mirror/openssl
2
0
Fork 0
mirror of https://github.com/openssl/openssl.git synced 2025-01-24 13:55:42 +08:00
Code Issues Packages Projects Releases Wiki Activity
2c938e2ee8
openssl/crypto/evp/m_sigver.c
Richard Levitte 0e52100400 EVP: Make the SIGNATURE implementation leaner 
Because the algorithm to use is decided already when creating an
EVP_PKEY_CTX regardless of how it was created, it turns out that it's
unnecessary to provide the SIGNATURE method explicitly, and rather
always have it be fetched implicitly.

This means fewer changes for applications that want to use new
signature algorithms / implementations.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10303)
2019-11-05 22:22:29 +01:00

417 lines
13 KiB
C
Raw Blame History

/*
* Copyright 2006-2018 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/x509.h>
#include "crypto/evp.h"
#include "internal/provider.h"
#include "evp_local.h"
#ifndef FIPS_MODE
static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
{
EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
return 0;
}
static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
const EVP_MD *type, const char *mdname,
const char *props, ENGINE *e, EVP_PKEY *pkey,
int ver)
{
EVP_PKEY_CTX *locpctx = NULL;
EVP_SIGNATURE *signature = NULL;
void *provkey = NULL;
int ret;
if (ctx->provctx != NULL) {
if (!ossl_assert(ctx->digest != NULL)) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
if (ctx->digest->freectx != NULL)
ctx->digest->freectx(ctx->provctx);
ctx->provctx = NULL;
}
if (ctx->pctx == NULL)
ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
if (ctx->pctx == NULL)
return 0;
locpctx = ctx->pctx;
evp_pkey_ctx_free_old_ops(locpctx);
if (locpctx->algorithm == NULL)
goto legacy;
if (mdname == NULL) {
if (type != NULL) {
mdname = EVP_MD_name(type);
} else if (pkey != NULL) {
/*
* TODO(v3.0) work out a better way for EVP_PKEYs with no legacy
* component.
*/
if (pkey->pkey.ptr != NULL) {
int def_nid;
if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
mdname = OBJ_nid2sn(def_nid);
}
}
}
/*
* Because we cleared out old ops, we shouldn't need to worry about
* checking if signature is already there. Keymgmt is a different
* matter, as it isn't tied to a specific EVP_PKEY op.
*/
signature = EVP_SIGNATURE_fetch(locpctx->libctx, locpctx->algorithm,
locpctx->propquery);
if (signature != NULL && locpctx->keymgmt == NULL) {
int name_id = EVP_SIGNATURE_number(signature);
locpctx->keymgmt =
evp_keymgmt_fetch_by_number(locpctx->libctx, name_id,
locpctx->propquery);
}
if (locpctx->keymgmt == NULL
|| signature == NULL
|| (EVP_KEYMGMT_provider(locpctx->keymgmt)
!= EVP_SIGNATURE_provider(signature))) {
/*
* We don't have the full support we need with provided methods,
* let's go see if legacy does. Also, we don't need to free
* ctx->keymgmt here, as it's not necessarily tied to this
* operation. It will be freed by EVP_PKEY_CTX_free().
*/
EVP_SIGNATURE_free(signature);
goto legacy;
}
/* No more legacy from here down to legacy: */
locpctx->op.sig.signature = signature;
locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
: EVP_PKEY_OP_SIGNCTX;
locpctx->op.sig.sigprovctx
= signature->newctx(ossl_provider_ctx(signature->prov));
if (locpctx->op.sig.sigprovctx == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
goto err;
}
provkey =
evp_keymgmt_export_to_provider(locpctx->pkey, locpctx->keymgmt, 0);
if (provkey == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
goto err;
}
if (type != NULL) {
ctx->reqdigest = type;
} else {
/*
* This might be requested by a later call to EVP_MD_CTX_md(). In that
* case the "explicit fetch" rules apply for that function (as per
* man pages), i.e. the ref count is not updated so the EVP_MD should
* not be used beyound the lifetime of the EVP_MD_CTX.
*/
ctx->reqdigest = ctx->fetched_digest =
EVP_MD_fetch(locpctx->libctx, mdname, props);
}
if (ver) {
if (signature->digest_verify_init == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
goto err;
}
ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx,
mdname, props, provkey);
} else {
if (signature->digest_sign_init == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
goto err;
}
ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx,
mdname, props, provkey);
}
return ret ? 1 : 0;
err:
evp_pkey_ctx_free_old_ops(locpctx);
locpctx->operation = EVP_PKEY_OP_UNDEFINED;
return 0;
legacy:
if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
if (type == NULL) {
int def_nid;
if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
type = EVP_get_digestbynid(def_nid);
}
if (type == NULL) {
EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
return 0;
}
}
if (ver) {
if (ctx->pctx->pmeth->verifyctx_init) {
if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
return 0;
ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
} else if (ctx->pctx->pmeth->digestverify != 0) {
ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
ctx->update = update;
} else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
return 0;
}
} else {
if (ctx->pctx->pmeth->signctx_init) {
if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
return 0;
ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
} else if (ctx->pctx->pmeth->digestsign != 0) {
ctx->pctx->operation = EVP_PKEY_OP_SIGN;
