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@ -10,43 +10,6 @@ CHAR_REDACTED = '\u2588' # Full block. |
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CHAR_CONFLICT = '\u2573' # Box drawings light diagonal cross. |
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CHAR_CONFLICT = '\u2573' # Box drawings light diagonal cross. |
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NTRUSTEES = 3 # for now(?) |
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NTRUSTEES = 3 # for now(?) |
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#------ begin prefab input |
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cipher1 = [ |
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['lgPNUJU8', 'qLvBBQ==', '5GfdMat4', 'z8hPe4BlxxdUMXzi4w==', '2IheMA==', |
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'uZyB', 'wVCtnQ==', 'VnU=', '/pTNipiB55M=', 'XcT1gQ==', 'gxU8', '9MYX', |
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'io0='], |
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['0fOyC2/y', 'bg8=', 'bu2T', 'rJH6dWUzpg==', 'B4BTkvtl', '+Ug=', '6wky', |
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'H78=', 'nx8=', 'TO3/fbE=', 'tqw=', 'S4k8', '+mXOsQ==', 'E3rblIM=', |
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'bIu6qbrh1g=='], |
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['sfjl', 'JBxnLbfe0k0n', 'BShgq+QrmdquMA==', 'VYD1hx8=', 'MLk=', 'ig==', |
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'oasqOoWF', 'Asw=', 'Rof1s/gpQQONcnk=', 'ZW3zOSnTvyg=', 'QlA=', |
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'6Q0qOw=='], |
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['9fPa', '2mFZdDltLL4=', '13vdBg==', '+eWH', 'koB24LLGnxs=', 'CedkJ3k=', |
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'b41+QUU=', 'fRkV', '4/Yc', 'anY6cA==', 'muk=', '9LrH', '5t1uXU0=', |
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'M1eqTaWs'], |
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['8Ah2Pq4=', 'ouQ=', 'miJQVgwle6yOcg==', 'PPc=', '6jes', 'kYsY2ynZdg==']] |
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pad1 = [ |
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['xWusIv5F', '29q4dg==', 'zAa7Rc4K', 'pqY7HvIXqHA1RRWMhA==', None, None, |
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'lSXD+g==', None, None, None, None, None, None], |
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['sJDRbhyB', None, None, None, None, 'uDs=', 'jWhA', None, '6Ho=', |
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'J4OQCp0=', '39g=', 'JuhF', 'kgS41A==', 'fR+t8fE=', None], |
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['5ZCA', None, None, None, 'Wco=', None, None, None, 'L+mR1ohML2foHA0=', |
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None, None, None], |
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['sbuL', 'qhM8EFAOWM0=', 'oxO8cg==', None, '/eYQidGv/nc=', 'epMLVQA=', |
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None, None, 'i5dv', 'Dh9fFA==', None, 'gNKi', 'lrEPMyg=', None], |
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[None, None, '+UoxOmBAFcvrFg==', 'Xo4=', None, '4f56t0C6WA==']] |
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pad2 = [ |
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[None, None, None, None, 'nvo/RQ==', '7ebk', None, 'Pxs=', |
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'jvG/+ffvzr8=', 'KayU9Q==', '8H1Z', 'nKdz', '5OI='], |
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[None, 'GmA=', 'GoX2', '/OSQHAtXxw==', 'd+Ej94lL', None, None, 'fsw=', |
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None, None, None, None, None, None, 'AO7bwt+F+A=='], |
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[None, 'YXBKZdaztixJ', 'YEYD2Z1b7bPBXg==', 'NvKU5HQ=', None, '6w==', |
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'085ZT+nx', 'bao=', None, 'FwiAXEih3EA=', 'ICk=', 'r1l+FQ=='], |
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[None, None, None, 'jY3i', None, None, 'R/kWIDE=', 'O01B', None, None, |
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'84c=', None, 'kq8PNCM=', 'UCXLPs2F'], |
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['h2cYGdo=', 'wIE=', None, None, 'nl/J', None]] |
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#------ end prefab input |
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## [['an', 'msg', 'is', 'a', 'list', 'of', 'lines,'], |
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## [['an', 'msg', 'is', 'a', 'list', 'of', 'lines,'], |
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## ['where', 'each', 'line', 'is', 'a', 'list', 'of', 'words.']] |
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## ['where', 'each', 'line', 'is', 'a', 'list', 'of', 'words.']] |
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def str2msg(s): |
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def str2msg(s): |
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@ -59,26 +22,26 @@ def msg2str(ws): |
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def mapmsgs(func, *msgs): |
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def mapmsgs(func, *msgs): |
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"""map func word-per-word on all corresponding words inside [a sequence of] msgs of the same structure. E.g. |
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"""map func word-per-word on all corresponding words inside [a sequence of] msgs of the same structure. E.g. |
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>>> mapmsgs(lambda word1,word2:'({}/{})'.format(word1,word2),str2msg("a b\nc d"),str2msg("x y\nz w")) |
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>>> mapmsgs(lambda word1, word2:'({}/{})'.format(word1, word2), str2msg("a b\nc d"), str2msg("x y\nz w")) |
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[['(a/x)', '(b/y)'], ['(c/z)', '(d/w)']]""" |
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[['(a/x)', '(b/y)'], ['(c/z)', '(d/w)']]""" |
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return list(map(lambda s:list(map(lambda v:func(*v), zip(*s))), zip(*msgs))) |
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return list(map(lambda s:list(map(lambda v:func(*v), zip(*s))), zip(*msgs))) |
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def msgget(msg,key,default=None): |
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def msgget(msg, key, default=None): |
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return mapmsgs(lambda d:d.get(key,default),msg) |
