lilcrypto/cipher.c

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/*
* Copyright (c) 2024 Lucas Gabriel Vuotto <lucas@lgv5.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include "lilcrypto.h"
#include "cipher.h"
int
lc_cipher_encrypt_init(struct lc_cipher_ctx *ctx, const uint8_t *key,
size_t keylen, const uint8_t *iv, size_t ivlen)
{
return ctx->impl->encrypt_init(ctx->arg, key, keylen, iv, ivlen);
}
int
lc_cipher_encrypt_update(struct lc_cipher_ctx *ctx, uint8_t *out,
size_t *outlen, const uint8_t *in, size_t inlen)
{
return ctx->impl->encrypt_update(ctx->arg, out, outlen, in, inlen);
}
int
lc_cipher_encrypt_final(struct lc_cipher_ctx *ctx, uint8_t *out,
size_t *outlen)
{
return ctx->impl->encrypt_final(ctx->arg, out, outlen);
}
int
lc_cipher_encrypt(const struct lc_cipher_impl *impl, const uint8_t *key,
size_t keylen, const uint8_t *iv, size_t ivlen, uint8_t *out,
size_t *outlen, const uint8_t *in, size_t inlen)
{
return impl->encrypt(key, keylen, iv, ivlen, out, outlen, in, inlen);
}
int
lc_cipher_decrypt_init(struct lc_cipher_ctx *ctx, const uint8_t *key,
size_t keylen, const uint8_t *iv, size_t ivlen)
{
return ctx->impl->decrypt_init(ctx->arg, key, keylen, iv, ivlen);
}
int
lc_cipher_decrypt_update(struct lc_cipher_ctx *ctx, uint8_t *out,
size_t *outlen, const uint8_t *in, size_t inlen)
{
return ctx->impl->decrypt_update(ctx->arg, out, outlen, in, inlen);
}
int
lc_cipher_decrypt_final(struct lc_cipher_ctx *ctx, uint8_t *out,
size_t *outlen)
{
return ctx->impl->decrypt_final(ctx->arg, out, outlen);
}
int
lc_cipher_decrypt(const struct lc_cipher_impl *impl, const uint8_t *key,
size_t keylen, const uint8_t *iv, size_t ivlen, uint8_t *out,
size_t *outlen, const uint8_t *in, size_t inlen)
{
return impl->decrypt(key, keylen, iv, ivlen, out, outlen, in, inlen);
}
struct lc_cipher_ctx *
lc_cipher_ctx_new(const struct lc_cipher_impl *impl)
{
struct lc_cipher_ctx *ctx;
ctx = malloc(sizeof(*ctx));
if (ctx == NULL)
return NULL;
if (impl->ctx_new != NULL) {
ctx->arg = impl->ctx_new(NULL);
if (ctx->arg == NULL) {
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free(ctx);
return NULL;
}
} else
ctx->arg = NULL;
ctx->impl = impl;
return ctx;
}
void
lc_cipher_ctx_free(struct lc_cipher_ctx *ctx)
{
if (ctx != NULL && ctx->impl != NULL && ctx->impl->ctx_free != NULL)
ctx->impl->ctx_free(ctx);
else {
if (ctx != NULL)
free(ctx->arg);
free(ctx);
}
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}