219 lines
7.0 KiB
C
219 lines
7.0 KiB
C
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/*
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* Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include "crypto/evp.h"
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#include "evp_local.h"
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static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
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{
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EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
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return 0;
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}
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static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
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int ver)
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{
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if (ctx->pctx == NULL)
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ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
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if (ctx->pctx == NULL)
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return 0;
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if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
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if (type == NULL) {
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int def_nid;
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if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
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type = EVP_get_digestbynid(def_nid);
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}
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if (type == NULL) {
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EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
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return 0;
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}
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}
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if (ver) {
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if (ctx->pctx->pmeth->verifyctx_init) {
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if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
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return 0;
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ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
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} else if (ctx->pctx->pmeth->digestverify != 0) {
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ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
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ctx->update = update;
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} else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
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return 0;
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}
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} else {
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if (ctx->pctx->pmeth->signctx_init) {
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if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
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return 0;
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ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
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} else if (ctx->pctx->pmeth->digestsign != 0) {
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ctx->pctx->operation = EVP_PKEY_OP_SIGN;
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ctx->update = update;
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} else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
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return 0;
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}
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}
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if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
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return 0;
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if (pctx)
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*pctx = ctx->pctx;
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if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
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return 1;
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if (!EVP_DigestInit_ex(ctx, type, e))
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return 0;
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/*
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* This indicates the current algorithm requires
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* special treatment before hashing the tbs-message.
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*/
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if (ctx->pctx->pmeth->digest_custom != NULL)
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return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
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return 1;
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}
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int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
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{
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return do_sigver_init(ctx, pctx, type, e, pkey, 0);
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}
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int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
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{
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return do_sigver_init(ctx, pctx, type, e, pkey, 1);
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}
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int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
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size_t *siglen)
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{
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int sctx = 0, r = 0;
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EVP_PKEY_CTX *pctx = ctx->pctx;
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if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
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if (!sigret)
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return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
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if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
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r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
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else {
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EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
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if (!dctx)
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return 0;
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r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
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EVP_PKEY_CTX_free(dctx);
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}
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return r;
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}
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if (pctx->pmeth->signctx)
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sctx = 1;
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else
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sctx = 0;
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if (sigret) {
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unsigned char md[EVP_MAX_MD_SIZE];
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unsigned int mdlen = 0;
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if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
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if (sctx)
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r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
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else
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r = EVP_DigestFinal_ex(ctx, md, &mdlen);
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} else {
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EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
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if (tmp_ctx == NULL)
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return 0;
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if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
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EVP_MD_CTX_free(tmp_ctx);
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return 0;
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}
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if (sctx)
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r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
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sigret, siglen, tmp_ctx);
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else
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r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
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EVP_MD_CTX_free(tmp_ctx);
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}
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if (sctx || !r)
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return r;
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if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
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return 0;
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} else {
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if (sctx) {
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if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
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return 0;
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} else {
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int s = EVP_MD_size(ctx->digest);
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if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
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return 0;
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}
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}
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return 1;
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}
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int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
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const unsigned char *tbs, size_t tbslen)
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{
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if (ctx->pctx->pmeth->digestsign != NULL)
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return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
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if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
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return 0;
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return EVP_DigestSignFinal(ctx, sigret, siglen);
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}
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int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
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size_t siglen)
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{
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unsigned char md[EVP_MAX_MD_SIZE];
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int r = 0;
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unsigned int mdlen = 0;
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int vctx = 0;
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if (ctx->pctx->pmeth->verifyctx)
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vctx = 1;
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else
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vctx = 0;
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if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
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if (vctx)
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r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
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else
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r = EVP_DigestFinal_ex(ctx, md, &mdlen);
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} else {
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EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
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if (tmp_ctx == NULL)
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return -1;
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if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
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EVP_MD_CTX_free(tmp_ctx);
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return -1;
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}
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if (vctx)
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r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
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sig, siglen, tmp_ctx);
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else
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r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
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EVP_MD_CTX_free(tmp_ctx);
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}
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if (vctx || !r)
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return r;
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return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
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}
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int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
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size_t siglen, const unsigned char *tbs, size_t tbslen)
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{
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if (ctx->pctx->pmeth->digestverify != NULL)
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return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
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if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
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return -1;
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return EVP_DigestVerifyFinal(ctx, sigret, siglen);
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}
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