| /* |
| * Copyright 1999-2022 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include "internal/cryptlib.h" |
| #include <openssl/conf.h> |
| #include <openssl/asn1.h> |
| #include <openssl/asn1t.h> |
| #include <openssl/x509v3.h> |
| #include "crypto/x509.h" |
| #include "ext_dat.h" |
| |
| static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| AUTHORITY_KEYID *akeyid, |
| STACK_OF(CONF_VALUE) |
| *extlist); |
| static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| X509V3_CTX *ctx, |
| STACK_OF(CONF_VALUE) *values); |
| |
| const X509V3_EXT_METHOD ossl_v3_akey_id = { |
| NID_authority_key_identifier, |
| X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID), |
| 0, 0, 0, 0, |
| 0, 0, |
| (X509V3_EXT_I2V) i2v_AUTHORITY_KEYID, |
| (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID, |
| 0, 0, |
| NULL |
| }; |
| |
| static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| AUTHORITY_KEYID *akeyid, |
| STACK_OF(CONF_VALUE) |
| *extlist) |
| { |
| char *tmp = NULL; |
| STACK_OF(CONF_VALUE) *origextlist = extlist, *tmpextlist; |
| |
| if (akeyid->keyid) { |
| tmp = i2s_ASN1_OCTET_STRING(NULL, akeyid->keyid); |
| if (tmp == NULL) { |
| ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| if (!X509V3_add_value((akeyid->issuer || akeyid->serial) ? "keyid" : NULL, |
| tmp, &extlist)) { |
| OPENSSL_free(tmp); |
| ERR_raise(ERR_LIB_X509V3, ERR_R_X509_LIB); |
| goto err; |
| } |
| OPENSSL_free(tmp); |
| } |
| if (akeyid->issuer) { |
| tmpextlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); |
| if (tmpextlist == NULL) { |
| ERR_raise(ERR_LIB_X509V3, ERR_R_X509_LIB); |
| goto err; |
| } |
| extlist = tmpextlist; |
| } |
| if (akeyid->serial) { |
| tmp = i2s_ASN1_OCTET_STRING(NULL, akeyid->serial); |
| if (tmp == NULL) { |
| ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| if (!X509V3_add_value("serial", tmp, &extlist)) { |
| OPENSSL_free(tmp); |
| goto err; |
| } |
| OPENSSL_free(tmp); |
| } |
| return extlist; |
| err: |
| if (origextlist == NULL) |
| sk_CONF_VALUE_pop_free(extlist, X509V3_conf_free); |
| return NULL; |
| } |
| |
| /*- |
| * Three explicit tags may be given, where 'keyid' and 'issuer' may be combined: |
| * 'none': do not add any authority key identifier. |
| * 'keyid': use the issuer's subject keyid; the option 'always' means its is |
| * an error if the issuer certificate doesn't have a subject key id. |
| * 'issuer': use the issuer's cert issuer and serial number. The default is |
| * to only use this if 'keyid' is not present. With the option 'always' |
| * this is always included. |
| */ |
| static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| X509V3_CTX *ctx, |
| STACK_OF(CONF_VALUE) *values) |
| { |
| char keyid = 0, issuer = 0; |
| int i, n = sk_CONF_VALUE_num(values); |
| CONF_VALUE *cnf; |
| ASN1_OCTET_STRING *ikeyid = NULL; |
| X509_NAME *isname = NULL; |
| GENERAL_NAMES *gens = NULL; |
| GENERAL_NAME *gen = NULL; |
| ASN1_INTEGER *serial = NULL; |
| X509_EXTENSION *ext; |
| X509 *issuer_cert; |
| int same_issuer, ss; |
| AUTHORITY_KEYID *akeyid = AUTHORITY_KEYID_new(); |
| |
| if (akeyid == NULL) |
| goto err; |
| |
| if (n == 1 && strcmp(sk_CONF_VALUE_value(values, 0)->name, "none") == 0) { |
| return akeyid; |
| } |
| |
| for (i = 0; i < n; i++) { |
| cnf = sk_CONF_VALUE_value(values, i); |
| if (cnf->value != NULL && strcmp(cnf->value, "always") != 0) { |
