Skip to content

Commit

Permalink
Checksum: Added CRC32b checksum matchers as well
Browse files Browse the repository at this point in the history
  • Loading branch information
Alexander Widerberg committed Feb 23, 2016
1 parent f836e21 commit 10c893a
Show file tree
Hide file tree
Showing 5 changed files with 180 additions and 14 deletions.
4 changes: 4 additions & 0 deletions Example/AWFileHash.xcodeproj/project.pbxproj
View file
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@

/* Begin PBXBuildFile section */
0ECAB226AB051575F119616F /* Pods_AWFileHash.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3141166B67CA9BBD75A096F0 /* Pods_AWFileHash.framework */; };
3B15E4D11C7C9303007C9227 /* flower2.jpg in Resources */ = {isa = PBXBuildFile; fileRef = 3B15E4D01C7C9303007C9227 /* flower2.jpg */; };
6003F5B0195388D20070C39A /* XCTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F5AF195388D20070C39A /* XCTest.framework */; };
6003F5B1195388D20070C39A /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F58D195388D20070C39A /* Foundation.framework */; };
6003F5B2195388D20070C39A /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6003F591195388D20070C39A /* UIKit.framework */; };
Expand All @@ -20,6 +21,7 @@
02C11E145DFE885122DC5C06 /* Pods-AWFileHash.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-AWFileHash.debug.xcconfig"; path = "Pods/Target Support Files/Pods-AWFileHash/Pods-AWFileHash.debug.xcconfig"; sourceTree = "<group>"; };
2F0E79FC4148DFEB572350D1 /* Pods-AWFileHash.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-AWFileHash.release.xcconfig"; path = "Pods/Target Support Files/Pods-AWFileHash/Pods-AWFileHash.release.xcconfig"; sourceTree = "<group>"; };
3141166B67CA9BBD75A096F0 /* Pods_AWFileHash.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_AWFileHash.framework; sourceTree = BUILT_PRODUCTS_DIR; };
3B15E4D01C7C9303007C9227 /* flower2.jpg */ = {isa = PBXFileReference; lastKnownFileType = image.jpeg; name = flower2.jpg; path = Graphics/flower2.jpg; sourceTree = "<group>"; };
4DFD4CF296B63FA3D0CF1586 /* AWFileHash.podspec */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text; name = AWFileHash.podspec; path = ../AWFileHash.podspec; sourceTree = "<group>"; };
4E77FFD8D25E38CAB6651D7B /* README.md */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = net.daringfireball.markdown; name = README.md; path = ../README.md; sourceTree = "<group>"; };
6003F58A195388D20070C39A /* AWFileHash.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = AWFileHash.app; sourceTree = BUILT_PRODUCTS_DIR; };
Expand Down Expand Up @@ -126,6 +128,7 @@
isa = PBXGroup;
children = (
8566F2FC1A93533E00023721 /* flower.png */,
3B15E4D01C7C9303007C9227 /* flower2.jpg */,
);
name = Resources;
sourceTree = "<group>";
Expand Down Expand Up @@ -191,6 +194,7 @@
isa = PBXResourcesBuildPhase;
buildActionMask = 2147483647;
files = (
3B15E4D11C7C9303007C9227 /* flower2.jpg in Resources */,
8566F2FD1A93533E00023721 /* flower.png in Resources */,
6003F5BA195388D20070C39A /* InfoPlist.strings in Resources */,
);
Expand Down
51 changes: 38 additions & 13 deletions Example/Tests/Tests.m
View file
Original file line number Diff line number Diff line change
Expand Up @@ -12,55 +12,80 @@

describe(@"these should pass", ^{
__block NSData* _data = nil;
__block NSData* _data2 = nil;
__block NSString* _filePath = nil;

__block NSString* _filePath2 = nil;

beforeAll(^{
// Setup test NSData
_data = [NSData dataWithBytes:"AWFileHash" length:10];

_data = [NSData dataWithBytes:"AWFileHash" length:10];

