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{
This file is part of the Free Component Library (FCL)
Copyright (c) 1999-2000 by the Free Pascal development team
Small OOP wrapper around OpenSSL unit.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program 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.
**********************************************************************}
unit fpopenssl;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, openssl, ctypes;
Type
TSSLType = (stAny,stSSLv2,stSSLv3,stTLSv1,stTLSv1_1,stTLSv1_2);
// PASN1_INTEGER = SslPtr;
{ TSSLData }
TSSLData = Class(TPersistent)
private
FFileName: String;
FValue: String;
Public
Function Empty : Boolean;
Procedure Assign(Source : TPersistent);override;
Property FileName : String Read FFileName Write FFileName;
Property Value: String Read FValue Write FValue;
end;
{ TSocketHandler }
{ TSSLContext }
TSSLContext = Class(TObject)
private
FCTX: PSSL_CTX;
function UsePrivateKey(pkey: SslPtr): cInt;
function UsePrivateKeyASN1(pk: cInt; d: String; len: cLong): cInt;
function UsePrivateKeyFile(const Afile: String; Atype: cInt): cInt;
Public
Constructor Create(AContext : PSSL_CTX = Nil); overload;
Constructor Create(AType : TSSLType); overload;
Destructor Destroy; override;
Function SetCipherList(Var ACipherList : String) : Integer;
procedure SetVerify(mode: Integer; arg2: PFunction);
procedure SetDefaultPasswdCb(cb: PPasswdCb);
procedure SetDefaultPasswdCbUserdata(u: SslPtr);
Function UsePrivateKey(Data : TSSLData) : cint;
// Use certificate.
Function UseCertificate(Data : TSSLData) : cint;
function UseCertificateASN1(len: cLong; d: String):cInt;
function UseCertificateFile(const Afile: String; Atype: cInt):cInt;
function UseCertificateChainFile(const Afile: PChar):cInt;
function UseCertificate(x: SslPtr):cInt;
function LoadVerifyLocations(const CAfile: String; const CApath: String):cInt;
function LoadPFX(Const S,APassword : AnsiString) : cint;
function LoadPFX(Data : TSSLData; Const APAssword : Ansistring) : cint;
function SetOptions(AOptions: cLong): cLong;
Property CTX: PSSL_CTX Read FCTX;
end;
TSSL = Class(TObject)
Public
FSSL : PSSL;
Public
Constructor Create(ASSL : PSSL = Nil);
Constructor Create(AContext : TSSLContext);
destructor Destroy; override;
function SetFd(fd: cInt):cInt;
function Accept : cInt;
function Connect : cInt;
function Shutdown : cInt;
function Read(buf: SslPtr; num: cInt):cInt;
function Peek(buf: SslPtr; num: cInt):cInt;
function Write(buf: SslPtr; num: cInt):cInt;
Function PeerCertificate : PX509;
function Ctrl(cmd: cInt; larg: clong; parg: Pointer): cInt;
function Pending:cInt;
Function GetError(AResult :cint) : cint;
function GetCurrentCipher :SslPtr;
function Version: String;
function PeerName: string;
function PeerNameHash: cardinal;
function PeerSubject : String;
Function PeerIssuer : String;
Function PeerSerialNo : Integer;
Function PeerFingerprint : String;
Function CertInfo : String;
function CipherName: string;
function CipherBits: integer;
function CipherAlgBits: integer;
Function VerifyResult : Integer;
Property SSL: PSSL Read FSSL;
end;
ESSL = Class(Exception);
Function BioToString(B : PBIO) : AnsiString;
implementation
Resourcestring
SErrCountNotGetContext = 'Failed to create SSL Context';
SErrFailedToCreateSSL = 'Failed to create SSL';
Function BioToString(B : PBIO) : AnsiString;
Var
L,RL : Integer;
begin
l:=bioctrlpending(B);
Result:=StringOfChar(#0,l);
RL:=BioRead(B,Result,L);
if (RL>0) then
SetLength(Result,RL)
else
SetLength(Result,0);
end;
{ TSSLContext }
Constructor TSSLContext.Create(AContext: PSSL_CTX);
begin
FCTX:=AContext
end;
Constructor TSSLContext.Create(AType: TSSLType);
Var
C : PSSL_CTX;
begin
C := nil;
Case AType of
stAny: C := SslCtxNew(SslMethodV23);
