43 lines
1.2 KiB
Matlab
43 lines
1.2 KiB
Matlab
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//
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// SHA256Digest.m
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// Cog
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//
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// Created by Christopher Snowhill on 2/22/22.
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//
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#import "SHA256Digest.h"
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#import <CommonCrypto/CommonDigest.h>
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@implementation SHA256Digest
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+ (NSData *)digestBytes:(const void *)bytes length:(size_t)length {
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uint8_t result[CC_SHA256_DIGEST_LENGTH];
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CC_SHA256_CTX ctx;
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CC_SHA256_Init(&ctx);
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CC_SHA256_Update(&ctx, bytes, (CC_LONG)length);
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CC_SHA256_Final(&result[0], &ctx);
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return [NSData dataWithBytes:&result[0] length:sizeof(result)];
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}
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+ (NSData *)digestData:(const NSData *)data {
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return [SHA256Digest digestBytes:[data bytes] length:[data length]];
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}
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+ (NSString *)digestBytesAsString:(const void *)bytes length:(size_t)length {
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NSData *hashData = [SHA256Digest digestBytes:bytes length:length];
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length = [hashData length];
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NSMutableString *result = [NSMutableString stringWithCapacity:length * 2];
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const uint8_t *values = (const uint8_t *)[hashData bytes];
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for(size_t i = 0; i < length; ++i) {
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[result appendFormat:@"%02x", values[i]];
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}
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return [NSString stringWithString:result];
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}
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+ (NSString *)digestDataAsString:(const NSData *)data {
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return [SHA256Digest digestBytesAsString:[data bytes] length:[data length]];
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}
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@end
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