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allow overriding system trust store location via $NIX_SSL_CERT_FILE
--- a/lib/system/certs.c
+++ b/lib/system/certs.c
@@ -404,6 +404,10 @@ gnutls_x509_trust_list_add_system_trust(gnutls_x509_trust_list_t list,
unsigned int tl_flags,
unsigned int tl_vflags)
{
- return add_system_trust(list, tl_flags | GNUTLS_TL_NO_DUPLICATES,
- tl_vflags);
+ tl_flags = tl_flags|GNUTLS_TL_NO_DUPLICATES;
+ const char *file = secure_getenv("NIX_SSL_CERT_FILE");
+ return file
+ ? gnutls_x509_trust_list_add_trust_file(
+ list, file, NULL/*CRL*/, GNUTLS_X509_FMT_PEM, tl_flags, tl_vflags)
+ : add_system_trust(list, tl_flags, tl_vflags);
}
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