stSSLv2: C := SslCtxNew(SslMethodV2);
stSSLv3: C := SslCtxNew(SslMethodV3);
stTLSv1: C := SslCtxNew(SslMethodTLSV1);
stTLSv1_1: C := SslCtxNew(SslMethodTLSV1_1);
stTLSv1_2: C := SslCtxNew(SslMethodTLSV1_2);
end;
if (C=Nil) then
Raise ESSL.Create(SErrCountNotGetContext);
Create(C);
end;
Destructor TSSLContext.Destroy;
begin
SslCtxFree(FCTX);
inherited Destroy;
end;
Function TSSLContext.SetCipherList(Var ACipherList: String): Integer;
begin
Result:=SSLCTxSetCipherList(FCTX,ACipherList);
end;
procedure TSSLContext.SetVerify(mode: Integer; arg2: PFunction);
begin
SslCtxSetVerify(FCtx,Mode,arg2);
end;
procedure TSSLContext.SetDefaultPasswdCb(cb: PPasswdCb);
begin
SslCtxSetDefaultPasswdCb(Fctx,cb)
end;
procedure TSSLContext.SetDefaultPasswdCbUserdata(u: SslPtr);
begin
SslCtxSetDefaultPasswdCbUserdata(FCTX,u);
end;
function TSSLContext.UsePrivateKey(pkey: SslPtr):cInt;
begin
Result:=SslCtxUsePrivateKey(FCTX,pkey);
end;
function TSSLContext.UsePrivateKeyASN1(pk: cInt; d: String; len: cLong):cInt;
begin
Result:=SslCtxUsePrivateKeyASN1(pk,FCtx,d,len);
end;
function TSSLContext.UsePrivateKeyFile(const Afile: String; Atype: cInt):cInt;
begin
Result:=SslCtxUsePrivateKeyFile(FCTX,AFile,AType);
end;
Function TSSLContext.UsePrivateKey(Data: TSSLData): cint;
Var
S : AnsiString;
begin
Result:=-1;
If (Data.Value<>'') then
begin
S:=Data.Value;
Result:=UsePrivateKeyASN1(EVP_PKEY_RSA,S,length(S));
end
else if (Data.FileName<>'') then
begin
S:=Data.FileName;
Result:=UsePrivateKeyFile(S,SSL_FILETYPE_PEM);
if (Result<>1) then
Result:=UsePrivateKeyFile(S,SSL_FILETYPE_ASN1);
end;
end;
Function TSSLContext.UseCertificate(Data: TSSLData): cint;
Var
S : AnsiString;
begin
Result:=-1;
if (Data.Value<>'') then
begin
S:=Data.Value;
Result:=UseCertificateASN1(length(S),S);
end
else if (Data.FileName<>'') then
begin
S:=Data.FileName;
Result:=UseCertificateChainFile(PChar(S));
if Result<>1 then
begin
Result:=UseCertificateFile(S,SSL_FILETYPE_PEM);
if Result<>1 then
Result:=UseCertificateFile(S,SSL_FILETYPE_ASN1);
end;
end
end;
function TSSLContext.UseCertificateASN1(len: cLong; d: String): cInt;
begin
Result:=sslctxUseCertificateASN1(FCTX,len,d);
end;
function TSSLContext.UseCertificateFile(const Afile: String; Atype: cInt): cInt;
begin
Result:=sslctxUseCertificateFile(FCTX,Afile,Atype);
end;
function TSSLContext.UseCertificateChainFile(const Afile: PChar): cInt;
begin
Result:=sslctxUseCertificateChainFile(FCTX,Afile);
end;
function TSSLContext.UseCertificate(x: SslPtr): cInt;
begin
Result:=SSLCTXusecertificate(FCTX,X);
end;
function TSSLContext.LoadVerifyLocations(const CAfile: String; const CApath: String): cInt;
begin
Result:=SslCtxLoadVerifyLocations(FCTX,CAfile,CApath);
end;
function TSSLContext.LoadPFX(Const S, APassword: AnsiString): cint;
var
b: PBIO;
p12,c,pk,ca: SslPtr;
begin
Result:=-1;
c:=nil;
pk:=nil;
ca:=nil;
p12:=Nil;
b:=BioNew(BioSMem);
try
BioWrite(b,S,Length(S));
p12:=d2iPKCS12bio(b,nil);
finally
BioFreeAll(b);
end;
if Not Assigned(p12) then
Exit;
try
try
if PKCS12parse(p12,APassword,pk,c,ca)>0 then
begin
Result:=UseCertificate(c);
if (Result>0) then
Result:=UsePrivateKey(pk);
end;
finally
EvpPkeyFree(pk);
X509free(c);
// SkX509PopFree(ca,_X509Free);
end;
finally
PKCS12free(p12);
end;
end;
function TSSLContext.LoadPFX(Data: TSSLData; Const APAssword : Ansistring): cint;
Var
S : String;
begin
Result:=-1;
try
if (Data.Value<>'') then
S:=Data.Value
else
With TFileStream.Create(Data.FileName,fmOpenRead or fmShareDenyNone) do
Try
SetLength(S,Size);
ReadBuffer(S[1],Size);
finally
Free;
end;
Result:=LoadPFX(s,APassword);
except
// Silently ignore
Exit;
end;
end;
function TSSLContext.SetOptions(AOptions: cLong): cLong;
begin
result := SslCtxCtrl(FCTX, SSL_CTRL_OPTIONS, AOptions, nil);
