challenger-send-post.sh - challenger - OAuth 2.0-based authentication service that validates user can receive messages at a certain address

challenger-send-post.sh (12613B)
      1 #!/bin/bash
      2 # This file is in the public domain.
      3 set -eux
      4 
      5 # You need to provide these (set in environment).
      6 # PINGEN_CLIENT_ID=
      7 # PINGEN_CLIENT_SECRET=
      8 # PINGEN_ORG_ID=
      9 if [ -x "$PINGEN_CLIENT_ID" ]
     10 then
     11     echo "PINGEN_CLIENT_ID not sent in environment"
     12     exit 1
     13 fi
     14 if [ -x "$PINGEN_CLIENT_SECRET" ]
     15 then
     16     echo "PINGEN_CLIENT_SECRET not sent in environment"
     17     exit 1
     18 fi
     19 if [ -x "$PINGEN_ORG_ID" ]
     20 then
     21     echo "PINGEN_ORG_ID not sent in environment"
     22     exit 1
     23 fi
     24 
     25 ENDPOINT="https://api.pingen.com"
     26 LOGS="$HOME/authorization-post.log"
     27 ERRORS="$HOME/authorization-post.err"
     28 
     29 MESSAGE=$(cat -)
     30 ADDR="$1"
     31 # We'll use "tr" to filter out anything that could be a problem in LaTeX.
     32 # Name of business or individual, possibly with "Attn. $INDIVIDUAL_NAME"
     33 CONTACT_NAME=$(echo "$ADDR" | jq -r .CONTACT_NAME | tr '|`~!"<>[]%_^#$&@\\{}' . )
     34 # Multi-line address
     35 ADDRESS_LINES=$(echo "$ADDR" | jq -r .ADDRESS_LINES)
     36 # This will just be the 2-letter country code
     37 ADDRESS_COUNTRY=$(echo "$ADDR" | jq -r .ADDRESS_COUNTRY | tr '|`~!"<>[]%_^#$&@\\{}' . )
     38 
     39 case "$ADDRESS_COUNTRY"
     40 in
     41 	AF)
     42 		COUNTRY='Afghanistan'
     43 		;;
     44 	AX)
     45 		COUNTRY='Åland Islands'
     46 		;;
     47 	AL)
     48 		COUNTRY='Albania'
     49 		;;
     50 	DZ)
     51 		COUNTRY='Algeria'
     52 		;;
     53 	AS)
     54 		COUNTRY='American Samoa'
     55 		;;
     56 	AD)
     57 		COUNTRY='Andorra'
     58 		;;
     59 	AO)
     60 		COUNTRY='Angola'
     61 		;;
     62 	AI)
     63 		COUNTRY='Anguilla'
     64 		;;
     65 	AQ)
     66 		COUNTRY='Antarctica'
     67 		;;
     68 	AG)
     69 		COUNTRY='Antigua \\\& Barbuda'
     70 		;;
     71 	AR)
     72 		COUNTRY='Argentina'
     73 		;;
     74 	AM)
     75 		COUNTRY='Armenia'
     76 		;;
     77 	AW)
     78 		COUNTRY='Aruba'
     79 		;;
     80 	AU)
     81 		COUNTRY='Australia'
     82 		;;
     83 	AT)
     84 		COUNTRY='Austria'
     85 		;;
     86 	AZ)
     87 		COUNTRY='Azerbaijan'
     88 		;;
     89 	BS)
     90 		COUNTRY='Bahamas'
     91 		;;
     92 	BH)
     93 		COUNTRY='Bahrain'
     94 		;;
     95 	BD)
     96 		COUNTRY='Bangladesh'
     97 		;;
     98 	BB)
     99 		COUNTRY='Barbados'
    100 		;;
    101 	BY)
