#include <limits.h>
#include <stdio.h>
#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_CAST
#include <openssl/cast.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include "evp_local.h"
typedef struct {
CAST_KEY ks;
} EVP_CAST_KEY;
#define data(ctx) ((EVP_CAST_KEY *)(ctx)->cipher_data)
static int
cast_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
CAST_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), key);
return 1;
}
static int
cast5_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl)
{
size_t chunk = LONG_MAX & ~0xff;
while (inl >= chunk) {
CAST_cbc_encrypt(in, out, (long)chunk, &((EVP_CAST_KEY *)ctx->cipher_data)->ks, ctx->iv, ctx->encrypt);
inl -= chunk;
in += chunk;
out += chunk;
}
if (inl)
CAST_cbc_encrypt(in, out, (long)inl, &((EVP_CAST_KEY *)ctx->cipher_data)->ks, ctx->iv, ctx->encrypt);
return 1;
}
static int
cast5_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl)
{
size_t chunk = LONG_MAX & ~0xff;
if (inl < chunk)
chunk = inl;
while (inl && inl >= chunk) {
CAST_cfb64_encrypt(in, out, (long)chunk, &((EVP_CAST_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num, ctx->encrypt);
inl -= chunk;
in += chunk;
out += chunk;
if (inl < chunk)
chunk = inl;
}
return 1;
}
static int
cast5_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl)
{
size_t i, bl;
bl = ctx->cipher->block_size;
if (inl < bl)
return 1;
inl -= bl;
for (i = 0; i <= inl; i += bl)
CAST_ecb_encrypt(in + i, out + i, &((EVP_CAST_KEY *)ctx->cipher_data)->ks, ctx->encrypt);
return 1;
}
static int
cast5_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl)
{
size_t chunk = LONG_MAX & ~0xff;
while (inl >= chunk) {
CAST_ofb64_encrypt(in, out, (long)chunk, &((EVP_CAST_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num);
inl -= chunk;
in += chunk;
out += chunk;
}
if (inl)
CAST_ofb64_encrypt(in, out, (long)inl, &((EVP_CAST_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num);
return 1;
}
static const EVP_CIPHER cast5_cbc = {
.nid = NID_cast5_cbc,
.block_size = 8,
.key_len = CAST_KEY_LENGTH,
.iv_len = 8,
.flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CBC_MODE |
EVP_CIPH_FLAG_DEFAULT_ASN1,
.init = cast_init_key,
.do_cipher = cast5_cbc_cipher,
.cleanup = NULL,
.ctx_size = sizeof(EVP_CAST_KEY),
.set_asn1_parameters = NULL,
.get_asn1_parameters = NULL,
.ctrl = NULL,
};
const EVP_CIPHER *
EVP_cast5_cbc(void)
{
return &cast5_cbc;
}
LCRYPTO_ALIAS(EVP_cast5_cbc);
static const EVP_CIPHER cast5_cfb64 = {
.nid = NID_cast5_cfb64,
.block_size = 1,
.key_len = CAST_KEY_LENGTH,
.iv_len = 8,
.flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CFB_MODE |
EVP_CIPH_FLAG_DEFAULT_ASN1,
.init = cast_init_key,
.do_cipher = cast5_cfb64_cipher,
.cleanup = NULL,
.ctx_size = sizeof(EVP_CAST_KEY),
.set_asn1_parameters = NULL,
.get_asn1_parameters = NULL,
.ctrl = NULL,
};
const EVP_CIPHER *
EVP_cast5_cfb64(void)
{
return &cast5_cfb64;
}
LCRYPTO_ALIAS(EVP_cast5_cfb64);
static const EVP_CIPHER cast5_ofb = {
.nid = NID_cast5_ofb64,
.block_size = 1,
.key_len = CAST_KEY_LENGTH,
.iv_len = 8,
.flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_OFB_MODE |
EVP_CIPH_FLAG_DEFAULT_ASN1,
.init = cast_init_key,
.do_cipher = cast5_ofb_cipher,
.cleanup = NULL,
.ctx_size = sizeof(EVP_CAST_KEY),
.set_asn1_parameters = NULL,
.get_asn1_parameters = NULL,
.ctrl = NULL,
};
const EVP_CIPHER *
EVP_cast5_ofb(void)
{
return &cast5_ofb;
}
LCRYPTO_ALIAS(EVP_cast5_ofb);
static const EVP_CIPHER cast5_ecb = {
.nid = NID_cast5_ecb,
.block_size = 8,
.key_len = CAST_KEY_LENGTH,
.iv_len = 0,
.flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_ECB_MODE |
EVP_CIPH_FLAG_DEFAULT_ASN1,
.init = cast_init_key,
.do_cipher = cast5_ecb_cipher,
.cleanup = NULL,
.ctx_size = sizeof(EVP_CAST_KEY),
.set_asn1_parameters = NULL,
.get_asn1_parameters = NULL,
.ctrl = NULL,
};
const EVP_CIPHER *
EVP_cast5_ecb(void)
{
return &cast5_ecb;
}
LCRYPTO_ALIAS(EVP_cast5_ecb);
#endif
