Class renames
Client.Socket_Listener.Factory.all;
Result : int;
Count : aliased size_t := 0;
Buffer : Input_Buffer renames Transport.Buffer;
Last : Stream_Element_Offset;
begin
-- if not Has_Data (Client) then
-- ada.Text_IO.Put_Line(" no data read");
-- Got_It := False;
-- return;
-- end if;
if Buffer.Free_To_Read < Buffer.First_Read then
--
-- [XXXXXXXXXXXXXX XXXXX]
-- Free_To_Read | First_Read |
--
Last := Buffer.First_Read - 2;
if Last <= Buffer.First_Read then -- Read buffer is full
Got_It := True;
return;
end if;
else
--
-- [ XXXXXXXXX ]
-- First_Read | | Free_To_Read
--
if ( Buffer.Free_To_Read - Buffer.First_Read
>= Buffer.Read'Length
)
then -- Read buffer is full
Got_It := True;
return;
elsif Buffer.Free_To_Read > Buffer.Read'Last then -- Wrap
Buffer.Free_To_Read := Buffer.Read'First;
Last := Buffer.First_Read - 2;
else
Last := Buffer.Read'Last;
end if;
end if;
Result :=
SSL_read_ex
( Transport.SSL_Session,
Buffer.Read (Buffer.Free_To_Read)'Access,
int (Last - Buffer.Free_To_Read + 1),
Count'Access
);
if Result <= 0 then
case SSL_get_error (Transport.SSL_Session, Result) is
when SSL_ERROR_NONE |
SSL_ERROR_WANT_ACCEPT |
SSL_ERROR_WANT_CLIENT_HELLO_CB |
SSL_ERROR_WANT_CONNECT |
SSL_ERROR_WANT_READ |
SSL_ERROR_WANT_WRITE |
SSL_ERROR_WANT_X509_LOOKUP =>
Last := ( Buffer.Free_To_Read
+ Stream_Element_Offset (Count)
- 1
);
when SSL_ERROR_ZERO_RETURN =>
Last := Buffer.Free_To_Read - 1;
when others =>
Last := Buffer.Free_To_Read - 1;
Check_Error (Data_Error'Identity);
end case;
else
Last :=
Buffer.Free_To_Read + Stream_Element_Offset (Count) - 1;
end if;
if Last + 1 /= Buffer.Free_To_Read then -- Some data read
Got_It := True;
if Is_Trace_Received_On (Factory, Trace_Decoded) then
Trace_Received
( Factory => Factory,
Client => Client,
Data => Buffer.Read,
From => Buffer.Free_To_Read,
To => Last,
Encoded => False
);
end if;
Buffer.Expected :=
Stream_Element_Offset'Max
( Buffer.Expected - (Last - Buffer.Free_To_Read + 1),
0
);
Buffer.Free_To_Read := Last + 1;
else
Got_It := False;
end if;
exception
when End_Error =>
raise Connection_Error;
end Decrypt;
procedure Encode
( Transport : in out OpenSSL_Session;
Client : in out Connection'Class;
Data : Stream_Element_Array;
Last : out Stream_Element_Offset
) is
Result : int;
Count : aliased size_t := 0;
begin
Result :=
SSL_write_ex
( Transport.SSL_Session,
Data (Data'First)'Address,
Data'Length,
Count'Access
);
if Result <= 0 then
case SSL_get_error (Transport.SSL_Session, Result) is
when SSL_ERROR_NONE |
SSL_ERROR_WANT_ACCEPT |
SSL_ERROR_WANT_CLIENT_HELLO_CB |
SSL_ERROR_WANT_CONNECT |
SSL_ERROR_WANT_READ |
SSL_ERROR_WANT_WRITE |
SSL_ERROR_WANT_X509_LOOKUP =>
Last := Data'First + Stream_Element_Offset (Count) - 1;
when SSL_ERROR_ZERO_RETURN =>
Last := Data'First - 1;
when others =>
Check_Error (Data_Error'Identity);
Last := Data'First - 1;
end case;
else
Last := Data'First + Stream_Element_Offset (Count) - 1;
end if;
end Encode;
procedure Finalize (Factory : in out Abstract_OpenSSL_Factory) is
begin
Finalize (Connections_Factory (Factory));
if Factory.Client_Context /= No_SSL_CTX then
SSL_CTX_free (Factory.Client_Context);
Factory.Client_Context := No_SSL_CTX;
end if;
if Factory.Server_Context /= No_SSL_CTX then
SSL_CTX_free (Factory.Server_Context);
Factory.Server_Context := No_SSL_CTX;
end if;
end Finalize;
procedure Finalize (Session : in out OpenSSL_Session) is
begin
if Session.SSL_Session /= No_SSL then
SSL_free (Session.SSL_Session);
Session.SSL_Session := No_SSL;
end if;
Finalize (Encoder (Session));
end Finalize;
function Get_Cipher_List (Session : SSL; Priority : int)
return String is
Result : constant chars_ptr :=
SSL_get_cipher_list (Session, Priority);
begin
if Result = Null_Ptr then
return "";
else
return Value (Result);
end if;
end Get_Cipher_List;
