371 lines
15 KiB
Plaintext
371 lines
15 KiB
Plaintext
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.\" ========================================================================
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.\"
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.IX Title "X509_LOOKUP 3ossl"
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.TH X509_LOOKUP 3ossl "2024-01-30" "3.2.1" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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X509_LOOKUP, X509_LOOKUP_TYPE,
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X509_LOOKUP_new, X509_LOOKUP_free, X509_LOOKUP_init,
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X509_LOOKUP_shutdown,
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X509_LOOKUP_set_method_data, X509_LOOKUP_get_method_data,
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X509_LOOKUP_ctrl_ex, X509_LOOKUP_ctrl,
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X509_LOOKUP_load_file_ex, X509_LOOKUP_load_file,
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X509_LOOKUP_add_dir,
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X509_LOOKUP_add_store_ex, X509_LOOKUP_add_store,
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X509_LOOKUP_load_store_ex, X509_LOOKUP_load_store,
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X509_LOOKUP_get_store,
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X509_LOOKUP_by_subject_ex, X509_LOOKUP_by_subject,
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X509_LOOKUP_by_issuer_serial, X509_LOOKUP_by_fingerprint,
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X509_LOOKUP_by_alias
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\&\- OpenSSL certificate lookup mechanisms
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/x509_vfy.h>
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\&
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\& typedef x509_lookup_st X509_LOOKUP;
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\&
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\& typedef enum X509_LOOKUP_TYPE;
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\&
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\& X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method);
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\& int X509_LOOKUP_init(X509_LOOKUP *ctx);
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\& int X509_LOOKUP_shutdown(X509_LOOKUP *ctx);
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\& void X509_LOOKUP_free(X509_LOOKUP *ctx);
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\&
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\& int X509_LOOKUP_set_method_data(X509_LOOKUP *ctx, void *data);
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\& void *X509_LOOKUP_get_method_data(const X509_LOOKUP *ctx);
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\&
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\& int X509_LOOKUP_ctrl_ex(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
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\& char **ret, OSSL_LIB_CTX *libctx, const char *propq);
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\& int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
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\& long argl, char **ret);
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\& int X509_LOOKUP_load_file_ex(X509_LOOKUP *ctx, char *name, long type,
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\& OSSL_LIB_CTX *libctx, const char *propq);
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\& int X509_LOOKUP_load_file(X509_LOOKUP *ctx, char *name, long type);
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\& int X509_LOOKUP_load_file_ex(X509_LOOKUP *ctx, char *name, long type,
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\& OSSL_LIB_CTX *libctx, const char *propq);
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\& int X509_LOOKUP_add_dir(X509_LOOKUP *ctx, char *name, long type);
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\& int X509_LOOKUP_add_store_ex(X509_LOOKUP *ctx, char *uri, OSSL_LIB_CTX *libctx,
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\& const char *propq);
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\& int X509_LOOKUP_add_store(X509_LOOKUP *ctx, char *uri);
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\& int X509_LOOKUP_load_store_ex(X509_LOOKUP *ctx, char *uri, OSSL_LIB_CTX *libctx,
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\& const char *propq);
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\& int X509_LOOKUP_load_store(X509_LOOKUP *ctx, char *uri);
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\&
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\& X509_STORE *X509_LOOKUP_get_store(const X509_LOOKUP *ctx);
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\&
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\& int X509_LOOKUP_by_subject_ex(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& const X509_NAME *name, X509_OBJECT *ret,
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\& OSSL_LIB_CTX *libctx, const char *propq);
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\& int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& const X509_NAME *name, X509_OBJECT *ret);
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\& int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& const X509_NAME *name,
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\& const ASN1_INTEGER *serial, X509_OBJECT *ret);
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\& int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& const unsigned char *bytes, int len,
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\& X509_OBJECT *ret);
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\& int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
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\& const char *str, int len, X509_OBJECT *ret);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \fBX509_LOOKUP\fR structure holds the information needed to look up
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certificates and CRLs according to an associated \fIX509_LOOKUP_METHOD\fR\|(3).
