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1369 | ------------------------------------------------------------------
-- Tokeneer ID Station Support Software
--
-- Copyright (2003) United States Government, as represented
-- by the Director, National Security Agency. All rights reserved.
--
-- This material was originally developed by Praxis High Integrity
-- Systems Ltd. under contract to the National Security Agency.
------------------------------------------------------------------
------------------------------------------------------------------
-- CertProc
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
with CommonTypes;
with MsgProc;
with CryptoTypes;
with Ada.Strings.Fixed;
with Ada.Strings;
use type CommonTypes.Unsigned32T;
use type CryptoTypes.AlgorithmT;
use type CryptoTypes.IssuerT;
package body CertProc
with SPARK_Mode => Off -- exception handlers
is
------------------------------------------------------------------
-- Types
--
------------------------------------------------------------------
------------------------------------------------------------------
-- State
--
------------------------------------------------------------------
CryptoControlData : CryptoControlDataT := NullCryptoControl;
subtype RoleValues is Integer range 0..3;
type RoleFromT is array(RoleValues) of PrivTypes.PrivilegeT;
type RoleToT is array(PrivTypes.PrivilegeT) of RoleValues;
subtype ClassValues is Integer range 0..5;
type ClassFromT is array(ClassValues) of PrivTypes.ClassT;
type ClassToT is array (PrivTypes.ClassT) of ClassValues;
RoleFrom : constant RoleFromT := (
0 => PrivTypes.UserOnly,
1 => PrivTypes.Guard,
2 => PrivTypes.SecurityOfficer,
3 => PrivTypes.AuditManager
);
RoleTo : constant RoleToT := (
PrivTypes.UserOnly => 0,
PrivTypes.Guard => 1,
PrivTypes.SecurityOfficer => 2,
PrivTypes.AuditManager => 3
);
ClassFrom : constant ClassFromT := (
0 => PrivTypes.Unmarked,
1 => PrivTypes.Unclassified,
2 => PrivTypes.Restricted,
3 => PrivTypes.Confidential,
4 => PrivTypes.Secret,
5 => PrivTypes.Topsecret
);
ClassTo : constant ClassToT := (
PrivTypes.Unmarked => 0,
PrivTypes.Unclassified => 1,
PrivTypes.Restricted => 2,
PrivTypes.Confidential => 3,
PrivTypes.Secret => 4,
PrivTypes.Topsecret => 5
);
------------------------------------------------------------------
-- Local Subprograms
------------------------------------------------------------------
------------------------------------------------------------------
-- Extractname
--
-- Description:
-- Extracts the values from TheDict and checks the values are
-- in type. If values are invalid, or there is a problem extracting
-- the values, then NullIssuer is returned.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure ExtractName(TheDict : in MsgProc.DictionaryT;
TheName : out CryptoTypes.IssuerT)
is
TheNameString : String := MsgProc.GetStringByKey(
Dic => TheDict,
Key => "Text");
TheNameLength : Integer;
begin
TheNameLength := Integer'Value(
MsgProc.GetStringByKey(
Dic => TheDict,
Key => "TextLength"));
if TheNameLength <= CryptoTypes.NameI'Last then
TheName.NameLength := TheNameLength;
TheName.Name :=
-- Truncate the name if it is longer than the length
-- given
Ada.Strings.Fixed.Overwrite(
CryptoTypes.BlankName,
1,
Ada.Strings.Fixed.Head(TheNameString,
TheNameLength));
TheName.ID := CryptoTypes.IssuerIDT'Value(
MsgProc.GetStringByKey(
Dic => TheDict,
Key => "ID"));
else
TheName := CryptoTypes.NullIssuer;
end if;
exception
when E : others =>
TheName := CryptoTypes.NullIssuer;
end ExtractName;
------------------------------------------------------------------
-- ExtractValidity
--
-- Description:
-- Extracts the NotBefore and NotAfter dictionaries from TheDict
-- and checks the values are in type. If values are invalid, or
-- there is a problem extracting the values, then
-- a default value is set, and success is set False
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure ExtractValidity(TheDict : in MsgProc.DictionaryT;
TheValidity : out ValidityT;
Ok : out Boolean)
is
NB : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(Dic => TheDict,
Key => "NotBefore");
NA : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(Dic => TheDict,
Key => "NotAfter");
------------------------------------------------------------------
-- DateNotInType
--
-- Description:
-- Checks that the values are appropriate.