function Get_Name_Of_Cipher
( Session : SSL;
Index : Positive
) return String is
Stack : OPENSSL_STACK;
Cipher : SSL_CIPHER;
No : int := int (Index);
begin
Stack := SSL_get_ciphers (Session);
if Stack /= No_STACK then
if No <= OPENSSL_sk_num (Stack) then
Cipher := OPENSSL_sk_value (Stack, No - 1);
if Cipher = No_CIPHER then
return "";
else
return +SSL_CIPHER_get_name (Cipher);
end if;
end if;
end if;
Raise_Exception
( Constraint_Error'Identity,
"Wrong cipher number"
);
end Get_Name_Of_Cipher;
function Get_Name_Of_Cipher
( Factory : Abstract_OpenSSL_Factory;
Context : Context_Type;
Index : Positive
) return String is
Result : Natural := 0;
Stack : OPENSSL_STACK;
Cipher : SSL_CIPHER;
No : int := int (Index);
begin
if Context in Client_Context..Any_Context then
if Factory.Client_Context /= No_SSL_CTX then
Stack := SSL_CTX_get_ciphers (Factory.Client_Context);
if Stack /= No_STACK then
if No <= OPENSSL_sk_num (Stack) then
Cipher := OPENSSL_sk_value (Stack, No - 1);
if Cipher = No_CIPHER then
return "";
else
return +SSL_CIPHER_get_name (Cipher);
end if;
else
No := No - OPENSSL_sk_num (Stack);
end if;
end if;
end if;
end if;
if Context in Any_Context..Server_Context then
if Factory.Server_Context /= No_SSL_CTX then
Stack := SSL_CTX_get_ciphers (Factory.Server_Context);
if Stack /= No_STACK then
if No <= OPENSSL_sk_num (Stack) then
Cipher := OPENSSL_sk_value (Stack, No - 1);
if Cipher = No_CIPHER then
return "";
else
return +SSL_CIPHER_get_name (Cipher);
end if;
else
No := No - OPENSSL_sk_num (Stack);
end if;
end if;
end if;
end if;
Raise_Exception
( Constraint_Error'Identity,
"Wrong cipher number"
);
end Get_Name_Of_Cipher;
function Get_Name_Of_Client_Cipher
( Session : SSL;
Index : Positive
) return String is
Stack : OPENSSL_STACK;
Cipher : SSL_CIPHER;
No : int := int (Index);
begin
Stack := SSL_get_client_ciphers (Session);
if Stack /= No_STACK then
if No <= OPENSSL_sk_num (Stack) then
Cipher := OPENSSL_sk_value (Stack, No - 1);
if Cipher = No_CIPHER then
return "";
else
return +SSL_CIPHER_get_name (Cipher);
end if;
end if;
end if;
Raise_Exception
( Constraint_Error'Identity,
"Wrong cipher number"
);
end Get_Name_Of_Client_Cipher;
function Get_Name_Of_Supported_Cipher
( Session : SSL;
Index : Positive
) return String is
Stack : OPENSSL_STACK;
Cipher : SSL_CIPHER;
No : int := int (Index);
begin
Stack := SSL_get1_supported_ciphers (Session);
if Stack /= No_STACK then
if No <= OPENSSL_sk_num (Stack) then
Cipher := OPENSSL_sk_value (Stack, No - 1);
if Cipher = No_CIPHER then
return "";
else
return +SSL_CIPHER_get_name (Cipher);
end if;
end if;
end if;
Raise_Exception
( Constraint_Error'Identity,
"Wrong cipher number"
);
end Get_Name_Of_Supported_Cipher;
function Get_Number_Of_Ciphers (Session : SSL) return Natural is
Stack : OPENSSL_STACK;
begin
Stack := SSL_get_ciphers (Session);
if Stack = No_STACK then
return 0;
else
return Natural (OPENSSL_sk_num (Stack));
end if;
end Get_Number_Of_Ciphers;
function Get_Number_Of_Ciphers
( Factory : Abstract_OpenSSL_Factory;
Context : Context_Type
) return Natural is
Result : int := 0;
Stack : OPENSSL_STACK;
begin
if Context in Client_Context..Any_Context then
if Factory.Client_Context /= No_SSL_CTX then
Stack := SSL_CTX_get_ciphers (Factory.Client_Context);
if Stack /= No_STACK then
Result := Result + OPENSSL_sk_num (Stack);
end if;
end if;
end if;
if Context in Any_Context..Server_Context then
if Factory.Server_Context /= No_SSL_CTX then
Stack := SSL_CTX_get_ciphers (Factory.Server_Context);
if Stack /= No_Stack then
Result := Result + OPENSSL_sk_num (Stack);
end if;
end if;
end if;
return Natural (Result);
end Get_Number_Of_Ciphers;
function Get_Number_Of_Client_Ciphers (Session : SSL)
return Natural is
Stack : OPENSSL_STACK;
begin
Stack := SSL_get_client_ciphers (Session);
