RE: [EXTERNAL] Re: Not able to perform FIPS self-tests

"Gahlot, Ashish Kumar" <Ashish-Kumar.Gahlot@xxxxxxxx> · Fri, 11 Feb 2022 06:23:50 +0000

Hi,

Thanks Pauli, the API worked but also I have a callback defined as below which is failing at corrupt phase:

int SelfTestCb(const OSSL_PARAM params[], void *arg)
{
    int ret = 0;
    const OSSL_PARAM *p = NULL;
    const char *phase = NULL;
    const char *type = NULL;
    const char *desc = NULL;
    //BIO *bio_out = BIO_new_file("FipsSelfTestFile.txt", "w");

    p = OSSL_PARAM_locate_const(params, OSSL_PROV_PARAM_SELF_TEST_PHASE);
    if ((p == NULL) || (arg) || (p -> data_type != OSSL_PARAM_UTF8_STRING))
        goto err;
    phase = (const char *)p -> data;

    p = OSSL_PARAM_locate_const(params, OSSL_PROV_PARAM_SELF_TEST_DESC);
    if ((p == NULL) || (p -> data_type != OSSL_PARAM_UTF8_STRING))
        goto err;
    desc = (const char *)p -> data;

    p = OSSL_PARAM_locate_const(params, OSSL_PROV_PARAM_SELF_TEST_TYPE);
    if ((p == NULL) || (p -> data_type != OSSL_PARAM_UTF8_STRING))
        goto err;
    type = (const char *)p ->data;

    /* Do some logging */
    if (strcmp(phase, OSSL_SELF_TEST_PHASE_START) == 0)
        syslog(LOG_NOTICE, "%s : (%s) : ", desc, type);
    if ((strcmp(phase, OSSL_SELF_TEST_PHASE_PASS) == 0)
            || (strcmp(phase, OSSL_SELF_TEST_PHASE_FAIL) ==0))
        syslog(LOG_NOTICE, "%s\n", phase);

    /* Corrupt the SHA1 self-test during the 'corrupt' phase by returning 0 */
    if (strcmp(phase, OSSL_SELF_TEST_PHASE_CORRUPT) == 0){                //
ß--------------THIS FAILS
        syslog(LOG_NOTICE, "%s %s", phase, desc);
        return 0;
        }
    ret = 1;
err:
    return ret;
}

Thanks,
Ashish

From: openssl-users <openssl-users-bounces@xxxxxxxxxxx>
On Behalf Of Dr Paul Dale

Sent: Tuesday, February 8, 2022 1:35 PM

To: openssl-users@xxxxxxxxxxx

Subject: [EXTERNAL] Re: Not able to perform FIPS self-tests

Have you considered using the provided for this: OSSL_PROVIDER_self_test()?

https://www.openssl.org/docs/man3.0/man3/OSSL_PROVIDER.html

Pauli

On 8/2/22 17:41, Gahlot, Ashish Kumar wrote:

Hello All,

I’m trying to execute self-tests that FIPS runs after installation manually by calling the APIs. I’m using code from

https://github.com/openssl/openssl/blob/7cce994d3e57345ba729388b9321d9bf8b661b4f/providers/fips/self_test_kats.c but I’m getting NULL when I’m trying to fetch the encryption algorithm. Is there a way to perform self-tests that FIPS runs after installation
 because I did not find any code in fipsinstall.c where it is directly calling the APIs.

int self_test_digest(const ST_KAT_DIGEST *t, OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{

    int ok = 0;
    unsigned char out[EVP_MAX_MD_SIZE];
    unsigned int out_len = 0;
    EVP_MD_CTX *ctx = EVP_MD_CTX_new();
    EVP_MD *md = EVP_MD_fetch(libctx, t->algorithm, NULL);

    OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_KAT_DIGEST, t->desc);

    if (ctx == NULL)
    {syslog(LOG_NOTICE, "ctx NULL"); goto err;}

    if (md == NULL)
    {syslog(LOG_NOTICE, "md is NULL"); goto err;}    //  <-------------------  This is getting failed!

    if (!EVP_DigestInit_ex(ctx, md, NULL))
    {syslog(LOG_NOTICE, "digest failed"); goto err;}

    if (!EVP_DigestUpdate(ctx, sha1_pt, t->pt_len))
    {syslog(LOG_NOTICE, "digest update failed"); goto err;}

    if (!EVP_DigestFinal(ctx, out, &out_len))
    {syslog(LOG_NOTICE, "digest final failed"); goto err;}

    /* Optional corruption */
    OSSL_SELF_TEST_oncorrupt_byte(st, out);
    for (int i=0; i < (int)t->expected_len; i++)
   {syslog(LOG_NOTICE, "%x", out[i]);}

    if (out_len != t->expected_len
            || memcmp(out, sha1_digest, out_len) != 0)
        goto err;
    ok = 1;
err:
    EVP_MD_free(md);
    EVP_MD_CTX_free(ctx);
    OSSL_SELF_TEST_onend(st, ok);
    return ok;
}

static int self_test_digests(OSSL_LIB_CTX *libctx)
{
    OSSL_SELF_TEST *st = NULL;
    st = OSSL_SELF_TEST_new(SelfTestCb, NULL);
    if (st == NULL)
        syslog(LOG_NOTICE, "OSSL_SELF_TEST_new failed");
    int i, ret = 1;

    for (i = 0; i < (int)OSSL_NELEM(st_kat_digest_tests); ++i) {
        if (!self_test_digest(&st_kat_digest_tests[i], st, libctx))
            ret = 0;
    }
    return ret;
}

if (!EVP_default_properties_enable_fips(libctx,1))
{
                ...
}

self_test_digests(libctx);

Thanks,
Ashish

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