a97b1c80b2
and userspace. In userspace, this is accessed through #include <secure.h> In the kernel, this is access through #include <kern/secure.h> There is a unit test for this (hm1) that computes the hmac and compares it to the known value. The salted vesion tested offline. ----- Also, fixed usespace compile issue with not changing KERNEL_SECRET => SECRET.
64 lines
910 B
C
64 lines
910 B
C
#include <stdio.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <kern/secret.h>
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#ifdef HOST
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#include "hostcompat.h"
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#endif
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/* printf variant that is quiet during automated testing */
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int
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tprintf(const char *fmt, ...)
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{
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int chars;
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va_list ap;
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if (SECRET != 0) {
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return 0;
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}
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va_start(ap, fmt);
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chars = vprintf(fmt, ap);
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va_end(ap);
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return chars;
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}
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/* printf variant that is loud during automated testing */
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int
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nprintf(const char *fmt, ...)
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{
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int chars;
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va_list ap;
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if (SECRET == 0) {
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return 0;
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}
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va_start(ap, fmt);
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chars = vprintf(fmt, ap);
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va_end(ap);
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return chars;
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}
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/* printf variant that prepends the kernel secret */
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int
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printsf(const char *fmt, ...)
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{
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int chars;
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va_list ap;
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if (SECRET != 0) {
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printf("%llu: ", (unsigned long long)SECRET);
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}
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va_start(ap, fmt);
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chars = vprintf(fmt, ap);
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va_end(ap);
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return chars;
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}
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