if Stack = No_STACK then
return 0;
else
return Natural (OPENSSL_sk_num (Stack));
end if;
end Get_Number_Of_Client_Ciphers;
function Get_Number_Of_Supported_Ciphers (Session : SSL)
return Natural is
Stack : OPENSSL_STACK;
begin
Stack := SSL_get1_supported_ciphers (Session);
if Stack = No_STACK then
return 0;
else
return Natural (OPENSSL_sk_num (Stack));
end if;
end Get_Number_Of_Supported_Ciphers;
function Get_Options (Session : SSL) return SSL_OP is
begin
return SSL_get_options (Session);
end Get_Options;
function Get_Options
( Factory : Abstract_OpenSSL_Factory;
Context : Context_Type
) return SSL_OP is
Result : SSL_OP := 0;
begin
if Context in Client_Context..Any_Context then
if Factory.Client_Context /= No_SSL_CTX then
Result := Result
or SSL_CTX_get_options (Factory.Client_Context);
end if;
end if;
if Context in Any_Context..Server_Context then
if Factory.Server_Context /= No_SSL_CTX then
Result := Result
or SSL_CTX_get_options (Factory.Server_Context);
end if;
end if;
return Result;
end Get_Options;
procedure Get_Proto_Version
( Session : SSL;
Minimal : out SSL_Version_No;
Maximal : out SSL_Version_No
) is
begin
Minimal :=
SSL_Version_No
( SSL_ctrl (Session, SSL_CTRL_GET_MIN_PROTO_VERSION, 0)
);
Maximal :=
SSL_Version_No
( SSL_ctrl (Session, SSL_CTRL_GET_MAX_PROTO_VERSION, 0)
);
end Get_Proto_Version;
procedure Get_Proto_Version
( Factory : Abstract_OpenSSL_Factory;
Context : Context_Type;
Minimal : out SSL_Version_No;
Maximal : out SSL_Version_No
) is
begin
Minimal := 0;
Maximal := SSL_Version_No'Last;
if ( Context in Client_Context..Any_Context
and then
Factory.Client_Context /= No_SSL_CTX
) then
Minimal :=
SSL_Version_No'Max
( Minimal,
SSL_Version_No
( SSL_CTX_ctrl
( Factory.Client_Context,
SSL_CTRL_GET_MIN_PROTO_VERSION,
0
) ) );
Maximal :=
SSL_Version_No'Min
( Maximal,
SSL_Version_No
( SSL_CTX_ctrl
( Factory.Client_Context,
SSL_CTRL_GET_MAX_PROTO_VERSION,
0
) ) );
end if;
if ( Context in Any_Context..Server_Context
and then
Factory.Server_Context /= No_SSL_CTX
) then
Minimal :=
SSL_Version_No'Max
( Minimal,
SSL_Version_No
( SSL_CTX_ctrl
( Factory.Server_Context,
SSL_CTRL_GET_MIN_PROTO_VERSION,
0
) ) );
Maximal :=
SSL_Version_No'Min
( Maximal,
SSL_Version_No
( SSL_CTX_ctrl
( Factory.Server_Context,
SSL_CTRL_GET_MAX_PROTO_VERSION,
0
) ) );
end if;
end Get_Proto_Version;
function Get_Shared_Ciphers (Session : SSL) return String is
List : chars_ptr;
Buffer : char_array (1..1024);
begin
List := SSL_get_shared_ciphers (Session, Buffer, Buffer'Length);
if List = Null_Ptr then
return "";
else
return Value (List);
end if;
end Get_Shared_Ciphers;
function Get_Session
( Client : Connection'Class
) return SSL is
begin
return OpenSSL_Session (Client.Transport.all).SSL_Session;
end Get_Session;
procedure Handshake_Completed
( Factory : in out Abstract_OpenSSL_Factory;
Client : in out Connection'Class;
Session : SSL
) is
begin
null;
end Handshake_Completed;
function Is_TLS_Capable
( Factory : Abstract_OpenSSL_Factory
) return Boolean is
begin
return True;
end Is_TLS_Capable;
function Is_Trace_Decoded (Factory : Abstract_OpenSSL_Factory)
return Boolean is
begin
return Factory.Trace_Decoded;
end Is_Trace_Decoded;
function Is_Trace_Session (Factory : Abstract_OpenSSL_Factory)
return Boolean is
begin
return Factory.Trace_Session;
end Is_Trace_Session;
procedure Load_Verify_Locations
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
CA_File : String := "";
CA_Path : String := ""
) is
File : aliased char_array := To_C (CA_File);
Path : aliased char_array := To_C (CA_Path);
Result : int;
begin
if CA_File = "" and then CA_Path = "" then
return;
end if;
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if CA_Path = "" then
Result := SSL_CTX_load_verify_locations
( Factory.Client_Context,
To_Chars_Ptr (File'Unchecked_Access),
