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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* [email protected]. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
#if FEATURE_FULL_NET
using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using Microsoft.Scripting.Runtime;
using Microsoft.Scripting.Utils;
using IronPython.Runtime;
using IronPython.Runtime.Exceptions;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
[assembly: PythonModule("_ssl", typeof(IronPython.Modules.PythonSsl))]
namespace IronPython.Modules {
public static class PythonSsl {
public const string __doc__ = "Implementation module for SSL socket operations.";
public const int OPENSSL_VERSION_NUMBER = 9437184;
public static PythonTuple OPENSSL_VERSION_INFO = PythonTuple.MakeTuple(0, 0, 0, 0, 0);
public const string OPENSSL_VERSION = "OpenSSL 0.0.0 (.NET SSL)";
[SpecialName]
public static void PerformModuleReload(PythonContext/*!*/ context, PythonDictionary/*!*/ dict) {
var socket = context.GetBuiltinModule("socket");
var socketError = PythonSocket.GetSocketError(context, socket.__dict__);
context.EnsureModuleException("SSLError", socketError, dict, "SSLError", "ssl");
}
#region Stubs for RAND functions
// The RAND_ functions are effectively no-ops, as the BCL draws on system sources
// for cryptographically-strong randomness and doesn't need (or accept) user input
public static void RAND_add(object buf, double entropy) {
if (buf == null) {
throw PythonOps.TypeError("must be string or read-only buffer, not None");
} else if (!(buf is string) && !(buf is PythonBuffer)) {
throw PythonOps.TypeError("must be string or read-only buffer, not {0}", PythonOps.GetPythonTypeName(buf));
}
}
public static void RAND_egd([NotNull]string source) {
}
public static int RAND_status() {
return 1; // always ready
}
#endregion
public static PythonType SSLType = DynamicHelpers.GetPythonTypeFromType(typeof(PythonSocket.ssl));
public static PythonSocket.ssl sslwrap(
CodeContext context,
PythonSocket.socket socket,
bool server_side,
[DefaultParameterValue(null)] string keyfile,
[DefaultParameterValue(null)] string certfile,
[DefaultParameterValue(PythonSsl.CERT_NONE)]int certs_mode,
[DefaultParameterValue(-1)]int protocol,
[DefaultParameterValue(null)]string cacertsfile,
[DefaultParameterValue(null)]object ciphers) {
return new PythonSocket.ssl(
context,
socket,
server_side,
keyfile,
certfile,
certs_mode,
protocol,
cacertsfile
);
}
internal static PythonType SSLError(CodeContext/*!*/ context) {
return (PythonType)PythonContext.GetContext(context).GetModuleState("SSLError");
}
public static PythonDictionary _test_decode_cert(CodeContext context, string filename, [DefaultParameterValue(false)]bool complete) {
var cert = ReadCertificate(context, filename);
return CertificateToPython(context, cert, complete);
}
internal static PythonDictionary CertificateToPython(CodeContext context, X509Certificate cert, bool complete) {
var dict = new CommonDictionaryStorage();
dict.AddNoLock("notAfter", ToPythonDateFormat(cert.GetExpirationDateString()));
dict.AddNoLock("subject", IssuerToPython(context, cert.Subject));
if (complete) {
dict.AddNoLock("notBefore", ToPythonDateFormat(cert.GetEffectiveDateString()));
dict.AddNoLock("serialNumber", SerialNumberToPython(cert));
dict.AddNoLock("version", cert.GetCertHashString());
dict.AddNoLock("issuer", IssuerToPython(context, cert.Issuer));
AddSubjectAltNames(dict, new X509Certificate2(cert));
}
return new PythonDictionary(dict);
}
private static void AddSubjectAltNames(CommonDictionaryStorage dict, X509Certificate2 cert2) {
foreach (var extension in cert2.Extensions) {
if (extension.Oid.Value != "2.5.29.17") { // Subject Alternative Name
continue;
}
var altNames = new List<object>();
var sr = new StringReader(extension.Format(true));
string line;
while (null != (line = sr.ReadLine())) {
line = line.Trim();
var keyValue = line.Split('=');
if (keyValue[0] == "DNS Name" && keyValue.Length == 2) {
altNames.Add(PythonTuple.MakeTuple("DNS", keyValue[1]));
}
}
dict.AddNoLock("subjectAltName", PythonTuple.MakeTuple(altNames.ToArray()));
break;
}
}
