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1 /*
2  * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9 
10 #include <openssl/opensslconf.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include "apps.h"
15 #include "progs.h"
16 #include <openssl/bio.h>
17 #include <openssl/err.h>
18 #include <openssl/pem.h>
19 #include <openssl/rand.h>
20 #include <openssl/ts.h>
21 #include <openssl/bn.h>
22 
23 /* Request nonce length, in bits (must be a multiple of 8). */
24 #define NONCE_LENGTH            64
25 
26 /* Name of config entry that defines the OID file. */
27 #define ENV_OID_FILE            "oid_file"
28 
29 /* Is |EXACTLY_ONE| of three pointers set? */
30 #define EXACTLY_ONE(a, b, c) \
31         (( a && !b && !c) || \
32          ( b && !a && !c) || \
33          ( c && !a && !b))
34 
35 static ASN1_OBJECT *txt2obj(const char *oid);
36 static CONF *load_config_file(const char *configfile);
37 
38 /* Query related functions. */
39 static int query_command(const char *data, const char *digest,
40                          const EVP_MD *md, const char *policy, int no_nonce,
41                          int cert, const char *in, const char *out, int text);
42 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
43                             const char *policy, int no_nonce, int cert);
44 static int create_digest(BIO *input, const char *digest,
45                          const EVP_MD *md, unsigned char **md_value);
46 static ASN1_INTEGER *create_nonce(int bits);
47 
48 /* Reply related functions. */
49 static int reply_command(CONF *conf, const char *section, const char *engine,
50                          const char *queryfile, const char *passin, const char *inkey,
51                          const EVP_MD *md, const char *signer, const char *chain,
52                          const char *policy, const char *in, int token_in,
53                          const char *out, int token_out, int text);
54 static TS_RESP *read_PKCS7(BIO *in_bio);
55 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
56                                 const char *queryfile, const char *passin,
57                                 const char *inkey, const EVP_MD *md, const char *signer,
58                                 const char *chain, const char *policy);
59 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data);
60 static ASN1_INTEGER *next_serial(const char *serialfile);
61 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial);
62 
63 /* Verify related functions. */
64 static int verify_command(const char *data, const char *digest, const char *queryfile,
65                           const char *in, int token_in,
66                           const char *CApath, const char *CAfile, const char *untrusted,
67                           X509_VERIFY_PARAM *vpm);
68 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
69                                         const char *queryfile,
70                                         const char *CApath, const char *CAfile,
71                                         const char *untrusted,
72                                         X509_VERIFY_PARAM *vpm);
73 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
74                                      X509_VERIFY_PARAM *vpm);
75 static int verify_cb(int ok, X509_STORE_CTX *ctx);
76 
77 typedef enum OPTION_choice {
78     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
79     OPT_ENGINE, OPT_CONFIG, OPT_SECTION, OPT_QUERY, OPT_DATA,
80     OPT_DIGEST, OPT_TSPOLICY, OPT_NO_NONCE, OPT_CERT,
81     OPT_IN, OPT_TOKEN_IN, OPT_OUT, OPT_TOKEN_OUT, OPT_TEXT,
82     OPT_REPLY, OPT_QUERYFILE, OPT_PASSIN, OPT_INKEY, OPT_SIGNER,
83     OPT_CHAIN, OPT_VERIFY, OPT_CAPATH, OPT_CAFILE, OPT_UNTRUSTED,
84     OPT_MD, OPT_V_ENUM, OPT_R_ENUM
85 } OPTION_CHOICE;
86 
87 const OPTIONS ts_options[] = {
88     {"help", OPT_HELP, '-', "Display this summary"},
89     {"config", OPT_CONFIG, '<', "Configuration file"},
90     {"section", OPT_SECTION, 's', "Section to use within config file"},
91     {"query", OPT_QUERY, '-', "Generate a TS query"},
92     {"data", OPT_DATA, '<', "File to hash"},
93     {"digest", OPT_DIGEST, 's', "Digest (as a hex string)"},
94     OPT_R_OPTIONS,
