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| author |   Ralph Wuerthner <rwuerthn@de.ibm.com> | 2008-04-17 07:46:15 +0200 |
|---|---|---|
| committer |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-04-17 07:47:02 +0200 |
| commit | 2f7c8bd6dc6540aa3275c0ad9f657401985c00e9 (patch) | |
| tree | 12cb12d661424d332ad960113c8849b3579e7e6a /drivers/s390/crypto/zcrypt_api.h | |
| parent | [S390] hw_random: allow rng_dev_read() to return hardware errors. (diff) | |
| download | linux-dev-2f7c8bd6dc6540aa3275c0ad9f657401985c00e9.tar.xz linux-dev-2f7c8bd6dc6540aa3275c0ad9f657401985c00e9.zip | |
[S390] zcrypt: add support for large random numbers
This patch allows user space applications to access large amounts of
truly random data. The random data source is the build-in hardware
random number generator on the CEX2C cards.
Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'drivers/s390/crypto/zcrypt_api.h')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_api.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h index de4877ee618f..0e948528a73a 100644 --- a/drivers/s390/crypto/zcrypt_api.h +++ b/drivers/s390/crypto/zcrypt_api.h @@ -100,6 +100,13 @@ struct ica_z90_status { #define ZCRYPT_CEX2C 5 #define ZCRYPT_CEX2A 6 +/** + * Large random numbers are pulled in 4096 byte chunks from the crypto cards + * and stored in a page. Be carefull when increasing this buffer due to size + * limitations for AP requests. + */ +#define ZCRYPT_RNG_BUFFER_SIZE 4096 + struct zcrypt_device; struct zcrypt_ops { @@ -107,6 +114,7 @@ struct zcrypt_ops { long (*rsa_modexpo_crt)(struct zcrypt_device *, struct ica_rsa_modexpo_crt *); long (*send_cprb)(struct zcrypt_device *, struct ica_xcRB *); + long (*rng)(struct zcrypt_device *, char *); }; struct zcrypt_device { |