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7960dbec | 1 | /* |
33388b44 | 2 | * Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved. |
7960dbec DDO |
3 | * Copyright Nokia 2007-2019 |
4 | * Copyright Siemens AG 2015-2019 | |
5 | * | |
6 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
7 | * this file except in compliance with the License. You can obtain a copy | |
8 | * in the file LICENSE in the source distribution or at | |
9 | * https://www.openssl.org/source/license.html | |
10 | */ | |
11 | ||
12 | #include <string.h> | |
13 | #include <openssl/cmp_util.h> | |
706457b7 | 14 | #include "cmp_local.h" /* just for decls of internal functions defined here */ |
7960dbec DDO |
15 | #include <openssl/cmperr.h> |
16 | #include <openssl/err.h> /* should be implied by cmperr.h */ | |
17 | #include <openssl/x509v3.h> | |
18 | ||
19 | /* | |
20 | * use trace API for CMP-specific logging, prefixed by "CMP " and severity | |
21 | */ | |
22 | ||
23 | int OSSL_CMP_log_open(void) /* is designed to be idempotent */ | |
24 | { | |
25 | #ifndef OPENSSL_NO_STDIO | |
26 | BIO *bio = BIO_new_fp(stdout, BIO_NOCLOSE); | |
27 | ||
28 | if (bio != NULL && OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, bio)) | |
29 | return 1; | |
30 | BIO_free(bio); | |
31 | #endif | |
32 | CMPerr(0, CMP_R_NO_STDIO); | |
33 | return 0; | |
34 | } | |
35 | ||
36 | void OSSL_CMP_log_close(void) /* is designed to be idempotent */ | |
37 | { | |
38 | (void)OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, NULL); | |
39 | } | |
40 | ||
41 | /* return >= 0 if level contains logging level, possibly preceded by "CMP " */ | |
42 | #define max_level_len 5 /* = max length of the below strings, e.g., "EMERG" */ | |
43 | static OSSL_CMP_severity parse_level(const char *level) | |
44 | { | |
45 | const char *end_level = strchr(level, ':'); | |
46 | int len; | |
47 | char level_copy[max_level_len + 1]; | |
48 | ||
49 | if (end_level == NULL) | |
50 | return -1; | |
51 | ||
52 | if (strncmp(level, OSSL_CMP_LOG_PREFIX, | |
53 | strlen(OSSL_CMP_LOG_PREFIX)) == 0) | |
54 | level += strlen(OSSL_CMP_LOG_PREFIX); | |
55 | len = end_level - level; | |
56 | if (len > max_level_len) | |
57 | return -1; | |
58 | OPENSSL_strlcpy(level_copy, level, len + 1); | |
59 | return | |
60 | strcmp(level_copy, "EMERG") == 0 ? OSSL_CMP_LOG_EMERG : | |
61 | strcmp(level_copy, "ALERT") == 0 ? OSSL_CMP_LOG_ALERT : | |
62 | strcmp(level_copy, "CRIT") == 0 ? OSSL_CMP_LOG_CRIT : | |
63 | strcmp(level_copy, "ERROR") == 0 ? OSSL_CMP_LOG_ERR : | |
64 | strcmp(level_copy, "WARN") == 0 ? OSSL_CMP_LOG_WARNING : | |
65 | strcmp(level_copy, "NOTE") == 0 ? OSSL_CMP_LOG_NOTICE : | |
66 | strcmp(level_copy, "INFO") == 0 ? OSSL_CMP_LOG_INFO : | |
67 | strcmp(level_copy, "DEBUG") == 0 ? OSSL_CMP_LOG_DEBUG : | |
68 | -1; | |
69 | } | |
70 | ||
71 | const char *ossl_cmp_log_parse_metadata(const char *buf, | |
ebf30069 DDO |
72 | OSSL_CMP_severity *level, |
73 | char **func, char **file, int *line) | |
7960dbec DDO |
74 | { |
75 | const char *p_func = buf; | |
76 | const char *p_file = buf == NULL ? NULL : strchr(buf, ':'); | |
77 | const char *p_level = buf; | |
78 | const char *msg = buf; | |
79 | ||
80 | *level = -1; | |
81 | *func = NULL; | |
82 | *file = NULL; | |