95     {"tspolicy", OPT_TSPOLICY, 's', "Policy OID to use"},
96     {"no_nonce", OPT_NO_NONCE, '-', "Do not include a nonce"},
97     {"cert", OPT_CERT, '-', "Put cert request into query"},
98     {"in", OPT_IN, '<', "Input file"},
99     {"token_in", OPT_TOKEN_IN, '-', "Input is a PKCS#7 file"},
100     {"out", OPT_OUT, '>', "Output file"},
101     {"token_out", OPT_TOKEN_OUT, '-', "Output is a PKCS#7 file"},
102     {"text", OPT_TEXT, '-', "Output text (not DER)"},
103     {"reply", OPT_REPLY, '-', "Generate a TS reply"},
104     {"queryfile", OPT_QUERYFILE, '<', "File containing a TS query"},
105     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
106     {"inkey", OPT_INKEY, 's', "File with private key for reply"},
107     {"signer", OPT_SIGNER, 's', "Signer certificate file"},
108     {"chain", OPT_CHAIN, '<', "File with signer CA chain"},
109     {"verify", OPT_VERIFY, '-', "Verify a TS response"},
110     {"CApath", OPT_CAPATH, '/', "Path to trusted CA files"},
111     {"CAfile", OPT_CAFILE, '<', "File with trusted CA certs"},
112     {"untrusted", OPT_UNTRUSTED, '<', "File with untrusted certs"},
113     {"", OPT_MD, '-', "Any supported digest"},
114 #ifndef OPENSSL_NO_ENGINE
115     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
116 #endif
117     {OPT_HELP_STR, 1, '-', "\nOptions specific to 'ts -verify': \n"},
118     OPT_V_OPTIONS,
119     {OPT_HELP_STR, 1, '-', "\n"},
120     {NULL}
121 };
122 
123 /*
124  * This command is so complex, special help is needed.
125  */
126 static char* opt_helplist[] = {
127     "Typical uses:",
128     "ts -query [-rand file...] [-config file] [-data file]",
129     "          [-digest hexstring] [-tspolicy oid] [-no_nonce] [-cert]",
130     "          [-in file] [-out file] [-text]",
131     "  or",
132     "ts -reply [-config file] [-section tsa_section]",
133     "          [-queryfile file] [-passin password]",
134     "          [-signer tsa_cert.pem] [-inkey private_key.pem]",
135     "          [-chain certs_file.pem] [-tspolicy oid]",
136     "          [-in file] [-token_in] [-out file] [-token_out]",
137 #ifndef OPENSSL_NO_ENGINE
138     "          [-text] [-engine id]",
139 #else
140     "          [-text]",
141 #endif
142     "  or",
143     "ts -verify -CApath dir -CAfile file.pem -untrusted file.pem",
144     "           [-data file] [-digest hexstring]",
145     "           [-queryfile file] -in file [-token_in]",
146     "           [[options specific to 'ts -verify']]",
147     NULL,
148 };
149 
ts_main(int argc,char ** argv)150 int ts_main(int argc, char **argv)
151 {
152     CONF *conf = NULL;
153     const char *CAfile = NULL, *untrusted = NULL, *prog;
154     const char *configfile = default_config_file, *engine = NULL;
155     const char *section = NULL;
156     char **helpp;
157     char *password = NULL;
158     char *data = NULL, *digest = NULL, *policy = NULL;
159     char *in = NULL, *out = NULL, *queryfile = NULL, *passin = NULL;
160     char *inkey = NULL, *signer = NULL, *chain = NULL, *CApath = NULL;
161     const EVP_MD *md = NULL;
162     OPTION_CHOICE o, mode = OPT_ERR;
163     int ret = 1, no_nonce = 0, cert = 0, text = 0;
164     int vpmtouched = 0;
165     X509_VERIFY_PARAM *vpm = NULL;
166     /* Input is ContentInfo instead of TimeStampResp. */
167     int token_in = 0;
168     /* Output is ContentInfo instead of TimeStampResp. */
169     int token_out = 0;
170 
171     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
172         goto end;
173 
174     prog = opt_init(argc, argv, ts_options);
175     while ((o = opt_next()) != OPT_EOF) {
176         switch (o) {
177         case OPT_EOF:
178         case OPT_ERR:
179  opthelp:
180             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
181             goto end;
182         case OPT_HELP:
183             opt_help(ts_options);
184             for (helpp = opt_helplist; *helpp; ++helpp)
185                 BIO_printf(bio_err, "%s\n", *helpp);
186             ret = 0;
187             goto end;
188         case OPT_CONFIG:
189             configfile = opt_arg();
190             break;
191         case OPT_SECTION:
192             section = opt_arg();
193             break;