private static string ToPythonDateFormat(string date) {
return DateTime.Parse(date).ToUniversalTime().ToString("MMM d HH:mm:ss yyyy") + " GMT";
}
private static string SerialNumberToPython(X509Certificate cert) {
var res = cert.GetSerialNumberString();
for (int i = 0; i < res.Length; i++) {
if (res[i] != '0') {
return res.Substring(i);
}
}
return res;
}
// yields parts out of issuer or subject string
// Respects quoted comma e.g: CN=*.c.ssl.fastly.net, O="Fastly, Inc.", L=San Francisco, S=California, C=US
// Quote characters are removed
private static IEnumerable<string> IssuerParts(string issuer) {
var inQuote = false;
var token = new StringBuilder();
foreach (var c in issuer) {
if (inQuote) {
if (c == '"') {
inQuote = false;
} else {
token.Append(c);
}
} else {
if (c == '"') {
inQuote = true;
} else if (c == ',') {
yield return token.ToString().Trim();
token.Length = 0;
} else {
token.Append(c);
}
}
}
}
private static PythonTuple IssuerToPython(CodeContext context, string issuer) {
var collector = new List<object>();
foreach (var part in IssuerParts(issuer)) {
var field = IssuerFieldToPython(context, part);
if (field != null) {
collector.Add(field);
}
}
return PythonTuple.MakeTuple(collector.ToArray());
}
private static PythonTuple IssuerFieldToPython(CodeContext context, string p) {
if (String.Compare(p, 0, "CN=", 0, 3) == 0) {
return PythonTuple.MakeTuple("commonName", p.Substring(3));
} else if (String.Compare(p, 0, "OU=", 0, 3) == 0) {
return PythonTuple.MakeTuple("organizationalUnitName", p.Substring(3));
} else if (String.Compare(p, 0, "O=", 0, 2) == 0) {
return PythonTuple.MakeTuple("organizationName", p.Substring(2));
} else if (String.Compare(p, 0, "L=", 0, 2) == 0) {
return PythonTuple.MakeTuple("localityName", p.Substring(2));
} else if (String.Compare(p, 0, "S=", 0, 2) == 0) {
return PythonTuple.MakeTuple("stateOrProvinceName", p.Substring(2));
} else if (String.Compare(p, 0, "C=", 0, 2) == 0) {
return PythonTuple.MakeTuple("countryName", p.Substring(2));
} else if (String.Compare(p, 0, "E=", 0, 2) == 0) {
return PythonTuple.MakeTuple("email", p.Substring(2));
}
// Ignore unknown fields
return null;
}
internal static X509Certificate2 ReadCertificate(CodeContext context, string filename) {
string[] lines;
try {
lines = File.ReadAllLines(filename);
} catch (IOException) {
throw PythonExceptions.CreateThrowable(SSLError(context), "Can't open file ", filename);
}
X509Certificate2 cert = null;
RSACryptoServiceProvider key = null;
try {
for (int i = 0; i < lines.Length; i++) {
if (lines[i] == "-----BEGIN CERTIFICATE-----") {
var certStr = ReadToEnd(lines, ref i, "-----END CERTIFICATE-----");
try {
cert = new X509Certificate2(Convert.FromBase64String(certStr.ToString()));
} catch (Exception e) {
throw ErrorDecoding(context, filename, e);
}
} else if (lines[i] == "-----BEGIN RSA PRIVATE KEY-----") {
var keyStr = ReadToEnd(lines, ref i, "-----END RSA PRIVATE KEY-----");
try {
var keyBytes = Convert.FromBase64String(keyStr.ToString());
key = ParsePkcs1DerEncodedPrivateKey(context, filename, keyBytes);
} catch (Exception e) {
throw ErrorDecoding(context, filename, e);
}
}
}
} catch (InvalidOperationException e) {
throw ErrorDecoding(context, filename, e.Message);
}
if (cert != null) {
if (key != null) {
try {
cert.PrivateKey = key;
} catch(CryptographicException e) {
throw ErrorDecoding(context, filename, "cert and private key are incompatible", e);
}
}
return cert;
}
throw ErrorDecoding(context, filename, "certificate not found");
}
#region Private Key Parsing
const int ClassOffset = 6;
const int ClassMask = 0xc0;
const int ClassUniversal = 0x00 << ClassOffset;
const int ClassApplication = 0x01 << ClassOffset;
const int ClassContextSpecific = 0x02 << ClassOffset;
const int ClassPrivate = 0x03 << ClassOffset;
const int NumberMask = 0x1f;
const int UnivesalSequence = 0x10;
const int UniversalInteger = 0x02;
const int UniversalOctetString = 0x04;
private static RSACryptoServiceProvider ParsePkcs1DerEncodedPrivateKey(CodeContext context, string filename, byte[] x) {
// http://tools.ietf.org/html/rfc3447#appendix-A.1.2
// RSAPrivateKey ::= SEQUENCE {
// version Version,
// modulus INTEGER, -- n
