public SignedFileContentKey(ImmutableArray <byte> contentHash, string fileName)
{
Debug.Assert(!contentHash.IsDefault);
Debug.Assert(fileName != null);
StringHash = ContentUtil.HashToString(contentHash);
FileName = fileName;
}
internal void ReadExistingContainerSigningCache()
{
_log.LogMessage("Loading existing files from cache");
foreach (var file in Directory.EnumerateFiles(_pathToContainerUnpackingDirectory, "*.*", SearchOption.AllDirectories))
{
string cacheRelative = file.Replace(_pathToContainerUnpackingDirectory + Path.DirectorySeparatorChar, "");
int indexOfHash = cacheRelative.IndexOf(Path.DirectorySeparatorChar);
if (indexOfHash <= 0)
{
continue;
}
// When reading from an existing cache use the already computed hash from the directory
// structure instead of computing it from the file because things like signing
// might have changed the hash but we want to still use the same hash of the unsigned
// file that originally built the cache.
string stringHash = cacheRelative.Substring(0, indexOfHash);
ImmutableArray <byte> contentHash;
try
{
contentHash = ContentUtil.StringToHash(stringHash);
}
catch
{
_log.LogMessage($"Failed to parse the content hash from path '{file}' so skipping it.");
continue;
}
// if the content of the file doesn't match the hash in file path than the file has changed
// which indicates that it was signed so we need to ensure we repack the binary with the signed version
string actualFileHash = ContentUtil.HashToString(ContentUtil.GetContentHash(file));
bool forceRepack = stringHash != actualFileHash;
_hashToCollisionIdMap.TryGetValue(new SignedFileContentKey(contentHash, Path.GetFileName(file)), out string collisionPriorityId);
TrackFile(file, collisionPriorityId, contentHash, false, forceRepack, containerPath: file);
}
_log.LogMessage("Done loading existing files from cache");
}
/// <summary>
/// Build up the <see cref="ZipData"/> instance for a given zip container. This will also report any consistency
/// errors found when examining the zip archive.
/// </summary>
private bool TryBuildZipData(FileSignInfo zipFileSignInfo, out ZipData zipData)
{
Debug.Assert(zipFileSignInfo.IsZipContainer());
try
{
using (var archive = new ZipArchive(File.OpenRead(zipFileSignInfo.FullPath), ZipArchiveMode.Read))
{
var nestedParts = new List <ZipPart>();
foreach (ZipArchiveEntry entry in archive.Entries)
{
string relativePath = entry.FullName;
// `entry` might be just a pointer to a folder. We skip those.
if (relativePath.EndsWith("/") && entry.Name == "")
{
continue;
}
ImmutableArray <byte> contentHash;
using (var stream = entry.Open())
{
contentHash = ContentUtil.GetContentHash(stream);
}
var fileUniqueKey = new SignedFileContentKey(contentHash, relativePath);
if (!_whichPackagesTheFileIsIn.TryGetValue(fileUniqueKey, out var packages))
{
packages = new HashSet <string>();
}
packages.Add(zipFileSignInfo.FileName);
_whichPackagesTheFileIsIn[fileUniqueKey] = packages;
// if we already encountered file that hash the same content we can reuse its signed version when repackaging the container.