ctx->update = update;
} else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
return 0;
}
}
if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
return 0;
if (pctx)
*pctx = ctx->pctx;
if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
return 1;
if (!EVP_DigestInit_ex(ctx, type, e))
return 0;
/*
* This indicates the current algorithm requires
* special treatment before hashing the tbs-message.
*/
if (ctx->pctx->pmeth->digest_custom != NULL)
return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
return 1;
}
int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
const char *mdname, const char *props, EVP_PKEY *pkey)
{
return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 0);
}
int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
{
return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 0);
}
int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
const char *mdname, const char *props,
EVP_PKEY *pkey)
{
return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, 1);
}
int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
{
return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, 1);
}
#endif /* FIPS_MDOE */
int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
{
EVP_PKEY_CTX *pctx = ctx->pctx;
if (pctx == NULL
|| pctx->operation != EVP_PKEY_OP_SIGNCTX
|| pctx->op.sig.sigprovctx == NULL
|| pctx->op.sig.signature == NULL)
goto legacy;
return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
data, dsize);
legacy:
return EVP_DigestUpdate(ctx, data, dsize);
}
int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
{
EVP_PKEY_CTX *pctx = ctx->pctx;
if (pctx == NULL
|| pctx->operation != EVP_PKEY_OP_VERIFYCTX
|| pctx->op.sig.sigprovctx == NULL
|| pctx->op.sig.signature == NULL)
goto legacy;
return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
data, dsize);
legacy:
return EVP_DigestUpdate(ctx, data, dsize);
}
#ifndef FIPS_MODE
int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
size_t *siglen)
{
int sctx = 0, r = 0;
EVP_PKEY_CTX *pctx = ctx->pctx;
if (pctx == NULL
|| pctx->operation != EVP_PKEY_OP_SIGNCTX
|| pctx->op.sig.sigprovctx == NULL
|| pctx->op.sig.signature == NULL)
goto legacy;
return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
sigret, siglen, SIZE_MAX);
legacy:
if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
if (!sigret)
return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
else {
EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
if (!dctx)
return 0;
r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
EVP_PKEY_CTX_free(dctx);
}
return r;
}
if (pctx->pmeth->signctx)
sctx = 1;
else
sctx = 0;
if (sigret) {
unsigned char md[EVP_MAX_MD_SIZE];
unsigned int mdlen = 0;
if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
if (sctx)
r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
else
r = EVP_DigestFinal_ex(ctx, md, &mdlen);
} else {
EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
if (tmp_ctx == NULL)
return 0;
if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
EVP_MD_CTX_free(tmp_ctx);
return 0;
}
if (sctx)
r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
sigret, siglen, tmp_ctx);
else
r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
EVP_MD_CTX_free(tmp_ctx);
}
if (sctx || !r)
return r;
if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
return 0;
} else {
if (sctx) {
if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
return 0;
} else {
int s = EVP_MD_size(ctx->digest);
if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
return 0;
}
}
return 1;
}
int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
const unsigned char *tbs, size_t tbslen)
{
if (ctx->pctx->pmeth->digestsign != NULL)
return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
return 0;
return EVP_DigestSignFinal(ctx, sigret, siglen);
}
int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
size_t siglen)
{
unsigned char md[EVP_MAX_MD_SIZE];
int r = 0;
unsigned int mdlen = 0;
int vctx = 0;
EVP_PKEY_CTX *pctx = ctx->pctx;
if (pctx == NULL
|| pctx->operation != EVP_PKEY_OP_VERIFYCTX
|| pctx->op.sig.sigprovctx == NULL
|| pctx->op.sig.signature == NULL)
goto legacy;
return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
sig, siglen);
legacy:
if (ctx->pctx->pmeth->verifyctx)
vctx = 1;
else
vctx = 0;
if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
if (vctx)
r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
else
r = EVP_DigestFinal_ex(ctx, md, &mdlen);
} else {
EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
if (tmp_ctx == NULL)
return -1;
if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
EVP_MD_CTX_free(tmp_ctx);
return -1;
}
if (vctx)
r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
sig, siglen, tmp_ctx);
else
r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
EVP_MD_CTX_free(tmp_ctx);
}
if (vctx || !r)
return r;
return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
}
int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
size_t siglen, const unsigned char *tbs, size_t tbslen)
{
if (ctx->pctx->pmeth->digestverify != NULL)
return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
return -1;
return EVP_DigestVerifyFinal(ctx, sigret, siglen);
}
#endif /* FIPS_MODE */
Reference in New Issue View Git Blame Copy Permalink