evp_lib.c
/*
* 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 "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/params.h>
#include <openssl/core_names.h>
#include <openssl/dh.h>
#include "crypto/evp.h"
#include "internal/provider.h"
#include "evp_local.h"
#if !defined(FIPS_MODE)
int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int ret = -1; /* Assume the worst */
const EVP_CIPHER *cipher = c->cipher;
/*
* For legacy implementations, we detect custom AlgorithmIdentifier
* parameter handling by checking if the function pointer
* cipher->set_asn1_parameters is set. We know that this pointer
* is NULL for provided implementations.
*
* Otherwise, for any implementation, we check the flag
* EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
* default AI parameter extraction.
*
* Otherwise, for provided implementations, we convert |type| to
* a DER encoded blob and pass to the implementation in OSSL_PARAM
* form.
*
* If none of the above applies, this operation is unsupported.
*/
if (cipher->set_asn1_parameters != NULL) {
ret = cipher->set_asn1_parameters(c, type);
} else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
switch (EVP_CIPHER_mode(cipher)) {
case EVP_CIPH_WRAP_MODE:
if (EVP_CIPHER_is_a(cipher, SN_id_smime_alg_CMS3DESwrap))
ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
ret = 1;
break;
case EVP_CIPH_GCM_MODE:
case EVP_CIPH_CCM_MODE:
case EVP_CIPH_XTS_MODE:
case EVP_CIPH_OCB_MODE:
ret = -2;
break;
default:
ret = EVP_CIPHER_set_asn1_iv(c, type);
}
} else if (cipher->prov != NULL) {
OSSL_PARAM params[3], *p = params;
unsigned char *der = NULL, *derp;
/*
* We make two passes, the first to get the appropriate buffer size,
* and the second to get the actual value.
*/
*p++ = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
NULL, 0);
*p = OSSL_PARAM_construct_end();
if (!EVP_CIPHER_CTX_get_params(c, params))
goto err;
/* ... but, we should get a return size too! */
if (params[0].return_size != 0
&& (der = OPENSSL_malloc(params[0].return_size)) != NULL) {
params[0].data = der;
params[0].data_size = params[0].return_size;
params[0].return_size = 0;
derp = der;
if (EVP_CIPHER_CTX_get_params(c, params)
&& d2i_ASN1_TYPE(&type, (const unsigned char **)&derp,
params[0].return_size) != NULL) {
ret = 1;
}
OPENSSL_free(der);
}
} else {
ret = -2;
}
err:
if (ret == -2)
EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ASN1_R_UNSUPPORTED_CIPHER);
else if (ret <= 0)
EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, EVP_R_CIPHER_PARAMETER_ERROR);
if (ret < -1)
ret = -1;
return ret;
}
int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int ret = -1; /* Assume the worst */
const EVP_CIPHER *cipher = c->cipher;
/*
* For legacy implementations, we detect custom AlgorithmIdentifier
* parameter handling by checking if there the function pointer
* cipher->get_asn1_parameters is set. We know that this pointer
* is NULL for provided implementations.
*
* Otherwise, for any implementation, we check the flag
* EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
* default AI parameter creation.
*
* Otherwise, for provided implementations, we get the AI parameter
* in DER encoded form from the implementation by requesting the
* appropriate OSSL_PARAM and converting the result to a ASN1_TYPE.
*
* If none of the above applies, this operation is unsupported.
