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1.1 misho 1: /*
2: * Copyright (C) 2009 Martin Willi
3: * Copyright (C) 2015-2017 Andreas Steffen
4: * HSR Hochschule fuer Technik Rapperswil
5: *
6: * This program is free software; you can redistribute it and/or modify it
7: * under the terms of the GNU General Public License as published by the
8: * Free Software Foundation; either version 2 of the License, or (at your
9: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * for more details.
15: */
16:
17: #include <time.h>
18: #include <errno.h>
19:
20: #include "pki.h"
21:
22: #include <utils/debug.h>
23: #include <asn1/asn1.h>
24: #include <collections/linked_list.h>
25: #include <credentials/certificates/certificate.h>
26: #include <credentials/certificates/x509.h>
27: #include <credentials/certificates/ac.h>
28:
29: /**
30: * Issue an attribute certificate
31: */
32: static int acert()
33: {
34: cred_encoding_type_t form = CERT_ASN1_DER;
35: hash_algorithm_t digest = HASH_UNKNOWN;
36: signature_params_t *scheme = NULL;
37: certificate_t *ac = NULL, *cert = NULL, *issuer =NULL;
38: private_key_t *private = NULL;
39: public_key_t *public = NULL;
40: char *file = NULL, *hex = NULL, *issuercert = NULL, *issuerkey = NULL;
41: char *error = NULL, *keyid = NULL;
42: linked_list_t *groups;
43: chunk_t serial = chunk_empty, encoding = chunk_empty;
44: time_t not_before, not_after, lifetime = 24 * 60 * 60;
45: char *datenb = NULL, *datena = NULL, *dateform = NULL;
46: rng_t *rng;
47: char *arg;
48: bool pss = lib->settings->get_bool(lib->settings, "%s.rsa_pss", FALSE,
49: lib->ns);
50:
51: groups = linked_list_create();
52:
53: while (TRUE)
54: {
55: switch (command_getopt(&arg))
56: {
57: case 'h':
58: goto usage;
59: case 'g':
60: if (!enum_from_name(hash_algorithm_short_names, arg, &digest))
61: {
62: error = "invalid --digest type";
63: goto usage;
64: }
65: continue;
66: case 'R':
67: if (streq(arg, "pss"))
68: {
69: pss = TRUE;
70: }
71: else if (!streq(arg, "pkcs1"))
72: {
73: error = "invalid RSA padding";
74: goto usage;
75: }
76: continue;
77: case 'i':
78: file = arg;
79: continue;
80: case 'm':
81: groups->insert_last(groups, arg);
82: continue;
83: case 'c':
84: issuercert = arg;
85: continue;
86: case 'k':
87: issuerkey = arg;
88: continue;
89: case 'x':
90: keyid = arg;
91: continue;
92: case 'l':
93: lifetime = atoi(arg) * 60 * 60;
94: if (!lifetime)
95: {
96: error = "invalid --lifetime value";
97: goto usage;
98: }
99: continue;
100: case 'D':
101: dateform = arg;
102: continue;
103: case 'F':
104: datenb = arg;
105: continue;
106: case 'T':
107: datena = arg;
108: continue;
109: case 's':
110: hex = arg;
111: continue;
112: case 'f':
113: if (!get_form(arg, &form, CRED_CERTIFICATE))
114: {
115: error = "invalid output format";
116: goto usage;
117: }
118: continue;
119: case EOF:
120: break;
121: default:
122: error = "invalid --acert option";
123: goto usage;
124: }
125: break;
126: }
127:
128: if (!calculate_lifetime(dateform, datenb, datena, lifetime,
129: ¬_before, ¬_after))
130: {
131: error = "invalid --not-before/after datetime";
132: goto usage;
133: }
134:
135: if (!issuercert)
136: {
137: error = "--issuercert is required";
138: goto usage;
139: }
140: if (!issuerkey && !keyid)
141: {
142: error = "--issuerkey or --issuerkeyid is required";
143: goto usage;
144: }
145:
146: issuer = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
147: BUILD_FROM_FILE, issuercert, BUILD_END);
148: if (!issuer)
149: {
150: error = "parsing issuer certificate failed";
151: goto end;
152: }
153: public = issuer->get_public_key(issuer);
154: if (!public)
155: {
156: error = "extracting issuer certificate public key failed";
157: goto end;
158: }
159: if (issuerkey)
160: {
161: private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
162: public->get_type(public),
163: BUILD_FROM_FILE, issuerkey, BUILD_END);
164: }
165: else
166: {
167: chunk_t chunk;
168:
169: chunk = chunk_from_hex(chunk_create(keyid, strlen(keyid)), NULL);
170: private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY, KEY_ANY,
171: BUILD_PKCS11_KEYID, chunk, BUILD_END);
172: free(chunk.ptr);
173: }
174: if (!private)
175: {