end;
{ TSSLData }
Function TSSLData.Empty: Boolean;
begin
Result:=(Value='') and (FileName='');
end;
Procedure TSSLData.Assign(Source: TPersistent);
begin
if Source is TSSLData then
With TSSLData(Source) do
begin
Self.FValue:=FValue;
Self.FFileName:=FFileName;
end
else
inherited Assign(Source);
end;
{ TSSL }
Constructor TSSL.Create(ASSL: PSSL);
begin
FSSL:=ASSL;
end;
Constructor TSSL.Create(AContext: TSSLContext);
begin
FSSL:=Nil;
if Assigned(AContext) and Assigned(AContext.CTX) then
FSSL:=sslNew(AContext.CTX);
If (FSSL=Nil) then
Raise ESSL.Create(SErrFailedToCreateSSL)
end;
destructor TSSL.Destroy;
begin
sslfree(FSSL);
inherited Destroy;
end;
function TSSL.Ctrl(cmd: cInt; larg: clong; parg: Pointer): cInt;
begin
Result:=sslCtrl(fSSL,cmd,larg,parg);
end;
function TSSL.SetFd(fd: cInt): cInt;
begin
Result:=sslSetFD(fSSL,fd);
end;
function TSSL.Accept: cInt;
begin
Result:=sslAccept(fSSL);
end;
function TSSL.Connect: cInt;
begin
Result:=sslConnect(fSSL);
end;
function TSSL.Shutdown: cInt;
begin
Result:=sslShutDown(fSSL);
end;
function TSSL.Read(buf: SslPtr; num: cInt): cInt;
begin
Result:=sslRead(FSSL,buf,num);
end;
function TSSL.Peek(buf: SslPtr; num: cInt): cInt;
begin
Result:=sslPeek(FSSL,buf,num);
end;
function TSSL.Write(buf: SslPtr; num: cInt): cInt;
begin
Result:=sslWrite(FSSL,buf,num);
end;
Function TSSL.PeerCertificate: PX509;
begin
Result:=sslGetPeercertificate(FSSL);
end;
function TSSL.Pending: cInt;
begin
Result:=sslPending(FSSL);
end;
Function TSSL.GetError(AResult: cint): cint;
begin
Result:=SslGetError(FSsl,AResult);
end;
function TSSL.GetCurrentCipher: SslPtr;
begin
Result:=SSLGetCurrentCipher(FSSL);
end;
function TSSL.Version: String;
begin
Result:=SSlGetVersion(FSsl);
end;
function TSSL.PeerName: string;
var
s : ansistring;
p : Integer;
begin
Result:='';
S:=PeerSubject;
P:=Pos(S,'/CN=');
if (P>0) then
begin
Delete(S,1,P+3);
P:=Pos('/',S);
if (P>0) then
Result:=Copy(S,1,P-1);
end;
end;
function TSSL.PeerNameHash: cardinal;
var
C : PX509;
begin
Result:=0;
c:=PeerCertificate;
if (C=Nil) then
exit;
try
Result:=X509NameHash(X509GetSubjectName(C));
finally
X509Free(C);
end;
end;
function TSSL.PeerSubject: String;
var
c : PX509;
s : ansistring;
begin
Result:='';
c:=PeerCertificate;
if Assigned(c) then
try
setlength(s, 4096);
Result:=X509NameOneline(X509GetSubjectName(c),s,Length(s));
finally
X509Free(c);
end;
end;
Function TSSL.PeerIssuer: String;
var
C: PX509;
S: ansistring;
begin
Result:='';
C:=PeerCertificate;
if (C=Nil) then
Exit;
try
S:=StringOfChar(#0,4096);
Result:=X509NameOneline(X509GetIssuerName(C),S,4096);
finally
X509Free(C);
end;
end;
Function TSSL.PeerSerialNo: Integer;
var
C : PX509;
SN : PASN1_INTEGER;
begin
Result:=-1;
C:=PeerCertificate;
if (C=Nil) then
exit;
try
SN:=X509GetSerialNumber(C);
Result:=Asn1IntegerGet(SN);
finally
X509Free(C);
end;
end;
Function TSSL.PeerFingerprint: String;
var
C : PX509;
L : integer;
begin
Result:='';
C:=PeerCertificate;
if (C=Nil) then
Exit;
try
Result:=StringOfChar(#0,EVP_MAX_MD_SIZE);
L:=0;
X509Digest(C,EvpGetDigestByName('MD5'),Result,L);
SetLength(Result,L);
finally
X509Free(C);
end;
end;
Function TSSL.CertInfo: String;
var
C : PX509;
B : PBIO;
begin
Result:='';
C:=PeerCertificate;
if (C=Nil) then
Exit;
try
B:=BioNew(BioSMem);
try
X509Print(B,C);
Result:=BioToString(B);
finally
BioFreeAll(B);
end;
finally
X509Free(C);
end;
end;
function TSSL.CipherName: string;
begin
Result:=SslCipherGetName(GetCurrentCipher);
end;
function TSSL.CipherBits: integer;
var
x: integer;
begin
x:=0;
Result:=SSLCipherGetBits(GetCurrentCipher,x);
end;
function TSSL.CipherAlgBits: integer;
begin
Result:=0;
SSLCipherGetBits(GetCurrentCipher,Result);
end;
Function TSSL.VerifyResult: Integer;
begin
Result:=SslGetVerifyResult(FSsl);
end;
end.
|