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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
#if FEATURE_FULL_NET
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
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 {
internal class Asn1Object {
public Asn1Object(string shortName, string longName, int nid, byte[] oid) {
ShortName = shortName;
LongName = longName;
NID = nid;
OID = oid;
OIDString = string.Join(".", OID);
}
public string ShortName {
get; set;
}
public string LongName {
get; set;
}
public int NID {
get; set;
}
public byte[] OID {
get; set;
}
public string OIDString {
get;
}
public PythonTuple ToTuple() {
return PythonTuple.MakeTuple(NID, ShortName, LongName, OIDString);
}
}
public static class PythonSsl {
public const string __doc__ = "Implementation module for SSL socket operations. See the socket module\nfor documentation.";
public const int OPENSSL_VERSION_NUMBER = 9437184;
public static readonly PythonTuple OPENSSL_VERSION_INFO = PythonTuple.MakeTuple(0, 0, 0, 0, 0);
public static readonly object _OPENSSL_API_VERSION = OPENSSL_VERSION_INFO;
public const string OPENSSL_VERSION = "OpenSSL 0.0.0 (.NET SSL)";
private static List<Asn1Object> _asn1Objects = new List<Asn1Object>();
static PythonSsl() {
_asn1Objects.AddRange(new Asn1Object[] {
new Asn1Object("serverAuth", "TLS Web Server Authentication", 129, new byte[] { 1, 3, 6, 1 ,5, 5, 7, 3, 1 }),
new Asn1Object("clientAuth", "TLS Web Client Authentication", 130, new byte[] { 1, 3, 6, 1 ,5, 5, 7, 3, 2 }),
});
}
[SpecialName]
public static void PerformModuleReload(PythonContext/*!*/ context, PythonDictionary/*!*/ dict) {
var sslError = context.EnsureModuleException("SSLError", PythonSocket.error, dict, "SSLError", "ssl");
context.EnsureModuleException("SSLZeroReturnError", sslError, dict, "SSLZeroReturnError", "ssl");
context.EnsureModuleException("SSLWantWriteError", sslError, dict, "SSLWantWriteError", "ssl");
context.EnsureModuleException("SSLSyscallError", sslError, dict, "SSLSyscallError", "ssl");
context.EnsureModuleException("SSLEOFError", sslError, dict, "SSLEOFError", "ssl");
context.EnsureModuleException("SSLWantReadError", sslError, dict, "SSLWantReadError", "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 is string) && !(buf is IBufferProtocol)) {
throw PythonOps.TypeError($"'{DynamicHelpers.GetPythonType(buf).Name}' does not support the buffer interface");
}
}
public static int RAND_status() => 1; // always ready
public static object RAND_bytes(int num) => PythonNT.urandom(num);
public static object RAND_pseudo_bytes(int num) => PythonTuple.MakeTuple(PythonNT.urandom(num), true);
#endregion
#region SSLContext
[PythonType]
public class _SSLContext {
private X509Certificate2Collection _cert_store = new X509Certificate2Collection();
private string _cafile;
private int _verify_mode = SSL_VERIFY_NONE;
public _SSLContext(CodeContext context, [DefaultParameterValue(PROTOCOL_SSLv23)] int protocol) {
if (protocol != PROTOCOL_SSLv2 && protocol != PROTOCOL_SSLv23 && protocol != PROTOCOL_SSLv3 &&
protocol != PROTOCOL_TLSv1 && protocol != PROTOCOL_TLSv1_1 && protocol != PROTOCOL_TLSv1_2) {
throw PythonOps.ValueError("invalid protocol version");
}
this.protocol = protocol;
if (protocol != PROTOCOL_SSLv2)
options |= OP_NO_SSLv2;
if (protocol != PROTOCOL_SSLv3)
options |= OP_NO_SSLv3;
verify_mode = SSL_VERIFY_NONE;
check_hostname = false;
}
public void set_ciphers(CodeContext context, string ciphers) {
}
public int options {
get; set;
}
public int verify_mode {
get {
return _verify_mode;
}
set {
if(_verify_mode != CERT_NONE && _verify_mode != CERT_OPTIONAL && _verify_mode != CERT_REQUIRED) {
throw PythonOps.ValueError("invalid value for verify_mode");
}
_verify_mode = value;
}
}
public int protocol {
get; set;
}
public bool check_hostname {
get; set;
}
public void set_default_verify_paths(CodeContext context) {
}
public void load_cert_chain(string certfile, [DefaultParameterValue(null)] string keyfile, [DefaultParameterValue(null)] object password) {
}
public void load_verify_locations(CodeContext context, [DefaultParameterValue(null)] string cafile, [DefaultParameterValue(null)] string capath, [DefaultParameterValue(null)] object cadata) {