*/
if (cipher->get_asn1_parameters != NULL) {
ret = cipher->get_asn1_parameters(c, type);
} else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
switch (EVP_CIPHER_mode(cipher)) {
case EVP_CIPH_WRAP_MODE:
ret = 1;
break;
case EVP_CIPH_GCM_MODE:
case EVP_CIPH_CCM_MODE:
case EVP_CIPH_XTS_MODE:
case EVP_CIPH_OCB_MODE:
ret = -2;
break;
default:
ret = EVP_CIPHER_get_asn1_iv(c, type);
}
} else if (cipher->prov != NULL) {
OSSL_PARAM params[3], *p = params;
unsigned char *der = NULL;
int derl = -1;
if ((derl = i2d_ASN1_TYPE(type, &der)) >= 0) {
*p++ =
OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
der, (size_t)derl);
*p = OSSL_PARAM_construct_end();
if (EVP_CIPHER_CTX_set_params(c, params))
ret = 1;
OPENSSL_free(der);
}
} else {
ret = -2;
}
if (ret == -2)
EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_UNSUPPORTED_CIPHER);
else if (ret <= 0)
EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_CIPHER_PARAMETER_ERROR);
if (ret < -1)
ret = -1;
return ret;
}
int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *ctx, ASN1_TYPE *type)
{
int i = 0;
unsigned int l;
if (type != NULL) {
unsigned char iv[EVP_MAX_IV_LENGTH];
l = EVP_CIPHER_CTX_iv_length(ctx);
if (!ossl_assert(l <= sizeof(iv)))
return -1;
i = ASN1_TYPE_get_octetstring(type, iv, l);
if (i != (int)l)
return -1;
if (!EVP_CipherInit_ex(ctx, NULL, NULL, NULL, iv, -1))
return -1;
}
return i;
}
int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int i = 0;
unsigned int j;
unsigned char *oiv = NULL;
if (type != NULL) {
oiv = (unsigned char *)EVP_CIPHER_CTX_original_iv(c);
j = EVP_CIPHER_CTX_iv_length(c);
OPENSSL_assert(j <= sizeof(c->iv));
i = ASN1_TYPE_set_octetstring(type, oiv, j);
}
return i;
}
#endif /* !defined(FIPS_MODE) */
/* Convert the various cipher NIDs and dummies to a proper OID NID */
int EVP_CIPHER_type(const EVP_CIPHER *ctx)
{
int nid;
nid = EVP_CIPHER_nid(ctx);
switch (nid) {
case NID_rc2_cbc:
case NID_rc2_64_cbc:
case NID_rc2_40_cbc:
return NID_rc2_cbc;
case NID_rc4:
case NID_rc4_40:
return NID_rc4;
case NID_aes_128_cfb128:
case NID_aes_128_cfb8:
case NID_aes_128_cfb1:
return NID_aes_128_cfb128;
case NID_aes_192_cfb128:
case NID_aes_192_cfb8:
case NID_aes_192_cfb1:
return NID_aes_192_cfb128;
case NID_aes_256_cfb128:
case NID_aes_256_cfb8:
case NID_aes_256_cfb1:
return NID_aes_256_cfb128;
case NID_des_cfb64:
case NID_des_cfb8:
case NID_des_cfb1:
return NID_des_cfb64;
case NID_des_ede3_cfb64:
case NID_des_ede3_cfb8:
case NID_des_ede3_cfb1:
return NID_des_cfb64;
default:
#ifdef FIPS_MODE
return NID_undef;
#else
{
/* Check it has an OID and it is valid */
ASN1_OBJECT *otmp = OBJ_nid2obj(nid);
if (OBJ_get0_data(otmp) == NULL)
nid = NID_undef;
ASN1_OBJECT_free(otmp);
return nid;
}
#endif
}
}
int evp_cipher_cache_constants(EVP_CIPHER *cipher)
{
int ok;
size_t ivlen = 0;
size_t blksz = 0;
size_t keylen = 0;
unsigned int mode = 0;
unsigned long flags = 0;
OSSL_PARAM params[6];
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_BLOCK_SIZE, &blksz);
params[1] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &ivlen);
params[2] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &keylen);
params[3] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_MODE, &mode);
params[4] = OSSL_PARAM_construct_ulong(OSSL_CIPHER_PARAM_FLAGS, &flags);
params[5] = OSSL_PARAM_construct_end();
ok = evp_do_ciph_getparams(cipher, params);
if (ok) {
/* Provided implementations may have a custom cipher_cipher */
if (cipher->prov != NULL && cipher->ccipher != NULL)
flags |= EVP_CIPH_FLAG_CUSTOM_CIPHER;
cipher->block_size = blksz;
cipher->iv_len = ivlen;
cipher->key_len = keylen;
cipher->flags = flags | mode;
}
return ok;
}
int EVP_CIPHER_block_size(const EVP_CIPHER *cipher)
{
return cipher->block_size;
}
int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
{
return EVP_CIPHER_block_size(ctx->cipher);
}
int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
{
return e->ctx_size;
}
int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, unsigned int inl)
{
if (ctx->cipher->prov != NULL) {
/*
* If the provided implementation has a ccipher function, we use it,
* and translate its return value like this: 0 => -1, 1 => outlen
*
* Otherwise, we call the cupdate function if in != NULL, or cfinal
* if in == NULL. Regardless of which, we return what we got.