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Multiple \fBX509_LOOKUP\fR instances can be added to an \fIX509_STORE\fR\|(3)
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to enable lookup in that store.
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.PP
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\&\fIX509_LOOKUP_new()\fR creates a new \fBX509_LOOKUP\fR using the given lookup
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\&\fImethod\fR.
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It can also be created by calling \fIX509_STORE_add_lookup\fR\|(3), which
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will associate a \fBX509_STORE\fR with the lookup mechanism.
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.PP
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\&\fIX509_LOOKUP_init()\fR initializes the internal state and resources as
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needed by the given \fBX509_LOOKUP\fR to do its work.
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.PP
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\&\fIX509_LOOKUP_shutdown()\fR tears down the internal state and resources of
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the given \fBX509_LOOKUP\fR.
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.PP
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\&\fIX509_LOOKUP_free()\fR destructs the given \fBX509_LOOKUP\fR.
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.PP
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\&\fIX509_LOOKUP_set_method_data()\fR and \fIX509_LOOKUP_get_method_data()\fR
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associates and retrieves a pointer to application data to and from the
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given \fBX509_LOOKUP\fR, respectively.
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.PP
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\&\fIX509_LOOKUP_ctrl_ex()\fR is used to set or get additional data to or from
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a \fBX509_LOOKUP\fR structure using any control function in the
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associated \fIX509_LOOKUP_METHOD\fR\|(3).
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The arguments of the control command are passed via \fIargc\fR and \fIargl\fR,
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its return value via \fI*ret\fR. The library context \fIlibctx\fR and property
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query \fIpropq\fR are used when fetching algorithms from providers.
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The meaning of the arguments depends on the \fIcmd\fR number of the
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control command. In general, this function is not called directly, but
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wrapped by a macro call, see below.
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The control \fIcmd\fRs known to OpenSSL are discussed in more depth
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in \*(L"Control Commands\*(R".
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.PP
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\&\fIX509_LOOKUP_ctrl()\fR is similar to \fIX509_LOOKUP_ctrl_ex()\fR but
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uses \s-1NULL\s0 for the library context \fIlibctx\fR and property query \fIpropq\fR.
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.PP
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\&\fIX509_LOOKUP_load_file_ex()\fR passes a filename to be loaded immediately
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into the associated \fBX509_STORE\fR. The library context \fIlibctx\fR and property
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query \fIpropq\fR are used when fetching algorithms from providers.
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\&\fItype\fR indicates what type of object is expected.
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This can only be used with a lookup using the implementation
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\&\fIX509_LOOKUP_file\fR\|(3).
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.PP
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\&\fIX509_LOOKUP_load_file()\fR is similar to \fIX509_LOOKUP_load_file_ex()\fR but
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uses \s-1NULL\s0 for the library context \fIlibctx\fR and property query \fIpropq\fR.
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.PP
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\&\fIX509_LOOKUP_add_dir()\fR passes a directory specification from which
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certificates and CRLs are loaded on demand into the associated
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\&\fBX509_STORE\fR.
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\&\fItype\fR indicates what type of object is expected.
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This can only be used with a lookup using the implementation
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\&\fIX509_LOOKUP_hash_dir\fR\|(3).
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.PP
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\&\fIX509_LOOKUP_add_store_ex()\fR passes a \s-1URI\s0 for a directory-like structure
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from which containers with certificates and CRLs are loaded on demand
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into the associated \fBX509_STORE\fR. The library context \fIlibctx\fR and property
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query \fIpropq\fR are used when fetching algorithms from providers.
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.PP
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\&\fIX509_LOOKUP_add_store()\fR is similar to \fIX509_LOOKUP_add_store_ex()\fR but
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uses \s-1NULL\s0 for the library context \fIlibctx\fR and property query \fIpropq\fR.
