mirror of
https://github.com/openssl/openssl.git
synced 2025-01-18 13:44:20 +08:00
1d39620b34
This library is meant to be small and quick. It's based on WPACKET,
which was extended to support DER writing. The way it's used is a
bit unusual, as it's used to write the structures backward into a
given buffer. A typical quick call looks like this:
/*
* Fill in this structure:
*
* something ::= SEQUENCE {
* id OBJECT IDENTIFIER,
* x [0] INTEGER OPTIONAL,
* y [1] BOOLEAN OPTIONAL,
* n INTEGER
* }
*/
unsigned char buf[nnnn], *p = NULL;
size_t encoded_len = 0;
WPACKET pkt;
int ok;
ok = WPACKET_init_der(&pkt, buf, sizeof(buf)
&& DER_w_start_sequence(&pkt, -1)
&& DER_w_bn(&pkt, -1, bn)
&& DER_w_boolean(&pkt, 1, bool)
&& DER_w_precompiled(&pkt, -1, OID, sizeof(OID))
&& DER_w_end_sequence(&pkt, -1)
&& WPACKET_finish(&pkt)
&& WPACKET_get_total_written(&pkt, &encoded_len)
&& (p = WPACKET_get_curr(&pkt)) != NULL;
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11450)
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|---|---|---|
| .. | ||
| cms_add1_signing_cert.pod | ||
| DEFINE_SPARSE_ARRAY_OF.pod | ||
| DER_w_begin_sequence.pod | ||
| DER_w_bn.pod | ||
| DER_w_precompiled.pod | ||
| evp_generic_fetch.pod | ||
| evp_keymgmt_newdata.pod | ||
| evp_keymgmt_util_export_to_provider.pod | ||
| evp_pkey_export_to_provider.pod | ||
| openssl_ctx_get_data.pod | ||
| ossl_algorithm_do_all.pod | ||
| ossl_cmp_asn1_octet_string_set1.pod | ||
| ossl_cmp_certReq_new.pod | ||
| ossl_cmp_ctx_set1_caPubs.pod | ||
| ossl_cmp_hdr_init.pod | ||
| ossl_cmp_mock_srv_new.pod | ||
| ossl_cmp_msg_check_received.pod | ||
| ossl_cmp_msg_create.pod | ||
| ossl_cmp_msg_protect.pod | ||
| ossl_cmp_pkisi_get_status.pod | ||
| ossl_cmp_print_log.pod | ||
| ossl_cmp_sk_X509_add1_cert.pod | ||
| ossl_init_thread_deregister.pod | ||
| ossl_method_construct.pod | ||
| OSSL_METHOD_STORE.pod | ||
| ossl_namemap_new.pod | ||
| ossl_prov_util_nid_to_name.pod | ||
| ossl_provider_add_conf_module.pod | ||
| ossl_provider_new.pod | ||
| rsa_get0_all_params.pod | ||
| s2i_ASN1_UTF8STRING.pod | ||