83 | *line = 0; | |
84 | ||
85 | if (p_file != NULL) { | |
86 | const char *p_line = strchr(++p_file, ':'); | |
87 | ||
88 | if ((*level = parse_level(buf)) < 0 && p_line != NULL) { | |
89 | /* check if buf contains location info and logging level */ | |
90 | char *p_level_tmp = (char *)p_level; | |
91 | const long line_number = strtol(++p_line, &p_level_tmp, 10); | |
92 | ||
93 | p_level = p_level_tmp; | |
94 | if (p_level > p_line && *(p_level++) == ':') { | |
95 | if ((*level = parse_level(p_level)) >= 0) { | |
96 | *func = OPENSSL_strndup(p_func, p_file - 1 - p_func); | |
97 | *file = OPENSSL_strndup(p_file, p_line - 1 - p_file); | |
98 | /* no real problem if OPENSSL_strndup() returns NULL */ | |
99 | *line = (int)line_number; | |
100 | msg = strchr(p_level, ':') + 1; | |
101 | if (*msg == ' ') | |
102 | msg++; | |
103 | } | |
104 | } | |
105 | } | |
106 | } | |
107 | return msg; | |
108 | } | |
109 | ||
ebf30069 DDO |
110 | #define UNKNOWN_FUNC "(unknown function)" /* the default for OPENSSL_FUNC */ |
111 | /* | |
112 | * substitute fallback if component/function name is NULL or empty or contains | |
113 | * just pseudo-information "(unknown function)" due to -pedantic and macros.h | |
114 | */ | |
115 | static const char *improve_location_name(const char *func, const char *fallback) | |
116 | { | |
555ed968 MC |
117 | if (fallback == NULL) |
118 | return func == NULL ? UNKNOWN_FUNC : func; | |
119 | ||
ebf30069 DDO |
120 | return func == NULL || *func == '\0' || strcmp(func, UNKNOWN_FUNC) == 0 |
121 | ? fallback : func; | |
122 | } | |
123 | ||
235595c4 | 124 | int OSSL_CMP_print_to_bio(BIO *bio, const char *component, const char *file, |
ebf30069 DDO |
125 | int line, OSSL_CMP_severity level, const char *msg) |
126 | { | |
127 | const char *level_string = | |
128 | level == OSSL_CMP_LOG_EMERG ? "EMERG" : | |
129 | level == OSSL_CMP_LOG_ALERT ? "ALERT" : | |
130 | level == OSSL_CMP_LOG_CRIT ? "CRIT" : | |
131 | level == OSSL_CMP_LOG_ERR ? "error" : | |
132 | level == OSSL_CMP_LOG_WARNING ? "warning" : | |
133 | level == OSSL_CMP_LOG_NOTICE ? "NOTE" : | |
134 | level == OSSL_CMP_LOG_INFO ? "info" : | |
135 | level == OSSL_CMP_LOG_DEBUG ? "DEBUG" : "(unknown level)"; | |
136 | ||
137 | #ifndef NDEBUG | |
138 | if (BIO_printf(bio, "%s:%s:%d:", improve_location_name(component, "CMP"), | |
139 | file, line) < 0) | |
140 | return 0; | |
141 | #endif | |
142 | return BIO_printf(bio, OSSL_CMP_LOG_PREFIX"%s: %s\n", | |
143 | level_string, msg) >= 0; | |
144 | } | |
7960dbec | 145 | |
31b28ad9 | 146 | #define ERR_PRINT_BUF_SIZE 4096 |
7960dbec | 147 | /* this is similar to ERR_print_errors_cb, but uses the CMP-specific cb type */ |
7e765f46 | 148 | void OSSL_CMP_print_errors_cb(OSSL_CMP_log_cb_t log_fn) |
7960dbec DDO |
149 | { |
150 | unsigned long err; | |
31b28ad9 | 151 | char msg[ERR_PRINT_BUF_SIZE]; |
7960dbec DDO |
152 | const char *file = NULL, *func = NULL, *data = NULL; |
153 | int line, flags; | |
154 | ||
7960dbec | 155 | while ((err = ERR_get_error_all(&file, &line, &func, &data, &flags)) != 0) { |
ebf30069 DDO |
156 | const char *component = |
157 | improve_location_name(func, ERR_lib_error_string(err)); | |
7960dbec DDO |
158 | |
159 | if (!(flags & ERR_TXT_STRING)) | |
160 | data = NULL; | |
