MD5加密 32位

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/**

*  MD5 32位加密

*

*  @param string 原始字符串

*

*  @return 加密字符串

*/

+ (NSString *)getMd5_32Bit:(NSString *)string{

const char *cStr = [string UTF8String];

unsigned char digest[CC_MD5_DIGEST_LENGTH];

CC_MD5( cStr,(uint32_t)strlen(cStr), digest );

NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];

for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)

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

return result;

}

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