    102 		COUNTRY='Belarus'
    103 		;;
    104 	BE)
    105 		COUNTRY='Belgium'
    106 		;;
    107 	BZ)
    108 		COUNTRY='Belize'
    109 		;;
    110 	BJ)
    111 		COUNTRY='Benin'
    112 		;;
    113 	BM)
    114 		COUNTRY='Bermuda'
    115 		;;
    116 	BT)
    117 		COUNTRY='Bhutan'
    118 		;;
    119 	BO)
    120 		COUNTRY='Bolivia'
    121 		;;
    122 	BA)
    123 		COUNTRY='Bosnia \\\& Herzegovina'
    124 		;;
    125 	BW)
    126 		COUNTRY='Botswana'
    127 		;;
    128 	BV)
    129 		COUNTRY='Bouvet Island'
    130 		;;
    131 	BR)
    132 		COUNTRY='Brazil'
    133 		;;
    134 	IO)
    135 		COUNTRY='British Indian Ocean Territory'
    136 		;;
    137 	VG)
    138 		COUNTRY='British Virgin Islands'
    139 		;;
    140 	BN)
    141 		COUNTRY='Brunei'
    142 		;;
    143 	BG)
    144 		COUNTRY='Bulgaria'
    145 		;;
    146 	BF)
    147 		COUNTRY='Burkina Faso'
    148 		;;
    149 	BI)
    150 		COUNTRY='Burundi'
    151 		;;
    152 	KH)
    153 		COUNTRY='Cambodia'
    154 		;;
    155 	CM)
    156 		COUNTRY='Cameroon'
    157 		;;
    158 	CA)
    159 		COUNTRY='Canada'
    160 		;;
    161 	CV)
    162 		COUNTRY='Cape Verde'
    163 		;;
    164 	BQ)
    165 		COUNTRY='Caribbean Netherlands'
    166 		;;
    167 	KY)
    168 		COUNTRY='Cayman Islands'
    169 		;;
    170 	CF)
    171 		COUNTRY='Central African Republic'
    172 		;;
    173 	TD)
    174 		COUNTRY='Chad'
    175 		;;
    176 	CL)
    177 		COUNTRY='Chile'
    178 		;;
    179 	CN)
    180 		COUNTRY='China'
    181 		;;
    182 	CX)
    183 		COUNTRY='Christmas Island'
    184 		;;
    185 	CC)
    186 		COUNTRY='Cocos'
    187 		;;
    188 	CO)
    189 		COUNTRY='Colombia'
    190 		;;
    191 	KM)
    192 		COUNTRY='Comoros'
    193 		;;
    194 	CG)
    195 		COUNTRY='Congo - Brazzaville'
    196 		;;
    197 	CD)
    198 		COUNTRY='Congo - Kinshasa'
    199 		;;
    200 	CK)
    201 		COUNTRY='Cook Islands'
    202 		;;
    203 	CR)
    204 		COUNTRY='Costa Rica'
    205 		;;
    206 	CI)
    207 #shellcheck disable=SC1112
    208 		COUNTRY='Côte d’Ivoire'
    209 		;;
    210 	HR)
    211 		COUNTRY='Croatia'
    212 		;;
    213 	CU)
    214 		COUNTRY='Cuba'
    215 		;;
    216 	CW)
    217 		COUNTRY='Curaçao'
    218 		;;
    219 	CY)
    220 		COUNTRY='Cyprus'
    221 		;;
    222 	CZ)
    223 		COUNTRY='Czechia'
    224 		;;
    225 	DK)
    226 		COUNTRY='Denmark'
    227 		;;
    228 	DJ)
    229 		COUNTRY='Djibouti'
    230 		;;
    231 	DM)
    232 		COUNTRY='Dominica'
    233 		;;
    234 	DO)
    235 		COUNTRY='Dominican Republic'
    236 		;;
    237 	EC)
    238 		COUNTRY='Ecuador'
    239 		;;
    240 	EG)
    241 		COUNTRY='Egypt'
    242 		;;
