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Changelog

The following lists the changes CHARRA received over time.

Changelog 2024-04-03

  • Implemented CHARRA remote attestation using the TAP information model

  • Improved interoperability with tpm2-tools

    • Added bash script to generate an attestation key using tpm2-tools

    • Attester and verifier can deserialize tpm key files generated by tpm2-tools

  • Adjustments to Verifier

    • --attestation-public-key is a new mandatory cli argument

  • Adjustments to Attester

    • --attestation-key is a new mandatory cli argument

Changelog 2024-03-05

  • Adjustments to charra_rim_mgr and parser_util:

    • Updated parser to parse the PCR reference file in a YAML format.

    • Implemented stricter parsing rules

    • Fixed minor bugs

  • Adjustments to Verifier

    • -f or --pcr-file argument is mandatory to run the verifier

    • The specified PCR reference file has to be in this format: FORMAT:PATH

    • The following formats are currently available: yaml

  • Replaced reference-pcrs.txt with reference-pcrs.yml

Changelog 2024-02-20

  • Improved charra_marshaling with QCBOR spiffy decoding

  • Removed cbor_util

Changelog 2023-11-30

  • Adjustments to Dockerfile:

    • Updated dependencies to latest stable versions

    • Created necessary systems folders for the tpm2-tss Feature API (FAPI)

    • Added tpm2-pytss

    • Disabled TSS2 log messages that were producing (unnecessary and) confusing error messages and warnings

    • Added Bash configuration including aliases and a history (saves time typing the commands to build and run CHARRA by simply using the up/down arrow keys to cycle through the commands)

  • Added TPM2 code examples under ~/code-examples, showcasing the use of the TSS2 ESAPI and FAPI with tpm2-tss (C programming language) and tpm2-pytss (Python programming language)

  • Added a script in ~/./test-charra-and-tpm2-tss.sh for compiling and running CHARRA as well as all code examples.

Changelog 2023-05-20

  • Fixed Makefile

  • Fixed Docker Compose

  • Externalized building and installation instructions into INSTALL.md and the changelog into CHANGELOG.md.

  • Minor adjustments

Changelog 2021-03-17

  • Dynamic memory allocation for QCBOR encoded data using malloc(). Thanks, @laurencelundblade.

  • Fixed some bugs

  • Introduced macros for free()'ing heap data.

Changelog 2021-03-16 (v2)

  • Added random nonce generation with mbed TLS in Verifier. Made it configurable whether to use the TPM or mbed TLS to generate the nonce.

  • Added media type CBOR to attestation request in Verifier. Credits go to @mrdeep1.

Changelog 2021-03-16 (v1)

  • Updated README.md to include building tpm2software/tpm2-tss Docker image which CHARRA uses as a basis Reason: recently, the official tpm2software/tpm2-tss Docker images were removed from Docker Hub

  • Added Docker Compose file and description on how to use it to README.md

  • Added .editorconfig file

  • Using most recent stable versions of tpm2-tss and tpm2-tools

  • Added compressed CHARRA SVG logo (*.svgz). See charra-logo.svgz

Changelog 2021-03-10

  • Added support for CoAP large/block-wise data transfers, utilizing latest features of libcoap. This enables CHARRA to send and receive data of arbitrary size. Many thanks to @mrdeep1 for developing and fixing block-wise transfers in libcoap!

  • Console output/logging can be entirely disabled with the disable-log Make switch. Colored logging can be disabled with the disable-log-color Make switch. This allows CHARRA to be used in embedded systems. Example:

    make disable-log=1
make disable-log-color=1

  • For debugging purposes a Make flag address-sanitizer was introduced. Example:

    make address-sanitizer=1

  • For TPM operations a custom TCTI module can be used. For this purpose, the Make flag with-tcti was introduced. If not specified, the default is mssim. Use it like:

    make with-tcti=device

  • To reduce the binary size, a Make flag strip was introduced. It invokes strip --strip-unneeded on the resulting binaries. Example:

    make strip=1

  • Log levels of CHARRA and libcoap can now be specified at runtime, e.g.:

    env LOG_LEVEL_CHARRA=TRACE LOG_LEVEL_COAP=DEBUG bin/verifier

    • Supported CHARRA log levels are: TRACE, DEBUG, INFO, WARN, ERROR, and FATAL.

    • Supported libcoap log levels are: EMERG, ALERT, CRIT, ERR, WARNING, NOTICE, INFO, and DEBUG.

  • CHARRA Dockerfile now uses Ubuntu 20.04 instead of Ubuntu 18.04 as its base image.

  • Added tools for debugging to Dockerfile (tmux, gdb, cgdb, and clang-tools).

  • Graceful exit using SIGINT handlers.

  • Simplified CoAP handling by introducing wrapper functions for libcoap.

  • Updated README.md.

  • CHARRA now has a logo, see charra-logo.svg, charra-logo.png, and charra-logo_small.png.

Changelog 2019-09-19

  • Initial version