這裏封裝的是iOS使用到的各種加密方法,MD5加密,AES加密,Base64加密,DES加密,生成32UUID,類需要繼承
<Foundation/Foundation.h>框架
注意:.m文件需要導入
#import <CommonCrypto/CommonDigest.h>
#import <CommonCrypto/CommonCryptor.h>
.h文件實現接口:
/**
* 生成32位UUID,不帶'-'
*
* @return 32位UUID
*/
+ (NSString *)createUUID;
#pragma mark - MD5
/**
* md5加密
*
* @param str 要加密的字符串
*
* @return 32位md5字符串
*/
+ (NSString *)md5:(NSString *)input;
#pragma mark - SHA
/**
* sha1加密
*
* @param input 要加密的字符串
*
* @return 加密後的字符串
*/
+ (NSString *)sha1:(NSString *)input;
+ (NSString *)sha224:(NSString *)input;
+ (NSString *)sha256:(NSString *)input;
+ (NSString *)sha384:(NSString *)input;
+ (NSString *)sha512:(NSString *)input;
#pragma mark - DES
/**
* DES加密
*
* @param key 密鑰
* @param data 加密數據
*
* @return 加密後的數據
*/
+ (NSData *)DESEncryptWithKey:(NSString *)key data:(NSData *)data;
/**
* DES解密
*
* @param key 密鑰
* @param data 解密數據
*
* @return 解密後的數據
*/
+ (NSData *)DESDecryptWithKey:(NSString *)key data:(NSData *)data;
#pragma mark - AES
/**
* AES256加密
*
* @param key 密鑰
* @param data 加密數據
*
* @return 加密後的數據
*/
+ (NSData *)AES256EncryptWithKey:(NSString *)key data:(NSData *)data;
/**
* AES256解密
*
* @param key 密鑰
* @param data 解密數據
*
* @return 解密後的數據
*/
+ (NSData *)AES256DecryptWithKey:(NSString *)key data:(NSData *)data;
#pragma mark - Base64
/**
* NSData轉Base64
*
* @param data
*
* @return
*/
+ (NSString *)base64EncodedStringWithData:(NSData *)data;
/**
* Base64轉NSData
*
* @param base64String
*
* @return
*/
+ (NSData *)dataWithBase64EncodedString:(NSString *)base64String;
/**
* NSString轉Base64
*
* @param string
*
* @return
*/
+ (NSString *)base64EncodedString:(NSString *)string;
/**
* Base64轉NSString
*
* @param base64String base64字符串
*
* @return
*/
+ (NSString *)stringWithBase64Encoded:(NSString *)base64String;
.m文件實現接口:
static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ (NSString *)createUUID
{
NSUUID *uuid = [NSUUID UUID];
return [[uuid UUIDString] stringByReplacingOccurrencesOfString:@"-" withString:@""];
}
#pragma mark - MD5
+ (NSString *)md5:(NSString *)input
{
const char *cStrValue = [input UTF8String];
if (cStrValue == NULL) {
cStrValue = "";
}
unsigned char r[CC_MD5_DIGEST_LENGTH];
CC_MD5(cStrValue, (CC_LONG)strlen(cStrValue), r);
return [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
r[0], r[1], r[2], r[3], r[4], r[5], r[6], r[7], r[8], r[9], r[10], r[11], r[12], r[13], r[14], r[15]];
}
#pragma mark - SHA1
+ (NSString *)sha1:(NSString *)input
{
const char *ptr = [input UTF8String];
int i =0;
int len = (int)strlen(ptr);
Byte byteArray[len];
while (i!=len)
{
unsigned eachChar = *(ptr + i);
unsigned low8Bits = eachChar & 0xFF;
byteArray[i] = low8Bits;
i++;
}
unsigned char digest[CC_SHA1_DIGEST_LENGTH];
CC_SHA1(byteArray, len, digest);
NSMutableString *hex = [NSMutableString string];
for (int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++) {
[hex appendFormat:@"%02x", digest[i]];
}
NSString *immutableHex = [NSString stringWithString:hex];
return immutableHex;
}
+ (NSString *)sha224:(NSString *)input
{
const char *cstr = [input cStringUsingEncoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithBytes:cstr length:input.length];
uint8_t digest[CC_SHA224_DIGEST_LENGTH];
CC_SHA224(data.bytes, (CC_LONG)data.length, digest);
NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA224_DIGEST_LENGTH * 2];
for(int i = 0; i < CC_SHA224_DIGEST_LENGTH; i++) {
[output appendFormat:@"%02x", digest[i]];
}
return output;
}
+ (NSString *)sha256:(NSString *)input
{
const char *cstr = [input cStringUsingEncoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithBytes:cstr length:input.length];
uint8_t digest[CC_SHA256_DIGEST_LENGTH];
CC_SHA256(data.bytes, (CC_LONG)data.length, digest);
NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH * 2];
for(int i = 0; i < CC_SHA256_DIGEST_LENGTH; i++) {
[output appendFormat:@"%02x", digest[i]];
}
return output;
}
+ (NSString *)sha384:(NSString *)input
{
const char *cstr = [input cStringUsingEncoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithBytes:cstr length:input.length];
uint8_t digest[CC_SHA384_DIGEST_LENGTH];
CC_SHA384(data.bytes, (CC_LONG)data.length, digest);
NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA384_DIGEST_LENGTH * 2];
for(int i = 0; i < CC_SHA384_DIGEST_LENGTH; i++) {
[output appendFormat:@"%02x", digest[i]];
}
return output;
}
+ (NSString *)sha512:(NSString *)input
{
const char *cstr = [input cStringUsingEncoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithBytes:cstr length:input.length];
uint8_t digest[CC_SHA512_DIGEST_LENGTH];
CC_SHA512(data.bytes, (CC_LONG)data.length, digest);
NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2];
for(int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++) {
[output appendFormat:@"%02x", digest[i]];
}
return output;
}
#pragma mark - DES
