[331] | 1 | /*
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| 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/conf.h>
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| 13 | #include <openssl/asn1.h>
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| 14 | #include <openssl/asn1t.h>
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| 15 | #include <openssl/x509v3.h>
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| 16 | #include "ext_dat.h"
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| 17 |
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| 18 | static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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| 19 | AUTHORITY_KEYID *akeyid,
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| 20 | STACK_OF(CONF_VALUE)
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| 21 | *extlist);
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| 22 | static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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| 23 | X509V3_CTX *ctx,
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| 24 | STACK_OF(CONF_VALUE) *values);
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| 25 |
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| 26 | const X509V3_EXT_METHOD v3_akey_id = {
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| 27 | NID_authority_key_identifier,
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| 28 | X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
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| 29 | 0, 0, 0, 0,
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| 30 | 0, 0,
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| 31 | (X509V3_EXT_I2V) i2v_AUTHORITY_KEYID,
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| 32 | (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
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| 33 | 0, 0,
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| 34 | NULL
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| 35 | };
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| 36 |
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| 37 | static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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| 38 | AUTHORITY_KEYID *akeyid,
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| 39 | STACK_OF(CONF_VALUE)
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| 40 | *extlist)
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| 41 | {
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| 42 | char *tmp;
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| 43 | if (akeyid->keyid) {
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| 44 | tmp = OPENSSL_buf2hexstr(akeyid->keyid->data, akeyid->keyid->length);
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| 45 | X509V3_add_value("keyid", tmp, &extlist);
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| 46 | OPENSSL_free(tmp);
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| 47 | }
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| 48 | if (akeyid->issuer)
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| 49 | extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
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| 50 | if (akeyid->serial) {
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| 51 | tmp = OPENSSL_buf2hexstr(akeyid->serial->data, akeyid->serial->length);
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| 52 | X509V3_add_value("serial", tmp, &extlist);
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| 53 | OPENSSL_free(tmp);
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| 54 | }
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| 55 | return extlist;
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| 56 | }
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| 57 |
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| 58 | /*-
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| 59 | * Currently two options:
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| 60 | * keyid: use the issuers subject keyid, the value 'always' means its is
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| 61 | * an error if the issuer certificate doesn't have a key id.
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| 62 | * issuer: use the issuers cert issuer and serial number. The default is
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| 63 | * to only use this if keyid is not present. With the option 'always'
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| 64 | * this is always included.
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| 65 | */
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| 66 |
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| 67 | static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
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| 68 | X509V3_CTX *ctx,
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| 69 | STACK_OF(CONF_VALUE) *values)
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| 70 | {
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| 71 | char keyid = 0, issuer = 0;
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| 72 | int i;
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| 73 | CONF_VALUE *cnf;
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| 74 | ASN1_OCTET_STRING *ikeyid = NULL;
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| 75 | X509_NAME *isname = NULL;
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| 76 | GENERAL_NAMES *gens = NULL;
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| 77 | GENERAL_NAME *gen = NULL;
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| 78 | ASN1_INTEGER *serial = NULL;
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| 79 | X509_EXTENSION *ext;
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| 80 | X509 *cert;
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| 81 | AUTHORITY_KEYID *akeyid;
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| 82 |
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| 83 | for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
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| 84 | cnf = sk_CONF_VALUE_value(values, i);
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| 85 | if (strcmp(cnf->name, "keyid") == 0) {
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| 86 | keyid = 1;
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| 87 | if (cnf->value && strcmp(cnf->value, "always") == 0)
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| 88 | keyid = 2;
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| 89 | } else if (strcmp(cnf->name, "issuer") == 0) {
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| 90 | issuer = 1;
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| 91 | if (cnf->value && strcmp(cnf->value, "always") == 0)
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| 92 | issuer = 2;
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| 93 | } else {
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| 94 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, X509V3_R_UNKNOWN_OPTION);
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| 95 | ERR_add_error_data(2, "name=", cnf->name);
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| 96 | return NULL;
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| 97 | }
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| 98 | }
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| 99 |
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| 100 | if (!ctx || !ctx->issuer_cert) {
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| 101 | if (ctx && (ctx->flags == CTX_TEST))
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| 102 | return AUTHORITY_KEYID_new();
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| 103 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
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| 104 | X509V3_R_NO_ISSUER_CERTIFICATE);
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| 105 | return NULL;
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| 106 | }
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| 107 |
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| 108 | cert = ctx->issuer_cert;
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| 109 |
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| 110 | if (keyid) {
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| 111 | i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
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| 112 | if ((i >= 0) && (ext = X509_get_ext(cert, i)))
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| 113 | ikeyid = X509V3_EXT_d2i(ext);
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| 114 | if (keyid == 2 && !ikeyid) {
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| 115 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
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| 116 | X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
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| 117 | return NULL;
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| 118 | }
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| 119 | }
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| 120 |
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| 121 | if ((issuer && !ikeyid) || (issuer == 2)) {
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| 122 | isname = X509_NAME_dup(X509_get_issuer_name(cert));
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| 123 | serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
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| 124 | if (!isname || !serial) {
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| 125 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,
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| 126 | X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
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| 127 | goto err;
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| 128 | }
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| 129 | }
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| 130 |
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| 131 | if ((akeyid = AUTHORITY_KEYID_new()) == NULL)
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| 132 | goto err;
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| 133 |
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| 134 | if (isname) {
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| 135 | if ((gens = sk_GENERAL_NAME_new_null()) == NULL
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| 136 | || (gen = GENERAL_NAME_new()) == NULL
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| 137 | || !sk_GENERAL_NAME_push(gens, gen)) {
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| 138 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE);
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| 139 | goto err;
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| 140 | }
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| 141 | gen->type = GEN_DIRNAME;
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| 142 | gen->d.dirn = isname;
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| 143 | }
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| 144 |
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| 145 | akeyid->issuer = gens;
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| 146 | gen = NULL;
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| 147 | gens = NULL;
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| 148 | akeyid->serial = serial;
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| 149 | akeyid->keyid = ikeyid;
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| 150 |
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| 151 | return akeyid;
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| 152 |
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| 153 | err:
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| 154 | sk_GENERAL_NAME_free(gens);
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| 155 | GENERAL_NAME_free(gen);
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| 156 | X509_NAME_free(isname);
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| 157 | ASN1_INTEGER_free(serial);
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| 158 | ASN1_OCTET_STRING_free(ikeyid);
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| 159 | return NULL;
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| 160 | }
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