Ssl Ctx Use Private Key File

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SSL_CTX_use_certificate, SSL_CTX_use_certificate_ASN1, SSL_CTX_use_certificate_file, SSL_use_certificate, SSL_use_certificate_ASN1, SSL_use_certificate_file, SSL_CTX_use_certificate_chain_file, SSL_CTX_use_PrivateKey, SSL_CTX_use_PrivateKey_ASN1, SSL_CTX_use_PrivateKey_file, SSL_CTX_use_RSAPrivateKey, SSL_CTX_use_RSAPrivateKey_ASN1, SSL_CTX_use_RSAPrivateKey_file, SSL_use_PrivateKey_file, SSL_use_PrivateKey_ASN1, SSL_use_PrivateKey, SSL_use_RSAPrivateKey, SSL_use_RSAPrivateKey_ASN1, SSL_use_RSAPrivateKey_file, SSL_CTX_check_private_key, SSL_check_private_key - load certificate and key data
These functions load the certificates and private keys into the SSL_CTX or SSL object, respectively.
The SSL_CTX_* class of functions loads the certificates and keys into the SSL_CTX object ctx. The information is passed to SSL objects ssl created from ctx with ssl_new(3) by copying, so that changes applied to ctx do not propagate to already existing SSL objects.
The SSL_* class of functions only loads certificates and keys into a specific SSL object. The specific information is kept, when ssl_clear(3) is called for this SSL object.
SSL_CTX_use_certificate() loads the certificate x into ctx, SSL_use_certificate() loads x into ssl. The rest of the certificates needed to form the complete certificate chain can be specified using the ssl_ctx_add_extra_chain_cert(3) function.
SSL_CTX_use_certificate_ASN1() loads the ASN1 encoded certificate from the memory location d (with length len) into ctx, SSL_use_certificate_ASN1() loads the ASN1 encoded certificate into ssl.
SSL_CTX_use_certificate_file() loads the first certificate stored in file into ctx. The formatting type of the certificate must be specified from the known types SSL_FILETYPE_PEM , SSL_FILETYPE_ASN1 . SSL_use_certificate_file() loads the certificate from file into ssl. See the NOTES section on why SSL_CTX_use_certificate_chain_file() should be preferred.
SSL_CTX_use_certificate_chain_file() loads a certificate chain from file into ctx. The certificates must be in PEM format and must be sorted starting with the subject's certificate (actual client or server certificate), followed by intermediate CA certificates if applicable, and ending at the highest level (root) CA . There is no corresponding function working on a single SSL object.
SSL_CTX_use_PrivateKey() adds pkey as private key to ctx. SSL_CTX_use_RSAPrivateKey() adds the private key rsa of type RSA to ctx. SSL_use_PrivateKey() adds pkey as private key to ssl; SSL_use_RSAPrivateKey() adds rsa as private key of type RSA to ssl. If a certificate has already been set and the private does not belong to the certificate an error is returned. To change a certificate, private key pair the new certificate needs to be set with SSL_use_certificate() or SSL_CTX_use_certificate() before setting the private key with SSL_CTX_use_PrivateKey() or SSL_use_PrivateKey().
SSL_CTX_use_PrivateKey_ASN1() adds the private key of type pk stored at memory location d (length len) to ctx. SSL_CTX_use_RSAPrivateKey_ASN1() adds the private key of type RSA stored at memory location d (length len) to ctx. SSL_use_PrivateKey_ASN1() and SSL_use_RSAPrivateKey_ASN1() add the private key to ssl.
SSL_CTX_use_PrivateKey_file() adds the first private key found in file to ctx. The formatting type of the certificate must be specified from the known types SSL_FILETYPE_PEM , SSL_FILETYPE_ASN1 . SSL_CTX_use_RSAPrivateKey_file() adds the first private RSA key found in file to ctx. SSL_use_PrivateKey_file() adds the first private key found in file to ssl; SSL_use_RSAPrivateKey_file() adds the first private RSA key found to ssl.
SSL_CTX_check_private_key() checks the consistency of a private key with the corresponding certificate loaded into ctx. If more than one key/certificate pair ( RSA/DSA ) is installed, the last item installed will be checked. If e.g. the last item was a RSA certificate or key, the RSA key/certificate pair will be checked. SSL_check_private_key() performs the same check for ssl. If no key/certificate was explicitly added for this ssl, the last item added into ctx will be checked.
The internal certificate store of OpenSSL can hold two private key/certificate pairs at a time: one key/certificate of type RSA and one key/certificate of type DSA . The certificate used depends on the cipher select, see also ssl_ctx_set_cipher_list(3).
When reading certificates and private keys from file, files of type SSL_FILETYPE_ASN1 (also known as DER , binary encoding) can only contain one certificate or private key, consequently SSL_CTX_use_certificate_chain_file() is only applicable to PEM formatting. Files of type SSL_FILETYPE_PEM can contain more than one item.
SSL_CTX_use_certificate_chain_file() adds the first certificate found in the file to the certificate store. The other certificates are added to the store of chain certificates using ssl_ctx_add_extra_chain_cert(3). There exists only one extra chain store, so that the same chain is appended to both types of certificates, RSA and DSA ! If it is not intended to use both type of certificate at the same time, it is recommended to use the SSL_CTX_use_certificate_chain_file() instead of the SSL_CTX_use_certificate_file() function in order to allow the use of complete certificate chains even when no trusted CA storage is used or when the CA issuing the certificate shall not be added to the trusted CA storage.