_data2 = [NSData dataWithBytes:"a short test!" length:13];

// Fetch the test file path
NSString *mainBundlePath = [[NSBundle bundleForClass:[self class]] resourcePath];
NSBundle *mainBundle = [NSBundle bundleWithPath:mainBundlePath];
_filePath = [mainBundle pathForResource:@"flower" ofType:@"png"];
_filePath = [mainBundle pathForResource:@"flower" ofType:@"png"];
_filePath2 = [mainBundle pathForResource:@"flower2" ofType:@"jpg"];
});

beforeEach(^{
});

// NSData tests
it(@"can calculate MD5 of nsdata", ^{
expect([AWFileHash md5HashOfData:_data]).to.equal(@"f8b38b91e8972b2cffcf46723c755089");
});

it(@"can not calculate MD5 of nsdata", ^{
expect([AWFileHash md5HashOfData:nil]).notTo.equal(@"f8b38b91e8972b2cffcf46723c755089");
});

it(@"can not calculate MD5 of nsdata", ^{
expect([AWFileHash md5HashOfData:_data]).notTo.equal(@"f8b38b91e8972b2cffcf46723c75508a");
});

it(@"can calculate SHA1 of nsdata", ^{
expect([AWFileHash sha1HashOfData:_data]).to.equal(@"e100884df5826e4e2c36f784521f7b4c74809082");
});

it(@"can calculate SHA512 of nsdata", ^{
expect([AWFileHash sha512HashOfData:_data]).to.equal(@"a83343a46aabc469e12483ec6f4a4620516b50ad2a810226270e7efa4851e8f69065a47b6c6eeee8ed9006361f79665cfa0e481ae69ef873b55653220b0a578a");
});


it(@"can calculate CRC32b of nsdata", ^{
expect([AWFileHash crc32HashOfData:_data]).to.equal(@"0b37cf8d");
});

it(@"can calculate CRC32b of nsdata", ^{
expect([AWFileHash crc32HashOfData:_data2]).to.equal(@"42d3fcda");
});

// File tests
it(@"can calculate MD5 of FileAtPath", ^{
expect([AWFileHash md5HashOfFileAtPath:_filePath]).to.equal(@"e2b73ef09ebf853047fe1dcb6ad0862a");
});

it(@"can calculate SHA1 of FileAtPath", ^{
expect([AWFileHash sha1HashOfFileAtPath:_filePath]).to.equal(@"91f90cc1f585fb6ebe6980954a33e2da27257edf");
});

it(@"can calculate SHA512 of FileAtPath", ^{
expect([AWFileHash sha512HashOfFileAtPath:_filePath]).to.equal(@"a428ad0b1ef9b09b2c7477cce93b0ccd052c70423810778f042dc003c1941129c54d4e82d11b76dad2dddd881cd6fda0063a57793ea95aafcb54a57721391a57");
});


it(@"can calculate CRC32b of FileAtPath", ^{
expect([AWFileHash crc32HashOfFileAtPath:_filePath2]).to.equal(@"0e1e69c0");
});

afterEach(^{
});

afterAll(^{
_data = nil;
_filePath = nil;
});

});

SpecEnd
5 changes: 5 additions & 0 deletions Pod/Classes/AWFileHash.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -17,10 +17,15 @@
+ (NSString *)md5HashOfData:(NSData *)data;
+ (NSString *)sha1HashOfData:(NSData *)data;
+ (NSString *)sha512HashOfData:(NSData *)data;
+ (NSString *)crc32HashOfData:(NSData *)data;

+ (NSString *)md5HashOfFileAtPath:(NSString *)filePath;
+ (NSString *)sha1HashOfFileAtPath:(NSString *)filePath;
+ (NSString *)sha512HashOfFileAtPath:(NSString *)filePath;
+ (NSString *)crc32HashOfFileAtPath:(NSString *)filePath;

