Better error messages if there are no encoders/decoders/store loaders

[thirdparty/openssl.git] / crypto / encode_decode / decoder_lib.c

diff --git a/crypto/encode_decode/decoder_lib.c b/crypto/encode_decode/decoder_lib.c
index 8a5082c441d86ce83d689e384620b03dc3290123..c7eac0eddd6e554d58546d4206d616b93cb075cb 100644 (file)
--- a/crypto/encode_decode/decoder_lib.c
+++ b/crypto/encode_decode/decoder_lib.c
@@ -48,6 +48,14 @@ int OSSL_DECODER_from_bio(OSSL_DECODER_CTX *ctx, BIO *in)
     int ok = 0;
     BIO *new_bio = NULL;
 
+    if (OSSL_DECODER_CTX_get_num_decoders(ctx) == 0) {
+        ERR_raise_data(ERR_LIB_OSSL_DECODER, OSSL_DECODER_R_DECODER_NOT_FOUND,
+                       "No decoders were found. For standard decoders you need "
+                       "at least one of the default or base providers "
+                       "available. Did you forget to load them?");
+        return 0;
+    }
+
     if (BIO_tell(in) < 0) {
         new_bio = BIO_new(BIO_f_readbuffer());
         if (new_bio == NULL)