A local copy of OpenSSL from GitHub
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/*
* Copyright 1995-2020 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 <time.h>
#include <sys/types.h>
#include "internal/cryptlib.h"
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/objects.h>
#include <openssl/buffer.h>
#include <openssl/core_names.h>
#include "crypto/asn1.h"
#include "crypto/evp.h"
#ifndef OPENSSL_NO_DEPRECATED_3_0
int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
const EVP_MD *type)
{
EVP_MD_CTX *ctx = EVP_MD_CTX_new();
unsigned char *p, *buf_in = NULL, *buf_out = NULL;
int i, inl = 0, outl = 0;
size_t inll = 0, outll = 0;
X509_ALGOR *a;
if (ctx == NULL) {
ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE);
goto err;
}
for (i = 0; i < 2; i++) {
if (i == 0)
a = algor1;
else
a = algor2;
if (a == NULL)
continue;
if (type->pkey_type == NID_dsaWithSHA1) {
/*
* special case: RFC 2459 tells us to omit 'parameters' with
* id-dsa-with-sha1
*/
ASN1_TYPE_free(a->parameter);
a->parameter = NULL;
} else if ((a->parameter == NULL) ||
(a->parameter->type != V_ASN1_NULL)) {
ASN1_TYPE_free(a->parameter);
if ((a->parameter = ASN1_TYPE_new()) == NULL)
goto err;
a->parameter->type = V_ASN1_NULL;
}
ASN1_OBJECT_free(a->algorithm);
a->algorithm = OBJ_nid2obj(type->pkey_type);
if (a->algorithm == NULL) {
ASN1err(ASN1_F_ASN1_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE);
goto err;
}
if (a->algorithm->length == 0) {
ASN1err(ASN1_F_ASN1_SIGN,
ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
goto err;
}
}
inl = i2d(data, NULL);
if (inl <= 0) {
ASN1err(ASN1_F_ASN1_SIGN, ERR_R_INTERNAL_ERROR);
goto err;
}
inll = (size_t)inl;
buf_in = OPENSSL_malloc(inll);
outll = outl = EVP_PKEY_size(pkey);
buf_out = OPENSSL_malloc(outll);
if (buf_in == NULL || buf_out == NULL) {
outl = 0;
ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE);
goto err;
}
p = buf_in;
i2d(data, &p);
if (!EVP_SignInit_ex(ctx, type, NULL)
|| !EVP_SignUpdate(ctx, (unsigned char *)buf_in, inl)
|| !EVP_SignFinal(ctx, (unsigned char *)buf_out,
(unsigned int *)&outl, pkey)) {
outl = 0;
ASN1err(ASN1_F_ASN1_SIGN, ERR_R_EVP_LIB);
goto err;
}
OPENSSL_free(signature->data);
signature->data = buf_out;
buf_out = NULL;
signature->length = outl;
/*
* In the interests of compatibility, I'll make sure that the bit string
* has a 'not-used bits' value of 0
*/
signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
err:
EVP_MD_CTX_free(ctx);
OPENSSL_clear_free((char *)buf_in, inll);
OPENSSL_clear_free((char *)buf_out, outll);
return outl;
}
#endif
int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
ASN1_BIT_STRING *signature, const void *data,
EVP_PKEY *pkey, const EVP_MD *md)
{
return ASN1_item_sign_ex(it, algor1, algor2, signature, data, NULL, pkey,
md, NULL, NULL);
}
int ASN1_item_sign_ex(const ASN1_ITEM *it, X509_ALGOR *algor1,
X509_ALGOR *algor2, ASN1_BIT_STRING *signature,
const void *data, const ASN1_OCTET_STRING *id,
EVP_PKEY *pkey, const EVP_MD *md, OSSL_LIB_CTX *libctx,
const char *propq)
{
int rv = 0;
EVP_MD_CTX *ctx = evp_md_ctx_new_ex(pkey, id, libctx, propq);
if (ctx == NULL) {
ASN1err(0, ERR_R_MALLOC_FAILURE);
return 0;
}
if (!EVP_DigestSignInit(ctx, NULL, md, NULL, pkey))
goto err;
rv = ASN1_item_sign_ctx(it, algor1, algor2, signature, data, ctx);
err:
EVP_PKEY_CTX_free(EVP_MD_CTX_pkey_ctx(ctx));
EVP_MD_CTX_free(ctx);
return rv;
}