194         case OPT_QUERY:
195         case OPT_REPLY:
196         case OPT_VERIFY:
197             if (mode != OPT_ERR)
198                 goto opthelp;
199             mode = o;
200             break;
201         case OPT_DATA:
202             data = opt_arg();
203             break;
204         case OPT_DIGEST:
205             digest = opt_arg();
206             break;
207         case OPT_R_CASES:
208             if (!opt_rand(o))
209                 goto end;
210             break;
211         case OPT_TSPOLICY:
212             policy = opt_arg();
213             break;
214         case OPT_NO_NONCE:
215             no_nonce = 1;
216             break;
217         case OPT_CERT:
218             cert = 1;
219             break;
220         case OPT_IN:
221             in = opt_arg();
222             break;
223         case OPT_TOKEN_IN:
224             token_in = 1;
225             break;
226         case OPT_OUT:
227             out = opt_arg();
228             break;
229         case OPT_TOKEN_OUT:
230             token_out = 1;
231             break;
232         case OPT_TEXT:
233             text = 1;
234             break;
235         case OPT_QUERYFILE:
236             queryfile = opt_arg();
237             break;
238         case OPT_PASSIN:
239             passin = opt_arg();
240             break;
241         case OPT_INKEY:
242             inkey = opt_arg();
243             break;
244         case OPT_SIGNER:
245             signer = opt_arg();
246             break;
247         case OPT_CHAIN:
248             chain = opt_arg();
249             break;
250         case OPT_CAPATH:
251             CApath = opt_arg();
252             break;
253         case OPT_CAFILE:
254             CAfile = opt_arg();
255             break;
256         case OPT_UNTRUSTED:
257             untrusted = opt_arg();
258             break;
259         case OPT_ENGINE:
260             engine = opt_arg();
261             break;
262         case OPT_MD:
263             if (!opt_md(opt_unknown(), &md))
264                 goto opthelp;
265             break;
266         case OPT_V_CASES:
267             if (!opt_verify(o, vpm))
268                 goto end;
269             vpmtouched++;
270             break;
271         }
272     }
273     if (mode == OPT_ERR || opt_num_rest() != 0)
274         goto opthelp;
275 
276     if (mode == OPT_REPLY && passin &&
277         !app_passwd(passin, NULL, &password, NULL)) {
278         BIO_printf(bio_err, "Error getting password.\n");
279         goto end;
280     }
281 
282     if ((conf = load_config_file(configfile)) == NULL)
283         goto end;
284     if (configfile != default_config_file && !app_load_modules(conf))
285         goto end;
286 
287     /* Check parameter consistency and execute the appropriate function. */
288     if (mode == OPT_QUERY) {
289         if (vpmtouched)
290             goto opthelp;
291         if ((data != NULL) && (digest != NULL))
292             goto opthelp;
293         ret = !query_command(data, digest, md, policy, no_nonce, cert,
294                              in, out, text);
295     } else if (mode == OPT_REPLY) {
296         if (vpmtouched)
297             goto opthelp;
298         if ((in != NULL) && (queryfile != NULL))
299             goto opthelp;
300         if (in == NULL) {
301             if ((conf == NULL) || (token_in != 0))
302                 goto opthelp;
303         }
304         ret = !reply_command(conf, section, engine, queryfile,
305                              password, inkey, md, signer, chain, policy,
306                              in, token_in, out, token_out, text);
307 
308     } else if (mode == OPT_VERIFY) {
309         if ((in == NULL) || !EXACTLY_ONE(queryfile, data, digest))
310             goto opthelp;
311         ret = !verify_command(data, digest, queryfile, in, token_in,
312                               CApath, CAfile, untrusted,
313                               vpmtouched ? vpm : NULL);
314     } else {
315         goto opthelp;
316     }
317 
318  end:
319     X509_VERIFY_PARAM_free(vpm);
320     NCONF_free(conf);
321     OPENSSL_free(password);
322     return ret;
323 }
324 
325 /*
326  * Configuration file-related function definitions.
