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45ceef14f9
Instead of manually encoding controls, use an actual asn1 compiler. The file asn1/asn1c/ipa.asn1 will contain ipa modules. The generated code is committed to the tree and built into a static library that is linked to the code that uses it. The first module implements the GetKeytabControl control. Related: https://fedorahosted.org/freeipa/ticket/4718 https://fedorahosted.org/freeipa/ticket/4728 Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com> Reviewed-By: Nathaniel McCallum <npmccallum@redhat.com>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
#include <asn_application.h>
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#include <asn_internal.h>
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#include <per_encoder.h>
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/* Flush partially filled buffer */
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static int _uper_encode_flush_outp(asn_per_outp_t *po);
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asn_enc_rval_t
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uper_encode(asn_TYPE_descriptor_t *td, void *sptr, asn_app_consume_bytes_f *cb, void *app_key) {
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asn_per_outp_t po;
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asn_enc_rval_t er;
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/*
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* Invoke type-specific encoder.
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*/
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if(!td || !td->uper_encoder)
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_ASN_ENCODE_FAILED; /* PER is not compiled in */
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po.buffer = po.tmpspace;
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po.nboff = 0;
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po.nbits = 8 * sizeof(po.tmpspace);
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po.outper = cb;
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po.op_key = app_key;
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po.flushed_bytes = 0;
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er = td->uper_encoder(td, 0, sptr, &po);
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if(er.encoded != -1) {
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size_t bits_to_flush;
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bits_to_flush = ((po.buffer - po.tmpspace) << 3) + po.nboff;
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/* Set number of bits encoded to a firm value */
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er.encoded = (po.flushed_bytes << 3) + bits_to_flush;
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if(_uper_encode_flush_outp(&po))
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_ASN_ENCODE_FAILED;
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}
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return er;
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}
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/*
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* Argument type and callback necessary for uper_encode_to_buffer().
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*/
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typedef struct enc_to_buf_arg {
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void *buffer;
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size_t left;
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} enc_to_buf_arg;
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static int encode_to_buffer_cb(const void *buffer, size_t size, void *key) {
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enc_to_buf_arg *arg = (enc_to_buf_arg *)key;
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if(arg->left < size)
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return -1; /* Data exceeds the available buffer size */
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memcpy(arg->buffer, buffer, size);
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arg->buffer = ((char *)arg->buffer) + size;
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arg->left -= size;
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return 0;
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}
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asn_enc_rval_t
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uper_encode_to_buffer(asn_TYPE_descriptor_t *td, void *sptr, void *buffer, size_t buffer_size) {
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enc_to_buf_arg key;
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/*
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* Invoke type-specific encoder.
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*/
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if(!td || !td->uper_encoder)
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_ASN_ENCODE_FAILED; /* PER is not compiled in */
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key.buffer = buffer;
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key.left = buffer_size;
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ASN_DEBUG("Encoding \"%s\" using UNALIGNED PER", td->name);
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return uper_encode(td, sptr, encode_to_buffer_cb, &key);
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}
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static int
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_uper_encode_flush_outp(asn_per_outp_t *po) {
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uint8_t *buf;
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if(po->nboff == 0 && po->buffer == po->tmpspace)
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return 0;
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buf = po->buffer + (po->nboff >> 3);
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/* Make sure we account for the last, partially filled */
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if(po->nboff & 0x07) {
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buf[0] &= 0xff << (8 - (po->nboff & 0x07));
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buf++;
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}
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return po->outper(po->tmpspace, buf - po->tmpspace, po->op_key);
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}
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