crypto/asymmetric_keys/x509_cert_parser.c

64 	struct x509_parse_context *ctx;
78 	ctx = kzalloc(sizeof(struct x509_parse_context), GFP_KERNEL);
79 	if (!ctx)
82 	ctx->cert = cert;
83 	ctx->data = (unsigned long)data;
86 	ret = asn1_ber_decoder(&x509_decoder, ctx, data, datalen);
91 	if (ctx->raw_akid) {
93 			 ctx->raw_akid_size, ctx->raw_akid_size, ctx->raw_akid);
94 		ret = asn1_ber_decoder(&x509_akid_decoder, ctx,
95 				       ctx->raw_akid, ctx->raw_akid_size);
103 	cert->pub->key = kmemdup(ctx->key, ctx->key_size, GFP_KERNEL);
107 	cert->pub->keylen = ctx->key_size;
109 	cert->pub->params = kmemdup(ctx->params, ctx->params_size, GFP_KERNEL);
113 	cert->pub->paramlen = ctx->params_size;
114 	cert->pub->algo = ctx->key_algo;
137 	kfree(ctx);
141 	kfree(ctx);
157 	struct x509_parse_context *ctx = context;
159 	ctx->last_oid = look_up_OID(value, vlen);
160 	if (ctx->last_oid == OID__NR) {
164 			 (unsigned long)value - ctx->data, buffer);
177 	struct x509_parse_context *ctx = context;
180 		 hdrlen, tag, (unsigned long)value - ctx->data, vlen);
182 	ctx->cert->tbs = value - hdrlen;
183 	ctx->cert->tbs_size = vlen + hdrlen;
193 	struct x509_parse_context *ctx = context;
195 	pr_debug("PubKey Algo: %u\n", ctx->last_oid);
197 	switch (ctx->last_oid) {
202 		ctx->cert->sig->hash_algo = "sha1";
206 		ctx->cert->sig->hash_algo = "sha256";
210 		ctx->cert->sig->hash_algo = "sha384";
214 		ctx->cert->sig->hash_algo = "sha512";
218 		ctx->cert->sig->hash_algo = "sha224";
222 		ctx->cert->sig->hash_algo = "sha1";
226 		ctx->cert->sig->hash_algo = "sha3-256";
230 		ctx->cert->sig->hash_algo = "sha3-384";
234 		ctx->cert->sig->hash_algo = "sha3-512";
238 		ctx->cert->sig->hash_algo = "sha224";
242 		ctx->cert->sig->hash_algo = "sha256";
246 		ctx->cert->sig->hash_algo = "sha384";
250 		ctx->cert->sig->hash_algo = "sha512";
254 		ctx->cert->sig->hash_algo = "sha3-256";
258 		ctx->cert->sig->hash_algo = "sha3-384";
262 		ctx->cert->sig->hash_algo = "sha3-512";
266 		ctx->cert->sig->hash_algo = "streebog256";
270 		ctx->cert->sig->hash_algo = "streebog512";
274 		ctx->cert->sig->hash_algo = "sm3";
279 	ctx->cert->sig->pkey_algo = "rsa";
280 	ctx->cert->sig->encoding = "pkcs1";
281 	ctx->sig_algo = ctx->last_oid;
284 	ctx->cert->sig->pkey_algo = "ecrdsa";
285 	ctx->cert->sig->encoding = "raw";
286 	ctx->sig_algo = ctx->last_oid;
289 	ctx->cert->sig->pkey_algo = "sm2";
290 	ctx->cert->sig->encoding = "raw";
291 	ctx->sig_algo = ctx->last_oid;
294 	ctx->cert->sig->pkey_algo = "ecdsa";
295 	ctx->cert->sig->encoding = "x962";
296 	ctx->sig_algo = ctx->last_oid;
307 	struct x509_parse_context *ctx = context;
309 	pr_debug("Signature: alg=%u, size=%zu\n", ctx->last_oid, vlen);
316 	if (ctx->last_oid != ctx->sig_algo) {
318 			ctx->last_oid, ctx->sig_algo);
322 	if (strcmp(ctx->cert->sig->pkey_algo, "rsa") == 0 ||
323 	    strcmp(ctx->cert->sig->pkey_algo, "ecrdsa") == 0 ||
324 	    strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0 ||
325 	    strcmp(ctx->cert->sig->pkey_algo, "ecdsa") == 0) {
334 	ctx->cert->raw_sig = value;
335 	ctx->cert->raw_sig_size = vlen;
346 	struct x509_parse_context *ctx = context;
347 	ctx->cert->raw_serial = value;
348 	ctx->cert->raw_serial_size = vlen;
359 	struct x509_parse_context *ctx = context;
361 	switch (ctx->last_oid) {
363 		ctx->cn_size = vlen;
364 		ctx->cn_offset = (unsigned long)value - ctx->data;
367 		ctx->o_size = vlen;
368 		ctx->o_offset = (unsigned long)value - ctx->data;
371 		ctx->email_size = vlen;
372 		ctx->email_offset = (unsigned long)value - ctx->data;
384 static int x509_fabricate_name(struct x509_parse_context *ctx, size_t hdrlen,
388 	const void *name, *data = (const void *)ctx->data;
396 	if (!ctx->cn_size && !ctx->o_size && !ctx->email_size) {
