Iam在iPhone Applecation中实现SHA1和HMAC方法有趣。我需要访问一个web服务(我不控制它),他们需要SHA1和HMAC加密。SHA1在base64和HMAC在HEX输出问题Iam iphone
对于我在base64中的SHA1,我使用以下方法。
-(NSString*)sha1ith64Base:(NSString *)stringtoencode
{
unsigned char result[CC_SHA1_DIGEST_LENGTH];
const char *cStr = [stringtoencode UTF8String];
CC_SHA1(cStr, strlen(cStr), result);
NSData *pwHashData = [[NSData alloc] initWithBytes:result length: sizeof result];
NSString *base64 = [Base64 encode:pwHashData];
NSLog(@"SHA1 in base64 %@",base64);
return base64;
}
对于我HMAC我使用以下方法:
- (NSString *) encodeWithHmacsha1:(NSString *)k0:(NSString*)m0
{
const char *cKey = [k0 cStringUsingEncoding:NSASCIIStringEncoding];
const char *cData = [m0 cStringUsingEncoding:NSASCIIStringEncoding];
unsigned char cHMAC[CC_SHA1_DIGEST_LENGTH];
CCHmac(kCCHmacAlgSHA1, cKey, strlen(cKey), cData, strlen(cData), cHMAC);
NSString *s = [NSString stringWithFormat:
@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
cHMAC[0], cHMAC[1], cHMAC[2], cHMAC[3], cHMAC[4],
cHMAC[5], cHMAC[6], cHMAC[7],
cHMAC[8], cHMAC[9], cHMAC[10], cHMAC[11], cHMAC[12],
cHMAC[13], cHMAC[14], cHMAC[15],
cHMAC[16], cHMAC[17], cHMAC[18], cHMAC[19]
];
NSLog(@"HMAC in hex %@",s);
return s;
}
但我的实际问题是,有没有什么办法可以在本地,而不是向上抵挡得住的Web服务测试这些方法 - 这样我就可以排除来自wbservice的错误。
问候
解决: 测试我实现我用下面的方法 - 希望这可以帮助别人,有一天。
-(void)testEncryptions
{
NSString *key = @"Jefe";
NSString *data = @"what do ya want for nothing?";
NSString *digestAnswerHMAC [email protected]"effcdf6ae5eb2fa2d27416d5f184df9c259a7c79";
NSString *digestAnswerSHA1HEX [email protected]"cb5551f403fac5fd3d6d1b6329993c3848c468ce";
NSString *[email protected]"SmVmZQ==";
NSData *stringBytes = [key dataUsingEncoding: NSUTF8StringEncoding];
NSString *hash = [Base64 encode:stringBytes];
//////
NSLog(@"testing encryptions");
NSLog(@"testing HMAC encryptions is :%@ should be :%@",[self encodeWithHmacsha1:key :data],digestAnswerHMAC);
NSLog(@"testing SHA1 in HEX encryption is :%@ should be :%@",[self sha1:key],digestAnswerSHA1HEX);
NSLog(@"testing base64 is :%@ should be :%@",hash,disgest64base);
NSLog(@"testing sha1 in 64 1234 is %@ and should be cRDtpNCeBiql5KOQsKVyrA0sAiA=",[self sha1ith64Base:@"1234"]);
}
非常感谢你我用已知的输入/出和测试我的实现和他们的工作为目的。所以如果有人需要SHA1和HMAC--随时可以使用它:)另一次我会花时间阅读你的博客:) – Bjarke