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return mapmsgs(lambda d:d.get(key, default), msg) |
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## conversion helpers |
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## conversion helpers |
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def str2bytes(s): |
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def str2bytes(s): |
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return bytes(s,'utf8') |
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return bytes(s, 'utf8') |
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def bytes2str(b): |
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def bytes2str(b): |
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return str(b,'utf8','replace') |
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return str(b, 'utf8', 'replace') |
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def bytes2base64(b): |
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def bytes2base64(b): |
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return str(codecs.encode(b,'base64').strip(),'ascii') |
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return str(codecs.encode(b, 'base64').strip(), 'ascii') |
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def base642bytes(b64): |
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def base642bytes(b64): |
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if b64 is None: return None # Might be missing |
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if b64 is None: return None # Might be missing |
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return codecs.decode(bytes(b64,'ascii'),'base64') |
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return codecs.decode(bytes(b64, 'ascii'), 'base64') |
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## "crypto" functions |
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## "crypto" functions |
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def makepad(b): |
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def makepad(b): |
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@ -87,14 +50,10 @@ encoded to base64. |
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You think this random function is weak? *Celebrate* that ;)""" |
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You think this random function is weak? *Celebrate* that ;)""" |
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return random._urandom(len(b)) |
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return random._urandom(len(b)) |
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def makeid(): |
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def xor2(c1, c2): |
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"Looks fancy enough and would probably never collide" |
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return 'DA{:.4f}'.format(time.time()).replace('.','') |
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def xor2(c1,c2): |
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return c1^c2 |
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return c1^c2 |
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def integrate2(a,b): |
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def integrate2(a, b): |
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if a is None or a==b: return b |
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if a is None or a==b: return b |
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if b is None: return a |
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if b is None: return a |
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return "" # Invoke a conflict [0 is always wrong length ;)] |
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return "" # Invoke a conflict [0 is always wrong length ;)] |
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@ -102,86 +61,162 @@ def integrate2(a,b): |
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def integrate(*args): |
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def integrate(*args): |
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if not args: return None |
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if not args: return None |
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if len(args)==1: return args[0] |
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if len(args)==1: return args[0] |
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return integrate2(args[0],integrate(*args[1:])) |
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return integrate2(args[0], integrate(*args[1:])) |
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def _redact(s): |
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def _redact(s): |
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plaintext = str2bytes(s) |
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plaintext = str2bytes(s) |
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pad = makepad(plaintext) |
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pad = makepad(plaintext) |
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return {"cipher":bytes2base64(bytes(map(xor2,plaintext,pad))), "pad":bytes2base64(pad)} |
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return {"cipher":bytes2base64(bytes(map(xor2, plaintext, pad))), "pad":bytes2base64(pad)} |
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def _unredact(cipher,pad): |
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def _unredact(cipher, pad): |
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if pad is None: # pad is missing |
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if pad is None: # pad is missing |
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return(CHAR_REDACTED*len(cipher)) |
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return(CHAR_REDACTED*len(cipher)) |
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if len(cipher)!=len(pad): # Failed the only integrity test ;) |
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if len(cipher)!=len(pad): # Failed the only integrity test ;) |
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return(CHAR_CONFLICT*len(cipher)) |
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return(CHAR_CONFLICT*len(cipher)) |
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return str(bytes(map(xor2,cipher,pad)),'utf8','replace') |
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return str(bytes(map(xor2, cipher, pad)), 'utf8', 'replace') |
