decrypt: illegal escape sequence

[fadnincx]

I automated the decryption of my salary statement using the api and the decryption returned the following error,

dereferenceObject: problem dereferencing object 4: Unescape: illegal escape sequence \> detected: <<BD>k<C3>.<8B><CB>N^Z^H^C<A6><B5><99>|^@\><BB>>

I'm able to replicate this error using the CLI pdfcpu decrypt -vv -upw [password] -opw [password] salery.pdf salery_decrypted.pdf

Output:

writing salery_decrypted.pdf...
...
 Fatal: Unescape: illegal escape sequence \> detected: <�k�.��N���|\>�>
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.Unescape
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/string.go:173
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.decryptString
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/crypto.go:1041
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.decryptDeepObject
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/crypto.go:1176
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.decryptDeepObject
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/crypto.go:1155
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.dict
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:1647
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.ParseObject
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:1752
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.dereferenceObject
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:2331
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.dereferenceObjects
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:2433
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.dereferenceXRefTable
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:2512
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.Read
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:80
github.com/pdfcpu/pdfcpu/pkg/api.ReadContext
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/api.go:48
github.com/pdfcpu/pdfcpu/pkg/api.readAndValidate
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/api.go:107
github.com/pdfcpu/pdfcpu/pkg/api.readValidateAndOptimize
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/api.go:130
github.com/pdfcpu/pdfcpu/pkg/api.Optimize
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/optimize.go:38
github.com/pdfcpu/pdfcpu/pkg/api.Decrypt
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/crypto.go:96
github.com/pdfcpu/pdfcpu/pkg/api.DecryptFile
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/crypto.go:145
github.com/pdfcpu/pdfcpu/pkg/cli.Decrypt
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/cli/cli.go:47
github.com/pdfcpu/pdfcpu/pkg/cli.processEncryption
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/cli/process.go:114
github.com/pdfcpu/pdfcpu/pkg/cli.Process
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/cli/process.go:35
main.process
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/process.go:102
main.processDecryptCommand
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/process.go:535
main.commandMap.process
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/cmd.go:143
main.main
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/main.go:55
runtime.main
	/Users/horstrutter/gotip/src/runtime/proc.go:255
runtime.goexit
	/Users/horstrutter/gotip/src/runtime/asm_amd64.s:1581
dereferenceObject: problem dereferencing object 4
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.dereferenceObject
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:2333
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.dereferenceObjects
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:2433
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.dereferenceXRefTable
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:2512
github.com/pdfcpu/pdfcpu/pkg/pdfcpu.Read
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/pdfcpu/read.go:80
github.com/pdfcpu/pdfcpu/pkg/api.ReadContext
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/api.go:48
github.com/pdfcpu/pdfcpu/pkg/api.readAndValidate
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/api.go:107
github.com/pdfcpu/pdfcpu/pkg/api.readValidateAndOptimize
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/api.go:130
github.com/pdfcpu/pdfcpu/pkg/api.Optimize
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/optimize.go:38
github.com/pdfcpu/pdfcpu/pkg/api.Decrypt
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/crypto.go:96
github.com/pdfcpu/pdfcpu/pkg/api.DecryptFile
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/api/crypto.go:145
github.com/pdfcpu/pdfcpu/pkg/cli.Decrypt
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/cli/cli.go:47
github.com/pdfcpu/pdfcpu/pkg/cli.processEncryption
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/cli/process.go:114
github.com/pdfcpu/pdfcpu/pkg/cli.Process
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/pkg/cli/process.go:35
main.process
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/process.go:102
main.processDecryptCommand
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/process.go:535
main.commandMap.process
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/cmd.go:143
main.main
	/Users/horstrutter/go/src/github.com/pdfcpu/pdfcpu/cmd/pdfcpu/main.go:55
runtime.main
	/Users/horstrutter/gotip/src/runtime/proc.go:255
runtime.goexit
	/Users/horstrutter/gotip/src/runtime/asm_amd64.s:1581

The pdf decrypts fine in all pdf viewers I've tried (Evince, Chrome, ...)

[hhrutter]

Thanks for reporting this!

[hhrutter]

This is fixed with the latest commit.
Please test if this works for you and report back any issues.
Thank you for using pdfcpu 💚

[fadnincx]

Works perfectly 👍
Thanks for the fast fix!