404 	if (ctx->cn_size && ctx->o_size) {
408 		namesize = ctx->cn_size;
409 		name = data + ctx->cn_offset;
410 		if (ctx->cn_size >= ctx->o_size &&
411 		    memcmp(data + ctx->cn_offset, data + ctx->o_offset,
412 			   ctx->o_size) == 0)
414 		if (ctx->cn_size >= 7 &&
415 		    ctx->o_size >= 7 &&
416 		    memcmp(data + ctx->cn_offset, data + ctx->o_offset, 7) == 0)
419 		buffer = kmalloc(ctx->o_size + 2 + ctx->cn_size + 1,
425 		       data + ctx->o_offset, ctx->o_size);
426 		buffer[ctx->o_size + 0] = ':';
427 		buffer[ctx->o_size + 1] = ' ';
428 		memcpy(buffer + ctx->o_size + 2,
429 		       data + ctx->cn_offset, ctx->cn_size);
430 		buffer[ctx->o_size + 2 + ctx->cn_size] = 0;
433 	} else if (ctx->cn_size) {
434 		namesize = ctx->cn_size;
435 		name = data + ctx->cn_offset;
436 	} else if (ctx->o_size) {
437 		namesize = ctx->o_size;
438 		name = data + ctx->o_offset;
440 		namesize = ctx->email_size;
441 		name = data + ctx->email_offset;
453 	ctx->cn_size = 0;
454 	ctx->o_size = 0;
455 	ctx->email_size = 0;
463 	struct x509_parse_context *ctx = context;
466 	ctx->cert->raw_issuer = value;
467 	ctx->cert->raw_issuer_size = vlen;
469 	if (!ctx->cert->sig->auth_ids[2]) {
473 		ctx->cert->sig->auth_ids[2] = kid;
476 	return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->issuer, vlen);
483 	struct x509_parse_context *ctx = context;
484 	ctx->cert->raw_subject = value;
485 	ctx->cert->raw_subject_size = vlen;
486 	return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->subject, vlen);
496 	struct x509_parse_context *ctx = context;
503 	if (!ctx->cert->raw_subject || ctx->key)
505 	ctx->params = value - hdrlen;
506 	ctx->params_size = vlen + hdrlen;
517 	struct x509_parse_context *ctx = context;
520 	ctx->key_algo = ctx->last_oid;
521 	switch (ctx->last_oid) {
523 		ctx->cert->pub->pkey_algo = "rsa";
527 		ctx->cert->pub->pkey_algo = "ecrdsa";
530 		ctx->cert->pub->pkey_algo = "sm2";
533 		if (parse_OID(ctx->params, ctx->params_size, &oid) != 0)
538 			ctx->cert->pub->pkey_algo = "sm2";
541 			ctx->cert->pub->pkey_algo = "ecdsa-nist-p192";
544 			ctx->cert->pub->pkey_algo = "ecdsa-nist-p256";
547 			ctx->cert->pub->pkey_algo = "ecdsa-nist-p384";
560 	ctx->key = value + 1;
561 	ctx->key_size = vlen - 1;
575 	struct x509_parse_context *ctx = context;
579 	pr_debug("Extension: %u\n", ctx->last_oid);
581 	if (ctx->last_oid == OID_subjectKeyIdentifier) {
583 		if (ctx->cert->skid || vlen < 3)
590 		ctx->cert->raw_skid_size = vlen;
591 		ctx->cert->raw_skid = v;
595 		ctx->cert->skid = kid;
600 	if (ctx->last_oid == OID_keyUsage) {
620 			ctx->cert->pub->key_eflags |= 1 << KEY_EFLAG_DIGITALSIG;
622 			ctx->cert->pub->key_eflags |= 1 << KEY_EFLAG_KEYCERTSIGN;
624 			ctx->cert->pub->key_eflags |= 1 << KEY_EFLAG_KEYCERTSIGN;
628 	if (ctx->last_oid == OID_authorityKeyIdentifier) {
630 		ctx->raw_akid = v;
631 		ctx->raw_akid_size = vlen;
635 	if (ctx->last_oid == OID_basicConstraints) {
653 			ctx->cert->pub->key_eflags |= 1 << KEY_EFLAG_CA;
759 	struct x509_parse_context *ctx = context;
760 	return x509_decode_time(&ctx->cert->valid_from, hdrlen, tag, value, vlen);
767 	struct x509_parse_context *ctx = context;
768 	return x509_decode_time(&ctx->cert->valid_to, hdrlen, tag, value, vlen);
778 	struct x509_parse_context *ctx = context;
783 	if (ctx->cert->sig->auth_ids[1])
790 	ctx->cert->sig->auth_ids[1] = kid;
801 	struct x509_parse_context *ctx = context;
805 	ctx->akid_raw_issuer = value;
806 	ctx->akid_raw_issuer_size = vlen;
817 	struct x509_parse_context *ctx = context;
822 	if (!ctx->akid_raw_issuer || ctx->cert->sig->auth_ids[0])
827 					 ctx->akid_raw_issuer,
828 					 ctx->akid_raw_issuer_size);
833 	ctx->cert->sig->auth_ids[0] = kid;