| ERR_raise_data(ERR_LIB_X509V3, X509V3_R_UNKNOWN_OPTION, |
| "name=%s option=%s", cnf->name, cnf->value); |
| goto err; |
| } |
| if (strcmp(cnf->name, "keyid") == 0 && keyid == 0) { |
| keyid = 1; |
| if (cnf->value != NULL) |
| keyid = 2; |
| } else if (strcmp(cnf->name, "issuer") == 0 && issuer == 0) { |
| issuer = 1; |
| if (cnf->value != NULL) |
| issuer = 2; |
| } else if (strcmp(cnf->name, "none") == 0 |
| || strcmp(cnf->name, "keyid") == 0 |
| || strcmp(cnf->name, "issuer") == 0) { |
| ERR_raise_data(ERR_LIB_X509V3, X509V3_R_BAD_VALUE, |
| "name=%s", cnf->name); |
| goto err; |
| } else { |
| ERR_raise_data(ERR_LIB_X509V3, X509V3_R_UNKNOWN_VALUE, |
| "name=%s", cnf->name); |
| goto err; |
| } |
| } |
| |
| if (ctx != NULL && (ctx->flags & X509V3_CTX_TEST) != 0) |
| return akeyid; |
| |
| if (ctx == NULL) { |
| ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER); |
| goto err; |
| } |
| if ((issuer_cert = ctx->issuer_cert) == NULL) { |
| ERR_raise(ERR_LIB_X509V3, X509V3_R_NO_ISSUER_CERTIFICATE); |
| goto err; |
| } |
| same_issuer = ctx->subject_cert == ctx->issuer_cert; |
| ERR_set_mark(); |
| if (ctx->issuer_pkey != NULL) |
| ss = X509_check_private_key(ctx->subject_cert, ctx->issuer_pkey); |
| else |
| ss = same_issuer; |
| ERR_pop_to_mark(); |
| |
| /* unless forced with "always", AKID is suppressed for self-signed certs */ |
| if (keyid == 2 || (keyid == 1 && !ss)) { |
| /* |
| * prefer any pre-existing subject key identifier of the issuer cert |
| * except issuer cert is same as subject cert and is not self-signed |
| */ |
| i = X509_get_ext_by_NID(issuer_cert, NID_subject_key_identifier, -1); |
| if (i >= 0 && (ext = X509_get_ext(issuer_cert, i)) != NULL |
| && !(same_issuer && !ss)) { |
| ikeyid = X509V3_EXT_d2i(ext); |
| if (ASN1_STRING_length(ikeyid) == 0) /* indicating "none" */ { |
| ASN1_OCTET_STRING_free(ikeyid); |
| ikeyid = NULL; |
| } |
| } |
| if (ikeyid == NULL && same_issuer && ctx->issuer_pkey != NULL) { |
| /* generate fallback AKID, emulating s2i_skey_id(..., "hash") */ |
| X509_PUBKEY *pubkey = NULL; |
| |
| if (X509_PUBKEY_set(&pubkey, ctx->issuer_pkey)) |
| ikeyid = ossl_x509_pubkey_hash(pubkey); |
| X509_PUBKEY_free(pubkey); |
| } |
| if (keyid == 2 && ikeyid == NULL) { |
| ERR_raise(ERR_LIB_X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_KEYID); |
| goto err; |
| } |
| } |
| |
| if (issuer == 2 || (issuer == 1 && !ss && ikeyid == NULL)) { |
| isname = X509_NAME_dup(X509_get_issuer_name(issuer_cert)); |
| serial = ASN1_INTEGER_dup(X509_get0_serialNumber(issuer_cert)); |
| if (isname == NULL || serial == NULL) { |
| ERR_raise(ERR_LIB_X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS); |
| goto err; |
| } |
| } |
| |
| if (isname != NULL) { |
| if ((gens = sk_GENERAL_NAME_new_null()) == NULL |
| || (gen = GENERAL_NAME_new()) == NULL |
| || !sk_GENERAL_NAME_push(gens, gen)) { |
| ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| gen->type = GEN_DIRNAME; |
| gen->d.dirn = isname; |
| } |
| |
| akeyid->issuer = gens; |
| gen = NULL; |
| gens = NULL; |
| akeyid->serial = serial; |
| akeyid->keyid = ikeyid; |
| |
| return akeyid; |
| |
| err: |
| sk_GENERAL_NAME_free(gens); |
| GENERAL_NAME_free(gen); |
| X509_NAME_free(isname); |
| ASN1_INTEGER_free(serial); |
| ASN1_OCTET_STRING_free(ikeyid); |
| AUTHORITY_KEYID_free(akeyid); |
| return NULL; |
| } |