Bug Summary

File:out/../deps/openssl/openssl/crypto/x509/v3_ncons.c
Warning:line 741, column 17
Value stored to 'hostptr' during its initialization is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name v3_ncons.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/home/maurizio/node-v18.6.0/out -resource-dir /usr/local/lib/clang/16.0.0 -D V8_DEPRECATION_WARNINGS -D V8_IMMINENT_DEPRECATION_WARNINGS -D _GLIBCXX_USE_CXX11_ABI=1 -D NODE_OPENSSL_CONF_NAME=nodejs_conf -D NODE_OPENSSL_HAS_QUIC -D __STDC_FORMAT_MACROS -D OPENSSL_NO_PINSHARED -D OPENSSL_THREADS -D OPENSSL_NO_HW -D OPENSSL_API_COMPAT=0x10100001L -D STATIC_LEGACY -D NDEBUG -D OPENSSL_USE_NODELETE -D L_ENDIAN -D OPENSSL_BUILDING_OPENSSL -D AES_ASM -D BSAES_ASM -D CMLL_ASM -D ECP_NISTZ256_ASM -D GHASH_ASM -D KECCAK1600_ASM -D MD5_ASM -D OPENSSL_BN_ASM_GF2m -D OPENSSL_BN_ASM_MONT -D OPENSSL_BN_ASM_MONT5 -D OPENSSL_CPUID_OBJ -D OPENSSL_IA32_SSE2 -D PADLOCK_ASM -D POLY1305_ASM -D SHA1_ASM -D SHA256_ASM -D SHA512_ASM -D VPAES_ASM -D WHIRLPOOL_ASM -D X25519_ASM -D OPENSSL_PIC -D MODULESDIR="/home/maurizio/node-v18.6.0/out/Release/obj.target/deps/openssl/lib/openssl-modules" -D OPENSSLDIR="/home/maurizio/node-v18.6.0/out/Release/obj.target/deps/openssl" -D OPENSSLDIR="/etc/ssl" -D ENGINESDIR="/dev/null" -D TERMIOS -I ../deps/openssl/openssl -I ../deps/openssl/openssl/include -I ../deps/openssl/openssl/crypto -I ../deps/openssl/openssl/crypto/include -I ../deps/openssl/openssl/crypto/modes -I ../deps/openssl/openssl/crypto/ec/curve448 -I ../deps/openssl/openssl/crypto/ec/curve448/arch_32 -I ../deps/openssl/openssl/providers/common/include -I ../deps/openssl/openssl/providers/implementations/include -I ../deps/openssl/config -I ../deps/openssl/config/archs/linux-x86_64/asm -I ../deps/openssl/config/archs/linux-x86_64/asm/include -I ../deps/openssl/config/archs/linux-x86_64/asm/crypto -I ../deps/openssl/config/archs/linux-x86_64/asm/crypto/include/internal -I ../deps/openssl/config/archs/linux-x86_64/asm/providers/common/include -internal-isystem /usr/local/lib/clang/16.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/8/../../../../x86_64-redhat-linux/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-unused-parameter -Wno-missing-field-initializers -Wno-old-style-declaration -fdebug-compilation-dir=/home/maurizio/node-v18.6.0/out -ferror-limit 19 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-08-22-142216-507842-1 -x c ../deps/openssl/openssl/crypto/x509/v3_ncons.c
1/*
2 * Copyright 2003-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 "internal/cryptlib.h"
11#include "internal/numbers.h"
12#include <stdio.h>
13#include "crypto/asn1.h"
14#include <openssl/asn1t.h>
15#include <openssl/conf.h>
16#include <openssl/x509v3.h>
17#include <openssl/bn.h>
18
19#include "crypto/x509.h"
20#include "crypto/punycode.h"
21#include "ext_dat.h"
22
23static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
24 X509V3_CTX *ctx,
25 STACK_OF(CONF_VALUE)struct stack_st_CONF_VALUE *nval);
26static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
27 BIO *bp, int ind);
28static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
29 STACK_OF(GENERAL_SUBTREE)struct stack_st_GENERAL_SUBTREE *trees, BIO *bp,
30 int ind, const char *name);
31static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
32
33static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
34static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen);
35static int nc_dn(const X509_NAME *sub, const X509_NAME *nm);
36static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
37static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);
38static int nc_email_eai(ASN1_TYPE *emltype, ASN1_IA5STRING *base);
39static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base);
40static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base);
41
