Decrypts Ableton DRM-protected *.aif files
This works on *nix like systems. Replace apt by your package provider and it should work. On Windows the easiest way to make this work is using Ubuntu Subsystem (TODO doc).
Install dependencies, then run the build file.
# Installs gcc, make, etc.
sudo apt install build-essential
# Installs libssl for crypto functions
sudo apt install libssl-dev
# ffmpeg
sudo apt install ffmpeg
# Runs the build script
./build.shThe build script might fail with this error:
/usr/bin/ld: AbleChunk.o: in function `AbleChunk::decryptKey(Array<unsigned char> const&)':
/home/alex/Projects/abledecoder/AbleChunk.cpp:24: undefined reference to `EVP_CIPHER_CTX_new'
/usr/bin/ld: /home/alex/Projects/abledecoder/AbleChunk.cpp:26: undefined reference to `EVP_bf_cbc'
Then change the library linker flags order in the build script, placing -lcrypto -lssl at the end of the compiling command (see comment in build.sh).
On modern version of Openssl (>3.0), some older algorythm are no longer supported by default. When running abledecoder, it will fail with this error:
40A7D0B9637F0000:error:0308010C:digital envelope routines:inner_evp_generic_fetch:unsupported:../crypto/evp/evp_fetch.c:349:Global default library context, Algorithm (BF-CBC : 11), Properties ()
error decrypting data
reading file examples/Raylon-190-Full.aif failed
To resolve this, enable legacy provider.
Find the Openssl config location by running this command
$ openssl version -d
OPENSSLDIR: "/usr/lib/ssl"
$ ls /usr/lib/ssl
certs misc openssl.cnf private
Edit the 'openssl.cnf' file and update 2 sections:
# List of providers to load
[provider_sect]
default = default_sect
to
# List of providers to load
[provider_sect]
default = default_sect
**legacy = legacy_sect**
and this:
[default_sect]
# activate = 1
to
[default_sect]
activate = 1
[legacy_sect]
activate = 1
You can verify that the legacy provider is now activate:
$ openssl list -providers
Providers:
default
name: OpenSSL Default Provider
version: 3.0.2
status: active
legacy
name: OpenSSL Legacy Provider
version: 3.0.2
status: active
# Runs the abledecoder
./abledecoder my-aif-file.aif my-aif-file-decoded.aif
# Runs the abledecoder on a hierrachy of folder
./rabledecoder my-aif-folder my-aif-folder-decodedIf you want to convert the aif to wav (requires ffmpeg), will create .wav files along the .aif files:
./aif_to_wav my-aif-folder-decodedYou can then listen to the wav, make a selection, and save as m3u playlist, then execute the m3u playlist:
./m3u_copy my-m3u-playlist.m3u my-destination-folder