diff options
Diffstat (limited to 'openssl/crypto/evp/evp_enc.c')
| -rw-r--r-- | openssl/crypto/evp/evp_enc.c | 604 |
1 files changed, 0 insertions, 604 deletions
diff --git a/openssl/crypto/evp/evp_enc.c b/openssl/crypto/evp/evp_enc.c deleted file mode 100644 index c268d25c..00000000 --- a/openssl/crypto/evp/evp_enc.c +++ /dev/null @@ -1,604 +0,0 @@ -/* 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> -#include <openssl/rand.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; */ - } - -EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) - { - EVP_CIPHER_CTX *ctx=OPENSSL_malloc(sizeof *ctx); - if (ctx) - EVP_CIPHER_CTX_init(ctx); - return ctx; - } - -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_EX, 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_EX, 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; - 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; - /* fall-through */ - - 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; - } - } - - 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; - - if (inl <= 0) - { - *outl = 0; - return 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 <= (int)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 n,ret; - unsigned int i, b, bl; - - 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_EX,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 fix_len; - unsigned int b; - - if (inl <= 0) - { - *outl = 0; - return inl == 0; - } - - 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,n; - unsigned int b; - - *outl=0; - b=ctx->cipher->block_size; - if (ctx->flags & EVP_CIPH_NO_PADDING) - { - if(ctx->buf_len) - { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,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_EX,EVP_R_WRONG_FINAL_BLOCK_LENGTH); - return(0); - } - OPENSSL_assert(b <= sizeof ctx->final); - n=ctx->final[b-1]; - if (n == 0 || n > (int)b) - { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_BAD_DECRYPT); - return(0); - } - for (i=0; i<n; i++) - { - if (ctx->final[--b] != n) - { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,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); - } - -void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) - { - if (ctx) - { - EVP_CIPHER_CTX_cleanup(ctx); - OPENSSL_free(ctx); - } - } - -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; -} - -int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) - { - if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) - return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); - if (RAND_bytes(key, ctx->key_len) <= 0) - return 0; - return 1; - } - -int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) - { - if ((in == NULL) || (in->cipher == NULL)) - { - EVPerr(EVP_F_EVP_CIPHER_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED); - return 0; - } -#ifndef OPENSSL_NO_ENGINE - /* Make sure it's safe to copy a cipher context using an ENGINE */ - if (in->engine && !ENGINE_init(in->engine)) - { - EVPerr(EVP_F_EVP_CIPHER_CTX_COPY,ERR_R_ENGINE_LIB); - return 0; - } -#endif - - EVP_CIPHER_CTX_cleanup(out); - memcpy(out,in,sizeof *out); - - if (in->cipher_data && in->cipher->ctx_size) - { - out->cipher_data=OPENSSL_malloc(in->cipher->ctx_size); - if (!out->cipher_data) - { - EVPerr(EVP_F_EVP_CIPHER_CTX_COPY,ERR_R_MALLOC_FAILURE); - return 0; - } - memcpy(out->cipher_data,in->cipher_data,in->cipher->ctx_size); - } - - if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) - return in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out); - return 1; - } - |