-- Minute in 0..59
-- Hour in 0..23
-- Day in 1..31
-- Month in 1..12
-- Year in 1901..2099
-- NB does not check that values are consistent with each other
-- (e.g. if Month is April, does not check that Day is 1..30)
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
function DateNotInType(TheDate : TimeT) return Boolean
is
begin
return TheDate.Year < 1901 or
TheDate.Year > 2099 or
TheDate.Month < 1 or
TheDate.Month > 12 or
TheDate.Day < 1 or
TheDate.Day > 31 or
TheDate.Hour > 23 or
TheDate.Minute > 59;
end DateNotInType;
begin
TheValidity.NotBefore.Minute := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NB,
Key => "Minute"));
TheValidity.NotBefore.Hour := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NB,
Key => "Hour"));
TheValidity.NotBefore.Day := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NB,
Key => "Day"));
TheValidity.NotBefore.Month := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NB,
Key => "Month"));
TheValidity.NotBefore.Year := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NB,
Key => "Year"));
TheValidity.NotAfter.Minute := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NA,
Key => "Minute"));
TheValidity.NotAfter.Hour := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NA,
Key => "Hour"));
TheValidity.NotAfter.Day := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NA,
Key => "Day"));
TheValidity.NotAfter.Month := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NA,
Key => "Month"));
TheValidity.NotAfter.Year := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => NA,
Key => "Year"));
if DateNotInType(TheValidity.NotAfter) or
DateNotInType(TheValidity.NotBefore) then
Ok := False;
TheValidity := (NotBefore => (Minute => 0,
Hour => 0,
Day => 1,
Month => 1,
Year => 1901),
NotAfter => (Minute => 0,
Hour => 0,
Day => 1,
Month => 1,
Year => 1901));
else
Ok := True;
end if;
end ExtractValidity;
------------------------------------------------------------------
-- RemoveHolder
--
-- Description:
-- Removes the Holder dictionary from the certificate.
-- Required when attempting to extract the Issuer, or the
-- SerialNumber.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure RemoveHolder(TheCert : in out CertTypes.RawCertificateT)
is
HolderDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "Holder");
HolderStart : Natural;
begin
HolderStart := Ada.Strings.Fixed.Index(TheCert,
String(HolderDict));
-- leave both braces, to ensure any further searches
-- will not be broken.
Ada.Strings.Fixed.Delete(TheCert,
HolderStart,
HolderStart + HolderDict'Length - 1);
exception
when E : others =>
TheCert := (others => ' ');
end RemoveHolder;
------------------------------------------------------------------
-- CheckCertLength
--
-- Description:
-- Checks the CertLength is consistent with the length
-- of the CertData dictionary.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure CheckCertLength (TheCert : in CertTypes.RawCertificateT;
Success : out Boolean)
is
TheCertLength : Integer;
TheCertData : constant String :=
String(MsgProc.GetDictionaryByKey(
MsgProc.DictionaryT(TheCert),
"CertDataT"));
begin
-- The CertLength field includes the braces enclosing the CertData dictionary
-- so subtract 2 from the length.
TheCertLength := Integer'Value(MsgProc.GetStringByKey(
MsgProc.DictionaryT(TheCert),
"CertLength")) - 2;
Success := TheCertData'Length = TheCertLength;
exception
when E : others =>
Success := False;
end CheckCertLength;
------------------------------------------------------------------
-- GetCertType
--
-- Description:
-- Determines the Certificate Type.
-- If Actual CertType found is not the same as the Expected
-- CertType, Success is set to False.
-- If the CertType is not found, Actual is set to an invalid
-- value, and Success is set to False.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetCertType (TheCert : in CertTypes.RawCertificateT;
Expected : in CommonTypes.Unsigned32T;
Actual : out CommonTypes.Unsigned32T;
Success : out Boolean)
is
begin
Actual := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "CertType"));
Success := Expected = Actual;
exception
when E : others =>
Actual := CommonTypes.Unsigned32T'Last;
Success := False;
end GetCertType;
------------------------------------------------------------------
-- GetSerialNumber
--
-- Description:
-- Attempts to extract the Certificate's Serial Number.
-- Success is set False if it is not found, or if it is invalid.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetSerialNumber (TheCert : in CertTypes.RawCertificateT;
CertType : in CommonTypes.Unsigned32T;
SerialNo : out CommonTypes.Unsigned32T;
Success : out Boolean)
is
LocalCert : CertTypes.RawCertificateT := TheCert;
begin
if CertType /= IDCertType then
-- Need to remove the 'Holder' dictionary from the certificate,
-- since this also contains a 'SerialNumber'.
