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author | Adam Langley <agl@google.com> | 2015-01-22 14:27:53 -0800 |
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committer | Adam Langley <agl@google.com> | 2015-01-30 16:52:14 -0800 |
commit | d9e397b599b13d642138480a28c14db7a136bf05 (patch) | |
tree | 34bab61dc4ce323b123ad4614dbc07e86ea2f9ef /src/crypto/evp/digestsign.c | |
download | external_boringssl-d9e397b599b13d642138480a28c14db7a136bf05.zip external_boringssl-d9e397b599b13d642138480a28c14db7a136bf05.tar.gz external_boringssl-d9e397b599b13d642138480a28c14db7a136bf05.tar.bz2 |
Initial commit of BoringSSL for Android.
Diffstat (limited to 'src/crypto/evp/digestsign.c')
-rw-r--r-- | src/crypto/evp/digestsign.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/src/crypto/evp/digestsign.c b/src/crypto/evp/digestsign.c new file mode 100644 index 0000000..c86b805 --- /dev/null +++ b/src/crypto/evp/digestsign.c @@ -0,0 +1,205 @@ +/* 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/digest.h> +#include <openssl/err.h> + +#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); +} |