ebf30069 DDO |
161 | BIO_snprintf(msg, sizeof(msg), "%s%s%s", ERR_reason_error_string(err), |
162 | data == NULL || *data == '\0' ? "" : " : ", | |
163 | data == NULL ? "" : data); | |
164 | if (log_fn == NULL) { | |
165 | #ifndef OPENSSL_NO_STDIO | |
166 | BIO *bio = BIO_new_fp(stderr, BIO_NOCLOSE); | |
167 | ||
168 | if (bio != NULL) { | |
169 | OSSL_CMP_print_to_bio(bio, component, file, line, | |
170 | OSSL_CMP_LOG_ERR, msg); | |
171 | BIO_free(bio); | |
172 | } | |
7960dbec | 173 | #else |
ebf30069 | 174 | /* CMPerr(0, CMP_R_NO_STDIO) makes no sense during error printing */ |
7960dbec | 175 | #endif |
ebf30069 DDO |
176 | } else { |
177 | if (log_fn(component, file, line, OSSL_CMP_LOG_ERR, msg) <= 0) | |
178 | break; /* abort outputting the error report */ | |
179 | } | |
7960dbec DDO |
180 | } |
181 | } | |
182 | ||
7960dbec | 183 | int ossl_cmp_X509_STORE_add1_certs(X509_STORE *store, STACK_OF(X509) *certs, |
0d8dbb52 | 184 | int only_self_signed) |
7960dbec DDO |
185 | { |
186 | int i; | |
187 | ||
188 | if (store == NULL) { | |
189 | CMPerr(0, CMP_R_NULL_ARGUMENT); | |
190 | return 0; | |
191 | } | |
192 | if (certs == NULL) | |
193 | return 1; | |
194 | for (i = 0; i < sk_X509_num(certs); i++) { | |
195 | X509 *cert = sk_X509_value(certs, i); | |
196 | ||
0d8dbb52 | 197 | if (!only_self_signed || X509_self_signed(cert, 0) == 1) |
7960dbec DDO |
198 | if (!X509_STORE_add_cert(store, cert)) /* ups cert ref counter */ |
199 | return 0; | |
200 | } | |
201 | return 1; | |
202 | } | |
203 | ||
7960dbec | 204 | /*- |
15076c26 DDO |
205 | * Builds a certificate chain starting from <cert> |
206 | * using the optional list of intermediate CA certificates <certs>. | |
207 | * If <store> is NULL builds the chain as far down as possible, ignoring errors. | |
208 | * Else the chain must reach a trust anchor contained in <store>. | |
7960dbec | 209 | * |
15076c26 DDO |
210 | * Returns NULL on error, else a pointer to a stack of (up_ref'ed) certificates |
211 | * starting with given EE certificate and followed by all available intermediate | |
212 | * certificates down towards any trust anchor but without including the latter. | |
7960dbec | 213 | * |
15076c26 | 214 | * NOTE: If a non-NULL stack is returned the caller is responsible for freeing. |
28e9f62b DDO |
215 | * NOTE: In case there is more than one possibility for the chain, |
216 | * OpenSSL seems to take the first one; check X509_verify_cert() for details. | |
7960dbec | 217 | */ |
15076c26 | 218 | /* TODO this should be of more general interest and thus be exported. */ |
28e9f62b | 219 | STACK_OF(X509) |
b4250010 | 220 | *ossl_cmp_build_cert_chain(OSSL_LIB_CTX *libctx, const char *propq, |
15076c26 | 221 | X509_STORE *store, |
28e9f62b | 222 | STACK_OF(X509) *certs, X509 *cert) |
7960dbec DDO |
223 | { |
224 | STACK_OF(X509) *chain = NULL, *result = NULL; | |
15076c26 | 225 | X509_STORE *ts = store == NULL ? X509_STORE_new() : store; |
7960dbec DDO |
226 | X509_STORE_CTX *csc = NULL; |
227 | ||
15076c26 | 228 | if (ts == NULL || cert == NULL) { |
7960dbec DDO |
229 | CMPerr(0, CMP_R_NULL_ARGUMENT); |
230 | goto err; | |
231 | } | |
232 | ||
d8652be0 | 233 | if ((csc = X509_STORE_CTX_new_ex(libctx, propq)) == NULL) |
7960dbec | 234 | goto err; |
