Silence Clang warning about unit'd variable
[openssl.git] / apps / verify.c
index 47e602d..0235194 100644 (file)
@@ -1,25 +1,24 @@
-/* apps/verify.c */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
  * This package is an SSL implementation written
  * by Eric Young (eay@cryptsoft.com).
  * The implementation was written so as to conform with Netscapes SSL.
- * 
+ *
  * This library is free for commercial and non-commercial use as long as
  * the following conditions are aheared to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
+ *
  * Copyright remains Eric Young's, and as such any Copyright notices in
  * the code are not to be removed.
  * If this package is used in a product, Eric Young should be given attribution
  * as the author of the parts of the library used.
  * This can be in the form of a textual message at program startup or
  * in documentation (online or textual) provided with the package.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *     Eric Young (eay@cryptsoft.com)"
  *    The word 'cryptographic' can be left out if the rouines from the library
  *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
+ * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +48,7 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- * 
+ *
  * The licence and distribution terms for any publically available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
 #include <openssl/x509v3.h>
 #include <openssl/pem.h>
 
-#undef PROG
-#define PROG   verify_main
-
-static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
-static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose);
-static STACK_OF(X509) *load_untrusted(char *file);
-static int v_verbose=0, issuer_checks = 0;
+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, ENGINE *e, int show_chain);
+static int v_verbose = 0, vflags = 0;
 
-int MAIN(int, char **);
+typedef enum OPTION_choice {
+    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
+    OPT_ENGINE, OPT_CAPATH, OPT_CAFILE, OPT_UNTRUSTED, OPT_TRUSTED,
+    OPT_CRLFILE, OPT_CRL_DOWNLOAD, OPT_SHOW_CHAIN,
+    OPT_V_ENUM,
+    OPT_VERBOSE
+} OPTION_CHOICE;
 
-int MAIN(int argc, char **argv)
-       {
-       int i,ret=1;
-       int purpose = -1;
-       char *CApath=NULL,*CAfile=NULL;
-       char *untfile = NULL, *trustfile = NULL;
-       STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
-       X509_STORE *cert_ctx=NULL;
-       X509_LOOKUP *lookup=NULL;
+OPTIONS verify_options[] = {
+    {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"},
+    {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
+    {"help", OPT_HELP, '-', "Display this summary"},
+    {"verbose", OPT_VERBOSE, '-'},
+    {"CApath", OPT_CAPATH, '/'},
+    {"CAfile", OPT_CAFILE, '<'},
+    {"untrusted", OPT_UNTRUSTED, '<'},
+    {"trusted", OPT_TRUSTED, '<'},
+    {"CRLfile", OPT_CRLFILE, '<'},
+    {"crl_download", OPT_CRL_DOWNLOAD, '-'},
+    {"show_chain", OPT_SHOW_CHAIN, '-'},
+#ifndef OPENSSL_NO_ENGINE
+    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
+#endif
+    OPT_V_OPTIONS,
+    {NULL}
+};
 
-       cert_ctx=X509_STORE_new();
-       if (cert_ctx == NULL) goto end;
-       X509_STORE_set_verify_cb_func(cert_ctx,cb);
+int verify_main(int argc, char **argv)
+{
+    ENGINE *e = NULL;
+    STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
+    STACK_OF(X509_CRL) *crls = NULL;
+    X509_STORE *store = NULL;
+    X509_VERIFY_PARAM *vpm = NULL;
+    char *prog, *CApath = NULL, *CAfile = NULL;
+    char *untfile = NULL, *trustfile = NULL, *crlfile = NULL;
+    int vpmtouched = 0, crl_download = 0, show_chain = 0, i = 0, ret = 1;
+    OPTION_CHOICE o;
 
-       ERR_load_crypto_strings();
+    if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
+        goto end;
 
-       apps_startup();
+    prog = opt_init(argc, argv, verify_options);
+    while ((o = opt_next()) != OPT_EOF) {
+        switch (o) {
+        case OPT_EOF:
+        case OPT_ERR:
+            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
+            goto end;
+        case OPT_HELP:
+            opt_help(verify_options);
+            BIO_printf(bio_err, "Recognized usages:\n");
+            for (i = 0; i < X509_PURPOSE_get_count(); i++) {
+                X509_PURPOSE *ptmp;
+                ptmp = X509_PURPOSE_get0(i);
+                BIO_printf(bio_err, "\t%-10s\t%s\n",
+                        X509_PURPOSE_get0_sname(ptmp),
+                        X509_PURPOSE_get0_name(ptmp));
+            }
 
