/* * Copyright 1995-2020 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 #include #include #include "apps.h" #include "progs.h" #include #include #include #include #include DEFINE_STACK_OF(X509) DEFINE_STACK_OF(X509_CRL) DEFINE_STACK_OF_STRING() 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_ERR = -1, OPT_EOF = 0, OPT_HELP, OPT_ENGINE, 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"}, #ifndef OPENSSL_NO_ENGINE {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, #endif {"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, '<', "A file of trusted certificates"}, {"CApath", OPT_CAPATH, '/', "A directory of files with trusted certificates"}, {"CAstore", OPT_CASTORE, ':', "URI to a store of trusted certificates"}, {"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) { ENGINE *e = NULL; 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_printf(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_printf(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(), &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(), &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_ENGINE: if ((e = setup_engine(opt_arg(), 0)) == NULL) { /* Failure message already displayed */ goto end; } 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; } } 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); sk_X509_pop_free(untrusted, X509_free); sk_X509_pop_free(trusted, X509_free); sk_X509_CRL_pop_free(crls, X509_CRL_free); sk_OPENSSL_STRING_free(vfyopts); release_engine(e); 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); 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_printf(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_printf(bio_out, " (untrusted)"); BIO_printf(bio_out, "\n"); } sk_X509_pop_free(chain, X509_free); } } 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); 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_printf(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 thru */ 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_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 (cert_error == X509_V_OK && ok == 2) policies_print(ctx); if (!v_verbose) ERR_clear_error(); return ok; }