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def _disintegrate(value,k=NTRUSTEES): |
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def _disintegrate(value, k=NTRUSTEES): |
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lucky = random.randint(0,k-1) |
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lucky = random.randint(0, k-1) |
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return [i==lucky and value or None for i in range(k)] |
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return [i==lucky and value or None for i in range(k)] |
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def disintegrate(msg,k=NTRUSTEES): |
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def disintegrate(msg, k=NTRUSTEES): |
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zipped = mapmsgs(lambda p:_disintegrate(p,k),msg) |
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zipped = mapmsgs(lambda p:_disintegrate(p, k), msg) |
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return [mapmsgs(lambda v:v[i],zipped) for i in range(k)] |
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return [mapmsgs(lambda v:v[i], zipped) for i in range(k)] |
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def redact(s,k=NTRUSTEES): |
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def redact(s, sender, recipients=[], subject="(untitled)", k=NTRUSTEES): |
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redaction = mapmsgs(_redact,str2msg(s)) |
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msgid = makeid() |
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return { |
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trustees = choosetrustees(k,exclude=[sender]+recipients) |
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'cipher': msgget(redaction,'cipher'), |
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header = { |
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'pads': disintegrate(msgget(redaction,'pad'),k)} |
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"msgid": msgid, "sender": sender, "recipients": recipients, |
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"subject": subject, "trustees": trustees} |
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def unredact(cipher64,*pads64): |
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redaction = mapmsgs(_redact, str2msg(s)) |
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pads = dict(zip(trustees,disintegrate(msgget(redaction, 'pad'), len(trustees)))) |
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result = {} |
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result['__public__'] = header.copy() |
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result['__public__']['cipher'] = msgget(redaction, 'cipher') |
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result['__to__'] = header.copy() |
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result['__to__']['pads'] = pads # the whole shebang |
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for t in trustees: |
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result[t] = header.copy() |
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result[t]['pads'] = {t: pads[t]} |
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return result; |
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def unredact(cipher, pads, trustees=[]): |
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cipher64 = cipher['cipher'] |
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pads64 = [pads['pads'][t] for t in pads['pads'] |
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if not trustees or t in trustees] |
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return msg2str(mapmsgs( |
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return msg2str(mapmsgs( |
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_unredact, |
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_unredact, |
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mapmsgs(base642bytes,cipher64), |
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mapmsgs(base642bytes, cipher64), |
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mapmsgs(base642bytes, |
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mapmsgs(base642bytes, |
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mapmsgs(integrate,*pads64)))) |
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mapmsgs(integrate, *pads64)))) |
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## Game functions |
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## Game functions |
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def makeid(): |
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"""msgid (e.g. can be used as hashtags in move twists). |
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Sorting by it is like sorting by time, |
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it looks fancy enough, and would probably never collide""" |
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return 'DA{:.4f}'.format(time.time()).replace('.', '') |
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def getplayers(): |
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def getplayers(): |
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"returns players.csv as a dict" |
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"returns players.csv as a dict" |
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c=csv.reader(open('players.csv')) |
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c=csv.reader(open('players.csv')) |
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names = next(c) |
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names = next(c) |
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d = {} |
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d = {} |
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for r in c: |
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for r in c: |
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p = dict(zip(names,r)) |
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p = dict(zip(names, r)) |
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d[p['player']] = p |
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d[p['player']] = p |
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return d |
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return d |
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def choosetrustees(n=NTRUSTEES, exclude=[], players=None): |