RemoveHolder(LocalCert);
end if;
SerialNo := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => MsgProc.DictionaryT(LocalCert),
Key => "SerialNumber"));
Success := True;
exception
when E : others =>
SerialNo := CommonTypes.Unsigned32T'Last;
Success := False;
end GetSerialNumber;
------------------------------------------------------------------
-- GetSigAlgID
--
-- Description:
-- Attempts to extract the Certificate's SigAlgID field.
-- A check is made that it is equal to the AlgorithmID held in
-- the SignatureDate field.
-- Success is set False if it is not found, or if it is not
-- equal to the 'SignatureData' algorithm.
-- If either algortihm ID is not found, ID is set to 'First, and
-- Success to false.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetSigAlgID (TheCert : in CertTypes.RawCertificateT;
ID : out CryptoTypes.AlgorithmT;
Success : out Boolean)
is
SigDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "SignatureData");
IDFromSig : CryptoTypes.AlgorithmT;
begin
ID := CryptoTypes.AlgorithmT'Value(
MsgProc.GetStringByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "SigAlgID"));
IDFromSig := CryptoTypes.AlgorithmT'Value(
MsgProc.GetStringByKey(
Dic => SigDict,
Key => "AlgoRithmID"));
Success := ID = IDFromSig;
exception
when E : others =>
ID := CryptoTypes.AlgorithmT'First;
Success := False;
end GetSigAlgID;
------------------------------------------------------------------
-- GetName
--
-- Description:
-- Attempts to extract the Certificate's Issuer field, or
-- Subject field, depending on CertType and IsSubject.
-- If values are invalid, or there is a problem extracting
-- the values, then NullIssuer is returned, and Success is set
-- to False.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetName (TheCert : in CertTypes.RawCertificateT;
CertType : in CommonTypes.Unsigned32T;
IsSubject : in Boolean;
TheName : out CryptoTypes.IssuerT;
Success : out Boolean)
is
LocalCert : CertTypes.RawCertificateT := TheCert;
begin
if CertType /= IDCertType and
not IsSubject then
-- Need to remove the 'Holder' dictionary from the certificate,
-- since this also contains an 'Issuer'.
RemoveHolder(LocalCert);
end if;
if IsSubject then
declare
TheDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(LocalCert),
Key => "Subject");
begin
ExtractName(TheDict, TheName);
end;
else
declare
TheDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(LocalCert),
Key => "Issuer");
begin
ExtractName(TheDict, TheName);
end;
end if;
Success := TheName /= CryptoTypes.NullIssuer;
end GetName;
------------------------------------------------------------------
-- GetHolder
--
-- Description:
-- Attempts to extract the Certificate's Holder field.
-- If values are invalid, or there is a problem extracting
-- the values, then a Null holder is returned, and Success is set
-- to False.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetHolder (TheCert : in CertTypes.RawCertificateT;
TheHolder : out CertTypes.IDT;
Success : out Boolean)
is
HolderDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "Holder");
begin
ExtractName(HolderDict, TheHolder.Issuer);
TheHolder.SerialNumber := CertTypes.SerialNumberT'Value(
MsgProc.GetStringByKey(
Dic => HolderDict,
Key => "SerialNumber"));
Success := TheHolder.Issuer /= CryptoTypes.NullIssuer;
exception
when E : others =>
TheHolder := (Issuer => CryptoTypes.NullIssuer,
SerialNumber => CertTypes.SerialNumberT'Last);
Success := False;
end GetHolder;
------------------------------------------------------------------
-- GetValidity
--
-- Description:
-- Attempts to extract the Certificate's Validity field, or
-- AttCertValidity field, depending on CertType.
-- If values are invalid, or there is a problem extracting
-- the values, then each value is set to 'First, and Success is
-- set to False.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetValidity (TheCert : in CertTypes.RawCertificateT;
CertType : in CommonTypes.Unsigned32T;
Validity : out ValidityT;
Success : out Boolean)
is
begin
if CertType = IDCertType then
declare
TheDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "Validity");
begin
ExtractValidity(TheDict, Validity, Success);
end;
else
declare
TheDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "AttCertValidity");
begin
ExtractValidity(TheDict, Validity, Success);
end;
end if;
exception
when E : others =>
Success := False;
Validity := (NotBefore => (Minute => 0,
Hour => 0,
Day => 1,
Month => 1,
Year => 1901),
NotAfter => (Minute => 0,
Hour => 0,
Day => 1,
Month => 1,
Year => 1901));
end GetValidity;
------------------------------------------------------------------
-- GetKeyInfo
--
-- Description:
-- Attempts to extract the Certificate's SubjectPublicKeyInfo
-- field.
