106 static int asn1_valid_der_boolean(struct asn1_hdr *hdr)  in asn1_valid_der_boolean()  argument
109 	if (hdr->length != 1) {  in asn1_valid_der_boolean()
111 			   hdr->length);  in asn1_valid_der_boolean()
115 	if (hdr->payload[0] != 0 && hdr->payload[0] != 0xff) {  in asn1_valid_der_boolean()
118 			   hdr->payload[0]);  in asn1_valid_der_boolean()
126 static int asn1_valid_der(struct asn1_hdr *hdr)  in asn1_valid_der()  argument
128 	if (hdr->class != ASN1_CLASS_UNIVERSAL)  in asn1_valid_der()
130 	if (hdr->tag == ASN1_TAG_BOOLEAN && !asn1_valid_der_boolean(hdr))  in asn1_valid_der()
132 	if (hdr->tag == ASN1_TAG_NULL && hdr->length != 0)  in asn1_valid_der()
136 	if (hdr->constructed &&  in asn1_valid_der()
137 	    (hdr->tag == ASN1_TAG_BOOLEAN ||  in asn1_valid_der()
138 	     hdr->tag == ASN1_TAG_INTEGER ||  in asn1_valid_der()
139 	     hdr->tag == ASN1_TAG_NULL ||  in asn1_valid_der()
140 	     hdr->tag == ASN1_TAG_OID ||  in asn1_valid_der()
141 	     hdr->tag == ANS1_TAG_RELATIVE_OID ||  in asn1_valid_der()
142 	     hdr->tag == ASN1_TAG_REAL ||  in asn1_valid_der()
143 	     hdr->tag == ASN1_TAG_ENUMERATED ||  in asn1_valid_der()
144 	     hdr->tag == ASN1_TAG_BITSTRING ||  in asn1_valid_der()
145 	     hdr->tag == ASN1_TAG_OCTETSTRING ||  in asn1_valid_der()
146 	     hdr->tag == ASN1_TAG_NUMERICSTRING ||  in asn1_valid_der()
147 	     hdr->tag == ASN1_TAG_PRINTABLESTRING ||  in asn1_valid_der()
148 	     hdr->tag == ASN1_TAG_T61STRING ||  in asn1_valid_der()
149 	     hdr->tag == ASN1_TAG_VIDEOTEXSTRING ||  in asn1_valid_der()
150 	     hdr->tag == ASN1_TAG_VISIBLESTRING ||  in asn1_valid_der()
151 	     hdr->tag == ASN1_TAG_IA5STRING ||  in asn1_valid_der()
152 	     hdr->tag == ASN1_TAG_GRAPHICSTRING ||  in asn1_valid_der()
153 	     hdr->tag == ASN1_TAG_GENERALSTRING ||  in asn1_valid_der()
154 	     hdr->tag == ASN1_TAG_UNIVERSALSTRING ||  in asn1_valid_der()
155 	     hdr->tag == ASN1_TAG_UTF8STRING ||  in asn1_valid_der()
156 	     hdr->tag == ASN1_TAG_BMPSTRING ||  in asn1_valid_der()
157 	     hdr->tag == ASN1_TAG_CHARACTERSTRING ||  in asn1_valid_der()
158 	     hdr->tag == ASN1_TAG_UTCTIME ||  in asn1_valid_der()
159 	     hdr->tag == ASN1_TAG_GENERALIZEDTIME ||  in asn1_valid_der()
160 	     hdr->tag == ASN1_TAG_TIME))  in asn1_valid_der()
162 	if (!hdr->constructed &&  in asn1_valid_der()
163 	    (hdr->tag == ASN1_TAG_SEQUENCE ||  in asn1_valid_der()
164 	     hdr->tag == ASN1_TAG_SET))  in asn1_valid_der()
171 int asn1_get_next(const u8 *buf, size_t len, struct asn1_hdr *hdr)  in asn1_get_next()  argument
176 	os_memset(hdr, 0, sizeof(*hdr));  in asn1_get_next()
184 	hdr->identifier = *pos++;  in asn1_get_next()
185 	hdr->class = hdr->identifier >> 6;  in asn1_get_next()
186 	hdr->constructed = !!(hdr->identifier & (1 << 5));  in asn1_get_next()