+ (NSString *)md5HashOfALAssetRepresentation:(ALAssetRepresentation *)alAssetRep;

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
+ (NSString *)md5HashOfPHAsset:(PHAsset *)phAsset;
#endif
Expand Down
134 changes: 133 additions & 1 deletion Pod/Classes/AWFileHash.m
View file
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@


// Constants
static const size_t FileHashDefaultChunkSizeForReadingData = 256000; // 250kB buffer size
static const size_t FileHashDefaultChunkSizeForReadingData = 4096; // in bytes

// Function pointer types for functions used in the computation
// of a cryptographic hash.
Expand All @@ -44,6 +44,108 @@
context.digestLength = CC_##hashAlgorithmName##_DIGEST_LENGTH; \
context.hashObjectPointer = (uint8_t **)&hashObjectFor##hashAlgorithmName

#pragma mark -
#pragma CRC32b implementation

typedef struct {
CC_LONG crc;
} CC_CRC32_CTX;

static int CC_CRC32_Init(CC_CRC32_CTX *c);
static int CC_CRC32_Update(CC_CRC32_CTX *c, const uint8_t *data, CC_LONG len);
static int CC_CRC32_Final(unsigned char *md, CC_CRC32_CTX *c);

#define CC_CRC32_DIGEST_LENGTH 4

static CC_LONG crc32_tbl[256] =
{
0x00000000L, 0x77073096L, 0xEE0E612CL, 0x990951BAL, 0x076DC419L,
0x706AF48FL, 0xE963A535L, 0x9E6495A3L, 0x0EDB8832L, 0x79DCB8A4L,
0xE0D5E91EL, 0x97D2D988L, 0x09B64C2BL, 0x7EB17CBDL, 0xE7B82D07L,
0x90BF1D91L, 0x1DB71064L, 0x6AB020F2L, 0xF3B97148L, 0x84BE41DEL,
0x1ADAD47DL, 0x6DDDE4EBL, 0xF4D4B551L, 0x83D385C7L, 0x136C9856L,
0x646BA8C0L, 0xFD62F97AL, 0x8A65C9ECL, 0x14015C4FL, 0x63066CD9L,
0xFA0F3D63L, 0x8D080DF5L, 0x3B6E20C8L, 0x4C69105EL, 0xD56041E4L,
0xA2677172L, 0x3C03E4D1L, 0x4B04D447L, 0xD20D85FDL, 0xA50AB56BL,
0x35B5A8FAL, 0x42B2986CL, 0xDBBBC9D6L, 0xACBCF940L, 0x32D86CE3L,
0x45DF5C75L, 0xDCD60DCFL, 0xABD13D59L, 0x26D930ACL, 0x51DE003AL,
0xC8D75180L, 0xBFD06116L, 0x21B4F4B5L, 0x56B3C423L, 0xCFBA9599L,
0xB8BDA50FL, 0x2802B89EL, 0x5F058808L, 0xC60CD9B2L, 0xB10BE924L,
0x2F6F7C87L, 0x58684C11L, 0xC1611DABL, 0xB6662D3DL, 0x76DC4190L,
0x01DB7106L, 0x98D220BCL, 0xEFD5102AL, 0x71B18589L, 0x06B6B51FL,
0x9FBFE4A5L, 0xE8B8D433L, 0x7807C9A2L, 0x0F00F934L, 0x9609A88EL,
0xE10E9818L, 0x7F6A0DBBL, 0x086D3D2DL, 0x91646C97L, 0xE6635C01L,
0x6B6B51F4L, 0x1C6C6162L, 0x856530D8L, 0xF262004EL, 0x6C0695EDL,