-- If there is a problem extracting the values, then 'First values
-- are returned, and Success is set to False.
-- If the KeyLength field is not in range, then Success is set
-- to False.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetKeyInfo (TheCert : in CertTypes.RawCertificateT;
TheKey : out PublicKeyInfoT;
Success : out Boolean)
is
KeyDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "SubjectPublicKeyInfo");
begin
TheKey.AlgorithmID := CryptoTypes.AlgorithmT'Value(
MsgProc.GetStringByKey(
Dic => KeyDict,
Key => "AlgoRithmID"));
TheKey.KeyLength := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => KeyDict,
Key => "KeyLength"));
TheKey.KeyID := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => KeyDict,
Key => "KeyID"));
if TheKey.KeyLength <= 128 then
Success := True;
else
Success := False;
TheKey.KeyLength := CommonTypes.Unsigned32T'First;
end if;
exception
when E : others =>
Success := False;
TheKey := (AlgorithmID => CryptoTypes.AlgorithmT'First,
KeyLength => CommonTypes.Unsigned32T'First,
KeyID => CommonTypes.Unsigned32T'First);
end GetKeyInfo;
------------------------------------------------------------------
-- GetPrivilege
--
-- Description:
-- Attempts to extract the Certificate's Privilege
-- field.
-- If there is a problem extracting the values, then 'First values
-- are returned, and Success is set to False.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetPrivilege(TheCert : in CertTypes.RawCertificateT;
ThePriv : out PrivilegeT;
Success : out Boolean)
is
PrivDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "Privilege");
begin
ThePriv.Role := RoleFrom(
RoleValues'Value(
MsgProc.GetStringByKey(
Dic => PrivDict,
Key => "Role")));
ThePriv.Class := ClassFrom(
ClassValues'Value(
MsgProc.GetStringByKey(
Dic => PrivDict,
Key => "Class")));
Success := True;
exception
when E : others =>
ThePriv := (PrivTypes.PrivilegeT'First,
PrivTypes.ClassT'First);
Success := False;
end GetPrivilege;
------------------------------------------------------------------
-- GetPrivilege
--
-- Description:
-- Attempts to extract the Certificate's Fingerprint Template
-- field.
-- If there is a problem extracting the values, then 'First values
-- are returned, and Success is set to False.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure GetTemplate(TheCert : in CertTypes.RawCertificateT;
Template : out IandATypes.TemplateT;
Success : out Boolean)
is
TemplateDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(TheCert),
Key => "Template");
begin
Template.ID := Ada.Strings.Fixed.Overwrite(
IandATypes.TemplateIDT'(others => ' '),
1,
MsgProc.GetStringByKey(
Dic => TemplateDict,
Key => "TemplateID"));
Template.Length := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
Dic => TemplateDict,
Key => "TemplateLength"));
Template.RequiredMaxFAR := IandATypes.FarT'Value(
MsgProc.GetStringByKey(
Dic => TemplateDict,
Key => "RequiredMaxFAR"));
Success := True;
exception
when E : others =>
Template := IandATypes.NullTemplate;
Success := False;
end GetTemplate;
------------------------------------------------------------------
-- OverwriteDigestID
--
-- Description:
-- Overwrites the DigestID in the Crypto string with NewID.
-- If there is a problem, then the Crypto string remains
-- unchanged.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure OverwriteDigestID(Crypto : in out String;
NewID : in CommonTypes.Unsigned32T)
is
LocalCrypto : String := Crypto;
DigestIDKeyEnd,
DigestIDStart,
DigestIDEnd : Natural := 0;
begin
-- Delete the old DigestID
DigestIDKeyEnd := Ada.Strings.Fixed.Index(LocalCrypto,
"DigestID") +
9;
for i in DigestIDKeyEnd..LocalCrypto'Length loop
if LocalCrypto(i) = ''' then
if DigestIDStart = 0 then
DigestIDStart := i + 1;
else
DigestIDEnd := i - 1;
exit;
end if;
end if;
end loop;
Ada.Strings.Fixed.Delete(LocalCrypto,
DigestIDStart,
DigestIDEnd);
-- and insert 'NewID'
Ada.Strings.Fixed.Insert(LocalCrypto,
DigestIDStart,
MsgProc.StringFrom32(NewID));
Crypto := LocalCrypto;
exception
when E : others =>
Null;
end OverwriteDigestID;
------------------------------------------------------------------
-- ExtractCryptoControlData
--
-- Description:
-- Attempts to extract the Certificate's Fictional Crypto Control
-- Data, and overwrites the DigestID with 0.
