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70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/*
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* Noise generation for PuTTY's cryptographic random number
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* generator.
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*/
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#include <Types.h>
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#include <Timer.h>
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#include "putty.h"
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#include "ssh.h"
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#include "storage.h"
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/*
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* This function is called once, at PuTTY startup, and will do some
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* seriously silly things like listing directories and getting disk
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* free space and a process snapshot.
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*/
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void noise_get_heavy(void (*func) (void *, int))
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{
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read_random_seed(func);
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/* Update the seed immediately, in case another instance uses it. */
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random_save_seed();
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}
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void random_save_seed(void)
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{
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int len;
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void *data;
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if (random_active) {
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random_get_savedata(&data, &len);
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write_random_seed(data, len);
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sfree(data);
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}
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}
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/*
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* This function is called every time the random pool needs
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* stirring, and will acquire the system time.
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*/
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void noise_get_light(void (*func) (void *, int))
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{
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UnsignedWide utc;
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Microseconds(&utc);
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func(&utc, sizeof(utc));
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}
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/*
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* This function is called on every keypress or mouse move, and
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* will add the current time to the noise pool. It gets the scan
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* code or mouse position passed in, and adds that too.
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*/
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void noise_ultralight(unsigned long data)
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{
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UnsignedWide utc;
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Microseconds(&utc);
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random_add_noise(&utc, sizeof(utc));
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random_add_noise(&data, sizeof(data));
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}
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/*
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* Local Variables:
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* c-file-style: "simon"
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* End:
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*/
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