| /* | |
| * Copyright 1995-2026 The OpenSSL Project Authors. All Rights Reserved. | |
| * | |
| * Licensed under the Apache License 2.0 (the "License"). You may not use | |
| * this file except in compliance with the License. You can obtain a copy | |
| * in the file LICENSE in the source distribution or at | |
| * https://www.openssl.org/source/license.html | |
| */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include "apps.h" | |
| #include "progs.h" | |
| #include <openssl/bio.h> | |
| #include <openssl/err.h> | |
| #include <openssl/x509.h> | |
| #include <openssl/x509v3.h> | |
| #include <openssl/pem.h> | |
| static int cb(int ok, X509_STORE_CTX *ctx); | |
| static int check(X509_STORE *ctx, const char *file, | |
| STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, | |
| STACK_OF(X509_CRL) *crls, int show_chain, | |
| STACK_OF(OPENSSL_STRING) *opts); | |
| static int v_verbose = 0, vflags = 0; | |
| typedef enum OPTION_choice { | |
| OPT_COMMON, | |
| OPT_CAPATH, | |
| OPT_CAFILE, | |
| OPT_CASTORE, | |
| OPT_NOCAPATH, | |
| OPT_NOCAFILE, | |
| OPT_NOCASTORE, | |
| OPT_UNTRUSTED, | |
| OPT_TRUSTED, | |
| OPT_CRLFILE, | |
| OPT_CRL_DOWNLOAD, | |
| OPT_SHOW_CHAIN, | |
| OPT_V_ENUM, | |
| OPT_NAMEOPT, | |
| OPT_VFYOPT, | |
| OPT_VERBOSE, | |
| OPT_PROV_ENUM | |
| } OPTION_CHOICE; | |
| const OPTIONS verify_options[] = { | |
| { OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert...]\n" }, | |
| OPT_SECTION("General"), | |
| { "help", OPT_HELP, '-', "Display this summary" }, | |
| { "verbose", OPT_VERBOSE, '-', | |
| "Print extra information about the operations being performed." }, | |
| { "nameopt", OPT_NAMEOPT, 's', "Certificate subject/issuer name printing options" }, | |
| OPT_SECTION("Certificate chain"), | |
| { "trusted", OPT_TRUSTED, '<', "A file of trusted certificates" }, | |
| { "CAfile", OPT_CAFILE, '<', "File in PEM format with trusted CA certs" }, | |
| { "CApath", OPT_CAPATH, '/', "Dir with trusted CA cert files in PEM format" }, | |
| { "CAstore", OPT_CASTORE, ':', "URI of store with trusted CA certs" }, | |
| { "no-CAfile", OPT_NOCAFILE, '-', | |
| "Do not load the default trusted certificates file" }, | |
| { "no-CApath", OPT_NOCAPATH, '-', | |
| "Do not load trusted certificates from the default directory" }, | |
| { "no-CAstore", OPT_NOCASTORE, '-', | |
| "Do not load trusted certificates from the default certificates store" }, | |
| { "untrusted", OPT_UNTRUSTED, '<', "A file of untrusted certificates" }, | |
| { "CRLfile", OPT_CRLFILE, '<', | |
| "File containing one or more CRL's (in PEM format) to load" }, | |
| { "crl_download", OPT_CRL_DOWNLOAD, '-', | |
| "Try downloading CRL information for certificates via their CDP entries" }, | |
| { "show_chain", OPT_SHOW_CHAIN, '-', | |
| "Display information about the certificate chain" }, | |
| OPT_V_OPTIONS, | |
| { "vfyopt", OPT_VFYOPT, 's', "Verification parameter in n:v form" }, | |
| OPT_PROV_OPTIONS, | |
| OPT_PARAMETERS(), | |
| { "cert", 0, 0, "Certificate(s) to verify (optional; stdin used otherwise)" }, | |
