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path: root/internal/cryptocore/cryptocore.go
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2021-09-28cryptocore: simplify declarationsJakob Unterwurzacher
Reported by codacity: internal/cryptocore/cryptocore.go Minor icon MINOR Code Style should omit type AEADTypeEnum from declaration of var BackendAESSIV; it will be inferred from the right-hand side var BackendAESSIV AEADTypeEnum = AEADTypeEnum{"AES-SIV-512", "Go", siv_aead.NonceSize} Minor icon MINOR Code Style should omit type AEADTypeEnum from declaration of var BackendXChaCha20Poly1305; it will be inferred from the right-hand side var BackendXChaCha20Poly1305 AEADTypeEnum = AEADTypeEnum{"XChaCha20-Poly1305", "Go", chacha20poly1305.NonceSizeX} Minor icon MINOR Code Style should omit type AEADTypeEnum from declaration of var BackendXChaCha20Poly1305OpenSSL; it will be inferred from the right-hand side var BackendXChaCha20Poly1305OpenSSL AEADTypeEnum = AEADTypeEnum{"XChaCha20-Poly1305", "OpenSSL", chacha20poly1305.NonceSizeX} Found 2 possible new issues internal/cryptocore/cryptocore.go Minor icon MINOR Code Style should omit type AEADTypeEnum from declaration of var BackendOpenSSL; it will be inferred from the right-hand side var BackendOpenSSL AEADTypeEnum = AEADTypeEnum{"AES-GCM-256", "OpenSSL", 16} Minor icon MINOR Code Style should omit type AEADTypeEnum from declaration of var BackendGoGCM; it will be inferred from the right-hand side var BackendGoGCM AEADTypeEnum = AEADTypeEnum{"AES-GCM-256", "Go", 16}
2021-09-28cryptocore: disentangle algorithm / library implementation nameJakob Unterwurzacher
Used in gocryptfs-xray, and will also be used in -info.
2021-09-10cli: drop -forcedecode flagJakob Unterwurzacher
The rewritten openssl backend does not support this flag anymore, and it was inherently dangerour. Drop it (ignored for compatibility)
2021-09-08Make -openssl also apply to xchachaJakob Unterwurzacher
Now that stupidgcm supports xchacha, make it available on mount.
2021-09-07stupidgcm: normalize constructor namingJakob Unterwurzacher
New() -> NewAES256GCM() Also add missing NewChacha20poly1305 constructor in without_openssl.go.
2021-09-07-speed: add XChaCha20-Poly1305-OpenSSLJakob Unterwurzacher
$ ./gocryptfs -speed gocryptfs v2.1-56-gdb1466f-dirty.stupidchacha; go-fuse v2.1.1-0.20210825171523-3ab5d95a30ae; 2021-09-02 go1.17 linux/amd64 AES-GCM-256-OpenSSL 529.53 MB/s AES-GCM-256-Go 833.85 MB/s (selected in auto mode) AES-SIV-512-Go 155.27 MB/s XChaCha20-Poly1305-Go 715.33 MB/s (use via -xchacha flag) XChaCha20-Poly1305-OpenSSL 468.94 MB/s https://github.com/rfjakob/gocryptfs/issues/452
2021-08-23cryptocore: add NonceSize to AEADTypeEnumJakob Unterwurzacher
Have the information in one centralized place, and access it from main as needed.
2021-08-23Add partial XChaCha20-Poly1305 support (mount flag only)Jakob Unterwurzacher
Mount flag only at the moment, not saved to gocryptfs.conf. https://github.com/rfjakob/gocryptfs/issues/452
2021-08-23go mod: declare module version v2Jakob Unterwurzacher
Our git version is v2+ for some time now, but go.mod still declared v1. Hopefully making both match makes https://pkg.go.dev/github.com/rfjakob/gocryptfs/v2 work. All the import paths have been fixed like this: find . -name \*.go | xargs sed -i s%github.com/rfjakob/gocryptfs/%github.com/rfjakob/gocryptfs/v2/%
2021-08-21cryptocore: drop IVLen helper varJakob Unterwurzacher
The IVLen var seems be a net loss in clarity. Drop it. Also add comments and normalize error messages.
2021-06-21Improve startup debug outputJakob Unterwurzacher
The startup debug output was very verbose but still missing some effective crypto settings.
2018-02-28tlog: stop embedding log.Logger to prevent mistakesJakob Unterwurzacher
A few places have called tlog.Warn.Print, which directly calls into log.Logger due to embedding, losing all features of tlog. Stop embedding log.Logger to make sure the internal functions cannot be called accidentially and fix (several!) instances that did.
2018-02-18cryptocore: make AEADTypeEnum values explicitJakob Unterwurzacher
We now print the number in a debug message, so define the numeric values explicitely instead of using iota. This way you don't have to understand how iota works to find out what the number means. Lack of understanding of how iota works is also the reason why the numbers start at 3 (to keep the current behavoir).
