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Question:
Archived Forum PostQuestion:
I have created a couple of methods in VB6, consider:
Dim keyPEMstr as String Dim KeyPathName as String Dim errDesc as String
KeyPathName = "anyfile.key" ' a valid .key file keyPassword = "thePassw" ' a valid password for this .key file
Let keyPEMstr = get_keyPEMstrFromKEYfile(KeyPathName, keyPassword, errDesc) ' up to here there is no problem I get the string I want: a string with the PEM.
' by the other hand if I try:
**Let KEYstr = Encode64(StringArrayLoad(KeyPathName, "AbreLLaveCHILKAT"), False) ' converting to base64 the string representing the .key file
Let keyPEMstr = get_keyPEMstr(KEYstr, keyPassword, errDesc)**
' I get problems at the LoadPkcs8Encrypted method of the keyPEMstr function
'
' WHAT IS HPPENING IN THE SECOND CASE ?
' HOW CAN I GET IT WORKING?
' I am using DllDate: Aug 15 2013, ChilkatVersion: 9.4.1.42
'
'
Best Regards.
Art.
the next functions are used:
Public Function get_keyPEMstr(ByVal base64_KEYstr As String, ByVal keyPassword As String, _ Optional ByRef errDescripcion As String) As String
' by Arturo González Rivera, http://www.gorsa.net.mx
Dim privKey As privateKey 'chilkatcert.dll Dim rsa As ChilkatRsa 'chilkatrsa.dll Dim privKeyXml As String
Dim success As Long
Let errDescripcion = ""
Let get_keyPEMstr = ""
Set privKey = New privateKey
Let success = privKey.LoadPkcs8Encrypted(base64_KEYstr, keyPassword) ' ERROR!
If (success <> 1) Then Let errDescripcion = privKey.LastErrorText Set privKey = Nothing Exit Function End If
Let get_keyPEMstr = privKey.GetRsaPem ' en base64
Set privKey = Nothing
End Function '----------- Public Function get_keyPEMstrFromKEYfile(ByVal PathFileNameKey As String, ByVal keyPassword As String, _ Optional ByRef errDescripcion As String) As String
' by Arturo González Rivera, http://www.gorsa.net.mx
Dim privKey As privateKey 'chilkatcert.dll
Dim success As Long
Let errDescripcion = ""
Let get_keyPEMstrFromKEYfile = ""
Set privKey = New privateKey
Let success = privKey.LoadPkcs8EncryptedFile(PathFileNameKey, keyPassword) ' loadXML(privKeyXml) If (success <> 1) Then Let errDescripcion = privKey.LastErrorText Set privKey = Nothing Exit Function End If
Let get_keyPEMstrFromKEYfile = privKey.GetRsaPem ' en base64
Set privKey = Nothing End Function
' ----- USED EXTRA FUNCTIONS FOR THIS EXAMPLE ---------------
Public Function Encode64(sString As String, Optional ByVal incluyeCaracteresCRLF As Boolean = True) As String
Dim bTrans(63) As Byte, lPowers8(255) As Long, lPowers16(255) As Long, bOut() As Byte, bIn() As Byte
Dim lChar As Long, lTrip As Long, iPad As Integer, lLen As Long, lTemp As Long, lPos As Long, lOutSize As Long
Dim sStringOut As String
For lTemp = 0 To 63 'Fill the translation table.
Select Case lTemp
Case 0 To 25
bTrans(lTemp) = 65 + lTemp 'A - Z
Case 26 To 51
bTrans(lTemp) = 71 + lTemp 'a - z
Case 52 To 61
bTrans(lTemp) = lTemp - 4 '1 - 0
Case 62
bTrans(lTemp) = 43 'Chr(43) = "+"
Case 63
bTrans(lTemp) = 47 'Chr(47) = "/"
End Select
Next lTemp
For lTemp = 0 To 255 'Fill the 2^8 and 2^16 lookup tables.
lPowers8(lTemp) = lTemp * cl2Exp8
lPowers16(lTemp) = lTemp * cl2Exp16
Next lTemp
iPad = Len(sString) Mod 3 'See if the length is divisible by 3
If iPad Then 'If not, figure out the end pad and resize the input.
iPad = 3 - iPad
sString = sString & String(iPad, Chr(0))
End If
bIn = StrConv(sString, vbFromUnicode) 'Load the input string.
lLen = ((UBound(bIn) + 1) \ 3) * 4 'Length of resulting string.
lTemp = lLen \ 72 'Added space for vbCrLfs.
lOutSize = ((lTemp * 2) + lLen) - 1 'Calculate the size of the output buffer.
ReDim bOut(lOutSize) 'Make the output buffer.
lLen = 0 'Reusing this one, so reset it.
For lChar = LBound(bIn) To UBound(bIn) Step 3
lTrip = lPowers16(bIn(lChar)) + lPowers8(bIn(lChar + 1)) + bIn(lChar + 2) 'Combine the 3 bytes
lTemp = lTrip And clOneMask 'Mask for the first 6 bits
bOut(lPos) = bTrans(lTemp \ cl2Exp18) 'Shift it down to the low 6 bits and get the value
lTemp = lTrip And clTwoMask 'Mask for the second set.
bOut(lPos + 1) = bTrans(lTemp \ cl2Exp12) 'Shift it down and translate.
lTemp = lTrip And clThreeMask 'Mask for the third set.
bOut(lPos + 2) = bTrans(lTemp \ cl2Exp6) 'Shift it down and translate.
bOut(lPos + 3) = bTrans(lTrip And clFourMask) 'Mask for the low set.
If lLen = 68 Then 'Ready for a newline
bOut(lPos + 4) = 13 'Chr(13) = vbCr
bOut(lPos + 5) = 10 'Chr(10) = vbLf
lLen = 0 'Reset the counter
lPos = lPos + 6
Else
lLen = lLen + 4
lPos = lPos + 4
End If
Next lChar
If bOut(lOutSize) = 10 Then lOutSize = lOutSize - 2 'Shift the padding chars down if it ends with CrLf.
If iPad = 1 Then 'Add the padding chars if any.
bOut(lOutSize) = 61 'Chr(61) = "="
ElseIf iPad = 2 Then
bOut(lOutSize) = 61
bOut(lOutSize - 1) = 61
End If
If incluyeCaracteresCRLF Then
sStringOut = StrConv(bOut, vbUnicode) 'Convert back to a string and return it.
Else
sStringOut = Replace(StrConv(bOut, vbUnicode), vbCr, vbNullString) 'Convert back to a string and return it.
sStringOut = Replace(sStringOut, vbLf, vbNullString) 'either order.
End If
Encode64 = sStringOut
End Function
Public Function StringArrayLoad(FileName As String, Optional ByVal RutinaDeProcedencia As String = "") As String Dim f As Integer Dim strCadena As String
On Error GoTo Ver
f = FreeFile
Open FileName For Binary Access Read As #f Let strCadena = Space(LOF(f)) Get #f, , strCadena Let StringArrayLoad = strCadena Close #f Exit Function Ver: MsgBox "Nº de error: " & Err.Number & " | " & Err.Description, vbCritical, "Control de errores [" & RutinaDeProcedencia & "]" Err.Clear Close #f End Function