SHA1 加密源码
SHA1加密（Java版）public class SHA1 { private static final boolean hexcase = false; private static final int chrsz = 8; // 得到字符串SHA-1值的方法 public static String hex_sha1(String s) { s = (s == null) ? "" : s; return binb2hex(core_sha1(str2binb(s), s.length() * chrsz)); } private static String binb2hex(int[] binarray) { String hex_tab = hexcase ? "0123456789abcdef" : "0123456789abcdef"; String str = ""; for (int i = 0; i < binarray.length * 4; i++) { char a = (char) hex_tab.charAt((binarray >> ((3 - i % 4) * 8 + 4)) & 0xf); char b = (char) hex_tab.charAt((binarray >> ((3 - i % 4) * 8)) & 0xf); str += (new Character(a).toString() + new Character(b).toString()); } return str; } private static String binb2str(int[] bin) { String str = ""; int mask = (1 << chrsz) - 1; for (int i = 0; i < bin.length * 32; i += chrsz) { str += (char) ((bin >>> (24 - i % 32)) & mask); } return str; } private static int[] core_sha1(int[] x, int len) { int size = (len >> 5); x = strechbinarray(x, size); x |= 0x80 << (24 - len % 32); size = ((len + 64 >> 9) << 4) + 15; x = strechbinarray(x, size); x[((len + 64 >> 9) << 4) + 15] = len; int[] w = new int; int a = 1732584193; int b = -271733879; int c = -1732584194; int d = 271733878; int e = -1009589776; for (int i = 0; i < x.length; i += 16) { int olda = a; int oldb = b; int oldc = c; int oldd = d; int olde = e; for (int j = 0; j < 80; j++) { if (j < 16) { w = x; } else { w = rol(w ^ w ^ w ^ w, 1); } int t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w), sha1_kt(j))); e = d; d = c; c = rol(b, 30); b = a; a = t; } a = safe_add(a, olda); b = safe_add(b, oldb); c = safe_add(c, oldc); d = safe_add(d, oldd); e = safe_add(e, olde); } int[] retval = new int; retval = a; retval = b; retval = c; retval = d; retval = e; return retval; } private static int rol(int num, int cnt) { return (num << cnt) | (num >>> (32 - cnt)); } private static int safe_add(int x, int y) { int lsw = (int) (x & 0xffff) + (int) (y & 0xffff); int msw = (x >> 16) + (y >> 16) + (lsw >> 16); return (msw << 16) | (lsw & 0xffff); } private static int sha1_ft(int t, int b, int c, int d) { if (t < 20) return (b & c) | ((~b) & d); if (t < 40) return b ^ c ^ d; if (t < 60) return (b & c) | (b & d) | (c & d); return b ^ c ^ d; } private static int sha1_kt(int t) { return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 : (t < 60) ? -1894007588 : -899497514; } public static String str_sha1(String s) { s = (s == null) ? "" : s; return binb2str(core_sha1(str2binb(s), s.length() * chrsz)); } private static int[] str2binb(String str) { str = (str == null) ? "" : str; int[] tmp = new int; int mask = (1 << chrsz) - 1; for (int i = 0; i < str.length() * chrsz; i += chrsz) { tmp |= ((int) (str.charAt(i / chrsz)) & mask) << (24 - i % 32); } int len = 0; for (int i = 0; i < tmp.length && tmp != 0; i++, len++) ; int[] bin = new int; for (int i = 0; i < len; i++) { bin = tmp; } return bin; } private static int[] strechbinarray(int[] oldbin, int size) { int currlen = oldbin.length; if (currlen >= size + 1) { return oldbin; } int[] newbin = new int; for (int i = 0; i < size; newbin = 0, i++) ; for (int i = 0; i < currlen; i++) { newbin = oldbin; } return newbin; }}
测试类：
public static void main(String args[]) { System.out.println(SHA1.hex_sha1("123456"));}
SHA1加密（Flex版）
package{import flash.utils.ByteArray;import mx.utils.Base64Encoder;/** *US Secure Hash Algorithm 1 (SHA1) */public class SHA1{private static var hexChars:String = "0123456789abcdef";public static var digest:ByteArray;/** *Performs the SHA1 hash algorithm on a string. * *@param sThe string to hash *@returnA string containing the hash value of s *@langversionActionScript 3.0 *@playerversion9.0 *@tiptext */public static function hash( s:String ):String{var blocks:Array = createBlocksFromString( s );var byteArray:ByteArray = hashBlocks( blocks );return toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true );}public static function hashBytes( data:ByteArray ):String{var blocks:Array = SHA1.createBlocksFromByteArray( data );var byteArray:ByteArray = hashBlocks(blocks);return toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true )+ toHex( byteArray.readInt(), true );}public static function hashToBase64( s:String ):String{var blocks:Array = SHA1.createBlocksFromString( s );var byteArray:ByteArray = hashBlocks(blocks);var charsInByteArray:String = "";byteArray.position = 0;for (var j:int = 0; j < byteArray.length; j++){var byte:uint = byteArray.readUnsignedByte();charsInByteArray += String.fromCharCode(byte);}var encoder:Base64Encoder = new Base64Encoder();encoder.encode(charsInByteArray);return encoder.flush();}private static function rol ( x:int, n:int ):int {return ( x << n ) | ( x >>> ( 32 - n ) );}private static function ror ( x:int, n:int ):uint {var nn:int = 32 - n;return ( x << nn ) | ( x >>> ( 32 - nn ) );}private static function toHex( n:int, bigEndian:Boolean = false ):String {var s:String = "";if ( bigEndian ) {for ( var i:int = 0; i < 4; i++ ) {s += hexChars.charAt( ( n >> ( ( 3 - i ) * 8 + 4 ) ) & 0xF ) + hexChars.charAt( ( n >> ( ( 3 - i ) * 8 ) ) & 0xF );}} else {for ( var x:int = 0; x < 4; x++ ) {s += hexChars.charAt( ( n >> ( x * 8 + 4 ) ) & 0xF )+ hexChars.charAt( ( n >> ( x * 8 ) ) & 0xF );}}return s;}private static function hashBlocks( blocks:Array ):ByteArray{var h0:int = 0x67452301;var h1:int = 0xefcdab89;var h2:int = 0x98badcfe;var h3:int = 0x10325476;var h4:int = 0xc3d2e1f0;var len:int = blocks.length;var w:Array = new Array( 80 );for ( var i:int = 0; i < len; i += 16 ) {var a:int = h0;var b:int = h1;var c:int = h2;var d:int = h3;var e:int = h4;for ( var t:int = 0; t < 80; t++ ) {if ( t < 16 ) {// 6.1.aw[ t ] = blocks[ i + t ];} else {// 6.1.bw[ t ] = rol( w[ t - 3 ] ^ w[ t - 8 ] ^ w[ t - 14 ] ^ w[ t - 16 ], 1 );}// 6.1.dvar temp:int = rol( a, 5 ) + f( t, b, c, d ) + e + int( w[ t ] ) + k( t );e = d;d = c;c = rol( b, 30 );b = a;a = temp;}// 6.1.eh0 += a;h1 += b;h2 += c;h3 += d;h4 += e;}var byteArray:ByteArray = new ByteArray();byteArray.writeInt(h0);byteArray.writeInt(h1);byteArray.writeInt(h2);byteArray.writeInt(h3);byteArray.writeInt(h4);byteArray.position = 0;digest = new ByteArray();digest.writeBytes(byteArray);digest.position = 0;return byteArray;}private static function f( t:int, b:int, c:int, d:int ):int {if ( t < 20 ) {return ( b & c ) | ( ~b & d );} else if ( t < 40 ) {return b ^ c ^ d;} else if ( t < 60 ) {return ( b & c ) | ( b & d ) | ( c & d );}return b ^ c ^ d;}private static function k( t:int ):int {if ( t < 20 ) {return 0x5a827999;} else if ( t < 40 ) {return 0x6ed9eba1;} else if ( t < 60 ) {return 0x8f1bbcdc;}return 0xca62c1d6;}private static function createBlocksFromByteArray( data:ByteArray ):Array{var oldPosition:int = data.position;data.position = 0;var blocks:Array = new Array();var len:int = data.length * 8;var mask:int = 0xFF; // ignore hi byte of characters > 0xFFfor( var i:int = 0; i < len; i += 8 ){blocks[ i >> 5 ] |= ( data.readByte() & mask ) << ( 24 - i % 32 );}// append padding and lengthblocks[ len >> 5 ] |= 0x80 << ( 24 - len % 32 );blocks[ ( ( ( len + 64 ) >> 9 ) << 4 ) + 15 ] = len;data.position = oldPosition;return blocks;}private static function createBlocksFromString( s:String ):Array{var blocks:Array = new Array();var len:int = s.length * 8;var mask:int = 0xFF; // ignore hi byte of characters > 0xFFfor( var i:int = 0; i < len; i += 8 ) {blocks[ i >> 5 ] |= ( s.charCodeAt( i / 8 ) & mask ) << ( 24 - i % 32 );}// append padding and lengthblocks[ len >> 5 ] |= 0x80 << ( 24 - len % 32 );blocks[ ( ( ( len + 64 ) >> 9 ) << 4 ) + 15 ] = len;return blocks;}}}
测试类：
public function init():void{ Alert.show(SHA1.hash("123456"));}
Flex使用mx.utils.SHA256类来实现SHA256加密：
package{import flash.utils.ByteArray;import mx.utils.SHA256;public class SHA256_Test{public function SHA256_Test(){}public static function sha_256(source : String):String{var encryption : String;var ba : ByteArray = new ByteArray();ba.writeUTFBytes(source);encryption = mx.utils.SHA256.computeDigest(ba);return encryption;}}}
测试类：
public function init():void{ Alert.show(SHA256_Test.sha_256("123456"));}
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