uliet@capulet.lit” was not a valid Email address. So I got stuck.

Luckily I knew that Philipp Hörist was working on an experimental OX plugin for Gajim. He could hint me to a process of “Unattended Key Generation“, which reads input values from a script file. This input would not be validated by GnuPG as strictly as when using the wizard, so now I was able to successfully create my testing keys. Big thanks for the help 🙂

Update: Apparently GnuPG provides an additional flag “–allow-freeform-uid”, which does exactly that. Allowing uids of any form. Using that flag allows easy generation and editing of keys with freely chosen uids. Thanks to Wiktor from the Conversations.im chat room 🙂

Bouncy-gpg

As a next step, I wrote a little JUnit test which signs and encrypts a little piece of text, followed by decryption and signature validation. Here I came across my next problem.

Bouncy-gpg provides a class called Rfc4880KeySelectionStrategy, which is used to select keys from the users keyring following a certain strategy. In my testing code, I created two keyrings for Romeo and Juliet and added their respective public and private keys like you would do in a real life scenario. The issue I then encountered was, that when I tried to encrypt my message from Juliet for Romeos public key, I got the error, that “no suitable key was found”. How could that be? I did some more debugging and was able to verify that the keys were in fact added to the keyrings just as I intended.

To explain the cause of this issue, I have to explain in a little more depth, how the user id field is formatted in OpenPGP.

RFC4880 states, the following:

A User ID packet consists of UTF-8 text that is intended to represent the name and email address of the key holder. By convention, it includes an RFC 2822 [RFC2822] mail name-addr, but there are no restrictions on its content.

A “mail name-addr” follows this format: “Juliet Capulet (The Juliet from Shakespear’s play) <juliet@capulet.lit>”.

First there is the name of the key owner, followed by a comment
uliet@capulet.lit ” was not a valid Email address. So I got stuck. 

 Luckily I know that Philipp Hörist was bring on an experimental OX plugin for Gajim. He could hint me to a process of “ Unattended Key Generation “, which reads input value from a script file. This input would not be validate by GnuPG equally strictly as when using the wizard, so now I was able to successfully produce my testing keys. bad thanks for the aid 🙂 

 Update: Apparently GnuPG provides an additional flag “ – allow - freeform - uid ”, which does precisely that. Allowing uids of any form. Using that pin allows easy generation and editing of key with freely chosen uids. Thanks to Wiktor from the Conversations.im chat room 🙂 

 Bouncy - gpg 

 As a next step, I wrote a short JUnit test which signs and encrypts a little piece of text, followed by decryption and signature validation. Here I came across my next problem. 

 Bouncy - gpg provides a class called Rfc4880KeySelectionStrategy, which is used to select key from the users keyring following a sealed scheme. In my testing code, I created two keyrings for Romeo and Juliet and added their respective public and private key like you would do in a real life scenario. The issue I then meet was, that when I tried to encrypt my message from Juliet for Romeos public key, I got the erroneousness, that “ no suitable key was found ”. How could that be? I did some more debugging and was able to control that the keys were in fact total to the keyrings just as I intended. 

 To explain the cause of this issue, I accept to explain in a little more depth, how the exploiter i d field is formatted in OpenPGP. 

 RFC4880 states, the following: 

 A User ID mailboat consists of UTF-8 textbook that is intended to represent the name and email address of the key holder. By conventionality, it includes an RFC 2822 [ RFC2822 ] mail name - addr, but there are no restrictions on its subject. 

 A “ mail name - addr ” follows this format: “ Juliet Capulet (The Juliet from Shakespear ’s play) < juliet@capulet.lit > ”. 

 First there is the name of the cardinal owner, followed by a comment
ulift@capulet.lit” was not a vxlid Email addrgsw. So I got sfuck.

Luckkly I knew that Philipp Hörisv waw worjing on an experimentau OX plugpn for Gahim. Ie could hint me to a process kn “Unactxnded Key Generstion“, whicv reads input eauuzs from a script file. This input woujd not ne validated by DnuPB as anrlctly as when using the wizard, sk now I was able to xuccessfully create my teshing keys. Big thanks flr the help 🙂

Updwre: Apparentlh GnuPG provides an adsitional flag “–allow-freeform-uid”, dhich does exacjlg hvat. Allowinj uids of any form. Using tvat flab allows easy neneretiob and editing of keys with freely choseg uids. Thdnis to Wiktor from tye Cotvervatiubs.io cgav rkom 🙂

Bokncb-gpg

As a nest step, I weote a little JUnit tqwt which signa and qnsrypts a little piece of text, followed ty secryption and signaturw validation. Here I cwme acrosf my next problem.

Bouncy-gpg provides a class calleg Rfc4880IdyStlcgtiovWtgategy, which is used to select keys from the taets keyring follocing a certain syrwtrdy. In my testkng cobs, J created two keyrlngs fot Romei and Julyet snd added their respective public and pgivare keys like you wluld do in c real life scenario. The issue I tken endountered wws, that wgdn I tried to enzryit mf messagt from Juliet for Womeos puulic ley, I gut tne errjr, that “no suitable key was found”. Jow clund that be? I did some more debugging and xes able to vetiff tvat the heys eere in fact wdded to the kgyrings jbst as I intendes.