42const X509V3_EXT_METHOD ossl_v3_name_constraints = {
43 NID_name_constraints666, 0,
44 ASN1_ITEM_ref(NAME_CONSTRAINTS)(NAME_CONSTRAINTS_it),
45 0, 0, 0, 0,
46 0, 0,
47 0, v2i_NAME_CONSTRAINTS,
48 i2r_NAME_CONSTRAINTS, 0,
49 NULL((void*)0)
50};
51
52ASN1_SEQUENCE(GENERAL_SUBTREE)static const ASN1_TEMPLATE GENERAL_SUBTREE_seq_tt[] = {
53 ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME){ (0), (0), __builtin_offsetof(GENERAL_SUBTREE, base), "base"
, (GENERAL_NAME_it) },
54 ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0){ (((0x1 << 3)|(0x2<<6)) | ((0x1))), (0), __builtin_offsetof
(GENERAL_SUBTREE, minimum), "minimum", (ASN1_INTEGER_it) },
55 ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1){ (((0x1 << 3)|(0x2<<6)) | ((0x1))), (1), __builtin_offsetof
(GENERAL_SUBTREE, maximum), "maximum", (ASN1_INTEGER_it) }
56} ASN1_SEQUENCE_END(GENERAL_SUBTREE); const ASN1_ITEM * GENERAL_SUBTREE_it(void) { static const ASN1_ITEM
local_it = { 0x1, 16, GENERAL_SUBTREE_seq_tt, sizeof(GENERAL_SUBTREE_seq_tt
) / sizeof(ASN1_TEMPLATE), ((void*)0), sizeof(GENERAL_SUBTREE
), "GENERAL_SUBTREE" }; return &local_it; }
57
58ASN1_SEQUENCE(NAME_CONSTRAINTS)static const ASN1_TEMPLATE NAME_CONSTRAINTS_seq_tt[] = {
59 ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees,{ (((0x1 << 3)|(0x2<<6)) | ((0x2 << 1)|(0x1
))), (0), __builtin_offsetof(NAME_CONSTRAINTS, permittedSubtrees
), "permittedSubtrees", (GENERAL_SUBTREE_it) }
60 GENERAL_SUBTREE, 0){ (((0x1 << 3)|(0x2<<6)) | ((0x2 << 1)|(0x1
))), (0), __builtin_offsetof(NAME_CONSTRAINTS, permittedSubtrees
), "permittedSubtrees", (GENERAL_SUBTREE_it) },
61 ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees,{ (((0x1 << 3)|(0x2<<6)) | ((0x2 << 1)|(0x1
))), (1), __builtin_offsetof(NAME_CONSTRAINTS, excludedSubtrees
), "excludedSubtrees", (GENERAL_SUBTREE_it) }
62 GENERAL_SUBTREE, 1){ (((0x1 << 3)|(0x2<<6)) | ((0x2 << 1)|(0x1
))), (1), __builtin_offsetof(NAME_CONSTRAINTS, excludedSubtrees
), "excludedSubtrees", (GENERAL_SUBTREE_it) },
63} ASN1_SEQUENCE_END(NAME_CONSTRAINTS); const ASN1_ITEM * NAME_CONSTRAINTS_it(void) { static const ASN1_ITEM
local_it = { 0x1, 16, NAME_CONSTRAINTS_seq_tt, sizeof(NAME_CONSTRAINTS_seq_tt
) / sizeof(ASN1_TEMPLATE), ((void*)0), sizeof(NAME_CONSTRAINTS
), "NAME_CONSTRAINTS" }; return &local_it; }
64
65
66IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE)GENERAL_SUBTREE *GENERAL_SUBTREE_new(void) { return (GENERAL_SUBTREE
*)ASN1_item_new((GENERAL_SUBTREE_it())); } void GENERAL_SUBTREE_free
(GENERAL_SUBTREE *a) { ASN1_item_free((ASN1_VALUE *)a, (GENERAL_SUBTREE_it
())); }
67IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS)NAME_CONSTRAINTS *NAME_CONSTRAINTS_new(void) { return (NAME_CONSTRAINTS
*)ASN1_item_new((NAME_CONSTRAINTS_it())); } void NAME_CONSTRAINTS_free
(NAME_CONSTRAINTS *a) { ASN1_item_free((ASN1_VALUE *)a, (NAME_CONSTRAINTS_it
())); }
68
69
70#define IA5_OFFSET_LEN(ia5base, offset)((ia5base)->length - ((unsigned char *)(offset) - (ia5base
)->data)) \
71 ((ia5base)->length - ((unsigned char *)(offset) - (ia5base)->data))
72
73/* Like memchr but for ASN1_IA5STRING. Additionally you can specify the
74 * starting point to search from
75 */
76# define ia5memchr(str, start, c)memchr(start, c, ((str)->length - ((unsigned char *)(start
) - (str)->data))) memchr(start, c, IA5_OFFSET_LEN(str, start)((str)->length - ((unsigned char *)(start) - (str)->data
)))
77
78/* Like memrrchr but for ASN1_IA5STRING */
79static char *ia5memrchr(ASN1_IA5STRING *str, int c)
80{
81 int i;
82
83 for (i = str->length; i > 0 && str->data[i - 1] != c; i--);
84
85 if (i == 0)
86 return NULL((void*)0);
87
88 return (char *)&str->data[i - 1];
89}
90
91/*
92 * We cannot use strncasecmp here because that applies locale specific rules. It
93 * also doesn't work with ASN1_STRINGs that may have embedded NUL characters.