var fileName = Path.GetFileName(relativePath);
if (!_filesByContentKey.TryGetValue(new SignedFileContentKey(contentHash, fileName), out var fileSignInfo))
{
string extractPathRoot = _useHashInExtractionPath ? ContentUtil.HashToString(contentHash) : _filesByContentKey.Count().ToString();
string tempPath = Path.Combine(_pathToContainerUnpackingDirectory, extractPathRoot, relativePath);
_log.LogMessage($"Extracting file '{fileName}' from '{zipFileSignInfo.FullPath}' to '{tempPath}'.");
Directory.CreateDirectory(Path.GetDirectoryName(tempPath));
using (var stream = entry.Open())
using (var tempFileStream = File.OpenWrite(tempPath))
{
stream.CopyTo(tempFileStream);
}
fileSignInfo = TrackFile(tempPath, contentHash, isNested: true);
}
if (fileSignInfo.SignInfo.ShouldSign || fileSignInfo.ForceRepack)
{
nestedParts.Add(new ZipPart(relativePath, fileSignInfo));
}
}
zipData = new ZipData(zipFileSignInfo, nestedParts.ToImmutableArray());
return(true);
}
}
catch (Exception e)
{
_log.LogErrorFromException(e);
zipData = null;
return(false);
}
}
private FileSignInfo ExtractSignInfo(string fullPath, ImmutableArray <byte> hash, bool forceRepack = false)
{
// Try to determine default certificate name by the extension of the file
var hasSignInfo = _fileExtensionSignInfo.TryGetValue(Path.GetExtension(fullPath), out var signInfo);
var fileName = Path.GetFileName(fullPath);
var extension = Path.GetExtension(fullPath);
string explicitCertificateName = null;
var fileSpec = string.Empty;
var isAlreadySigned = false;
var matchedNameTokenFramework = false;
var matchedNameToken = false;
var matchedName = false;
PEInfo peInfo = null;
if (FileSignInfo.IsPEFile(fullPath))
{
using (var stream = File.OpenRead(fullPath))
{
isAlreadySigned = ContentUtil.IsAuthenticodeSigned(stream);
}
peInfo = GetPEInfo(fullPath);
// Get the default sign info based on the PKT, if applicable:
if (peInfo.IsManaged && _strongNameInfo.TryGetValue(peInfo.PublicKeyToken, out var pktBasedSignInfo))
{
if (peInfo.IsCrossgened)
{
signInfo = new SignInfo(pktBasedSignInfo.Certificate);
}
else
{
signInfo = pktBasedSignInfo;
}
hasSignInfo = true;
}
// Check if we have more specific sign info:
matchedNameTokenFramework = _fileSignInfo.TryGetValue(new ExplicitCertificateKey(fileName, peInfo.PublicKeyToken, peInfo.TargetFramework), out explicitCertificateName);
matchedNameToken = !matchedNameTokenFramework && _fileSignInfo.TryGetValue(new ExplicitCertificateKey(fileName, peInfo.PublicKeyToken), out explicitCertificateName);
fileSpec = matchedNameTokenFramework ? $" (PublicKeyToken = {peInfo.PublicKeyToken}, Framework = {peInfo.TargetFramework})" :
matchedNameToken ? $" (PublicKeyToken = {peInfo.PublicKeyToken})" : string.Empty;
}
// We didn't find any specific information for PE files using PKT + TargetFramework
if (explicitCertificateName == null)
{
matchedName = _fileSignInfo.TryGetValue(new ExplicitCertificateKey(fileName), out explicitCertificateName);
}
// If has overriding info, is it for ignoring the file?
if (SignToolConstants.IgnoreFileCertificateSentinel.Equals(explicitCertificateName, StringComparison.OrdinalIgnoreCase))
{
_log.LogMessage($"File configured to not be signed: {fileName}{fileSpec}");
return(new FileSignInfo(fullPath, hash, SignInfo.Ignore, forceRepack: forceRepack));
}
// Do we have an explicit certificate after all?
if (explicitCertificateName != null)
{
signInfo = signInfo.WithCertificateName(explicitCertificateName);
hasSignInfo = true;
}
if (hasSignInfo)
{
if (isAlreadySigned && !_dualCertificates.Contains(signInfo.Certificate))
{
return(new FileSignInfo(fullPath, hash, SignInfo.AlreadySigned, forceRepack: forceRepack));
}
// TODO: implement this check for native PE files as well:
// extract copyright from native resource (.rsrc section)
if (signInfo.ShouldSign && peInfo != null && peInfo.IsManaged)
{
bool?isMicrosoftLibrary = IsMicrosoftLibrary(peInfo.Copyright);
bool isMicrosoftCertificate = !IsThirdPartyCertificate(signInfo.Certificate);
if (isMicrosoftLibrary.HasValue && isMicrosoftLibrary != isMicrosoftCertificate)
{
if (isMicrosoftLibrary.Value)
{
LogWarning(SigningToolErrorCode.SIGN001, $"Signing Microsoft library '{fullPath}' with 3rd party certificate '{signInfo.Certificate}'. The library is considered Microsoft library due to its copyright: '{peInfo.Copyright}'.");
}
else
{
LogWarning(SigningToolErrorCode.SIGN001, $"Signing 3rd party library '{fullPath}' with Microsoft certificate '{signInfo.Certificate}'. The library is considered 3rd party library due to its copyright: '{peInfo.Copyright}'.");
}
}
}
return(new FileSignInfo(fullPath, hash, signInfo, (peInfo != null && peInfo.TargetFramework != "") ? peInfo.TargetFramework : null, forceRepack: forceRepack));
}
if (SignToolConstants.SignableExtensions.Contains(extension) || SignToolConstants.SignableOSXExtensions.Contains(extension))
{
// Extract the relative path inside the package / otherwise just return the full path of the file
var contentHash = ContentUtil.GetContentHash(fullPath);
var tempDir = Path.Combine(_pathToContainerUnpackingDirectory, ContentUtil.HashToString(contentHash));
var relativePath = fullPath.Replace($@"{tempDir}\", "");
LogError(SigningToolErrorCode.SIGN002, new SignedFileContentKey(contentHash, relativePath));
}
else
{
_log.LogMessage($"Ignoring non-signable file: {fullPath}");
}
return(new FileSignInfo(fullPath, hash, SignInfo.Ignore, forceRepack: forceRepack));
}
/// <summary>
/// Build up the <see cref="ZipData"/> instance for a given zip container. This will also report any consistency
/// errors found when examining the zip archive.
