wbrawner/openssl
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
openssl/crypto/evp/evp_lib.c
Matt Caswell 76ca35e724 Fix no-dh 
The recent move of the DH code into the default provider broke no-dh. This
adds back in various missing guards.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9399)
2019-07-19 17:33:35 +01:00

863 lines
21 KiB
C
Raw Blame History

/*
* Copyright 1995-2018 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 "internal/evp_int.h"
#include "internal/provider.h"
#include "evp_locl.h"
#if !defined(FIPS_MODE)
int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int ret;
const EVP_CIPHER *cipher = c->cipher;
if (cipher->prov != NULL) {
/*
* The cipher has come from a provider and won't have the default flags.
* Find the implicit form so we can check the flags.
* TODO(3.0): This won't work for 3rd party ciphers we know nothing about
* We'll need to think of something else for those.
*/
cipher = EVP_get_cipherbynid(cipher->nid);
if (cipher == NULL) {
EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ASN1_R_UNSUPPORTED_CIPHER);
return -1;
}
}
if (cipher->set_asn1_parameters != NULL)
ret = cipher->set_asn1_parameters(c, type);
else if (cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
switch (EVP_CIPHER_mode(cipher)) {
case EVP_CIPH_WRAP_MODE:
if (EVP_CIPHER_nid(cipher) == NID_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
ret = -1;
if (ret <= 0)
EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ret == -2 ?
ASN1_R_UNSUPPORTED_CIPHER :
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;
const EVP_CIPHER *cipher = c->cipher;
if (cipher->prov != NULL) {
/*
* The cipher has come from a provider and won't have the default flags.
* Find the implicit form so we can check the flags.
*/
cipher = EVP_get_cipherbynid(cipher->nid);
if (cipher == NULL)
return -1;
}
if (cipher->get_asn1_parameters != NULL)
ret = cipher->get_asn1_parameters(c, type);
else if (cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
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);
break;
}
} else
ret = -1;
if (ret <= 0)
EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, ret == -2 ?
EVP_R_UNSUPPORTED_CIPHER :
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;
if (type != NULL) {
j = EVP_CIPHER_CTX_iv_length(c);
OPENSSL_assert(j <= sizeof(c->iv));
i = ASN1_TYPE_set_octetstring(type, c->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_block_size(const EVP_CIPHER *cipher)
{
int ok, v = cipher->block_size;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_BLOCK_SIZE, &v);
ok = evp_do_ciph_getparams(cipher, params);
return ok != 0 ? v : -1;
}
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) {
size_t outl = 0; /* ignored */
int blocksize = EVP_CIPHER_CTX_block_size(ctx);
if (ctx->cipher->ccipher != NULL)
return
ctx->cipher->ccipher(ctx->provctx, out, &outl,
inl + (blocksize == 1 ? 0 : blocksize),
in, (size_t)inl);
return 0;
}
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)
{
int ok;
unsigned long v = cipher->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_ciph_getparams(cipher, params);
return ok != 0 ? v : 0;
}
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)
{
int ok, v = cipher->iv_len;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_IVLEN, &v);
ok = evp_do_ciph_getparams(cipher, params);
return ok != 0 ? v : -1;
}
int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
{
return EVP_CIPHER_iv_length(ctx->cipher);
}
const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
{
return ctx->oiv;
}
/*
* 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, v = ctx->num;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_NUM, &v);
ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ok != 0 ? v : -1;
}
int EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
{
int ok;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_NUM, &num);
ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
if (ok != 0)
ctx->num = num;
return ok != 0;
}
int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
{
int ok, v = cipher->key_len;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_KEYLEN, &v);
ok = evp_do_ciph_getparams(cipher, params);
return ok != 0 ? v : -1;
}
int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
{
int ok, v = ctx->key_len;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_KEYLEN, &v);
ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
return ok != 0 ? v : -1;
}
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_mode(const EVP_CIPHER *cipher)
{
int ok, v = EVP_CIPHER_flags(cipher) & EVP_CIPH_MODE;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_MODE, &v);
ok = evp_do_ciph_getparams(cipher, params);
return ok != 0 ? v : 0;
}
int EVP_MD_block_size(const EVP_MD *md)
{
if (md == NULL) {
EVPerr(EVP_F_EVP_MD_BLOCK_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
return -1;
}
if (md->prov != NULL && md->dblock_size != NULL)
return (int)md->dblock_size();
return md->block_size;
}
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)
{
if (!md) {
EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
return -1;
}
if (md->prov != NULL && md->size != NULL)
return (int)md->size();
return md->md_size;
}
unsigned long EVP_MD_flags(const EVP_MD *md)
{
return md->flags;
}
EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
{
EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
if (md != NULL) {
md->type = md_type;
md->pkey_type = pkey_type;
md->lock = CRYPTO_THREAD_lock_new();
if (md->lock == NULL) {
OPENSSL_free(md);
return NULL;
}
md->refcnt = 1;
}
return md;
}
EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
{
EVP_MD *to = EVP_MD_meth_new(md->type, md->pkey_type);
if (to != NULL) {
CRYPTO_RWLOCK *lock = to->lock;
memcpy(to, md, sizeof(*to));
to->lock = lock;
}
return to;
}
int EVP_MD_up_ref(EVP_MD *md)
{
int ref = 0;
CRYPTO_UP_REF(&md->refcnt, &ref, md->lock);
return 1;
}
void EVP_MD_meth_free(EVP_MD *md)
{
if (md != NULL) {
int i;
CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock);
if (i > 0)
return;
ossl_provider_free(md->prov);
CRYPTO_THREAD_lock_free(md->lock);
OPENSSL_free(md);
}
}
int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
{
md->block_size = blocksize;
return 1;
}
int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
{
md->md_size = resultsize;
return 1;
}
int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
{
md->ctx_size = datasize;
return 1;
}
int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
{
md->flags = flags;
return 1;
}
int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
{
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))
{
md->update = update;
return 1;
}
int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
unsigned char *md))
{
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))
{
md->copy = copy;
return 1;
}
int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
{
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))
{
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;
}
#ifndef FIPS_MODE
# ifndef OPENSSL_NO_DH
/*
* TODO(3.0): Temporarily unavailable in FIPS mode. This will need to be added
* in later.