Null_Ptr
);
elsif CA_File = "" then
Result := SSL_CTX_load_verify_locations
( Factory.Client_Context,
Null_Ptr,
To_Chars_Ptr (Path'Unchecked_Access)
);
else
Result := SSL_CTX_load_verify_locations
( Factory.Client_Context,
To_Chars_Ptr (File'Unchecked_Access),
To_Chars_Ptr (Path'Unchecked_Access)
);
end if;
end if;
if Result <= 0 then
Check_Error (Use_Error'Identity);
end if;
if Context in Any_Context..Server_Context then
if CA_Path = "" then
Result := SSL_CTX_load_verify_locations
( Factory.Server_Context,
To_Chars_Ptr (File'Unchecked_Access),
Null_Ptr
);
elsif CA_File = "" then
Result := SSL_CTX_load_verify_locations
( Factory.Server_Context,
Null_Ptr,
To_Chars_Ptr (Path'Unchecked_Access)
);
else
Result := SSL_CTX_load_verify_locations
( Factory.Server_Context,
To_Chars_Ptr (File'Unchecked_Access),
To_Chars_Ptr (Path'Unchecked_Access)
);
end if;
end if;
if Result <= 0 then
Check_Error (Use_Error'Identity);
end if;
end Load_Verify_Locations;
procedure Process
( Transport : in out OpenSSL_Session;
Listener : in out Connections_Server'Class;
Client : in out Connection'Class;
Data_Left : out Boolean
) is
Result : int;
begin
case Transport.State is
when TLS_Handshake =>
if Client.Client then -- A client
Result := SSL_connect (Transport.SSL_Session);
else
Result := SSL_accept (Transport.SSL_Session);
end if;
if Result <= 0 then
case SSL_get_error (Transport.SSL_Session, Result) is
when SSL_ERROR_NONE =>
null;
when SSL_ERROR_ZERO_RETURN =>
raise Connection_Error;
when SSL_ERROR_WANT_ACCEPT |
SSL_ERROR_WANT_CLIENT_HELLO_CB |
SSL_ERROR_WANT_CONNECT |
SSL_ERROR_WANT_READ |
SSL_ERROR_WANT_WRITE |
SSL_ERROR_WANT_X509_LOOKUP =>
Data_Left := Has_Data (Client);
return; -- Pump I/O
when others =>
Check_Error (Data_Error'Identity);
Data_Left := Has_Data (Client);
return;
end case;
end if;
declare
Factory : Abstract_OpenSSL_Factory'Class renames
Abstract_OpenSSL_Factory'Class
( Listener.Factory.all
);
begin
begin
Handshake_Completed
( Factory,
Client,
Transport.SSL_Session
);
exception
when Connection_Error =>
if Factory.Trace_Session then
Trace
( Factory,
"OpenSSL successful handshake rejected"
);
end if;
raise;
when Error : others =>
if Factory.Trace_Session then
Trace
( Factory,
"OpenSSL successful handshake rejected"
);
end if;
Trace_Error
( Factory,
"OpenSSL handshake completion",
Error
);
raise Connection_Error;
end;
Transport.State := TLS_Exchange;
if Factory.Trace_Session then
if 0 = SSL_session_reused (Transport.SSL_Session) then
Trace
( Factory,
"OpenSSL handshake successful, new session"
);
else
Trace
( Factory,
"OpenSSL handshake successful, resumed session"
);
end if;
end if;
declare
Saved : constant Session_State := Client.Session;
begin
Client.Session := Session_Connected;
if Is_Opportunistic (Client) then
Elevated (Client);
else
Connected (Client);
end if;
Connected (Listener, Client);
Client.Session := Session_Active;
exception
when others =>
if Client.Session = Session_Connected then
Client.Session := Saved;
end if;
raise;
end;
end;
Data_Left := Has_Data (Client);
when TLS_Exchange =>
null;
end case;
loop
Decrypt (Transport, Client, Data_Left);
exit when not Data_Left;
Process (Transport.Buffer, Client, Data_Left);
exit when Data_Left; -- Won't handle it right now
end loop;
end Process;
procedure Prepare
( Factory : in out Abstract_OpenSSL_Factory;
Client : in out Connection'Class;
Session : SSL
) is
begin
null;
end Prepare;
procedure Read
( Client : in out Connection'Class;
Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
Start : Stream_Element_Offset := Pointer;
begin
Pull (Client.Read, Data, Pointer);
exception
when Error : others =>
Trace_Error
( Client.Socket_Listener.Factory.all,
"OpenSSL transport reading",
Error
);
raise;
end Read;
procedure Set_Cipher_List (Session : SSL; List : String) is
begin
