01f2d3ea2c
If SECRET_TESTING is defined, the function will compute and print a salt value and the hmac/sha256 hash of the message, which can be verified from the test161 server.
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
#include <kern/secret.h>
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#include <types.h>
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#include <thread.h>
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#include <test.h>
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#include <lib.h>
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#include <kern/secure.h>
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/*
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* Common success function for kernel tests. If SECRET_TESTING is defined,
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* ksecprintf will compute the hmac/sha256 hash of any message using the
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* shared secret and a random salt value. The (secure) server also knows
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* the secret and can verify the message was generated by a trusted source.
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* The salt value prevents against replay attacks.
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*/
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int
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success(bool status, const char * secret, const char * name) {
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if (status == SUCCESS) {
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return ksecprintf(secret, "SUCCESS", name);
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} else {
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return ksecprintf(secret, "FAIL", name);
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}
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}
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#ifndef SECRET_TESTING
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int
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ksecprintf(const char * secret, const char * msg, const char * name)
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{
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(void)secret;
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return kprintf("%s: %s\n", name, msg);
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}
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#else
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int
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ksecprintf(const char * secret, const char * msg, const char * name)
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{
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char *hash;
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char *salt;
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int res;
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res = hmac_salted(msg, strlen(msg), secret, strlen(secret), &hash, &salt);
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if (res)
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return -res;
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res = kprintf("(%s, %s, %s, %s: %s)\n", name, hash, salt, name, msg);
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kfree(hash);
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kfree(salt);
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return res;
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}
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#endif
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/*
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* Helper functions used by testing and problem driver code
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* to establish better mixtures of threads.
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*/
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void
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random_yielder(uint32_t max_yield_count)
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{
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uint32_t i;
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for (i = 0; i < random() % max_yield_count; i++) {
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thread_yield();
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}
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}
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void
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random_spinner(uint32_t max_spin_count)
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{
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uint32_t i;
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volatile int spin;
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for (i = 0; i < random() % max_spin_count; i++) {
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spin += i;
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}
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}
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