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/* ISC license. */
#include <sys/uio.h>
#include <errno.h>
#include <bearssl.h>
#include <skalibs/error.h>
#include <skalibs/buffer.h>
#include <skalibs/stralloc.h>
#include <skalibs/genalloc.h>
#include <s6-networking/sbearssl.h>
#include "sbearssl-internal.h"
int sbearssl_pem_decode_from_buffer (buffer *b, genalloc *list, stralloc *sa)
{
br_pem_decoder_context ctx ;
sbearssl_pemobject po ;
sbearssl_strallocerr blah = { .sa = sa, .err = 0 } ;
size_t listbase = genalloc_len(sbearssl_pemobject, list) ;
size_t sabase = sa->len ;
int listwasnull = !genalloc_s(sbearssl_pemobject, list) ;
int sawasnull = !sa->s ;
int inobj = 0 ;
int r = -1 ;
br_pem_decoder_init(&ctx) ;
for (;;)
{
struct iovec v[2] ;
ssize_t rr = buffer_fill(b) ;
if (rr < 0) goto rfail ;
if (!rr) break ;
buffer_rpeek(b, v) ;
r = sbearssl_pem_push(&ctx, v[0].iov_base, v[0].iov_len, &po, list, &blah, &inobj) ;
if (r) goto fail ;
if (v[1].iov_len)
{
r = sbearssl_pem_push(&ctx, v[1].iov_base, v[1].iov_len, &po, list, &blah, &inobj) ;
if (r) goto fail ;
}
buffer_rseek(b, v[0].iov_len + v[1].iov_len) ;
}
if (!inobj) return 0 ;
errno = EPROTO ;
rfail:
r = -1 ;
fail:
if (listwasnull) genalloc_free(sbearssl_pemobject, list) ;
else genalloc_setlen(sbearssl_pemobject, list, listbase) ;
if (sawasnull) stralloc_free(sa) ;
else sa->len = sabase ;
return r ;
}
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