94 * For example in Turkish 'I' is not the uppercase character for 'i'. We need to
95 * do a simple ASCII case comparison ignoring the locale (that is why we use
96 * numeric constants below).
97 */
98static int ia5ncasecmp(const char *s1, const char *s2, size_t n)
99{
100 for (; n > 0; n--, s1++, s2++) {
101 if (*s1 != *s2) {
102 unsigned char c1 = (unsigned char)*s1, c2 = (unsigned char)*s2;
103
104 /* Convert to lower case */
105 if (c1 >= 0x41 /* A */ && c1 <= 0x5A /* Z */)
106 c1 += 0x20;
107 if (c2 >= 0x41 /* A */ && c2 <= 0x5A /* Z */)
108 c2 += 0x20;
109
110 if (c1 == c2)
111 continue;
112
113 if (c1 < c2)
114 return -1;
115
116 /* c1 > c2 */
117 return 1;
118 }
119 }
120
121 return 0;
122}
123
124static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
125 X509V3_CTX *ctx, STACK_OF(CONF_VALUE)struct stack_st_CONF_VALUE *nval)
126{
127 int i;
128 CONF_VALUE tval, *val;
129 STACK_OF(GENERAL_SUBTREE)struct stack_st_GENERAL_SUBTREE **ptree = NULL((void*)0);
130 NAME_CONSTRAINTS *ncons = NULL((void*)0);
131 GENERAL_SUBTREE *sub = NULL((void*)0);
132
133 ncons = NAME_CONSTRAINTS_new();
134 if (ncons == NULL((void*)0))
135 goto memerr;
136 for (i = 0; i < sk_CONF_VALUE_num(nval)OPENSSL_sk_num(ossl_check_const_CONF_VALUE_sk_type(nval)); i++) {
137 val = sk_CONF_VALUE_value(nval, i)((CONF_VALUE *)OPENSSL_sk_value(ossl_check_const_CONF_VALUE_sk_type
(nval), (i)));
138 if (strncmp(val->name, "permitted", 9) == 0 && val->name[9]) {
139 ptree = &ncons->permittedSubtrees;
140 tval.name = val->name + 10;
141 } else if (strncmp(val->name, "excluded", 8) == 0 && val->name[8]) {
142 ptree = &ncons->excludedSubtrees;
143 tval.name = val->name + 9;
144 } else {
145 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_SYNTAX)(ERR_new(), ERR_set_debug("../deps/openssl/openssl/crypto/x509/v3_ncons.c"
,145,__func__), ERR_set_error)((34),(143),((void*)0));
146 goto err;
147 }
148 tval.value = val->value;
149 sub = GENERAL_SUBTREE_new();
150 if (sub == NULL((void*)0))
151 goto memerr;
152 if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
153 goto err;
154 if (*ptree == NULL((void*)0))
155 *ptree = sk_GENERAL_SUBTREE_new_null()((struct stack_st_GENERAL_SUBTREE *)OPENSSL_sk_new_null());
156 if (*ptree == NULL((void*)0) || !sk_GENERAL_SUBTREE_push(*ptree, sub)OPENSSL_sk_push(ossl_check_GENERAL_SUBTREE_sk_type(*ptree), ossl_check_GENERAL_SUBTREE_type
(sub)))
157 goto memerr;
158 sub = NULL((void*)0);
159 }
160
161 return ncons;
162
163 memerr:
164 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE)(ERR_new(), ERR_set_debug("../deps/openssl/openssl/crypto/x509/v3_ncons.c"
,164,__func__), ERR_set_error)((34),((256|((0x1 << 18L)
|(0x2 << 18L)))),((void*)0));
165 err:
166 NAME_CONSTRAINTS_free(ncons);
167 GENERAL_SUBTREE_free(sub);
168
169 return NULL((void*)0);
170}
171
172static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
173 BIO *bp, int ind)
174{
175 NAME_CONSTRAINTS *ncons = a;
176 do_i2r_name_constraints(method, ncons->permittedSubtrees,
177 bp, ind, "Permitted");
178 if (ncons->permittedSubtrees && ncons->excludedSubtrees)
179 BIO_puts(bp, "\n");
180 do_i2r_name_constraints(method, ncons->excludedSubtrees,
181 bp, ind, "Excluded");
182 return 1;
183}
184
185static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
186 STACK_OF(GENERAL_SUBTREE)struct stack_st_GENERAL_SUBTREE *trees,
187 BIO *bp, int ind, const char *name)
188{
189 GENERAL_SUBTREE *tree;
190 int i;
191 if (sk_GENERAL_SUBTREE_num(trees)OPENSSL_sk_num(ossl_check_const_GENERAL_SUBTREE_sk_type(trees
)) > 0)
192 BIO_printf(bp, "%*s%s:\n", ind, "", name);
193 for (i = 0; i < sk_GENERAL_SUBTREE_num(trees)OPENSSL_sk_num(ossl_check_const_GENERAL_SUBTREE_sk_type(trees
)); i++) {
194 if (i > 0)
195 BIO_puts(bp, "\n");
196 tree = sk_GENERAL_SUBTREE_value(trees, i)((GENERAL_SUBTREE *)OPENSSL_sk_value(ossl_check_const_GENERAL_SUBTREE_sk_type
(trees), (i)));
197 BIO_printf(bp, "%*s", ind + 2, "");
198 if (tree->base->type == GEN_IPADD7)
199 print_nc_ipadd(bp, tree->base->d.ip);
200 else
201 GENERAL_NAME_print(bp, tree->base);
202 }
203 return 1;
204}
205
206static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip)