327  */
328 
txt2obj(const char * oid)329 static ASN1_OBJECT *txt2obj(const char *oid)
330 {
331     ASN1_OBJECT *oid_obj = NULL;
332 
333     if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
334         BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
335 
336     return oid_obj;
337 }
338 
load_config_file(const char * configfile)339 static CONF *load_config_file(const char *configfile)
340 {
341     CONF *conf = app_load_config(configfile);
342 
343     if (conf != NULL) {
344         const char *p;
345 
346         BIO_printf(bio_err, "Using configuration from %s\n", configfile);
347         p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
348         if (p != NULL) {
349             BIO *oid_bio = BIO_new_file(p, "r");
350             if (!oid_bio)
351                 ERR_print_errors(bio_err);
352             else {
353                 OBJ_create_objects(oid_bio);
354                 BIO_free_all(oid_bio);
355             }
356         } else
357             ERR_clear_error();
358         if (!add_oid_section(conf))
359             ERR_print_errors(bio_err);
360     }
361     return conf;
362 }
363 
364 /*
365  * Query-related method definitions.
366  */
query_command(const char * data,const char * digest,const EVP_MD * md,const char * policy,int no_nonce,int cert,const char * in,const char * out,int text)367 static int query_command(const char *data, const char *digest, const EVP_MD *md,
368                          const char *policy, int no_nonce,
369                          int cert, const char *in, const char *out, int text)
370 {
371     int ret = 0;
372     TS_REQ *query = NULL;
373     BIO *in_bio = NULL;
374     BIO *data_bio = NULL;
375     BIO *out_bio = NULL;
376 
377     /* Build query object. */
378     if (in != NULL) {
379         if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
380             goto end;
381         query = d2i_TS_REQ_bio(in_bio, NULL);
382     } else {
383         if (digest == NULL
384             && (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
385             goto end;
386         query = create_query(data_bio, digest, md, policy, no_nonce, cert);
387     }
388     if (query == NULL)
389         goto end;
390 
391     if (text) {
392         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
393             goto end;
394         if (!TS_REQ_print_bio(out_bio, query))
395             goto end;
396     } else {
397         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
398             goto end;
399         if (!i2d_TS_REQ_bio(out_bio, query))
400             goto end;
401     }
402 
403     ret = 1;
404 
405  end:
406     ERR_print_errors(bio_err);
407     BIO_free_all(in_bio);
408     BIO_free_all(data_bio);
409     BIO_free_all(out_bio);
410     TS_REQ_free(query);
411     return ret;
412 }
413 
create_query(BIO * data_bio,const char * digest,const EVP_MD * md,const char * policy,int no_nonce,int cert)414 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
415                             const char *policy, int no_nonce, int cert)
416 {
417     int ret = 0;
418     TS_REQ *ts_req = NULL;
419     int len;
420     TS_MSG_IMPRINT *msg_imprint = NULL;
421     X509_ALGOR *algo = NULL;
422     unsigned char *data = NULL;
423     ASN1_OBJECT *policy_obj = NULL;
424     ASN1_INTEGER *nonce_asn1 = NULL;
425 
426     if (md == NULL && (md = EVP_get_digestbyname("sha1")) == NULL)
427         goto err;
428     if ((ts_req = TS_REQ_new()) == NULL)
429         goto err;
430     if (!TS_REQ_set_version(ts_req, 1))
431         goto err;
432     if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
433         goto err;
434     if ((algo = X509_ALGOR_new()) == NULL)
435         goto err;
436     if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
437         goto err;