2018-02-18cryptocore: zero derived keysJakob Unterwurzacher
Zero the HKDF-derived keys when we don't need them anymore, and let the variable run of of scope. https://github.com/rfjakob/gocryptfs/issues/211
2018-02-18cryptocore, main: add two commentsJakob Unterwurzacher
While reading the code, I had to think about what it does, so add a comment that explains it.
2018-02-18stupidgcm: create private copy of the keyJakob Unterwurzacher
Relieves the caller from worrying about whether they can overwrite the key.
2018-02-18main: try to wipe cryptocore's secret keys on unmountJakob Unterwurzacher
Raise the bar for recovering keys from memory. https://github.com/rfjakob/gocryptfs/issues/211
2017-08-21Fix misspellings reported by goreportcard.comJakob Unterwurzacher
https://goreportcard.com/report/github.com/rfjakob/gocryptfs#misspell
2017-08-11main: purge masterkey from memory as soon as possibleJakob Unterwurzacher
Remove the "Masterkey" field from fusefrontend.Args because it should not be stored longer than neccessary. Instead pass the masterkey as a separate argument to the filesystem initializers. Then overwrite it with zeros immediately so we don't have to wait for garbage collection. Note that the crypto implementation still stores at least a masterkey-derived value, so this change makes it harder, but not impossible, to extract the encryption keys from memory. Suggested at https://github.com/rfjakob/gocryptfs/issues/137
2017-05-27cryptocore: improve comments and add tests for hkdfDeriveJakob Unterwurzacher
These should make it easier to re-implement the key derivation that was enabled with the "HKDF" feature flag.
2017-04-29fix golint complaintsJakob Unterwurzacher
2017-04-23Add -forcedecodedanim7
Force decode of encrypted files even if the integrity check fails, instead of failing with an IO error. Warning messages are still printed to syslog if corrupted files are encountered. It can be useful to recover files from disks with bad sectors or other corrupted media. Closes https://github.com/rfjakob/gocryptfs/pull/102 .
2017-03-05full stack: implement HKDF supportJakob Unterwurzacher
...but keep it disabled by default for new filesystems. We are still missing an example filesystem and CLI arguments to explicitely enable and disable it.
2017-03-05configfile: switch to 128-bit IVs for master key encryptionJakob Unterwurzacher
There is no security reason for doing this, but it will allow to consolidate the code once we drop compatibility with gocryptfs v1.2 (and earlier) filesystems.
2017-03-05Drop Go 1.4 compatability code everywhereJakob Unterwurzacher
Yields a nice reduction in code size.
2017-03-05cryptocore: rename "BackendTypeEnum" -> "AEADTypeEnum"Jakob Unterwurzacher
There are two independent backends, one for name encryption, the other one, AEAD, for file content. "BackendTypeEnum" only applies to AEAD (file content), so make that clear in the name.
2017-03-05cryptocore: use eme v1.1 interfaceJakob Unterwurzacher
Version 1.1 of the EME package (github.com/rfjakob/eme) added a more convenient interface. Use it. Note that you have to upgrade your EME package (go get -u)!
2016-12-10Replace all calls to naked panic() with log.Panic()Jakob Unterwurzacher
We want all panics to show up in the syslog.
2016-10-09reverse: add panics against API abuseJakob Unterwurzacher
These should help prevent later programming errors.
2016-10-04lint fixesValient Gough
2016-10-04cryptocore: rename "gcm" variable to generic "aeadCipher"Jakob Unterwurzacher
As we now also support AES-SIV the old name is no longer correct.
2016-10-04cryptocore: derive 512-bit key for AES-SIVJakob Unterwurzacher
AES-SIV uses 1/2 of the key for authentication, 1/2 for encryption, so we need a 64-byte key for AES-256. Derive it from the master key by hashing it with SHA-512.
2016-09-26reverse: switch from GCM-SIV to AES-SIVv1.1-beta1Jakob Unterwurzacher
GCM-SIV is not yet finalized, and the reference implemenation is painfully slow at about 2 MB/s. Switch to AES-SIV.
2016-09-25contentenc: add GCM-SIV supportJakob Unterwurzacher
Also add ReverseDummyNonce nonce generation.
2016-09-25cryptocore: add support for GCM-SIVJakob Unterwurzacher
2016-07-31cryptocore: comment why 96-bit IVs are still supportedJakob Unterwurzacher
2016-07-06Add godoc comments to all internal packagesJakob Unterwurzacher
2016-05-04stupidgcm: completely replace spacemonkeygo/opensslJakob Unterwurzacher
2016-05-04cryptocore: add API testsJakob Unterwurzacher
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