if SSL_set_cipher_list (Session, To_C (List)) <= 0 then
Check_Error (Use_Error'Identity);
end if;
end Set_Cipher_List;
procedure Set_Cipher_List
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
List : String
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if SSL_CTX_set_cipher_list
( Factory.Client_Context,
To_C (List)
) <= 0
then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if SSL_CTX_set_cipher_list
( Factory.Server_Context,
To_C (List)
) <= 0
then
Check_Error (Use_Error'Identity);
end if;
end if;
end Set_Cipher_List;
procedure Set_Cipher_Suites (Session : SSL; List : String) is
begin
if SSL_set_ciphersuites (Session, To_C (List)) <= 0 then
Check_Error (Use_Error'Identity);
end if;
end Set_Cipher_Suites;
procedure Set_Cipher_Suites
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
List : String
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if SSL_CTX_set_ciphersuites
( Factory.Client_Context,
To_C (List)
) <= 0
then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if SSL_CTX_set_ciphersuites
( Factory.Server_Context,
To_C (List)
) <= 0
then
Check_Error (Use_Error'Identity);
end if;
end if;
end Set_Cipher_Suites;
procedure Set_Default_Verify_Dir
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_set_default_verify_dir (Factory.Client_Context)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_set_default_verify_dir (Factory.Server_Context)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Set_Default_Verify_Dir;
procedure Set_Default_Verify_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_set_default_verify_file (Factory.Client_Context)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_set_default_verify_file (Factory.Server_Context)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Set_Default_Verify_File;
procedure Set_Default_Verify_Paths
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_set_default_verify_paths (Factory.Client_Context)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_set_default_verify_paths (Factory.Server_Context)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Set_Default_Verify_Paths;
procedure Set_Options (Session : SSL; Options : SSL_OP) is
Result : SSL_OP;
begin
Result := SSL_set_options (Session, Options);
end Set_Options;
procedure Set_Options
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
Options : SSL_OP
) is
Result : SSL_OP;
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
Result :=
SSL_CTX_set_options (Factory.Client_Context, Options);
end if;
if Context in Any_Context..Server_Context then
Result :=
SSL_CTX_set_options (Factory.Server_Context, Options);
end if;
end Set_Options;
procedure Set_Proto_Version
( Session : SSL;
Minimal : SSL_Version_No;
Maximal : SSL_Version_No
) is
begin
if ( SSL_ctrl
( Session,
SSL_CTRL_SET_MIN_PROTO_VERSION,
long (Minimal)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
if ( SSL_ctrl
( Session,
SSL_CTRL_SET_MAX_PROTO_VERSION,
long (Maximal)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Set_Proto_Version;
procedure Set_Proto_Version
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
Minimal : SSL_Version_No;
Maximal : SSL_Version_No
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_ctrl
( Factory.Client_Context,
SSL_CTRL_SET_MIN_PROTO_VERSION,
long (Minimal)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
if ( SSL_CTX_ctrl
( Factory.Client_Context,
SSL_CTRL_SET_MAX_PROTO_VERSION,
long (Maximal)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_ctrl
( Factory.Server_Context,
SSL_CTRL_SET_MIN_PROTO_VERSION,
long (Minimal)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
if ( SSL_CTX_ctrl
( Factory.Server_Context,
SSL_CTRL_SET_MAX_PROTO_VERSION,
long (Maximal)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Set_Proto_Version;
procedure Set_TLS_Tracing
