hashicorp/vagrant · error · Net::SSH::Exception

curve name mismatched (`#{curve_name_in_key}' with `#{curve_

Error message

curve name mismatched (`#{curve_name_in_key}' with `#{curve_name_in_type}')

What it means

Error "curve name mismatched (`#{curve_name_in_key}' with `#{curve_name_in_type}')" thrown in hashicorp/vagrant.

Source

Thrown at lib/vagrant/patches/net-ssh.rb:20

# SPDX-License-Identifier: BUSL-1.1

require "net/ssh"
require "net/ssh/buffer"

# Set the version requirement for when net-ssh should be patched
NET_SSH_PATCH_REQUIREMENT = Gem::Requirement.new(">= 7.0.0", "<= 7.3")

# This patch provides support for properly loading ECDSA private keys
if NET_SSH_PATCH_REQUIREMENT.satisfied_by?(Gem::Version.new(Net::SSH::Version::STRING))
  Net::SSH::Buffer.class_eval do
    def vagrant_read_private_keyblob(type)
      case type
      when /^ecdsa\-sha2\-(\w*)$/
        curve_name_in_type = $1
        curve_name_in_key = read_string

        unless curve_name_in_type == curve_name_in_key
          raise Net::SSH::Exception, "curve name mismatched (`#{curve_name_in_key}' with `#{curve_name_in_type}')"
        end

        public_key_oct = read_string
        priv_key_bignum = read_bignum
        begin
          curvename = OpenSSL::PKey::EC::CurveNameAlias[curve_name_in_key]
          group = OpenSSL::PKey::EC::Group.new(curvename)
          point = OpenSSL::PKey::EC::Point.new(group, OpenSSL::BN.new(public_key_oct, 2))
          priv_bn = OpenSSL::BN.new(priv_key_bignum, 2)
          asn1 = OpenSSL::ASN1::Sequence(
            [
              OpenSSL::ASN1::Integer.new(OpenSSL::BN.new(0)),
              OpenSSL::ASN1::Sequence.new(
                [
                  OpenSSL::ASN1::ObjectId("id-ecPublicKey"),
                  OpenSSL::ASN1::ObjectId(curvename)
                ]
              ),

View on GitHub (pinned to 35f3160f4a)

When it happens

Trigger: Thrown at lib/vagrant/patches/net-ssh.rb:20 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hashicorp/vagrant@35f3160f4a (2026-08-21). Data as JSON: /api/errors/8f56aa1933c5c051. Report an issue: GitHub.