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#20117237

chattdls99

MIDE-936 Former Entertainer Disposable Creampie Meat Urinal Miu Nakamura

Release Date	2021-06-13
Length	120 min(s)
Director	----
Maker	MOODYZ
Label	Moodyz Diva
User Rating	(8.40)

0
0

2023-05-24 20:17:55

#19662370

chattdls99

DASS-137 Her Penis Was Bigger Than Mine. Sara Aizawa

Release Date	2023-05-09
Length	120 min(s)
Director	Inugami Ryou
Maker	Das !
Label	Das!
User Rating	(8.00)

0
0

2023-04-24 22:39:29

#19351744

chattdls99

KWBD-339 Kawaii * Pretty Girls' Crazy Anniversary Whole Body Convulsions Endless Pursuit Piston 100 Production

Release Date	2023-03-07
Length	480 min(s)
Director	----
Maker	Kawaii
Label	Kawaii
User Rating

0
0

2023-04-02 19:31:24

#19167061

chattdls99

KWBD-336 65 Productions That Mercilessly Impregnate A Beautiful Girl With A Middle-aged Man's Seeding Press

Release Date	2023-01-03
Length	480 min(s)
Director	----
Maker	Kawaii
Label	Kawaii
User Rating

0
0

2023-03-05 11:43:30

#18366057

chattdls99

Original Topic

[quote=pajacol on 2022-10-03 19:09:00 said:]To all interested: How does R18/DMM streaming work?

The movie is a TS file divided into multiple segments. Each segment is encrypted with AES cipher using 128-bit key in CBC mode. Each movie has unique key that is only accessible if you own a movie. The key for specific movie in both R18 and DMM is the same. CBC mode requires initialization vector (short form: IV) of length 16 bytes (or 128-bits if you prefer counting bits). Each TS segment of specific movie has the same key but unique IV. IV is not a secret: segments are enumerated using natural numbers from 0, 1, 2, ..., to the last TS part, IV for specific TS segment is just TS segment number in big endian format.

Segments URLs.
Each TS segment for specific movie has unique URL to download it from, for example movie AMA-004 part 1, first two segments (they are always counted from 0):
https://cflstc.r18.com/r18/st1:eNurK-CY6LPMs0Fzln9NlYO9VHDRQNJBLL4GvpQDANWDvVRwAUDSQSm+Br6UAwDVLIuAqU-FkWfdeX7s7uH-K5Nb-6ucf43NgDI2FzGMURMT8rCex90jSZV3ea0Apayf/-/cdn/media_b6000000_0.ts
https://cflstc.r18.com/r18/st1:eNurK-CY6LPMs0Fzln9NlYO9VHDRQNJBLL4GvpQDANWDvVRwAUDSQSm+Br6UAwDVLIuAqU-FkWfdeX7s7uH-K5Nb-6ucf43NgDI2FzGMURMT8rCex90jSZV3ea0Apayf/-/cdn/media_b6000000_1.ts
As you can see for specific movie, TS segments differ by a number before .ts ending. URLS for part 2 will be similar:
https://cflstc.r18.com/r18/st1:eNurK-CY6LPMs0Fzln9NlYO9VHDRQNJBLL4GvpQDANWDvVRwLEDSQSm+Br6UAwDVLIuAqU-FkWfdeX7s7uH-K+OPo2qjs8lYY-+91QXgFF0drxu9jWhXAo7SR67Hxe9U/-/cdn/media_b6000000_0.ts
https://cflstc.r18.com/r18/st1:eNurK-CY6LPMs0Fzln9NlYO9VHDRQNJBLL4GvpQDANWDvVRwLEDSQSm+Br6UAwDVLIuAqU-FkWfdeX7s7uH-K+OPo2qjs8lYY-+91QXgFF0drxu9jWhXAo7SR67Hxe9U/-/cdn/media_b6000000_1.ts
...
AES key for this movie is in hex: A24D2CDB0C518FB84B80714FDFE44E10, you can verify this by downloading and decrypting it yourself.
AES key and st1 part of the string remain constant in time. So even a key and st1 string that I saved in 2019 is still valid. This is not true for DMM. In the case of DMM, AES key is also the same all the time, but TS download link is valid for 6 hours only.

Meaning of st1 string.
st1 string in the URL contains information about a movie. It is base64 encoded hex string. Base64 encoded string after decoding to hex is still encrypted with a block cipher of block length 16 bytes in CBC mode. Cipher used remains unknown to me but presumably it is also AES (but could also be Serpent or Twofish or Camellia, etc.). Even though the algorithm is unknown, R18 server still has vulnerabilities that allow decrypting the string. For example movie PPPD-218 has this st1 string: Jwb-dQHw0wON2dvINQtjjyM+XJbBPGiCxsM+3Ogp+pN4oaRgyvsApl6pSP-nsW92mTIJ-N4986b27-K6QJbaBLpryq0JhBDMref9X3kFui4=
The vulnerability that I mentioned is called "padding oracle attack". You can alter st1 string and get response whether your artificailly created string has valid padding. This small information allows you to decrypt whole string, which for the PPPD-218 is (grouped 16 bytes per line):
?=pppd00218:p=sm
p0044:b=300,1000
,2000,3000:a=128
:n=1:nm=2:kid=pp
pd00218
OR (without grouping):
?=pppd00218:p=smp0044:b=300,1000,2000,3000:a=128:n=1:nm=2:kid=pppd00218
I coudn't determine first byte but it isn't that important. You can use padding oracle on any movie title st1 string. You can also deduce IV (not the key!) that was used to encrypt st1 string, which is: ??3CE42519E45D963AD863E9FD53FA8C (again first byte unknown to me).
Due to a mistake that R18/DMM programmers made in September/October 2021 it is possible to generate TS files links for any movie in sd quality. Carefully altering the st1 string allows you to download all encrypted TS segments in hd quality. For example for PPPD-218 you have to use: https://cflstc.r18.com/r18/st1:Jwb-dQHw0wON2dvINQtjjyM+XJbBPGiCxsM+3Ogp+pMjPgCWwTxtgsbDPtzoKfqTeKGkYMr7AKZeqUj-57FvdpkyCfzePfOm9u-yukCW2gS6a8qtCYQQzK3n-V95Bbou/-/cdn/media_b6000000_0.ts changing 0 to 1, then 2, then 3, etc.[/quote]