*/
# define MAX_PARAMS 10
typedef struct {
/* Number of the current param */
size_t curr;
struct {
/* Key for the current param */
const char *key;
/* Value for the current param */
const BIGNUM *bnparam;
/* Size of the buffer required for the BN */
size_t bufsz;
} params[MAX_PARAMS];
/* Running count of the total size required */
size_t totsz;
int ispublic;
} PARAMS_TEMPLATE;
static int push_param_bn(PARAMS_TEMPLATE *tmpl, const char *key,
const BIGNUM *bn)
{
int sz;
sz = BN_num_bytes(bn);
if (sz <= 0)
return 0;
tmpl->params[tmpl->curr].key = key;
tmpl->params[tmpl->curr].bnparam = bn;
tmpl->params[tmpl->curr++].bufsz = (size_t)sz;
tmpl->totsz += sizeof(OSSL_PARAM) + (size_t)sz;
return 1;
}
static OSSL_PARAM *param_template_to_param(PARAMS_TEMPLATE *tmpl, size_t *sz)
{
size_t i;
void *buf;
OSSL_PARAM *param = NULL;
unsigned char *currbuf = NULL;
if (tmpl->totsz == 0)
return NULL;
/* Add some space for the end of OSSL_PARAM marker */
tmpl->totsz += sizeof(*param);
if (tmpl->ispublic)
buf = OPENSSL_zalloc(tmpl->totsz);
else
buf = OPENSSL_secure_zalloc(tmpl->totsz);
if (buf == NULL)
return NULL;
param = buf;
currbuf = (unsigned char *)buf + (sizeof(*param) * (tmpl->curr + 1));
for (i = 0; i < tmpl->curr; i++) {
if (!ossl_assert((currbuf - (unsigned char *)buf )
+ tmpl->params[i].bufsz <= tmpl->totsz))
goto err;
if (BN_bn2nativepad(tmpl->params[i].bnparam, currbuf,
tmpl->params[i].bufsz) < 0)
goto err;
param[i] = OSSL_PARAM_construct_BN(tmpl->params[i].key, currbuf,
tmpl->params[i].bufsz);
currbuf += tmpl->params[i].bufsz;
}
param[i] = OSSL_PARAM_construct_end();
if (sz != NULL)
*sz = tmpl->totsz;
return param;
err:
if (tmpl->ispublic)
OPENSSL_free(param);
else
OPENSSL_clear_free(param, tmpl->totsz);
return NULL;
}
static OSSL_PARAM *evp_pkey_dh_to_param(EVP_PKEY *pkey, size_t *sz)
{
DH *dh = pkey->pkey.dh;
PARAMS_TEMPLATE tmpl = {0};
const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh);
const BIGNUM *pub_key = DH_get0_pub_key(dh);
const BIGNUM *priv_key = DH_get0_priv_key(dh);
if (p == NULL || g == NULL || pub_key == NULL)
return NULL;
if (!push_param_bn(&tmpl, OSSL_PKEY_PARAM_DH_P, p)
|| !push_param_bn(&tmpl, OSSL_PKEY_PARAM_DH_G, g)
|| !push_param_bn(&tmpl, OSSL_PKEY_PARAM_DH_PUB_KEY, pub_key))
return NULL;
if (q != NULL) {
if (!push_param_bn(&tmpl, OSSL_PKEY_PARAM_DH_Q, q))
return NULL;
}
if (priv_key != NULL) {
if (!push_param_bn(&tmpl, OSSL_PKEY_PARAM_DH_PRIV_KEY, priv_key))
return NULL;
} else {
tmpl.ispublic = 1;
}
return param_template_to_param(&tmpl, sz);
}
# endif /* OPENSSL_NO_DH */
OSSL_PARAM *evp_pkey_to_param(EVP_PKEY *pkey, size_t *sz)
{
switch (pkey->type) {
# ifndef OPENSSL_NO_DH
case EVP_PKEY_DH:
return evp_pkey_dh_to_param(pkey, sz);
# endif
default:
return NULL;
}
}
#endif /* FIPS_MODE */
Reference in a new issue View git blame Copy permalink