+++ /dev/null
-/* crypto/evp/evp_enc.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>
-#ifndef OPENSSL_NO_ENGINE
-#include <openssl/engine.h>
-#endif
-#include "evp_locl.h"
-
-const char *EVP_version="EVP" OPENSSL_VERSION_PTEXT;
-
-void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
- {
- memset(ctx,0,sizeof(EVP_CIPHER_CTX));
- /* ctx->cipher=NULL; */
- }
-
-
-int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
- const unsigned char *key, const unsigned char *iv, int enc)
- {
- if (cipher)
- EVP_CIPHER_CTX_init(ctx);
- return EVP_CipherInit_ex(ctx,cipher,NULL,key,iv,enc);
- }
-
-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;
- }
-#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(impl)
- {
- if (!ENGINE_init(impl))
- {
- EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
- return 0;
- }
- }
- else
- /* Ask if an ENGINE is reserved for this job */
- impl = ENGINE_get_cipher_engine(cipher->nid);
- if(impl)
- {
- /* There's an ENGINE for this job ... (apparently) */
- const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->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_EVP_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
- return 0;
- }
- /* We'll use the ENGINE's private cipher definition */
- cipher = 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;
-#endif
-
- ctx->cipher=cipher;
- ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
- 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, EVP_R_INITIALIZATION_ERROR);
- return 0;
- }
- }
- }
- else if(!ctx->cipher)
- {
- EVPerr(EVP_F_EVP_CIPHERINIT, 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) <= 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;
- }
- }
-
- 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_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
- const unsigned char *in, int inl)
- {
- if (ctx->encrypt)
- return EVP_EncryptUpdate(ctx,out,outl,in,inl);
- else return EVP_DecryptUpdate(ctx,out,outl,in,inl);
- }
-
-int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
- {
- if (ctx->encrypt)
- return EVP_EncryptFinal_ex(ctx,out,outl);
- else return EVP_DecryptFinal_ex(ctx,out,outl);
- }
-
-int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
- {
- if (ctx->encrypt)
- return EVP_EncryptFinal(ctx,out,outl);
- else return EVP_DecryptFinal(ctx,out,outl);
- }
-
-int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
- const unsigned char *key, const unsigned char *iv)
- {
- return EVP_CipherInit(ctx, cipher, key, iv, 1);
- }
-
-int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
- const unsigned char *key, const unsigned char *iv)
- {
- return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
- }
-
-int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
- const unsigned char *key, const unsigned char *iv)
- {
- return EVP_CipherInit(ctx, cipher, key, iv, 0);
- }
-
-int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
- const unsigned char *key, const unsigned char *iv)
- {
- return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
- }
-
-int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
- const unsigned char *in, int inl)
- {
- int i,j,bl;
-
- OPENSSL_assert(inl > 0);
- if(ctx->buf_len == 0 && (inl&(ctx->block_mask)) == 0)
- {
- if(ctx->cipher->do_cipher(ctx,out,in,inl))
- {
- *outl=inl;
- return 1;
- }
- else
- {
- *outl=0;
- return 0;
- }
- }
- i=ctx->buf_len;
- bl=ctx->cipher->block_size;
- OPENSSL_assert(bl <= sizeof ctx->buf);
- if (i != 0)
- {
- if (i+inl < bl)
- {
- memcpy(&(ctx->buf[i]),in,inl);
- ctx->buf_len+=inl;
- *outl=0;
- return 1;
- }
- else
- {
- j=bl-i;
- memcpy(&(ctx->buf[i]),in,j);