if(cafile == null && capath == null && cadata == null) {
throw PythonOps.TypeError("cafile, capath and cadata cannot be all omitted");
}
if(cafile != null) {
_cert_store.Add(ReadCertificate(context, cafile));
_cafile = cafile;
}
if(capath != null) {
}
if(cadata != null) {
var cabuf = cadata as IBufferProtocol;
if (cabuf != null) {
int pos = 0;
byte[] contents;
using (IPythonBuffer buf = cabuf.GetBuffer()) {
contents = buf.AsReadOnlySpan().ToArray();
}
while (pos < contents.Length) {
byte[] curr = new byte[contents.Length - pos];
Array.Copy(contents, pos, curr, 0, contents.Length - pos);
var cert = new X509Certificate2(curr);
_cert_store.Add(cert);
pos += cert.GetRawCertData().Length;
}
}
}
}
public object _wrap_socket(CodeContext context, [DefaultParameterValue(null)] PythonSocket.socket sock, [DefaultParameterValue(false)] bool server_side, [DefaultParameterValue(null)] string server_hostname, [DefaultParameterValue(null)] object ssl_sock) {
return new PythonSocket.ssl(context, sock, server_side, null, _cafile, verify_mode, protocol | options, null, _cert_store) { _serverHostName = server_hostname };
}
}
#endregion
public static PythonType SSLType = DynamicHelpers.GetPythonTypeFromType(typeof(PythonSocket.ssl));
public static PythonSocket.ssl sslwrap(
CodeContext context,
PythonSocket.socket socket,
bool server_side,
string keyfile=null,
string certfile=null,
int certs_mode=PythonSsl.CERT_NONE,
int protocol= (PythonSsl.PROTOCOL_SSLv23 | PythonSsl.OP_NO_SSLv2 | PythonSsl.OP_NO_SSLv3),
string cacertsfile=null,
object ciphers=null) {
return new PythonSocket.ssl(
context,
socket,
server_side,
keyfile,
certfile,
certs_mode,
protocol,
cacertsfile,
null
);
}
public static object txt2obj(CodeContext context, string txt, [DefaultParameterValue(false)] object name) {
bool nam = PythonOps.IsTrue(name); // if true, we also look at short name and long name
Asn1Object obj = null;
if(nam) {
obj = _asn1Objects.Where(x => txt == x.OIDString || txt == x.ShortName || txt == x.LongName).FirstOrDefault();
} else {
obj = _asn1Objects.Where(x => txt == x.OIDString).FirstOrDefault();
}
if(obj == null) {
throw PythonOps.ValueError("unknown object '{0}'", txt);
}
return obj.ToTuple();
}
public static object nid2obj(CodeContext context, int nid) {
if(nid < 0) {
throw PythonOps.ValueError("NID must be positive");
}
var obj = _asn1Objects.Where(x => x.NID == nid).FirstOrDefault();
if(obj == null) {
throw PythonOps.ValueError("unknown NID {0}", nid);
}
return obj.ToTuple();
}
public static PythonList enum_certificates(string store_name) {
X509Store store = null;
try {
store = new X509Store(store_name, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
var result = new PythonList();
foreach (var cert in store.Certificates) {
string format = cert.GetFormat();
switch(format) {
case "X509":
format = "x509_asn";
break;
default:
format = "unknown";
break;
}
var set = new SetCollection();
bool found = false;
foreach (var ext in cert.Extensions) {
var keyUsage = ext as X509EnhancedKeyUsageExtension;
if (keyUsage != null) {
foreach(var oid in keyUsage.EnhancedKeyUsages) {
set.add(oid.Value);
}
found = true;
break;
}
}
result.Add(PythonTuple.MakeTuple(new Bytes(cert.RawData.ToList()), format, found ? set : ScriptingRuntimeHelpers.True));
}
return result;
} catch {
} finally {
store?.Close();
}
return new PythonList();
}
public static PythonList enum_crls(string store_name) {
X509Store store = null;
try {
store = new X509Store(store_name, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
var result = new PythonList();
foreach (var cert in store.Certificates) {
string format = cert.GetFormat();
}
} catch {
} finally {
store?.Close();
}
return new PythonList();
}
internal static PythonType SSLError(CodeContext/*!*/ context) {
return (PythonType)context.LanguageContext.GetModuleState("SSLError");
}
public static PythonDictionary _test_decode_cert(CodeContext context, string path) {
var cert = ReadCertificate(context, path);
return CertificateToPython(context, cert);
}
internal static PythonDictionary CertificateToPython(CodeContext context, X509Certificate cert) {
if (cert is X509Certificate2 cert2)
return CertificateToPython(context, cert2);
return CertificateToPython(context, new X509Certificate2(cert.GetRawCertData()));
