90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/**
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* \file block_cipher.c
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*
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* \brief Lightweight abstraction layer for block ciphers with 128 bit blocks,
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* for use by the GCM and CCM modules.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*/
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#include "common.h"
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#include "block_cipher_internal.h"
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#if defined(MBEDTLS_BLOCK_CIPHER_C)
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void mbedtls_block_cipher_free(mbedtls_block_cipher_context_t *ctx)
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{
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switch (ctx->id) {
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#if defined(MBEDTLS_AES_C)
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case MBEDTLS_BLOCK_CIPHER_ID_AES:
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mbedtls_aes_free(&ctx->ctx.aes);
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break;
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#endif
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#if defined(MBEDTLS_ARIA_C)
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case MBEDTLS_BLOCK_CIPHER_ID_ARIA:
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mbedtls_aria_free(&ctx->ctx.aria);
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break;
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#endif
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#if defined(MBEDTLS_CAMELLIA_C)
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case MBEDTLS_BLOCK_CIPHER_ID_CAMELLIA:
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mbedtls_camellia_free(&ctx->ctx.camellia);
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break;
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#endif
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default:
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break;
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}
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ctx->id = MBEDTLS_BLOCK_CIPHER_ID_NONE;
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}
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int mbedtls_block_cipher_setup(mbedtls_block_cipher_context_t *ctx,
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mbedtls_cipher_id_t cipher_id)
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{
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switch (cipher_id) {
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#if defined(MBEDTLS_AES_C)
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case MBEDTLS_CIPHER_ID_AES:
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ctx->id = MBEDTLS_BLOCK_CIPHER_ID_AES;
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mbedtls_aes_init(&ctx->ctx.aes);
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return 0;
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#endif
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#if defined(MBEDTLS_ARIA_C)
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case MBEDTLS_CIPHER_ID_ARIA:
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ctx->id = MBEDTLS_BLOCK_CIPHER_ID_ARIA;
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mbedtls_aria_init(&ctx->ctx.aria);
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return 0;
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#endif
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#if defined(MBEDTLS_CAMELLIA_C)
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case MBEDTLS_CIPHER_ID_CAMELLIA:
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ctx->id = MBEDTLS_BLOCK_CIPHER_ID_CAMELLIA;
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mbedtls_camellia_init(&ctx->ctx.camellia);
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return 0;
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#endif
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default:
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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}
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int mbedtls_block_cipher_setkey(mbedtls_block_cipher_context_t *ctx,
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const unsigned char *key,
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unsigned key_bitlen)
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{
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switch (ctx->id) {
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#if defined(MBEDTLS_AES_C)
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case MBEDTLS_BLOCK_CIPHER_ID_AES:
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return mbedtls_aes_setkey_enc(&ctx->ctx.aes, key, key_bitlen);
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#endif
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#if defined(MBEDTLS_ARIA_C)
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case MBEDTLS_BLOCK_CIPHER_ID_ARIA:
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return mbedtls_aria_setkey_enc(&ctx->ctx.aria, key, key_bitlen);
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#endif
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#if defined(MBEDTLS_CAMELLIA_C)
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case MBEDTLS_BLOCK_CIPHER_ID_CAMELLIA:
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return mbedtls_camellia_setkey_enc(&ctx->ctx.camellia, key, key_bitlen);
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#endif
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default:
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return MBEDTLS_ERR_CIPHER_INVALID_CONTEXT;
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}
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}
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#endif /* MBEDTLS_BLOCK_CIPHER_C */
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