42 lines
994 B
Mathematica
42 lines
994 B
Mathematica
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// NSData+OSS.m
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// AliyunOSSSDK
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//
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// Created by ws on 2023/12/28.
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// Copyright © 2023 aliyun. All rights reserved.
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//
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#import "NSData+OSS.h"
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#import <CommonCrypto/CommonDigest.h>
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@implementation NSData (OSS)
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- (NSString *)hexString {
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NSMutableString *hexString = [NSMutableString string];
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Byte *byte = (Byte *)[self bytes];
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for (int i = 0; i<[self length]; i++) {
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[hexString appendFormat:@"%x", (*(byte + i) >> 4) & 0xf];
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[hexString appendFormat:@"%x", *(byte + i) & 0xf];
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}
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return hexString;
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}
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- (NSData *)calculateSha256 {
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unsigned char *digest = NULL;
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digest = malloc(CC_SHA256_DIGEST_LENGTH * sizeof(unsigned char));
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memset(digest, 0x0, CC_SHA256_DIGEST_LENGTH);
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CC_SHA256(self.bytes, (CC_LONG)self.length, digest);
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if (digest) {
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NSData *data = [NSData dataWithBytes:digest length:CC_SHA256_DIGEST_LENGTH];
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free(digest);
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return data;
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}
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free(digest);
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return nil;
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}
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@end
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