}
internal static PythonDictionary CertificateToPython(CodeContext context, X509Certificate2 cert) {
var dict = new CommonDictionaryStorage();
dict.AddNoLock("notAfter", ToPythonDateFormat(cert.NotAfter));
dict.AddNoLock("subject", IssuerToPython(context, cert.Subject));
dict.AddNoLock("notBefore", ToPythonDateFormat(cert.NotBefore));
dict.AddNoLock("serialNumber", SerialNumberToPython(cert));
dict.AddNoLock("version", cert.Version);
dict.AddNoLock("issuer", IssuerToPython(context, cert.Issuer));
AddSubjectAltNames(dict, cert);
return new PythonDictionary(dict);
string ToPythonDateFormat(DateTime date) {
var dateStr = date.ToUniversalTime().ToString("MMM dd HH:mm:ss yyyy", CultureInfo.InvariantCulture) + " GMT";
if (dateStr[4] == '0')
dateStr = dateStr.Substring(0, 4) + " " + dateStr.Substring(5); // CPython uses leading space
return dateStr;
}
}
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));
// The string generated by format varies depending on the platform, for example:
// - On Windows, one entry per line:
// DNS Name=www.python.org
// DNS Name=pypi.python.org
// - On Mac/Linux (.NET Core), multiple entries on a single line:
// DNS:www.python.org, DNS:pypi.python.org
string line;
while (null != (line = sr.ReadLine())) {
line = line.Trim();
// On Linux and Mac (.NET Core), Format produces a string matching the OpenSSL format which may contain multiple entries:
foreach (var val in line.Split(',')) {
var keyValue = val.Split(new char[] { ':', '=' });
// On Windows, Format produces different results based on the locale so we can't check for a specific key
if (keyValue[0].Contains("DNS") && keyValue.Length == 2) {
altNames.Add(PythonTuple.MakeTuple("DNS", keyValue[1]));
}
}
}
dict.AddNoLock("subjectAltName", PythonTuple.MakeTuple(altNames.ToArray()));
break;
}
}
private static string SerialNumberToPython(X509Certificate2 cert) {
var res = cert.SerialNumber;
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);
}
}
}
if (token.Length > 0)
yield return token.ToString().Trim();
}
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(PythonTuple.MakeTuple(new object[] { field }));
}
}
return PythonTuple.MakeTuple(collector.ToReverseArray()); // CPython reverses the fields
}
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
private const int ClassOffset = 6;
private const int ClassMask = 0xc0;
private const int ClassUniversal = 0x00 << ClassOffset;
private const int ClassApplication = 0x01 << ClassOffset;
private const int ClassContextSpecific = 0x02 << ClassOffset;
private const int ClassPrivate = 0x03 << ClassOffset;
private const int NumberMask = 0x1f;
private const int UnivesalSequence = 0x10;
private const int UniversalInteger = 0x02;
private 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));
}
#region Exported constants
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;
public const int PROTOCOL_TLSv1_1 = 4;
public const int PROTOCOL_TLSv1_2 = 5;
public const uint OP_ALL = 0x80000BFF;
public const uint OP_DONT_INSERT_EMPTY_FRAGMENTS = 0x00000800;
public const int OP_NO_SSLv2 = 0x01000000;
public const int OP_NO_SSLv3 = 0x02000000;
public const int OP_NO_TLSv1 = 0x04000000;
public const int OP_NO_TLSv1_1 = 0x10000000;
public const int OP_NO_TLSv1_2 = 0x08000000;
internal const int OP_NO_COMPRESSION = 0x20000;
internal const int OP_NO_ALL = OP_NO_SSLv2 | OP_NO_SSLv3 | OP_NO_TLSv1 | OP_NO_TLSv1_1 | OP_NO_TLSv1_2 | OP_NO_COMPRESSION;
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 = 10;
public const int VERIFY_DEFAULT = 0;
public const int VERIFY_CRL_CHECK_LEAF = 0x4; // from openssl/x509_vfy.h
public const int VERIFY_CRL_CHECK_CHAIN = 0x4 | 0x8; // from openssl/x509_vfy.h
public const int VERIFY_X509_STRICT = 0x20; // from openssl/x509_vfy.h
public const int VERIFY_X509_TRUSTED_FIRST = 0x8000; // from openssl/x509_vfy.h
public const bool HAS_SNI = true;
public const bool HAS_ECDH = true;
public const bool HAS_NPN = false;
public const bool HAS_ALPN = false;
public const bool HAS_TLS_UNIQUE = false;
private const int SSL_VERIFY_NONE = 0x00;
private const int SSL_VERIFY_PEER = 0x01;
private const int SSL_VERIFY_FAIL_IF_NO_PEER_CERT = 0x02;
private const int SSL_VERIFY_CLIENT_ONCE = 0x04;
#endregion
}
}
#endif