468 lines
12 KiB
C
468 lines
12 KiB
C
/* fipe/evp/fips_enc.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#define OPENSSL_FIPSAPI
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#include <stdio.h>
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#include <string.h>
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#include <openssl/evp.h>
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#include <openssl/err.h>
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#include <openssl/fips.h>
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void FIPS_cipher_ctx_init(EVP_CIPHER_CTX *ctx)
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{
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memset(ctx,0,sizeof(EVP_CIPHER_CTX));
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/* ctx->cipher=NULL; */
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}
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EVP_CIPHER_CTX *FIPS_cipher_ctx_new(void)
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{
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EVP_CIPHER_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
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if (ctx)
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FIPS_cipher_ctx_init(ctx);
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return ctx;
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}
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/* The purpose of these is to trap programs that attempt to use non FIPS
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* algorithms in FIPS mode and ignore the errors.
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*/
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static int bad_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{ FIPS_ERROR_IGNORED("Cipher init"); return 0;}
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static int bad_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{ FIPS_ERROR_IGNORED("Cipher update"); return 0;}
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/* NB: no cleanup because it is allowed after failed init */
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static int bad_set_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
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{ FIPS_ERROR_IGNORED("Cipher set_asn1"); return 0;}
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static int bad_get_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
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{ FIPS_ERROR_IGNORED("Cipher get_asn1"); return 0;}
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static int bad_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
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{ FIPS_ERROR_IGNORED("Cipher ctrl"); return 0;}
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static const EVP_CIPHER bad_cipher =
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{
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0,
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1,
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0,
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0,
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0,
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bad_init,
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bad_do_cipher,
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NULL,
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0,
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bad_set_asn1,
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bad_get_asn1,
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bad_ctrl,
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NULL
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};
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int FIPS_cipherinit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
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const unsigned char *key, const unsigned char *iv, int enc)
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{
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if(FIPS_selftest_failed())
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{
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FIPSerr(FIPS_F_FIPS_CIPHERINIT,FIPS_R_FIPS_SELFTEST_FAILED);
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ctx->cipher = &bad_cipher;
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return 0;
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}
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if (enc == -1)
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enc = ctx->encrypt;
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else
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{
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if (enc)
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enc = 1;
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ctx->encrypt = enc;
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}
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if (cipher)
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{
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/* Only FIPS ciphers allowed */
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if (FIPS_module_mode() && !(cipher->flags & EVP_CIPH_FLAG_FIPS) &&
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!(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
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{
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EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_DISABLED_FOR_FIPS);
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ctx->cipher = &bad_cipher;
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return 0;
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}
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/* Ensure a context left lying around from last time is cleared
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* (the previous check attempted to avoid this if the same
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* ENGINE and EVP_CIPHER could be used). */
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FIPS_cipher_ctx_cleanup(ctx);
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/* Restore encrypt field: it is zeroed by cleanup */
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ctx->encrypt = enc;
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ctx->cipher=cipher;
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if (ctx->cipher->ctx_size)
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{
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ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
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if (!ctx->cipher_data)
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{
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EVPerr(EVP_F_FIPS_CIPHERINIT, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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else
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{
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ctx->cipher_data = NULL;
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}
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ctx->key_len = cipher->key_len;
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ctx->flags = 0;
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if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
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{
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if(!FIPS_cipher_ctx_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
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{
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EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
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return 0;
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}
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}
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}
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else if(!ctx->cipher)
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{
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EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_NO_CIPHER_SET);
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return 0;
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}
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/* we assume block size is a power of 2 in *cryptUpdate */
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OPENSSL_assert(ctx->cipher->block_size == 1
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|| ctx->cipher->block_size == 8
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|| ctx->cipher->block_size == 16);
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if(!(M_EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
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switch(M_EVP_CIPHER_CTX_mode(ctx)) {
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case EVP_CIPH_STREAM_CIPHER:
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case EVP_CIPH_ECB_MODE:
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break;
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case EVP_CIPH_CFB_MODE:
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case EVP_CIPH_OFB_MODE:
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ctx->num = 0;
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/* fall-through */
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case EVP_CIPH_CBC_MODE:
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OPENSSL_assert(M_EVP_CIPHER_CTX_iv_length(ctx) <=
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(int)sizeof(ctx->iv));
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if(iv) memcpy(ctx->oiv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
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memcpy(ctx->iv, ctx->oiv, M_EVP_CIPHER_CTX_iv_length(ctx));
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break;
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case EVP_CIPH_CTR_MODE:
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/* Don't reuse IV for CTR mode */
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if(iv)
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memcpy(ctx->iv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
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break;
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default:
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return 0;
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break;
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}
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}
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if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
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if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
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}
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ctx->buf_len=0;
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ctx->final_used=0;
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ctx->block_mask=ctx->cipher->block_size-1;
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return 1;
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}
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void FIPS_cipher_ctx_free(EVP_CIPHER_CTX *ctx)
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{
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if (ctx)
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{
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FIPS_cipher_ctx_cleanup(ctx);
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OPENSSL_free(ctx);
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}
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}
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int FIPS_cipher_ctx_cleanup(EVP_CIPHER_CTX *c)
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{
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if (c->cipher != NULL)
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{
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if(c->cipher->cleanup && !c->cipher->cleanup(c))
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return 0;
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/* Cleanse cipher context data */
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if (c->cipher_data)
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OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
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}
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if (c->cipher_data)
