散列函数工具类

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头文件

////  NSString+Hash.h//////  Created by liyanjun on 15/11/12.//  Copyright (c) 2015年 liyanjun. All rights reserved.//#import <Foundation/Foundation.h>@interface NSString (Hash)#pragma mark - 散列函数/** *  计算MD5散列结果 * *  终端测试命令： *  @code *  md5 -s "string" *  @endcode * *  <p>提示：随着 MD5 碰撞生成器的出现，MD5 算法不应被用于任何软件完整性检查或代码签名的用途。<p> * *  @return 32个字符的MD5散列字符串 */- (NSString *)md5String;/** *  计算SHA1散列结果 * *  终端测试命令： *  @code *  echo -n "string" | openssl sha -sha1 *  @endcode * *  @return 40个字符的SHA1散列字符串 */- (NSString *)sha1String;/** *  计算SHA256散列结果 * *  终端测试命令： *  @code *  echo -n "string" | openssl sha -sha256 *  @endcode * *  @return 64个字符的SHA256散列字符串 */- (NSString *)sha256String;/** *  计算SHA 512散列结果 * *  终端测试命令： *  @code *  echo -n "string" | openssl sha -sha512 *  @endcode * *  @return 128个字符的SHA 512散列字符串 */- (NSString *)sha512String;#pragma mark - HMAC 散列函数/** *  计算HMAC MD5散列结果 * *  终端测试命令： *  @code *  echo -n "string" | openssl dgst -md5 -hmac "key" *  @endcode * *  @return 32个字符的HMAC MD5散列字符串 */- (NSString *)hmacMD5StringWithKey:(NSString *)key;/** *  计算HMAC SHA1散列结果 * *  终端测试命令： *  @code *  echo -n "string" | openssl sha -sha1 -hmac "key" *  @endcode * *  @return 40个字符的HMAC SHA1散列字符串 */- (NSString *)hmacSHA1StringWithKey:(NSString *)key;/** *  计算HMAC SHA256散列结果 * *  终端测试命令： *  @code *  echo -n "string" | openssl sha -sha256 -hmac "key" *  @endcode * *  @return 64个字符的HMAC SHA256散列字符串 */- (NSString *)hmacSHA256StringWithKey:(NSString *)key;/** *  计算HMAC SHA512散列结果 * *  终端测试命令： *  @code *  echo -n "string" | openssl sha -sha512 -hmac "key" *  @endcode * *  @return 128个字符的HMAC SHA512散列字符串 */- (NSString *)hmacSHA512StringWithKey:(NSString *)key;#pragma mark - 文件散列函数/** *  计算文件的MD5散列结果 * *  终端测试命令： *  @code *  md5 file.dat *  @endcode * *  @return 32个字符的MD5散列字符串 */- (NSString *)fileMD5Hash;/** *  计算文件的SHA1散列结果 * *  终端测试命令： *  @code *  openssl sha -sha1 file.dat *  @endcode * *  @return 40个字符的SHA1散列字符串 */- (NSString *)fileSHA1Hash;/** *  计算文件的SHA256散列结果 * *  终端测试命令： *  @code *  openssl sha -sha256 file.dat *  @endcode * *  @return 64个字符的SHA256散列字符串 */- (NSString *)fileSHA256Hash;/** *  计算文件的SHA512散列结果 * *  终端测试命令： *  @code *  openssl sha -sha512 file.dat *  @endcode * *  @return 128个字符的SHA512散列字符串 */- (NSString *)fileSHA512Hash;@end

