1 files changed, 5 insertions, 2 deletions
diff --git a/src/ssl/s3_lib.c b/src/ssl/s3_lib.c
index 617ea6e..5209802 100644
--- a/src/ssl/s3_lib.c
+++ b/src/ssl/s3_lib.c
@@ -335,14 +335,17 @@ int SSL_CTX_set1_tls_channel_id(SSL_CTX *ctx, EVP_PKEY *private_key) {
 }
 
 int SSL_set1_tls_channel_id(SSL *ssl, EVP_PKEY *private_key) {
-  ssl->tlsext_channel_id_enabled = 1;
   if (EVP_PKEY_id(private_key) != EVP_PKEY_EC ||
-      EVP_PKEY_bits(private_key) != 256) {
+      EC_GROUP_get_curve_name(EC_KEY_get0_group(private_key->pkey.ec)) !=
+          NID_X9_62_prime256v1) {
     OPENSSL_PUT_ERROR(SSL, SSL_R_CHANNEL_ID_NOT_P256);
     return 0;
   }
+
   EVP_PKEY_free(ssl->tlsext_channel_id_private);
   ssl->tlsext_channel_id_private = EVP_PKEY_up_ref(private_key);
+  ssl->tlsext_channel_id_enabled = 1;
+
   return 1;
 }