Objective-C Implicit conversion loses integer precision (size_t to CC_Long)

Question

I have a function that\'s generating a sha256 encryption of a string,

Here\'s the function:

    -(NSString*)sha256HashFor:(NSString*)input
{
    const ch         


        

Answer 1

This code will not show any warning and works perfectly.

- (NSString*) sha256 {
    const char * pointer = [self UTF8String];
    unsigned char result[CC_SHA256_DIGEST_LENGTH];
    CC_SHA256(pointer, (CC_LONG)strlen(pointer), result);

    NSMutableString *ret = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH*2];
    for(int i = 0; i