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OPENSSL_free(c->cipher_data);
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memset(c,0,sizeof(EVP_CIPHER_CTX));
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return 1;
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}
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int FIPS_cipher_ctx_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
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{
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int ret;
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if (FIPS_selftest_failed())
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{
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FIPSerr(FIPS_F_FIPS_CIPHER_CTX_CTRL, FIPS_R_SELFTEST_FAILED);
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return 0;
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}
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if(!ctx->cipher) {
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EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
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return 0;
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}
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if(!ctx->cipher->ctrl) {
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EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
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return 0;
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}
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ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
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if(ret == -1) {
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EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
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return 0;
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}
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return ret;
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}
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int FIPS_cipher_ctx_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
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{
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if ((in == NULL) || (in->cipher == NULL))
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{
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EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
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return 0;
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}
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/* Only FIPS ciphers allowed */
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if (FIPS_module_mode() && !(in->cipher->flags & EVP_CIPH_FLAG_FIPS) &&
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!(out->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
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{
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EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY, EVP_R_DISABLED_FOR_FIPS);
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out->cipher = &bad_cipher;
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return 0;
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}
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FIPS_cipher_ctx_cleanup(out);
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memcpy(out,in,sizeof *out);
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if (in->cipher_data && in->cipher->ctx_size)
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{
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out->cipher_data=OPENSSL_malloc(in->cipher->ctx_size);
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if (!out->cipher_data)
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{
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EVPerr(EVP_F_FIPS_CIPHER_CTX_COPY,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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memcpy(out->cipher_data,in->cipher_data,in->cipher->ctx_size);
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}
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if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
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return in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out);
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return 1;
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}
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/* You can't really set the key length with FIPS, so just check that the
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caller sets the length the context already has. */
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int FIPS_cipher_ctx_set_key_length(EVP_CIPHER_CTX *ctx, int keylen)
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{
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if (ctx->key_len == keylen)
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return 1;
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EVPerr(EVP_F_FIPS_CIPHER_CTX_SET_KEY_LENGTH,EVP_R_INVALID_KEY_LENGTH);
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return 0;
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}
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int FIPS_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, unsigned int inl)
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{
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if (FIPS_selftest_failed())
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{
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FIPSerr(FIPS_F_FIPS_CIPHER, FIPS_R_SELFTEST_FAILED);
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return -1;
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}
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return ctx->cipher->do_cipher(ctx,out,in,inl);
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}
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const EVP_CIPHER *FIPS_get_cipherbynid(int nid)
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{
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switch (nid)
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{
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case NID_aes_128_cbc:
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return FIPS_evp_aes_128_cbc();
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case NID_aes_128_ccm:
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return FIPS_evp_aes_128_ccm();
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case NID_aes_128_cfb1:
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return FIPS_evp_aes_128_cfb1();
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case NID_aes_128_cfb128:
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return FIPS_evp_aes_128_cfb128();
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case NID_aes_128_cfb8:
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return FIPS_evp_aes_128_cfb8();
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case NID_aes_128_ctr:
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return FIPS_evp_aes_128_ctr();
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case NID_aes_128_ecb:
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return FIPS_evp_aes_128_ecb();
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case NID_aes_128_gcm:
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return FIPS_evp_aes_128_gcm();
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case NID_aes_128_ofb128:
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return FIPS_evp_aes_128_ofb();
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case NID_aes_128_xts:
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return FIPS_evp_aes_128_xts();
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case NID_aes_192_cbc:
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return FIPS_evp_aes_192_cbc();
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case NID_aes_192_ccm:
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return FIPS_evp_aes_192_ccm();
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case NID_aes_192_cfb1:
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return FIPS_evp_aes_192_cfb1();
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case NID_aes_192_cfb128:
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return FIPS_evp_aes_192_cfb128();
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case NID_aes_192_cfb8:
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return FIPS_evp_aes_192_cfb8();
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case NID_aes_192_ctr:
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return FIPS_evp_aes_192_ctr();
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case NID_aes_192_ecb:
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return FIPS_evp_aes_192_ecb();
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case NID_aes_192_gcm:
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return FIPS_evp_aes_192_gcm();
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case NID_aes_192_ofb128:
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return FIPS_evp_aes_192_ofb();
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case NID_aes_256_cbc:
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return FIPS_evp_aes_256_cbc();
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case NID_aes_256_ccm:
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return FIPS_evp_aes_256_ccm();
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case NID_aes_256_cfb1:
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return FIPS_evp_aes_256_cfb1();
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case NID_aes_256_cfb128:
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return FIPS_evp_aes_256_cfb128();
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case NID_aes_256_cfb8:
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return FIPS_evp_aes_256_cfb8();
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case NID_aes_256_ctr:
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return FIPS_evp_aes_256_ctr();
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case NID_aes_256_ecb:
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return FIPS_evp_aes_256_ecb();
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case NID_aes_256_gcm:
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return FIPS_evp_aes_256_gcm();
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case NID_aes_256_ofb128:
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return FIPS_evp_aes_256_ofb();
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case NID_aes_256_xts:
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return FIPS_evp_aes_256_xts();
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case NID_des_ede_ecb:
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return FIPS_evp_des_ede();
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case NID_des_ede3_ecb:
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return FIPS_evp_des_ede3();
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case NID_des_ede3_cbc:
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return FIPS_evp_des_ede3_cbc();
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case NID_des_ede3_cfb1:
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return FIPS_evp_des_ede3_cfb1();
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case NID_des_ede3_cfb64:
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return FIPS_evp_des_ede3_cfb64();
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case NID_des_ede3_cfb8:
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return FIPS_evp_des_ede3_cfb8();
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case NID_des_ede3_ofb64:
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return FIPS_evp_des_ede3_ofb();
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case NID_des_ede_cbc:
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return FIPS_evp_des_ede_cbc();
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case NID_des_ede_cfb64:
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return FIPS_evp_des_ede_cfb64();
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case NID_des_ede_ofb64:
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return FIPS_evp_des_ede_ofb();
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default:
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return NULL;
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}
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}
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