| { NULL } | |
| }; | |
| int verify_main(int argc, char **argv) | |
| { | |
| STACK_OF(X509) *untrusted = NULL, *trusted = NULL; | |
| STACK_OF(X509_CRL) *crls = NULL; | |
| STACK_OF(OPENSSL_STRING) *vfyopts = NULL; | |
| X509_STORE *store = NULL; | |
| X509_VERIFY_PARAM *vpm = NULL; | |
| const char *prog, *CApath = NULL, *CAfile = NULL, *CAstore = NULL; | |
| int noCApath = 0, noCAfile = 0, noCAstore = 0; | |
| int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1; | |
| OPTION_CHOICE o; | |
| if ((vpm = X509_VERIFY_PARAM_new()) == NULL) | |
| goto end; | |
| prog = opt_init(argc, argv, verify_options); | |
| while ((o = opt_next()) != OPT_EOF) { | |
| switch (o) { | |
| case OPT_EOF: | |
| case OPT_ERR: | |
| opthelp: | |
| BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); | |
| goto end; | |
| case OPT_HELP: | |
| opt_help(verify_options); | |
| BIO_puts(bio_err, "\nRecognized certificate chain purposes:\n"); | |
| for (i = 0; i < X509_PURPOSE_get_count(); i++) { | |
| X509_PURPOSE *ptmp = X509_PURPOSE_get0(i); | |
| BIO_printf(bio_err, " %-15s %s\n", | |
| X509_PURPOSE_get0_sname(ptmp), | |
| X509_PURPOSE_get0_name(ptmp)); | |
| } | |
| BIO_puts(bio_err, "Recognized certificate policy names:\n"); | |
| for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) { | |
| const X509_VERIFY_PARAM *vptmp = X509_VERIFY_PARAM_get0(i); | |
| BIO_printf(bio_err, " %s\n", | |
| X509_VERIFY_PARAM_get0_name(vptmp)); | |
| } | |
| ret = 0; | |
| goto end; | |
| case OPT_V_CASES: | |
| if (!opt_verify(o, vpm)) | |
| goto end; | |
| vpmtouched++; | |
| break; | |
| case OPT_CAPATH: | |
| CApath = opt_arg(); | |
| break; | |
| case OPT_CAFILE: | |
| CAfile = opt_arg(); | |
| break; | |
| case OPT_CASTORE: | |
| CAstore = opt_arg(); | |
| break; | |
| case OPT_NOCAPATH: | |
| noCApath = 1; | |
| break; | |
| case OPT_NOCAFILE: | |
| noCAfile = 1; | |
| break; | |
| case OPT_NOCASTORE: | |
| noCAstore = 1; | |
| break; | |
| case OPT_UNTRUSTED: | |
| /* Zero or more times */ | |
| if (!load_certs(opt_arg(), 0, &untrusted, NULL, | |
| "untrusted certificates")) | |
| goto end; | |
| break; | |
| case OPT_TRUSTED: | |
| /* Zero or more times */ | |
| noCAfile = 1; | |
| noCApath = 1; | |
| noCAstore = 1; | |
| if (!load_certs(opt_arg(), 0, &trusted, NULL, "trusted certificates")) | |
| goto end; | |
| break; | |
| case OPT_CRLFILE: | |
| /* Zero or more times */ | |
| if (!load_crls(opt_arg(), &crls, NULL, "other CRLs")) | |
| goto end; | |
| break; | |
| case OPT_CRL_DOWNLOAD: | |
| crl_download = 1; | |
| break; | |
| case OPT_SHOW_CHAIN: | |
| show_chain = 1; | |
| break; | |
| case OPT_NAMEOPT: | |
| if (!set_nameopt(opt_arg())) | |
| goto end; | |
| break; | |
| case OPT_VFYOPT: | |
| if (!vfyopts) | |
| vfyopts = sk_OPENSSL_STRING_new_null(); | |
| if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, opt_arg())) | |
| goto opthelp; | |
| break; | |
| case OPT_VERBOSE: | |
| v_verbose = 1; | |
| break; | |
| case OPT_PROV_CASES: | |
| if (!opt_provider(o)) | |
| goto end; | |
| break; | |
| } | |
| } | |
