remove 'keyid:' when printing simple X509 authority keyID (without issuer and serial)
[openssl.git] / crypto / x509v3 / v3_akey.c
1 /*
2  * Copyright 1999-2016 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 <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/conf.h>
13 #include <openssl/asn1.h>
14 #include <openssl/asn1t.h>
15 #include <openssl/x509v3.h>
16 #include "ext_dat.h"
17
18 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
19                                                  AUTHORITY_KEYID *akeyid,
20                                                  STACK_OF(CONF_VALUE)
21                                                  *extlist);
22 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
23                                             X509V3_CTX *ctx,
24                                             STACK_OF(CONF_VALUE) *values);
25
26 const X509V3_EXT_METHOD v3_akey_id = {
27     NID_authority_key_identifier,
28     X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
29     0, 0, 0, 0,
30     0, 0,
31     (X509V3_EXT_I2V) i2v_AUTHORITY_KEYID,
32     (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
33     0, 0,
34     NULL
35 };
36
37 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
38                                                  AUTHORITY_KEYID *akeyid,
39                                                  STACK_OF(CONF_VALUE)
40                                                  *extlist)
41 {
42     char *tmp;
43     if (akeyid->keyid) {
44         tmp = OPENSSL_buf2hexstr(akeyid->keyid->data, akeyid->keyid->length);
45         X509V3_add_value((akeyid->issuer || akeyid->serial) ? "keyid" : NULL, tmp, &extlist);
46         OPENSSL_free(tmp);
47     }
48     if (akeyid->issuer)
49         extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
50     if (akeyid->serial) {
51         tmp = OPENSSL_buf2hexstr(akeyid->serial->data, akeyid->serial->length);
52         X509V3_add_value("serial", tmp, &extlist);
53         OPENSSL_free(tmp);
54     }
55     return extlist;
56 }
57
58 /*-
59  * Currently two options:
60  * keyid: use the issuers subject keyid, the value 'always' means its is
61  * an error if the issuer certificate doesn't have a key id.
62  * issuer: use the issuers cert issuer and serial number. The default is
63  * to only use this if keyid is not present. With the option 'always'
64  * this is always included.
65  */
66
67 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
68                                             X509V3_CTX *ctx,
69                                             STACK_OF(CONF_VALUE) *values)
70 {
71     char keyid = 0, issuer = 0;
72     int i;
73     CONF_VALUE *cnf;
74     ASN1_OCTET_STRING *ikeyid = NULL;
75     X509_NAME *isname = NULL;
76     GENERAL_NAMES *gens = NULL;
77     GENERAL_NAME *gen = NULL;
78     ASN1_INTEGER *serial = NULL;
79     X509_EXTENSION *ext;
80     X509 *cert;
81     AUTHORITY_KEYID *akeyid;
82
83     for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
84         cnf = sk_CONF_VALUE_value(values, i);
85         if (strcmp(cnf->name, "keyid") == 0) {
86             keyid = 1;
87             if (cnf->value && strcmp(cnf->value, "always") == 0)
88                 keyid = 2;
89         } else if (strcmp(cnf->name, "issuer") == 0) {
90             issuer = 1;
91             if (cnf->value && strcmp(cnf->value, "always") == 0)
92                 issuer = 2;
93         } else {
94             X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, X509V3_R_UNKNOWN_OPTION);
95             ERR_add_error_data(2, "name=", cnf->name);
96             return NULL;
97         }
98     }
99
100     if (!ctx || !ctx->issuer_cert) {
101         if (ctx && (ctx->flags == CTX_TEST))
102             return AUTHORITY_KEYID_new();
103         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
104                   X509V3_R_NO_ISSUER_CERTIFICATE);
105         return NULL;
106     }
107
108     cert = ctx->issuer_cert;
109
110     if (keyid) {
111         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
112         if ((i >= 0) && (ext = X509_get_ext(cert, i)))
113             ikeyid = X509V3_EXT_d2i(ext);
114         if (keyid == 2 && !ikeyid) {
115             X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
116                       X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
117             return NULL;
118         }
119     }
120
121     if ((issuer && !ikeyid) || (issuer == 2)) {
122         isname = X509_NAME_dup(X509_get_issuer_name(cert));
123         serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
124         if (!isname || !serial) {
125             X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
126                       X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
127             goto err;
128         }
129     }
130
131     if ((akeyid = AUTHORITY_KEYID_new()) == NULL)
132         goto err;
133
134     if (isname) {
135         if ((gens = sk_GENERAL_NAME_new_null()) == NULL
136             || (gen = GENERAL_NAME_new()) == NULL
137             || !sk_GENERAL_NAME_push(gens, gen)) {
138             X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE);
139             goto err;
140         }
141         gen->type = GEN_DIRNAME;
142         gen->d.dirn = isname;
143     }
144
145     akeyid->issuer = gens;
146     gen = NULL;
147     gens = NULL;
148     akeyid->serial = serial;
149     akeyid->keyid = ikeyid;
150
151     return akeyid;
152
153  err:
154     sk_GENERAL_NAME_free(gens);
155     GENERAL_NAME_free(gen);
156     X509_NAME_free(isname);
157     ASN1_INTEGER_free(serial);
158     ASN1_OCTET_STRING_free(ikeyid);
159     return NULL;
160 }