// publicExponent INTEGER, -- e
// privateExponent INTEGER, -- d
// prime1 INTEGER, -- p
// prime2 INTEGER, -- q
// exponent1 INTEGER, -- d mod (p-1)
// exponent2 INTEGER, -- d mod (q-1)
// coefficient INTEGER, -- (inverse of q) mod p
// otherPrimeInfos OtherPrimeInfos OPTIONAL
// }
// read header for sequence
if ((x[0] & ClassMask) != ClassUniversal) {
throw ErrorDecoding(context, filename, "failed to find universal class");
} else if ((x[0] & NumberMask) != UnivesalSequence) {
throw ErrorDecoding(context, filename, "failed to read sequence header");
}
// read length of sequence
int offset = 1;
ReadLength(x, ref offset);
// read version
int version = ReadUnivesalInt(x, ref offset);
if (version != 0) {
// unsupported version
throw new InvalidOperationException(String.Format("bad vesion: {0}", version));
}
// read in parameters and initialize provider
RSACryptoServiceProvider provider = new RSACryptoServiceProvider();
RSAParameters parameters = new RSAParameters();
parameters.Modulus = ReadUnivesalIntAsBytes(x, ref offset);
parameters.Exponent = ReadUnivesalIntAsBytes(x, ref offset);
parameters.D = ReadUnivesalIntAsBytes(x, ref offset);
parameters.P = ReadUnivesalIntAsBytes(x, ref offset);
parameters.Q = ReadUnivesalIntAsBytes(x, ref offset);
parameters.DP = ReadUnivesalIntAsBytes(x, ref offset);
parameters.DQ = ReadUnivesalIntAsBytes(x, ref offset);
parameters.InverseQ = ReadUnivesalIntAsBytes(x, ref offset);
provider.ImportParameters(parameters);
return provider;
}
private static byte[] ReadUnivesalIntAsBytes(byte[] x, ref int offset) {
ReadIntType(x, ref offset);
int bytes = ReadLength(x, ref offset);
// we need to remove any leading 0 bytes which aren't part of a number. Including
// them causes our parsing to differ from certification parsing.
while (x[offset] == 0) {
bytes--;
offset++;
}
byte[] res = new byte[bytes];
for (int i = 0; i < res.Length; i++) {
res[i] = x[offset++];
}
return res;
}
private static void ReadIntType(byte[] x, ref int offset) {
int versionType = x[offset++];
if (versionType != UniversalInteger) {
throw new InvalidOperationException(String.Format("expected version, fonud {0}", versionType));
}
}
private static int ReadUnivesalInt(byte[] x, ref int offset) {
ReadIntType(x, ref offset);
return ReadInt(x, ref offset);
}
private static int ReadLength(byte[] x, ref int offset) {
int bytes = x[offset++];
if ((bytes & 0x80) == 0) {
return bytes;
}
return ReadInt(x, ref offset, bytes & ~0x80);
}
private static int ReadInt(byte[] x, ref int offset, int bytes) {
if (bytes + offset > x.Length) {
throw new InvalidOperationException();
}
int res = 0;
for (int i = 0; i < bytes; i++) {
res = res << 8 | x[offset++];
}
return res;
}
/// <summary>
/// BER encoding of an integer value is the number of bytes
/// required to represent the integer followed by the bytes
/// </summary>
private static int ReadInt(byte[] x, ref int offset) {
int bytes = x[offset++];
return ReadInt(x, ref offset, bytes);
}
private static string ReadToEnd(string[] lines, ref int start, string end) {
StringBuilder key = new StringBuilder();
for (start++; start < lines.Length; start++) {
if (lines[start] == end) {
return key.ToString();
}
key.Append(lines[start]);
}
return null;
}
#endregion
private static Exception ErrorDecoding(CodeContext context, params object[] args) {
return PythonExceptions.CreateThrowable(SSLError(context), ArrayUtils.Insert("Error decoding PEM-encoded file ", args));
}
public const int CERT_NONE = 0;
public const int CERT_OPTIONAL = 1;
public const int CERT_REQUIRED = 2;
public const int PROTOCOL_SSLv2 = 0;
public const int PROTOCOL_SSLv3 = 1;
public const int PROTOCOL_SSLv23 = 2;
public const int PROTOCOL_TLSv1 = 3;
#region Exported constants
public const int SSL_ERROR_SSL = 1;
public const int SSL_ERROR_WANT_READ = 2;
public const int SSL_ERROR_WANT_WRITE = 3;
public const int SSL_ERROR_WANT_X509_LOOKUP = 4;
public const int SSL_ERROR_SYSCALL = 5;
public const int SSL_ERROR_ZERO_RETURN = 6;
public const int SSL_ERROR_WANT_CONNECT = 7;
public const int SSL_ERROR_EOF = 8;
public const int SSL_ERROR_INVALID_ERROR_CODE = 9;
#endregion
}
}
#endif