438     if ((algo->parameter = ASN1_TYPE_new()) == NULL)
439         goto err;
440     algo->parameter->type = V_ASN1_NULL;
441     if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
442         goto err;
443     if ((len = create_digest(data_bio, digest, md, &data)) == 0)
444         goto err;
445     if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
446         goto err;
447     if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
448         goto err;
449     if (policy && (policy_obj = txt2obj(policy)) == NULL)
450         goto err;
451     if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
452         goto err;
453 
454     /* Setting nonce if requested. */
455     if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
456         goto err;
457     if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
458         goto err;
459     if (!TS_REQ_set_cert_req(ts_req, cert))
460         goto err;
461 
462     ret = 1;
463  err:
464     if (!ret) {
465         TS_REQ_free(ts_req);
466         ts_req = NULL;
467         BIO_printf(bio_err, "could not create query\n");
468         ERR_print_errors(bio_err);
469     }
470     TS_MSG_IMPRINT_free(msg_imprint);
471     X509_ALGOR_free(algo);
472     OPENSSL_free(data);
473     ASN1_OBJECT_free(policy_obj);
474     ASN1_INTEGER_free(nonce_asn1);
475     return ts_req;
476 }
477 
create_digest(BIO * input,const char * digest,const EVP_MD * md,unsigned char ** md_value)478 static int create_digest(BIO *input, const char *digest, const EVP_MD *md,
479                          unsigned char **md_value)
480 {
481     int md_value_len;
482     int rv = 0;
483     EVP_MD_CTX *md_ctx = NULL;
484 
485     md_value_len = EVP_MD_size(md);
486     if (md_value_len < 0)
487         return 0;
488 
489     if (input != NULL) {
490         unsigned char buffer[4096];
491         int length;
492 
493         md_ctx = EVP_MD_CTX_new();
494         if (md_ctx == NULL)
495             return 0;
496         *md_value = app_malloc(md_value_len, "digest buffer");
497         if (!EVP_DigestInit(md_ctx, md))
498             goto err;
499         while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
500             if (!EVP_DigestUpdate(md_ctx, buffer, length))
501                 goto err;
502         }
503         if (!EVP_DigestFinal(md_ctx, *md_value, NULL))
504             goto err;
505         md_value_len = EVP_MD_size(md);
506     } else {
507         long digest_len;
508         *md_value = OPENSSL_hexstr2buf(digest, &digest_len);
509         if (!*md_value || md_value_len != digest_len) {
510             OPENSSL_free(*md_value);
511             *md_value = NULL;
512             BIO_printf(bio_err, "bad digest, %d bytes "
513                        "must be specified\n", md_value_len);
514             return 0;
515         }
516     }
517     rv = md_value_len;
518  err:
519     EVP_MD_CTX_free(md_ctx);
520     return rv;
521 }
522 
create_nonce(int bits)523 static ASN1_INTEGER *create_nonce(int bits)
524 {
525     unsigned char buf[20];
526     ASN1_INTEGER *nonce = NULL;
527     int len = (bits - 1) / 8 + 1;
528     int i;
529 
530     if (len > (int)sizeof(buf))
531         goto err;
532     if (RAND_bytes(buf, len) <= 0)
533         goto err;
534 
535     /* Find the first non-zero byte and creating ASN1_INTEGER object. */
536     for (i = 0; i < len && !buf[i]; ++i)
537         continue;
538     if ((nonce = ASN1_INTEGER_new()) == NULL)
539         goto err;
540     OPENSSL_free(nonce->data);
541     nonce->length = len - i;
542     nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
543     memcpy(nonce->data, buf + i, nonce->length);
544     return nonce;
545 
546  err:
547     BIO_printf(bio_err, "could not create nonce\n");
548     ASN1_INTEGER_free(nonce);
549     return NULL;
550 }
551 
552 /*
553  * Reply-related method definitions.