    243 	SV)
    244 		COUNTRY='El Salvador'
    245 		;;
    246 	GQ)
    247 		COUNTRY='Equatorial Guinea'
    248 		;;
    249 	ER)
    250 		COUNTRY='Eritrea'
    251 		;;
    252 	EE)
    253 		COUNTRY='Estonia'
    254 		;;
    255 	SZ)
    256 		COUNTRY='Eswatini'
    257 		;;
    258 	ET)
    259 		COUNTRY='Ethiopia'
    260 		;;
    261 	FK)
    262 		COUNTRY='Falkland Islands'
    263 		;;
    264 	FO)
    265 		COUNTRY='Faroe Islands'
    266 		;;
    267 	FJ)
    268 		COUNTRY='Fiji'
    269 		;;
    270 	FI)
    271 		COUNTRY='Finland'
    272 		;;
    273 	FR)
    274 		COUNTRY='France'
    275 		;;
    276 	GF)
    277 		COUNTRY='French Guiana'
    278 		;;
    279 	PF)
    280 		COUNTRY='French Polynesia'
    281 		;;
    282 	TF)
    283 		COUNTRY='French Southern Territories'
    284 		;;
    285 	GA)
    286 		COUNTRY='Gabon'
    287 		;;
    288 	GM)
    289 		COUNTRY='Gambia'
    290 		;;
    291 	GE)
    292 		COUNTRY='Georgia'
    293 		;;
    294 	DE)
    295 		COUNTRY='Germany'
    296 		;;
    297 	GH)
    298 		COUNTRY='Ghana'
    299 		;;
    300 	GI)
    301 		COUNTRY='Gibraltar'
    302 		;;
    303 	GR)
    304 		COUNTRY='Greece'
    305 		;;
    306 	GL)
    307 		COUNTRY='Greenland'
    308 		;;
    309 	GD)
    310 		COUNTRY='Grenada'
    311 		;;
    312 	GP)
    313 		COUNTRY='Guadeloupe'
    314 		;;
    315 	GU)
    316 		COUNTRY='Guam'
    317 		;;
    318 	GT)
    319 		COUNTRY='Guatemala'
    320 		;;
    321 	GG)
    322 		COUNTRY='Guernsey'
    323 		;;
    324 	GN)
    325 		COUNTRY='Guinea'
    326 		;;
    327 	GW)
    328 		COUNTRY='Guinea-Bissau'
    329 		;;
    330 	GY)
    331 		COUNTRY='Guyana'
    332 		;;
    333 	HT)
    334 		COUNTRY='Haiti'
    335 		;;
    336 	HM)
    337 		COUNTRY='Heard \\\& McDonald Islands'
    338 		;;
    339 	HN)
    340 		COUNTRY='Honduras'
    341 		;;
    342 	HK)
    343 		COUNTRY='Hong Kong SAR China'
    344 		;;
    345 	HU)
    346 		COUNTRY='Hungary'
    347 		;;
    348 	IS)
    349 		COUNTRY='Iceland'
    350 		;;
    351 	IN)
    352 		COUNTRY='India'
    353 		;;
    354 	ID)
    355 		COUNTRY='Indonesia'
    356 		;;
    357 	IR)
    358 		COUNTRY='Iran'
    359 		;;
    360 	IQ)
    361 		COUNTRY='Iraq'
    362 		;;
    363 	IE)
    364 		COUNTRY='Ireland'
    365 		;;
    366 	IM)
    367 		COUNTRY='Isle of Man'
    368 		;;
    369 	IL)
    370 		COUNTRY='Israel'
    371 		;;
    372 	IT)
    373 		COUNTRY='Italy'
    374 		;;
    375 	JM)
    376 		COUNTRY='Jamaica'
    377 		;;
    378 	JP)
    379 		COUNTRY='Japan'
    380 		;;
    381 	JE)
    382 		COUNTRY='Jersey'
    383 		;;
    384 	JO)
    385 		COUNTRY='Jordan'
    386 		;;
    387 	KZ)