0x1B01A57BL, 0x8208F4C1L, 0xF50FC457L, 0x65B0D9C6L, 0x12B7E950L,
0x8BBEB8EAL, 0xFCB9887CL, 0x62DD1DDFL, 0x15DA2D49L, 0x8CD37CF3L,
0xFBD44C65L, 0x4DB26158L, 0x3AB551CEL, 0xA3BC0074L, 0xD4BB30E2L,
0x4ADFA541L, 0x3DD895D7L, 0xA4D1C46DL, 0xD3D6F4FBL, 0x4369E96AL,
0x346ED9FCL, 0xAD678846L, 0xDA60B8D0L, 0x44042D73L, 0x33031DE5L,
0xAA0A4C5FL, 0xDD0D7CC9L, 0x5005713CL, 0x270241AAL, 0xBE0B1010L,
0xC90C2086L, 0x5768B525L, 0x206F85B3L, 0xB966D409L, 0xCE61E49FL,
0x5EDEF90EL, 0x29D9C998L, 0xB0D09822L, 0xC7D7A8B4L, 0x59B33D17L,
0x2EB40D81L, 0xB7BD5C3BL, 0xC0BA6CADL, 0xEDB88320L, 0x9ABFB3B6L,
0x03B6E20CL, 0x74B1D29AL, 0xEAD54739L, 0x9DD277AFL, 0x04DB2615L,
0x73DC1683L, 0xE3630B12L, 0x94643B84L, 0x0D6D6A3EL, 0x7A6A5AA8L,
0xE40ECF0BL, 0x9309FF9DL, 0x0A00AE27L, 0x7D079EB1L, 0xF00F9344L,
0x8708A3D2L, 0x1E01F268L, 0x6906C2FEL, 0xF762575DL, 0x806567CBL,
0x196C3671L, 0x6E6B06E7L, 0xFED41B76L, 0x89D32BE0L, 0x10DA7A5AL,
0x67DD4ACCL, 0xF9B9DF6FL, 0x8EBEEFF9L, 0x17B7BE43L, 0x60B08ED5L,
0xD6D6A3E8L, 0xA1D1937EL, 0x38D8C2C4L, 0x4FDFF252L, 0xD1BB67F1L,
0xA6BC5767L, 0x3FB506DDL, 0x48B2364BL, 0xD80D2BDAL, 0xAF0A1B4CL,
0x36034AF6L, 0x41047A60L, 0xDF60EFC3L, 0xA867DF55L, 0x316E8EEFL,
0x4669BE79L, 0xCB61B38CL, 0xBC66831AL, 0x256FD2A0L, 0x5268E236L,
0xCC0C7795L, 0xBB0B4703L, 0x220216B9L, 0x5505262FL, 0xC5BA3BBEL,
0xB2BD0B28L, 0x2BB45A92L, 0x5CB36A04L, 0xC2D7FFA7L, 0xB5D0CF31L,
0x2CD99E8BL, 0x5BDEAE1DL, 0x9B64C2B0L, 0xEC63F226L, 0x756AA39CL,
0x026D930AL, 0x9C0906A9L, 0xEB0E363FL, 0x72076785L, 0x05005713L,
0x95BF4A82L, 0xE2B87A14L, 0x7BB12BAEL, 0x0CB61B38L, 0x92D28E9BL,
0xE5D5BE0DL, 0x7CDCEFB7L, 0x0BDBDF21L, 0x86D3D2D4L, 0xF1D4E242L,
0x68DDB3F8L, 0x1FDA836EL, 0x81BE16CDL, 0xF6B9265BL, 0x6FB077E1L,
0x18B74777L, 0x88085AE6L, 0xFF0F6A70L, 0x66063BCAL, 0x11010B5CL,
0x8F659EFFL, 0xF862AE69L, 0x616BFFD3L, 0x166CCF45L, 0xA00AE278L,
0xD70DD2EEL, 0x4E048354L, 0x3903B3C2L, 0xA7672661L, 0xD06016F7L,
0x4969474DL, 0x3E6E77DBL, 0xAED16A4AL, 0xD9D65ADCL, 0x40DF0B66L,
0x37D83BF0L, 0xA9BCAE53L, 0xDEBB9EC5L, 0x47B2CF7FL, 0x30B5FFE9L,
0xBDBDF21CL, 0xCABAC28AL, 0x53B39330L, 0x24B4A3A6L, 0xBAD03605L,
0xCDD70693L, 0x54DE5729L, 0x23D967BFL, 0xB3667A2EL, 0xC4614AB8L,
0x5D681B02L, 0x2A6F2B94L, 0xB40BBE37L, 0xC30C8EA1L, 0x5A05DF1BL,
0x2D02EF8DL
};

