ios md加密

#import<CommonCrypto/CommonDigest.h>

-(NSString *) md5:(NSString *)str

{

const char *cStr = [str UTF8String];

unsigned char digest[CC_MD5_DIGEST_LENGTH];

CC_MD5( cStr, (unsigned int)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]];

//    16位需要这样截取

//    output = (NSMutableString*)[output substringFromIndex:8];

//    output = (NSMutableString*)[output substringToIndex:16];

return output;

}

-(NSString*) sha1:(NSString *)str

{

const char *cstr = [str cStringUsingEncoding:NSUTF8StringEncoding];

NSData *data = [NSData dataWithBytes:cstr length:str.length];

uint8_t digest[CC_SHA1_DIGEST_LENGTH];

CC_SHA1(data.bytes, (unsigned int)data.length, digest);

NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];

for(int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++)

[output appendFormat:@"%02x", digest[i]];

return output;

}