+ (NSData *)DESEncryptWithKey:(NSString *)key data:(NSData *)data
{
char keyPtr[kCCKeySizeAES256+1];
bzero(keyPtr, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmDES,
kCCOptionPKCS7Padding | kCCOptionECBMode,
keyPtr, kCCBlockSizeDES,
NULL,
[data bytes], dataLength,
buffer, bufferSize,
&numBytesEncrypted);
if (cryptStatus == kCCSuccess) {
return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
}
free(buffer);
return nil;
}
+ (NSData *)DESDecryptWithKey:(NSString *)key data:(NSData *)data
{
char keyPtr[kCCKeySizeAES256+1];
bzero(keyPtr, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesDecrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmDES,
kCCOptionPKCS7Padding | kCCOptionECBMode,
keyPtr, kCCBlockSizeDES,
NULL,
[data bytes], dataLength,
buffer, bufferSize,
&numBytesDecrypted);
if (cryptStatus == kCCSuccess) {
return [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted];
}
free(buffer);
return nil;
}
#pragma mark - AES256
+ (NSData *)AES256EncryptWithKey:(NSString *)key data:(NSData *)data
{
char keyPtr[kCCKeySizeAES256 + 1];
bzero(keyPtr, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesDecrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128,
kCCOptionPKCS7Padding, keyPtr,
kCCKeySizeAES256, NULL,
[data bytes], dataLength,
buffer, bufferSize,
&numBytesDecrypted);
if (cryptStatus == kCCSuccess) {
return [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted];
}
free(buffer);
return nil;
}
+ (NSData *)AES256DecryptWithKey:(NSString *)key data:(NSData *)data
{
char keyPtr[kCCKeySizeAES256 + 1];
bzero(keyPtr, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesDecrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128,
kCCOptionPKCS7Padding, keyPtr,
kCCKeySizeAES256, NULL,
[data bytes], dataLength,
buffer, bufferSize,
&numBytesDecrypted);
if (cryptStatus == kCCSuccess) {
return [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted];
}
free(buffer);
return nil;
}
#pragma mark - Base64
+ (NSString *)base64EncodedStringWithData:(NSData *)data
{
if ([data length] < 1) {
return nil;
}
char *characters = malloc((([data length] + 2) / 3) * 4);
if (characters == NULL)
return nil;
NSUInteger length = 0;
NSUInteger i = 0;
while (i < [data length])
{
char buffer[3] = {0,0,0};
short bufferLength = 0;
while (bufferLength < 3 && i < [data length])
buffer[bufferLength++] = ((char *)[data bytes])[i++];
// Encode the bytes in the buffer to four characters, including padding "=" characters if necessary.
characters[length++] = encodingTable[(buffer[0] & 0xFC) >> 2];
characters[length++] = encodingTable[((buffer[0] & 0x03) << 4) | ((buffer[1] & 0xF0) >> 4)];
if (bufferLength > 1)
characters[length++] = encodingTable[((buffer[1] & 0x0F) << 2) | ((buffer[2] & 0xC0) >> 6)];
else characters[length++] = '=';
if (bufferLength > 2)
characters[length++] = encodingTable[buffer[2] & 0x3F];
else characters[length++] = '=';
}
return [[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSASCIIStringEncoding freeWhenDone:YES];
}
+ (NSData *)dataWithBase64EncodedString:(NSString *)base64String
{
if (base64String.length < 1) {
return nil;
}
static char *decodingTable = NULL;
if (decodingTable == NULL)
{
decodingTable = malloc(256);
if (decodingTable == NULL)
return nil;
memset(decodingTable, CHAR_MAX, 256);
NSUInteger i;
for (i = 0; i < 64; i++)
decodingTable[(short)encodingTable[i]] = i;
}
const char *characters = [base64String cStringUsingEncoding:NSASCIIStringEncoding];
if (characters == NULL) // Not an ASCII string!
return nil;
char *bytes = malloc((([base64String length] + 3) / 4) * 3);
if (bytes == NULL)
return nil;
NSUInteger length = 0;
NSUInteger i = 0;
while (YES)
{
char buffer[4];
short bufferLength;
for (bufferLength = 0; bufferLength < 4; i++)
{
if (characters[i] == '\0')
break;
if (isspace(characters[i]) || characters[i] == '=')
continue;
buffer[bufferLength] = decodingTable[(short)characters[i]];
if (buffer[bufferLength++] == CHAR_MAX) // Illegal character!
{
free(bytes);
return nil;
}
}
if (bufferLength == 0)
break;
if (bufferLength == 1) // At least two characters are needed to produce one byte!
{
free(bytes);
return nil;
}
// Decode the characters in the buffer to bytes.
bytes[length++] = (buffer[0] << 2) | (buffer[1] >> 4);
if (bufferLength > 2)
bytes[length++] = (buffer[1] << 4) | (buffer[2] >> 2);
if (bufferLength > 3)
bytes[length++] = (buffer[2] << 6) | buffer[3];
}
bytes = realloc(bytes, length);
return [NSData dataWithBytesNoCopy:bytes length:length];
}
+ (NSString *)base64EncodedString:(NSString *)string
{
return [self base64EncodedStringWithData:[string dataUsingEncoding:NSUTF8StringEncoding]];
}
+ (NSString *)stringWithBase64Encoded:(NSString *)base64String
{
return [[NSString alloc] initWithData:[self dataWithBase64EncodedString:base64String] encoding:NSUTF8StringEncoding];
}