/*

     File: RSAOperationsTestsT.m

 Abstract: Unit tests for the RSA operations that use the SecTransform API.

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#import "RSAOperationsTestsT.h"

#import "QCCRSASHA1SignT.h"

#import "QCCRSASHA1VerifyT.h"

#import "QCCRSASmallCryptorT.h"

#import "ToolCommon.h"

#import "QHex.h"

#include <sys/utsname.h>

@interface RSAOperationsTestsT ()

@property (nonatomic, assign, readonly ) SecKeyRef  publicKey;

@property (nonatomic, assign, readonly ) SecKeyRef  privateKey;

@property (nonatomic, assign, readwrite) BOOL       rsaWithoutPaddingImplemented;

@end

@implementation RSAOperationsTestsT : SenTestCase

- (void)setUp

{

    OSStatus        err;

    CFTypeRef       matchResult;

    [super setUp];

    [ToolCommon sharedInstance].debugRunOpOnMainThread = YES;

    assert(self->_publicKey == NULL);

    assert(self->_privateKey == NULL);

    // public key

    err = SecItemCopyMatching((__bridge CFDictionaryRef) @{

            (__bridge id) kSecClass:        (__bridge id) kSecClassKey,

            (__bridge id) kSecReturnRef:    (__bridge id) kCFBooleanTrue, 

            (__bridge id) kSecAttrKeyClass: (__bridge id) kSecAttrKeyClassPublic, 

            (__bridge id) kSecAttrKeyType:  (__bridge id) kSecAttrKeyTypeRSA,

            (__bridge id) kSecAttrLabel:                  @"Imported Public Key"

        }, 

        &matchResult

    );

    assert(err == errSecSuccess);

    assert(CFGetTypeID(matchResult) == SecKeyGetTypeID());

    self->_publicKey = (SecKeyRef) matchResult;

    CFRetain(self->_publicKey);

    CFRelease(matchResult);

    // private key

    err = SecItemCopyMatching((__bridge CFDictionaryRef) @{

            (__bridge id) kSecClass:        (__bridge id) kSecClassKey,

            (__bridge id) kSecReturnRef:    (__bridge id) kCFBooleanTrue, 

            (__bridge id) kSecAttrKeyClass: (__bridge id) kSecAttrKeyClassPrivate, 

            (__bridge id) kSecAttrKeyType:  (__bridge id) kSecAttrKeyTypeRSA,

            (__bridge id) kSecAttrLabel:                  @"Imported Private Key"

        }, 

        &matchResult

    );

    assert(err == errSecSuccess);

    assert(CFGetTypeID(matchResult) == SecKeyGetTypeID());

    self->_privateKey = (SecKeyRef) matchResult;

    CFRetain(self->_privateKey);

    CFRelease(matchResult);

    // Prior to OS X 10.8, the security transform used by QCCRSASmallCryptorT does not implement

    // the 'no padding' option (kSecPaddingNoneKey) <rdar://problem/9987765>.  If we're running on

    // such a system we just skip the tests that rely on this; otherwise the test log fills up

    // with reports of problems that we know about and can't find.

    //

    // Note that 12 is the Darwin major version for 10.8.

    self.rsaWithoutPaddingImplemented = YES;

    {

        int                 i;

        struct utsname      unameInfo;

        i = uname(&unameInfo);

        if (i >= 0) {

            i = atoi(unameInfo.release);

            if ( (i > 0) && (i < 12) ) {

                self.rsaWithoutPaddingImplemented = NO;

            }

        }

    }

}

- (void)tearDown

{

    if (self->_publicKey != NULL) {

        CFRelease(self->_publicKey);

        self->_publicKey = NULL;

    }

    if (self->_privateKey != NULL) {

        CFRelease(self->_privateKey);

        self->_privateKey = NULL;

    }

    [super tearDown];

}

- (BOOL)verifyFile:(NSString *)fileName

{

    NSData *            fileData;

    NSData *            signatureData;

    QCCRSASHA1VerifyT * op;