*/
int ret = -1;
size_t outl = 0;
size_t blocksize = EVP_CIPHER_CTX_block_size(ctx);
if (ctx->cipher->ccipher != NULL)
ret = ctx->cipher->ccipher(ctx->provctx, out, &outl,
inl + (blocksize == 1 ? 0 : blocksize),
in, (size_t)inl)
? (int)outl : -1;
else if (in != NULL)
ret = ctx->cipher->cupdate(ctx->provctx, out, &outl,
inl + (blocksize == 1 ? 0 : blocksize),
in, (size_t)inl);
else
ret = ctx->cipher->cfinal(ctx->provctx, out, &outl,
blocksize == 1 ? 0 : blocksize);
return ret;
}
return ctx->cipher->do_cipher(ctx, out, in, inl);
}
const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher;
}
int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
{
return ctx->encrypt;
}
unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
{
return cipher->flags;
}
void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
{
return ctx->app_data;
}
void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
{
ctx->app_data = data;
}
void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher_data;
}
void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data)
{
void *old_cipher_data;
old_cipher_data = ctx->cipher_data;
ctx->cipher_data = cipher_data;
return old_cipher_data;
}
int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
{
return cipher->iv_len;
}
int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
{
int rv, len = EVP_CIPHER_iv_length(ctx->cipher);
size_t v = len;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &v);
rv = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
if (rv == EVP_CTRL_RET_UNSUPPORTED)
goto legacy;
return rv != 0 ? (int)v : -1;
/* TODO (3.0) Remove legacy support */
legacy:
if ((EVP_CIPHER_flags(ctx->cipher) & EVP_CIPH_CUSTOM_IV_LENGTH) != 0) {
rv = EVP_CIPHER_CTX_ctrl((EVP_CIPHER_CTX *)ctx, EVP_CTRL_GET_IVLEN,
0, &len);
return (rv == 1) ? len : -1;
}
return len;
}
int EVP_CIPHER_CTX_tag_length(const EVP_CIPHER_CTX *ctx)
{
int ret;
size_t v = 0;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, &v);
ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ret == 1 ? (int)v : 0;
}
const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
{
int ok;
const unsigned char *v = ctx->oiv;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] =
OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV,
(void **)&v, sizeof(ctx->oiv));
ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ok != 0 ? v : NULL;
}
/*
* OSSL_PARAM_OCTET_PTR gets us the pointer to the running IV in the provider
*/
const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
{
int ok;
const unsigned char *v = ctx->iv;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] =
OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV, (void **)&v,
sizeof(ctx->iv));
ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ok != 0 ? v : NULL;
}
unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
{
int ok;
unsigned char *v = ctx->iv;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] =
OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV, (void **)&v,
sizeof(ctx->iv));
ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ok != 0 ? v : NULL;
}
unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
{
return ctx->buf;
}
int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx)
{
int ok;
unsigned int v = (unsigned int)ctx->num;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &v);
ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
}
int EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
{
int ok;
unsigned int n = (unsigned int)num;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &n);
ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
if (ok != 0)
ctx->num = (int)n;
return ok != 0;
}
int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
{
return cipher->key_len;
}
int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
{
int ok;
size_t v = ctx->key_len;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &v);
ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
}
int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
{
return cipher->nid;
}
int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher->nid;
}
int EVP_CIPHER_is_a(const EVP_CIPHER *cipher, const char *name)
{
if (cipher->prov != NULL)
return evp_is_a(cipher->prov, cipher->name_id, NULL, name);
return evp_is_a(NULL, 0, EVP_CIPHER_name(cipher), name);
}
int EVP_CIPHER_number(const EVP_CIPHER *cipher)
{
return cipher->name_id;
}
const char *EVP_CIPHER_name(const EVP_CIPHER *cipher)
{
if (cipher->prov != NULL)
return evp_first_name(cipher->prov, cipher->name_id);
#ifndef FIPS_MODE
return OBJ_nid2sn(EVP_CIPHER_nid(cipher));
#else
return NULL;
#endif
}
void EVP_CIPHER_names_do_all(const EVP_CIPHER *cipher,
void (*fn)(const char *name, void *data),
void *data)
{
if (cipher->prov != NULL)
evp_names_do_all(cipher->prov, cipher->name_id, fn, data);
}
const OSSL_PROVIDER *EVP_CIPHER_provider(const EVP_CIPHER *cipher)
{
return cipher->prov;
}
int EVP_CIPHER_mode(const EVP_CIPHER *cipher)
{
return EVP_CIPHER_flags(cipher) & EVP_CIPH_MODE;
}
int EVP_MD_is_a(const EVP_MD *md, const char *name)
{
if (md->prov != NULL)
return evp_is_a(md->prov, md->name_id, NULL, name);
return evp_is_a(NULL, 0, EVP_MD_name(md), name);
}
int EVP_MD_number(const EVP_MD *md)
{
return md->name_id;
}
const char *EVP_MD_name(const EVP_MD *md)
{
if (md->prov != NULL)
return evp_first_name(md->prov, md->name_id);
#ifndef FIPS_MODE
return OBJ_nid2sn(EVP_MD_nid(md));
#else
return NULL;
#endif
}
void EVP_MD_names_do_all(const EVP_MD *md,
void (*fn)(const char *name, void *data),
void *data)
{
if (md->prov != NULL)
evp_names_do_all(md->prov, md->name_id, fn, data);
}
const OSSL_PROVIDER *EVP_MD_provider(const EVP_MD *md)
{
return md->prov;
}
int EVP_MD_block_size(const EVP_MD *md)
{
int ok;
size_t v = md->block_size;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
if (md == NULL) {
EVPerr(EVP_F_EVP_MD_BLOCK_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
return -1;
}
params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_BLOCK_SIZE, &v);
ok = evp_do_md_getparams(md, params);
return ok != 0 ? (int)v : -1;
}
int EVP_MD_type(const EVP_MD *md)
{
return md->type;
}
int EVP_MD_pkey_type(const EVP_MD *md)
{
return md->pkey_type;
}
int EVP_MD_size(const EVP_MD *md)
{
int ok;
size_t v = md->md_size;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
if (md == NULL) {
EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
return -1;
}
params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_SIZE, &v);
ok = evp_do_md_getparams(md, params);
return ok != 0 ? (int)v : -1;
}
unsigned long EVP_MD_flags(const EVP_MD *md)
{
int ok;
unsigned long v = md->flags;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_ulong(OSSL_CIPHER_PARAM_FLAGS, &v);
ok = evp_do_md_getparams(md, params);
return ok != 0 ? v : 0;
}
EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
{
EVP_MD *md = evp_md_new();
if (md != NULL) {
md->type = md_type;
md->pkey_type = pkey_type;
}
return md;
}
EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
{
EVP_MD *to = NULL;
/*
* Non-legacy EVP_MDs can't be duplicated like this.
