mirror of
https://github.com/openssl/openssl.git
synced 2024-12-09 05:51:54 +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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| .. | ||
| __DECC_INCLUDE_EPILOGUE.H | ||
| __DECC_INCLUDE_PROLOGUE.H | ||
| bio.h | ||
| comp.h | ||
| conf.h | ||
| constant_time.h | ||
| core.h | ||
| cryptlib.h | ||
| dane.h | ||
| deprecated.h | ||
| der.h | ||
| dso.h | ||
| dsoerr.h | ||
| err.h | ||
| ffc.h | ||
| ktls.h | ||
| namemap.h | ||
| nelem.h | ||
| numbers.h | ||
| o_dir.h | ||
| packet.h | ||
| param_build_set.h | ||
| property.h | ||
| propertyerr.h | ||
| provider.h | ||
| refcount.h | ||
| sha3.h | ||
| sizes.h | ||
| sm3.h | ||
| sockets.h | ||
| sslconf.h | ||
| symhacks.h | ||
| thread_once.h | ||
| tsan_assist.h | ||