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def choosetrustees(k=NTRUSTEES, exclude=[], players=None): |
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if players is None: |
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if players is None: |
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players = getplayers() |
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players = getplayers() |
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candidates = list(set(players.keys())-set(exclude)) |
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candidates = list(set(players.keys())-set(exclude)) |
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return random.sample(candidates,n) |
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return random.sample(candidates, k) |
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#------ begin prefab redaction |
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prefab = { |
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"__public__": {"trustees": ["ted", "dan"], "sender": "alice", |
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"msgid": "DA14341968415407", "recipients": ["bob", "carol"], |
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"subject": "Hey, sport. YOU connect the dots.", "cipher": |
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[["lgPNUJU8", "qLvBBQ==", "5GfdMat4", "z8hPe4BlxxdUMXzi4w==", |
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"2IheMA==", "uZyB", "wVCtnQ==", "VnU=", "/pTNipiB55M=", "XcT1gQ==", |
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"gxU8", "9MYX", "io0="], ["0fOyC2/y", "bg8=", "bu2T", "rJH6dWUzpg==", |
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"B4BTkvtl", "+Ug=", "6wky", "H78=", "nx8=", "TO3/fbE=", "tqw=", |
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"S4k8", "+mXOsQ==", "E3rblIM=", "bIu6qbrh1g=="], ["sfjl", |
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"JBxnLbfe0k0n", "BShgq+QrmdquMA==", "VYD1hx8=", "MLk=", "ig==", |
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"oasqOoWF", "Asw=", "Rof1s/gpQQONcnk=", "ZW3zOSnTvyg=", "QlA=", |
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"6Q0qOw=="], ["9fPa", "2mFZdDltLL4=", "13vdBg==", "+eWH", |
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"koB24LLGnxs=", "CedkJ3k=", "b41+QUU=", "fRkV", "4/Yc", "anY6cA==", |
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"muk=", "9LrH", "5t1uXU0=", "M1eqTaWs"], ["8Ah2Pq4=", "ouQ=", |
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"miJQVgwle6yOcg==", "PPc=", "6jes", "kYsY2ynZdg=="]]}, "dan": |
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{"trustees": ["ted", "dan"], "sender": "alice", "msgid": |
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"DA14341968415407", "pads": {"dan": [[None, None, None, None, |
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"nvo/RQ==", "7ebk", None, "Pxs=", "jvG/+ffvzr8=", "KayU9Q==", "8H1Z", |
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"nKdz", "5OI="], [None, "GmA=", "GoX2", "/OSQHAtXxw==", "d+Ej94lL", |
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None, None, "fsw=", None, None, None, None, None, None, |
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"AO7bwt+F+A=="], [None, "YXBKZdaztixJ", "YEYD2Z1b7bPBXg==", |
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"NvKU5HQ=", None, "6w==", "085ZT+nx", "bao=", None, "FwiAXEih3EA=", |
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"ICk=", "r1l+FQ=="], [None, None, None, "jY3i", None, None, |
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"R/kWIDE=", "O01B", None, None, "84c=", None, "kq8PNCM=", "UCXLPs2F"], |
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["h2cYGdo=", "wIE=", None, None, "nl/J", None]]}, "recipients": |
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["bob", "carol"], "subject": "Hey, sport. YOU connect the dots."}, |
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"__to__": {"trustees": ["ted", "dan"], "sender": "alice", "msgid": |
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"DA14341968415407", "pads": {"dan": [[None, None, None, None, |
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"nvo/RQ==", "7ebk", None, "Pxs=", "jvG/+ffvzr8=", "KayU9Q==", "8H1Z", |
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"nKdz", "5OI="], [None, "GmA=", "GoX2", "/OSQHAtXxw==", "d+Ej94lL", |
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None, None, "fsw=", None, None, None, None, None, None, |
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"AO7bwt+F+A=="], [None, "YXBKZdaztixJ", "YEYD2Z1b7bPBXg==", |
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"NvKU5HQ=", None, "6w==", "085ZT+nx", "bao=", None, "FwiAXEih3EA=", |
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"ICk=", "r1l+FQ=="], [None, None, None, "jY3i", None, None, |
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"R/kWIDE=", "O01B", None, None, "84c=", None, "kq8PNCM=", "UCXLPs2F"], |
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["h2cYGdo=", "wIE=", None, None, "nl/J", None]], "ted": [["xWusIv5F", |
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"29q4dg==", "zAa7Rc4K", "pqY7HvIXqHA1RRWMhA==", None, None, |
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"lSXD+g==", None, None, None, None, None, None], ["sJDRbhyB", None, |
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None, None, None, "uDs=", "jWhA", None, "6Ho=", "J4OQCp0=", "39g=", |
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"JuhF", "kgS41A==", "fR+t8fE=", None], ["5ZCA", None, None, None, |
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"Wco=", None, None, None, "L+mR1ohML2foHA0=", None, None, None], |
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["sbuL", "qhM8EFAOWM0=", "oxO8cg==", None, "/eYQidGv/nc=", "epMLVQA=", |
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None, None, "i5dv", "Dh9fFA==", None, "gNKi", "lrEPMyg=", None], |
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[None, None, "+UoxOmBAFcvrFg==", "Xo4=", None, "4f56t0C6WA=="]]}, |
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"recipients": ["bob", "carol"], "subject": "Hey, sport. YOU connect" |
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"the dots."}, "ted": {"trustees": ["ted", "dan"], "sender": "alice", |
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"msgid": "DA14341968415407", "pads": {"ted": [["xWusIv5F", "29q4dg==", |
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"zAa7Rc4K", "pqY7HvIXqHA1RRWMhA==", None, None, "lSXD+g==", None, |
