#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
static int cb(int ok, X509_STORE_CTX *ctx);
static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain,
STACK_OF(X509) *tchain, STACK_OF(X509_CRL) *crls);
static int vflags = 0;
static struct {
char *CAfile;
char *CApath;
char *crlfile;
char *trustfile;
char *untfile;
int verbose;
X509_VERIFY_PARAM *vpm;
} cfg;
static int
verify_opt_args(int argc, char **argv, int *argsused)
{
int oargc = argc;
int badarg = 0;
if (!args_verify(&argv, &argc, &badarg, bio_err, &cfg.vpm))
return (1);
if (badarg)
return (1);
*argsused = oargc - argc;
return (0);
}
static const struct option verify_options[] = {
{
.name = "CAfile",
.argname = "file",
.desc = "Certificate Authority file",
.type = OPTION_ARG,
.opt.arg = &cfg.CAfile,
},
{
.name = "CApath",
.argname = "path",
.desc = "Certificate Authority path",
.type = OPTION_ARG,
.opt.arg = &cfg.CApath,
},
{
.name = "CRLfile",
.argname = "file",
.desc = "Certificate Revocation List file",
.type = OPTION_ARG,
.opt.arg = &cfg.crlfile,
},
{
.name = "trusted",
.argname = "file",
.desc = "Trusted certificates file",
.type = OPTION_ARG,
.opt.arg = &cfg.trustfile,
},
{
.name = "untrusted",
.argname = "file",
.desc = "Untrusted certificates file",
.type = OPTION_ARG,
.opt.arg = &cfg.untfile,
},
{
.name = "verbose",
.desc = "Verbose",
.type = OPTION_FLAG,
.opt.flag = &cfg.verbose,
},
{
.name = NULL,
.desc = "",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = verify_opt_args,
},
{ NULL },
};
static const struct option verify_shared_options[] = {
{
.name = "attime",
.argname = "epoch",
.desc = "Use epoch as the verification time",
},
{
.name = "check_ss_sig",
.desc = "Check the root CA self-signed certificate signature",
},
{
.name = "crl_check",
.desc = "Enable CRL checking for the leaf certificate",
},
{
.name = "crl_check_all",
.desc = "Enable CRL checking for the entire certificate chain",
},
{
.name = "explicit_policy",
.desc = "Require explicit policy (per RFC 3280)",
},
{
.name = "extended_crl",
.desc = "Enable extended CRL support",
},
{
.name = "ignore_critical",
.desc = "Disable critical extension checking",
},
{
.name = "inhibit_any",
.desc = "Inhibit any policy (per RFC 3280)",
},
{
.name = "inhibit_map",
.desc = "Inhibit policy mapping (per RFC 3280)",
},
{
.name = "issuer_checks",
.desc = "Enable debugging of certificate issuer checks",
},
{
.name = "legacy_verify",
.desc = "Use legacy certificate chain verification",
},
{
.name = "policy",
.argname = "name",
.desc = "Add given policy to the acceptable set",
},
{
.name = "policy_check",
.desc = "Enable certificate policy checking",
},
{
.name = "policy_print",
.desc = "Print policy",
},
{
.name = "purpose",
.argname = "name",
.desc = "Verify for the given purpose",
},
{
.name = "use_deltas",
.desc = "Use delta CRLS (if present)",
},
{
.name = "verify_depth",
.argname = "num",
.desc = "Limit verification to the given depth",
},
{
.name = "x509_strict",
.desc = "Use strict X.509 rules (disables workarounds)",
},
{ NULL },
};
static void
verify_usage(void)
{
int i;
fprintf(stderr,
"usage: verify [-CAfile file] [-CApath directory] [-check_ss_sig]\n"
" [-CRLfile file] [-crl_check] [-crl_check_all]\n"
" [-explicit_policy] [-extended_crl]\n"
" [-ignore_critical] [-inhibit_any] [-inhibit_map]\n"
" [-issuer_checks] [-policy_check] [-purpose purpose]\n"
" [-trusted file] [-untrusted file] [-verbose]\n"
" [-x509_strict] [certificates]\n\n");
options_usage(verify_options);
fprintf(stderr, "\nVerification options:\n\n");
options_usage(verify_shared_options);
fprintf(stderr, "\nValid purposes:\n\n");
for (i = 0; i < X509_PURPOSE_get_count(); i++) {
const X509_PURPOSE *ptmp = X509_PURPOSE_get0(i);
fprintf(stderr, " %-18s%s\n", X509_PURPOSE_get0_sname(ptmp),
X509_PURPOSE_get0_name(ptmp));
}
}
int
verify_main(int argc, char **argv)
{
STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
STACK_OF(X509_CRL) *crls = NULL;
X509_STORE *cert_ctx = NULL;