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:fileName withExtension:@"cer"]];

    assert(fileData != nil);

    signatureData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"test.cer" withExtension:@"sig"]];

    assert(signatureData != nil);

    op = [[QCCRSASHA1VerifyT alloc] initWithInputData:fileData publicKey:self.publicKey signatureData:signatureData];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    assert(op.error == nil);

    return op.verified;

}

- (void)testRSASHA1Verify

{

    STAssertTrue([self verifyFile:@"test"], @"");

    STAssertFalse([self verifyFile:@"test-corrupted"], @"");

}

- (void)testRSASHA1Sign

{

    NSData *            fileData;

    QCCRSASHA1SignT *   op;

    NSData *            expectedSignatureData;

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"test" withExtension:@"cer"]];

    assert(fileData != nil);

    expectedSignatureData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"test.cer" withExtension:@"sig"]];

    assert(expectedSignatureData != nil);

    op = [[QCCRSASHA1SignT alloc] initWithInputData:fileData privateKey:self.privateKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNil(op.error, @"");

    STAssertEqualObjects(op.signatureData, expectedSignatureData, @"");

}

- (void)testRSASmallCryptor

{

    NSData *                fileData;

    QCCRSASmallCryptorT *   op;

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"plaintext-32" withExtension:@"dat"]];

    assert(fileData != nil);

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:fileData key:self.publicKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNil(op.error, @"");

    if (op.smallOutputData != nil) {

        op = [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:op.smallOutputData key:self.privateKey];

        [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

        STAssertNil(op.error, @"");

        STAssertEqualObjects(fileData, op.smallOutputData, @"");

    }

}

// We can't test a fixed encryption in the padding case because the padding adds some 

// randomness so that no two encryptions are the same.

- (void)testRSADecrypt

{

    NSData *                fileData;

    QCCRSASmallCryptorT *   op;

    NSData *                cyphertext32Data;

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"plaintext-32" withExtension:@"dat"]];

    assert(fileData != nil);

    // This is the "plaintext-32.dat" data encrypted with the public key using the 

    // following OpenSSL command:

    //

    // $ openssl rsautl -encrypt -pkcs -pubin -inkey TestData/public.pem -in TestData/plaintext-32.dat

    cyphertext32Data = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"cyphertext-rsa-pkcs1-32" withExtension:@"dat"]];

    assert(cyphertext32Data != nil);

    op = [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:cyphertext32Data key:self.privateKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNil(op.error, @"");

    STAssertEqualObjects(fileData, op.smallOutputData, @"");

}

- (void)testRSAEncryptNoPad

{

    NSData *                fileData;

    QCCRSASmallCryptorT *   op;

    NSData *                cyphertext256Data;

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"plaintext-256" withExtension:@"dat"]];

    assert(fileData != nil);

    // This is the "plaintext-256.dat" data encrypted with the public key using the 

    // following OpenSSL command:

    //

    // $ openssl rsautl -encrypt -raw -pubin -inkey TestData/public.pem -in TestData/plaintext-256.dat

    cyphertext256Data = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"cyphertext-rsa-nopad-256" withExtension:@"dat"]];

    assert(cyphertext256Data != nil);

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:fileData key:self.publicKey];

    op.padding = kQCCRSASmallCryptorTPaddingNone;

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    if (self.rsaWithoutPaddingImplemented) {

        STAssertNil(op.error, @"");

        STAssertEqualObjects(op.smallOutputData, cyphertext256Data, @"");

    } else {

        STAssertNotNil(op.error, @"");

        STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

        STAssertEquals([op.error code], (NSInteger) CSSMERR_CSP_INVALID_ATTR_PADDING, @"");

        STAssertNil(op.smallOutputData, @"");

    }

}

- (void)testRSADecryptNoPad

{

    NSData *                fileData;

    QCCRSASmallCryptorT *   op;

    NSData *                cyphertext256Data;

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"plaintext-256" withExtension:@"dat"]];

    assert(fileData != nil);

    // This is the "plaintext-256.dat" data encrypted with the public key using the 

    // following OpenSSL command:

    //

    // $ openssl rsautl -encrypt -raw -pubin -inkey TestData/public.pem -in TestData/plaintext-256.dat

    cyphertext256Data = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"cyphertext-rsa-nopad-256" withExtension:@"dat"]];

    assert(cyphertext256Data != nil);

    op = [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:cyphertext256Data key:self.privateKey];

    op.padding = kQCCRSASmallCryptorTPaddingNone;

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    if (self.rsaWithoutPaddingImplemented) {

        STAssertNil(op.error, @"");

        STAssertEqualObjects(fileData, op.smallOutputData, @"");

    } else {

        STAssertNotNil(op.error, @"");

        STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

        STAssertEquals([op.error code], (NSInteger) CSSMERR_CSP_INVALID_ATTR_PADDING, @"");

        STAssertNil(op.smallOutputData, @"");

    }

}

- (void)testRSAVerifyError

{

    NSData *                fileData;

    NSData *                signatureData;

    QCCRSASHA1VerifyT *     op;

    // passing private key to verify

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"test" withExtension:@"cer"]];

    assert(fileData != nil);

    signatureData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"test.cer" withExtension:@"sig"]];

    assert(signatureData != nil);

    op = [[QCCRSASHA1VerifyT alloc] initWithInputData:fileData publicKey:self.privateKey signatureData:signatureData];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], @"Internal CSSM error", @"");

    STAssertEquals([op.error code], (NSInteger) CSSMERR_CSP_INVALID_KEY_CLASS, @"");

    STAssertFalse(op.verified, @"");        // this would be true if we'd passed in self.publicKey

    // passing public key to sign

}

- (void)testRSASignError

{

    NSData *                fileData;

    NSData *                expectedSignatureData;

    QCCRSASHA1SignT *       op;

    // Note: This test fails on OS X 10.7.x because the signing transform doesn't fail if

    // you pass it a public key; rather it succeeds, but produces gibberish results.

    // passing public key to sign

    fileData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"test" withExtension:@"cer"]];

    assert(fileData != nil);

    expectedSignatureData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"test.cer" withExtension:@"sig"]];

    assert(expectedSignatureData != nil);

    op = [[QCCRSASHA1SignT alloc] initWithInputData:fileData privateKey:self.publicKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], @"Internal CSSM error", @"");

    STAssertEquals([op.error code], (NSInteger) CSSMERR_CSP_INVALID_KEY_CLASS, @"");

    STAssertNil(op.signatureData, @"");

}

- (void)testRSACryptorError

{

    NSData *                plaintextData;

    NSData *                cyphertextData;

    QCCRSASmallCryptorT *   op;

    // encrypt with the private key

    plaintextData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"plaintext-32" withExtension:@"dat"]];

    assert(plaintextData != nil);

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:plaintextData key:self.privateKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

    STAssertEquals([op.error code], (NSInteger) CSSMERR_CSP_INVALID_KEY_CLASS, @"");

    STAssertNil(op.smallOutputData, @"");

    // decrypt with the public key

    cyphertextData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"cyphertext-rsa-pkcs1-32" withExtension:@"dat"]];

    assert(cyphertextData != nil);

    op = [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:cyphertextData key:self.publicKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

    STAssertEquals([op.error code], (NSInteger) CSSMERR_CSP_INVALID_KEY_CLASS, @"");

    STAssertNil(op.smallOutputData, @"");

    // padded encrypt too big

    plaintextData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"plaintext-332" withExtension:@"dat"]];

    assert(plaintextData != nil);

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:plaintextData key:self.publicKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

    STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

    STAssertNil(op.smallOutputData, @"");

    plaintextData = [plaintextData subdataWithRange:NSMakeRange(0, 256)];

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:plaintextData key:self.publicKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

    STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

    STAssertNil(op.smallOutputData, @"");

    plaintextData = [plaintextData subdataWithRange:NSMakeRange(0, 246)];

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:plaintextData key:self.publicKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

    STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

    STAssertNil(op.smallOutputData, @"");

    plaintextData = [plaintextData subdataWithRange:NSMakeRange(0, 245)];