If additional certificates are needed to complete the chain during the TLS negotiation, CA certificates are additionally looked up in the locations of trusted CA certificates, see ssl_ctx_load_verify_locations(3).
The private keys loaded from file can be encrypted. In order to successfully load encrypted keys, a function returning the passphrase must have been supplied, see ssl_ctx_set_default_passwd_cb(3). (Certificate files might be encrypted as well from the technical point of view, it however does not make sense as the data in the certificate is considered public anyway.)
On success, the functions return 1. Otherwise check out the error stack to find out the reason.
Support for DER encoded private keys ( SSL_FILETYPE_ASN1 ) in SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file() was added in 0.9.8 .

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I'm writing a client application on Windows that establishes an SSL connection to a server, and the server requests client certificate for authentication. The server provides me a .pfx file, then I use openssl command line tool to get the certificate and the private key like this:
after that, I try to load the certificate and the private key with functions from openssl as below, but SSL_CTX_use_PrivateKey_file() always failed, the error message is "error:0906D06C:PEM routines:PEM_read_bio:no start line", I can't figure it out why, can anyone give me some enlightenment? Here is the code.
jfly
jfly 6,989●33 gold badges●3131 silver badges●6161 bronze badges
In my case the error was because the PEM file did not contain both a key and a certificate.
Make sure your file contains both sections:
I catenated .key and .crt files I already had in my Apache configuration to make a .pem file.
The 'no start line' error is certainly misleading as you can have a perfectly good "BEGIN" line in your PEM file and still get the error.
TheMagicCow
TheMagicCow 366●11 silver badge●99 bronze badges
NodeDad
1,493●11 gold badge●1919 silver badges●4545 bronze badges
The error error:0906D06C:PEM routines:PEM_read_bio:no start line is because in both the cert.pem as well as key.pem, don't start off with -----BEGIN CERTIFICATE----- and -----BEGIN ENCRYPTED PRIVATE KEY-----.
If you open up your cert.pem and key.pem in a text editor and yank off whatever is there before the BEGIN markers, you should be good.
When you create a certificate and a key pair using Certificate Signing Request, you won't get this additional information.
Karthik
Karthik 720●44 silver badges●1010 bronze badges
I've solved this problem myself. I generated the key.pem using OpenSSL for Windows, when the CMD prompts me to type in the pass phrase, I just typed a Enter since I needn't a pass phrase, but the key.pem was invalid(neither BEGIN nor END markers). When I generate the private key in Linux, the terminal prompts I must type a pass phrase and I do. Then I remove the key pass phrase using this command:
openssl rsa -in key.pem -out newkey.pem
After that, I open the key.pem in a text editor, it starts off with -----BEGIN RSA PRIVATE KEY----- and end up with -----END RSA PRIVATE KEY-----. And SSL_CTX_use_PrivateKey_file() just works fine!
jfly
jfly 6,989●33 gold badges●3131 silver badges●6161 bronze badges
Very useful trick for removing the password of a key file. Add to toolbox. – samvv Jun 26 '16 at 11:32
Under openssl directory demo/openssl there is a client example.
Try this example and see where it fails.
Are you sure that the key password is 123456 ?
Cyril
Cyril 61●11 silver badge●66 bronze badges
I don't think it matters. The SSLv2 vs SSLv23 distinction matters only when you make a connection. In the above case, the error is issued before even a connection is made. – Karthik Sep 26 '13 at 17:54
@Cyril No. it's the passphrase that matters. – jfly Sep 27 '13 at 17:01
I had the same problem in NGINX while installing the SSL certificate and I resolved using the following step:
-----BEGIN CERTIFICATE----- MIIE0DCCA7igAwIBAgIBBzANBgkqhkiG9w0BAQsFADCBgzELMAkGA1UEBhMCVVMx EDAOBgNVBAgTB0FyaXpvbmExEzARBgNVBAcTClNjb3R0c2RhbGUxGjAYBgNVBAoT ..........
-----BEGIN CERTIFICATE----- MIIEfTCCA2WgAwIBAgIDG+cVMA0GCSqGSIb3DQEBCwUAMGMxCzAJBgNVBAYTAlVT MSEwHwYDVQQKExhUaGUgR28gRGFkZHkgR3JvdXAsIEluYy4xMTAvBgNVBAsTKEdv ..........
-----BEGIN CERTIFICATE----- MIIEADCCAuigAwIBAgIBADANBgkqhkiG9w0BAQUFADBjMQswCQYDVQQGEwJVUzEh MB8GA1UEChMYVGhlIEdvIERhZGR5IEdyb3VwLCBJbmMuMTEwLwYDVQQLEyhHbyBE .......... -----END CERTIFICATE-----
-----BEGIN CERTIFICATE----- MIIGLzCCBRegAwIBAgIIWI4ndTQi3MwwDQYJKoZIhvcNAQELBQAwgbQxCzAJBgNV MAAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMA4GA1UdDwEB/wQEAwIF oDA4BgNVHR8EMTAvMC2gK6AphidodHRwOi8vY3JsLmdvZGFkZHkuY29tL2dkaWcy
The above steps worked for me in my Nginx and SSL configuration
Ankur Tiwari
Ankur Tiwari 2,647●22 gold badges●1919 silver badges●3939 bronze badges
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