-       if (bio_err == NULL)
-               if ((bio_err=BIO_new(BIO_s_file())) != NULL)
-                       BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
+            BIO_printf(bio_err, "Recognized verify names:\n");
+            for (i = 0; i < X509_VERIFY_PARAM_get_count(); i++) {
+                const X509_VERIFY_PARAM *vptmp;
+                vptmp = X509_VERIFY_PARAM_get0(i);
+                BIO_printf(bio_err, "\t%-10s\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_UNTRUSTED:
+            untfile = opt_arg();
+            break;
+        case OPT_TRUSTED:
+            trustfile = opt_arg();
+            break;
+        case OPT_CRLFILE:
+            crlfile = opt_arg();
+            break;
+        case OPT_CRL_DOWNLOAD:
+            crl_download = 1;
+            break;
+        case OPT_SHOW_CHAIN:
+            show_chain = 1;
+            break;
+        case OPT_ENGINE:
+            e = setup_engine(opt_arg(), 0);
+            break;
+        case OPT_VERBOSE:
+            v_verbose = 1;
+            break;
+        }
+    }
+    argc = opt_num_rest();
+    argv = opt_rest();
 
-       argc--;
-       argv++;
-       for (;;)
-               {
-               if (argc >= 1)
-                       {
-                       if (strcmp(*argv,"-CApath") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               CApath= *(++argv);
-                               }
-                       else if (strcmp(*argv,"-CAfile") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               CAfile= *(++argv);
-                               }
-                       else if (strcmp(*argv,"-purpose") == 0)
-                               {
-                               X509_PURPOSE *xptmp;
-                               if (argc-- < 1) goto end;
-                               i = X509_PURPOSE_get_by_sname(*(++argv));
-                               if(i < 0)
-                                       {
-                                       BIO_printf(bio_err, "unrecognized purpose\n");
-                                       goto end;
-                                       }
-                               xptmp = X509_PURPOSE_get0(i);
-                               purpose = X509_PURPOSE_get_id(xptmp);
-                               }
-                       else if (strcmp(*argv,"-untrusted") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               untfile= *(++argv);
-                               }
-                       else if (strcmp(*argv,"-trusted") == 0)
-                               {
-                               if (argc-- < 1) goto end;
-                               trustfile= *(++argv);
-                               }
-                       else if (strcmp(*argv,"-help") == 0)
-                               goto end;
-                       else if (strcmp(*argv,"-issuer_checks") == 0)
-                               issuer_checks=1;
-                       else if (strcmp(*argv,"-verbose") == 0)
-                               v_verbose=1;
-                       else if (argv[0][0] == '-')
-                               goto end;
-                       else
-                               break;
-                       argc--;
-                       argv++;
-                       }
-               else
-                       break;
-               }
+    if (!app_load_modules(NULL))
+        goto end;
 
-       lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
-       if (lookup == NULL) abort();
-       if (CAfile) {
-               i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
-               if(!i) {
-                       BIO_printf(bio_err, "Error loading file %s\n", 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 (CApath) {
-               i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
-               if(!i) {
-                       BIO_printf(bio_err, "Error loading directory %s\n", CApath);
-                       ERR_print_errors(bio_err);
-                       goto end;
-               }
-       } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
+    if ((store = setup_verify(CAfile, CApath)) == NULL)
+        goto end;
+    X509_STORE_set_verify_cb(store, cb);
 
-       ERR_clear_error();
+    if (vpmtouched)
+        X509_STORE_set1_param(store, vpm);
 
-       if(untfile) {
-               if(!(untrusted = load_untrusted(untfile))) {
-                       BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
-                       ERR_print_errors(bio_err);
-                       goto end;
-               }
-       }
+    ERR_clear_error();
 
