X509_LOOKUP(3ssl)

1X509_LOOKUP(3)                      OpenSSL                     X509_LOOKUP(3)
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NAME

6       X509_LOOKUP, X509_LOOKUP_TYPE, X509_LOOKUP_new, X509_LOOKUP_free,
7       X509_LOOKUP_init, X509_LOOKUP_shutdown, X509_LOOKUP_set_method_data,
8       X509_LOOKUP_get_method_data, X509_LOOKUP_ctrl, X509_LOOKUP_load_file,
9       X509_LOOKUP_add_dir, X509_LOOKUP_get_store, X509_LOOKUP_by_subject,
10       X509_LOOKUP_by_issuer_serial, X509_LOOKUP_by_fingerprint,
11       X509_LOOKUP_by_alias - OpenSSL certificate lookup mechanisms
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SYNOPSIS

14        #include <openssl/x509_vfy.h>
15
16        typedef x509_lookup_st X509_LOOKUP;
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18        typedef enum X509_LOOKUP_TYPE;
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20        X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method);
21        int X509_LOOKUP_init(X509_LOOKUP *ctx);
22        int X509_LOOKUP_shutdown(X509_LOOKUP *ctx);
23        void X509_LOOKUP_free(X509_LOOKUP *ctx);
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25        int X509_LOOKUP_set_method_data(X509_LOOKUP *ctx, void *data);
26        void *X509_LOOKUP_get_method_data(const X509_LOOKUP *ctx);
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28        int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
29                             long argl, char **ret);
30        int X509_LOOKUP_load_file(X509_LOOKUP *ctx, char *name, long type);
31        int X509_LOOKUP_add_dir(X509_LOOKUP *ctx, char *name, long type);
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33        X509_STORE *X509_LOOKUP_get_store(const X509_LOOKUP *ctx);
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35        int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
36                                   X509_NAME *name, X509_OBJECT *ret);
37        int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
38                                         X509_NAME *name, ASN1_INTEGER *serial,
39                                         X509_OBJECT *ret);
40        int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
41                                       const unsigned char *bytes, int len,
42                                       X509_OBJECT *ret);
43        int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
44                                 const char *str, int len, X509_OBJECT *ret);
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DESCRIPTION

