guest-random header¶
The documentation of QEMU’s qemu/guest-random.h header.
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int
qemu_guest_random_seed_main(const char * optarg, Error ** errp)¶
Parameters
const char * optarg- a non-NULL pointer to a C string
Error ** errp- an error indicator
Description
The optarg value is that which accompanies the -seed argument. This forces qemu_guest_getrandom into deterministic mode.
Returns 0 on success, < 0 on failure while setting *errp.
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uint64_t
qemu_guest_random_seed_thread_part1(void)¶
Parameters
void- no arguments
Description
If qemu_getrandom is in deterministic mode, returns an independent seed for the new thread. Otherwise returns 0.
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void
qemu_guest_random_seed_thread_part2(uint64_t seed)¶
Parameters
uint64_t seed- a value for the new thread.
Description
If qemu_guest_getrandom is in deterministic mode, this stores an independent seed for the new thread. Otherwise a no-op.
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int
qemu_guest_getrandom(void * buf, size_t len, Error ** errp)¶
Parameters
void * buf- a buffer of bytes to be written
size_t len- the number of bytes in buf
Error ** errp- an error indicator
Description
Fills len bytes in buf with random data. This should only be used for data presented to the guest. Host-side crypto services should use qcrypto_random_bytes.
Returns 0 on success, < 0 on failure while setting *errp.
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void
qemu_guest_getrandom_nofail(void * buf, size_t len)¶
Parameters
void * buf- a buffer of bytes to be written
size_t len- the number of bytes in buf
Description
Like qemu_guest_getrandom, but will assert for failure. Use this when there is no reasonable recovery.