    388 		COUNTRY='Kazakhstan'
    389 		;;
    390 	KE)
    391 		COUNTRY='Kenya'
    392 		;;
    393 	KI)
    394 		COUNTRY='Kiribati'
    395 		;;
    396 	KW)
    397 		COUNTRY='Kuwait'
    398 		;;
    399 	KG)
    400 		COUNTRY='Kyrgyzstan'
    401 		;;
    402 	LA)
    403 		COUNTRY='Laos'
    404 		;;
    405 	LV)
    406 		COUNTRY='Latvia'
    407 		;;
    408 	LB)
    409 		COUNTRY='Lebanon'
    410 		;;
    411 	LS)
    412 		COUNTRY='Lesotho'
    413 		;;
    414 	LR)
    415 		COUNTRY='Liberia'
    416 		;;
    417 	LY)
    418 		COUNTRY='Libya'
    419 		;;
    420 	LI)
    421 		COUNTRY='Liechtenstein'
    422 		;;
    423 	LT)
    424 		COUNTRY='Lithuania'
    425 		;;
    426 	LU)
    427 		COUNTRY='Luxembourg'
    428 		;;
    429 	MO)
    430 		COUNTRY='Macao SAR China'
    431 		;;
    432 	MG)
    433 		COUNTRY='Madagascar'
    434 		;;
    435 	MW)
    436 		COUNTRY='Malawi'
    437 		;;
    438 	MY)
    439 		COUNTRY='Malaysia'
    440 		;;
    441 	MV)
    442 		COUNTRY='Maldives'
    443 		;;
    444 	ML)
    445 		COUNTRY='Mali'
    446 		;;
    447 	MT)
    448 		COUNTRY='Malta'
    449 		;;
    450 	MH)
    451 		COUNTRY='Marshall Islands'
    452 		;;
    453 	MQ)
    454 		COUNTRY='Martinique'
    455 		;;
    456 	MR)
    457 		COUNTRY='Mauritania'
    458 		;;
    459 	MU)
    460 		COUNTRY='Mauritius'
    461 		;;
    462 	YT)
    463 		COUNTRY='Mayotte'
    464 		;;
    465 	MX)
    466 		COUNTRY='Mexico'
    467 		;;
    468 	FM)
    469 		COUNTRY='Micronesia'
    470 		;;
    471 	MD)
    472 		COUNTRY='Moldova'
    473 		;;
    474 	MC)
    475 		COUNTRY='Monaco'
    476 		;;
    477 	MN)
    478 		COUNTRY='Mongolia'
    479 		;;
    480 	ME)
    481 		COUNTRY='Montenegro'
    482 		;;
    483 	MS)
    484 		COUNTRY='Montserrat'
    485 		;;
    486 	MA)
    487 		COUNTRY='Morocco'
    488 		;;
    489 	MZ)
    490 		COUNTRY='Mozambique'
    491 		;;
    492 	MM)
    493 		COUNTRY='Myanmar'
    494 		;;
    495 	NA)
    496 		COUNTRY='Namibia'
    497 		;;
    498 	NR)
    499 		COUNTRY='Nauru'
    500 		;;
    501 	NP)
    502 		COUNTRY='Nepal'
    503 		;;
    504 	NL)
    505 		COUNTRY='Netherlands'
    506 		;;
    507 	NC)
    508 		COUNTRY='New Caledonia'
    509 		;;
    510 	NZ)
    511 		COUNTRY='New Zealand'
    512 		;;
    513 	NI)
    514 		COUNTRY='Nicaragua'
    515 		;;
    516 	NE)
    517 		COUNTRY='Niger'
    518 		;;
    519 	NG)
    520 		COUNTRY='Nigeria'
    521 		;;
    522 	NU)
    523 		COUNTRY='Niue'
    524 		;;
    525 	NF)
    526 		COUNTRY='Norfolk Island'
    527 		;;
    528 	KP)
    529 		COUNTRY='North Korea'
    530 		;;
    531 	MK)
    532 		COUNTRY='North Macedonia'
    533 		;;