207{
208 /* ip->length should be 8 or 32 and len1 == len2 == 4 or len1 == len2 == 16 */
209 int len1 = ip->length >= 16 ? 16 : ip->length >= 4 ? 4 : ip->length;
210 int len2 = ip->length - len1;
211 char *ip1 = ossl_ipaddr_to_asc(ip->data, len1);
212 char *ip2 = ossl_ipaddr_to_asc(ip->data + len1, len2);
213 int ret = ip1 != NULL((void*)0) && ip2 != NULL((void*)0)
214 && BIO_printf(bp, "IP:%s/%s", ip1, ip2) > 0;
215
216 OPENSSL_free(ip1)CRYPTO_free(ip1, "../deps/openssl/openssl/crypto/x509/v3_ncons.c"
, 216);
217 OPENSSL_free(ip2)CRYPTO_free(ip2, "../deps/openssl/openssl/crypto/x509/v3_ncons.c"
, 217);
218 return ret;
219}
220
221#define NAME_CHECK_MAX(1 << 20) (1 << 20)
222
223static int add_lengths(int *out, int a, int b)
224{
225 /* sk_FOO_num(NULL) returns -1 but is effectively 0 when iterating. */
226 if (a < 0)
227 a = 0;
228 if (b < 0)
229 b = 0;
230
231 if (a > INT_MAX2147483647 - b)
232 return 0;
233 *out = a + b;
234 return 1;
235}
236
237/*-
238 * Check a certificate conforms to a specified set of constraints.
239 * Return values:
240 * X509_V_OK: All constraints obeyed.
241 * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation.
242 * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation.
243 * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type.
244 * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type.
245 * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax.
246 * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name
247 */
248
249int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc)
250{
251 int r, i, name_count, constraint_count;
252 X509_NAME *nm;
253
254 nm = X509_get_subject_name(x);
255
256 /*
257 * Guard against certificates with an excessive number of names or
258 * constraints causing a computationally expensive name constraints check.
259 */
260 if (!add_lengths(&name_count, X509_NAME_entry_count(nm),
261 sk_GENERAL_NAME_num(x->altname)OPENSSL_sk_num(ossl_check_const_GENERAL_NAME_sk_type(x->altname
)))
262 || !add_lengths(&constraint_count,
263 sk_GENERAL_SUBTREE_num(nc->permittedSubtrees)OPENSSL_sk_num(ossl_check_const_GENERAL_SUBTREE_sk_type(nc->
permittedSubtrees)),
264 sk_GENERAL_SUBTREE_num(nc->excludedSubtrees)OPENSSL_sk_num(ossl_check_const_GENERAL_SUBTREE_sk_type(nc->
excludedSubtrees)))
265 || (name_count > 0 && constraint_count > NAME_CHECK_MAX(1 << 20) / name_count))
266 return X509_V_ERR_UNSPECIFIED1;
267
268 if (X509_NAME_entry_count(nm) > 0) {
269 GENERAL_NAME gntmp;
270 gntmp.type = GEN_DIRNAME4;
271 gntmp.d.directoryName = nm;
272
273 r = nc_match(&gntmp, nc);
274
275 if (r != X509_V_OK0)
276 return r;
277
278 gntmp.type = GEN_EMAIL1;
279
280 /* Process any email address attributes in subject name */
281
282 for (i = -1;;) {
283 const X509_NAME_ENTRY *ne;
284
285 i = X509_NAME_get_index_by_NID(nm, NID_pkcs9_emailAddress48, i);
286 if (i == -1)
287 break;
288 ne = X509_NAME_get_entry(nm, i);
289 gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne);
290 if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING22)
291 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
292
293 r = nc_match(&gntmp, nc);
294
295 if (r != X509_V_OK0)
296 return r;
297 }
298
299 }
300
301 for (i = 0; i < sk_GENERAL_NAME_num(x->altname)OPENSSL_sk_num(ossl_check_const_GENERAL_NAME_sk_type(x->altname
)); i++) {
302 GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i)((GENERAL_NAME *)OPENSSL_sk_value(ossl_check_const_GENERAL_NAME_sk_type
(x->altname), (i)));
303 r = nc_match(gen, nc);
304 if (r != X509_V_OK0)
305 return r;
306 }
307
308 return X509_V_OK0;
309
310}
311
312static int cn2dnsid(ASN1_STRING *cn, unsigned char **dnsid, size_t *idlen)
313{
314 int utf8_length;
315 unsigned char *utf8_value;
316 int i;
317 int isdnsname = 0;
318
319 /* Don't leave outputs uninitialized */
320 *dnsid = NULL((void*)0);
321 *idlen = 0;
322
323 /*-
324 * Per RFC 6125, DNS-IDs representing internationalized domain names appear
325 * in certificates in A-label encoded form:
326 *
327 * https://tools.ietf.org/html/rfc6125#section-6.4.2
328 *
329 * The same applies to CNs which are intended to represent DNS names.