-- If there is a problem extracting the values, then null
-- values are returned.
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure ExtractCryptoControlData(ThePrivCert : CertTypes.RawCertificateT)
is
CryptoDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(ThePrivCert),
Key => "CryptoControlData");
begin
CryptoControlData := Ada.Strings.Fixed.Overwrite(
NullCryptoControl,
1,
String(CryptoDict));
OverwriteDigestID(CryptoControlData, 0);
exception
when E : others =>
CryptoControlData := NullCryptoControl;
end ExtractCryptoControlData;
------------------------------------------------------------------
-- Exported Subprograms
------------------------------------------------------------------
------------------------------------------------------------------
-- ExtractIDCertData
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure ExtractIDCertData(
RawIDCert : in CertTypes.RawCertificateT;
IDCert : out IDCertDataT;
ExtractSuccess : out Boolean
)
is
LengthOK,
TypeOK,
SerialOK,
AlgOK,
IssuerOK,
ValidityOK,
SubjectOK,
KeyOK : Boolean;
TheCertType : CommonTypes.Unsigned32T;
TheSerialNumber : CommonTypes.Unsigned32T;
TheSigAlgId : CryptoTypes.AlgorithmT;
TheIssuer : CryptoTypes.IssuerT;
TheValidity : ValidityT;
TheSubject : CryptoTypes.IssuerT;
TheSubjectPublicKey : PublicKeyInfoT;
begin
CheckCertLength(RawIDCert, LengthOK);
GetCertType (RawIDCert, IDCertType, TheCertType, TypeOK);
GetSerialNumber (RawIDCert, IDCertType, TheSerialNumber, SerialOK);
GetSigAlgID (RawIDCert, TheSigAlgID, AlgOK);
GetName (RawIDCert, IDCertType, False, TheIssuer, IssuerOK);
GetValidity (RawIDCert, IDCertType, TheValidity, ValidityOK);
GetName (RawIDCert, IDCertType, True, TheSubject, SubjectOK);
GetKeyInfo (RawIDCert, TheSubjectPublicKey, KeyOK);
IDCert := (CertType => TheCertType,
SerialNumber => TheSerialNumber,
SigAlgId => TheSigAlgID,
Issuer => TheIssuer,
Validity => TheValidity,
Subject => TheSubject,
SubjectPublicKeyInfo => TheSubjectPublicKey);
ExtractSuccess := LengthOK and
TypeOK and
SerialOK and
AlgOK and
IssuerOK and
ValidityOK and
SubjectOK and
KeyOK;
end ExtractIDCertData;
------------------------------------------------------------------
-- ExtractPrivCertData
--
-- Description:
-- Takes the raw certificate data extracted from the user's token, and
-- converts into the correct (Priv) certificate structure.
--
------------------------------------------------------------------
procedure ExtractPrivCertData(
RawPrivCert : in CertTypes.RawCertificateT;
PrivCert : out PrivCertDataT;
ExtractSuccess : out Boolean
)
is
LengthOK,
TypeOK,
SerialOK,
AlgOK,
IssuerOK,
ValidityOK,
HolderOK,
PrivilegeOK : Boolean;
TheCertType : CommonTypes.Unsigned32T;
TheSerialNumber : CommonTypes.Unsigned32T;
TheSigAlgId : CryptoTypes.AlgorithmT;
TheIssuer : CryptoTypes.IssuerT;
TheValidity : ValidityT;
TheHolder : CertTypes.IDT;
ThePrivilege : PrivilegeT;
begin
CheckCertLength(RawPrivCert, LengthOK);
GetCertType (RawPrivCert, PrivCertType, TheCertType, TypeOK);
GetSerialNumber (RawPrivCert, PrivCertType, TheSerialNumber, SerialOK);
GetSigAlgID (RawPrivCert, TheSigAlgID, AlgOK);
GetName (RawPrivCert, PrivCertType, False, TheIssuer, IssuerOK);
GetValidity (RawPrivCert, PrivCertType, TheValidity, ValidityOK);
GetHolder (RawPrivCert, TheHolder, HolderOK);
GetPrivilege (RawPrivCert, ThePrivilege, PrivilegeOK);
PrivCert := (CertType => TheCertType,
SerialNumber => TheSerialNumber,
SigAlgId => TheSigAlgID,
Issuer => TheIssuer,
AttCertValidity => TheValidity,
Holder => TheHolder,
Privilege => ThePrivilege);
ExtractSuccess := LengthOK and
TypeOK and
SerialOK and
AlgOK and
IssuerOK and
ValidityOK and
HolderOK and
PrivilegeOK;
-- Now we need to extract the CryptoControl data, to insert
-- into the next created auth cert.