    534 	MP)
    535 		COUNTRY='Northern Mariana Islands'
    536 		;;
    537 	NO)
    538 		COUNTRY='Norway'
    539 		;;
    540 	OM)
    541 		COUNTRY='Oman'
    542 		;;
    543 	PK)
    544 		COUNTRY='Pakistan'
    545 		;;
    546 	PW)
    547 		COUNTRY='Palau'
    548 		;;
    549 	PS)
    550 		COUNTRY='Palestinian Territories'
    551 		;;
    552 	PA)
    553 		COUNTRY='Panama'
    554 		;;
    555 	PG)
    556 		COUNTRY='Papua New Guinea'
    557 		;;
    558 	PY)
    559 		COUNTRY='Paraguay'
    560 		;;
    561 	PE)
    562 		COUNTRY='Peru'
    563 		;;
    564 	PH)
    565 		COUNTRY='Philippines'
    566 		;;
    567 	PN)
    568 		COUNTRY='Pitcairn Islands'
    569 		;;
    570 	PL)
    571 		COUNTRY='Poland'
    572 		;;
    573 	PT)
    574 		COUNTRY='Portugal'
    575 		;;
    576 	PR)
    577 		COUNTRY='Puerto Rico'
    578 		;;
    579 	QA)
    580 		COUNTRY='Qatar'
    581 		;;
    582 	RE)
    583 		COUNTRY='Réunion'
    584 		;;
    585 	RO)
    586 		COUNTRY='Romania'
    587 		;;
    588 	RU)
    589 		COUNTRY='Russia'
    590 		;;
    591 	RW)
    592 		COUNTRY='Rwanda'
    593 		;;
    594 	WS)
    595 		COUNTRY='Samoa'
    596 		;;
    597 	SM)
    598 		COUNTRY='San Marino'
    599 		;;
    600 	ST)
    601 		COUNTRY='São Tomé \\\& Príncipe'
    602 		;;
    603 	SA)
    604 		COUNTRY='Saudi Arabia'
    605 		;;
    606 	SN)
    607 		COUNTRY='Senegal'
    608 		;;
    609 	RS)
    610 		COUNTRY='Serbia'
    611 		;;
    612 	SC)
    613 		COUNTRY='Seychelles'
    614 		;;
    615 	SL)
    616 		COUNTRY='Sierra Leone'
    617 		;;
    618 	SG)
    619 		COUNTRY='Singapore'
    620 		;;
    621 	SX)
    622 		COUNTRY='Sint Maarten'
    623 		;;
    624 	SK)
    625 		COUNTRY='Slovakia'
    626 		;;
    627 	SI)
    628 		COUNTRY='Slovenia'
    629 		;;
    630 	SB)
    631 		COUNTRY='Solomon Islands'
    632 		;;
    633 	SO)
    634 		COUNTRY='Somalia'
    635 		;;
    636 	ZA)
    637 		COUNTRY='South Africa'
    638 		;;
    639 	GS)
    640 		COUNTRY='South Georgia \\\& South Sandwich Islands'
    641 		;;
    642 	KR)
    643 		COUNTRY='South Korea'
    644 		;;
    645 	SS)
    646 		COUNTRY='South Sudan'
    647 		;;
    648 	ES)
    649 		COUNTRY='Spain'
    650 		;;
    651 	LK)
    652 		COUNTRY='Sri Lanka'
    653 		;;
    654 	BL)
    655 		COUNTRY='St. Barthélemy'
    656 		;;
    657 	SH)
    658 		COUNTRY='St. Helena'
    659 		;;
    660 	KN)
    661 		COUNTRY='St. Kitts \\\& Nevis'
    662 		;;
    663 	LC)
    664 		COUNTRY='St. Lucia'
    665 		;;
    666 	MF)
    667 		COUNTRY='St. Martin'
    668 		;;
    669 	PM)
    670 		COUNTRY='St. Pierre \\\& Miquelon'
    671 		;;
    672 	VC)
    673 		COUNTRY='St. Vincent \\\& Grenadines'
