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Title "X509_GET_PUBKEY 3ossl" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
X509_get_pubkey, X509_get0_pubkey, X509_set_pubkey, X509_get_X509_PUBKEY, X509_REQ_get_pubkey, X509_REQ_get0_pubkey, X509_REQ_set_pubkey, X509_REQ_get_X509_PUBKEY - get or set certificate or certificate request public key Header "SYNOPSIS" .Vb 1 #include <openssl/x509.h> \& EVP_PKEY *X509_get_pubkey(X509 *x); EVP_PKEY *X509_get0_pubkey(const X509 *x); int X509_set_pubkey(X509 *x, EVP_PKEY *pkey); X509_PUBKEY *X509_get_X509_PUBKEY(const X509 *x); \& EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req); EVP_PKEY *X509_REQ_get0_pubkey(X509_REQ *req); int X509_REQ_set_pubkey(X509_REQ *x, EVP_PKEY *pkey); X509_PUBKEY *X509_REQ_get_X509_PUBKEY(X509_REQ *x); .Ve Header "DESCRIPTION" \fBX509_get_pubkey() attempts to decode the public key for certificate x. If successful it returns the public key as an \s-1EVP_PKEY\s0 pointer with its reference count incremented: this means the returned key must be freed up after use. X509_get0_pubkey() is similar except it does not increment the reference count of the returned \s-1EVP_PKEY\s0 so it must not be freed up after use.

\fBX509_get_X509_PUBKEY() returns an internal pointer to the X509_PUBKEY structure which encodes the certificate of x. The returned value must not be freed up after use.

\fBX509_set_pubkey() attempts to set the public key for certificate x to \fBpkey. The key pkey should be freed up after use.

\fBX509_REQ_get_pubkey(), X509_REQ_get0_pubkey(), X509_REQ_set_pubkey() and \fBX509_REQ_get_X509_PUBKEY() are similar but operate on certificate request req.

Header "NOTES" The first time a public key is decoded the \s-1EVP_PKEY\s0 structure is cached in the certificate or certificate request itself. Subsequent calls return the cached structure with its reference count incremented to improve performance. Header "RETURN VALUES" \fBX509_get_pubkey(), X509_get0_pubkey(), X509_get_X509_PUBKEY(), \fBX509_REQ_get_pubkey() and X509_REQ_get_X509_PUBKEY() return a public key or \fB\s-1NULL\s0 if an error occurred.

\fBX509_set_pubkey() and X509_REQ_set_pubkey() return 1 for success and 0 for failure.

Header "SEE ALSO" \fBd2i_X509\|(3), \fBERR_get_error\|(3), \fBX509_CRL_get0_by_serial\|(3), \fBX509_get0_signature\|(3), \fBX509_get_ext_d2i\|(3), \fBX509_get_extension_flags\|(3), \fBX509_get_subject_name\|(3), \fBX509_get_version\|(3), \fBX509_NAME_add_entry_by_txt\|(3), \fBX509_NAME_ENTRY_get_object\|(3), \fBX509_NAME_get_index_by_NID\|(3), \fBX509_NAME_print_ex\|(3), \fBX509_new\|(3), \fBX509_sign\|(3), \fBX509V3_get_d2i\|(3), \fBX509_verify_cert\|(3) Header "COPYRIGHT" Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.