330 * However, while in the SAN DNS-IDs are IA5Strings, as CNs they may be
331 * needlessly encoded in 16-bit Unicode. We perform a conversion to UTF-8
332 * to ensure that we get an ASCII representation of any CNs that are
333 * representable as ASCII, but just not encoded as ASCII. The UTF-8 form
334 * may contain some non-ASCII octets, and that's fine, such CNs are not
335 * valid legacy DNS names.
336 *
337 * Note, 'int' is the return type of ASN1_STRING_to_UTF8() so that's what
338 * we must use for 'utf8_length'.
339 */
340 if ((utf8_length = ASN1_STRING_to_UTF8(&utf8_value, cn)) < 0)
341 return X509_V_ERR_OUT_OF_MEM17;
342
343 /*
344 * Some certificates have had names that include a *trailing* NUL byte.
345 * Remove these harmless NUL characters. They would otherwise yield false
346 * alarms with the following embedded NUL check.
347 */
348 while (utf8_length > 0 && utf8_value[utf8_length - 1] == '\0')
349 --utf8_length;
350
351 /* Reject *embedded* NULs */
352 if (memchr(utf8_value, 0, utf8_length) != NULL((void*)0)) {
353 OPENSSL_free(utf8_value)CRYPTO_free(utf8_value, "../deps/openssl/openssl/crypto/x509/v3_ncons.c"
, 353);
354 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
355 }
356
357 /*
358 * XXX: Deviation from strict DNS name syntax, also check names with '_'
359 * Check DNS name syntax, any '-' or '.' must be internal,
360 * and on either side of each '.' we can't have a '-' or '.'.
361 *
362 * If the name has just one label, we don't consider it a DNS name. This
363 * means that "CN=sometld" cannot be precluded by DNS name constraints, but
364 * that is not a problem.
365 */
366 for (i = 0; i < utf8_length; ++i) {
367 unsigned char c = utf8_value[i];
368
369 if ((c >= 'a' && c <= 'z')
370 || (c >= 'A' && c <= 'Z')
371 || (c >= '0' && c <= '9')
372 || c == '_')
373 continue;
374
375 /* Dot and hyphen cannot be first or last. */
376 if (i > 0 && i < utf8_length - 1) {
377 if (c == '-')
378 continue;
379 /*
380 * Next to a dot the preceding and following characters must not be
381 * another dot or a hyphen. Otherwise, record that the name is
382 * plausible, since it has two or more labels.
383 */
384 if (c == '.'
385 && utf8_value[i + 1] != '.'
386 && utf8_value[i - 1] != '-'
387 && utf8_value[i + 1] != '-') {
388 isdnsname = 1;
389 continue;
390 }
391 }
392 isdnsname = 0;
393 break;
394 }
395
396 if (isdnsname) {
397 *dnsid = utf8_value;
398 *idlen = (size_t)utf8_length;
399 return X509_V_OK0;
400 }
401 OPENSSL_free(utf8_value)CRYPTO_free(utf8_value, "../deps/openssl/openssl/crypto/x509/v3_ncons.c"
, 401);
402 return X509_V_OK0;
403}
404
405/*
406 * Check CN against DNS-ID name constraints.
407 */
408int NAME_CONSTRAINTS_check_CN(X509 *x, NAME_CONSTRAINTS *nc)
409{
410 int r, i;
411 const X509_NAME *nm = X509_get_subject_name(x);
412 ASN1_STRING stmp;
413 GENERAL_NAME gntmp;
414
415 stmp.flags = 0;
416 stmp.type = V_ASN1_IA5STRING22;
417 gntmp.type = GEN_DNS2;
418 gntmp.d.dNSName = &stmp;
419
420 /* Process any commonName attributes in subject name */
421
422 for (i = -1;;) {
423 X509_NAME_ENTRY *ne;
424 ASN1_STRING *cn;
425 unsigned char *idval;
426 size_t idlen;
427
428 i = X509_NAME_get_index_by_NID(nm, NID_commonName13, i);
429 if (i == -1)
430 break;
431 ne = X509_NAME_get_entry(nm, i);
432 cn = X509_NAME_ENTRY_get_data(ne);
433
434 /* Only process attributes that look like host names */
435 if ((r = cn2dnsid(cn, &idval, &idlen)) != X509_V_OK0)
436 return r;
437 if (idlen == 0)
438 continue;
439
440 stmp.length = idlen;
441 stmp.data = idval;
442 r = nc_match(&gntmp, nc);
443 OPENSSL_free(idval)CRYPTO_free(idval, "../deps/openssl/openssl/crypto/x509/v3_ncons.c"
, 443);
444 if (r != X509_V_OK0)
445 return r;
446 }
447 return X509_V_OK0;
448}
449
450/*
451 * Return nonzero if the GeneralSubtree has valid 'minimum' field
452 * (must be absent or 0) and valid 'maximum' field (must be absent).