    674 		;;
    675 	SD)
    676 		COUNTRY='Sudan'
    677 		;;
    678 	SR)
    679 		COUNTRY='Suriname'
    680 		;;
    681 	SJ)
    682 		COUNTRY='Svalbard \\\& Jan Mayen'
    683 		;;
    684 	SE)
    685 		COUNTRY='Sweden'
    686 		;;
    687 	CH)
    688 		COUNTRY='Switzerland'
    689 		;;
    690 	SY)
    691 		COUNTRY='Syria'
    692 		;;
    693 	TW)
    694 		COUNTRY='Taiwan'
    695 		;;
    696 	TJ)
    697 		COUNTRY='Tajikistan'
    698 		;;
    699 	TZ)
    700 		COUNTRY='Tanzania'
    701 		;;
    702 	TH)
    703 		COUNTRY='Thailand'
    704 		;;
    705 	TL)
    706 		COUNTRY='Timor-Leste'
    707 		;;
    708 	TG)
    709 		COUNTRY='Togo'
    710 		;;
    711 	TK)
    712 		COUNTRY='Tokelau'
    713 		;;
    714 	TO)
    715 		COUNTRY='Tonga'
    716 		;;
    717 	TT)
    718 		COUNTRY='Trinidad \\\& Tobago'
    719 		;;
    720 	TN)
    721 		COUNTRY='Tunisia'
    722 		;;
    723 	TR)
    724 		COUNTRY='Turkey'
    725 		;;
    726 	TM)
    727 		COUNTRY='Turkmenistan'
    728 		;;
    729 	TC)
    730 		COUNTRY='Turks \\\& Caicos Islands'
    731 		;;
    732 	TV)
    733 		COUNTRY='Tuvalu'
    734 		;;
    735 	UM)
    736 		COUNTRY='U.S. Outlying Islands'
    737 		;;
    738 	VI)
    739 		COUNTRY='U.S. Virgin Islands'
    740 		;;
    741 	UG)
    742 		COUNTRY='Uganda'
    743 		;;
    744 	UA)
    745 		COUNTRY='Ukraine'
    746 		;;
    747 	AE)
    748 		COUNTRY='United Arab Emirates'
    749 		;;
    750 	GB)
    751 		COUNTRY='United Kingdom'
    752 		;;
    753 	US)
    754 		COUNTRY='United States'
    755 		;;
    756 	UY)
    757 		COUNTRY='Uruguay'
    758 		;;
    759 	UZ)
    760 		COUNTRY='Uzbekistan'
    761 		;;
    762 	VU)
    763 		COUNTRY='Vanuatu'
    764 		;;
    765 	VA)
    766 		COUNTRY='Vatican City'
    767 		;;
    768 	VE)
    769 		COUNTRY='Venezuela'
    770 		;;
    771 	VN)
    772 		COUNTRY='Vietnam'
    773 		;;
    774 	WF)
    775 		COUNTRY='Wallis \\\& Futuna'
    776 		;;
    777 	EH)
    778 		COUNTRY='Western Sahara'
    779 		;;
    780 	YE)
    781 		COUNTRY='Yemen'
    782 		;;
    783 	ZM)
    784 		COUNTRY='Zambia'
    785 		;;
    786 	ZW)
    787 		COUNTRY='Zimbabwe'
    788 		;;
    789     *)
    790         echo "ERROR: Country code '${ADDRESS_COUNTRY}' not recognized" 1>&2
    791         COUNTRY="${ADDRESS_COUNTRY}"
    792         ;;
    793 esac
    794 
    795 # Convert new lines to " " for LaTeX. excluding trailing new-line
    796 # at the end if present:
    797 CONTACT_TEX=$(echo -n "${CONTACT_NAME%$'\n'}" | awk '{printf "%s ", $0}')
    798 # Convert new lines to "\\" for LaTeX, and escape problematic characters,
    799 # but leave "\\" intact.
