2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
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
12 #include <sys/types.h>
14 #include "internal/cryptlib.h"
16 #include <openssl/bn.h>
17 #include <openssl/evp.h>
18 #include <openssl/x509.h>
19 #include <openssl/objects.h>
20 #include <openssl/buffer.h>
21 #include <openssl/core_names.h>
22 #include "crypto/asn1.h"
23 #include "crypto/evp.h"
25 #ifndef OPENSSL_NO_DEPRECATED_3_0
27 int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
28 ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
31 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
32 unsigned char *p, *buf_in = NULL, *buf_out = NULL;
33 int i, inl = 0, outl = 0;
34 size_t inll = 0, outll = 0;
38 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE);
41 for (i = 0; i < 2; i++) {
48 if (type->pkey_type == NID_dsaWithSHA1) {
50 * special case: RFC 2459 tells us to omit 'parameters' with
53 ASN1_TYPE_free(a->parameter);
55 } else if ((a->parameter == NULL) ||
56 (a->parameter->type != V_ASN1_NULL)) {
57 ASN1_TYPE_free(a->parameter);
58 if ((a->parameter = ASN1_TYPE_new()) == NULL)
60 a->parameter->type = V_ASN1_NULL;
62 ASN1_OBJECT_free(a->algorithm);
63 a->algorithm = OBJ_nid2obj(type->pkey_type);
64 if (a->algorithm == NULL) {
65 ASN1err(ASN1_F_ASN1_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE);
68 if (a->algorithm->length == 0) {
69 ASN1err(ASN1_F_ASN1_SIGN,
70 ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
74 inl = i2d(data, NULL);
76 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_INTERNAL_ERROR);
80 buf_in = OPENSSL_malloc(inll);
81 outll = outl = EVP_PKEY_size(pkey);
82 buf_out = OPENSSL_malloc(outll);
83 if (buf_in == NULL || buf_out == NULL) {
85 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE);
91 if (!EVP_SignInit_ex(ctx, type, NULL)
92 || !EVP_SignUpdate(ctx, (unsigned char *)buf_in, inl)
93 || !EVP_SignFinal(ctx, (unsigned char *)buf_out,
94 (unsigned int *)&outl, pkey)) {
96 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_EVP_LIB);
99 OPENSSL_free(signature->data);
100 signature->data = buf_out;
102 signature->length = outl;
104 * In the interests of compatibility, I'll make sure that the bit string
105 * has a 'not-used bits' value of 0
107 signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
108 signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
110 EVP_MD_CTX_free(ctx);
111 OPENSSL_clear_free((char *)buf_in, inll);
112 OPENSSL_clear_free((char *)buf_out, outll);
118 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
119 ASN1_BIT_STRING *signature, const void *data,
120 EVP_PKEY *pkey, const EVP_MD *md)
122 return ASN1_item_sign_ex(it, algor1, algor2, signature, data, NULL, pkey,
126 int ASN1_item_sign_ex(const ASN1_ITEM *it, X509_ALGOR *algor1,
127 X509_ALGOR *algor2, ASN1_BIT_STRING *signature,
128 const void *data, const ASN1_OCTET_STRING *id,
129 EVP_PKEY *pkey, const EVP_MD *md, OSSL_LIB_CTX *libctx,
133 EVP_MD_CTX *ctx = evp_md_ctx_new_ex(pkey, id, libctx, propq);
136 ASN1err(0, ERR_R_MALLOC_FAILURE);
139 if (!EVP_DigestSignInit(ctx, NULL, md, NULL, pkey))
142 rv = ASN1_item_sign_ctx(it, algor1, algor2, signature, data, ctx);
145 EVP_PKEY_CTX_free(EVP_MD_CTX_pkey_ctx(ctx));
146 EVP_MD_CTX_free(ctx);
150 int ASN1_item_sign_ctx(const ASN1_ITEM *it, X509_ALGOR *algor1,
151 X509_ALGOR *algor2, ASN1_BIT_STRING *signature,
152 const void *data, EVP_MD_CTX *ctx)
156 unsigned char *buf_in = NULL, *buf_out = NULL;
157 size_t inl = 0, outl = 0, outll = 0;
158 int signid, paramtype, buf_len = 0;
161 md = EVP_MD_CTX_md(ctx);
162 pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx));
165 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
169 if (pkey->ameth == NULL) {
170 EVP_PKEY_CTX *pctx = EVP_MD_CTX_pkey_ctx(ctx);
171 OSSL_PARAM params[2];
172 unsigned char aid[128];
176 || !EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
177 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
182 OSSL_PARAM_construct_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID,
184 params[1] = OSSL_PARAM_construct_end();
186 if (EVP_PKEY_CTX_get_params(pctx, params) <= 0)
189 if ((aid_len = params[0].return_size) == 0) {
190 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
191 ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
195 if (algor1 != NULL) {
196 const unsigned char *pp = aid;
198 if (d2i_X509_ALGOR(&algor1, &pp, aid_len) == NULL) {
199 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_INTERNAL_ERROR);
204 if (algor2 != NULL) {
205 const unsigned char *pp = aid;
207 if (d2i_X509_ALGOR(&algor2, &pp, aid_len) == NULL) {
208 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_INTERNAL_ERROR);
214 } else if (pkey->ameth->item_sign) {
215 rv = pkey->ameth->item_sign(ctx, it, data, algor1, algor2, signature);
217 outl = signature->length;
219 * Return value meanings:
221 * 1: method does everything.
222 * 2: carry on as normal.
223 * 3: ASN1 method sets algorithm identifiers: just sign.
226 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
235 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
240 #ifndef OPENSSL_NO_SM2
241 EVP_PKEY_id(pkey) == NID_sm2 ? NID_sm2 :
243 pkey->ameth->pkey_id;
245 if (!OBJ_find_sigid_by_algs(&signid, EVP_MD_nid(md), pkey_id)) {
246 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
247 ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
251 if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
252 paramtype = V_ASN1_NULL;
254 paramtype = V_ASN1_UNDEF;
257 X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
259 X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);
263 buf_len = ASN1_item_i2d(data, &buf_in, it);
266 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_INTERNAL_ERROR);
270 if (!EVP_DigestSign(ctx, NULL, &outll, buf_in, inl)) {
272 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
276 buf_out = OPENSSL_malloc(outll);
277 if (buf_in == NULL || buf_out == NULL) {
279 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_MALLOC_FAILURE);
283 if (!EVP_DigestSign(ctx, buf_out, &outl, buf_in, inl)) {
285 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
288 OPENSSL_free(signature->data);
289 signature->data = buf_out;
291 signature->length = outl;
293 * In the interests of compatibility, I'll make sure that the bit string
294 * has a 'not-used bits' value of 0
296 signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
297 signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
299 OPENSSL_clear_free((char *)buf_in, inl);
300 OPENSSL_clear_free((char *)buf_out, outll);