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Restructured cipher_set_padding_mode() to use switch statement

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This commit is contained in:
Paul Bakker 2013-08-14 12:04:26 +02:00
parent ebdc413f44
commit 1a45d91cf2
2 changed files with 19 additions and 21 deletions
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6
include/polarssl/cipher.h
View File

@ -417,8 +417,10 @@ int cipher_setkey( cipher_context_t *ctx, const unsigned char *key, int key_leng
* \param ctx generic cipher context
* \param mode padding mode
*
* \returns 0 on success, POLARSSL_ERR_CIPHER_BAD_INPUT_DATA
* if parameters verification fails.
* \returns 0 on success, POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE
* if selected padding mode is not supported, or
* POLARSSL_ERR_CIPHER_BAD_INPUT_DATA if the cipher mode
* does not support padding.
*/
int cipher_set_padding_mode( cipher_context_t *ctx, cipher_padding_t mode );

34
library/cipher.c
View File

@ -747,42 +747,38 @@ int cipher_set_padding_mode( cipher_context_t *ctx, cipher_padding_t mode )
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
}
if( POLARSSL_PADDING_PKCS7 == mode )
switch( mode )
{
case POLARSSL_PADDING_PKCS7:
ctx->add_padding = add_pkcs_padding;
ctx->get_padding = get_pkcs_padding;
return 0;
}
break;
if( POLARSSL_PADDING_ONE_AND_ZEROS == mode )
{
case POLARSSL_PADDING_ONE_AND_ZEROS:
ctx->add_padding = add_one_and_zeros_padding;
ctx->get_padding = get_one_and_zeros_padding;
return 0;
}
break;
if( POLARSSL_PADDING_ZEROS_AND_LEN == mode )
{
case POLARSSL_PADDING_ZEROS_AND_LEN:
ctx->add_padding = add_zeros_and_len_padding;
ctx->get_padding = get_zeros_and_len_padding;
return 0;
}
break;
if( POLARSSL_PADDING_ZEROS == mode )
{
case POLARSSL_PADDING_ZEROS:
ctx->add_padding = add_zeros_padding;
ctx->get_padding = get_zeros_padding;
return 0;
}
break;
if( POLARSSL_PADDING_NONE == mode )
{
case POLARSSL_PADDING_NONE:
ctx->add_padding = NULL;
ctx->get_padding = get_no_padding;
return 0;
break;
default:
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
}
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
return 0;
}
#if defined(POLARSSL_SELF_TEST)