-       if(trustfile) {
-               if(!(trusted = load_untrusted(trustfile))) {
-                       BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);
-                       ERR_print_errors(bio_err);
-                       goto end;
-               }
-       }
+    if (untfile) {
+        untrusted = load_certs(untfile, FORMAT_PEM,
+                               NULL, e, "untrusted certificates");
+        if (!untrusted)
+            goto end;
+    }
 
-       if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose);
-       else
-               for (i=0; i<argc; i++)
-                       check(cert_ctx,argv[i], untrusted, trusted, purpose);
-       ret=0;
-end:
-       if (ret == 1) {
-               BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] cert1 cert2 ...\n");
-               BIO_printf(bio_err,"recognized usages:\n");
-               for(i = 0; i < X509_PURPOSE_get_count(); i++) {
-                       X509_PURPOSE *ptmp;
-                       ptmp = X509_PURPOSE_get0(i);
-                       BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
-                                                               X509_PURPOSE_get0_name(ptmp));
-               }
-       }
-       if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
-       sk_X509_pop_free(untrusted, X509_free);
-       sk_X509_pop_free(trusted, X509_free);
-       EXIT(ret);
-       }
+    if (trustfile) {
+        trusted = load_certs(trustfile, FORMAT_PEM,
+                             NULL, e, "trusted certificates");
+        if (!trusted)
+            goto end;
+    }
 
-static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose)
-       {
-       X509 *x=NULL;
-       BIO *in=NULL;
-       int i=0,ret=0;
-       X509_STORE_CTX *csc;
+    if (crlfile) {
+        crls = load_crls(crlfile, FORMAT_PEM, NULL, e, "other CRLs");
+        if (!crls)
+            goto end;
+    }
 
-       in=BIO_new(BIO_s_file());
-       if (in == NULL)
-               {
-               ERR_print_errors(bio_err);
-               goto end;
-               }
+    if (crl_download)
+        store_setup_crl_download(store);
 
-       if (file == NULL)
-               BIO_set_fp(in,stdin,BIO_NOCLOSE);
-       else
-               {
-               if (BIO_read_filename(in,file) <= 0)
-                       {
-                       perror(file);
-                       goto end;
-                       }
-               }
+    ret = 0;
+    if (argc < 1) {
+        if (check(store, NULL, untrusted, trusted, crls, e, show_chain) != 1)
+            ret = -1;
+    } else {
+        for (i = 0; i < argc; i++)
+            if (check(store, argv[i], untrusted, trusted, crls, e,
+                      show_chain) != 1)
+                ret = -1;
+    }
 
-       x=PEM_read_bio_X509(in,NULL,NULL,NULL);
-       if (x == NULL)
-               {
-               fprintf(stdout,"%s: unable to load certificate file\n",
-                       (file == NULL)?"stdin":file);
-               ERR_print_errors(bio_err);
-               goto end;
-               }
-       fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);
+ 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);
+    return (ret < 0 ? 2 : ret);
+}
 
-       csc = X509_STORE_CTX_new();
-       if (csc == NULL)
-               {
-               ERR_print_errors(bio_err);
-               goto end;
-               }
-       X509_STORE_CTX_init(csc,ctx,x,uchain);
-       if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
-       if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
-       if(issuer_checks)
-               X509_STORE_CTX_set_flags(csc, X509_V_FLAG_CB_ISSUER_CHECK);
-       i=X509_verify_cert(csc);
-       X509_STORE_CTX_free(csc);
+static int check(X509_STORE *ctx, char *file,
+                 STACK_OF(X509) *uchain, STACK_OF(X509) *tchain,
+                 STACK_OF(X509_CRL) *crls, ENGINE *e, int show_chain)
+{
+    X509 *x = NULL;
+    int i = 0, ret = 0;
+    X509_STORE_CTX *csc;
+    STACK_OF(X509) *chain = NULL;
 
-       ret=0;
-end:
-       if (i)
-               {
-               fprintf(stdout,"OK\n");
-               ret=1;
-               }
-       else
-               ERR_print_errors(bio_err);
-       if (x != NULL) X509_free(x);
-       if (in != NULL) BIO_free(in);
+    x = load_cert(file, FORMAT_PEM, NULL, e, "certificate file");
+    if (x == NULL)
+        goto end;
+    printf("%s: ", (file == NULL) ? "stdin" : file);
 
