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关于HMAC签名相关

 3 years ago
source link: https://xnxy.github.io/xnxy.github.io/2020/11/04/%E5%85%B3%E4%BA%8EHMAC%E7%AD%BE%E5%90%8D%E7%9B%B8%E5%85%B3/
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关于HMAC签名相关

2020-11-04

|

2020-11-04

| 整理

Overview

节后有个项目使用到腾讯云的活体检测，其实功能也不是很复杂，但在对接腾讯云的时候被他的签名方式恶心了一下，但所在它的文档写的和详细，仔细地阅读了官方文档，最后也在很快的时间内对接成功。

这里主要记录HMAC-SHA1在iOS中的代码，便于后期查阅。

引入头文件

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#include <CommonCrypto/CommonDigest.h>
#include <CommonCrypto/CommonHMAC.h>

HMAC-SHA1算法签名,Base64进行编码

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- (NSString *)hmacsha1:(NSString *)obj key:(NSString *)key {
    const char *cKey  = [key cStringUsingEncoding:NSASCIIStringEncoding];
    const char *cData = [obj cStringUsingEncoding:NSASCIIStringEncoding];
    unsigned char cHMAC[CC_SHA1_DIGEST_LENGTH];

CCHmac(kCCHmacAlgSHA1, cKey, strlen(cKey), cData, strlen(cData), cHMAC);
    NSData *HMAC = [[NSData alloc] initWithBytes:cHMAC
                                          length:sizeof(cHMAC)];

NSString *hash = [HMAC base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

return hash;
}

report

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