[v3,0/4] crypto: add rsa pss support for x509

Message

Hongbo Li April 7, 2021, 3:49 a.m. UTC

From: Hongbo Li <[e-mail]>

This series of patches adds support for x509 cert signed by RSA
with PSS encoding method. RSA PSS is described in rfc8017.

Patch1 make x509 support rsa pss encoding and parse hash parameter.

Patch2 add rsa pss template.

Patch3 add test vector for rsa pss.

Patch4 is the rsa-pss's ima patch.

Test by the following script, it tests different saltlen, hash, mgfhash.

keyctl newring test @u

while :; do
    for modbits in 1024 2048 4096; do
        if [ $modbits -eq 1024 ]; then
            saltlen=(-1 -2 0 20 32 48 64 94)
        elif [ $modbits -eq 2048 ]; then
            saltlen=(-1 -2 0 20 32 48 64 222)
        else
            saltlen=(-1 -2 0 20 32 48 64 478)
        fi

        for slen in ${saltlen[@]}; do
            for hash in sha1 sha224 sha256 sha384 sha512; do
                for mgfhash in sha1 sha224 sha256 sha384 sha512; do
                    certfile="cert.der"
                    echo slen $slen
                    openssl req \
                            -x509 \
                            -${hash} \
                            -newkey rsa:$modbits \
                            -keyout key.pem \
                            -days 365 \
                            -subj '/CN=test' \
                            -nodes \
                            -sigopt rsa_padding_mode:pss \
                            -sigopt rsa_mgf1_md:$mgfhash \
                            -sigopt rsa_pss_saltlen:${slen} \
                            -outform der \
                            -out ${certfile} 2>/dev/null

                    exp=0
                    id=$(keyctl padd asymmetric testkey %keyring:test < "${certfile}")
                    rc=$?
                    if [ $rc -ne $exp ]; then
                        case "$exp" in
                            0) echo "Error: Could not load rsa-pss certificate!";;
                        esac
                        echo "modbits $modbits sha: $hash mgfhash $mgfhash saltlen: $slen"
                        exit 1
                    else
                        case "$rc" in
                            0) echo "load cert: keyid: $id modbits $modbits hash: $hash mgfhash $mgfhash saltlen $slen"
                        esac
                    fi
                done
            done
        done
    done
done

Best Regards

Hongbo

v2-v3:
  -add the crypto/rsa-psspad.c which is missed in previous patch

v1->v2:
  -rebase patches to cryptodev/master to fix the issues that
   reported-by: kernel test robot <[e-mail]>

Hongbo Li (4):
  x509: add support for rsa-pss
  crypto: support rsa-pss encoding
  crypto: add rsa pss test vector
  ima: add support for rsa pss verification

 crypto/Makefile                                |   7 +-
 crypto/asymmetric_keys/Makefile                |   7 +-
 crypto/asymmetric_keys/public_key.c            |   5 +
 crypto/asymmetric_keys/x509_cert_parser.c      |  71 ++++-
 crypto/asymmetric_keys/x509_rsapss_params.asn1 |  19 ++
 crypto/rsa-psspad.c                            | 398 +++++++++++++++++++++++++
 crypto/rsa.c                                   |  14 +-
 crypto/rsa_helper.c                            | 127 ++++++++
 crypto/testmgr.c                               |   7 +
 crypto/testmgr.h                               |  90 ++++++
 include/crypto/internal/rsa.h                  |  25 +-
 include/linux/oid_registry.h                   |   2 +
 security/integrity/digsig_asymmetric.c         |  18 +-
 13 files changed, 770 insertions(+), 20 deletions(-)
 create mode 100644 crypto/asymmetric_keys/x509_rsapss_params.asn1
 create mode 100644 crypto/rsa-psspad.c