// Token: 0x06000245 RID: 581 RVA: 0x00009F60 File Offset: 0x00008160
public static bool IsValidSmtpAddress(string address, bool checkLength, out int domainStart, bool allowUTF8 = false)
{
if (string.IsNullOrEmpty(address))
{
domainStart = -1;
return(false);
}
if (checkLength && address.Length > 571 && (address.Length > 1860 || !MimeAddressParser.IsEncapsulatedX400Address(address)))
{
domainStart = -1;
return(false);
}
int num = 0;
MimeAddressParser.ValidationStage validationStage = MimeAddressParser.ValidationStage.BEGIN;
while (num < address.Length && validationStage != MimeAddressParser.ValidationStage.ERROR)
{
char c = address[num];
num++;
switch (validationStage)
{
case MimeAddressParser.ValidationStage.BEGIN:
if ((c < '\u0080' && MimeScan.IsAtom((byte)c)) || (c >= '\u0080' && allowUTF8))
{
validationStage = MimeAddressParser.ValidationStage.LOCAL;
continue;
}
if (c == '\\')
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_ESC;
continue;
}
if (c == '"')
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_DQS;
continue;
}
goto IL_1B6;
case MimeAddressParser.ValidationStage.LOCAL:
if (c == '@')
{
goto IL_182;
}
if (c == '.')
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_DOT;
continue;
}
break;
case MimeAddressParser.ValidationStage.LOCAL_DOT:
break;
case MimeAddressParser.ValidationStage.LOCAL_DQS:
if (c == '"')
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_DQS_END;
continue;
}
if (c == '\\')
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_DQS_ESC;
continue;
}
if ((c < '\u0080' && '\r' != c && '\n' != c && '\\' != c && '"' != c) || (c >= '\u0080' && allowUTF8))
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_DQS;
continue;
}
goto IL_1B6;
case MimeAddressParser.ValidationStage.LOCAL_ESC:
if (c < '\u0080' || (c >= '\u0080' && allowUTF8))
{
validationStage = MimeAddressParser.ValidationStage.LOCAL;
continue;
}
goto IL_1B6;
case MimeAddressParser.ValidationStage.LOCAL_DQS_ESC:
if (c < '\u0080' || (c >= '\u0080' && allowUTF8))
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_DQS;
continue;
}
goto IL_1B6;
case MimeAddressParser.ValidationStage.LOCAL_DQS_END:
if (c == '@')
{
goto IL_182;
}
goto IL_1B6;
case MimeAddressParser.ValidationStage.DOMAIN:
goto IL_182;
default:
goto IL_1B6;
}
if ((c < '\u0080' && MimeScan.IsAtom((byte)c)) || (c >= '\u0080' && allowUTF8))
{
validationStage = MimeAddressParser.ValidationStage.LOCAL;
continue;
}
if (c == '\\')
{
validationStage = MimeAddressParser.ValidationStage.LOCAL_ESC;
continue;
}
IL_1B6:
validationStage = MimeAddressParser.ValidationStage.ERROR;
continue;
IL_182:
if (checkLength && num - 1 > 315 && (num - 1 > 1604 || !MimeAddressParser.IsEncapsulatedX400Address(address)))
{
domainStart = -1;
return(false);
}
if (MimeAddressParser.IsValidDomain(address, num, checkLength, allowUTF8))
{
domainStart = num;
return(true);
}
goto IL_1B6;
}
domainStart = -1;
return(false);
}