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-rw-r--r--openssl/crypto/evp/m_sigver.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/openssl/crypto/evp/m_sigver.c b/openssl/crypto/evp/m_sigver.c
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+++ b/openssl/crypto/evp/m_sigver.c
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+/* m_sigver.c */
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2006.
+ */
+/* ====================================================================
+ * Copyright (c) 2006,2007 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include <openssl/x509.h>
+#include "evp_locl.h"
+
+static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
+ const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
+ int ver)
+{
+ if (ctx->pctx == NULL)
+ ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
+ if (ctx->pctx == NULL)
+ return 0;
+
+ 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 (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 (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;
+ return 1;
+}
+
+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, e, pkey, 0);
+}
+
+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, e, pkey, 1);
+}
+
+int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
+ size_t *siglen)
+{
+ int sctx, r = 0;
+ EVP_PKEY_CTX *pctx = ctx->pctx;
+ if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
+ EVP_PKEY_CTX *dctx;
+ if (!sigret)
+ return pctx->pmeth->signctx(pctx, sigret, siglen, 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) {
+ EVP_MD_CTX tmp_ctx;
+ unsigned char md[EVP_MAX_MD_SIZE];
+ unsigned int mdlen;
+ EVP_MD_CTX_init(&tmp_ctx);
+ if (!EVP_MD_CTX_copy_ex(&tmp_ctx, 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_cleanup(&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_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
+ size_t siglen)
+{
+ EVP_MD_CTX tmp_ctx;
+ unsigned char md[EVP_MAX_MD_SIZE];
+ int r;
+ unsigned int mdlen;
+ int vctx;
+
+ if (ctx->pctx->pmeth->verifyctx)
+ vctx = 1;
+ else
+ vctx = 0;
+ EVP_MD_CTX_init(&tmp_ctx);
+ if (!EVP_MD_CTX_copy_ex(&tmp_ctx, 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_cleanup(&tmp_ctx);
+ if (vctx || !r)
+ return r;
+ return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
+}
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