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fipsinstall: add -pedantic option
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This adds a -pedantic option to fipsinstall that adjusts the various
settings to ensure strict FIPS compliance rather than backwards
compatibility.

Reviewed-by: Shane Lontis <[email protected]>
Reviewed-by: Tomas Mraz <[email protected]>
(Merged from openssl#20752)
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@paulidale
paulidale committed Apr 19, 2023
1 parent 1adc45b commit bc2a422
Showing 1 changed file with 64 additions and 39 deletions.
103 changes: 64 additions & 39 deletions apps/fipsinstall.c
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@ static int quiet = 0;

typedef enum OPTION_choice {
OPT_COMMON,
OPT_IN, OPT_OUT, OPT_MODULE,
OPT_IN, OPT_OUT, OPT_MODULE, OPT_PEDANTIC,
OPT_PROV_NAME, OPT_SECTION_NAME, OPT_MAC_NAME, OPT_MACOPT, OPT_VERIFY,
OPT_NO_LOG, OPT_CORRUPT_DESC, OPT_CORRUPT_TYPE, OPT_QUIET, OPT_CONFIG,
OPT_NO_CONDITIONAL_ERRORS,
Expand All @@ -46,6 +46,7 @@ typedef enum OPTION_choice {
const OPTIONS fipsinstall_options[] = {
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
{"pedantic", OPT_PEDANTIC, '-', "Set options for strict FIPS compliance"},
{"verify", OPT_VERIFY, '-',
"Verify a config file instead of generating one"},
{"module", OPT_MODULE, '<', "File name of the provider module"},
Expand Down Expand Up @@ -81,6 +82,41 @@ const OPTIONS fipsinstall_options[] = {
{NULL}
};

typedef struct {
unsigned int self_test_onload : 1;
unsigned int conditional_errors : 1;
unsigned int security_checks : 1;
unsigned int tls_prf_ems_check : 1;
unsigned int drgb_no_trunc_dgst : 1;
} FIPS_OPTS;

/* Pedantic FIPS compliance */
static const FIPS_OPTS pedantic_opts = {
1, /* self_test_onload */
1, /* conditional_errors */
1, /* security_checks */
1, /* tls_prf_ems_check */
1, /* drgb_no_trunc_dgst */
};

/* Default FIPS settings for backward compatibility */
static FIPS_OPTS fips_opts = {
1, /* self_test_onload */
1, /* conditional_errors */
1, /* security_checks */
0, /* tls_prf_ems_check */
0, /* drgb_no_trunc_dgst */
};

static int check_non_pedantic_fips(int pedantic, const char *name)
{
if (pedantic) {
BIO_printf(bio_err, "Cannot specify -%s after -pedantic\n", name);
return 0;
}
return 1;
}

static int do_mac(EVP_MAC_CTX *ctx, unsigned char *tmp, BIO *in,
unsigned char *out, size_t *out_len)
{
Expand Down Expand Up @@ -175,10 +211,7 @@ static int write_config_header(BIO *out, const char *prov_name,
static int write_config_fips_section(BIO *out, const char *section,
unsigned char *module_mac,
size_t module_mac_len,
int conditional_errors,
int security_checks,
int ems_check,
int drgb_no_trunc_dgst,
const FIPS_OPTS *opts,
unsigned char *install_mac,
size_t install_mac_len)
{
Expand All @@ -189,13 +222,13 @@ static int write_config_fips_section(BIO *out, const char *section,
|| BIO_printf(out, "%s = %s\n", OSSL_PROV_FIPS_PARAM_INSTALL_VERSION,
VERSION_VAL) <= 0
|| BIO_printf(out, "%s = %s\n", OSSL_PROV_FIPS_PARAM_CONDITIONAL_ERRORS,
conditional_errors ? "1" : "0") <= 0
opts->conditional_errors ? "1" : "0") <= 0
|| BIO_printf(out, "%s = %s\n", OSSL_PROV_FIPS_PARAM_SECURITY_CHECKS,
security_checks ? "1" : "0") <= 0
opts->security_checks ? "1" : "0") <= 0
|| BIO_printf(out, "%s = %s\n", OSSL_PROV_FIPS_PARAM_TLS1_PRF_EMS_CHECK,
ems_check ? "1" : "0") <= 0
opts->tls_prf_ems_check ? "1" : "0") <= 0
|| BIO_printf(out, "%s = %s\n", OSSL_PROV_PARAM_DRBG_TRUNC_DIGEST,
drgb_no_trunc_dgst ? "1" : "0") <= 0
opts->drgb_no_trunc_dgst ? "1" : "0") <= 0
|| !print_mac(out, OSSL_PROV_FIPS_PARAM_MODULE_MAC, module_mac,
module_mac_len))
goto end;
Expand All @@ -216,10 +249,7 @@ static CONF *generate_config_and_load(const char *prov_name,
const char *section,
unsigned char *module_mac,
size_t module_mac_len,
int conditional_errors,
int security_checks,
int ems_check,
int drgb_no_trunc_dgst)
const FIPS_OPTS *opts)
{
BIO *mem_bio = NULL;
CONF *conf = NULL;
Expand All @@ -230,11 +260,7 @@ static CONF *generate_config_and_load(const char *prov_name,
if (!write_config_header(mem_bio, prov_name, section)
|| !write_config_fips_section(mem_bio, section,
module_mac, module_mac_len,
conditional_errors,
security_checks,
ems_check,
drgb_no_trunc_dgst,
NULL, 0))
opts, NULL, 0))
goto end;

