/* 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 #include #include #include "internal.h" #include "../digest/internal.h" /* md_begin_digset is a callback from the |EVP_MD_CTX| code that is called when * a new digest is begun. */ static int md_begin_digest(EVP_MD_CTX *ctx) { int r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_DIGESTINIT, 0, ctx); return r > 0 || r == -2; } static const struct evp_md_pctx_ops md_pctx_ops = { EVP_PKEY_CTX_free, EVP_PKEY_CTX_dup, md_begin_digest, }; static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey, int is_verify) { 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 (type == NULL) { type = EVP_sha1(); } if (type == NULL) { OPENSSL_PUT_ERROR(EVP, do_sigver_init, EVP_R_NO_DEFAULT_DIGEST); return 0; } if (is_verify) { 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 (!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_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { return EVP_DigestUpdate(ctx, data, len); } int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { return EVP_DigestUpdate(ctx, data, len); } int EVP_DigestSignFinal(EVP_MD_CTX *ctx, uint8_t *out_sig, size_t *out_sig_len) { int r = 0; const int has_signctx = ctx->pctx->pmeth->signctx != NULL; if (out_sig) { EVP_MD_CTX tmp_ctx; uint8_t 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 (has_signctx) { r = tmp_ctx.pctx->pmeth->signctx(tmp_ctx.pctx, out_sig, out_sig_len, &tmp_ctx); } else { r = EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen); } EVP_MD_CTX_cleanup(&tmp_ctx); if (has_signctx || !r) { return r; } return EVP_PKEY_sign(ctx->pctx, out_sig, out_sig_len, md, mdlen); } else { if (has_signctx) { return ctx->pctx->pmeth->signctx(ctx->pctx, out_sig, out_sig_len, ctx); } 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) { EVP_MD_CTX tmp_ctx; uint8_t md[EVP_MAX_MD_SIZE]; int r; unsigned int mdlen; const int has_verifyctx = ctx->pctx->pmeth->verifyctx != NULL; EVP_MD_CTX_init(&tmp_ctx); if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx)) { return 0; } if (has_verifyctx) { r = tmp_ctx.pctx->pmeth->verifyctx(tmp_ctx.pctx, sig, sig_len, &tmp_ctx); } else { r = EVP_DigestFinal_ex(&tmp_ctx, md, &mdlen); } EVP_MD_CTX_cleanup(&tmp_ctx); if (has_verifyctx || !r) { return r; } return EVP_PKEY_verify(ctx->pctx, sig, sig_len, md, mdlen); }