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.PP
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\&\fIX509_LOOKUP_load_store_ex()\fR passes a \s-1URI\s0 for a single container from
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which certificates and CRLs are immediately loaded into the associated
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\&\fBX509_STORE\fR. The library context \fIlibctx\fR and property query \fIpropq\fR are used
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when fetching algorithms from providers.
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These functions can only be used with a lookup using the
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implementation \fIX509_LOOKUP_store\fR\|(3).
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.PP
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\&\fIX509_LOOKUP_load_store()\fR is similar to \fIX509_LOOKUP_load_store_ex()\fR but
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uses \s-1NULL\s0 for the library context \fIlibctx\fR and property query \fIpropq\fR.
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.PP
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\&\fIX509_LOOKUP_load_file_ex()\fR, \fIX509_LOOKUP_load_file()\fR,
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\&\fIX509_LOOKUP_add_dir()\fR,
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\&\fIX509_LOOKUP_add_store_ex()\fR \fIX509_LOOKUP_add_store()\fR,
|
||
|
|
\&\fIX509_LOOKUP_load_store_ex()\fR and \fIX509_LOOKUP_load_store()\fR are
|
||
|
|
implemented as macros that use \fIX509_LOOKUP_ctrl()\fR.
|
||
|
|
.PP
|
||
|
|
\&\fIX509_LOOKUP_by_subject_ex()\fR, \fIX509_LOOKUP_by_subject()\fR,
|
||
|
|
\&\fIX509_LOOKUP_by_issuer_serial()\fR, \fIX509_LOOKUP_by_fingerprint()\fR, and
|
||
|
|
\&\fIX509_LOOKUP_by_alias()\fR look up certificates and CRLs in the \fIX509_STORE\fR\|(3)
|
||
|
|
associated with the \fBX509_LOOKUP\fR using different criteria, where the looked up
|
||
|
|
object is stored in \fIret\fR.
|
||
|
|
Some of the underlying \fBX509_LOOKUP_METHOD\fRs will also cache objects
|
||
|
|
matching the criteria in the associated \fBX509_STORE\fR, which makes it
|
||
|
|
possible to handle cases where the criteria have more than one hit.
|
||
|
|
.SS "Control Commands"
|
||
|
|
.IX Subsection "Control Commands"
|
||
|
|
The \fBX509_LOOKUP_METHOD\fRs built into OpenSSL recognize the following
|
||
|
|
\&\fIX509_LOOKUP_ctrl()\fR \fIcmd\fRs:
|
||
|
|
.IP "\fBX509_L_FILE_LOAD\fR" 4
|
||
|
|
.IX Item "X509_L_FILE_LOAD"
|
||
|
|
This is the command that \fIX509_LOOKUP_load_file_ex()\fR and
|
||
|
|
\&\fIX509_LOOKUP_load_file()\fR use.
|
||
|
|
The filename is passed in \fIargc\fR, and the type in \fIargl\fR.
|
||
|
|
.IP "\fBX509_L_ADD_DIR\fR" 4
|
||
|
|
.IX Item "X509_L_ADD_DIR"
|
||
|
|
This is the command that \fIX509_LOOKUP_add_dir()\fR uses.
|
||
|
|
The directory specification is passed in \fIargc\fR, and the type in
|
||
|
|
\&\fIargl\fR.
|
||
|
|
.IP "\fBX509_L_ADD_STORE\fR" 4
|
||
|
|
.IX Item "X509_L_ADD_STORE"
|
||
|
|
This is the command that \fIX509_LOOKUP_add_store_ex()\fR and
|
||
|
|
\&\fIX509_LOOKUP_add_store()\fR use.
|
||
|
|
The \s-1URI\s0 is passed in \fIargc\fR.
|
||
|
|
.IP "\fBX509_L_LOAD_STORE\fR" 4
|
||
|
|
.IX Item "X509_L_LOAD_STORE"
|
||
|
|
This is the command that \fIX509_LOOKUP_load_store_ex()\fR and
|
||
|
|
\&\fIX509_LOOKUP_load_store()\fR use.