554  */
555 
reply_command(CONF * conf,const char * section,const char * engine,const char * queryfile,const char * passin,const char * inkey,const EVP_MD * md,const char * signer,const char * chain,const char * policy,const char * in,int token_in,const char * out,int token_out,int text)556 static int reply_command(CONF *conf, const char *section, const char *engine,
557                          const char *queryfile, const char *passin, const char *inkey,
558                          const EVP_MD *md, const char *signer, const char *chain,
559                          const char *policy, const char *in, int token_in,
560                          const char *out, int token_out, int text)
561 {
562     int ret = 0;
563     TS_RESP *response = NULL;
564     BIO *in_bio = NULL;
565     BIO *query_bio = NULL;
566     BIO *inkey_bio = NULL;
567     BIO *signer_bio = NULL;
568     BIO *out_bio = NULL;
569 
570     if (in != NULL) {
571         if ((in_bio = BIO_new_file(in, "rb")) == NULL)
572             goto end;
573         if (token_in) {
574             response = read_PKCS7(in_bio);
575         } else {
576             response = d2i_TS_RESP_bio(in_bio, NULL);
577         }
578     } else {
579         response = create_response(conf, section, engine, queryfile,
580                                    passin, inkey, md, signer, chain, policy);
581         if (response != NULL)
582             BIO_printf(bio_err, "Response has been generated.\n");
583         else
584             BIO_printf(bio_err, "Response is not generated.\n");
585     }
586     if (response == NULL)
587         goto end;
588 
589     /* Write response. */
590     if (text) {
591         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
592         goto end;
593         if (token_out) {
594             TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
595             if (!TS_TST_INFO_print_bio(out_bio, tst_info))
596                 goto end;
597         } else {
598             if (!TS_RESP_print_bio(out_bio, response))
599                 goto end;
600         }
601     } else {
602         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
603             goto end;
604         if (token_out) {
605             PKCS7 *token = TS_RESP_get_token(response);
606             if (!i2d_PKCS7_bio(out_bio, token))
607                 goto end;
608         } else {
609             if (!i2d_TS_RESP_bio(out_bio, response))
610                 goto end;
611         }
612     }
613 
614     ret = 1;
615 
616  end:
617     ERR_print_errors(bio_err);
618     BIO_free_all(in_bio);
619     BIO_free_all(query_bio);
620     BIO_free_all(inkey_bio);
621     BIO_free_all(signer_bio);
622     BIO_free_all(out_bio);
623     TS_RESP_free(response);
624     return ret;
625 }
626 
627 /* Reads a PKCS7 token and adds default 'granted' status info to it. */
read_PKCS7(BIO * in_bio)628 static TS_RESP *read_PKCS7(BIO *in_bio)
629 {
630     int ret = 0;
631     PKCS7 *token = NULL;
632     TS_TST_INFO *tst_info = NULL;
633     TS_RESP *resp = NULL;
634     TS_STATUS_INFO *si = NULL;
635 
636     if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
637         goto end;
638     if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
639         goto end;
640     if ((resp = TS_RESP_new()) == NULL)
641         goto end;
642     if ((si = TS_STATUS_INFO_new()) == NULL)
643         goto end;
644     if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
645         goto end;
646     if (!TS_RESP_set_status_info(resp, si))
647         goto end;
648     TS_RESP_set_tst_info(resp, token, tst_info);
649     token = NULL;               /* Ownership is lost. */
650     tst_info = NULL;            /* Ownership is lost. */
651     ret = 1;
652 
653  end:
654     PKCS7_free(token);
655     TS_TST_INFO_free(tst_info);
656     if (!ret) {
657         TS_RESP_free(resp);
658         resp = NULL;
659     }
660     TS_STATUS_INFO_free(si);
661     return resp;
662 }
663 
create_response(CONF * conf,const char * section,const char * engine,const char * queryfile,const char * passin,const char * inkey,const EVP_MD * md,const char * signer,const char * chain,const char * policy)664 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
665                                 const char *queryfile, const char *passin,
666                                 const char *inkey, const EVP_MD *md, const char *signer,
667                                 const char *chain, const char *policy)
668 {
669     int ret = 0;
670     TS_RESP *response = NULL;
671     BIO *query_bio = NULL;
672     TS_RESP_CTX *resp_ctx = NULL;
673 
674     if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
