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https://github.com/Ylianst/MeshCentral.git
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Improved authenticode.js error handling for #4134
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Ylian Saint-Hilaire
parent
18c11a344c
commit
bf128a988c
148
authenticode.js
148
authenticode.js
@ -288,77 +288,95 @@ function createAuthenticodeHandler(path) {
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var derlen = forge.asn1.getBerValueLength(forge.util.createBuffer(pkcs7raw.slice(1, 5))) + 4;
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if (derlen != pkcs7raw.length) { pkcs7raw = pkcs7raw.slice(0, derlen); }
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// Decode the signature block
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var pkcs7der = forge.asn1.fromDer(forge.util.createBuffer(pkcs7raw));
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// Decode the signature block and check that it's valid
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var pkcs7der = null, valid = false;
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try { pkcs7der = forge.asn1.fromDer(forge.util.createBuffer(pkcs7raw)); } catch (ex) { }
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try { valid = ((pkcs7der != null) && (forge.asn1.derToOid(pkcs7der.value[1].value[0].value[2].value[0].value) == "1.3.6.1.4.1.311.2.1.4")); } catch (ex) { }
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if (pkcs7der == null) {
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// Can't decode the signature
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obj.header.sigpos = 0;
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obj.header.siglen = 0;
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obj.header.signed = false;
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} else {
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// To work around ForgeJS PKCS#7 limitation, this may break PKCS7 verify if ForgeJS adds support for it in the future
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// Switch content type from "1.3.6.1.4.1.311.2.1.4" to "1.2.840.113549.1.7.1"
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pkcs7der.value[1].value[0].value[2].value[0].value = forge.asn1.oidToDer(forge.pki.oids.data).data;
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// To work around ForgeJS PKCS#7 limitation, this may break PKCS7 verify if ForgeJS adds support for it in the future
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// Switch content type from "1.3.6.1.4.1.311.2.1.4" to "1.2.840.113549.1.7.1"
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pkcs7der.value[1].value[0].value[2].value[0].value = forge.asn1.oidToDer(forge.pki.oids.data).data;
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// Decode the PKCS7 message
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var pkcs7 = null, pkcs7content = null;
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try {
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pkcs7 = p7.messageFromAsn1(pkcs7der);
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pkcs7content = pkcs7.rawCapture.content.value[0];
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} catch (ex) { }
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// Decode the PKCS7 message
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var pkcs7 = p7.messageFromAsn1(pkcs7der);
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var pkcs7content = pkcs7.rawCapture.content.value[0];
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if ((pkcs7 == null) || (pkcs7content == null)) {
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// Can't decode the signature
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obj.header.sigpos = 0;
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obj.header.siglen = 0;
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obj.header.signed = false;
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} else {
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// Verify a PKCS#7 signature
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// Verify is not currently supported in node-forge, but if implemented in the future, this code could work.
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//var caStore = forge.pki.createCaStore();
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//for (var i in obj.certificates) { caStore.addCertificate(obj.certificates[i]); }
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// Return is true if all signatures are valid and chain up to a provided CA
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//if (!pkcs7.verify(caStore)) { throw ('Executable file has an invalid signature.'); }
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// Verify a PKCS#7 signature
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// Verify is not currently supported in node-forge, but if implemented in the future, this code could work.
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//var caStore = forge.pki.createCaStore();
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//for (var i in obj.certificates) { caStore.addCertificate(obj.certificates[i]); }
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// Return is true if all signatures are valid and chain up to a provided CA
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//if (!pkcs7.verify(caStore)) { throw ('Executable file has an invalid signature.'); }
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// Get the signing attributes
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obj.signingAttribs = [];
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try {
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for (var i in pkcs7.rawCapture.authenticatedAttributes) {
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if (
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(pkcs7.rawCapture.authenticatedAttributes[i].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[0] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[0].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value != null) &&
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(forge.asn1.derToOid(pkcs7.rawCapture.authenticatedAttributes[i].value[0].value) == obj.Oids.SPC_SP_OPUS_INFO_OBJID)) {
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for (var j in pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value) {
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// Get the signing attributes
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obj.signingAttribs = [];
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try {
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for (var i in pkcs7.rawCapture.authenticatedAttributes) {
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if (
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value[0] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value[0].value != null)
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) {
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var v = pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value[0].value;
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if (v.startsWith('http://') || v.startsWith('https://') || ((v.length % 2) == 1)) { obj.signingAttribs.push(v); } else {
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var r = ''; // This string value is in UCS2 format, convert it to a normal string.