ExtractCryptoControlData(RawPrivCert);
end ExtractPrivCertData;
------------------------------------------------------------------
-- ExtractIACertData
--
-- Description:
-- Takes the raw certificate data extracted from the user's token, and
-- converts into the correct (I&A) certificate structure.
--
------------------------------------------------------------------
procedure ExtractIACertData(
RawIACert : in CertTypes.RawCertificateT;
IACert : out IACertDataT;
ExtractSuccess : out Boolean
)
is
LengthOK,
TypeOK,
SerialOK,
AlgOK,
IssuerOK,
ValidityOK,
HolderOK,
TemplateOK : Boolean;
TheCertType : CommonTypes.Unsigned32T;
TheSerialNumber : CommonTypes.Unsigned32T;
TheSigAlgId : CryptoTypes.AlgorithmT;
TheIssuer : CryptoTypes.IssuerT;
TheValidity : ValidityT;
TheHolder : CertTypes.IDT;
TheTemplate : IandATypes.TemplateT;
begin
CheckCertLength(RawIACert, LengthOK);
GetCertType (RawIACert, IACertType, TheCertType, TypeOK);
GetSerialNumber (RawIACert, IACertType, TheSerialNumber, SerialOK);
GetSigAlgID (RawIACert, TheSigAlgID, AlgOK);
GetName (RawIACert, IACertType, False, TheIssuer, IssuerOK);
GetValidity (RawIACert, IACertType, TheValidity, ValidityOK);
GetHolder (RawIACert, TheHolder, HolderOK);
GetTemplate (RawIACert, TheTemplate, TemplateOK);
IACert := (CertType => TheCertType,
SerialNumber => TheSerialNumber,
SigAlgId => TheSigAlgID,
Issuer => TheIssuer,
AttCertValidity => TheValidity,
Holder => TheHolder,
Template => TheTemplate);
ExtractSuccess := LengthOK and
TypeOK and
SerialOK and
AlgOK and
IssuerOK and
ValidityOK and
HolderOK and
TemplateOK;
end ExtractIACertData;
------------------------------------------------------------------
-- ExtractAuthCertData
--
-- Description:
-- Takes the raw certificate data extracted from the user's token, and
-- converts into the correct (Auth) certificate structure.
--
------------------------------------------------------------------
procedure ExtractAuthCertData(
RawAuthCert : in CertTypes.RawCertificateT;
AuthCert : out AuthCertDataT;
ExtractSuccess : out Boolean
)
is
LengthOK,
TypeOK,
SerialOK,
AlgOK,
IssuerOK,
ValidityOK,
HolderOK,
PrivilegeOK : Boolean;
TheCertType : CommonTypes.Unsigned32T;
TheSerialNumber : CommonTypes.Unsigned32T;
TheSigAlgId : CryptoTypes.AlgorithmT;
TheIssuer : CryptoTypes.IssuerT;
TheValidity : ValidityT;
TheHolder : CertTypes.IDT;
ThePrivilege : PrivilegeT;
begin
CheckCertLength(RawAuthCert, LengthOK);
GetCertType (RawAuthCert, AuthCertType, TheCertType, TypeOK);
GetSerialNumber (RawAuthCert, AuthCertType, TheSerialNumber, SerialOK);
GetSigAlgID (RawAuthCert, TheSigAlgID, AlgOK);
GetName (RawAuthCert, AuthCertType, False, TheIssuer, IssuerOK);
GetValidity (RawAuthCert, AuthCertType, TheValidity, ValidityOK);
GetHolder (RawAuthCert, TheHolder, HolderOK);
GetPrivilege (RawAuthCert, ThePrivilege, PrivilegeOK);
AuthCert := (CertType => TheCertType,
SerialNumber => TheSerialNumber,
SigAlgId => TheSigAlgID,
Issuer => TheIssuer,
AttCertValidity => TheValidity,
Holder => TheHolder,
Privilege => ThePrivilege);
ExtractSuccess := LengthOK and
TypeOK and
SerialOK and
AlgOK and
IssuerOK and
ValidityOK and
HolderOK and
PrivilegeOK;
end ExtractAuthCertData;
------------------------------------------------------------------
-- ObtainRawData
--
-- Implementation Notes:
-- Raw Data is determined by removing the SignatureData from
-- the CertData dictionary.
-- The signature may be anywhere in the certificate(!), so need
-- to find the signature, and delete this along with its key.