675         goto end;
676     if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
677         goto end;
678     if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
679         goto end;
680     if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
681         goto end;
682 #ifndef OPENSSL_NO_ENGINE
683     if (!TS_CONF_set_crypto_device(conf, section, engine))
684         goto end;
685 #endif
686     if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
687         goto end;
688     if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
689         goto end;
690     if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
691         goto end;
692 
693     if (md) {
694         if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
695             goto end;
696     } else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
697             goto end;
698     }
699 
700     if (!TS_CONF_set_ess_cert_id_digest(conf, section, resp_ctx))
701         goto end;
702     if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
703         goto end;
704     if (!TS_CONF_set_policies(conf, section, resp_ctx))
705         goto end;
706     if (!TS_CONF_set_digests(conf, section, resp_ctx))
707         goto end;
708     if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
709         goto end;
710     if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
711         goto end;
712     if (!TS_CONF_set_ordering(conf, section, resp_ctx))
713         goto end;
714     if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
715         goto end;
716     if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
717         goto end;
718     if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
719         goto end;
720     ret = 1;
721 
722  end:
723     if (!ret) {
724         TS_RESP_free(response);
725         response = NULL;
726     }
727     TS_RESP_CTX_free(resp_ctx);
728     BIO_free_all(query_bio);
729     return response;
730 }
731 
serial_cb(TS_RESP_CTX * ctx,void * data)732 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
733 {
734     const char *serial_file = (const char *)data;
735     ASN1_INTEGER *serial = next_serial(serial_file);
736 
737     if (serial == NULL) {
738         TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
739                                     "Error during serial number "
740                                     "generation.");
741         TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
742     } else {
743         save_ts_serial(serial_file, serial);
744     }
745 
746     return serial;
747 }
748 
next_serial(const char * serialfile)749 static ASN1_INTEGER *next_serial(const char *serialfile)
750 {
751     int ret = 0;
752     BIO *in = NULL;
753     ASN1_INTEGER *serial = NULL;
754     BIGNUM *bn = NULL;
755 
756     if ((serial = ASN1_INTEGER_new()) == NULL)
757         goto err;
758 
759     if ((in = BIO_new_file(serialfile, "r")) == NULL) {
760         ERR_clear_error();
761         BIO_printf(bio_err, "Warning: could not open file %s for "
762                    "reading, using serial number: 1\n", serialfile);
763         if (!ASN1_INTEGER_set(serial, 1))
764             goto err;
765     } else {
766         char buf[1024];
767         if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
768             BIO_printf(bio_err, "unable to load number from %s\n",
769                        serialfile);
770             goto err;
771         }
772         if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
773             goto err;
774         ASN1_INTEGER_free(serial);
775         serial = NULL;
776         if (!BN_add_word(bn, 1))
777             goto err;
778         if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
779             goto err;
780     }
781     ret = 1;
782 
783  err:
784     if (!ret) {
785         ASN1_INTEGER_free(serial);
786         serial = NULL;
787     }
788     BIO_free_all(in);
789     BN_free(bn);
790     return serial;
791 }
792 
save_ts_serial(const char * serialfile,ASN1_INTEGER * serial)793 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
794 {
795     int ret = 0;
796     BIO *out = NULL;
797 
798     if ((out = BIO_new_file(serialfile, "w")) == NULL)
799         goto err;
800     if (i2a_ASN1_INTEGER(out, serial) <= 0)
801         goto err;
802     if (BIO_puts(out, "\n") <= 0)
803         goto err;
804     ret = 1;
805  err:
806     if (!ret)
807         BIO_printf(bio_err, "could not save serial number to %s\n",
808                    serialfile);
809     BIO_free_all(out);
810     return ret;
811 }
812 
813 
814 /*
815  * Verify-related method definitions.
