/* 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_grpc/evp.h> #include <openssl_grpc/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); }