453 */
454static int nc_minmax_valid(GENERAL_SUBTREE *sub) {
455 BIGNUM *bn = NULL((void*)0);
456 int ok = 1;
457
458 if (sub->maximum)
459 ok = 0;
460
461 if (sub->minimum) {
462 bn = ASN1_INTEGER_to_BN(sub->minimum, NULL((void*)0));
463 if (bn == NULL((void*)0) || !BN_is_zero(bn))
464 ok = 0;
465 BN_free(bn);
466 }
467
468 return ok;
469}
470
471static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc)
472{
473 GENERAL_SUBTREE *sub;
474 int i, r, match = 0;
475 /*
476 * We need to compare not gen->type field but an "effective" type because
477 * the otherName field may contain EAI email address treated specially
478 * according to RFC 8398, section 6
479 */
480 int effective_type = ((gen->type == GEN_OTHERNAME0) &&
481 (OBJ_obj2nid(gen->d.otherName->type_id) ==
482 NID_id_on_SmtpUTF8Mailbox1208)) ? GEN_EMAIL1 : gen->type;
483
484 /*
485 * Permitted subtrees: if any subtrees exist of matching the type at
486 * least one subtree must match.
487 */
488
489 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees)OPENSSL_sk_num(ossl_check_const_GENERAL_SUBTREE_sk_type(nc->
permittedSubtrees)); i++) {
490 sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i)((GENERAL_SUBTREE *)OPENSSL_sk_value(ossl_check_const_GENERAL_SUBTREE_sk_type
(nc->permittedSubtrees), (i)));
491 if (effective_type != sub->base->type)
492 continue;
493 if (!nc_minmax_valid(sub))
494 return X509_V_ERR_SUBTREE_MINMAX49;
495 /* If we already have a match don't bother trying any more */
496 if (match == 2)
497 continue;
498 if (match == 0)
499 match = 1;
500 r = nc_match_single(gen, sub->base);
501 if (r == X509_V_OK0)
502 match = 2;
503 else if (r != X509_V_ERR_PERMITTED_VIOLATION47)
504 return r;
505 }
506
507 if (match == 1)
508 return X509_V_ERR_PERMITTED_VIOLATION47;
509
510 /* Excluded subtrees: must not match any of these */
511
512 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees)OPENSSL_sk_num(ossl_check_const_GENERAL_SUBTREE_sk_type(nc->
excludedSubtrees)); i++) {
513 sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i)((GENERAL_SUBTREE *)OPENSSL_sk_value(ossl_check_const_GENERAL_SUBTREE_sk_type
(nc->excludedSubtrees), (i)));
514 if (effective_type != sub->base->type)
515 continue;
516 if (!nc_minmax_valid(sub))
517 return X509_V_ERR_SUBTREE_MINMAX49;
518
519 r = nc_match_single(gen, sub->base);
520 if (r == X509_V_OK0)
521 return X509_V_ERR_EXCLUDED_VIOLATION48;
522 else if (r != X509_V_ERR_PERMITTED_VIOLATION47)
523 return r;
524
525 }
526
527 return X509_V_OK0;
528
529}
530
531static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base)
532{
533 switch (gen->type) {
534 case GEN_OTHERNAME0:
535 /*
536 * We are here only when we have SmtpUTF8 name,
537 * so we match the value of othername with base->d.rfc822Name
538 */
539 return nc_email_eai(gen->d.otherName->value, base->d.rfc822Name);
540
541 case GEN_DIRNAME4:
542 return nc_dn(gen->d.directoryName, base->d.directoryName);
543
544 case GEN_DNS2:
545 return nc_dns(gen->d.dNSName, base->d.dNSName);
546
547 case GEN_EMAIL1:
548 return nc_email(gen->d.rfc822Name, base->d.rfc822Name);
549
550 case GEN_URI6:
551 return nc_uri(gen->d.uniformResourceIdentifier,
552 base->d.uniformResourceIdentifier);
553
554 case GEN_IPADD7:
555 return nc_ip(gen->d.iPAddress, base->d.iPAddress);
556
557 default:
558 return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE51;
559 }
560
561}
562
563/*
564 * directoryName name constraint matching. The canonical encoding of
565 * X509_NAME makes this comparison easy. It is matched if the subtree is a
566 * subset of the name.
