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Add ChaCha20 to the Cipher module

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This commit is contained in:
Daniel King 2016-05-15 19:56:20 -03:00 • committed by Manuel Pégourié-Gonnard
parent 34b822ce7b
commit bd92062269
8 changed files with 231 additions and 4 deletions
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31
library/cipher.c
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@ -46,6 +46,10 @@
#include "mbedtls/ccm.h"
#endif
#if defined(MBEDTLS_CHACHA20_C)
#include "mbedtls/chacha20.h"
#endif
#if defined(MBEDTLS_CMAC_C)
#include "mbedtls/cmac.h"
#endif
@ -231,6 +235,18 @@ int mbedtls_cipher_set_iv( mbedtls_cipher_context_t *ctx,
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
}
#if defined(MBEDTLS_CHACHA20_C)
if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20 )
{
if ( 0 != mbedtls_chacha20_starts( (mbedtls_chacha20_context*)ctx->cipher_ctx,
iv,
0U ) ) /* Initial counter value */
{
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
}
}
#endif
memcpy( ctx->iv, iv, actual_iv_size );
ctx->iv_size = actual_iv_size;
@ -314,6 +330,16 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
}
#if defined(MBEDTLS_CHACHA20_C)
if ( ctx->cipher_info->type == MBEDTLS_CIPHER_CHACHA20 )
{
*olen = ilen;
return mbedtls_chacha20_update( (mbedtls_chacha20_context*) ctx->cipher_ctx,
ilen, input, output );
}
#endif
#if defined(MBEDTLS_CIPHER_MODE_CBC)
if( ctx->cipher_info->mode == MBEDTLS_MODE_CBC )
{
@ -646,6 +672,11 @@ int mbedtls_cipher_finish( mbedtls_cipher_context_t *ctx,
return( 0 );
}
if ( MBEDTLS_CIPHER_CHACHA20 == ctx->cipher_info->type )
{
return( 0 );
}
if( MBEDTLS_MODE_ECB == ctx->cipher_info->mode )
{
if( ctx->unprocessed_len != 0 )