816  */
817 
verify_command(const char * data,const char * digest,const char * queryfile,const char * in,int token_in,const char * CApath,const char * CAfile,const char * untrusted,X509_VERIFY_PARAM * vpm)818 static int verify_command(const char *data, const char *digest, const char *queryfile,
819                           const char *in, int token_in,
820                           const char *CApath, const char *CAfile, const char *untrusted,
821                           X509_VERIFY_PARAM *vpm)
822 {
823     BIO *in_bio = NULL;
824     PKCS7 *token = NULL;
825     TS_RESP *response = NULL;
826     TS_VERIFY_CTX *verify_ctx = NULL;
827     int ret = 0;
828 
829     if ((in_bio = BIO_new_file(in, "rb")) == NULL)
830         goto end;
831     if (token_in) {
832         if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
833             goto end;
834     } else {
835         if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
836             goto end;
837     }
838 
839     if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
840                                         CApath, CAfile, untrusted,
841                                         vpm)) == NULL)
842         goto end;
843 
844     ret = token_in
845         ? TS_RESP_verify_token(verify_ctx, token)
846         : TS_RESP_verify_response(verify_ctx, response);
847 
848  end:
849     printf("Verification: ");
850     if (ret)
851         printf("OK\n");
852     else {
853         printf("FAILED\n");
854         ERR_print_errors(bio_err);
855     }
856 
857     BIO_free_all(in_bio);
858     PKCS7_free(token);
859     TS_RESP_free(response);
860     TS_VERIFY_CTX_free(verify_ctx);
861     return ret;
862 }
863 
create_verify_ctx(const char * data,const char * digest,const char * queryfile,const char * CApath,const char * CAfile,const char * untrusted,X509_VERIFY_PARAM * vpm)864 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
865                                         const char *queryfile,
866                                         const char *CApath, const char *CAfile,
867                                         const char *untrusted,
868                                         X509_VERIFY_PARAM *vpm)
869 {
870     TS_VERIFY_CTX *ctx = NULL;
871     BIO *input = NULL;
872     TS_REQ *request = NULL;
873     int ret = 0;
874     int f = 0;
875 
876     if (data != NULL || digest != NULL) {
877         if ((ctx = TS_VERIFY_CTX_new()) == NULL)
878             goto err;
879         f = TS_VFY_VERSION | TS_VFY_SIGNER;
880         if (data != NULL) {
881             BIO *out = NULL;
882 
883             f |= TS_VFY_DATA;
884             if ((out = BIO_new_file(data, "rb")) == NULL)
885                 goto err;
886             if (TS_VERIFY_CTX_set_data(ctx, out) == NULL) {
887                 BIO_free_all(out);
888                 goto err;
889             }
890         } else if (digest != NULL) {
891             long imprint_len;
892             unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
893             f |= TS_VFY_IMPRINT;
894             if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
895                 BIO_printf(bio_err, "invalid digest string\n");
896                 goto err;
897             }
898         }
899 
900     } else if (queryfile != NULL) {
901         if ((input = BIO_new_file(queryfile, "rb")) == NULL)
902             goto err;
903         if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
904             goto err;
905         if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
906             goto err;
907     } else {
908         return NULL;
909     }
910 
911     /* Add the signature verification flag and arguments. */
912     TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
913 
914     /* Initialising the X509_STORE object. */
915     if (TS_VERIFY_CTX_set_store(ctx, create_cert_store(CApath, CAfile, vpm))
916             == NULL)
917         goto err;
918 
919     /* Loading untrusted certificates. */
920     if (untrusted
921         && TS_VERIFY_CTS_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
922         goto err;
923     ret = 1;
924 
925  err:
926     if (!ret) {
927         TS_VERIFY_CTX_free(ctx);
928         ctx = NULL;
929     }
930     BIO_free_all(input);
931     TS_REQ_free(request);
932     return ctx;
933 }
934 
create_cert_store(const char * CApath,const char * CAfile,X509_VERIFY_PARAM * vpm)935 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
936                                      X509_VERIFY_PARAM *vpm)
937 {
938     X509_STORE *cert_ctx = NULL;
939     X509_LOOKUP *lookup = NULL;
940     int i;
941 
942     cert_ctx = X509_STORE_new();
943     X509_STORE_set_verify_cb(cert_ctx, verify_cb);
944     if (CApath != NULL) {
945         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
946         if (lookup == NULL) {
947             BIO_printf(bio_err, "memory allocation failure\n");
948             goto err;
949         }
950         i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
951         if (!i) {
952             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
953             goto err;
954         }
955     }
956 
957     if (CAfile != NULL) {
958         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
959         if (lookup == NULL) {
960             BIO_printf(bio_err, "memory allocation failure\n");
961             goto err;
962         }
963         i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
964         if (!i) {
965             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
966             goto err;
967         }
968     }
969 
970     if (vpm != NULL)
971         X509_STORE_set1_param(cert_ctx, vpm);
972 
973     return cert_ctx;
974 
975  err:
976     X509_STORE_free(cert_ctx);
977     return NULL;
978 }
979 
verify_cb(int ok,X509_STORE_CTX * ctx)980 static int verify_cb(int ok, X509_STORE_CTX *ctx)
981 {
982     return ok;
983 }
984