diff options
Diffstat (limited to 'openssl/crypto/cmac/cm_pmeth.c')
| -rw-r--r-- | openssl/crypto/cmac/cm_pmeth.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/openssl/crypto/cmac/cm_pmeth.c b/openssl/crypto/cmac/cm_pmeth.c new file mode 100644 index 000000000..072228ec7 --- /dev/null +++ b/openssl/crypto/cmac/cm_pmeth.c @@ -0,0 +1,224 @@ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project 2010. + */ +/* ==================================================================== + * Copyright (c) 2010 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. + * ==================================================================== + */ + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/x509.h> +#include <openssl/x509v3.h> +#include <openssl/evp.h> +#include <openssl/cmac.h> +#include "evp_locl.h" + +/* The context structure and "key" is simply a CMAC_CTX */ + +static int pkey_cmac_init(EVP_PKEY_CTX *ctx) + { + ctx->data = CMAC_CTX_new(); + if (!ctx->data) + return 0; + ctx->keygen_info_count = 0; + return 1; + } + +static int pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) + { + if (!pkey_cmac_init(dst)) + return 0; + if (!CMAC_CTX_copy(dst->data, src->data)) + return 0; + return 1; + } + +static void pkey_cmac_cleanup(EVP_PKEY_CTX *ctx) + { + CMAC_CTX_free(ctx->data); + } + +static int pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) + { + CMAC_CTX *cmkey = CMAC_CTX_new(); + CMAC_CTX *cmctx = ctx->data; + if (!cmkey) + return 0; + if (!CMAC_CTX_copy(cmkey, cmctx)) + { + CMAC_CTX_free(cmkey); + return 0; + } + EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey); + + return 1; + } + +static int int_update(EVP_MD_CTX *ctx,const void *data,size_t count) + { + if (!CMAC_Update(ctx->pctx->data, data, count)) + return 0; + return 1; + } + +static int cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx) + { + EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT); + mctx->update = int_update; + return 1; + } + +static int cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, + EVP_MD_CTX *mctx) + { + return CMAC_Final(ctx->data, sig, siglen); + } + +static int pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) + { + CMAC_CTX *cmctx = ctx->data; + switch (type) + { + + case EVP_PKEY_CTRL_SET_MAC_KEY: + if (!p2 || p1 < 0) + return 0; + if (!CMAC_Init(cmctx, p2, p1, NULL, NULL)) + return 0; + break; + + case EVP_PKEY_CTRL_CIPHER: + if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine)) + return 0; + break; + + case EVP_PKEY_CTRL_MD: + if (ctx->pkey && !CMAC_CTX_copy(ctx->data, + (CMAC_CTX *)ctx->pkey->pkey.ptr)) + return 0; + if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL)) + return 0; + break; + + default: + return -2; + + } + return 1; + } + +static int pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx, + const char *type, const char *value) + { + if (!value) + { + return 0; + } + if (!strcmp(type, "key")) + { + void *p = (void *)value; + return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, + strlen(p), p); + } + if (!strcmp(type, "cipher")) + { + const EVP_CIPHER *c; + c = EVP_get_cipherbyname(value); + if (!c) + return 0; + return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c); + } + if (!strcmp(type, "hexkey")) + { + unsigned char *key; + int r; + long keylen; + key = string_to_hex(value, &keylen); + if (!key) + return 0; + r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key); + OPENSSL_free(key); + return r; + } + return -2; + } + +const EVP_PKEY_METHOD cmac_pkey_meth = + { + EVP_PKEY_CMAC, + EVP_PKEY_FLAG_SIGCTX_CUSTOM, + pkey_cmac_init, + pkey_cmac_copy, + pkey_cmac_cleanup, + + 0, 0, + + 0, + pkey_cmac_keygen, + + 0, 0, + + 0, 0, + + 0,0, + + cmac_signctx_init, + cmac_signctx, + + 0,0, + + 0,0, + + 0,0, + + 0,0, + + pkey_cmac_ctrl, + pkey_cmac_ctrl_str + + }; |