-       return(ret);
-       }
+    csc = X509_STORE_CTX_new();
+    if (csc == NULL) {
+        ERR_print_errors(bio_err);
+        goto end;
+    }
+    X509_STORE_set_flags(ctx, vflags);
+    if (!X509_STORE_CTX_init(csc, ctx, x, uchain)) {
+        ERR_print_errors(bio_err);
+        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);
+    if (i > 0 && show_chain)
+        chain = X509_STORE_CTX_get1_chain(csc);
+    X509_STORE_CTX_free(csc);
 
-static STACK_OF(X509) *load_untrusted(char *certfile)
-{
-       STACK_OF(X509_INFO) *sk=NULL;
-       STACK_OF(X509) *stack=NULL, *ret=NULL;
-       BIO *in=NULL;
-       X509_INFO *xi;
+    ret = 0;
+ end:
+    if (i > 0) {
+        printf("OK\n");
+        ret = 1;
+    } else
+        ERR_print_errors(bio_err);
+    if (chain) {
+        printf("Chain:\n");
+        for (i = 0; i < sk_X509_num(chain); i++) {
+            X509 *cert = sk_X509_value(chain, i);
+            printf("depth=%d: ", i);
+            X509_NAME_print_ex_fp(stdout,
+                                  X509_get_subject_name(cert),
+                                  0, XN_FLAG_ONELINE);
+            printf("\n");
+        }
+        sk_X509_pop_free(chain, X509_free);
+    }
+    X509_free(x);
 
-       if(!(stack = sk_X509_new_null())) {
-               BIO_printf(bio_err,"memory allocation failure\n");
-               goto end;
-       }
+    return (ret);
+}
 
-       if(!(in=BIO_new_file(certfile, "r"))) {
-               BIO_printf(bio_err,"error opening the file, %s\n",certfile);
-               goto end;
-       }
-
-       /* This loads from a file, a stack of x509/crl/pkey sets */
-       if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
-               BIO_printf(bio_err,"error reading the file, %s\n",certfile);
-               goto end;
-       }
+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);
 
-       /* scan over it and pull out the certs */
-       while (sk_X509_INFO_num(sk))
-               {
-               xi=sk_X509_INFO_shift(sk);
-               if (xi->x509 != NULL)
-                       {
-                       sk_X509_push(stack,xi->x509);
-                       xi->x509=NULL;
-                       }
-               X509_INFO_free(xi);
-               }
-       if(!sk_X509_num(stack)) {
-               BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
-               sk_X509_free(stack);
-               goto end;
-       }
-       ret=stack;
-end:
-       BIO_free(in);
-       sk_X509_INFO_free(sk);
-       return(ret);
-       }
+    if (!ok) {
+        if (current_cert) {
+            X509_NAME_print_ex(bio_err,
+                            X509_get_subject_name(current_cert),
+                            0, XN_FLAG_ONELINE);
+            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));
+        switch (cert_error) {
+        case X509_V_ERR_NO_EXPLICIT_POLICY:
+            policies_print(ctx);
+        case X509_V_ERR_CERT_HAS_EXPIRED:
 
-static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
-       {
-       char buf[256];
+            /*
+             * since we are just checking the certificates, it is ok if they
+             * are self signed. But we should still warn the user.
+             */
+        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;
+        }
 
-       if (!ok)
-               {
-               X509_NAME_oneline(
-                               X509_get_subject_name(ctx->current_cert),buf,256);
-               printf("%s\n",buf);
-               printf("error %d at %d depth lookup:%s\n",ctx->error,
-                       ctx->error_depth,
-                       X509_verify_cert_error_string(ctx->error));
-               if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
-               /* since we are just checking the certificates, it is
-                * ok if they are self signed. But we should still warn
-                * the user.
-                */
-               if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
-               /* Continue after extension errors too */
-               if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
-               if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
-               if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
-               if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
-               }
-       if (!v_verbose)
-               ERR_clear_error();
-       return(ok);
-       }
+        return ok;
 
+    }
+    if (cert_error == X509_V_OK && ok == 2)
+        policies_print(ctx);
+    if (!v_verbose)
+        ERR_clear_error();
+    return (ok);
+}