crypto/pkcs7/pk7_attr.c

   1 /*
   2  * Copyright 1999-2020 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 <stdlib.h>
  12 #include <openssl/bio.h>
  13 #include <openssl/asn1.h>
  14 #include <openssl/asn1t.h>
  15 #include <openssl/pem.h>
  16 #include <openssl/pkcs7.h>
  17 #include <openssl/x509.h>
  18 #include <openssl/err.h>
  19
  20 int PKCS7_add_attrib_smimecap(PKCS7_SIGNER_INFO *si,
  21                               STACK_OF(X509_ALGOR) *cap)
  22 {
  23     ASN1_STRING *seq;
  24
  25     if ((seq = ASN1_STRING_new()) == NULL) {
  26         ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
  27         return 0;
  28     }
  29     seq->length = ASN1_item_i2d((ASN1_VALUE *)cap, &seq->data,
  30                                 ASN1_ITEM_rptr(X509_ALGORS));
  31     return PKCS7_add_signed_attribute(si, NID_SMIMECapabilities,
  32                                       V_ASN1_SEQUENCE, seq);
  33 }
  34
  35 STACK_OF(X509_ALGOR) *PKCS7_get_smimecap(PKCS7_SIGNER_INFO *si)
  36 {
  37     ASN1_TYPE *cap;
  38     const unsigned char *p;
  39
  40     cap = PKCS7_get_signed_attribute(si, NID_SMIMECapabilities);
  41     if (cap == NULL || (cap->type != V_ASN1_SEQUENCE))
  42         return NULL;
  43     p = cap->value.sequence->data;
  44     return (STACK_OF(X509_ALGOR) *)
  45         ASN1_item_d2i(NULL, &p, cap->value.sequence->length,
  46                       ASN1_ITEM_rptr(X509_ALGORS));
  47 }
  48
  49 /* Basic smime-capabilities OID and optional integer arg */
  50 int PKCS7_simple_smimecap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
  51 {
  52     ASN1_INTEGER *nbit = NULL;
  53     X509_ALGOR *alg;
  54
  55     if ((alg = X509_ALGOR_new()) == NULL) {
  56         ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
  57         return 0;
  58     }
  59     ASN1_OBJECT_free(alg->algorithm);
  60     alg->algorithm = OBJ_nid2obj(nid);
  61     if (arg > 0) {
  62         if ((alg->parameter = ASN1_TYPE_new()) == NULL) {
  63             ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
  64             goto err;
  65         }
  66         if ((nbit = ASN1_INTEGER_new()) == NULL) {
  67             ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
  68             goto err;
  69         }
  70         if (!ASN1_INTEGER_set(nbit, arg)) {
  71             ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
  72             goto err;
  73         }
  74         alg->parameter->value.integer = nbit;
  75         alg->parameter->type = V_ASN1_INTEGER;
  76         nbit = NULL;
  77     }
  78     if (!sk_X509_ALGOR_push(sk, alg)) {
  79         ERR_raise(ERR_LIB_PKCS7, ERR_R_CRYPTO_LIB);
  80         goto err;
  81     }
  82     return 1;
  83 err:
  84     ASN1_INTEGER_free(nbit);
  85     X509_ALGOR_free(alg);
  86     return 0;
  87 }
  88
  89 int PKCS7_add_attrib_content_type(PKCS7_SIGNER_INFO *si, ASN1_OBJECT *coid)
  90 {
  91     if (PKCS7_get_signed_attribute(si, NID_pkcs9_contentType))
  92         return 0;
  93     if (!coid)
  94         coid = OBJ_nid2obj(NID_pkcs7_data);
  95     return PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
  96                                       V_ASN1_OBJECT, coid);
  97 }
  98
  99 int PKCS7_add0_attrib_signing_time(PKCS7_SIGNER_INFO *si, ASN1_TIME *t)
 100 {
 101     if (t == NULL && (t = X509_gmtime_adj(NULL, 0)) == NULL) {
 102         ERR_raise(ERR_LIB_PKCS7, ERR_R_X509_LIB);
 103         return 0;
 104     }
 105     return PKCS7_add_signed_attribute(si, NID_pkcs9_signingTime,
 106                                       V_ASN1_UTCTIME, t);
 107 }
 108
 109 int PKCS7_add1_attrib_digest(PKCS7_SIGNER_INFO *si,
 110                              const unsigned char *md, int mdlen)
 111 {
 112     ASN1_OCTET_STRING *os;
 113     os = ASN1_OCTET_STRING_new();
 114     if (os == NULL)
 115         return 0;
 116     if (!ASN1_STRING_set(os, md, mdlen)
 117         || !PKCS7_add_signed_attribute(si, NID_pkcs9_messageDigest,
 118                                        V_ASN1_OCTET_STRING, os)) {
 119         ASN1_OCTET_STRING_free(os);
 120         return 0;
 121     }
 122     return 1;
 123 }