|
||
|
|
The \s-1URI\s0 is passed in \fIargc\fR.
|
||
|
|
.SH "RETURN VALUES"
|
||
|
|
.IX Header "RETURN VALUES"
|
||
|
|
\&\fIX509_LOOKUP_new()\fR returns a \fBX509_LOOKUP\fR pointer when successful,
|
||
|
|
or \s-1NULL\s0 on error.
|
||
|
|
.PP
|
||
|
|
\&\fIX509_LOOKUP_init()\fR and \fIX509_LOOKUP_shutdown()\fR return 1 on success, or
|
||
|
|
0 on error.
|
||
|
|
.PP
|
||
|
|
\&\fIX509_LOOKUP_ctrl_ex()\fR and \fIX509_LOOKUP_ctrl()\fR
|
||
|
|
return \-1 if the \fBX509_LOOKUP\fR doesn't have an
|
||
|
|
associated \fBX509_LOOKUP_METHOD\fR, or 1 if the
|
||
|
|
doesn't have a control function.
|
||
|
|
Otherwise, it returns what the control function in the
|
||
|
|
\&\fBX509_LOOKUP_METHOD\fR returns, which is usually 1 on success and 0 on error
|
||
|
|
but could also be \-1 on failure.
|
||
|
|
.IX Xref "509_LOOKUP_METHOD"
|
||
|
|
.PP
|
||
|
|
\&\fIX509_LOOKUP_get_store()\fR returns a \fBX509_STORE\fR pointer if there is
|
||
|
|
one, otherwise \s-1NULL.\s0
|
||
|
|
.PP
|
||
|
|
\&\fIX509_LOOKUP_by_subject_ex()\fR returns 0 if there is no \fBX509_LOOKUP_METHOD\fR
|
||
|
|
that implements any of the \fIget_by_subject_ex()\fR or \fIget_by_subject()\fR functions.
|
||
|
|
It calls \fIget_by_subject_ex()\fR if present, otherwise \fIget_by_subject()\fR, and returns
|
||
|
|
the result of the function, which is usually 1 on success and 0 on error.
|
||
|
|
.PP
|
||
|
|
\&\fIX509_LOOKUP_by_subject()\fR is similar to \fIX509_LOOKUP_by_subject_ex()\fR
|
||
|
|
but passes \s-1NULL\s0 for both the libctx and propq.
|
||
|
|
.PP
|
||
|
|
\&\fIX509_LOOKUP_by_issuer_serial()\fR, \fIX509_LOOKUP_by_fingerprint()\fR, and
|
||
|
|
\&\fIX509_LOOKUP_by_alias()\fR all return 0 if there is no \fBX509_LOOKUP_METHOD\fR or that
|
||
|
|
method doesn't implement the corresponding function.
|
||
|
|
Otherwise, they return what the corresponding function in the
|
||
|
|
\&\fBX509_LOOKUP_METHOD\fR returns, which is usually 1 on success and 0 in
|
||
|
|
error.
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.IX Header "SEE ALSO"
|
||
|
|
\&\fIX509_LOOKUP_METHOD\fR\|(3), \fIX509_STORE\fR\|(3)
|
||
|
|
.SH "HISTORY"
|
||
|
|
.IX Header "HISTORY"
|
||
|
|
The functions \fIX509_LOOKUP_by_subject_ex()\fR and
|
||
|
|
\&\fIX509_LOOKUP_ctrl_ex()\fR were added in OpenSSL 3.0.
|
||
|
|
.PP
|
||
|
|
The macros \fIX509_LOOKUP_load_file_ex()\fR,
|
||
|
|
\&\fIX509_LOOKUP_load_store_ex()\fR and 509_LOOKUP_add_store_ex() were
|
||
|
|
added in OpenSSL 3.0.
|
||
|
|
.SH "COPYRIGHT"
|
||
|
|
.IX Header "COPYRIGHT"
|
||
|
|
Copyright 2020\-2021 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
|
.PP
|
||
|
|
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>.
|