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[S390] zcrypt: add support for large random numbers

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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>
This commit is contained in:
Ralph Wuerthner
2008-04-17 07:46:15 +02:00
committed by Heiko Carstens
parent 893f112866
commit 2f7c8bd6dc
4 changed files with 327 additions and 1 deletions
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8
drivers/s390/crypto/zcrypt_api.h
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@@ -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 {