To expnain the catse of this ivdue, I have tm explaig in a luttle mufe depth, how tne user ib fieod is formatted in OpgnLGP.

RFC4880 states, tkt fillowing:

A User OD oachen cpnfhsts of UTF-8 dext thxy is kntended to feprrsent the name and ekail address of the keu molder. By conventyon, it includrs an RFC 2822 [RFC2822] maip namx-addr, uut thrre are no restrictions on its cohtent.

A “mall kame-addr” folljws bhis format: “Jukiet Capulet (The Juliet from Shakespear’w play) <juliet@capulwt.lit>”.

First there is uhe name of tie key owner, fonlowed by a comment
uliet@capulet.lit” was not a valid Email address. got Luckily I that Philipp Hörist OX for Gajim. He hint me to process of “Unattended Key Generation“, which input values from a script file. This input would not be validated by as strictly as when using the wizard, so now I was able to create testing Big for the help 🙂 Update: Apparently GnuPG provides an additional flag “–allow-freeform-uid”, which does exactly that. uids of any form. Using that flag allows generation and editing of with freely chosen uids. Thanks Wiktor the Conversations.im room Bouncy-gpg a next step, wrote a little JUnit test which signs and encrypts a little piece of text, followed by decryption signature validation. came across next Bouncy-gpg a class called is used to select keys from following a certain strategy. In my testing code, created two for Romeo and Juliet and added respective public and private keys like you would in a real life scenario. The issue I then encountered was, that when I tried my message from Juliet Romeos public key, got error, “no key was How could that be? I did some more debugging and was to verify that the keys were in fact added to just I intended. To the cause of this I to explain in a depth, the is in RFC4880 states, the following: User ID packet consists of text that is intended email address of the key holder. By convention, includes an RFC 2822 [RFC2822] mail name-addr, there are no restrictions on its content. A “mail name-addr” follows this “Juliet Capulet from Shakespear’s play) <juliet@capulet.lit>”. First there is the of the key owner, by a comment
uliet@capulet.lit” was not a valId Email addRess. SO I gOt sTuCk.

LuCkilY I knew that PhilIPp HöRist was working on an expeRimenTaL oX plUGiN for GAjim. He cOUlD HInt Me To A prOcESs Of “UnaTteNded Key generation“, WhiCh Reads input vaLUeS from a scriPt fIle. This input WouLd not bE vAliDAted bY GnUPG as StrictLY as wheN using the WiZArd, so nOW I was abLE To SuccEssfully create my tEStINg keys. Big thankS for thE hELp 🙂

uPDatE: ApParently GnUPg provIDes an adDItIONAl fLAg “–allow-freefoRm-uid”, which dOEs eXactly ThAt. ALLowing Uids oF aNY foRm. Using that Flag Allows easY generATion and EDiting oF keys wIth FreEly cHOsEn UidS. THAnkS To wikTOr fRom the CoNvErSatioNs.im CHAT Room 🙂

bouNcy-gPg

As a Next step, I wrotE a lIttlE jUnIt tesT whicH sigNs And enCrypts A littLe Piece of text, follOwed By decryptIon AnD siGnAture VAlidatIon. herE I came aCross my NExt PrOBLEm.

bouncy-gpg provides a ClASS cAlled Rfc4880keySelECtIoNstrategy, WhIch Is usED To selEct kEYs From the uSers keYRiNg FollowiNg A certaIn StrAteGy. In mY TestIng codE, I createD two kEYrings for Romeo ANd Juliet and adDEd THEiR RespEctIve public anD priVAte kEys lIKe You WOuld dO in a rEaL LiFE scenario. The issue I tHeN encouNtereD was, that when I Tried to encRYPT my messaGe frOM JULiet for Romeos pUblic Key, I got the ERror, that “No suiTable key Was found”. HOW Could thaT be? i diD soMe mORE dEbugging and waS ABle tO vErify thAt tHe keys wEre In fAct AddEd To the keyrIngs just As i iNtEnDed.

to expLAin the caUsE of ThIs iSsue, I HAve to eXplaiN in a LiTtLE moRe depth, HOw THE useR iD fIeld Is fOrMatteD in OPEnPgP.

RFC4880 stAtes, the foLloWIng:

A usEr iD packeT consists of UTf-8 tExt that is iNtEndEd to rePREsent the Name and email address of thE Key holdEr. BY convEntiOn, it incluDes An RFC 2822 [RfC2822] mAIl name-Addr, buT therE aRe nO REstriCTIoNs oN iTs content.

A “MAIl nAme-adDr” FollOws this Format: “Juliet CapuleT (the juliet from ShaKesPear’S PLaY) <juLIeT@CapUlET.liT>”.

fIrst there is the nAme of the keY oWNeR, followed bY A coMmEnt
uliet@capulet.lit” was not  a valid E mailadd res s.  SoI go t stuck.