( Factory : in out Abstract_OpenSSL_Factory;
Session : Boolean;
Decoded : Boolean
) is
begin
Factory.Trace_Session := Session;
Factory.Trace_Decoded := Decoded;
end Set_TLS_Tracing;
procedure Use_Certificate_Chain_File
( Session : SSL;
File : String
) is
begin
if SSL_use_certificate_chain_file (Session, To_C (File)) <= 0
then
Check_Error (Use_Error'Identity);
end if;
end Use_Certificate_Chain_File;
procedure Use_Certificate_Chain_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
File : String
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_certificate_chain_file
( Factory.Client_Context,
To_C (File)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_certificate_chain_file
( Factory.Server_Context,
To_C (File)
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_Certificate_Chain_File;
procedure Use_Certificate_ASN1
( Session : SSL;
Certificate : Stream_Element_Array
) is
begin
if ( SSL_use_certificate_ASN1
( Session,
Certificate'Length,
Certificate (Certificate'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_Certificate_ASN1;
procedure Use_Certificate_ASN1
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
Certificate : Stream_Element_Array
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_certificate_ASN1
( Factory.Client_Context,
Certificate'Length,
Certificate (Certificate'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_certificate_ASN1
( Factory.Server_Context,
Certificate'Length,
Certificate (Certificate'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_Certificate_ASN1;
procedure Use_Certificate_ASN1_File
( Session : SSL;
File : String
) is
begin
if ( SSL_use_certificate_file
( Session,
To_C (File),
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_Certificate_ASN1_File;
procedure Use_Certificate_ASN1_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
File : String
) is
Name : aliased char_array := To_C (File);
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_certificate_file
( Factory.Client_Context,
Name,
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_certificate_file
( Factory.Server_Context,
Name,
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_Certificate_ASN1_File;
procedure Use_Certificate_PEM_File
( Session : SSL;
File : String
) is
begin
if ( SSL_use_certificate_file
( Session,
To_C (File),
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_Certificate_PEM_File;
procedure Use_Certificate_PEM_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
File : String
) is
Name : aliased char_array := To_C (File);
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_certificate_file
( Factory.Client_Context,
Name,
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_certificate_file
( Factory.Server_Context,
Name,
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_Certificate_PEM_File;
procedure Use_Key_ASN1
( Session : SSL;
Key : Stream_Element_Array
) is
begin
if ( SSL_use_PrivateKey_ASN1
( Session,
Key'Length,
Key (Key'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_Key_ASN1;
procedure Use_Key_ASN1
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
Key : Stream_Element_Array
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_PrivateKey_ASN1
( Factory.Client_Context,
Key'Length,
Key (Key'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_PrivateKey_ASN1
( Factory.Server_Context,
Key'Length,
Key (Key'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_Key_ASN1;
procedure Use_Key_ASN1_File
( Session : SSL;
File : String
) is
begin
if ( SSL_use_PrivateKey_file
( Session,
To_C (File),
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_Key_ASN1_File;
procedure Use_Key_ASN1_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
File : String
) is
Name : aliased char_array := To_C (File);
