diff options
| author |   Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com> | 2015-09-04 09:57:24 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-14 14:31:59 +0200 |
| commit | 1330a1258dc20caa5961b07aa62482793d6f2ecf (patch) | |
| tree | dddc2a4438dc63b69ab1aad5d411032b4a206f5a /drivers/s390 | |
| parent | s390/numa: write kernel message when emu_size has been increased (diff) | |
| download | linux-dev-1330a1258dc20caa5961b07aa62482793d6f2ecf.tar.xz linux-dev-1330a1258dc20caa5961b07aa62482793d6f2ecf.zip | |
s390/zcrypt: enable odd RSA modulus sizes in CRT format
In the past only even modulus sizes were allowed for RSA keys in
CRT format. This restriction was based on limited RSA key generation
on older crypto adapters that provides only even modulus sizes. This
restriction is not valid any more.
Revoke restrictions that crypto requests can be serviced with odd
RSA modulus length in CRT format.
Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_api.c | 3 | ||||
| -rw-r--r-- | drivers/s390/crypto/zcrypt_cca_key.h | 2 | ||||
| -rw-r--r-- | drivers/s390/crypto/zcrypt_msgtype50.c | 2 | ||||
| -rw-r--r-- | drivers/s390/crypto/zcrypt_pcica.c | 2 |
4 files changed, 4 insertions, 5 deletions
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c index 4eb45546a3aa..a9603ebbc1f8 100644 --- a/drivers/s390/crypto/zcrypt_api.c +++ b/drivers/s390/crypto/zcrypt_api.c @@ -472,8 +472,7 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt) unsigned long long z1, z2, z3; int rc, copied; - if (crt->outputdatalength < crt->inputdatalength || - (crt->inputdatalength & 1)) + if (crt->outputdatalength < crt->inputdatalength) return -EINVAL; /* * As long as outputdatalength is big enough, we can set the diff --git a/drivers/s390/crypto/zcrypt_cca_key.h b/drivers/s390/crypto/zcrypt_cca_key.h index 1f42f103c761..ca0cdbe46368 100644 --- a/drivers/s390/crypto/zcrypt_cca_key.h +++ b/drivers/s390/crypto/zcrypt_cca_key.h @@ -291,7 +291,7 @@ static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt, memset(key, 0, sizeof(*key)); - short_len = crt->inputdatalength / 2; + short_len = (crt->inputdatalength + 1) / 2; long_len = short_len + 8; pad_len = -(3*long_len + 2*short_len) & 7; key_len = 3*long_len + 2*short_len + pad_len + crt->inputdatalength; diff --git a/drivers/s390/crypto/zcrypt_msgtype50.c b/drivers/s390/crypto/zcrypt_msgtype50.c index 334e282f255b..6c9af1332967 100644 --- a/drivers/s390/crypto/zcrypt_msgtype50.c +++ b/drivers/s390/crypto/zcrypt_msgtype50.c @@ -248,7 +248,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev, unsigned char *p, *q, *dp, *dq, *u, *inp; mod_len = crt->inputdatalength; - short_len = mod_len / 2; + short_len = (mod_len + 1) / 2; /* * CEX2A and CEX3A w/o FW update can handle requests up to diff --git a/drivers/s390/crypto/zcrypt_pcica.c b/drivers/s390/crypto/zcrypt_pcica.c index 7a743f4c646c..2f220208da63 100644 --- a/drivers/s390/crypto/zcrypt_pcica.c +++ b/drivers/s390/crypto/zcrypt_pcica.c @@ -138,7 +138,7 @@ static int ICACRT_msg_to_type4CRT_msg(struct zcrypt_device *zdev, int mod_len, short_len, long_len; mod_len = crt->inputdatalength; - short_len = mod_len / 2; + short_len = (mod_len + 1) / 2; long_len = mod_len / 2 + 8; if (mod_len <= 128) { |