#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));
}
#ifdef OPENSSL_FIPS
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;}
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
impl = ENGINE_get_cipher_engine((*pcipher)->nid);
if(impl)
{
const EVP_CIPHER *c = ENGINE_get_cipher(impl, (*pcipher)->nid);
if(!c)
{
EVPerr(EVP_F_DO_EVP_ENC_ENGINE, EVP_R_INITIALIZATION_ERROR);
return 0;
}
*pcipher = c;
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
if (ctx->engine && ctx->cipher && (!cipher ||
(cipher && (cipher->nid == ctx->cipher->nid))))
goto skip_to_init;
#endif
if (cipher)
{
EVP_CIPHER_CTX_cleanup(ctx);
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
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
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;
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)
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;
}