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Add function to compute MD5 from certificate

This commit is contained in:
Davide De Rosa 2018-10-18 12:01:07 +02:00
parent cc84653864
commit 872e20a95a
5 changed files with 67 additions and 0 deletions
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4
TunnelKit.xcodeproj/project.pbxproj
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@ -45,6 +45,7 @@
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0E58F1302138AC2F00A49F27 /* DNSTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E58F12F2138AC2F00A49F27 /* DNSTests.swift */; };
0E749F622178911D00BB2701 /* pia-2048.pem in Resources */ = {isa = PBXBuildFile; fileRef = 0E749F612178911C00BB2701 /* pia-2048.pem */; };
0E85A25A202CC5AF0059E9F9 /* AppExtensionTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E85A259202CC5AE0059E9F9 /* AppExtensionTests.swift */; };
0E9379C91F819A4300CE91B6 /* TunnelKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0E17D7F91F730D9F009EE129 /* TunnelKit.framework */; };
0EB2B45320F0BB44004233D7 /* EncryptionTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0EB2B45220F0BB44004233D7 /* EncryptionTests.swift */; };
@ -214,6 +215,7 @@
0E58F12F2138AC2F00A49F27 /* DNSTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DNSTests.swift; sourceTree = "<group>"; };
0E6479DD212EAC96008E6888 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
0E6479E0212EACD6008E6888 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
0E749F612178911C00BB2701 /* pia-2048.pem */ = {isa = PBXFileReference; lastKnownFileType = text; path = "pia-2048.pem"; sourceTree = "<group>"; };
0E85A259202CC5AE0059E9F9 /* AppExtensionTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppExtensionTests.swift; sourceTree = "<group>"; };
0E85A25B202CCA3D0059E9F9 /* TunnelKitHost.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = TunnelKitHost.entitlements; sourceTree = "<group>"; };
0EB2B45220F0BB44004233D7 /* EncryptionTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EncryptionTests.swift; sourceTree = "<group>"; };
@ -340,6 +342,7 @@
0EB2B45620F0BD16004233D7 /* RandomTests.swift */,
0EB2B45C20F0BF41004233D7 /* RawPerformanceTests.swift */,
0EB2B45A20F0BE4C004233D7 /* TestUtils.swift */,
0E749F612178911C00BB2701 /* pia-2048.pem */,
);
path = TunnelKitTests;
sourceTree = "<group>";
@ -719,6 +722,7 @@
isa = PBXResourcesBuildPhase;
buildActionMask = 2147483647;
files = (
0E749F622178911D00BB2701 /* pia-2048.pem in Resources */,
);
runOnlyForDeploymentPostprocessing = 0;
};

2
TunnelKit/Sources/Core/TLSBox.h
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@ -51,6 +51,8 @@ extern NSString *const TLSBoxPeerVerificationErrorNotification;
//
@interface TLSBox : NSObject
+ (NSString *)md5ForCertificatePath:(NSString *)path;
- (instancetype)initWithCAPath:(NSString *)caPath
clientCertificatePath:(nullable NSString *)clientCertificatePath
clientKeyPath:(nullable NSString *)clientKeyPath;

19
TunnelKit/Sources/Core/TLSBox.m
View File

@ -75,6 +75,25 @@ int TLSBoxVerifyPeer(int ok, X509_STORE_CTX *ctx) {
@implementation TLSBox
+ (NSString *)md5ForCertificatePath:(NSString *)path
{
const EVP_MD *alg = EVP_get_digestbyname("MD5");
uint8_t md[16];
unsigned int len;
FILE *pem = fopen([path cStringUsingEncoding:NSASCIIStringEncoding], "r");
X509 *cert = PEM_read_X509(pem, NULL, NULL, NULL);
X509_digest(cert, alg, md, &len);
X509_free(cert);
NSCAssert2(len == sizeof(md), @"Unexpected MD5 size (%d != %lu)", len, sizeof(md));
NSMutableString *hex = [[NSMutableString alloc] initWithCapacity:2 * sizeof(md)];
for (int i = 0; i < sizeof(md); ++i) {
[hex appendFormat:@"%02x", md[i]];
}
return hex;
}
- (instancetype)init
{
[NSException raise:NSInvalidArgumentException format:@"Use initWithCAPath:clientCertificatePath:clientKeyPath:"];

8
TunnelKitTests/EncryptionTests.swift
View File

@ -86,6 +86,14 @@ class EncryptionTests: XCTestCase {
let decrypted = try! server.decrypter().decryptData(encrypted, extra: extra)
XCTAssertEqual(plain, decrypted)
}
func testCertificateMD5() {
let path = Bundle(for: EncryptionTests.self).path(forResource: "pia-2048", ofType: "pem")!
let md5 = TLSBox.md5(forCertificatePath: path)
let exp = "e2fccccaba712ccc68449b1c56427ac1"
print(md5)
XCTAssertEqual(md5, exp)
}
private func clientServer(_ c: String?, _ d: String?) -> (CryptoBox, CryptoBox) {
let client = CryptoBox(cipherAlgorithm: c, digestAlgorithm: d)

34
TunnelKitTests/pia-2048.pem Normal file
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@ -0,0 +1,34 @@
-----BEGIN CERTIFICATE-----
MIIFqzCCBJOgAwIBAgIJAKZ7D5Yv87qDMA0GCSqGSIb3DQEBDQUAMIHoMQswCQYD
VQQGEwJVUzELMAkGA1UECBMCQ0ExEzARBgNVBAcTCkxvc0FuZ2VsZXMxIDAeBgNV
BAoTF1ByaXZhdGUgSW50ZXJuZXQgQWNjZXNzMSAwHgYDVQQLExdQcml2YXRlIElu
dGVybmV0IEFjY2VzczEgMB4GA1UEAxMXUHJpdmF0ZSBJbnRlcm5ldCBBY2Nlc3Mx
IDAeBgNVBCkTF1ByaXZhdGUgSW50ZXJuZXQgQWNjZXNzMS8wLQYJKoZIhvcNAQkB
FiBzZWN1cmVAcHJpdmF0ZWludGVybmV0YWNjZXNzLmNvbTAeFw0xNDA0MTcxNzM1
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a5PgrtxfwTumD4+3/SYvwoD66cB8IcK//h1mCzAduU8KgUXocLx7QgJWo9lnZ8xU
ryXvWab2usg4fqk7FPi00bED4f4qVQFVfGfPZIH9QQ7/48bPM9RyfzImZWUCenK3
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YDQ8z9v+DMO6iwyIDRiU
-----END CERTIFICATE-----