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Code Issues Releases Activity

avformat/tls_schannel: add option to load server certificate from store

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This commit is contained in:
Timo Rothenpieler
2025-07-03 21:57:53 +02:00
parent 90fa9636ef
commit 9cd86c431b
1 changed files with 40 additions and 7 deletions
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47
libavformat/tls_schannel.c
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@ -502,6 +502,32 @@ end:
return ret;
}
static int tls_cert_from_store(void *logctx, const char *cert_store_name, const char *cert_subj, PCCERT_CONTEXT *crtctx)
{
HCERTSTORE cert_store = NULL;
int ret = 0;
cert_store = CertOpenStore(CERT_STORE_PROV_SYSTEM_A, 0, 0, CERT_SYSTEM_STORE_CURRENT_USER, cert_store_name);
if (!cert_store) {
av_log(logctx, AV_LOG_ERROR, "Opening user cert store %s failed\n", cert_store_name);
ret = AVERROR_EXTERNAL;
goto end;
}
*crtctx = CertFindCertificateInStore(cert_store, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_SUBJECT_STR_A, cert_subj, NULL);
if (!*crtctx) {
av_log(logctx, AV_LOG_ERROR, "Could not find certificate in store\n");
ret = AVERROR_EXTERNAL;
goto end;
}
end:
if (cert_store)
CertCloseStore(cert_store, 0);
return ret;
}
static int tls_load_key_cert(char *key_url, char *cert_url, NCRYPT_KEY_HANDLE *key, PCCERT_CONTEXT *crtctx)
{
AVBPrint key_bp, cert_bp;
@ -561,6 +587,9 @@ typedef struct TLSContext {
const AVClass *class;
TLSShared tls_shared;
char *cert_store_subject;
char *cert_store_name;
CredHandle cred_handle;
TimeStamp cred_timestamp;
@ -1048,21 +1077,20 @@ static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **op
schannel_cred.dwVersion = SCHANNEL_CRED_VERSION;
if (s->listen) {
if (s->key_buf && s->cert_buf) {
if (c->cert_store_name && c->cert_store_subject) {
ret = tls_cert_from_store(h, c->cert_store_name, c->cert_store_subject, &crtctx);
} else if (s->key_buf && s->cert_buf) {
ret = tls_import_key_cert(s->key_buf, s->cert_buf, &key, &crtctx);
if (ret < 0)
goto fail;
} else if (s->key_file && s->cert_file) {
ret = tls_load_key_cert(s->key_file, s->cert_file, &key, &crtctx);
if (ret < 0)
goto fail;
} else {
av_log(h, AV_LOG_VERBOSE, "No server certificate provided, using self-signed\n");
ret = tls_gen_self_signed(&key, &crtctx);
if (ret < 0)
goto fail;
}
if (ret < 0)
goto fail;
schannel_cred.cCreds = 1;
schannel_cred.paCred = &crtctx;
@ -1354,8 +1382,13 @@ static int tls_get_short_seek(URLContext *h)
return ffurl_get_short_seek(s->is_dtls ? s->udp : s->tcp);
}
#define OFFSET(x) offsetof(TLSContext, x)
static const AVOption options[] = {
TLS_COMMON_OPTIONS(TLSContext, tls_shared),
{ "cert_store_subject", "Load certificate (and associated key) from users keystore by subject",
OFFSET(cert_store_subject), AV_OPT_TYPE_STRING, .flags = TLS_OPTFL },
{ "cert_store_name", "Name of the specific cert store to search in (for cert_store_subject)",
OFFSET(cert_store_name), AV_OPT_TYPE_STRING, { .str = "MY" }, .flags = TLS_OPTFL },
{ NULL }
};