188 	if ((hdr->identifier & 0x1f) == 0x1f) {  in asn1_get_next()
191 		hdr->tag = 0;  in asn1_get_next()
207 			hdr->tag = (hdr->tag << 7) | (tmp & 0x7f);  in asn1_get_next()
210 			   hdr->tag, ext_len);  in asn1_get_next()
211 		if ((hdr->class != ASN1_CLASS_PRIVATE && hdr->tag < 31) ||  in asn1_get_next()
212 		    ext_len * 7 > sizeof(hdr->tag) * 8) {  in asn1_get_next()
215 				   hdr->tag, ext_len);  in asn1_get_next()
219 		hdr->tag = hdr->identifier & 0x1f;  in asn1_get_next()
233 		hdr->length = 0;  in asn1_get_next()
249 			hdr->length = (hdr->length << 8) | *pos++;  in asn1_get_next()
251 		if (hdr->length < 128) {  in asn1_get_next()
258 		hdr->length = tmp;  in asn1_get_next()
261 	if (end < pos || hdr->length > (unsigned int) (end - pos)) {  in asn1_get_next()
266 	hdr->payload = pos;  in asn1_get_next()
268 	if (!asn1_valid_der(hdr)) {  in asn1_get_next()
269 		asn1_print_hdr(hdr, "ASN.1: Invalid DER encoding: ");  in asn1_get_next()
276 void asn1_print_hdr(const struct asn1_hdr *hdr, const char *title)  in asn1_print_hdr()  argument
279 		   title, hdr->class, hdr->constructed, hdr->tag);  in asn1_print_hdr()
283 void asn1_unexpected(const struct asn1_hdr *hdr, const char *title)  in asn1_unexpected()  argument
286 		   title, hdr->class, hdr->constructed, hdr->tag);  in asn1_unexpected()
337 	struct asn1_hdr hdr;  in asn1_get_oid()  local
339 	if (asn1_get_next(buf, len, &hdr) < 0 || hdr.length == 0 ||  in asn1_get_oid()
340 	    !asn1_is_oid(&hdr)) {  in asn1_get_oid()
341 		asn1_unexpected(&hdr, "ASN.1: Expected OID");  in asn1_get_oid()
345 	*next = hdr.payload + hdr.length;  in asn1_get_oid()
347 	return asn1_parse_oid(hdr.payload, hdr.length, oid);  in asn1_get_oid()
435 	struct asn1_hdr hdr;  in asn1_get_integer()  local
440 	if (asn1_get_next(buf, len, &hdr) < 0 || hdr.length == 0 ||  in asn1_get_integer()
441 	    !asn1_is_integer(&hdr)) {  in asn1_get_integer()
442 		asn1_unexpected(&hdr, "ASN.1: Expected INTEGER");  in asn1_get_integer()
446 	*next = hdr.payload + hdr.length;  in asn1_get_integer()
447 	pos = hdr.payload;  in asn1_get_integer()
448 	left = hdr.length;  in asn1_get_integer()
451 			   hdr.length);  in asn1_get_integer()
466 int asn1_get_sequence(const u8 *buf, size_t len, struct asn1_hdr *hdr,  in asn1_get_sequence()  argument
469 	if (asn1_get_next(buf, len, hdr) < 0 || !asn1_is_sequence(hdr)) {  in asn1_get_sequence()
470 		asn1_unexpected(hdr, "ASN.1: Expected SEQUENCE");  in asn1_get_sequence()
475 		*next = hdr->payload + hdr->length;  in asn1_get_sequence()
484 	struct asn1_hdr hdr;  in asn1_get_alg_id()  local
491 	if (asn1_get_sequence(pos, end - pos, &hdr, next) < 0 ||  in asn1_get_alg_id()
492 	    asn1_get_oid(hdr.payload, hdr.length, oid, &pos) < 0)  in asn1_get_alg_id()
497 		*params_len = hdr.payload + hdr.length - pos;  in asn1_get_alg_id()