567 */
568
569static int nc_dn(const X509_NAME *nm, const X509_NAME *base)
570{
571 /* Ensure canonical encodings are up to date. */
572 if (nm->modified && i2d_X509_NAME(nm, NULL((void*)0)) < 0)
573 return X509_V_ERR_OUT_OF_MEM17;
574 if (base->modified && i2d_X509_NAME(base, NULL((void*)0)) < 0)
575 return X509_V_ERR_OUT_OF_MEM17;
576 if (base->canon_enclen > nm->canon_enclen)
577 return X509_V_ERR_PERMITTED_VIOLATION47;
578 if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen))
579 return X509_V_ERR_PERMITTED_VIOLATION47;
580 return X509_V_OK0;
581}
582
583static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
584{
585 char *baseptr = (char *)base->data;
586 char *dnsptr = (char *)dns->data;
587
588 /* Empty matches everything */
589 if (base->length == 0)
590 return X509_V_OK0;
591
592 if (dns->length < base->length)
593 return X509_V_ERR_PERMITTED_VIOLATION47;
594
595 /*
596 * Otherwise can add zero or more components on the left so compare RHS
597 * and if dns is longer and expect '.' as preceding character.
598 */
599 if (dns->length > base->length) {
600 dnsptr += dns->length - base->length;
601 if (*baseptr != '.' && dnsptr[-1] != '.')
602 return X509_V_ERR_PERMITTED_VIOLATION47;
603 }
604
605 if (ia5ncasecmp(baseptr, dnsptr, base->length))
606 return X509_V_ERR_PERMITTED_VIOLATION47;
607
608 return X509_V_OK0;
609
610}
611
612/*
613 * This function implements comparison between ASCII/U-label in emltype
614 * and A-label in base according to RFC 8398, section 6.
615 * Convert base to U-label and ASCII-parts of domain names, for base
616 * Octet-to-octet comparison of `emltype` and `base` hostname parts
617 * (ASCII-parts should be compared in case-insensitive manner)
618 */
619static int nc_email_eai(ASN1_TYPE *emltype, ASN1_IA5STRING *base)
620{
621 ASN1_UTF8STRING *eml;
622 char *baseptr = NULL((void*)0);
623 const char *emlptr;
624 const char *emlat;
625 char ulabel[256];
626 size_t size = sizeof(ulabel) - 1;
627 int ret = X509_V_OK0;
628 size_t emlhostlen;
629
630 /* We do not accept embedded NUL characters */
631 if (base->length > 0 && memchr(base->data, 0, base->length) != NULL((void*)0))
632 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
633
634 /* 'base' may not be NUL terminated. Create a copy that is */
635 baseptr = OPENSSL_strndup((char *)base->data, base->length)CRYPTO_strndup((char *)base->data, base->length, "../deps/openssl/openssl/crypto/x509/v3_ncons.c"
, 635);
636 if (baseptr == NULL((void*)0))
637 return X509_V_ERR_OUT_OF_MEM17;
638
639 if (emltype->type != V_ASN1_UTF8STRING12) {
640 ret = X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
641 goto end;
642 }
643
644 eml = emltype->value.utf8string;
645 emlptr = (char *)eml->data;
646 emlat = ia5memrchr(eml, '@');
647
648 if (emlat == NULL((void*)0)) {
649 ret = X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
650 goto end;
651 }
652
653 memset(ulabel, 0, sizeof(ulabel));
654 /* Special case: initial '.' is RHS match */
655 if (*baseptr == '.') {
656 ulabel[0] = '.';
657 size -= 1;
658 if (ossl_a2ulabel(baseptr, ulabel + 1, &size) <= 0) {
659 ret = X509_V_ERR_UNSPECIFIED1;
660 goto end;
661 }
662
663 if ((size_t)eml->length > strlen(ulabel)) {
664 emlptr += eml->length - (strlen(ulabel));
665 /* X509_V_OK */
666 if (ia5ncasecmp(ulabel, emlptr, strlen(ulabel)) == 0)
667 goto end;
668 }
669 ret = X509_V_ERR_PERMITTED_VIOLATION47;
670 goto end;
671 }
672
673 if (ossl_a2ulabel(baseptr, ulabel, &size) <= 0) {
674 ret = X509_V_ERR_UNSPECIFIED1;
675 goto end;
676 }
677 /* Just have hostname left to match: case insensitive */
678 emlptr = emlat + 1;
679 emlhostlen = IA5_OFFSET_LEN(eml, emlptr)((eml)->length - ((unsigned char *)(emlptr) - (eml)->data
));
680 if (emlhostlen != strlen(ulabel)
681 || ia5ncasecmp(ulabel, emlptr, emlhostlen) != 0) {
682 ret = X509_V_ERR_PERMITTED_VIOLATION47;
683 goto end;
684 }
685
686 end:
687 OPENSSL_free(baseptr)CRYPTO_free(baseptr, "../deps/openssl/openssl/crypto/x509/v3_ncons.c"
, 687);
688 return ret;
689}
690
691static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base)
692{
693 const char *baseptr = (char *)base->data;
694 const char *emlptr = (char *)eml->data;
695 const char *baseat = ia5memrchr(base, '@');
696 const char *emlat = ia5memrchr(eml, '@');
697 size_t basehostlen, emlhostlen;