/// </summary>
private bool TryBuildZipData(FileSignInfo zipFileSignInfo, out ZipData zipData)
{
Debug.Assert(zipFileSignInfo.IsZipContainer());
try
{
using (var archive = new ZipArchive(File.OpenRead(zipFileSignInfo.FullPath), ZipArchiveMode.Read))
{
var nestedParts = new List <ZipPart>();
foreach (ZipArchiveEntry entry in archive.Entries)
{
string relativePath = entry.FullName;
// `entry` might be just a pointer to a folder. We skip those.
if (relativePath.EndsWith("/") && entry.Name == "")
{
continue;
}
ImmutableArray <byte> contentHash;
using (var stream = entry.Open())
{
contentHash = ContentUtil.GetContentHash(stream);
}
// if we already encountered file that hash the same content we can reuse its signed version when repackaging the container.
string fileName = Path.GetFileName(relativePath);
if (!_filesByContentKey.TryGetValue(new SignedFileContentKey(contentHash, fileName), out var fileSignInfo))
{
string tempDir = Path.Combine(_pathToContainerUnpackingDirectory, ContentUtil.HashToString(contentHash));
string tempPath = Path.Combine(tempDir, Path.GetFileName(relativePath));
Directory.CreateDirectory(tempDir);
using (var stream = entry.Open())
using (var tempFileStream = File.OpenWrite(tempPath))
{
stream.CopyTo(tempFileStream);
}
fileSignInfo = TrackFile(tempPath, contentHash, isNested: true);
}
if (fileSignInfo.SignInfo.ShouldSign)
{
nestedParts.Add(new ZipPart(relativePath, fileSignInfo));
}
}
zipData = new ZipData(zipFileSignInfo, nestedParts.ToImmutableArray());
return(true);
}
}
catch (Exception e)
{
_log.LogErrorFromException(e);
zipData = null;
return(false);
}
}
/// <summary>
/// Build up the <see cref="ZipData"/> instance for a given zip container. This will also report any consistency
/// errors found when examining the zip archive.
/// </summary>
private bool TryBuildZipData(FileSignInfo zipFileSignInfo, out ZipData zipData)
{
Debug.Assert(zipFileSignInfo.IsZipContainer());
try
{
using (var archive = new ZipArchive(File.OpenRead(zipFileSignInfo.FullPath), ZipArchiveMode.Read))
{
var nestedParts = new List <ZipPart>();
foreach (ZipArchiveEntry entry in archive.Entries)
{
string relativePath = entry.FullName;
string extension = Path.GetExtension(relativePath);
if (!FileSignInfo.IsZipContainer(relativePath) && (!_fileExtensionSignInfo.TryGetValue(extension, out var extensionSignInfo) || !extensionSignInfo.ShouldSign))
{
var reason = extensionSignInfo.ShouldIgnore ? "configuration tells to ignore this extension" : "its extension isn't on recognizable signing extension list";
_log.LogMessage($"Ignoring this file because {reason} : {relativePath}");
continue;
}
ImmutableArray <byte> contentHash;
using (var stream = entry.Open())
{
contentHash = ContentUtil.GetContentHash(stream);
}
// if we already encountered file that hash the same content we can reuse its signed version when repackaging the container.