| /* Extra arguments are certificates to verify. */ | |
| argc = opt_num_rest(); | |
| argv = opt_rest(); | |
| if (trusted != NULL | |
| && (CAfile != NULL || CApath != NULL || CAstore != NULL)) { | |
| BIO_printf(bio_err, | |
| "%s: Cannot use -trusted with -CAfile, -CApath or -CAstore\n", | |
| prog); | |
| goto end; | |
| } | |
| if ((store = setup_verify(CAfile, noCAfile, CApath, noCApath, | |
| CAstore, noCAstore)) | |
| == NULL) | |
| goto end; | |
| X509_STORE_set_verify_cb(store, cb); | |
| if (vpmtouched) | |
| X509_STORE_set1_param(store, vpm); | |
| ERR_clear_error(); | |
| if (crl_download) | |
| store_setup_crl_download(store); | |
| ret = 0; | |
| if (argc < 1) { | |
| if (check(store, NULL, untrusted, trusted, crls, show_chain, | |
| vfyopts) | |
| != 1) | |
| ret = -1; | |
| } else { | |
| for (i = 0; i < argc; i++) | |
| if (check(store, argv[i], untrusted, trusted, crls, show_chain, | |
| vfyopts) | |
| != 1) | |
| ret = -1; | |
| } | |
| end: | |
| X509_VERIFY_PARAM_free(vpm); | |
| X509_STORE_free(store); | |
| OSSL_STACK_OF_X509_free(untrusted); | |
| OSSL_STACK_OF_X509_free(trusted); | |
| sk_X509_CRL_pop_free(crls, X509_CRL_free); | |
| sk_OPENSSL_STRING_free(vfyopts); | |
| return (ret < 0 ? 2 : ret); | |
| } | |
| static int check(X509_STORE *ctx, const char *file, | |
| STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, | |
| STACK_OF(X509_CRL) *crls, int show_chain, | |
| STACK_OF(OPENSSL_STRING) *opts) | |
| { | |
| X509 *x = NULL; | |
| int i = 0, ret = 0; | |
| X509_STORE_CTX *csc; | |
| STACK_OF(X509) *chain = NULL; | |
| int num_untrusted; | |
| x = load_cert(file, FORMAT_UNDEF, "certificate file"); | |
| if (x == NULL) | |
| goto end; | |
| if (opts != NULL) { | |
| for (i = 0; i < sk_OPENSSL_STRING_num(opts); i++) { | |
| char *opt = sk_OPENSSL_STRING_value(opts, i); | |
| if (x509_ctrl_string(x, opt) <= 0) { | |
| BIO_printf(bio_err, "parameter error \"%s\"\n", opt); | |
| ERR_print_errors(bio_err); | |
| X509_free(x); | |
| return 0; | |
| } | |
| } | |
| } | |
| csc = X509_STORE_CTX_new(); | |
| if (csc == NULL) { | |
| BIO_printf(bio_err, "error %s: X.509 store context allocation failed\n", | |
| (file == NULL) ? "stdin" : file); | |
| goto end; | |
| } | |
| X509_STORE_set_flags(ctx, vflags); | |
| if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) { | |
| X509_STORE_CTX_free(csc); | |
| BIO_printf(bio_err, | |
| "error %s: X.509 store context initialization failed\n", | |
| (file == NULL) ? "stdin" : file); | |
| goto end; | |
| } | |
| if (tchain != NULL) | |
| X509_STORE_CTX_set0_trusted_stack(csc, tchain); | |
| if (crls != NULL) | |
| X509_STORE_CTX_set0_crls(csc, crls); | |
| i = X509_verify_cert(csc); | |
| if (i > 0 && X509_STORE_CTX_get_error(csc) == X509_V_OK) { | |
| BIO_printf(bio_out, "%s: OK\n", (file == NULL) ? "stdin" : file); | |
| ret = 1; | |
| if (show_chain) { | |
| int j; | |
| chain = X509_STORE_CTX_get1_chain(csc); | |
| num_untrusted = X509_STORE_CTX_get_num_untrusted(csc); | |
| BIO_puts(bio_out, "Chain:\n"); | |