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:plaintextData key:self.publicKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNil(op.error, @"");

    // raw encrypt wrong length

    plaintextData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"plaintext-256" withExtension:@"dat"]];

    assert(plaintextData != nil);

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:plaintextData key:self.publicKey];

    op.padding = kQCCRSASmallCryptorTPaddingNone;

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    if (self.rsaWithoutPaddingImplemented) {

        STAssertNil(op.error, @"");

    } else {

        STAssertNotNil(op.error, @"");

        STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

        STAssertEquals([op.error code], (NSInteger) CSSMERR_CSP_INVALID_ATTR_PADDING, @"");

        STAssertNil(op.smallOutputData, @"");

    }

    plaintextData = [plaintextData subdataWithRange:NSMakeRange(0, 255)];

    op = [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:plaintextData key:self.publicKey];

    op.padding = kQCCRSASmallCryptorTPaddingNone;

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    if (self.rsaWithoutPaddingImplemented) {

        STAssertNotNil(op.error, @"");

        STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

        STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

        STAssertNil(op.smallOutputData, @"");

    } else {

        STAssertNotNil(op.error, @"");

        STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

        STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

        STAssertNil(op.smallOutputData, @"");

    }

    // padded decrypt wrong length

    cyphertextData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"cyphertext-rsa-pkcs1-32" withExtension:@"dat"]];

    assert(cyphertextData != nil);

    cyphertextData = [cyphertextData subdataWithRange:NSMakeRange(0, 255)];

    op = [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:cyphertextData key:self.privateKey];

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    STAssertNotNil(op.error, @"");

    STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

    STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

    STAssertNil(op.smallOutputData, @"");

    // raw decrypt wrong length

    cyphertextData = [NSData dataWithContentsOfURL:[[NSBundle bundleForClass:[self class]] URLForResource:@"cyphertext-rsa-nopad-256" withExtension:@"dat"]];

    assert(cyphertextData != nil);

    cyphertextData = [cyphertextData subdataWithRange:NSMakeRange(0, 255)];

    op = [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:cyphertextData key:self.privateKey];

    op.padding = kQCCRSASmallCryptorTPaddingNone;

    [[ToolCommon sharedInstance] synchronouslyRunOperation:op];

    if (self.rsaWithoutPaddingImplemented) {

        STAssertNotNil(op.error, @"");

        STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

        STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

        STAssertNil(op.smallOutputData, @"");

    } else {

        STAssertNotNil(op.error, @"");

        STAssertEqualObjects([op.error domain], NSOSStatusErrorDomain, @"");

        STAssertEquals([op.error code], (NSInteger) errSecParam, @"");

        STAssertNil(op.smallOutputData, @"");

    }

}

- (void)testRSAThrows

{

    STAssertThrows((void) [[QCCRSASHA1VerifyT alloc] initWithInputData:nil publicKey:self.publicKey signatureData:[NSData data]], @"");

    STAssertThrows((void) [[QCCRSASHA1VerifyT alloc] initWithInputData:[NSData data] publicKey:NULL signatureData:[NSData data]], @"");

    STAssertThrows((void) [[QCCRSASHA1VerifyT alloc] initWithInputData:[NSData data] publicKey:self.publicKey signatureData:nil], @"");

    STAssertThrows((void) [[QCCRSASHA1SignT alloc] initWithInputData:nil privateKey:self.privateKey], @"");

    STAssertThrows((void) [[QCCRSASHA1SignT alloc] initWithInputData:[NSData data] privateKey:NULL], @"");

    STAssertThrows((void) [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:nil key:self.publicKey], @"");

    STAssertThrows((void) [[QCCRSASmallCryptorT alloc] initToDecryptSmallInputData:[NSData data] key:NULL], @"");

    STAssertThrows((void) [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:nil key:self.privateKey], @"");

    STAssertThrows((void) [[QCCRSASmallCryptorT alloc] initToEncryptSmallInputData:[NSData data] key:NULL], @"");

}

@end