string fileName = Path.GetFileName(relativePath);
if (!_filesByContentKey.TryGetValue(new SignedFileContentKey(contentHash, fileName), out var fileSignInfo))
{
string tempDir = Path.Combine(_pathToContainerUnpackingDirectory, ContentUtil.HashToString(contentHash));
string tempPath = Path.Combine(tempDir, Path.GetFileName(relativePath));
Directory.CreateDirectory(tempDir);
using (var stream = entry.Open())
using (var tempFileStream = File.OpenWrite(tempPath))
{
stream.CopyTo(tempFileStream);
}
fileSignInfo = TrackFile(tempPath, contentHash, isNested: true);
}
if (fileSignInfo.SignInfo.ShouldSign)
{
nestedParts.Add(new ZipPart(relativePath, fileSignInfo));
}
}
zipData = new ZipData(zipFileSignInfo, nestedParts.ToImmutableArray());
return(true);
}
}
catch (Exception e)
{
_log.LogErrorFromException(e);
zipData = null;
return(false);
}
}
private FileSignInfo ExtractSignInfo(
string fullPath,
string collisionPriorityId,
ImmutableArray <byte> hash,
bool forceRepack = false,
string wixContentFilePath = null,
string containerPath = null)
{
var fileName = Path.GetFileName(fullPath);
var extension = Path.GetExtension(fullPath);
string explicitCertificateName = null;
var fileSpec = string.Empty;
var isAlreadySigned = false;
var matchedNameTokenFramework = false;
var matchedNameToken = false;
var matchedName = false;
PEInfo peInfo = null;
string stringHash = ContentUtil.HashToString(hash);
// Asset is nested asset part of a container. Try to get it from the visited assets first
if (string.IsNullOrEmpty(collisionPriorityId) &&
!string.IsNullOrEmpty(containerPath))
{
if (!_hashToCollisionIdMap.TryGetValue(stringHash, out collisionPriorityId))
{
// Hash doesn't exist so we use the CollisionPriorityId from the parent container
string parentStringHash = ContentUtil.HashToString(ContentUtil.GetContentHash(containerPath));
collisionPriorityId = _hashToCollisionIdMap[parentStringHash];
}
}
// Update the hash map
if (!_hashToCollisionIdMap.ContainsKey(stringHash))
{
_hashToCollisionIdMap.Add(stringHash, collisionPriorityId);
}
else
{
string existingCollisionId = _hashToCollisionIdMap[stringHash];
// If we find that there is an asset which already was processed which has a lower
// collision id, we use that and update the map so we give it precedence
if (string.Compare(collisionPriorityId, existingCollisionId) < 0)
{
_hashToCollisionIdMap[stringHash] = collisionPriorityId;
}
}
// Try to determine default certificate name by the extension of the file. Since there might be dupes
// we get the one which maps a collision id or the first of the returned ones in case there is no
// collision id
bool hasSignInfos = _fileExtensionSignInfo.TryGetValue(Path.GetExtension(fullPath), out var signInfos);
SignInfo signInfo = SignInfo.Ignore;
bool hasSignInfo = false;
if (hasSignInfos)
{
if (!string.IsNullOrEmpty(collisionPriorityId))
{
hasSignInfo = signInfos.Where(s => s.CollisionPriorityId == collisionPriorityId).Any();
signInfo = signInfos.Where(s => s.CollisionPriorityId == collisionPriorityId).FirstOrDefault();
}
else
{
hasSignInfo = true;
signInfo = signInfos.FirstOrDefault();
}
}
if (FileSignInfo.IsPEFile(fullPath))
{
using (var stream = File.OpenRead(fullPath))
{
isAlreadySigned = ContentUtil.IsAuthenticodeSigned(stream);
}
peInfo = GetPEInfo(fullPath);
if (peInfo.IsManaged && _strongNameInfo.TryGetValue(peInfo.PublicKeyToken, out var pktBasedSignInfos))
{
// Get the default sign info based on the PKT, if applicable. Since there might be dupes
// we get the one which maps a collision id or the first of the returned ones in case there is no
// collision id
SignInfo pktBasedSignInfo = SignInfo.Ignore;
if (!string.IsNullOrEmpty(collisionPriorityId))
{
pktBasedSignInfo = pktBasedSignInfos.Where(s => s.CollisionPriorityId == collisionPriorityId).FirstOrDefault();
}
else
{
pktBasedSignInfo = pktBasedSignInfos.FirstOrDefault();
}
if (peInfo.IsCrossgened)
{
signInfo = new SignInfo(pktBasedSignInfo.Certificate, collisionPriorityId: _hashToCollisionIdMap[stringHash]);
}
else
{
signInfo = pktBasedSignInfo;
}
hasSignInfo = true;
}
// Check if we have more specific sign info:
matchedNameTokenFramework = _fileSignInfo.TryGetValue(new ExplicitCertificateKey(fileName, peInfo.PublicKeyToken, peInfo.TargetFramework, _hashToCollisionIdMap[stringHash]), out explicitCertificateName);
matchedNameToken = !matchedNameTokenFramework && _fileSignInfo.TryGetValue(new ExplicitCertificateKey(fileName, peInfo.PublicKeyToken, collisionPriorityId: _hashToCollisionIdMap[stringHash]), out explicitCertificateName);
fileSpec = matchedNameTokenFramework ? $" (PublicKeyToken = {peInfo.PublicKeyToken}, Framework = {peInfo.TargetFramework})" :
matchedNameToken ? $" (PublicKeyToken = {peInfo.PublicKeyToken})" : string.Empty;
}
// We didn't find any specific information for PE files using PKT + TargetFramework
if (explicitCertificateName == null)
{
matchedName = _fileSignInfo.TryGetValue(new ExplicitCertificateKey(fileName, collisionPriorityId: _hashToCollisionIdMap[stringHash]), out explicitCertificateName);
}
// If has overriding info, is it for ignoring the file?
