带有 ECDSA 证书的 TLS握手失败，因为没有共享密码

如何解决带有 ECDSA 证书的 TLS握手失败，因为没有共享密码

我一直在使用自生成的 RSA 证书颁发机构来签署我的服务器证书，到目前为止一切正常。

遵循相同的模式，我尝试使用 ECDSA 签名，假设较小的密钥大小可能会使 IOT 设备更容易。 不幸的是，我无法获得“工作”证书..

使用 openssl（OpenSSL 1.1.0l 2019 年 9 月 10 日）测试证书时，我收到一条错误消息（在服务器上）说“tls_post_process_client_hello:no shared cipher”

服务器端：

openssl s_server -accept 1443 -www -key ec_server_key.pem -cert ec_server_cert.pem 
Using default temp DH parameters
ACCEPT
140203753312320:error:1417A0C1:SSL routines:tls_post_process_client_hello:no shared cipher:../ssl/statem/statem_srvr.c:1419:

客户端：

openssl s_client -showcerts -connect localhost:1443 -CAfile ec_ca.pem 
CONNECTED(00000003)
139868026671168:error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure:../ssl/record/rec_layer_s3.c:1407:SSL alert number 40
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 7 bytes and written 176 bytes
Verification: OK
---
New,(NONE),Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : 0000
    Session-ID: 
    Session-ID-ctx: 
    Master-Key: 
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1618487596
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
    Extended master secret: no
---

使用 RSA 签名一切正常

这就是我使用 RSA 生成证书的方式

#!/bin/bash
# CERTIFICATE AUTHORITY
# generate CA private key
openssl genrsa -aes256 -passout pass:password -out rsa_ca_key.pem 4096
# generate CA public key
openssl req -new -x509 -sha256 -passin pass:password -days 365 -subj "/C=CO/ST=State/L=City/O=Organization/CN=AuthorityName" -key rsa_ca_key.pem -out rsa_ca.pem

# FOR EACH SERVER
# generate server private key
openssl genrsa -out rsa_server_key.pem 4096
# generate server certificate
openssl req -new -sha256 -subj "/CN=server_name" -key rsa_server_key.pem -out rsa_server.csr
# generate extension
echo subjectAltName = DNS:server_domain,IP:10.10.10.20,IP:127.0.0.1 > extfile.cnf
# sign the server certificate
openssl x509 -req -sha256 -days 365 -in rsa_server.csr -CA rsa_ca.pem -CAkey rsa_ca_key.pem -CAcreateserial -out rsa_server_cert.pem -extfile extfile.cnf -passin pass:password
# clean up
rm extfile.cnf rsa_server.csr

这就是我使用 ECDSA 生成证书的方式

#!/bin/bash
# CERTIFICATE AUTHORITY
# generate CA private key
openssl ecparam -genkey -name secp256k1 -param_enc explicit | openssl ec -aes256 -passout pass:password -out ec_ca_key.pem
# generate CA public key
openssl req -new -x509 -sha256 -passin pass:password -days 365 -subj "/C=CO/ST=State/L=City/O=Organization/CN=AuthorityName" -key ec_ca_key.pem -out ec_ca.pem

# FOR EACH SERVER
# generate server private key
openssl ecparam -name secp256k1 -genkey -param_enc explicit -out ec_server_key.pem
# generate server certificate
openssl req -new -sha256 -subj "/CN=server_name" -key ec_server_key.pem -out ec_server.csr
# generate extension
echo subjectAltName = DNS:server_domain,IP:127.0.0.1 > extfile.cnf
# sign the server certificate
openssl x509 -req -sha256 -days 365 -in ec_server.csr -CA ec_ca.pem -CAkey ec_ca_key.pem -CAcreateserial -out ec_server_cert.pem -extfile extfile.cnf -passin pass:password
# clean up
rm extfile.cnf ec_server.csr

解决方法

请在服务器端和客户端添加TLS版本和专用曲线，如下所示。

1. openssl s_server -accept 1443 -www -key ec_server_key.pem -cert ec_server_cert.pem -tls1_2 -curves secp256k1
2. openssl s_client -showcerts -connect localhost:1443 -CAfile ec_ca.pem -tls1_2 -curves secp256k1