698
699 if (!emlat)
700 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
701 /* Special case: initial '.' is RHS match */
702 if (!baseat && base->length > 0 && (*baseptr == '.')) {
703 if (eml->length > base->length) {
704 emlptr += eml->length - base->length;
705 if (ia5ncasecmp(baseptr, emlptr, base->length) == 0)
706 return X509_V_OK0;
707 }
708 return X509_V_ERR_PERMITTED_VIOLATION47;
709 }
710
711 /* If we have anything before '@' match local part */
712
713 if (baseat) {
714 if (baseat != baseptr) {
715 if ((baseat - baseptr) != (emlat - emlptr))
716 return X509_V_ERR_PERMITTED_VIOLATION47;
717 if (memchr(baseptr, 0, baseat - baseptr) ||
718 memchr(emlptr, 0, emlat - emlptr))
719 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
720 /* Case sensitive match of local part */
721 if (strncmp(baseptr, emlptr, emlat - emlptr))
722 return X509_V_ERR_PERMITTED_VIOLATION47;
723 }
724 /* Position base after '@' */
725 baseptr = baseat + 1;
726 }
727 emlptr = emlat + 1;
728 basehostlen = IA5_OFFSET_LEN(base, baseptr)((base)->length - ((unsigned char *)(baseptr) - (base)->
data));
729 emlhostlen = IA5_OFFSET_LEN(eml, emlptr)((eml)->length - ((unsigned char *)(emlptr) - (eml)->data
));
730 /* Just have hostname left to match: case insensitive */
731 if (basehostlen != emlhostlen || ia5ncasecmp(baseptr, emlptr, emlhostlen))
732 return X509_V_ERR_PERMITTED_VIOLATION47;
733
734 return X509_V_OK0;
735
736}
737
738static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
739{
740 const char *baseptr = (char *)base->data;
741 const char *hostptr = (char *)uri->data;
Value stored to 'hostptr' during its initialization is never read
742 const char *p = ia5memchr(uri, (char *)uri->data, ':')memchr((char *)uri->data, ':', ((uri)->length - ((unsigned
char *)((char *)uri->data) - (uri)->data)));
743 int hostlen;
744
745 /* Check for foo:// and skip past it */
746 if (p == NULL((void*)0)
747 || IA5_OFFSET_LEN(uri, p)((uri)->length - ((unsigned char *)(p) - (uri)->data)) < 3
748 || p[1] != '/'
749 || p[2] != '/')
750 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
751 hostptr = p + 3;
752
753 /* Determine length of hostname part of URI */
754
755 /* Look for a port indicator as end of hostname first */
756
757 p = ia5memchr(uri, hostptr, ':')memchr(hostptr, ':', ((uri)->length - ((unsigned char *)(hostptr
) - (uri)->data)));
758 /* Otherwise look for trailing slash */
759 if (p == NULL((void*)0))
760 p = ia5memchr(uri, hostptr, '/')memchr(hostptr, '/', ((uri)->length - ((unsigned char *)(hostptr
) - (uri)->data)));
761
762 if (p == NULL((void*)0))
763 hostlen = IA5_OFFSET_LEN(uri, hostptr)((uri)->length - ((unsigned char *)(hostptr) - (uri)->data
));
764 else
765 hostlen = p - hostptr;
766
767 if (hostlen == 0)
768 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
769
770 /* Special case: initial '.' is RHS match */
771 if (base->length > 0 && *baseptr == '.') {
772 if (hostlen > base->length) {
773 p = hostptr + hostlen - base->length;
774 if (ia5ncasecmp(p, baseptr, base->length) == 0)
775 return X509_V_OK0;
776 }
777 return X509_V_ERR_PERMITTED_VIOLATION47;
778 }
779
780 if ((base->length != (int)hostlen)
781 || ia5ncasecmp(hostptr, baseptr, hostlen))
782 return X509_V_ERR_PERMITTED_VIOLATION47;
783
784 return X509_V_OK0;
785
786}
787
788static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base)
789{
790 int hostlen, baselen, i;
791 unsigned char *hostptr, *baseptr, *maskptr;
792 hostptr = ip->data;
793 hostlen = ip->length;
794 baseptr = base->data;
795 baselen = base->length;
796
797 /* Invalid if not IPv4 or IPv6 */
798 if (!((hostlen == 4) || (hostlen == 16)))
799 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
800 if (!((baselen == 8) || (baselen == 32)))
801 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX53;
802
803 /* Do not match IPv4 with IPv6 */
804 if (hostlen * 2 != baselen)
805 return X509_V_ERR_PERMITTED_VIOLATION47;
806
807 maskptr = base->data + hostlen;
808
809 /* Considering possible not aligned base ipAddress */
810 /* Not checking for wrong mask definition: i.e.: 255.0.255.0 */
811 for (i = 0; i < hostlen; i++)
812 if ((hostptr[i] & maskptr[i]) != (baseptr[i] & maskptr[i]))
813 return X509_V_ERR_PERMITTED_VIOLATION47;
814
815 return X509_V_OK0;
816
817}