Viewing file:  a_digest.c (2.39 KB) -rw-r--r--
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/*
* Copyright 1995-2021 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
*/
/* We need to use some engine deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED
#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include "internal/cryptlib.h"
#include <openssl/engine.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/buffer.h>
#include <openssl/x509.h>
#include "crypto/x509.h"
#ifndef OPENSSL_NO_DEPRECATED_3_0
int ASN1_digest(i2d_of_void *i2d, const EVP_MD *type, char *data,
unsigned char *md, unsigned int *len)
{
int inl;
unsigned char *str, *p;
inl = i2d(data, NULL);
if (inl <= 0) {
ERR_raise(ERR_LIB_ASN1, ERR_R_INTERNAL_ERROR);
return 0;
}
if ((str = OPENSSL_malloc(inl)) == NULL) {
ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
return 0;
}
p = str;
i2d(data, &p);
if (!EVP_Digest(str, inl, md, len, type, NULL)) {
OPENSSL_free(str);
return 0;
}
OPENSSL_free(str);
return 1;
}
#endif
int ossl_asn1_item_digest_ex(const ASN1_ITEM *it, const EVP_MD *md, void *asn,
unsigned char *data, unsigned int *len,
OSSL_LIB_CTX *libctx, const char *propq)
{
int i, ret = 0;
unsigned char *str = NULL;
EVP_MD *fetched_md = (EVP_MD *)md;
i = ASN1_item_i2d(asn, &str, it);
if (i < 0 || str == NULL)
return 0;
if (EVP_MD_get0_provider(md) == NULL) {
#if !defined(OPENSSL_NO_ENGINE)
ENGINE *tmpeng = ENGINE_get_digest_engine(EVP_MD_get_type(md));
if (tmpeng != NULL)
ENGINE_finish(tmpeng);
else
#endif
fetched_md = EVP_MD_fetch(libctx, EVP_MD_get0_name(md), propq);
}
if (fetched_md == NULL)
goto err;
ret = EVP_Digest(str, i, data, len, fetched_md, NULL);
err:
OPENSSL_free(str);
if (fetched_md != md)
EVP_MD_free(fetched_md);
return ret;
}
int ASN1_item_digest(const ASN1_ITEM *it, const EVP_MD *md, void *asn,
unsigned char *data, unsigned int *len)
{
return ossl_asn1_item_digest_ex(it, md, asn, data, len, NULL, NULL);
}
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