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None, None, None, None, None], ["sJDRbhyB", None, None, None, None, |
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"uDs=", "jWhA", None, "6Ho=", "J4OQCp0=", "39g=", "JuhF", "kgS41A==", |
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"fR+t8fE=", None], ["5ZCA", None, None, None, "Wco=", None, None, |
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None, "L+mR1ohML2foHA0=", None, None, None], ["sbuL", "qhM8EFAOWM0=", |
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"oxO8cg==", None, "/eYQidGv/nc=", "epMLVQA=", None, None, "i5dv", |
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"Dh9fFA==", None, "gNKi", "lrEPMyg=", None], [None, None, |
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"+UoxOmBAFcvrFg==", "Xo4=", None, "4f56t0C6WA=="]]}, "recipients": |
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["bob", "carol"], "subject": "Hey, sport. YOU connect the dots."}} |
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#------ end prefab redaction |
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def testit(): |
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def testit(): |
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"Todo: turn this into proper unit tests, anyone?" |
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"Todo: turn this into proper unit tests, anyone?" |
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print('<!DOCTYPE html><html lang="en"><head><title>Testing DarkenedAges library</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><pre>') |
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print('<!DOCTYPE html>\n<html lang="en"><head><title>Testing DarkenedAges library</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><pre>') |
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print('### Players') |
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print('### Players') |
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for p in getplayers().values(): |
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for p in getplayers().values(): |
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print('\n# {name} ({player},@{twister}):'.format(**p)) |
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print('\n# {name} ({player}, @{twister}):'.format(**p)) |
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print('\n'.join(' '+l for l in textwrap.wrap(p['bio']))) |
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print('\n'.join(' '+l for l in textwrap.wrap(p['bio']))) |
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print('\n\n### Simulating a random selection of {} trustees for msgid #{}'.format(NTRUSTEES,makeid())) |
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print(choosetrustees(exclude=['GCHQ'])) # Wishful thinking ;) |
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print('\n\n### Redacting prefab plaintext (2 trustees)') |
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print('\n\n### Redacting prefab plaintext (2 trustees)') |
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|
plaintext = "Here's the first line,\nfollowed by a second one" |
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plaintext = "Here's the first line, \nfollowed by a second one" |
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redaction = redact(plaintext,2) |
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redaction = redact(plaintext, 'alice', recipients=['bob','carol'], subject='Is this thing on?', k=2) |
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for pad in redaction['pads']: |
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for line in textwrap.wrap(json.dumps(redaction)): print(line) |
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print('\n# pOTP >>>') |
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|
for t in redaction['__public__']['trustees']: |
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|
print(pad) |
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|
print('\n# >>> Unredaction for trustee: {}'.format(t)) |
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print('# >>> Unredaction') |
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print(unredact(redaction['__public__'], redaction[t])) |
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|
print(unredact(redaction['cipher'],pad)) |
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print('\n### >>> integration >>>') |
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|
print('\n### >>> integration >>>') |
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|
|
print(unredact(redaction['cipher'],*redaction['pads'])) |
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|
print(unredact(redaction['__public__'], redaction['__to__'])) |
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|
print('\n\n### Simulating incoming [prefab] ciphertext and conflicting pads') |
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|
|
print('\n\n### Unredaction of prefab message (with conflicting pads)') |
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|
|
for pad in [pad1,pad2]: |
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|
|
for t in prefab['__public__']['trustees']: |
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|
|
print('\n# pOTP >>>') |
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|
|
print('\n# >>> Unredaction for trustee: {}'.format(t)) |
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|
|
#print(json.dumps(pad,indent=4)) |
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|
|
print(unredact(prefab['__public__'], prefab[t])) |
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|
|
print(pad) |
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|
|
print('# >>> Unredaction') |
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|
|
print(unredact(cipher1,pad)) |
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|
|
print('\n### >>> integration >>>') |
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|
|
print('\n### >>> integration >>>') |
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|
|
print(unredact(cipher1,pad1,pad2)) |
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|
|
print(unredact(prefab['__public__'], prefab['__to__'])) |
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|
print('</pre></body></html>') |
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|
print('</pre></body></html>') |
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