iOS NSString 加密
NSString+Hash.h #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 NSString+Hash.m #import "NSString+Hash.h" #import <CommonCrypto/CommonCrypto.h> @implementation NSString (Hash) #pragma mark - 散列函数 - (NSString *)md5String { const char *str = self.UTF8String; uint8_t buffer[CC_MD5_DIGEST_LENGTH]; CC_MD5(str, (CC_LONG)strlen(str), buffer); return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH]; } - (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