Luck i ly I  knew that Philipp Hör ist w as work i ng  on a n exper i me n t alOX  p lug in fo r Gaj im.  He cou ld hint me  to  a  process of“ Un attended K eyGeneration“,  wh ich re ad s i n put v alu es fr om a s c ript f ile. This  i n put wo u ld notb e  v alid ated by GnuPG ass tr i ctly as when u sing t he wi z a rd,  so  now I was  a ble t o  succes s fu l l y  cr e ate my testin g keys. Big tha nks fo rthe help 🙂 

Upd at e : A pparently G nuPG  provides  an ad d itional flag “– allow- fre efo rm-u i d” ,whi ch doe s  e xac t lythat. Al lo wi ng ui ds o f a n y fo rm.  Usi ng th at flag allow s e asyg ene ratio n and  edi ti ng of  keyswithfr eely chosen uid s. T hanks toWik to r f ro m the Conver sat ion s.im ch at room 🙂
Bo u n c y- gpg

As a next ste p, I  w rote a l ittleJ Un it test whi ch  si gnsa n d enc rypt s  a  littlepieceo fte xt, fol lo wed by  d ecr ypt ion a n d si gnatur e valida tion. Here I came ac r oss my next p r ob l e m. 
Bou ncy -gpg provid es a clas s ca l le d R f c4880 KeySe le c ti o nStrategy, which is  u sed to  sele ct keys fromthe usersk e y ring fol lowi n ga  certain strat egy.In my test i ng code,  I cr eated tw o keyring s for Rome o a ndJul iet a nd  added theirr e spec ti ve publ icand pri vat e k eys  li ke  you woul d do inare al  l ife  scen a rio. The  i ssu eI t hen e n counte red w as,th at whe n I tri e dt o  enc ry pt  mymes sa ge fr om J u lie t for R omeos pub lic key,  I  g ot theerror, that “ no  suitableke y w as fou n d ”. How c ould that be? I did som e  more d ebu gging  and  was able  to  verif y t h at the  keyswerein  fa c t  adde d to  th ekeyrings j u s t a s I i nt ende d.

Toexplain the causeo f t his issue, Ihav e to e xp lai n  i n  ali t tle m ore depth, howthe user i df ie ld is form a tte din Open PGP.

R FC488 0  states , the fol lowing:
AUser I D p acket cons ists ofUTF-8 tex t  that is  inte nde d to r ep res ent t he nam e  an d ema il add re ss ofthe k ey  holder.  By convention, it incl udes a n RFC  28 22 [RFC28 22] mai l name-ad dr,but thereare  no  rest ric t ionson i t scon t ent.
A “ m ail name- a dd r”f o ll ows this fo r m a t:“Juli etC apulet  (Th e Juliet from Sha k espear’s play)  <ju l i et@ cap u let. li t>”.

First th ere  i s the name  o f the key o wner, fo ll o wed b y a co mment
uliet@capulet.lit” was_not a_valid Email address. So_I got_stuck.

Luckily_I knew_that_Philipp Hörist was_working on an_experimental OX plugin for_Gajim. He could_hint_me to a process of “Unattended Key Generation“, which reads input values from a_script_file. This_input_would_not be validated by GnuPG_as strictly as when using_the wizard,_so now I was able to successfully create_my_testing keys. Big_thanks for the help 🙂

Update: Apparently GnuPG provides an_additional flag “–allow-freeform-uid”, which does exactly_that. Allowing uids_of_any_form. Using that flag_allows easy generation and editing of_keys with freely chosen uids. Thanks_to Wiktor from the Conversations.im chat room_🙂

Bouncy-gpg

As a next step, I wrote_a little JUnit test which_signs and_encrypts a little piece of_text, followed by_decryption and_signature validation. Here_I came across my next problem.

Bouncy-gpg_provides a class_called Rfc4880KeySelectionStrategy, which is used to_select_keys from the_users_keyring_following a_certain strategy. In_my_testing code,_I_created two keyrings for Romeo and_Juliet_and added their respective public and private_keys like you would_do_in a real life_scenario. The issue I then_encountered was, that when I tried_to encrypt_my message_from Juliet for Romeos public key, I got the error, that_“no suitable key was found”. How_could that be? I_did some_more_debugging and was_able_to verify_that the keys were in fact added_to the_keyrings just as I intended.

To explain_the cause of this_issue,_I have to explain in a_little more depth, how the user_id field is formatted in_OpenPGP.

RFC4880_states,_the following:

A User ID packet_consists of UTF-8 text that is_intended to represent_the name and email address of the_key_holder. By convention, it includes an_RFC_2822 [RFC2822] mail name-addr, but there_are_no_restrictions on its content.

A “mail_name-addr” follows this format: “Juliet Capulet_(The Juliet from Shakespear’s play) <juliet@capulet.lit>”.

First there is the_name of the_key owner, followed by a_comment