[openssl-users] It reported verify error:num=20:unable to get local issuer certificate in my embedded linux device, when I used the openssl command

[杨俊]

Hi openssl-er,

> Does cacert.pem contain the CA certificate that issued the certificate for
> https://curl.haxx.se ?

I think the cacert.pem is right. Because, I can get the ok result in my PC
by this command:

​
> If your embedded file system does not support symlinks, you can instead
> rename the PEM files to the names of the symlinks that c_rehash generates
> on a more full-blown development computer.

I don't know if my way is right. I do it like this:


1. In my device, I can't use the c_rehash. It said no perl. I input the
command like this:
/tmp # ./openssl x509 -hash -fingerprint -noout -in
/home/georgeyang/workspace/s
peech_code/openssl/openssl/final/certs/cacert-2016-11-02.pem
5ad8a5d6
SHA1 Fingerprint=B1:BC:96:8B:D4:F4:9D:62:2A:A8:9A:81:F2:15:01:52:A4:1D:82:9C

2. input command:
/etc/ssl/certs # ln -s
/home/georgeyang/workspace/speech_code/openssl/openssl/final/certs/cacert-2016-11-02.pem
5ad8a5d6.0
/etc/ssl/certs # ls -l
total 511
lrwxrwxrwx    1 root     root            88 Jan  1 06:53 5ad8a5d6.0 ->
/home/georgeyang/workspace/speech_code/openssl/openssl/final/certs/cacert-2016-11-02.pem

Is this right?

3. the result is still NG
/tmp # ./openssl s_client -connect curl.haxx.se:443 -CApath /etc/ssl/certs/
CONNECTED(00000003)
depth=0 CN = anja.haxx.se
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 CN = anja.haxx.se
verify error:num=21:unable to verify the first certificate
verify return:1
---

4. NG again
CONNECTED(00000003)
depth=0 CN = anja.haxx.se
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 CN = anja.haxx.se
verify error:num=21:unable to verify the first certificate
verify return:1
---
Certificate chain
 0 s:/CN=anja.haxx.se
   i:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
 1 s:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
   i:/O=Digital Signature Trust Co./CN=DST Root CA X3
---
Server certificate
-----BEGIN CERTIFICATE-----
---
-----END CERTIFICATE-----
subject=/CN=anja.haxx.se
issuer=/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 3143 bytes and written 302 bytes
Verification error: unable to verify the first certificate
---
New, TLSv1.2, Cipher is ECDHE-RSA-AES128-GCM-SHA256
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-RSA-AES128-GCM-SHA256
    Session-ID:
3EA8329E6101B72FDA48B82E57049D637925CBC73064598B5B418270FFA5907C
    Session-ID-ctx:
    Master-Key:
61172C067AE0758A1BE71C7577B6A6E8EFD896516F602BCA30E4E369B61A4093702406403CF41FF3B9CFC2E9E76BE611
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    TLS session ticket lifetime hint: 300 (seconds)
    TLS session ticket:
---

    Start Time: 24915
    Timeout   : 7200 (sec)
    Verify return code: 21 (unable to verify the first certificate)
    Extended master secret: no
---
closed

Thank you :-(
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