体文件

////  NSString+Hash.m////  Created by liyanjun on 15/11/12.//  Copyright (c) 2015年 liyanjun. All rights reserved.//#import "NSString+Hash.h"#import <CommonCrypto/CommonCrypto.h>//导入框架@implementation NSString (Hash)#pragma mark - 散列函数- (NSString *)md5String {    const char *str = self.UTF8String;//把当前的字符串 转成C语言字符串    uint8_t buffer[CC_MD5_DIGEST_LENGTH];//开辟一个长度CC_MD5_DIGEST_LENGTH的空间    CC_MD5(str, (CC_LONG)strlen(str), buffer);//核心计算 str：对谁 第二参数是长度 形成的结果放到buffer中    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];//将buffer转成Nsstring}- (NSString *)sha1String {    const char *str = self.UTF8String;    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];    CC_SHA1(str, (CC_LONG)strlen(str), buffer);    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];}- (NSString *)sha256String {    const char *str = self.UTF8String;    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];    CC_SHA256(str, (CC_LONG)strlen(str), buffer);    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];}- (NSString *)sha512String {    const char *str = self.UTF8String;    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];    CC_SHA512(str, (CC_LONG)strlen(str), buffer);    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];}#pragma mark - HMAC 散列函数- (NSString *)hmacMD5StringWithKey:(NSString *)key {    const char *keyData = key.UTF8String;    const char *strData = self.UTF8String;    uint8_t buffer[CC_MD5_DIGEST_LENGTH];    CCHmac(kCCHmacAlgMD5, keyData, strlen(keyData), strData, strlen(strData), buffer);    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];}- (NSString *)hmacSHA1StringWithKey:(NSString *)key {    const char *keyData = key.UTF8String;    const char *strData = self.UTF8String;    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];    CCHmac(kCCHmacAlgSHA1, keyData, strlen(keyData), strData, strlen(strData), buffer);    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];}- (NSString *)hmacSHA256StringWithKey:(NSString *)key {    const char *keyData = key.UTF8String;    const char *strData = self.UTF8String;    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];    CCHmac(kCCHmacAlgSHA256, keyData, strlen(keyData), strData, strlen(strData), buffer);    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];}- (NSString *)hmacSHA512StringWithKey:(NSString *)key {    const char *keyData = key.UTF8String;    const char *strData = self.UTF8String;    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];    CCHmac(kCCHmacAlgSHA512, keyData, strlen(keyData), strData, strlen(strData), buffer);    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];}#pragma mark - 文件散列函数#define FileHashDefaultChunkSizeForReadingData 4096- (NSString *)fileMD5Hash {    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];    if (fp == nil) {        return nil;    }    CC_MD5_CTX hashCtx;    CC_MD5_Init(&hashCtx);    while (YES) {        @autoreleasepool {            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];            CC_MD5_Update(&hashCtx, data.bytes, (CC_LONG)data.length);            if (data.length == 0) {                break;            }        }    }    [fp closeFile];    uint8_t buffer[CC_MD5_DIGEST_LENGTH];    CC_MD5_Final(buffer, &hashCtx);    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];}- (NSString *)fileSHA1Hash {    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];    if (fp == nil) {        return nil;    }    CC_SHA1_CTX hashCtx;    CC_SHA1_Init(&hashCtx);    while (YES) {        @autoreleasepool {            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];            CC_SHA1_Update(&hashCtx, data.bytes, (CC_LONG)data.length);            if (data.length == 0) {                break;            }        }    }    [fp closeFile];    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];    CC_SHA1_Final(buffer, &hashCtx);    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];}- (NSString *)fileSHA256Hash {    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];    if (fp == nil) {        return nil;    }    CC_SHA256_CTX hashCtx;    CC_SHA256_Init(&hashCtx);    while (YES) {        @autoreleasepool {            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];            CC_SHA256_Update(&hashCtx, data.bytes, (CC_LONG)data.length);            if (data.length == 0) {                break;            }        }    }    [fp closeFile];    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];    CC_SHA256_Final(buffer, &hashCtx);    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];}- (NSString *)fileSHA512Hash {    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];    if (fp == nil) {        return nil;    }    CC_SHA512_CTX hashCtx;    CC_SHA512_Init(&hashCtx);    while (YES) {        @autoreleasepool {            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];            CC_SHA512_Update(&hashCtx, data.bytes, (CC_LONG)data.length);            if (data.length == 0) {                break;            }        }    }    [fp closeFile];    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];    CC_SHA512_Final(buffer, &hashCtx);    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];}#pragma mark - 助手方法/** *  返回二进制 Bytes 流的字符串表示形式 * *  @param bytes  二进制 Bytes 数组 *  @param length 数组长度 * *  @return 字符串表示形式 */- (NSString *)stringFromBytes:(uint8_t *)bytes length:(int)length {    NSMutableString *strM = [NSMutableString string];    for (int i = 0; i < length; i++) {        [strM appendFormat:@"%02x", bytes[i]];    }    return [strM copy];}@end

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