    800 ADDRESS_TEX=$(echo -n "${ADDRESS_LINES%$'\n'}" | awk '{printf "%s\\\\\\\\", $0}' | tr '|`~!"<>[]%_^#$&@{}' . | sed 's/\\\\/@@ESCAPED@@/g; s/\\./\./g; s/@@ESCAPED@@/\\\\/g')
    801 
    802 
    803 MYDIR=$(mktemp -d /tmp/authorization-post-XXXXXX)
    804 cd "$MYDIR"
    805 sed -e "s|%NAME%|$CONTACT_TEX|g" \
    806 	    -e "s|%ADDRESS_TEX%|$ADDRESS_TEX|g" \
    807 	    -e "s/%COUNTRY%/$COUNTRY/g" > input.tex <<EOF
    808 \NeedsTeXFormat{LaTeX2e}
    809 \documentclass[fontsize=11pt,a4paper]{scrlttr2}
    810 \makeatletter
    811 \KOMAoptions{foldmarks=off}
    812 \makeatother
    813 \setplength{toaddrhpos}{3cm}
    814 \setkomavar{subject}{Address validation}
    815 \setkomavar{signature}{Taler Operations AG, c/o Berner Fachhochschule, H\"oheweg 80, 2502 Biel/Bienne}
    816 \date{\today}
    817 \begin{document}
    818 \begin{letter}{%NAME%\\\\ %ADDRESS_TEX% %COUNTRY%}
    819 \opening{To whom it may concern,}
    820 EOF
    821 echo "$MESSAGE" >> input.tex
    822 cat - >> input.tex <<EOF
    823 \closing{Best regards}
    824 \end{letter}
    825 \end{document}
    826 EOF
    827 pdflatex input.tex > "$MYDIR/pdflatex.out" 2> "$MYDIR/pdflatex.err"
    828 
    829 REPLY=$(curl \
    830 	    -s \
    831 	    -X POST \
    832 	    -H "Content-Type: application/x-www-form-urlencoded" \
    833 	    --data-urlencode "grant_type=client_credentials" \
    834 	    --data-urlencode "client_id=$PINGEN_CLIENT_ID" \
    835 	    --data-urlencode "client_secret=$PINGEN_CLIENT_SECRET" \
    836 	    --data-urlencode "scope=letter" \
    837 	    https://identity.pingen.com/auth/access-tokens)
    838 
    839 ACCESS_TOKEN=$(echo "$REPLY" | jq -r .access_token)
    840 
    841 REPLY=$(curl -s \
    842     -X GET "$ENDPOINT/file-upload" \
    843     -H  "Authorization: Bearer $ACCESS_TOKEN")
    844 ATTRS=$(echo "$REPLY" | jq .data.attributes)
    845 UPLOAD_URL=$(echo "$ATTRS" | jq -r .url)
    846 URL_SIG=$(echo "$ATTRS" | jq -r .url_signature)
    847 
    848 STATUS=$(curl -s \
    849      -X PUT \
    850      -T input.pdf \
    851      "$UPLOAD_URL" \
    852      -o "$MYDIR/upload-status.txt" \
    853      -w "%{http_code}" -s)
    854 
    855 case "$STATUS" in
    856     200)
    857         ;;
    858     201)
    859         ;;
    860     204)
    861         ;;
    862     *)
    863         echo "Failed to upload letter: $STATUS" >> "$ERRORS"
    864         cat "$MYDIR/upload-status.txt" >> "$ERRORS"
    865         exit 1;
    866         ;;
    867 esac
    868 
    869 
    870 REQUEST="$(jq -n '
    871     {   data: {
    872         type: "letters",
    873 	attributes: {
    874 	  file_original_name: "input.pdf",
    875 	  file_url: $UPLOAD_URL,
    876 	  file_url_signature: $URL_SIG,
    877 	  address_position: "left",
    878 	  delivery_product: "cheap",
    879 	  print_mode: "duplex",
    880 	  auto_send: true,
    881  	  print_spectrum: "grayscale"
    882         } }
    883     }' \
    884     --arg UPLOAD_URL "$UPLOAD_URL" \
    885     --arg URL_SIG "$URL_SIG" \
    886   )"
    887 
    888 STATUS=$(curl -s \
    889      --request POST \
    890      --url "$ENDPOINT/organisations/${PINGEN_ORG_ID}/letters" \
    891      --header "Content-Type: application/vnd.api+json" \
    892      --header "Authorization: Bearer $ACCESS_TOKEN" \
    893      -d "$REQUEST" \
    894      -o "$MYDIR/final-reply.txt" \
    895      -w "%{http_code}" -s)
    896 case "$STATUS" in
    897     201)
    898         cat "$MYDIR/final-reply.txt" >> "$LOGS"
    899         ;;
    900     *)
    901         echo "Failed to add letter: $STATUS" >> "$ERRORS"
    902         cat "$MYDIR/final-reply.txt" >> "$ERRORS"
    903         exit 1;
    904         ;;
    905 esac
    906 
    907 rm -r "$MYDIR"
    908 exit 0
	challenger OAuth 2.0-based authentication service that validates user can receive messages at a certain address
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