47       The X509_LOOKUP structure holds the information needed to look up
48       certificates and CRLs according to an associated X509_LOOKUP_METHOD(3).
49       Multiple X509_LOOKUP instances can be added to an X509_STORE(3) to
50       enable lookup in that store.
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52       X509_LOOKUP_new() creates a new X509_LOOKUP using the given lookup
53       method.  It can also be created by calling X509_STORE_add_lookup(3),
54       which will associate an X509_STORE with the lookup mechanism.
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56       X509_LOOKUP_init() initializes the internal state and resources as
57       needed by the given X509_LOOKUP to do its work.
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59       X509_LOOKUP_shutdown() tears down the internal state and resources of
60       the given X509_LOOKUP.
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62       X509_LOOKUP_free() destructs the given X509_LOOKUP.
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64       X509_LOOKUP_set_method_data() associates a pointer to application data
65       to the given X509_LOOKUP.
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67       X509_LOOKUP_get_method_data() retrieves a pointer to application data
68       from the given X509_LOOKUP.
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70       X509_LOOKUP_ctrl() is used to set or get additional data to or from an
71       X509_LOOKUP structure or its associated X509_LOOKUP_METHOD(3).  The
72       arguments of the control command are passed via argc and argl, its
73       return value via *ret.  The meaning of the arguments depends on the cmd
74       number of the control command. In general, this function is not called
75       directly, but wrapped by a macro call, see below.  The control cmds
76       known to OpenSSL are discussed in more depth in "Control Commands".
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78       X509_LOOKUP_load_file() passes a filename to be loaded immediately into
79       the associated X509_STORE.  type indicates what type of object is
80       expected.  This can only be used with a lookup using the implementation
81       X509_LOOKUP_file(3).
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83       X509_LOOKUP_add_dir() passes a directory specification from which
84       certificates and CRLs are loaded on demand into the associated
85       X509_STORE.  type indicates what type of object is expected.  This can
86       only be used with a lookup using the implementation
87       X509_LOOKUP_hash_dir(3).
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89       X509_LOOKUP_load_file(), X509_LOOKUP_add_dir(),
90       X509_LOOKUP_add_store(), and X509_LOOKUP_load_store() are implemented
91       as macros that use X509_LOOKUP_ctrl().
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93       X509_LOOKUP_by_subject(), X509_LOOKUP_by_issuer_serial(),
94       X509_LOOKUP_by_fingerprint(), and X509_LOOKUP_by_alias() look up
95       certificates and CRLs in the X509_STORE(3) associated with the
96       X509_LOOKUP using different criteria, where the looked up object is
97       stored in ret.  Some of the underlying X509_LOOKUP_METHODs will also
98       cache objects matching the criteria in the associated X509_STORE, which
99       makes it possible to handle cases where the criteria have more than one
100       hit.
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102   File Types
103       X509_LOOKUP_load_file() and X509_LOOKUP_add_dir() take a type, which
104       can be one of the following:
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106       X509_FILETYPE_PEM
107           The file or files that are loaded are expected to be in PEM format.
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109       X509_FILETYPE_ASN1
110           The file or files that are loaded are expected to be in raw DER
111           format.
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113       X509_FILETYPE_DEFAULT
114           The default certificate file or directory is used.  In this case,
115           name is ignored.
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117   Control Commands
118       The X509_LOOKUP_METHODs built into OpenSSL recognise the following
119       X509_LOOKUP_ctrl() cmds:
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121       X509_L_FILE_LOAD
122           This is the command that X509_LOOKUP_load_file() uses.  The
123           filename is passed in argc, and the type in argl.
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125       X509_L_ADD_DIR
126           This is the command that X509_LOOKUP_add_dir() uses.  The directory
127           specification is passed in argc, and the type in argl.
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129       X509_L_ADD_STORE
130           This is the command that X509_LOOKUP_add_store() uses.  The URI is
131           passed in argc.
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133       X509_L_LOAD_STORE
134           This is the command that X509_LOOKUP_load_store() uses.  The URI is
135           passed in argc.
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RETURN VALUES

138       X509_LOOKUP_new() returns an X509_LOOKUP pointer when successful, or
139       NULL on error.
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141       X509_LOOKUP_init() and X509_LOOKUP_shutdown() return 1 on success, or 0
142       on error.
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144       X509_LOOKUP_ctrl() returns -1 if the X509_LOOKUP doesn't have an
145       associated X509_LOOKUP_METHOD, or 1 if the doesn't have a control
146       function.  Otherwise, it returns what the control function in the
147       X509_LOOKUP_METHOD returns, which is usually 1 on success and 0 in
148       error.
149
150       X509_LOOKUP_get_store() returns an X509_STORE pointer if there is one,
151       otherwise NULL.
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153       X509_LOOKUP_by_subject(), X509_LOOKUP_by_issuer_serial(),
154       X509_LOOKUP_by_fingerprint(), and X509_LOOKUP_by_alias() all return 0
155       if there is no X509_LOOKUP_METHOD or that method doesn't implement the
156       corresponding function.  Otherwise, it returns what the corresponding
157       function in the X509_LOOKUP_METHOD returns, which is usually 1 on
158       success and 0 in error.
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COPYRIGHT

164       Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
165
166       Licensed under the Apache License 2.0 (the "License").  You may not use
167       this file except in compliance with the License.  You can obtain a copy
168       in the file LICENSE in the source distribution or at
169       <https://www.openssl.org/source/license.html>.
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1731.1.1q                            2023-07-20                    X509_LOOKUP(3)

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUES

SEE ALSO

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