| for (j = 0; j < sk_X509_num(chain); j++) { | |
| X509 *cert = sk_X509_value(chain, j); | |
| BIO_printf(bio_out, "depth=%d: ", j); | |
| X509_NAME_print_ex_fp(stdout, | |
| X509_get_subject_name(cert), | |
| 0, get_nameopt()); | |
| if (j < num_untrusted) | |
| BIO_puts(bio_out, " (untrusted)"); | |
| BIO_puts(bio_out, "\n"); | |
| } | |
| OSSL_STACK_OF_X509_free(chain); | |
| } | |
| } else { | |
| BIO_printf(bio_err, | |
| "error %s: verification failed\n", | |
| (file == NULL) ? "stdin" : file); | |
| } | |
| X509_STORE_CTX_free(csc); | |
| end: | |
| if (i <= 0) | |
| ERR_print_errors(bio_err); | |
| X509_free(x); | |
| return ret; | |
| } | |
| static int cb(int ok, X509_STORE_CTX *ctx) | |
| { | |
| int cert_error = X509_STORE_CTX_get_error(ctx); | |
| const X509 *current_cert = X509_STORE_CTX_get_current_cert(ctx); | |
| if (!ok) { | |
| if (current_cert != NULL) { | |
| X509_NAME_print_ex(bio_err, | |
| X509_get_subject_name(current_cert), | |
| 0, get_nameopt()); | |
| BIO_puts(bio_err, "\n"); | |
| } | |
| BIO_printf(bio_err, "%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)); | |
| /* | |
| * Pretend that some errors are ok, so they don't stop further | |
| * processing of the certificate chain. Setting ok = 1 does this. | |
| * After X509_verify_cert() is done, we verify that there were | |
| * no actual errors, even if the returned value was positive. | |
| */ | |
| switch (cert_error) { | |
| case X509_V_ERR_NO_EXPLICIT_POLICY: | |
| policies_print(ctx); | |
| /* fall through */ | |
| case X509_V_ERR_CERT_HAS_EXPIRED: | |
| /* Continue even if the leaf is a self-signed cert */ | |
| case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: | |
| /* Continue after extension errors too */ | |
| case X509_V_ERR_INVALID_CA: | |
| case X509_V_ERR_INVALID_NON_CA: | |
| case X509_V_ERR_PATH_LENGTH_EXCEEDED: | |
| case X509_V_ERR_CRL_HAS_EXPIRED: | |
| case X509_V_ERR_CRL_NOT_YET_VALID: | |
| case X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION: | |
| /* errors due to strict conformance checking (-x509_strict) */ | |
| case X509_V_ERR_INVALID_PURPOSE: | |
| case X509_V_ERR_PATHLEN_INVALID_FOR_NON_CA: | |
| case X509_V_ERR_PATHLEN_WITHOUT_KU_KEY_CERT_SIGN: | |
| case X509_V_ERR_CA_BCONS_NOT_CRITICAL: | |
| case X509_V_ERR_CA_CERT_MISSING_KEY_USAGE: | |
| case X509_V_ERR_KU_KEY_CERT_SIGN_INVALID_FOR_NON_CA: | |
| case X509_V_ERR_ISSUER_NAME_EMPTY: | |
| case X509_V_ERR_SUBJECT_NAME_EMPTY: | |
| case X509_V_ERR_EMPTY_SUBJECT_SAN_NOT_CRITICAL: | |
| case X509_V_ERR_EMPTY_SUBJECT_ALT_NAME: | |
| case X509_V_ERR_SIGNATURE_ALGORITHM_INCONSISTENCY: | |
| case X509_V_ERR_AUTHORITY_KEY_IDENTIFIER_CRITICAL: | |
| case X509_V_ERR_SUBJECT_KEY_IDENTIFIER_CRITICAL: | |
| case X509_V_ERR_MISSING_AUTHORITY_KEY_IDENTIFIER: | |
| case X509_V_ERR_MISSING_SUBJECT_KEY_IDENTIFIER: | |
| case X509_V_ERR_EXTENSIONS_REQUIRE_VERSION_3: | |
| ok = 1; | |
| } | |
| return ok; | |
| } | |
| if (cert_error == X509_V_OK && ok == 2) | |
| policies_print(ctx); | |
| if (!v_verbose) | |
| ERR_clear_error(); | |
| return ok; | |
| } |