if (SignToolConstants.IgnoreFileCertificateSentinel.Equals(explicitCertificateName, StringComparison.OrdinalIgnoreCase))
{
_log.LogMessage($"File configured to not be signed: {fileName}{fileSpec}");
return(new FileSignInfo(fullPath, hash, SignInfo.Ignore, forceRepack: forceRepack));
}
// Do we have an explicit certificate after all?
if (explicitCertificateName != null)
{
signInfo = signInfo.WithCertificateName(explicitCertificateName, _hashToCollisionIdMap[stringHash]);
hasSignInfo = true;
}
if (hasSignInfo)
{
bool dualCerts = _dualCertificates
.Where(d => d.ItemSpec == signInfo.Certificate &&
d.GetMetadata(SignToolConstants.CollisionPriorityId) == _hashToCollisionIdMap[stringHash]).Any();
if (isAlreadySigned && !dualCerts)
{
return(new FileSignInfo(fullPath, hash, SignInfo.AlreadySigned, forceRepack: forceRepack, wixContentFilePath: wixContentFilePath));
}
// TODO: implement this check for native PE files as well:
// extract copyright from native resource (.rsrc section)
if (signInfo.ShouldSign && peInfo != null && peInfo.IsManaged)
{
bool isMicrosoftLibrary = IsMicrosoftLibrary(peInfo.Copyright);
bool isMicrosoftCertificate = !IsThirdPartyCertificate(signInfo.Certificate);
if (isMicrosoftLibrary != isMicrosoftCertificate)
{
if (isMicrosoftLibrary)
{
LogWarning(SigningToolErrorCode.SIGN001, $"Signing Microsoft library '{fullPath}' with 3rd party certificate '{signInfo.Certificate}'. The library is considered Microsoft library due to its copyright: '{peInfo.Copyright}'.");
}
else
{
LogWarning(SigningToolErrorCode.SIGN001, $"Signing 3rd party library '{fullPath}' with Microsoft certificate '{signInfo.Certificate}'. The library is considered 3rd party library due to its copyright: '{peInfo.Copyright}'.");
}
}
}
return(new FileSignInfo(fullPath, hash, signInfo, (peInfo != null && peInfo.TargetFramework != "") ? peInfo.TargetFramework : null, forceRepack: forceRepack, wixContentFilePath: wixContentFilePath));
}
if (SignToolConstants.SignableExtensions.Contains(extension) || SignToolConstants.SignableOSXExtensions.Contains(extension))
{
// Extract the relative path inside the package / otherwise just return the full path of the file
var contentHash = ContentUtil.GetContentHash(fullPath);
var tempDir = Path.Combine(_pathToContainerUnpackingDirectory, ContentUtil.HashToString(contentHash));
var relativePath = fullPath.Replace($@"{tempDir}\", "");
LogError(SigningToolErrorCode.SIGN002, new SignedFileContentKey(contentHash, relativePath));
}
else
{
_log.LogMessage($"Ignoring non-signable file: {fullPath}");
}
return(new FileSignInfo(fullPath, hash, SignInfo.Ignore, forceRepack: forceRepack, wixContentFilePath: wixContentFilePath));
}