conf = app_load_config_bio(mem_bio, NULL);
Expand Down Expand Up @@ -329,10 +355,7 @@ static int verify_config(const char *infile, const char *section,

int fipsinstall_main(int argc, char **argv)
{
int ret = 1, verify = 0, gotkey = 0, gotdigest = 0, self_test_onload = 1;
int enable_conditional_errors = 1, enable_security_checks = 1;
int enable_tls_prf_ems_check = 0; /* This is off by default */
int enable_drgb_no_trunc_dgst = 0; /* This is off by default */
int ret = 1, verify = 0, gotkey = 0, gotdigest = 0, pedantic = 0;
const char *section_name = "fips_sect";
const char *mac_name = "HMAC";
const char *prov_name = "fips";
Expand Down Expand Up @@ -372,17 +395,25 @@ int fipsinstall_main(int argc, char **argv)
case OPT_OUT:
out_fname = opt_arg();
break;
case OPT_PEDANTIC:
fips_opts = pedantic_opts;
pedantic = 1;
break;
case OPT_NO_CONDITIONAL_ERRORS:
enable_conditional_errors = 0;
if (!check_non_pedantic_fips(pedantic, "no_conditional_errors"))
goto end;
fips_opts.conditional_errors = 0;
break;
case OPT_NO_SECURITY_CHECKS:
enable_security_checks = 0;
if (!check_non_pedantic_fips(pedantic, "no_security_checks"))
goto end;
fips_opts.security_checks = 0;
break;
case OPT_TLS_PRF_EMS_CHECK:
enable_tls_prf_ems_check = 1;
fips_opts.tls_prf_ems_check = 1;
break;
case OPT_DISALLOW_DRGB_TRUNC_DIGEST:
enable_drgb_no_trunc_dgst = 1;
fips_opts.drgb_no_trunc_dgst = 1;
break;
case OPT_QUIET:
quiet = 1;
Expand Down Expand Up @@ -423,10 +454,12 @@ int fipsinstall_main(int argc, char **argv)
verify = 1;
break;
case OPT_SELF_TEST_ONLOAD:
self_test_onload = 1;
fips_opts.self_test_onload = 1;
break;
case OPT_SELF_TEST_ONINSTALL:
self_test_onload = 0;
if (!check_non_pedantic_fips(pedantic, "self_test_oninstall"))
goto end;
fips_opts.self_test_onload = 0;
break;
}
}
Expand Down Expand Up @@ -523,7 +556,7 @@ int fipsinstall_main(int argc, char **argv)
if (!do_mac(ctx, read_buffer, module_bio, module_mac, &module_mac_len))
goto end;

if (self_test_onload == 0) {
if (fips_opts.self_test_onload == 0) {
mem_bio = BIO_new_mem_buf((const void *)INSTALL_STATUS_VAL,
strlen(INSTALL_STATUS_VAL));
if (mem_bio == NULL) {
Expand All @@ -545,11 +578,7 @@ int fipsinstall_main(int argc, char **argv)
} else {

conf = generate_config_and_load(prov_name, section_name, module_mac,
module_mac_len,
enable_conditional_errors,
enable_security_checks,
enable_tls_prf_ems_check,
enable_drgb_no_trunc_dgst);
module_mac_len, &fips_opts);
if (conf == NULL)
goto end;
if (!load_fips_prov_and_run_self_test(prov_name))
Expand All @@ -563,11 +592,7 @@ int fipsinstall_main(int argc, char **argv)
goto end;
}
if (!write_config_fips_section(fout, section_name,
module_mac, module_mac_len,
enable_conditional_errors,
enable_security_checks,
enable_tls_prf_ems_check,
enable_drgb_no_trunc_dgst,
module_mac, module_mac_len, &fips_opts,
install_mac, install_mac_len))
goto end;
if (!quiet)
Expand Down

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