-- If the SignatureData is not found, then return the whole certificate
-- (it may not have been signed).
--
------------------------------------------------------------------
procedure ObtainRawData(
RawCert : in CertTypes.RawCertificateT;
RawData : out CertTypes.RawDataT;
ObtainSuccess : out Boolean
)
is
-- Without enclosing braces...
SigDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(RawCert),
Key => "SignatureData");
SigDictStart,
SigKeyStart : Integer := 0;
CertData : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(RawCert),
Key => "CertDataT");
begin
SigDictStart := Ada.Strings.Fixed.Index(String(CertData),
String(SigDict));
SigKeyStart := Ada.Strings.Fixed.Index(String(CertData),
"'SignatureData'");
if SigKeyStart /= 0 and SigDictStart /= 0 then
Ada.Strings.Fixed.Delete(String(CertData),
-- From 'SignatureData': ...
SigKeyStart,
-- ... to the enclosing }
SigDictStart + SigDict'Length);
end if;
-- If signature data not found, return all of CertData
RawData.RawData := Ada.Strings.Fixed.Overwrite(
CertTypes.NullRawCertificate,
1,
String(CertData));
RawData.DataLength := Ada.Strings.Fixed.Trim(
RawData.RawData,
Ada.Strings.Right)'Length;
ObtainSuccess := True;
exception
when E : others =>
-- return whole certificate
ObtainSuccess := True;
RawData := (RawCert,
Ada.Strings.Fixed.Trim(
RawCert,
Ada.Strings.Right)'Length);
end ObtainRawData;
------------------------------------------------------------------
-- ObtainSignatureData
--
-- Implementation Notes:
-- None.
--
------------------------------------------------------------------
procedure ObtainSignatureData(
RawCert : in CertTypes.RawCertificateT;
SignatureData : out CertTypes.SignatureT;
ObtainSuccess : out Boolean
)
is
SigDict : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
Dic => MsgProc.DictionaryT(RawCert),
Key => "SignatureData");
begin
SignatureData := (SigData => (others => ' '),
SigLength => CertTypes.SigDataI'First);
if SigDict'Length /= 0 then
Ada.Strings.Fixed.Overwrite(SignatureData.SigData,
1,
String(SigDict));
if SigDict'Length <= CertTypes.SigDataI'Last then
SignatureData.SigLength := SigDict'Length;
else
SignatureData.SigLength := CertTypes.SigDataI'Last;
end if;
ObtainSuccess := True;
else
ObtainSuccess := False;
end if;
end ObtainSignatureData;
------------------------------------------------------------------
-- ConstructAuthCert
--
-- Implementation Notes:
-- Adds the fictional Crypto dictionary (copied from the Priv Cert)
--
------------------------------------------------------------------
procedure ConstructAuthCert(
AuthCert : in AuthCertDataT;
UnsignedRawAuthCert : out CertTypes.RawCertificateT
)
is
CertTypeString : String :=
"'CertType': '" &
MsgProc.StringFrom32(AuthCert.CertType) &
"', ";
SerialNoString : String :=
"'SerialNumber': '" &
MsgProc.StringFrom32(AuthCert.SerialNumber) &
"', ";
SigAlgIDString : String :=
"'SigAlgID': '" &
CryptoTypes.AlgorithmT'Image(AuthCert.SigAlgID) &
"', ";
IssuerString : String :=
"'Issuer': {'Text': '" &
AuthCert.Issuer.Name(1..AuthCert.Issuer.NameLength) &
"', 'ID': '" &
MsgProc.StringFrom32(CommonTypes.Unsigned32T(AuthCert.Issuer.ID)) &
"', 'TextLength': '" &
MsgProc.StringFromInt(AuthCert.Issuer.NameLength) &
"'}, ";
ValidityString : String :=
"'AttCertValidity': {'NotBefore': {'Minute': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotBefore.Minute) &
"', 'Hour': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotBefore.Hour) &
"', 'Day': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotBefore.Day) &
"', 'Month': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotBefore.Month) &
"', 'Year': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotBefore.Year) &
"'}, 'NotAfter': {'Minute': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotAfter.Minute) &
"', 'Hour': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotAfter.Hour) &
"', 'Day': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotAfter.Day) &
"', 'Month': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotAfter.Month) &
"', 'Year': '" &
MsgProc.StringFrom32(
AuthCert.AttCertValidity.NotAfter.Year) &
"'}}, ";
HolderString : String :=
"'Holder': {'SerialNumber': '" &
MsgProc.StringFrom32(CommonTypes.Unsigned32T(
AuthCert.Holder.SerialNumber)) &
"', 'Issuer': {'Text': '" &
AuthCert.Holder.Issuer.Name(
1..AuthCert.Holder.Issuer.NameLength) &
"', 'ID': '" &
MsgProc.StringFrom32(CommonTypes.Unsigned32T(
AuthCert.Holder.Issuer.ID)) &
"', 'TextLength': '" &
MsgProc.StringFromInt(AuthCert.Holder.Issuer.NameLength) &
"'}}, ";
PriviString : String :=
"'Privilege': {'Pad': '??????????', 'Role': '" &
MsgProc.StringFrom32(CommonTypes.Unsigned32T(
RoleTo(AuthCert.Privilege.Role))) &
"', 'Class': '" &
MsgProc.StringFrom32(CommonTypes.Unsigned32T(
ClassTo(AuthCert.Privilege.Class))) &
"'}, ";
CryptoString : String :=
"'CryptoControlData': {" &
Ada.Strings.Fixed.Trim(CryptoControlData, Ada.Strings.
