build - Rewire secure, remove conflicts from libmd, libcrypt
[dragonfly.git] / lib / libssl / man / SSL_CTX_use_certificate.3
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133.\" ========================================================================
134.\"
135.IX Title "SSL_CTX_use_certificate 3"
57eefc0b 136.TH SSL_CTX_use_certificate 3 "2016-05-03" "1.0.2h" "OpenSSL"
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137.\" For nroff, turn off justification. Always turn off hyphenation; it makes
138.\" way too many mistakes in technical documents.
139.if n .ad l
140.nh
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141.SH "NAME"
142SSL_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
143.SH "SYNOPSIS"
e056f0e0 144.IX Header "SYNOPSIS"
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145.Vb 1
146\& #include <openssl/ssl.h>
e257b235 147\&
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148\& int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x);
149\& int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, unsigned char *d);
150\& int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type);
151\& int SSL_use_certificate(SSL *ssl, X509 *x);
152\& int SSL_use_certificate_ASN1(SSL *ssl, unsigned char *d, int len);
153\& int SSL_use_certificate_file(SSL *ssl, const char *file, int type);
e257b235 154\&
984263bc 155\& int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file);
e257b235 156\&
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157\& int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);
158\& int SSL_CTX_use_PrivateKey_ASN1(int pk, SSL_CTX *ctx, unsigned char *d,
159\& long len);
160\& int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type);
161\& int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa);
162\& int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, unsigned char *d, long len);
163\& int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type);
164\& int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey);
165\& int SSL_use_PrivateKey_ASN1(int pk,SSL *ssl, unsigned char *d, long len);
166\& int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type);
167\& int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa);
168\& int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, unsigned char *d, long len);
169\& int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type);
e257b235 170\&
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171\& int SSL_CTX_check_private_key(const SSL_CTX *ctx);
172\& int SSL_check_private_key(const SSL *ssl);
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173.Ve
174.SH "DESCRIPTION"
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175.IX Header "DESCRIPTION"
176These functions load the certificates and private keys into the \s-1SSL_CTX\s0
177or \s-1SSL\s0 object, respectively.
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178.PP
179The SSL_CTX_* class of functions loads the certificates and keys into the
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180\&\s-1SSL_CTX\s0 object \fBctx\fR. The information is passed to \s-1SSL\s0 objects \fBssl\fR
181created from \fBctx\fR with \fISSL_new\fR\|(3) by copying, so that
182changes applied to \fBctx\fR do not propagate to already existing \s-1SSL\s0 objects.
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183.PP
184The SSL_* class of functions only loads certificates and keys into a
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185specific \s-1SSL\s0 object. The specific information is kept, when
186\&\fISSL_clear\fR\|(3) is called for this \s-1SSL\s0 object.
984263bc 187.PP
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188\&\fISSL_CTX_use_certificate()\fR loads the certificate \fBx\fR into \fBctx\fR,
189\&\fISSL_use_certificate()\fR loads \fBx\fR into \fBssl\fR. The rest of the
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190certificates needed to form the complete certificate chain can be
191specified using the
e056f0e0 192\&\fISSL_CTX_add_extra_chain_cert\fR\|(3)
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193function.
194.PP
e056f0e0 195\&\fISSL_CTX_use_certificate_ASN1()\fR loads the \s-1ASN1\s0 encoded certificate from
984263bc 196the memory location \fBd\fR (with length \fBlen\fR) into \fBctx\fR,
e056f0e0 197\&\fISSL_use_certificate_ASN1()\fR loads the \s-1ASN1\s0 encoded certificate into \fBssl\fR.
984263bc 198.PP
e056f0e0 199\&\fISSL_CTX_use_certificate_file()\fR loads the first certificate stored in \fBfile\fR
984263bc 200into \fBctx\fR. The formatting \fBtype\fR of the certificate must be specified
5a44c043 201from the known types \s-1SSL_FILETYPE_PEM, SSL_FILETYPE_ASN1.\s0
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202\&\fISSL_use_certificate_file()\fR loads the certificate from \fBfile\fR into \fBssl\fR.
203See the \s-1NOTES\s0 section on why \fISSL_CTX_use_certificate_chain_file()\fR
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204should be preferred.
205.PP
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206\&\fISSL_CTX_use_certificate_chain_file()\fR loads a certificate chain from
207\&\fBfile\fR into \fBctx\fR. The certificates must be in \s-1PEM\s0 format and must
a7d27d5a 208be sorted starting with the subject's certificate (actual client or server
e056f0e0 209certificate), followed by intermediate \s-1CA\s0 certificates if applicable, and
5a44c043 210ending at the highest level (root) \s-1CA.\s0
e056f0e0 211There is no corresponding function working on a single \s-1SSL\s0 object.
984263bc 212.PP
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213\&\fISSL_CTX_use_PrivateKey()\fR adds \fBpkey\fR as private key to \fBctx\fR.
214\&\fISSL_CTX_use_RSAPrivateKey()\fR adds the private key \fBrsa\fR of type \s-1RSA\s0
984263bc 215to \fBctx\fR. \fISSL_use_PrivateKey()\fR adds \fBpkey\fR as private key to \fBssl\fR;
e056f0e0 216\&\fISSL_use_RSAPrivateKey()\fR adds \fBrsa\fR as private key of type \s-1RSA\s0 to \fBssl\fR.
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217If a certificate has already been set and the private does not belong
218to the certificate an error is returned. To change a certificate, private
219key pair the new certificate needs to be set with \fISSL_use_certificate()\fR
220or \fISSL_CTX_use_certificate()\fR before setting the private key with
e257b235 221\&\fISSL_CTX_use_PrivateKey()\fR or \fISSL_use_PrivateKey()\fR.