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_PrivateKey_file
( Factory.Client_Context,
Name,
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_PrivateKey_file
( Factory.Server_Context,
Name,
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_Key_ASN1_File;
procedure Use_Key_PEM_File
( Session : SSL;
File : String
) is
begin
if ( SSL_use_PrivateKey_file
( Session,
To_C (File),
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_Key_PEM_File;
procedure Use_Key_PEM_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
File : String
) is
Name : aliased char_array := To_C (File);
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_PrivateKey_file
( Factory.Client_Context,
Name,
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_PrivateKey_file
( Factory.Server_Context,
Name,
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_Key_PEM_File;
procedure Use_RSA_Key_ASN1
( Session : SSL;
Key : Stream_Element_Array
) is
begin
if ( SSL_use_RSAPrivateKey_ASN1
( Session,
Key'Length,
Key (Key'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_RSA_Key_ASN1;
procedure Use_RSA_Key_ASN1
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
Key : Stream_Element_Array
) is
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_RSAPrivateKey_ASN1
( Factory.Client_Context,
Key'Length,
Key (Key'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_RSAPrivateKey_ASN1
( Factory.Server_Context,
Key'Length,
Key (Key'First)'Address
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_RSA_Key_ASN1;
procedure Use_RSA_Key_ASN1_File
( Session : SSL;
File : String
) is
begin
if ( SSL_use_RSAPrivateKey_file
( Session,
To_C (File),
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_RSA_Key_ASN1_File;
procedure Use_RSA_Key_ASN1_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
File : String
) is
Name : aliased char_array := To_C (File);
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_RSAPrivateKey_file
( Factory.Client_Context,
Name,
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_RSAPrivateKey_file
( Factory.Server_Context,
Name,
SSL_FILETYPE_ASN1
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_RSA_Key_ASN1_File;
procedure Use_RSA_Key_PEM_File
( Session : SSL;
File : String
) is
begin
if ( SSL_use_RSAPrivateKey_file
( Session,
To_C (File),
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end Use_RSA_Key_PEM_File;
procedure Use_RSA_Key_PEM_File
( Factory : in out Abstract_OpenSSL_Factory;
Context : Context_Type;
File : String
) is
Name : aliased char_array := To_C (File);
begin
Create_Context (Factory, Context);
if Context in Client_Context..Any_Context then
if ( SSL_CTX_use_RSAPrivateKey_file
( Factory.Client_Context,
Name,
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
if Context in Any_Context..Server_Context then
if ( SSL_CTX_use_RSAPrivateKey_file
( Factory.Server_Context,
Name,
SSL_FILETYPE_PEM
)
<= 0
) then
Check_Error (Use_Error'Identity);
end if;
end if;
end Use_RSA_Key_PEM_File;
procedure Write
( Client : in out Connection'Class;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
Last : Stream_Element_Offset;
begin
Send_Socket
( Get_Socket (Client),
Data (Pointer..Data'Last),
Last
);
if ( Last >= Pointer
and then
Is_Trace_Received_On
( Client.Socket_Listener.Factory.all,
Trace_Encoded
) )
then
Trace_Sent
( Factory => Client.Socket_Listener.Factory.all,
Client => Client,
Data => Data,
From => Pointer,
To => Last,
Encoded => True
);
end if;
if Last >= Pointer then
Client.Data_Sent := True;
Pointer := Last + 1;
end if;
exception
when Error : Socket_Error =>
Send_Error (Client, Error);
raise;
when Error : others =>
Trace_Error
( Client.Socket_Listener.Factory.all,
"OpenSSL transport writing",
Error
);
raise;
end Write;
end GNAT.Sockets.Server.OpenSSL;
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