iOS - 常用的加密方法

加密函数

注意要包含

#import <CommonCrypto/CommonDigest.h>

//哈希加密
+ (NSString *)Base_HmacSha1:(NSString *)key data:(NSString *)data;
+ (NSString *)sha1:(NSString *)inputString;

//md5加密方法
+ (NSString *)md5:(NSString *)input;

具体代码

1.哈希加密

//hmac加密
+ (NSString *)Base_HmacSha1:(NSString *)key data:(NSString *)data{
    const char *cKey  = [key cStringUsingEncoding:NSASCIIStringEncoding];
    const char *cData = [data 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)];
    
    //将加密结果进行一次BASE64编码。
    NSString *hash = [HMAC base64EncodedStringWithOptions:0];
    return hash;
}

//哈希
+ (NSString *)sha1:(NSString *)inputString{
    NSData *data = [inputString dataUsingEncoding:NSUTF8StringEncoding];
    uint8_t digest[CC_SHA1_DIGEST_LENGTH];
    CC_SHA1(data.bytes,(unsigned int)data.length,digest);
    NSMutableString *outputString = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH];
    
    for (int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++) {
        [outputString appendFormat:@"%02x",digest[i]];
    }
    return [outputString lowercaseString];
}

2.md5

+ (NSString *)md5:(NSString *)input{
    const char *cStr = [input UTF8String];
    unsigned char digest[CC_MD5_DIGEST_LENGTH];
    CC_MD5(cStr,(CC_LONG)strlen(cStr),digest); 
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
    for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
        [output appendFormat:@"%02x", digest[i]];//注意这里的x绝对不能大写成X。。。
    return  output;
}