984263bc 222.PP
e056f0e0 223\&\fISSL_CTX_use_PrivateKey_ASN1()\fR adds the private key of type \fBpk\fR
984263bc 224stored at memory location \fBd\fR (length \fBlen\fR) to \fBctx\fR.
e056f0e0 225\&\fISSL_CTX_use_RSAPrivateKey_ASN1()\fR adds the private key of type \s-1RSA\s0
984263bc 226stored at memory location \fBd\fR (length \fBlen\fR) to \fBctx\fR.
e056f0e0 227\&\fISSL_use_PrivateKey_ASN1()\fR and \fISSL_use_RSAPrivateKey_ASN1()\fR add the private
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228key to \fBssl\fR.
229.PP
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230\&\fISSL_CTX_use_PrivateKey_file()\fR adds the first private key found in
231\&\fBfile\fR to \fBctx\fR. The formatting \fBtype\fR of the certificate must be specified
5a44c043 232from the known types \s-1SSL_FILETYPE_PEM, SSL_FILETYPE_ASN1.\s0
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233\&\fISSL_CTX_use_RSAPrivateKey_file()\fR adds the first private \s-1RSA\s0 key found in
234\&\fBfile\fR to \fBctx\fR. \fISSL_use_PrivateKey_file()\fR adds the first private key found
984263bc 235in \fBfile\fR to \fBssl\fR; \fISSL_use_RSAPrivateKey_file()\fR adds the first private
e056f0e0 236\&\s-1RSA\s0 key found to \fBssl\fR.
984263bc 237.PP
e056f0e0 238\&\fISSL_CTX_check_private_key()\fR checks the consistency of a private key with
984263bc 239the corresponding certificate loaded into \fBctx\fR. If more than one
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240key/certificate pair (\s-1RSA/DSA\s0) is installed, the last item installed will
241be checked. If e.g. the last item was a \s-1RSA\s0 certificate or key, the \s-1RSA\s0
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242key/certificate pair will be checked. \fISSL_check_private_key()\fR performs
243the same check for \fBssl\fR. If no key/certificate was explicitly added for
244this \fBssl\fR, the last item added into \fBctx\fR will be checked.
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245.SH "NOTES"
246.IX Header "NOTES"
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247The internal certificate store of OpenSSL can hold several private
248key/certificate pairs at a time. The certificate used depends on the
249cipher selected, see also \fISSL_CTX_set_cipher_list\fR\|(3).
e056f0e0 250.PP
984263bc 251When reading certificates and private keys from file, files of type
5a44c043 252\&\s-1SSL_FILETYPE_ASN1 \s0(also known as \fB\s-1DER\s0\fR, binary encoding) can only contain
984263bc 253one certificate or private key, consequently
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254\&\fISSL_CTX_use_certificate_chain_file()\fR is only applicable to \s-1PEM\s0 formatting.
255Files of type \s-1SSL_FILETYPE_PEM\s0 can contain more than one item.
984263bc 256.PP
e056f0e0 257\&\fISSL_CTX_use_certificate_chain_file()\fR adds the first certificate found
984263bc 258in the file to the certificate store. The other certificates are added
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259to the store of chain certificates using \fISSL_CTX_add1_chain_cert\fR\|(3). Note: versions of OpenSSL before 1.0.2 only had a single
260certificate chain store for all certificate types, OpenSSL 1.0.2 and later
261have a separate chain store for each type. \fISSL_CTX_use_certificate_chain_file()\fR
262should be used instead of the \fISSL_CTX_use_certificate_file()\fR function in order
263to allow the use of complete certificate chains even when no trusted \s-1CA\s0
264storage is used or when the \s-1CA\s0 issuing the certificate shall not be added to
265the trusted \s-1CA\s0 storage.
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266.PP
267If additional certificates are needed to complete the chain during the
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268\&\s-1TLS\s0 negotiation, \s-1CA\s0 certificates are additionally looked up in the
269locations of trusted \s-1CA\s0 certificates, see
270\&\fISSL_CTX_load_verify_locations\fR\|(3).
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271.PP
272The private keys loaded from file can be encrypted. In order to successfully
273load encrypted keys, a function returning the passphrase must have been
274supplied, see
e056f0e0 275\&\fISSL_CTX_set_default_passwd_cb\fR\|(3).
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276(Certificate files might be encrypted as well from the technical point
277of view, it however does not make sense as the data in the certificate
278is considered public anyway.)
279.SH "RETURN VALUES"
e056f0e0 280.IX Header "RETURN VALUES"
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281On success, the functions return 1.
282Otherwise check out the error stack to find out the reason.
283.SH "SEE ALSO"
a7d27d5a 284.IX Header "SEE ALSO"
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285\&\fIssl\fR\|(3), \fISSL_new\fR\|(3), \fISSL_clear\fR\|(3),
286\&\fISSL_CTX_load_verify_locations\fR\|(3),
287\&\fISSL_CTX_set_default_passwd_cb\fR\|(3),
288\&\fISSL_CTX_set_cipher_list\fR\|(3),
289\&\fISSL_CTX_set_client_cert_cb\fR\|(3),
290\&\fISSL_CTX_add_extra_chain_cert\fR\|(3)
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291.SH "HISTORY"
292.IX Header "HISTORY"
293Support for \s-1DER\s0 encoded private keys (\s-1SSL_FILETYPE_ASN1\s0) in
294\&\fISSL_CTX_use_PrivateKey_file()\fR and \fISSL_use_PrivateKey_file()\fR was added
295in 0.9.8 .