Lucas Gabriel Vuotto
623dd16dc2
This allows for more flexibility in the future. While at it, do note that the RFC and draft implementations are followed. In particular, in XChaCha20, hardcode the high word of the counter to 0. This commit breaks ChaCha20-Poly1305. It'll be fixed in a subsequent commit. stash
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
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* Copyright (c) 2024 Lucas Gabriel Vuotto <lucas@lgv5.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdlib.h>
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#include "lilcrypto.h"
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#include "cipher.h"
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int
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lc_cipher_encrypt_init(struct lc_cipher_ctx *ctx, const void *initparams)
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{
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return ctx->impl->encrypt_init(ctx->arg, initparams);
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}
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int
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lc_cipher_encrypt_update(struct lc_cipher_ctx *ctx, uint8_t *out,
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size_t *outlen, const uint8_t *in, size_t inlen)
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{
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return ctx->impl->encrypt_update(ctx->arg, out, outlen, in, inlen);
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}
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int
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lc_cipher_encrypt_final(struct lc_cipher_ctx *ctx, uint8_t *out,
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size_t *outlen)
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{
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return ctx->impl->encrypt_final(ctx->arg, out, outlen);
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}
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int
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lc_cipher_encrypt(const struct lc_cipher_impl *impl, uint8_t *out,
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size_t *outlen, const void *initparams, const uint8_t *in, size_t inlen)
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{
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return impl->encrypt(out, outlen, initparams, in, inlen);
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}
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int
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lc_cipher_decrypt_init(struct lc_cipher_ctx *ctx, const void *initparams)
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{
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return ctx->impl->decrypt_init(ctx->arg, initparams);
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}
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int
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lc_cipher_decrypt_update(struct lc_cipher_ctx *ctx, uint8_t *out,
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size_t *outlen, const uint8_t *in, size_t inlen)
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{
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return ctx->impl->decrypt_update(ctx->arg, out, outlen, in, inlen);
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}
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int
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lc_cipher_decrypt_final(struct lc_cipher_ctx *ctx, uint8_t *out,
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size_t *outlen)
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{
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return ctx->impl->decrypt_final(ctx->arg, out, outlen);
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}
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int
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lc_cipher_decrypt(const struct lc_cipher_impl *impl, uint8_t *out,
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size_t *outlen, const void *initparams, const uint8_t *in, size_t inlen)
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{
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return impl->decrypt(out, outlen, initparams, in, inlen);
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}
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struct lc_cipher_ctx *
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lc_cipher_ctx_new(const struct lc_cipher_impl *impl)
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{
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struct lc_cipher_ctx *ctx;
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ctx = malloc(sizeof(*ctx));
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if (ctx == NULL)
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return NULL;
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if (impl->ctx_new != NULL) {
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ctx->arg = impl->ctx_new();
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if (ctx->arg == NULL) {
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free(ctx);
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return NULL;
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}
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} else
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ctx->arg = NULL;
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ctx->impl = impl;
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return ctx;
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}
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void
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lc_cipher_ctx_free(struct lc_cipher_ctx *ctx)
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{
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if (ctx != NULL) {
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if (ctx->impl != NULL && ctx->impl->ctx_free != NULL)
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ctx->impl->ctx_free(ctx->arg);
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free(ctx->arg);
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}
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free(ctx);
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}
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