wolfSSL/wolfssl
1
0
Fork 1
mirror of https://github.com/wolfSSL/wolfssl.git synced 2026-01-26 13:12:20 +01:00
Code Issues Packages Projects Releases Wiki Activity

linuxkm/module_hooks.c: in wc_linuxkm_GenerateSeed_IntelRD(), log when RDSEED support is missing, and add verbose logging for generation failures.

Browse Source
This commit is contained in:
Daniel Pouzzner
2025-10-28 15:10:29 -05:00
parent 1d64a4ed8f
commit 097cd576ff
1 changed files with 19 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
linuxkm/module_hooks.c
View File

@@ -369,22 +369,38 @@ int wc_linuxkm_GenerateSeed_IntelRD(struct OS_Seed* os, byte* output, word32 sz)
wc_InitRng_IntelRD();
if (!IS_INTEL_RDSEED(intel_flags))
if (!IS_INTEL_RDSEED(intel_flags)) {
static wolfSSL_Atomic_Int warned_on_missing_RDSEED = WOLFSSL_ATOMIC_INITIALIZER(0);
int expected_warned_on_missing_RDSEED = 0;
if (wolfSSL_Atomic_Int_CompareExchange(
&warned_on_missing_RDSEED, &expected_warned_on_missing_RDSEED, 1))
{
pr_err("ERROR: wc_linuxkm_GenerateSeed_IntelRD() called on CPU without RDSEED support.\n");
}
return -1;
}
for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64),
output += sizeof(word64)) {
ret = IntelRDseed64_r((word64*)output);
if (ret != 0)
if (ret != 0) {
#ifdef WOLFSSL_LINUXKM_VERBOSE_DEBUG
pr_err("ERROR: IntelRDseed64_r() returned code %d.\n", ret);
#endif
return ret;
}
}
if (sz == 0)
return 0;
/* handle unaligned remainder */
ret = IntelRDseed64_r(&rndTmp);
if (ret != 0)
if (ret != 0) {
#ifdef WOLFSSL_LINUXKM_VERBOSE_DEBUG
pr_err("ERROR: IntelRDseed64_r() returned code %d.\n", ret);
#endif
return ret;
}
XMEMCPY(output, &rndTmp, sz);
wc_ForceZero(&rndTmp, sizeof(rndTmp));