Both) &
"}, ";
SigString : String :=
"'SignatureData': {}";
TheAuthData : String :=
CertTypeString &
SerialNoString &
SigAlgIDString &
IssuerSTring &
ValidityString &
HolderString &
PriviString &
CryptoString &
SigString;
-- Include braces in length, so add 2
TheAuthLength : String :=
"'CertLength': '" &
MsgProc.StringFromInt(TheAuthData'Length + 2) &
"', ";
TheAuthString : String :=
TheAuthLength &
"'CertDataT': {" &
TheAuthData &
"}";
begin
UnsignedRawAuthCert := Ada.Strings.Fixed.Overwrite(
CertTypes.NullRawCertificate,
1,
TheAuthString);
end ConstructAuthCert;
------------------------------------------------------------------
-- AddAuthSignature
--
-- Implementation Notes:
-- Adds the SignatureData to the empty dictionary created in
-- ConstructAuthCert.
-- Digest ID in SignatureData is the 'correct' ID - i.e. the ID created
-- from digesting the unsigned cert. This needs to overwrite the
-- DigestID in the fictional Crypto dictionary.
--
------------------------------------------------------------------
procedure AddAuthSignature(
UnsignedRawAuthCert : in CertTypes.RawCertificateT;
SignatureData : in CertTypes.SignatureT;
SignedRawAuthCert : out CertTypes.RawCertificateT)
is
NewID : CommonTypes.Unsigned32T;
SigDataString : String := SignatureData.SigData(
1..SignatureData.SigLength);
SigDictStart : Natural;
CertLengthKey : String := "'CertLength':";
LengthKeyStart : Natural;
LengthValStart,
LengthValEnd : Natural := 0;
begin
SignedRawAuthCert := UnsignedRawAuthCert;
-- Attempt to replace the old DigestID with the new one
begin
NewID := CommonTypes.Unsigned32T'Value(
MsgProc.GetStringByKey(
MsgProc.DictionaryT(SigDataString),
"DigestID"));
OverwriteDigestID(SignedRawAuthCert, NewID);
exception
when E : others =>
Null;
end;
-- Find and overwrite the blank signature
SigDictStart := Ada.Strings.Fixed.Index(SignedRawAuthCert, "{}");
if SigDictStart /= 0 then
Ada.Strings.Fixed.Insert(SignedRawAuthCert,
SigDictStart + 1,
SigDataString,
Ada.Strings.Right);
end if; -- else would only occur if UnsignedRawAuthCert is
-- not that contructed by ConstructAuthCert
-- Determine the new CertLength, and overwrite old one
declare
TheCertData : MsgProc.DictionaryT :=
MsgProc.GetDictionaryByKey(
MsgProc.DictionaryT(SignedRawAuthCert),
"CertDataT");
begin
LengthKeyStart := Ada.Strings.Fixed.Index(SignedRawAuthCert,
CertLengthKey);
for i in CertTypes.RawCertificateI range
LengthKeyStart + CertLengthKey'Length-1 .. CertTypes.RawCertificateI'Last loop
if SignedRawAuthCert(i) = ''' then
if LengthValStart = 0 then
LengthValStart := i + 1;
else
LengthValEnd := i - 1;
exit;
end if;
end if;
end loop;
-- Include braces in length, so add 2
Ada.Strings.Fixed.Replace_Slice(SignedRawAuthCert,
LengthValStart,
LengthValEnd,
MsgProc.StringFromInt(TheCertData'Length + 2),
Ada.Strings.Right);
end;
end AddAuthSignature;
end CertProc;
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