[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/x509v3.h>
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| 13 | #include "internal/x509_int.h"
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| 14 | #include "ext_dat.h"
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| 15 |
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| 16 | static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
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| 17 | X509V3_CTX *ctx, char *str);
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| 18 | const X509V3_EXT_METHOD v3_skey_id = {
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| 19 | NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
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| 20 | 0, 0, 0, 0,
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| 21 | (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
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| 22 | (X509V3_EXT_S2I)s2i_skey_id,
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| 23 | 0, 0, 0, 0,
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| 24 | NULL
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| 25 | };
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| 26 |
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| 27 | char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
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| 28 | const ASN1_OCTET_STRING *oct)
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| 29 | {
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| 30 | return OPENSSL_buf2hexstr(oct->data, oct->length);
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| 31 | }
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| 32 |
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| 33 | ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
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| 34 | X509V3_CTX *ctx, const char *str)
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| 35 | {
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| 36 | ASN1_OCTET_STRING *oct;
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| 37 | long length;
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| 38 |
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| 39 | if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
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| 40 | X509V3err(X509V3_F_S2I_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE);
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| 41 | return NULL;
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| 42 | }
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| 43 |
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| 44 | if ((oct->data = OPENSSL_hexstr2buf(str, &length)) == NULL) {
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| 45 | ASN1_OCTET_STRING_free(oct);
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| 46 | return NULL;
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| 47 | }
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| 48 |
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| 49 | oct->length = length;
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| 50 |
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| 51 | return oct;
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| 52 |
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| 53 | }
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| 54 |
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| 55 | static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
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| 56 | X509V3_CTX *ctx, char *str)
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| 57 | {
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| 58 | ASN1_OCTET_STRING *oct;
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| 59 | X509_PUBKEY *pubkey;
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| 60 | const unsigned char *pk;
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| 61 | int pklen;
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| 62 | unsigned char pkey_dig[EVP_MAX_MD_SIZE];
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| 63 | unsigned int diglen;
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| 64 |
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| 65 | if (strcmp(str, "hash"))
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| 66 | return s2i_ASN1_OCTET_STRING(method, ctx, str);
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| 67 |
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| 68 | if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
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| 69 | X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
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| 70 | return NULL;
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| 71 | }
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| 72 |
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| 73 | if (ctx && (ctx->flags == CTX_TEST))
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| 74 | return oct;
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| 75 |
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| 76 | if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
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| 77 | X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
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| 78 | goto err;
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| 79 | }
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| 80 |
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| 81 | if (ctx->subject_req)
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| 82 | pubkey = ctx->subject_req->req_info.pubkey;
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| 83 | else
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| 84 | pubkey = ctx->subject_cert->cert_info.key;
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| 85 |
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| 86 | if (pubkey == NULL) {
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| 87 | X509V3err(X509V3_F_S2I_SKEY_ID, X509V3_R_NO_PUBLIC_KEY);
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| 88 | goto err;
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| 89 | }
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| 90 |
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| 91 | X509_PUBKEY_get0_param(NULL, &pk, &pklen, NULL, pubkey);
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| 92 |
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| 93 | if (!EVP_Digest(pk, pklen, pkey_dig, &diglen, EVP_sha1(), NULL))
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| 94 | goto err;
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| 95 |
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| 96 | if (!ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
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| 97 | X509V3err(X509V3_F_S2I_SKEY_ID, ERR_R_MALLOC_FAILURE);
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| 98 | goto err;
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| 99 | }
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| 100 |
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| 101 | return oct;
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| 102 |
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| 103 | err:
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| 104 | ASN1_OCTET_STRING_free(oct);
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| 105 | return NULL;
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| 106 | }
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