内容包含MD5、SHA1、SHA256、base64、DES、AES1228、AES256加密
使用之前需要引入头文件:
#import <CommonCrypto/CommonCrypto.h>
定义如下常量留作备用：
const Byte iv2[] = {1,2,3,4,5,6,7,8};
MD5加密
+ (NSString *)encryptMD5With:(NSString *)string
{
const char *cStr = [string UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5(cStr, (int)strlen(cStr), result);
NSMutableString *md5String = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH*2];
for (NSInteger i = 0; i < CC_MD5_DIGEST_LENGTH; i++) {
[md5String appendFormat:@"%02x", result[i]];
}
return md5String;
}
SHA1加密
+ (NSString *)encryptSHA1With:(NSString *)string
{
const char *cstr = [string cStringUsingEncoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithBytes:cstr length:string.length];
uint8_t digest[CC_SHA1_DIGEST_LENGTH];
CC_SHA1(data.bytes, (uint32_t)data.length, digest);
NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];
for(int i=0; i<CC_SHA1_DIGEST_LENGTH; i++) {
[output appendFormat:@"%02x", digest[i]];
}
return output;
}
SHA256加密
+ (NSString *)encryptSHA256With:(NSString *)string
{
const char *str = [string cStringUsingEncoding:NSUTF8StringEncoding];
unsigned char result[CC_SHA256_DIGEST_LENGTH];
CC_SHA256(str, (CC_LONG)strlen(str), result);
NSMutableString *ret = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH*2];
for(int i = 0; i<CC_SHA256_DIGEST_LENGTH; i++)
{
[ret appendFormat:@"%02x",result[i]];
}
return ret;
}
base64
编码
+ (NSString*)encodeBase64String:(NSString * )string
{
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
NSString *base64String = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
return base64String;
}
解码：
+ (NSString*)decodeBase64String:(NSString * )string
{
NSData *data = [[NSData alloc] initWithBase64EncodedString:string options:NSDataBase64DecodingIgnoreUnknownCharacters];
NSString *base64DecodeStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
return base64DecodeStr;
}
DES
加密：
+ (NSString *)encryptDESWith:(NSString *)string key:(NSString *)key
{
NSData *textData = [string dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
NSUInteger dataLength = [textData length];
unsigned char buffer[1024];
memset(buffer, 0, sizeof(char));
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmDES,
kCCOptionPKCS7Padding|kCCOptionECBMode,
[key UTF8String],
kCCKeySizeDES,
iv2,
[textData bytes],
dataLength,
buffer,
1024,
&numBytesEncrypted);
NSString *encryptText = nil;
if (cryptStatus == kCCSuccess) {
NSData *data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesEncrypted];
encryptText = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
}
return encryptText;
}
解密：
+ (NSString *)decryptDESWith:(NSString *)string key:(NSString *)key
{
NSData *cipherData = [[NSData alloc] initWithBase64EncodedString:string options:NSDataBase64DecodingIgnoreUnknownCharacters];
unsigned char buffer[1024];
memset(buffer, 0, sizeof(char));
size_t numBytesDecrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
kCCAlgorithmDES,
kCCOptionPKCS7Padding|kCCOptionECBMode,
[key UTF8String],
kCCKeySizeDES,
iv2,
[cipherData bytes],
[cipherData length],
buffer,
1024,
&numBytesDecrypted);
NSString *decryptText = nil;
if (cryptStatus == kCCSuccess) {
NSData* data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesDecrypted];
decryptText = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}
return decryptText;
}
AES128
加密：
+ (NSString *)encryptAES128With:(NSString *)string key:(NSString *)key
{
char keyPtr[kCCKeySizeAES128+1];
memset(keyPtr, 0, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSData* data = [string dataUsingEncoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmAES128,
kCCOptionPKCS7Padding|kCCOptionECBMode,
keyPtr,
kCCBlockSizeAES128,
NULL,
[data bytes],
dataLength,
buffer,
bufferSize, &numBytesEncrypted);
if (cryptStatus == kCCSuccess) {
NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
NSString *stringBase64 = [resultData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
// base64格式的字符串
return stringBase64;
}
free(buffer);
return nil;
}
解密：
+ (NSString *)decryptAES128With:(NSString *)string key:(NSString *)key
{
char keyPtr[kCCKeySizeAES128 + 1];
memset(keyPtr, 0, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSData *data = [[NSData alloc] initWithBase64EncodedString:string options:NSDataBase64DecodingIgnoreUnknownCharacters];//base64解码
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128; void *buffer = malloc(bufferSize);
size_t numBytesCrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
kCCAlgorithmAES128,
kCCOptionPKCS7Padding|kCCOptionECBMode,
keyPtr,
kCCBlockSizeAES128,
NULL,
[data bytes],
dataLength,
buffer,
bufferSize, &numBytesCrypted);
if (cryptStatus == kCCSuccess) {
NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
return [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];
}
free(buffer);
return nil;
}
AES256
加密：
+ (NSString *)encryptAES256With:(NSString *)string key:(NSString *)key
{
char keyPtr[kCCKeySizeAES256+1];
memset(keyPtr, 0, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSData* data = [string dataUsingEncoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
kCCAlgorithmAES128,
kCCOptionPKCS7Padding|kCCOptionECBMode,
keyPtr,
kCCBlockSizeAES128,
NULL,
[data bytes],
dataLength,
buffer,
bufferSize, &numBytesEncrypted);
if (cryptStatus == kCCSuccess) {
NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
NSString *stringBase64 = [resultData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
// base64格式的字符串
return stringBase64;
}
free(buffer);
return nil;
}
解密：
+ (NSString *)decryptAES256With:(NSString *)string key:(NSString *)key
{
char keyPtr[kCCKeySizeAES256 + 1];
memset(keyPtr, 0, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSData *data = [[NSData alloc] initWithBase64EncodedString:string options:NSDataBase64DecodingIgnoreUnknownCharacters];//base64解码
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128; void *buffer = malloc(bufferSize);
size_t numBytesCrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
kCCAlgorithmAES128,
kCCOptionPKCS7Padding|kCCOptionECBMode,
keyPtr,
kCCBlockSizeAES128,
NULL,
[data bytes],
dataLength,
buffer,
bufferSize, &numBytesCrypted);
if (cryptStatus == kCCSuccess) {
NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
return [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];
}
free(buffer);
return nil;
}