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for (var k = 0; k < v.length; k += 2) { r += String.fromCharCode((v.charCodeAt(k + 8) << 8) + v.charCodeAt(k + 1)); }
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obj.signingAttribs.push(r);
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(pkcs7.rawCapture.authenticatedAttributes[i].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[0] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[0].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value != null) &&
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(forge.asn1.derToOid(pkcs7.rawCapture.authenticatedAttributes[i].value[0].value) == obj.Oids.SPC_SP_OPUS_INFO_OBJID)) {
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for (var j in pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value) {
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if (
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value[0] != null) &&
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(pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value[0].value != null)
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) {
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var v = pkcs7.rawCapture.authenticatedAttributes[i].value[1].value[0].value[j].value[0].value;
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if (v.startsWith('http://') || v.startsWith('https://') || ((v.length % 2) == 1)) { obj.signingAttribs.push(v); } else {
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var r = ''; // This string value is in UCS2 format, convert it to a normal string.
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for (var k = 0; k < v.length; k += 2) { r += String.fromCharCode((v.charCodeAt(k + 8) << 8) + v.charCodeAt(k + 1)); }
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obj.signingAttribs.push(r);
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}
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}
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}
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}
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}
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} catch (ex) { }
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// Set the certificate chain
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obj.certificates = pkcs7.certificates;
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// Set the signature
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obj.signature = Buffer.from(pkcs7.rawCapture.signature, 'binary');
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// Get the file hashing algorithm
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var hashAlgoOid = forge.asn1.derToOid(pkcs7content.value[1].value[0].value[0].value);
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switch (hashAlgoOid) {
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case forge.pki.oids.sha256: { obj.fileHashAlgo = 'sha256'; break; }
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case forge.pki.oids.sha384: { obj.fileHashAlgo = 'sha384'; break; }
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case forge.pki.oids.sha512: { obj.fileHashAlgo = 'sha512'; break; }
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case forge.pki.oids.sha224: { obj.fileHashAlgo = 'sha224'; break; }
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case forge.pki.oids.md5: { obj.fileHashAlgo = 'md5'; break; }
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}
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// Get the signed file hash
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obj.fileHashSigned = Buffer.from(pkcs7content.value[1].value[1].value, 'binary')
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// Compute the actual file hash
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if (obj.fileHashAlgo != null) { obj.fileHashActual = obj.getHash(obj.fileHashAlgo); }
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}
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} catch (ex) { }
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// Set the certificate chain
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obj.certificates = pkcs7.certificates;
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// Set the signature
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obj.signature = Buffer.from(pkcs7.rawCapture.signature, 'binary');
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// Get the file hashing algorithm
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var hashAlgoOid = forge.asn1.derToOid(pkcs7content.value[1].value[0].value[0].value);
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switch (hashAlgoOid) {
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case forge.pki.oids.sha256: { obj.fileHashAlgo = 'sha256'; break; }
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case forge.pki.oids.sha384: { obj.fileHashAlgo = 'sha384'; break; }
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case forge.pki.oids.sha512: { obj.fileHashAlgo = 'sha512'; break; }
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case forge.pki.oids.sha224: { obj.fileHashAlgo = 'sha224'; break; }
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case forge.pki.oids.md5: { obj.fileHashAlgo = 'md5'; break; }
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}
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// Get the signed file hash
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obj.fileHashSigned = Buffer.from(pkcs7content.value[1].value[1].value, 'binary')
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// Compute the actual file hash
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if (obj.fileHashAlgo != null) { obj.fileHashActual = obj.getHash(obj.fileHashAlgo); }
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}
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return true;
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}
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@ -486,7 +504,7 @@ function createAuthenticodeHandler(path) {
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fs.closeSync(output);
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// Indicate we are done
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func(null, written);
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func(null);
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});
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});
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@ -1372,7 +1390,7 @@ function createAuthenticodeHandler(path) {
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// Close the file
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fs.closeSync(output);
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func(null, written);
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func(null);
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}
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// Save an executable without the signature
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@ -1635,7 +1653,7 @@ function createAuthenticodeHandler(path) {
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fs.closeSync(output);
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// Indicate success
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func(null, written);
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func(null);
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}
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function writeExecutableEx(output, p7signature, written, func) {
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@ -1669,7 +1687,7 @@ function createAuthenticodeHandler(path) {
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fs.closeSync(output);
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// Indicate success
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func(null, written);
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func(null);
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}
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// Return null if we could not open the file
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