[PATCH v8 00/10] crypto: add EC-RDSA (GOST 34.10) algorithm

[Vitaly Chikunov <vt@altlinux.org>]

This patchset changes akcipher API to support ECDSA style signature
verification, augments x509 parser to make it work with EC-RDSA certificates,
and, finally, implements EC-RDSA (GOST 34.10) signature verification and its
integration with IMA.

Special request to Mimi Zohar and David Howells to Ack relevant commits, please.

---
This patchset should be applied over cryptodev tree commit 4e5180eb3d4f

Changes since v7:
- Do not check callback validity in akcipher requests, instead define default
  callbacks on register, suggested by Herbert Xu.
- Sanity checks in crypto_akcipher_maxsize are removed (not needed).
- Sanity checks for `dst' and `dst_len' are removed from verify op (not
  needed in akcipher API and should be checked by a driver).
- Patch "KEYS: report to keyctl only actually supported key ops" is removed,
  as it would affect user-space API.

Changes since (v5-v6):
- set_params API is removed in favor of appending parameters into a key stream,
  as requested by Herbert Xu.
- verify op signature de-kmemdup'ed (as requested by David Howells) in separate
  patch (as requested by Herbert Xu).
- Add forgotten ASN.1 parser files to EC-RDSA patch.
- Tested on x86_64.

Changes since v5:
- Comparison of hash algo by enum id instead of text name, as suggested by
  Thiago Jung Bauermann and Mimi Zohar.

Changes since RFC (v1-v4):
- akcipher set_max_size, encrypt, decrypt, sign, verify callbacks may be
  undefined by the drivers, so their crypto_akcipher_* frontends check for
  their presence before passing the call.
- supported_ops flags are set for keyctl, based on the presence of implemented
  akcipher callbacks.
- Transition to verify2 API is abandoned because raw RSA does not need
  sign/verify ops at all, and we can switch to the new verify in one step.
  For this RSA backends have sign/verify ops removed as they should only
  be used (and actually used only) via PKCS1 driver.
- Verify callback requires digest as the input parameter in src SGL, as
  suggested by Herbert Xu, (instead of a separate parameter, as it was in
  verify2).
- For verify op signature is moved into kmalloc'd memory as suggested by
  Herbert Xu.
- set_params API should be called before set_{pub,priv}_key, thus set_*_key
  knows everything it needs to set they key properly. Also, set_params made
  optional for back compatibility with RSA drivers.
- Public-key cryptography section is created in Kconfig.
- ecc.c is made into separate module object, to be used together by ECDH and
  EC-RDSA.
- EC-RDSA parameters and public key are parsed using asn1_ber_decoder as
  suggested by Stephan Mueller and David Howells.
- Test vectors are added and tests are passing.
- Curves/parameters definitions are split from ecrdsa.c into ecrdsa_defs.h.
- Integration with IMA in asymmetric_verify(). Userspace ima-evm-utils already
  have a patch in the queue to support this. Tested on x86_64.

Vitaly Chikunov (10):
  crypto: akcipher - default implementations for request callbacks
  crypto: rsa - unimplement sign/verify for raw RSA backends
  crypto: akcipher - new verify API for public key algorithms
  KEYS: do not kmemdup digest in {public,tpm}_key_verify_signature
  X.509: parse public key parameters from x509 for akcipher
  crypto: Kconfig - create Public-key cryptography section
  crypto: ecc - make ecc into separate module
  crypto: ecrdsa - add EC-RDSA (GOST 34.10) algorithm
  crypto: ecrdsa - add EC-RDSA test vectors to testmgr
  integrity: support EC-RDSA signatures for asymmetric_verify

 crypto/Kconfig                                |  63 ++--
 crypto/Makefile                               |  10 +-
 crypto/akcipher.c                             |  14 +
 crypto/asymmetric_keys/asym_tpm.c             |  77 +++--
 crypto/asymmetric_keys/public_key.c           | 105 ++++---
 crypto/asymmetric_keys/x509.asn1              |   2 +-
 crypto/asymmetric_keys/x509_cert_parser.c     |  57 +++-
 crypto/ecc.c                                  | 417 +++++++++++++++++++++++++-
 crypto/ecc.h                                  | 153 +++++++++-
 crypto/ecc_curve_defs.h                       |  15 -
 crypto/ecrdsa.c                               | 296 ++++++++++++++++++
 crypto/ecrdsa_defs.h                          | 225 ++++++++++++++
 crypto/ecrdsa_params.asn1                     |   4 +
 crypto/ecrdsa_pub_key.asn1                    |   1 +
 crypto/rsa-pkcs1pad.c                         |  33 +-
 crypto/rsa.c                                  | 109 -------
 crypto/testmgr.c                              |  80 +++--
 crypto/testmgr.h                              | 159 ++++++++++
 drivers/crypto/caam/caampkc.c                 |   2 -
 drivers/crypto/ccp/ccp-crypto-rsa.c           |   2 -
 drivers/crypto/qat/qat_common/qat_asym_algs.c |   2 -
 include/crypto/akcipher.h                     |  54 ++--
 include/crypto/public_key.h                   |   4 +
 include/linux/oid_registry.h                  |  18 ++
 security/integrity/digsig_asymmetric.c        |  11 +-
 25 files changed, 1606 insertions(+), 307 deletions(-)
 create mode 100644 crypto/ecrdsa.c
 create mode 100644 crypto/ecrdsa_defs.h
 create mode 100644 crypto/ecrdsa_params.asn1
 create mode 100644 crypto/ecrdsa_pub_key.asn1

-- 
2.11.0