ReadPemFromBioToBuffer slurps the entire BIO in one shot, so iterative
callers like wolfSSL_PEM_read_bio_X509_CRL (and by extension
wolfSSL_X509_load_crl_file's BIO branch) saw EOF after the first block
and silently dropped every CRL after the first in a multi-CRL bundle.
Refactor wolfSSL_PEM_read_bio_X509_CRL to delegate to
wolfSSL_PEM_X509_X509_CRL_X509_PKEY_read_bio, which already reads one
PEM BEGIN/END pair per call and leaves the BIO positioned just past the
END line. Loop over it so we skip past intervening cert/key blocks and
return the next CRL in the stream — matching OpenSSL's
PEM_read_bio_X509_CRL, verified against OpenSSL 3.0.13 with cases
{cert,CRL}, {CRL,cert}, {CRL,cert,CRL}, {key,CRL}, {CRL,key,CRL}: in
each case OpenSSL skips non-CRL blocks until EOF.
When the caller passes a non-NULL `x` whose `*x` is already populated,
free the previous CRL before overwriting the slot — matching the
d2i_X509_CRL reuse contract the old body relied on.
To keep both helpers visible at the new call site, drop their `static`
qualifier (wolfSSL_PEM_X509_X509_CRL_X509_PKEY_read_bio for the per-block
read, wolfSSL_X509_PKEY_free to free defensively-allocated keys parsed
from intervening non-CRL blocks). Their definitions in src/x509.c and
declarations in wolfssl/internal.h are widened from OPENSSL_ALL to
OPENSSL_EXTRA || OPENSSL_ALL so the OPENSSL_EXTRA-only build (which
compiles wolfSSL_PEM_read_bio_X509_CRL) links cleanly. The unrelated
INFO_read_bio / INFO_read_bio_X509_INFO group below them keeps its
OPENSSL_ALL gate because it depends on wolfSSL_X509_INFO_new/free that
are still OPENSSL_ALL-only.
Also register the previously-orphaned test_wolfSSL_X509_load_crl_file
(its slot in TEST_OSSL_X509_LOOKUP_DECLS was a duplicated
test_wolfSSL_X509_LOOKUP_ctrl_hash_dir entry), update its assertion for
crl2.pem (which already contains two CRLs) to expect 2 instead of 1, and
add a multi-CRL bundle case that builds a memory BIO from
crl.pem + server-cert.pem + crl2.pem and asserts that the reader walks
past the cert and returns all 3 CRLs before NULL.
Juliusz Sosinowicz
4a85f00240