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Diffstat (limited to 'crypto/evp/enc_min.c')
| -rw-r--r-- | crypto/evp/enc_min.c | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/crypto/evp/enc_min.c b/crypto/evp/enc_min.c new file mode 100644 index 000000000000..7fba38ee2462 --- /dev/null +++ b/crypto/evp/enc_min.c @@ -0,0 +1,390 @@ +/* crypto/evp/enc_min.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * 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 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 acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS 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 AUTHOR OR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/evp.h> +#include <openssl/err.h> +#include <openssl/rand.h> +#ifndef OPENSSL_NO_ENGINE +#include <openssl/engine.h> +#endif +#include "evp_locl.h" + +void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx) + { +#ifdef OPENSSL_FIPS + FIPS_selftest_check(); +#endif + memset(ctx,0,sizeof(EVP_CIPHER_CTX)); + /* ctx->cipher=NULL; */ + } + +#ifdef OPENSSL_FIPS + +/* The purpose of these is to trap programs that attempt to use non FIPS + * algorithms in FIPS mode and ignore the errors. + */ + +static int bad_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { FIPS_ERROR_IGNORED("Cipher init"); return 0;} + +static int bad_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, unsigned int inl) + { FIPS_ERROR_IGNORED("Cipher update"); return 0;} + +/* NB: no cleanup because it is allowed after failed init */ + +static int bad_set_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ) + { FIPS_ERROR_IGNORED("Cipher set_asn1"); return 0;} +static int bad_get_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ) + { FIPS_ERROR_IGNORED("Cipher get_asn1"); return 0;} +static int bad_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) + { FIPS_ERROR_IGNORED("Cipher ctrl"); return 0;} + +static const EVP_CIPHER bad_cipher = + { + 0, + 0, + 0, + 0, + 0, + bad_init, + bad_do_cipher, + NULL, + 0, + bad_set_asn1, + bad_get_asn1, + bad_ctrl, + NULL + }; + +#endif + +#ifndef OPENSSL_NO_ENGINE + +#ifdef OPENSSL_FIPS + +static int do_engine_null(ENGINE *impl) { return 0;} +static int do_evp_enc_engine_null(EVP_CIPHER_CTX *ctx, + const EVP_CIPHER **pciph, ENGINE *impl) + { return 1; } + +static int (*do_engine_finish)(ENGINE *impl) + = do_engine_null; + +static int (*do_evp_enc_engine) + (EVP_CIPHER_CTX *ctx, const EVP_CIPHER **pciph, ENGINE *impl) + = do_evp_enc_engine_null; + +void int_EVP_CIPHER_set_engine_callbacks( + int (*eng_ciph_fin)(ENGINE *impl), + int (*eng_ciph_evp) + (EVP_CIPHER_CTX *ctx, const EVP_CIPHER **pciph, ENGINE *impl)) + { + do_engine_finish = eng_ciph_fin; + do_evp_enc_engine = eng_ciph_evp; + } + +#else + +#define do_engine_finish ENGINE_finish + +static int do_evp_enc_engine(EVP_CIPHER_CTX *ctx, const EVP_CIPHER **pcipher, ENGINE *impl) + { + if(impl) + { + if (!ENGINE_init(impl)) + { + EVPerr(EVP_F_DO_EVP_ENC_ENGINE, EVP_R_INITIALIZATION_ERROR); + return 0; + } + } + else + /* Ask if an ENGINE is reserved for this job */ + impl = ENGINE_get_cipher_engine((*pcipher)->nid); + if(impl) + { + /* There's an ENGINE for this job ... (apparently) */ + const EVP_CIPHER *c = ENGINE_get_cipher(impl, (*pcipher)->nid); + if(!c) + { + /* One positive side-effect of US's export + * control history, is that we should at least + * be able to avoid using US mispellings of + * "initialisation"? */ + EVPerr(EVP_F_DO_EVP_ENC_ENGINE, EVP_R_INITIALIZATION_ERROR); + return 0; + } + /* We'll use the ENGINE's private cipher definition */ + *pcipher = c; + /* Store the ENGINE functional reference so we know + * 'cipher' came from an ENGINE and we need to release + * it when done. */ + ctx->engine = impl; + } + else + ctx->engine = NULL; + return 1; + } + +#endif + +#endif + +int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl, + const unsigned char *key, const unsigned char *iv, int enc) + { + if (enc == -1) + enc = ctx->encrypt; + else + { + if (enc) + enc = 1; + ctx->encrypt = enc; + } +#ifdef OPENSSL_FIPS + if(FIPS_selftest_failed()) + { + FIPSerr(FIPS_F_EVP_CIPHERINIT_EX,FIPS_R_FIPS_SELFTEST_FAILED); + ctx->cipher = &bad_cipher; + return 0; + } +#endif +#ifndef OPENSSL_NO_ENGINE + /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts + * so this context may already have an ENGINE! Try to avoid releasing + * the previous handle, re-querying for an ENGINE, and having a + * reinitialisation, when it may all be unecessary. */ + if (ctx->engine && ctx->cipher && (!cipher || + (cipher && (cipher->nid == ctx->cipher->nid)))) + goto skip_to_init; +#endif + if (cipher) + { + /* Ensure a context left lying around from last time is cleared + * (the previous check attempted to avoid this if the same + * ENGINE and EVP_CIPHER could be used). */ + EVP_CIPHER_CTX_cleanup(ctx); + + /* Restore encrypt field: it is zeroed by cleanup */ + ctx->encrypt = enc; +#ifndef OPENSSL_NO_ENGINE + if (!do_evp_enc_engine(ctx, &cipher, impl)) + return 0; +#endif + + ctx->cipher=cipher; + if (ctx->cipher->ctx_size) + { + ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size); + if (!ctx->cipher_data) + { + EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); + return 0; + } + } + else + { + ctx->cipher_data = NULL; + } + ctx->key_len = cipher->key_len; + ctx->flags = 0; + if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT) + { + if(!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) + { + EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); + return 0; + } + } + } + else if(!ctx->cipher) + { + EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET); + return 0; + } +#ifndef OPENSSL_NO_ENGINE +skip_to_init: +#endif + /* we assume block size is a power of 2 in *cryptUpdate */ + OPENSSL_assert(ctx->cipher->block_size == 1 + || ctx->cipher->block_size == 8 + || ctx->cipher->block_size == 16); + + if(!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) { + switch(EVP_CIPHER_CTX_mode(ctx)) { + + case EVP_CIPH_STREAM_CIPHER: + case EVP_CIPH_ECB_MODE: + break; + + case EVP_CIPH_CFB_MODE: + case EVP_CIPH_OFB_MODE: + + ctx->num = 0; + + case EVP_CIPH_CBC_MODE: + + OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= + (int)sizeof(ctx->iv)); + if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); + memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); + break; + + default: + return 0; + break; + } + } + +#ifdef OPENSSL_FIPS + /* After 'key' is set no further parameters changes are permissible. + * So only check for non FIPS enabling at this point. + */ + if (key && FIPS_mode()) + { + if (!(ctx->cipher->flags & EVP_CIPH_FLAG_FIPS) + & !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)) + { + EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_DISABLED_FOR_FIPS); +#if 0 + ERR_add_error_data(2, "cipher=", + EVP_CIPHER_name(ctx->cipher)); +#endif + ctx->cipher = &bad_cipher; + return 0; + } + } +#endif + + if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { + if(!ctx->cipher->init(ctx,key,iv,enc)) return 0; + } + ctx->buf_len=0; + ctx->final_used=0; + ctx->block_mask=ctx->cipher->block_size-1; + return 1; + } + +int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c) + { + if (c->cipher != NULL) + { + if(c->cipher->cleanup && !c->cipher->cleanup(c)) + return 0; + /* Cleanse cipher context data */ + if (c->cipher_data) + OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size); + } + if (c->cipher_data) + OPENSSL_free(c->cipher_data); +#ifndef OPENSSL_NO_ENGINE + if (c->engine) + /* The EVP_CIPHER we used belongs to an ENGINE, release the + * functional reference we held for this reason. */ + do_engine_finish(c->engine); +#endif + memset(c,0,sizeof(EVP_CIPHER_CTX)); + return 1; + } + +int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) + { +#ifdef OPENSSL_FIPS + FIPS_selftest_check(); +#endif + return ctx->cipher->do_cipher(ctx,out,in,inl); + } + +int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) +{ + int ret; + if(!ctx->cipher) { + EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); + return 0; + } + + if(!ctx->cipher->ctrl) { + EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); + return 0; + } + + ret = ctx->cipher->ctrl(ctx, type, arg, ptr); + if(ret == -1) { + EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); + return 0; + } + return ret; +} + +unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) + { + return ctx->cipher->flags; + } + +int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) + { + return ctx->cipher->iv_len; + } + +int EVP_CIPHER_nid(const EVP_CIPHER *cipher) + { + return cipher->nid; + } |