I tried the tool and it says the movie does not exist. Any thoughts on what I'm doing wrong? Instructions are straightforward forward so no idea. This is for regular movies also not VR ones.

2022-11-06 03:53:34

#18120405

chattdls99

Original Topic

2022-09-25 03:56:49

#18090680

chattdls99

Original Topic

2022-09-22 10:41:52

#18086138

chattdls99

Original Topic

2022-09-22 00:49:35

#17734811

chattdls99

MIAA-695 A Hermaphrodite Girl Commuting To School Ichika Matsumoto Who Got Hard And Fucked So Much She Couldn't Hide It

Release Date	2022-08-16
Length	120 min(s)
Director	Gory Matsuda
Maker	MOODYZ
Label	Minna No Kikatan
User Rating	(8.10)

1
0

2022-08-14 10:56:46

#17568477

chattdls99

RBK-055 Dark Sex Slave ● Rara Kudo

Release Date	2022-08-02
Length	120 min(s)
Director	Usubashi Sui
Maker	Attackers
Label	Ryuu Baku
User Rating	(6.80)

2
0

2022-07-26 01:53:08

#16448127

chattdls99

ATID-506 BBP Rara Kudo, A Girl Who Fell Into A Big Black Penis

Release Date	2022-04-05
Length	120 min(s)
Director	Haga Eitarou
Maker	Attackers
Label	In Mad
User Rating	(7.80)

6
2

2022-03-21 02:49:23

#16263823

chattdls99

UMSO-395 5 Minutes Before I Got Serious! I Will Show You 40 People From 5 Minutes Before The Launch! VOL.03

Release Date	2021-06-13
Length	243 min(s)
Director	----
Maker	K.M.Produce
Label	UMANAMI
User Rating	(5.00)

0
0

2022-03-07 00:24:43

#15192689

chattdls99

BGN-069 Rookie Prestige Exclusive Debut Yu Nagarekawa There Is No Blind Spot In This Beauty!

Release Date	2021-11-05
Length	175 min(s)
Director	----
Maker	Prestige
Label	beginning
User Rating	(7.50)

0
0

2021-11-07 22:30:32

#14119603

chattdls99

ATID-470 Michiru Kujo, A Pure White Model Who Became A Prisoner Of The Black Snake

Release Date	2021-07-07
Length	120 min(s)
Director	Haga Eitarou
Maker	Attackers
Label	In Mad
User Rating	(7.00)

3
1

2021-06-28 13:41:59

#14078048

chattdls99

ATID-470 Michiru Kujo, A Pure White Model Who Became A Prisoner Of The Black Snake

Release Date	2021-07-07
Length	120 min(s)
Director	Haga Eitarou
Maker	Attackers
Label	In Mad
User Rating	(7.00)

3
1

2021-06-22 14:16:03

#13759126

chattdls99

NACX-075 12 Slender Actresses BEST

Release Date	2021-04-01
Length	240 min(s)
Director	----
Maker	Planet Plus
Label	Shichi Ku Ryuu
User Rating	(8.00)

0
0

2021-05-18 07:17:41

#10911874

chattdls99

HONB-183 Video Sales When Two Young Japanese Girls Who Came To Tokyo From The Region And Love HO Were Hooked Up.

Release Date	2020-08-12
Length	158 min(s)
Director	----
Maker	MERCURY (Mercury)
Label	Shodai Shibuya Tokubetsu Tokkou Honbu
User Rating	(6.80)

0
0

2020-08-14 03:51:48

#9337052

chattdls99

DVDMS-443 Absolutely Mischievous Adultery Mischief To The Boss's Daughter Who Should Never Put Out Hands If I Continued To Squid Every Day Innocent Girl I Grew Up To Be A Big Girl Who Asked For Vaginal Cum Shot Myself

Release Date	2019-09-07
Length	160 min(s)
Director	Nagase Swing
Maker	Deeps
Label	Deeps
User Rating	(10.00)

0
0

2020-01-11 12:46:03

#9309545

chattdls99

PARM-146 When I Was A Student I Could Worship My Classmate's Panchira And I Continued To Masturbate Like A Monkey! What?

Release Date	2019-01-25
Length	245 min(s)
Director	----
Maker	Aroma Kikaku
Label	Mousou Chirarizumu
User Rating	(10.00)

0
0

2020-01-08 11:52:36

#9211523

chattdls99

ADN-235 Forgive You ... Brother-in-law's Lust 6

Release Date	2020-01-07
Length	120 min(s)
Director	Nagira Kenzo
Maker	Attackers
Label	Otona No Drama
User Rating	(8.00)

0
0

2019-12-26 00:05:33

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