int CC_CRC32_Init(CC_CRC32_CTX *c) {
c->crc = 0xFFFFFFFFL;
return 0;
}

int CC_CRC32_Update(CC_CRC32_CTX *c, const uint8_t *data, CC_LONG len) {
CC_LONG crc = c->crc;

for(CC_LONG i=0; i<len;i++) {
crc = (crc>>8) ^ crc32_tbl[(crc&0xFF) ^ *data++];
}

c->crc = crc;

return 0;
}

int CC_CRC32_Final(unsigned char *md, CC_CRC32_CTX *c) {
CC_LONG crc = c->crc;

crc = crc ^ 0xFFFFFFFFL;

md[0] = (crc & 0xff000000UL) >> 24;
md[1] = (crc & 0x00ff0000UL) >> 16;
md[2] = (crc & 0x0000ff00UL) >> 8;
md[3] = (crc & 0x000000ffUL) ;

return 0;
}

#pragma mark -
#pragma Begin implementation

@implementation AWFileHash

#pragma mark -
Expand Down Expand Up @@ -264,6 +366,12 @@ + (NSString *)sha512HashOfData:(NSData *)data {
return [self hashOfNSData:data withComputationContext:&context];
}

+ (NSString *)crc32HashOfData:(NSData *)data {
FileHashComputationContext context;
FileHashComputationContextInitialize(context, CRC32);
return [self hashOfNSData:data withComputationContext:&context];
}

+ (NSString *)md5HashOfFileAtPath:(NSString *)filePath {
FileHashComputationContext context;
FileHashComputationContextInitialize(context, MD5);
Expand All @@ -282,12 +390,36 @@ + (NSString *)sha512HashOfFileAtPath:(NSString *)filePath {
return [self hashOfFileAtPath:filePath withComputationContext:&context];
}

+ (NSString *)crc32HashOfFileAtPath:(NSString *)filePath {
FileHashComputationContext context;
FileHashComputationContextInitialize(context, CRC32);
return [self hashOfFileAtPath:filePath withComputationContext:&context];
}

+ (NSString *)md5HashOfALAssetRepresentation:(ALAssetRepresentation *)alAssetRep {
FileHashComputationContext context;
FileHashComputationContextInitialize(context, MD5);
return [self hashOfALAssetRepresentation:alAssetRep withComputationContext:&context];
}

+ (NSString *)sha1HashOfALAssetRepresentation:(ALAssetRepresentation *)alAssetRep {
FileHashComputationContext context;
FileHashComputationContextInitialize(context, SHA1);
return [self hashOfALAssetRepresentation:alAssetRep withComputationContext:&context];
}

+ (NSString *)sha512HashOfALAssetRepresentation:(ALAssetRepresentation *)alAssetRep {
FileHashComputationContext context;
FileHashComputationContextInitialize(context, SHA512);
return [self hashOfALAssetRepresentation:alAssetRep withComputationContext:&context];
}

+ (NSString *)crc32HashOfALAssetRepresentation:(ALAssetRepresentation *)alAssetRep {
FileHashComputationContext context;
FileHashComputationContextInitialize(context, CRC32);
return [self hashOfALAssetRepresentation:alAssetRep withComputationContext:&context];
}

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
// This will have a much higher memory impact than ALAsset
+ (NSString *)md5HashOfPHAsset:(PHAsset *)phAsset {
Expand Down
Empty file added Pod/Classes/crc.h
View file
Empty file.

0 comments on commit 10c893a

Please sign in to comment.