iOS开发之Objective-c的SHA224SHA256SHA384SHA512加密算法的实现

之前在博文中实现的SHA1的安全性已经满足不了用户需求，今天把SHA224/SHA256/SHA384/SHA512的实现一并附上。 SHA即Secure Hash Algorithm（安全散列算法)有多种不同位数的实现，常见的有SHA224/SHA256/SHA384/SHA512等 SHA224: - (NSString*) sha224{ const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *data = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA224_DIGEST_LENGTH]; CC_SHA224(data.bytes, data.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA224_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output;} SHA256: - (NSString*) sha256{ const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *data = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA256_DIGEST_LENGTH]; CC_SHA256(data.bytes, data.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output;} SHA384: - (NSString*) sha384{ const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *data = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA384_DIGEST_LENGTH]; CC_SHA384(data.bytes, data.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA384_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output;} SHA512: - (NSString*) sha512{ const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *data = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA512_DIGEST_LENGTH]; CC_SHA512(data.bytes, data.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output;} 放到一起大团结 ////NSString+SHA.h//#import #imp ort #imp ort @interface NSString(SHA) -(NSString *) sha1; -(NSString *) sha224; -(NSString *) sha256; -(NSString *) sha384; -(NSString *) sha512; @end // //NSString+SHA.m // #imp ort "NSString+SHA.h" @implementation NSString(SHA) - (NSString*) sha1 { const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *da ta = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA1_DIGEST_LENGTH]; CC_SHA1(da ta.bytes, da ta.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output; } - (NSString*) sha224 { const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *da ta = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA224_DIGEST_LENGTH]; CC_SHA224(da ta.bytes, da ta.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA224_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output; } - (NSString*) sha256 { const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *da ta = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA256_DIGEST_LENGTH]; CC_SHA256(da ta.bytes, da ta.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output; } - (NSString*) sha384 { const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *da ta = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA384_DIGEST_LENGTH]; CC_SHA384(da ta.bytes, da ta.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA384_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output; } - (NSString*) sha512 { const char *cstr = [self cStringUsingEncoding:NSUTF8StringEncoding]; NSData *da ta = [NSData dataWithBytes:cstr length:self.length]; uint8_t digest[CC_SHA512_DIGEST_LENGTH]; CC_SHA512(da ta.bytes, da ta.length, digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2]; for(int i = 0; i < CC SHA_DIGEST_LENGTH ibr> [output appendFormat:@"%02x", digest[i]]; return output; }