xref: /openssl/crypto/x509/x509_local.h (revision 3c2bdd7d)
1 /*
2  * Copyright 2014-2021 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9 
10 #include "internal/refcount.h"
11 
12 #define X509V3_conf_add_error_name_value(val) \
13     ERR_add_error_data(4, "name=", (val)->name, ", value=", (val)->value)
14 
15 /*
16  * This structure holds all parameters associated with a verify operation by
17  * including an X509_VERIFY_PARAM structure in related structures the
18  * parameters used can be customized
19  */
20 
21 struct X509_VERIFY_PARAM_st {
22     char *name;
23     time_t check_time;          /* Time to use */
24     uint32_t inh_flags;         /* Inheritance flags */
25     unsigned long flags;        /* Various verify flags */
26     int purpose;                /* purpose to check untrusted certificates */
27     int trust;                  /* trust setting to check */
28     int depth;                  /* Verify depth */
29     int auth_level;             /* Security level for chain verification */
30     STACK_OF(ASN1_OBJECT) *policies; /* Permissible policies */
31     /* Peer identity details */
32     STACK_OF(OPENSSL_STRING) *hosts; /* Set of acceptable names */
33     unsigned int hostflags;     /* Flags to control matching features */
34     char *peername;             /* Matching hostname in peer certificate */
35     char *email;                /* If not NULL email address to match */
36     size_t emaillen;
37     unsigned char *ip;          /* If not NULL IP address to match */
38     size_t iplen;               /* Length of IP address */
39 };
40 
41 /* No error callback if depth < 0 */
42 int ossl_x509_check_cert_time(X509_STORE_CTX *ctx, X509 *x, int depth);
43 
44 /* a sequence of these are used */
45 struct x509_attributes_st {
46     ASN1_OBJECT *object;
47     STACK_OF(ASN1_TYPE) *set;
48 };
49 
50 struct X509_extension_st {
51     ASN1_OBJECT *object;
52     ASN1_BOOLEAN critical;
53     ASN1_OCTET_STRING value;
54 };
55 
56 /*
57  * Method to handle CRL access. In general a CRL could be very large (several
58  * Mb) and can consume large amounts of resources if stored in memory by
59  * multiple processes. This method allows general CRL operations to be
60  * redirected to more efficient callbacks: for example a CRL entry database.
61  */
62 
63 #define X509_CRL_METHOD_DYNAMIC         1
64 
65 struct x509_crl_method_st {
66     int flags;
67     int (*crl_init) (X509_CRL *crl);
68     int (*crl_free) (X509_CRL *crl);
69     int (*crl_lookup) (X509_CRL *crl, X509_REVOKED **ret,
70                        const ASN1_INTEGER *ser, const X509_NAME *issuer);
71     int (*crl_verify) (X509_CRL *crl, EVP_PKEY *pk);
72 };
73 
74 struct x509_lookup_method_st {
75     char *name;
76     int (*new_item) (X509_LOOKUP *ctx);
77     void (*free) (X509_LOOKUP *ctx);
78     int (*init) (X509_LOOKUP *ctx);
79     int (*shutdown) (X509_LOOKUP *ctx);
80     int (*ctrl) (X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
81                  char **ret);
82     int (*get_by_subject) (X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
83                            const X509_NAME *name, X509_OBJECT *ret);
84     int (*get_by_issuer_serial) (X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
85                                  const X509_NAME *name,
86                                  const ASN1_INTEGER *serial,
87                                  X509_OBJECT *ret);
88     int (*get_by_fingerprint) (X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
89                                const unsigned char *bytes, int len,
90                                X509_OBJECT *ret);
91     int (*get_by_alias) (X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
92                          const char *str, int len, X509_OBJECT *ret);
93     int (*get_by_subject_ex) (X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
94                               const X509_NAME *name, X509_OBJECT *ret,
95                               OSSL_LIB_CTX *libctx, const char *propq);
96     int (*ctrl_ex) (X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
97                     char **ret, OSSL_LIB_CTX *libctx, const char *propq);
98 };
99 
100 /* This is the functions plus an instance of the local variables. */
101 struct x509_lookup_st {
102     int init;                   /* have we been started */
103     int skip;                   /* don't use us. */
104     X509_LOOKUP_METHOD *method; /* the functions */
105     void *method_data;          /* method data */
106     X509_STORE *store_ctx;      /* who owns us */
107 };
108 
109 /*
110  * This is used to hold everything.  It is used for all certificate
111  * validation.  Once we have a certificate chain, the 'verify' function is
112  * then called to actually check the cert chain.
113  */
114 struct x509_store_st {
115     /* The following is a cache of trusted certs */
116     int cache;                  /* if true, stash any hits */
117     STACK_OF(X509_OBJECT) *objs; /* Cache of all objects */
118     /* These are external lookup methods */
119     STACK_OF(X509_LOOKUP) *get_cert_methods;
120     X509_VERIFY_PARAM *param;
121     /* Callbacks for various operations */
122     /* called to verify a certificate */
123     int (*verify) (X509_STORE_CTX *ctx);
124     /* error callback */
125     int (*verify_cb) (int ok, X509_STORE_CTX *ctx);
126     /* get issuers cert from ctx */
127     int (*get_issuer) (X509 **issuer, X509_STORE_CTX *ctx, X509 *x);
128     /* check issued */
129     int (*check_issued) (X509_STORE_CTX *ctx, X509 *x, X509 *issuer);
130     /* Check revocation status of chain */
131     int (*check_revocation) (X509_STORE_CTX *ctx);
132     /* retrieve CRL */
133     int (*get_crl) (X509_STORE_CTX *ctx, X509_CRL **crl, X509 *x);
134     /* Check CRL validity */
135     int (*check_crl) (X509_STORE_CTX *ctx, X509_CRL *crl);
136     /* Check certificate against CRL */
137     int (*cert_crl) (X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x);
138     /* Check policy status of the chain */
139     int (*check_policy) (X509_STORE_CTX *ctx);
140     STACK_OF(X509) *(*lookup_certs) (X509_STORE_CTX *ctx,
141                                      const X509_NAME *nm);
142     /* cannot constify 'ctx' param due to lookup_certs_sk() in x509_vfy.c */
143     STACK_OF(X509_CRL) *(*lookup_crls) (const X509_STORE_CTX *ctx,
144                                         const X509_NAME *nm);
145     int (*cleanup) (X509_STORE_CTX *ctx);
146     CRYPTO_EX_DATA ex_data;
147     CRYPTO_REF_COUNT references;
148     CRYPTO_RWLOCK *lock;
149 };
150 
151 typedef struct lookup_dir_hashes_st BY_DIR_HASH;
152 typedef struct lookup_dir_entry_st BY_DIR_ENTRY;
153 DEFINE_STACK_OF(BY_DIR_HASH)
154 DEFINE_STACK_OF(BY_DIR_ENTRY)
155 typedef STACK_OF(X509_NAME_ENTRY) STACK_OF_X509_NAME_ENTRY;
156 DEFINE_STACK_OF(STACK_OF_X509_NAME_ENTRY)
157 
158 int ossl_x509_likely_issued(X509 *issuer, X509 *subject);
159 int ossl_x509_signing_allowed(const X509 *issuer, const X509 *subject);
160