BASE64 encoding-MD5 Encryption-URL encoding

#pragma mark--------Code--------------

+ (NSString *) EncodeBase64: (NSString *) text

{

NSData * data = [text datausingencoding:nsutf8stringencoding allowlossyconversion:yes];

Convert to Base64

data = [GTMBase64 encodedata:data];

NSString * base64string = [[[NSString Alloc] initwithdata:data encoding:nsutf8stringencoding] autorelease];

return base64string;

}

+ (NSString *) DecodeBase64: (NSString *) text

{

NSData * data = [text datausingencoding:nsutf8stringencoding allowlossyconversion:yes];

Convert to Normal

data = [GTMBase64 decodedata:data];

NSString * string = [[NSString alloc] initwithdata:data encoding:nsutf8stringencoding] autorelease];

return string;

}

URL encoding

+ (NSString *) encodetopercentescapestring: (NSString *) input

{

NSString *outputstr = (NSString *)

Cfurlcreatestringbyaddingpercentescapes (Kcfallocatordefault,

(cfstringref) input,

Null

(cfstringref) @ "!*" ();: @&=+$,/?%#[] ",

KCFSTRINGENCODINGUTF8);

if (!outputstr | | (NSNull *) Outputstr = = [NSNull Null] | | OUTPUTSTR.LENGTH<1)

{

return @ "";

}

return outputstr;

}

MD5 encryption

+ (NSString *) md5string: (NSString *) str

{

const char *ORIGINAL_STR = [Str utf8string];

unsigned char result[cc_md5_digest_length];

CC_MD5 (ORIGINAL_STR, (int) strlen (ORIGINAL_STR), result);

nsmutablestring *hash = [nsmutablestring string];

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

[Hash appendformat:@ "%02x", Result[i]];

return [hash lowercasestring];

}

Static inline char Hexchar (unsigned char c) {

Return C < 10? ' 0 ' + C: ' a ' + c-10;

}

static inline void hexstring (unsigned char *from, char *to, Nsuinteger length) {

for (Nsuinteger i = 0; i < length; ++i) {

unsigned char c = from[i];

unsigned char Chigh = c >> 4;

unsigned char Clow = c & 0xf;

To[2 * I] = Hexchar (Chigh);

to[2 * i + 1] = Hexchar (Clow);

}

to[2 * Length] = ' + ';

}

NSString * SHA1 (const char *string)

{

if (!string)

{

return nil;

}

static const Nsuinteger LENGTH = 20;

unsigned char result[length];

CC_SHA1 (String, (Cc_long) strlen (string), result);

Char hexresult[2 * LENGTH + 1];

HexString (result, Hexresult, LENGTH);

return [NSString Stringwithutf8string:hexresult];

}

BASE64 encoding-MD5 Encryption-URL encoding