lib/mbedtls
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Split mbedtls_gcm_init() -> gcm_setkey()

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This commit is contained in:
Manuel Pégourié-Gonnard
2015-04-28 21:42:17 +02:00
parent 6963ff0969
commit c34e8dd265
6 changed files with 43 additions and 13 deletions
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4
library/cipher_wrap.c
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@@ -332,7 +332,7 @@ static const mbedtls_cipher_info_t aes_256_ctr_info = {
static int gcm_aes_setkey_wrap( void *ctx, const unsigned char *key,
unsigned int key_length )
{
return mbedtls_gcm_init( (mbedtls_gcm_context *) ctx, MBEDTLS_CIPHER_ID_AES,
return mbedtls_gcm_setkey( (mbedtls_gcm_context *) ctx, MBEDTLS_CIPHER_ID_AES,
key, key_length );
}
@@ -689,7 +689,7 @@ static const mbedtls_cipher_info_t camellia_256_ctr_info = {
static int gcm_camellia_setkey_wrap( void *ctx, const unsigned char *key,
unsigned int key_length )
{
return mbedtls_gcm_init( (mbedtls_gcm_context *) ctx, MBEDTLS_CIPHER_ID_CAMELLIA,
return mbedtls_gcm_setkey( (mbedtls_gcm_context *) ctx, MBEDTLS_CIPHER_ID_CAMELLIA,
key, key_length );
}

24
library/gcm.c
View File

@@ -83,6 +83,14 @@ static void mbedtls_zeroize( void *v, size_t n ) {
volatile unsigned char *p = v; while( n-- ) *p++ = 0;
}
/*
* Initialize a context
*/
void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
{
memset( ctx, 0, sizeof( mbedtls_gcm_context ) );
}
/*
* Precompute small multiples of H, that is set
* HH[i] || HL[i] = H times i,
@@ -151,8 +159,10 @@ static int gcm_gen_table( mbedtls_gcm_context *ctx )
return( 0 );
}
int mbedtls_gcm_init( mbedtls_gcm_context *ctx, mbedtls_cipher_id_t cipher, const unsigned char *key,
unsigned int keysize )
int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
mbedtls_cipher_id_t cipher,
const unsigned char *key,
unsigned int keysize )
{
int ret;
const mbedtls_cipher_info_t *cipher_info;
@@ -736,6 +746,8 @@ int mbedtls_gcm_self_test( int verbose )
int i, j, ret;
mbedtls_cipher_id_t cipher = MBEDTLS_CIPHER_ID_AES;
mbedtls_gcm_init( &ctx );
for( j = 0; j < 3; j++ )
{
int key_len = 128 + 64 * j;
@@ -746,7 +758,7 @@ int mbedtls_gcm_self_test( int verbose )
mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
key_len, i, "enc" );
mbedtls_gcm_init( &ctx, cipher, key[key_index[i]], key_len );
mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_ENCRYPT,
pt_len[i],
@@ -773,7 +785,7 @@ int mbedtls_gcm_self_test( int verbose )
mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
key_len, i, "dec" );
mbedtls_gcm_init( &ctx, cipher, key[key_index[i]], key_len );
mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_DECRYPT,
pt_len[i],
@@ -800,7 +812,7 @@ int mbedtls_gcm_self_test( int verbose )
mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
key_len, i, "enc" );
mbedtls_gcm_init( &ctx, cipher, key[key_index[i]], key_len );
mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_ENCRYPT,
iv[iv_index[i]], iv_len[i],
@@ -867,7 +879,7 @@ int mbedtls_gcm_self_test( int verbose )
mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
key_len, i, "dec" );
mbedtls_gcm_init( &ctx, cipher, key[key_index[i]], key_len );
mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_DECRYPT,
iv[iv_index[i]], iv_len[i],