--- /dev/null
+/* 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 <openssl/evp.h>
+
+#include <openssl/err.h>
+
+#include "internal.h"
+#include "../fipsmodule/digest/internal.h"
+
+
+enum evp_sign_verify_t {
+ evp_sign,
+ evp_verify,
+};
+
+static const struct evp_md_pctx_ops md_pctx_ops = {
+ EVP_PKEY_CTX_free,
+ EVP_PKEY_CTX_dup,
+};
+
+static int uses_prehash(EVP_MD_CTX *ctx, enum evp_sign_verify_t op) {
+ return (op == evp_sign) ? (ctx->pctx->pmeth->sign != NULL)
+ : (ctx->pctx->pmeth->verify != NULL);
+}
+
+static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
+ const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
+ enum evp_sign_verify_t op) {
+ if (ctx->pctx == NULL) {
+ ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
+ }
+ if (ctx->pctx == NULL) {
+ return 0;
+ }
+ ctx->pctx_ops = &md_pctx_ops;
+
+ if (op == evp_verify) {
+ if (!EVP_PKEY_verify_init(ctx->pctx)) {
+ return 0;
+ }
+ } else {
+ if (!EVP_PKEY_sign_init(ctx->pctx)) {
+ return 0;
+ }
+ }
+
+ if (type != NULL &&
+ !EVP_PKEY_CTX_set_signature_md(ctx->pctx, type)) {
+ return 0;
+ }
+
+ if (uses_prehash(ctx, op)) {
+ if (type == NULL) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_NO_DEFAULT_DIGEST);
+ return 0;
+ }
+ if (!EVP_DigestInit_ex(ctx, type, e)) {
+ return 0;
+ }
+ }
+
+ if (pctx) {
+ *pctx = ctx->pctx;
+ }
+ 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, evp_sign);
+}
+
+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, evp_verify);
+}
+
+int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
+ if (!uses_prehash(ctx, evp_sign)) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return 0;
+ }
+
+ return EVP_DigestUpdate(ctx, data, len);
+}
+
+int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
+ if (!uses_prehash(ctx, evp_verify)) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return 0;
+ }
+
+ return EVP_DigestUpdate(ctx, data, len);
+}
+
+int EVP_DigestSignFinal(EVP_MD_CTX *ctx, uint8_t *out_sig,
+ size_t *out_sig_len) {
+ if (!uses_prehash(ctx, evp_sign)) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return 0;
+ }
+
+ if (out_sig) {
+ EVP_MD_CTX tmp_ctx;
+ int ret;
+ uint8_t md[EVP_MAX_MD_SIZE];
+ unsigned int mdlen;
+
+ EVP_MD_CTX_init(&tmp_ctx);
+ ret = EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) &&
+ EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen) &&
+ EVP_PKEY_sign(ctx->pctx, out_sig, out_sig_len, md, mdlen);
+ EVP_MD_CTX_cleanup(&tmp_ctx);
+
+ return ret;
+ } else {
+ size_t s = EVP_MD_size(ctx->digest);
+ return EVP_PKEY_sign(ctx->pctx, out_sig, out_sig_len, NULL, s);
+ }
+}
+
+int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig,
+ size_t sig_len) {
+ if (!uses_prehash(ctx, evp_verify)) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return 0;
+ }
+
+ EVP_MD_CTX tmp_ctx;
+ int ret;
+ uint8_t md[EVP_MAX_MD_SIZE];
+ unsigned int mdlen;
+
+ EVP_MD_CTX_init(&tmp_ctx);
+ ret = EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) &&
+ EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen) &&
+ EVP_PKEY_verify(ctx->pctx, sig, sig_len, md, mdlen);
+ EVP_MD_CTX_cleanup(&tmp_ctx);
+
+ return ret;
+}
+
+int EVP_DigestSign(EVP_MD_CTX *ctx, uint8_t *out_sig, size_t *out_sig_len,
+ const uint8_t *data, size_t data_len) {
+ if (uses_prehash(ctx, evp_sign)) {
+ // If |out_sig| is NULL, the caller is only querying the maximum output
+ // length. |data| should only be incorporated in the final call.
+ if (out_sig != NULL &&
+ !EVP_DigestSignUpdate(ctx, data, data_len)) {
+ return 0;
+ }
+
+ return EVP_DigestSignFinal(ctx, out_sig, out_sig_len);
+ }
+
+ if (ctx->pctx->pmeth->sign_message == NULL) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return 0;
+ }
+
+ return ctx->pctx->pmeth->sign_message(ctx->pctx, out_sig, out_sig_len, data,
+ data_len);
+}
+
+int EVP_DigestVerify(EVP_MD_CTX *ctx, const uint8_t *sig, size_t sig_len,
+ const uint8_t *data, size_t len) {
+ if (uses_prehash(ctx, evp_verify)) {
+ return EVP_DigestVerifyUpdate(ctx, data, len) &&
+ EVP_DigestVerifyFinal(ctx, sig, sig_len);
+ }
+
+ if (ctx->pctx->pmeth->verify_message == NULL) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return 0;
+ }
+
+ return ctx->pctx->pmeth->verify_message(ctx->pctx, sig, sig_len, data, len);
+}
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