45   var a =  1732584193;
46   var b = -271733879;
47   var c = -1732584194;
48   var d =  271733878;
51     var olda = a;
52     var oldb = b;
53     var oldc = c;
54     var oldd = d;
56     a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
57     d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
58     c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
59     b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
60     a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
61     d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
62     c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
63     b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
64     a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
65     d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
66     c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
67     b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
68     a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
69     d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
70     c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
71     b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);
73     a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
74     d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
75     c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
76     b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
77     a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
78     d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
79     c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
80     b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
81     a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
82     d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
83     c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
84     b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
85     a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
86     d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
87     c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
88     b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
90     a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
91     d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
92     c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
93     b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
94     a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
95     d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
96     c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
97     b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
98     a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
99     d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
100     c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
101     b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
102     a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
103     d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
104     c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
105     b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
107     a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
108     d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
109     c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
110     b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
111     a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
112     d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
113     c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
114     b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
115     a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
116     d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
117     c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
118     b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
119     a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
120     d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
121     c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
122     b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
124     a = safe_add(a, olda);
125     b = safe_add(b, oldb);
126     c = safe_add(c, oldc);
127     d = safe_add(d, oldd);
129   return Array(a, b, c, d);
132 function md5_cmn(q, a, b, x, s, t) {  argument
133   return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
136 function md5_ff(a, b, c, d, x, s, t) {  argument
137   return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
140 function md5_gg(a, b, c, d, x, s, t) {  argument
141   return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
144 function md5_hh(a, b, c, d, x, s, t) {  argument
145   return md5_cmn(b ^ c ^ d, a, b, x, s, t);
148 function md5_ii(a, b, c, d, x, s, t) {  argument
149   return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);