Cryptomator Vault Format 7

cryptomator-vault-format-7.md

Beginning with vault format v7, filenames are encoded with base64url so that name shortenings are less likely. The ciphertext filename threshold has been increased to 220 characters. The ciphertext file layout has been redesigned.

This is an example of the new vault structure:

.
├─ d
│  ├─ BZ
│  │  └─ R4VZSS5PEF7TU3PMFIMON5GJRNBDWA
│  │     ├─ 5TyvCyF255sRtfrIv__83ucADQ==.c9r  # regular file
│  │     ├─ FHTa55bH_sUfVDbEb0gTL9hZ8nho.c9r  # irregular file...
│  │     │  └─ dir.c9r  # ...which is a directory
│  │     ├─ gLeOGMCN358_UBf2Qk9cWCQl.c9r  # irregular file...
│  │     │  └─ symlink.c9r  # ...which is a symlink
│  │     ├─ IjTsXtReTy6bAAuxzLPV9T0k2vg=.c9s  # shortened name...
│  │     │  ├─ contents.c9r  # ...which is a regular file
│  │     │  └─ name.c9s  # ...mapping to this full name
│  │     ├─ q2nx5XeNCenHyQvkFD4mxYNrWpQ=.c9s  # shortened name...
│  │     │  ├─ dir.c9r  # ...which is a directory
│  │     │  └─ name.c9s  # ...mapping to this full name
│  │     ├─ u_JJCJE-T4IH-EBYASUp1u3p7mA=.c9s  # shortened name...
│  │     │  ├─ name.c9s  # ...mapping to this full name
│  │     │  └─ symlink.c9r  # ...which is a symlink
│  │     └─ ...
│  └─ FC
│     └─ ZKZRLZUODUUYTYA4457CSBPZXB5A77
│        └─ ...
├─ masterkey.cryptomator
└─ masterkey.cryptomator.DFD9B248.bkup