int ASN1_item_sign_ctx(const ASN1_ITEM *it, X509_ALGOR *algor1,
X509_ALGOR *algor2, ASN1_BIT_STRING *signature,
const void *data, EVP_MD_CTX *ctx)
{
const EVP_MD *md;
EVP_PKEY *pkey;
unsigned char *buf_in = NULL, *buf_out = NULL;
size_t inl = 0, outl = 0, outll = 0;
int signid, paramtype, buf_len = 0;
int rv, pkey_id;
md = EVP_MD_CTX_md(ctx);
pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx));
if (pkey == NULL) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
goto err;
}
if (pkey->ameth == NULL) {
EVP_PKEY_CTX *pctx = EVP_MD_CTX_pkey_ctx(ctx);
OSSL_PARAM params[2];
unsigned char aid[128];
size_t aid_len = 0;
if (pctx == NULL
|| !EVP_PKEY_CTX_IS_SIGNATURE_OP(pctx)) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
goto err;
}
params[0] =
OSSL_PARAM_construct_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID,
aid, sizeof(aid));
params[1] = OSSL_PARAM_construct_end();
if (EVP_PKEY_CTX_get_params(pctx, params) <= 0)
goto err;
if ((aid_len = params[0].return_size) == 0) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
goto err;
}
if (algor1 != NULL) {
const unsigned char *pp = aid;
if (d2i_X509_ALGOR(&algor1, &pp, aid_len) == NULL) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_INTERNAL_ERROR);
goto err;
}
}
if (algor2 != NULL) {
const unsigned char *pp = aid;
if (d2i_X509_ALGOR(&algor2, &pp, aid_len) == NULL) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_INTERNAL_ERROR);
goto err;
}
}
rv = 3;
} else if (pkey->ameth->item_sign) {
rv = pkey->ameth->item_sign(ctx, it, data, algor1, algor2, signature);
if (rv == 1)
outl = signature->length;
/*-
* Return value meanings:
* <=0: error.
* 1: method does everything.
* 2: carry on as normal.
* 3: ASN1 method sets algorithm identifiers: just sign.
*/
if (rv <= 0)
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
if (rv <= 1)
goto err;
} else {
rv = 2;
}
if (rv == 2) {
if (md == NULL) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
goto err;
}
pkey_id =
#ifndef OPENSSL_NO_SM2
EVP_PKEY_id(pkey) == NID_sm2 ? NID_sm2 :
#endif
pkey->ameth->pkey_id;
if (!OBJ_find_sigid_by_algs(&signid, EVP_MD_nid(md), pkey_id)) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
goto err;
}
if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
paramtype = V_ASN1_NULL;
else
paramtype = V_ASN1_UNDEF;
if (algor1)
X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
if (algor2)
X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);
}
buf_len = ASN1_item_i2d(data, &buf_in, it);
if (buf_len <= 0) {
outl = 0;
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_INTERNAL_ERROR);
goto err;
}
inl = buf_len;
if (!EVP_DigestSign(ctx, NULL, &outll, buf_in, inl)) {
outl = 0;
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
goto err;
}
outl = outll;
buf_out = OPENSSL_malloc(outll);
if (buf_in == NULL || buf_out == NULL) {
outl = 0;
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_MALLOC_FAILURE);
goto err;
}
if (!EVP_DigestSign(ctx, buf_out, &outl, buf_in, inl)) {
outl = 0;
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
goto err;
}
OPENSSL_free(signature->data);
signature->data = buf_out;
buf_out = NULL;
signature->length = outl;
/*
* In the interests of compatibility, I'll make sure that the bit string
* has a 'not-used bits' value of 0
*/
signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
err:
OPENSSL_clear_free((char *)buf_in, inl);
OPENSSL_clear_free((char *)buf_out, outll);
return outl;
}