- if(!ctx->cipher->do_cipher(ctx,out,ctx->buf,bl)) return 0;
- inl-=j;
- in+=j;
- out+=bl;
- *outl=bl;
- }
- }
- else
- *outl = 0;
- i=inl&(bl-1);
- inl-=i;
- if (inl > 0)
- {
- if(!ctx->cipher->do_cipher(ctx,out,in,inl)) return 0;
- *outl+=inl;
- }
-
- if (i != 0)
- memcpy(ctx->buf,&(in[inl]),i);
- ctx->buf_len=i;
- return 1;
- }
-
-int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
- {
- int ret;
- ret = EVP_EncryptFinal_ex(ctx, out, outl);
- return ret;
- }
-
-int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
- {
- int i,n,b,bl,ret;
-
- b=ctx->cipher->block_size;
- OPENSSL_assert(b <= sizeof ctx->buf);
- if (b == 1)
- {
- *outl=0;
- return 1;
- }
- bl=ctx->buf_len;
- if (ctx->flags & EVP_CIPH_NO_PADDING)
- {
- if(bl)
- {
- EVPerr(EVP_F_EVP_ENCRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
- return 0;
- }
- *outl = 0;
- return 1;
- }
-
- n=b-bl;
- for (i=bl; i<b; i++)
- ctx->buf[i]=n;
- ret=ctx->cipher->do_cipher(ctx,out,ctx->buf,b);
-
-
- if(ret)
- *outl=b;
-
- return ret;
- }
-
-int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
- const unsigned char *in, int inl)
- {
- int b, fix_len;
-
- if (inl == 0)
- {
- *outl=0;
- return 1;
- }
-
- if (ctx->flags & EVP_CIPH_NO_PADDING)
- return EVP_EncryptUpdate(ctx, out, outl, in, inl);
-
- b=ctx->cipher->block_size;
- OPENSSL_assert(b <= sizeof ctx->final);
-
- if(ctx->final_used)
- {
- memcpy(out,ctx->final,b);
- out+=b;
- fix_len = 1;
- }
- else
- fix_len = 0;
-
-
- if(!EVP_EncryptUpdate(ctx,out,outl,in,inl))
- return 0;
-
- /* if we have 'decrypted' a multiple of block size, make sure
- * we have a copy of this last block */
- if (b > 1 && !ctx->buf_len)
- {
- *outl-=b;
- ctx->final_used=1;
- memcpy(ctx->final,&out[*outl],b);
- }
- else
- ctx->final_used = 0;
-
- if (fix_len)
- *outl += b;
-
- return 1;
- }
-
-int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
- {
- int ret;
- ret = EVP_DecryptFinal_ex(ctx, out, outl);
- return ret;
- }
-
-int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
- {
- int i,b;
- int n;
-
- *outl=0;
- b=ctx->cipher->block_size;
- if (ctx->flags & EVP_CIPH_NO_PADDING)
- {
- if(ctx->buf_len)
- {
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
- return 0;
- }
- *outl = 0;
- return 1;
- }
- if (b > 1)
- {
- if (ctx->buf_len || !ctx->final_used)
- {
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_WRONG_FINAL_BLOCK_LENGTH);
- return(0);
- }
- OPENSSL_assert(b <= sizeof ctx->final);
- n=ctx->final[b-1];
- if (n > b)
- {
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
- return(0);
- }
- for (i=0; i<n; i++)
- {
- if (ctx->final[--b] != n)
- {
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
- return(0);
- }
- }
- n=ctx->cipher->block_size-n;
- for (i=0; i<n; i++)
- out[i]=ctx->final[i];
- *outl=n;
- }
- else
- *outl=0;
- 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. */
- ENGINE_finish(c->engine);
-#endif
- memset(c,0,sizeof(EVP_CIPHER_CTX));
- return 1;
- }
-
-int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
- {
- if(c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
- return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
- if(c->key_len == keylen) return 1;
- if((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH))
- {
- c->key_len = keylen;
- return 1;
- }
- EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH,EVP_R_INVALID_KEY_LENGTH);
- return 0;
- }
-
-int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
- {
- if (pad) ctx->flags &= ~EVP_CIPH_NO_PADDING;
- else ctx->flags |= EVP_CIPH_NO_PADDING;
- return 1;
- }
-
-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;
-}
projects / bcm963xx.git / blobdiff