176: error = "loading issuer private key failed";
177: goto end;
178: }
179: if (!private->belongs_to(private, public))
180: {
181: error = "issuer private key does not match issuer certificate";
182: goto end;
183: }
184:
185: if (hex)
186: {
187: serial = chunk_from_hex(chunk_create(hex, strlen(hex)), NULL);
188: }
189: else
190: {
191: rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
192: if (!rng)
193: {
194: error = "no random number generator found";
195: goto end;
196: }
197: if (!rng_allocate_bytes_not_zero(rng, 8, &serial, FALSE))
198: {
199: error = "failed to generate serial number";
200: rng->destroy(rng);
201: goto end;
202: }
203: serial.ptr[0] &= 0x7F;
204: rng->destroy(rng);
205: }
206:
207: if (file)
208: {
209: cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
210: BUILD_FROM_FILE, file, BUILD_END);
211: }
212: else
213: {
214: set_file_mode(stdin, CERT_ASN1_DER);
215: if (!chunk_from_fd(0, &encoding))
216: {
217: fprintf(stderr, "%s: ", strerror(errno));
218: error = "reading public key failed";
219: goto end;
220: }
221: cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
222: BUILD_BLOB, encoding, BUILD_END);
223: chunk_free(&encoding);
224: }
225: if (!cert)
226: {
227: error = "parsing user certificate failed";
228: goto end;
229: }
230: scheme = get_signature_scheme(private, digest, pss);
231: if (!scheme)
232: {
233: error = "no signature scheme found";
234: goto end;
235: }
236:
237: ac = lib->creds->create(lib->creds,
238: CRED_CERTIFICATE, CERT_X509_AC,
239: BUILD_CERT, cert,
240: BUILD_NOT_BEFORE_TIME, not_before,
241: BUILD_NOT_AFTER_TIME, not_after,
242: BUILD_SERIAL, serial,
243: BUILD_AC_GROUP_STRINGS, groups,
244: BUILD_SIGNING_CERT, issuer,
245: BUILD_SIGNING_KEY, private,
246: BUILD_SIGNATURE_SCHEME, scheme,
247: BUILD_END);
248: if (!ac)
249: {
250: error = "generating attribute certificate failed";
251: goto end;
252: }
253: if (!ac->get_encoding(ac, form, &encoding))
254: {
255: error = "encoding attribute certificate failed";
256: goto end;
257: }
258: set_file_mode(stdout, form);
259: if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
260: {
261: error = "writing attribute certificate key failed";
262: goto end;
263: }
264:
265: end:
266: DESTROY_IF(ac);
267: DESTROY_IF(cert);
268: DESTROY_IF(issuer);
269: DESTROY_IF(public);
270: DESTROY_IF(private);
271: groups->destroy(groups);
272: signature_params_destroy(scheme);
273: free(encoding.ptr);
274: free(serial.ptr);
275:
276: if (error)
277: {
278: fprintf(stderr, "%s\n", error);
279: return 1;
280: }
281: return 0;
282:
283: usage:
284: groups->destroy(groups);
285: return command_usage(error);
286: }
287:
288: /**
289: * Register the command.
290: */
291: static void __attribute__ ((constructor))reg()
292: {
293: command_register((command_t) {
294: acert, 'z', "acert",
295: "issue an attribute certificate",
296: {"[--in file] [--group name]* --issuerkey file|--issuerkeyid hex",
297: " --issuercert file [--serial hex] [--lifetime hours]",
298: " [--not-before datetime] [--not-after datetime] [--dateform form]",
299: "[--digest md5|sha1|sha224|sha256|sha384|sha512|sha3_224|sha3_256|sha3_384|sha3_512]",
300: "[--rsa-padding pkcs1|pss]",
301: "[--outform der|pem]"},
302: {
303: {"help", 'h', 0, "show usage information"},
304: {"in", 'i', 1, "holder certificate, default: stdin"},
305: {"group", 'm', 1, "group membership string to include"},
306: {"issuercert", 'c', 1, "issuer certificate file"},
307: {"issuerkey", 'k', 1, "issuer private key file"},
308: {"issuerkeyid", 'x', 1, "smartcard or TPM issuer private key object handle"},
309: {"serial", 's', 1, "serial number in hex, default: random"},
310: {"lifetime", 'l', 1, "hours the acert is valid, default: 24"},
311: {"not-before", 'F', 1, "date/time the validity of the AC starts"},
312: {"not-after", 'T', 1, "date/time the validity of the AC ends"},
313: {"dateform", 'D', 1, "strptime(3) input format, default: %d.%m.%y %T"},
314: {"digest", 'g', 1, "digest for signature creation, default: key-specific"},
315: {"rsa-padding", 'R', 1, "padding for RSA signatures, default: pkcs1"},
316: {"outform", 'f', 1, "encoding of generated cert, default: der"},
317: }
318: });
319: }