* Use EVP_MD_up_ref() instead.
*/
if (md->prov != NULL)
return NULL;
if ((to = EVP_MD_meth_new(md->type, md->pkey_type)) != NULL) {
CRYPTO_RWLOCK *lock = to->lock;
memcpy(to, md, sizeof(*to));
to->lock = lock;
}
return to;
}
void EVP_MD_meth_free(EVP_MD *md)
{
EVP_MD_free(md);
}
int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
{
if (md->block_size != 0)
return 0;
md->block_size = blocksize;
return 1;
}
int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
{
if (md->md_size != 0)
return 0;
md->md_size = resultsize;
return 1;
}
int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
{
if (md->ctx_size != 0)
return 0;
md->ctx_size = datasize;
return 1;
}
int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
{
if (md->flags != 0)
return 0;
md->flags = flags;
return 1;
}
int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
{
if (md->init != NULL)
return 0;
md->init = init;
return 1;
}
int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
const void *data,
size_t count))
{
if (md->update != NULL)
return 0;
md->update = update;
return 1;
}
int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
unsigned char *md))
{
if (md->final != NULL)
return 0;
md->final = final;
return 1;
}
int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
const EVP_MD_CTX *from))
{
if (md->copy != NULL)
return 0;
md->copy = copy;
return 1;
}
int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
{
if (md->cleanup != NULL)
return 0;
md->cleanup = cleanup;
return 1;
}
int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
int p1, void *p2))
{
if (md->md_ctrl != NULL)
return 0;
md->md_ctrl = ctrl;
return 1;
}
int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
{
return md->block_size;
}
int EVP_MD_meth_get_result_size(const EVP_MD *md)
{
return md->md_size;
}
int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
{
return md->ctx_size;
}
unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
{
return md->flags;
}
int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
{
return md->init;
}
int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
const void *data,
size_t count)
{
return md->update;
}
int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
unsigned char *md)
{
return md->final;
}
int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
const EVP_MD_CTX *from)
{
return md->copy;
}
int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
{
return md->cleanup;
}
int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
int p1, void *p2)
{
return md->md_ctrl;
}
const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
{
if (ctx == NULL)
return NULL;
return ctx->reqdigest;
}
EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
{
return ctx->pctx;
}
#if !defined(FIPS_MODE)
/* TODO(3.0): EVP_DigestSign* not yet supported in FIPS module */
void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
{
/*
* it's reasonable to set NULL pctx (a.k.a clear the ctx->pctx), so
* we have to deal with the cleanup job here.
*/
if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
EVP_PKEY_CTX_free(ctx->pctx);
ctx->pctx = pctx;
if (pctx != NULL) {
/* make sure pctx is not freed when destroying EVP_MD_CTX */
EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
} else {
EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
}
}
#endif /* !defined(FIPS_MODE) */
void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
{
return ctx->md_data;
}
int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
const void *data, size_t count)
{
return ctx->update;
}
void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
int (*update) (EVP_MD_CTX *ctx,
const void *data, size_t count))
{
ctx->update = update;
}
void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
{
ctx->flags |= flags;
}
void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
{
ctx->flags &= ~flags;
}
int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
{
return (ctx->flags & flags);
}
void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
{
ctx->flags |= flags;
}
void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
{
ctx->flags &= ~flags;
}
int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
{
return (ctx->flags & flags);
}
int EVP_str2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
void *ctx, int cmd, const char *value)
{
size_t len;
len = strlen(value);
if (len > INT_MAX)
return -1;
return cb(ctx, cmd, (void *)value, len);
}
int EVP_hex2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
void *ctx, int cmd, const char *hex)
{
unsigned char *bin;
long binlen;
int rv = -1;
bin = OPENSSL_hexstr2buf(hex, &binlen);
if (bin == NULL)
return 0;
if (binlen <= INT_MAX)
rv = cb(ctx, cmd, bin, binlen);
OPENSSL_free(bin);
return rv;
}