X509_LOOKUP *lookup = NULL;
char **cert_files = NULL;
int argsused;
int ret = 1;
if (pledge("stdio rpath", NULL) == -1) {
perror("pledge");
exit(1);
}
memset(&cfg, 0, sizeof(cfg));
if (options_parse(argc, argv, verify_options, NULL, &argsused) != 0) {
verify_usage();
goto end;
}
if (argsused < argc)
cert_files = &argv[argsused];
cert_ctx = X509_STORE_new();
if (cert_ctx == NULL)
goto end;
X509_STORE_set_verify_cb(cert_ctx, cb);
if (cfg.vpm)
X509_STORE_set1_param(cert_ctx, cfg.vpm);
lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
if (lookup == NULL)
abort();
if (cfg.CAfile) {
if (!X509_LOOKUP_load_file(lookup, cfg.CAfile,
X509_FILETYPE_PEM)) {
BIO_printf(bio_err, "Error loading file %s\n",
cfg.CAfile);
ERR_print_errors(bio_err);
goto end;
}
} else
X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
if (lookup == NULL)
abort();
if (cfg.CApath) {
if (!X509_LOOKUP_add_dir(lookup, cfg.CApath,
X509_FILETYPE_PEM)) {
BIO_printf(bio_err, "Error loading directory %s\n",
cfg.CApath);
ERR_print_errors(bio_err);
goto end;
}
} else
X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
ERR_clear_error();
if (cfg.untfile) {
untrusted = load_certs(bio_err, cfg.untfile,
FORMAT_PEM, NULL, "untrusted certificates");
if (!untrusted)
goto end;
}
if (cfg.trustfile) {
trusted = load_certs(bio_err, cfg.trustfile,
FORMAT_PEM, NULL, "trusted certificates");
if (!trusted)
goto end;
}
if (cfg.crlfile) {
crls = load_crls(bio_err, cfg.crlfile, FORMAT_PEM,
NULL, "other CRLs");
if (!crls)
goto end;
}
ret = 0;
if (cert_files == NULL) {
if (1 != check(cert_ctx, NULL, untrusted, trusted, crls))
ret = -1;
} else {
do {
if (1 != check(cert_ctx, *cert_files++, untrusted,
trusted, crls))
ret = -1;
} while (*cert_files != NULL);
}
end:
if (cfg.vpm)
X509_VERIFY_PARAM_free(cfg.vpm);
if (cert_ctx != NULL)
X509_STORE_free(cert_ctx);
sk_X509_pop_free(untrusted, X509_free);
sk_X509_pop_free(trusted, X509_free);
sk_X509_CRL_pop_free(crls, X509_CRL_free);
return (ret < 0 ? 2 : ret);
}
static int
check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain,
STACK_OF(X509) *tchain, STACK_OF(X509_CRL) *crls)
{
X509 *x = NULL;
X509_STORE_CTX *csc = NULL;
const char *certfile = (file == NULL) ? "stdin" : file;
int verify_err;
int i = 0, ret = 0;
x = load_cert(bio_err, file, FORMAT_PEM, NULL, "certificate file");
if (x == NULL)
goto end;
if ((csc = X509_STORE_CTX_new()) == NULL)
goto end;
X509_STORE_set_flags(ctx, vflags);
if (!X509_STORE_CTX_init(csc, ctx, x, uchain))
goto end;
if (tchain)
X509_STORE_CTX_trusted_stack(csc, tchain);
if (crls)
X509_STORE_CTX_set0_crls(csc, crls);
i = X509_verify_cert(csc);
verify_err = X509_STORE_CTX_get_error(csc);
if (i > 0 && verify_err == X509_V_OK) {
fprintf(stdout, "%s: OK\n", certfile);
ret = 1;
} else {
fprintf(stdout, "%s: verification failed: %d (%s)\n", certfile,
verify_err, X509_verify_cert_error_string(verify_err));
}
end:
if (i <= 0)
ERR_print_errors(bio_err);
X509_free(x);
X509_STORE_CTX_free(csc);
return (ret);
}
static int
cb(int ok, X509_STORE_CTX *ctx)
{
int cert_error = X509_STORE_CTX_get_error(ctx);
X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx);
if (!ok) {
if (current_cert) {
X509_NAME_print_ex_fp(stdout,
X509_get_subject_name(current_cert),
0, XN_FLAG_ONELINE);
printf("\n");
}
printf("%serror %d at %d depth lookup:%s\n",
X509_STORE_CTX_get0_parent_ctx(ctx) ? "[CRL path]" : "",
cert_error,
X509_STORE_CTX_get_error_depth(ctx),
X509_verify_cert_error_string(cert_error));
switch (cert_error) {
case X509_V_ERR_NO_EXPLICIT_POLICY:
case X509_V_ERR_CERT_HAS_EXPIRED:
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
case X509_V_ERR_INVALID_CA:
case X509_V_ERR_INVALID_NON_CA:
case X509_V_ERR_PATH_LENGTH_EXCEEDED:
case X509_V_ERR_INVALID_PURPOSE:
case X509_V_ERR_CRL_HAS_EXPIRED:
case X509_V_ERR_CRL_NOT_YET_VALID:
case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION:
ok = 1;
}
return ok;
}
if (!cfg.verbose)
ERR_clear_error();
return (ok);
}