15076c26 DDO |
235 | if (store == NULL && certs != NULL |
236 | && !ossl_cmp_X509_STORE_add1_certs(ts, certs, 0)) | |
7960dbec | 237 | goto err; |
15076c26 DDO |
238 | if (!X509_STORE_CTX_init(csc, ts, cert, |
239 | store == NULL ? NULL : certs)) | |
240 | goto err; | |
241 | /* disable any cert status/revocation checking etc. */ | |
242 | X509_VERIFY_PARAM_clear_flags(X509_STORE_CTX_get0_param(csc), | |
243 | ~(X509_V_FLAG_USE_CHECK_TIME | |
244 | | X509_V_FLAG_NO_CHECK_TIME)); | |
7960dbec | 245 | |
15076c26 DDO |
246 | if (X509_verify_cert(csc) <= 0 && store != NULL) |
247 | goto err; | |
7960dbec DDO |
248 | chain = X509_STORE_CTX_get0_chain(csc); |
249 | ||
eeccc237 | 250 | /* result list to store the up_ref'ed not self-signed certificates */ |
7960dbec DDO |
251 | if ((result = sk_X509_new_null()) == NULL) |
252 | goto err; | |
eeccc237 DDO |
253 | if (!X509_add_certs(result, chain, |
254 | X509_ADD_FLAG_UP_REF | X509_ADD_FLAG_NO_DUP | |
255 | | X509_ADD_FLAG_NO_SS)) { | |
7960dbec DDO |
256 | sk_X509_free(result); |
257 | result = NULL; | |
258 | } | |
259 | ||
260 | err: | |
15076c26 DDO |
261 | if (store == NULL) |
262 | X509_STORE_free(ts); | |
7960dbec DDO |
263 | X509_STORE_CTX_free(csc); |
264 | return result; | |
265 | } | |
266 | ||
62dcd2aa DDO |
267 | int ossl_cmp_sk_ASN1_UTF8STRING_push_str(STACK_OF(ASN1_UTF8STRING) *sk, |
268 | const char *text) | |
269 | { | |
270 | ASN1_UTF8STRING *utf8string; | |
271 | ||
272 | if (!ossl_assert(sk != NULL && text != NULL)) | |
273 | return 0; | |
274 | if ((utf8string = ASN1_UTF8STRING_new()) == NULL) | |
275 | return 0; | |
276 | if (!ASN1_STRING_set(utf8string, text, -1)) | |
277 | goto err; | |
278 | if (!sk_ASN1_UTF8STRING_push(sk, utf8string)) | |
279 | goto err; | |
280 | return 1; | |
281 | ||
282 | err: | |
283 | ASN1_UTF8STRING_free(utf8string); | |
284 | return 0; | |
285 | } | |
286 | ||
7960dbec DDO |
287 | int ossl_cmp_asn1_octet_string_set1(ASN1_OCTET_STRING **tgt, |
288 | const ASN1_OCTET_STRING *src) | |
289 | { | |
59ae04d7 | 290 | ASN1_OCTET_STRING *new; |
7960dbec DDO |
291 | if (tgt == NULL) { |
292 | CMPerr(0, CMP_R_NULL_ARGUMENT); | |
293 | return 0; | |
294 | } | |
295 | if (*tgt == src) /* self-assignment */ | |
296 | return 1; | |
7960dbec DDO |
297 | |
298 | if (src != NULL) { | |
59ae04d7 | 299 | if ((new = ASN1_OCTET_STRING_dup(src)) == NULL) |
7960dbec DDO |
300 | return 0; |
301 | } else { | |
59ae04d7 | 302 | new = NULL; |
7960dbec DDO |
303 | } |
304 | ||
59ae04d7 | 305 | ASN1_OCTET_STRING_free(*tgt); |
306 | *tgt = new; | |
7960dbec DDO |
307 | return 1; |
308 | } | |
309 | ||
310 | int ossl_cmp_asn1_octet_string_set1_bytes(ASN1_OCTET_STRING **tgt, | |
311 | const unsigned char *bytes, int len) | |
312 | { | |
313 | ASN1_OCTET_STRING *new = NULL; | |
314 | ||
315 | if (tgt == NULL) { | |
316 | CMPerr(0, CMP_R_NULL_ARGUMENT); | |
317 | return 0; | |
318 | } | |
319 | if (bytes != NULL) { | |
ebf30069 | 320 | if ((new = ASN1_OCTET_STRING_new()) == NULL |
7960dbec DDO |
321 | || !(ASN1_OCTET_STRING_set(new, bytes, len))) { |
322 | ASN1_OCTET_STRING_free(new); | |
323 | return 0; | |
324 | } | |
325 | } | |
326 | ||
327 | ASN1_OCTET_STRING_free(*tgt); | |
328 | *tgt = new; | |
329 | return 1; | |
330 | } |