检测密码健壮性

来源：互联网发布：福州地铁软件编辑：程序博客网时间：2024/05/01 15:57

typedefNS_ENUM(NSInteger, PasswordStrengthLevel)

{

PasswordStrengthLevelVeryWeak =0,

PasswordStrengthLevelWeak,

PasswordStrengthLevelAverage,

PasswordStrengthLevelStrong,

PasswordStrengthLevelVeryStrong,

PasswordStrengthLevelSecure,

PasswordStrengthLevelVerySecure

};

+ (PasswordStrengthLevel)checkPasswordStrength:(NSString *)password

{

NSInteger length = [password length];

int lowercase = [selfcountLowercaseLetters:password];

int uppercase = [selfcountUppercaseLetters:password];

int numbers = [selfcountNumbers:password];

int symbols = [selfcountSymbols:password];

int score = 0;

if(length < 5)

score +=5;

else

if(length > 4 && length <8)

score +=10;

else

if(length > 7)

score +=20;

if(numbers == 1)

score +=10;

else

if(numbers == 2)

score +=15;

else

if(numbers > 2)

score +=20;

if(symbols == 1)

score +=10;

else

if(symbols == 2)

score +=15;

else

if(symbols > 2)

score +=20;

if(lowercase == 1)

score +=10;

else

if(lowercase == 2)

score +=15;

else

if(lowercase > 2)

score +=20;

if(uppercase == 1)

score +=10;

else

if(uppercase == 2)

score +=15;

else

if(uppercase > 2)

score +=20;

if(score == 100)

returnPasswordStrengthLevelVerySecure;

else

if (score >= 90)

returnPasswordStrengthLevelSecure;

else

if (score >= 80)

returnPasswordStrengthLevelVeryStrong;

else

if (score >= 70)

returnPasswordStrengthLevelStrong;

else

if (score >= 60)

returnPasswordStrengthLevelAverage;

else

if (score >= 50)

return PasswordStrengthLevelWeak;

else

return PasswordStrengthLevelVeryWeak;

}

+ (int)countLowercaseLetters:(NSString *)password

{

int count = 0;

for (int i =0; i < [password length]; i++)

{

BOOL isLowercase = [[NSCharacterSetlowercaseLetterCharacterSet] characterIsMember:[passwordcharacterAtIndex:i]];

if(isLowercase == YES)

count++;

}

return count;

}

+ (int)countUppercaseLetters:(NSString *)password

{

int count = 0;

for (int i =0; i < [password length]; i++)

{

BOOL isUppercase = [[NSCharacterSetuppercaseLetterCharacterSet] characterIsMember:[passwordcharacterAtIndex:i]];

if(isUppercase == YES)

count++;

}

return count;

}

+ (int)countNumbers:(NSString *)password

{

int count = 0;

for (int i =0; i < [password length]; i++)

{

BOOL isNumber = [[NSCharacterSetcharacterSetWithCharactersInString:@"0123456789"]characterIsMember:[password characterAtIndex:i]];

if(isNumber == YES)

count++;

}

return count;

}

+ (int)countSymbols:(NSString *)password

{

int count = 0;

for (int i =0; i < [password length]; i++)

{

BOOL isSymbol = [[NSCharacterSetcharacterSetWithCharactersInString:@"`~!?@#$€£¥§%^&*()_+-={}[]:\";<>'•\\|/"]characterIsMember:[password characterAtIndex:i]];

if(isSymbol == YES)

count++;

}

return count;

}

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