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https://github.com/yuzu-emu/mbedtls
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Added cipher_info_from_values() to cipher layer (Search by ID+keylen+mode)
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Paul Bakker
parent
5e0efa7ef5
commit
f46b6955e3
2 changed files with 195 additions and 0 deletions
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@ -285,6 +285,22 @@ const cipher_info_t *cipher_info_from_string( const char *cipher_name );
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*/
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const cipher_info_t *cipher_info_from_type( const cipher_type_t cipher_type );
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/**
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* \brief Returns the cipher information structure associated
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* with the given cipher id, key size and mode.
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*
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* \param cipher_id Id of the cipher to search for
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* (e.g. POLARSSL_CIPHER_ID_AES)
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* \param key_length Length of the key in bits
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* \param mode Cipher mode (e.g. POLARSSL_MODE_CBC)
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*
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* \return the cipher information structure associated with the
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* given cipher_type, or NULL if not found.
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*/
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const cipher_info_t *cipher_info_from_values( const cipher_id_t cipher_id,
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int key_length,
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const cipher_mode_t mode );
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/**
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* \brief Initialises and fills the cipher context structure with
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* the appropriate values.
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179
library/cipher.c
179
library/cipher.c
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@ -379,6 +379,185 @@ const cipher_info_t *cipher_info_from_string( const char *cipher_name )
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return NULL;
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}
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const cipher_info_t *cipher_info_from_values( const cipher_id_t cipher_id,
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int key_length,
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const cipher_mode_t mode )
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{
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#if defined(POLARSSL_AES_C)
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if( cipher_id == POLARSSL_CIPHER_ID_AES )
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{
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if( mode == POLARSSL_MODE_ECB )
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{
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if( key_length == 128 )
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return &aes_128_ecb_info;
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if( key_length == 192 )
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return &aes_192_ecb_info;
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if( key_length == 256 )
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return &aes_256_ecb_info;
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}
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if( mode == POLARSSL_MODE_CBC )
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{
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if( key_length == 128 )
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return &aes_128_cbc_info;
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if( key_length == 192 )
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return &aes_192_cbc_info;
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if( key_length == 256 )
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return &aes_256_cbc_info;
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}
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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if( mode == POLARSSL_MODE_CFB )
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{
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if( key_length == 128 )
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return &aes_128_cfb128_info;
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if( key_length == 192 )
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return &aes_192_cfb128_info;
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if( key_length == 256 )
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return &aes_256_cfb128_info;
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}
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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if( mode == POLARSSL_MODE_CTR )
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{
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if( key_length == 128 )
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return &aes_128_ctr_info;
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if( key_length == 192 )
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return &aes_192_ctr_info;
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if( key_length == 256 )
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return &aes_256_ctr_info;
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}
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#if defined(POLARSSL_GCM_C)
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if( mode == POLARSSL_MODE_GCM )
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{
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if( key_length == 128 )
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return &aes_128_gcm_info;
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if( key_length == 192 )
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return &aes_192_gcm_info;
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if( key_length == 256 )
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return &aes_256_gcm_info;
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}
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#endif /* defined(POLARSSL_GCM_C) */
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}
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#endif
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#if defined(POLARSSL_CAMELLIA_C)
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if( cipher_id == POLARSSL_CIPHER_ID_CAMELLIA )
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{
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if( mode == POLARSSL_MODE_ECB )
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{
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if( key_length == 128 )
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return &camellia_128_ecb_info;
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if( key_length == 192 )
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return &camellia_192_ecb_info;
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if( key_length == 256 )
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return &camellia_256_ecb_info;
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}
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if( mode == POLARSSL_MODE_CBC )
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{
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if( key_length == 128 )
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return &camellia_128_cbc_info;
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if( key_length == 192 )
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return &camellia_192_cbc_info;
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if( key_length == 256 )
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return &camellia_256_cbc_info;
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}
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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if( mode == POLARSSL_MODE_CFB )
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{
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if( key_length == 128 )
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return &camellia_128_cfb128_info;
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if( key_length == 192 )
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return &camellia_192_cfb128_info;
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if( key_length == 256 )
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return &camellia_256_cfb128_info;
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}
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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if( mode == POLARSSL_MODE_CTR )
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{
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if( key_length == 128 )
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return &camellia_128_ctr_info;
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if( key_length == 192 )
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return &camellia_192_ctr_info;
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if( key_length == 256 )
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return &camellia_256_ctr_info;
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}
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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}
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#endif
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#if defined(POLARSSL_DES_C)
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if( cipher_id == POLARSSL_CIPHER_ID_DES )
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{
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if( mode == POLARSSL_MODE_ECB )
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return &des_ecb_info;
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if( mode == POLARSSL_MODE_CBC )
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return &des_cbc_info;
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}
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if( cipher_id == POLARSSL_CIPHER_ID_3DES )
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{
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if( mode == POLARSSL_MODE_ECB )
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{
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if( key_length == 128 )
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return &des_ede_ecb_info;
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if( key_length == 192 )
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return &des_ede3_ecb_info;
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}
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if( mode == POLARSSL_MODE_CBC )
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{
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if( key_length == 128 )
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return &des_ede_cbc_info;
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if( key_length == 192 )
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return &des_ede3_cbc_info;
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}
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}
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#endif
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#if defined(POLARSSL_ARC4_C)
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if( cipher_id == POLARSSL_CIPHER_ID_ARC4 )
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if( mode == POLARSSL_MODE_STREAM )
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return &arc4_128_info;
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#endif
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#if defined(POLARSSL_BLOWFISH_C)
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if( cipher_id == POLARSSL_CIPHER_ID_BLOWFISH )
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{
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if( mode == POLARSSL_MODE_ECB )
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return &blowfish_ecb_info;
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if( mode == POLARSSL_MODE_CBC )
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return &blowfish_cbc_info;
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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if( mode == POLARSSL_MODE_CFB )
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return &blowfish_cfb64_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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if( mode == POLARSSL_MODE_CTR )
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return &blowfish_ctr_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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}
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#endif
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#if defined(POLARSSL_CIPHER_NULL_CIPHER)
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if( cipher_id == POLARSSL_CIPHER_ID_NULL )
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return &null_cipher_info;
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#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
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return NULL;
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}
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int cipher_init_ctx( cipher_context_t *ctx, const cipher_info_t *cipher_info )
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{
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if( NULL == cipher_info || NULL == ctx )
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