Add mbedtls_md_clone()

parent 16d412f4
......@@ -163,6 +163,23 @@ int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_
*/
int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac );
/**
* \brief Clone the state of an MD context
*
* \note The two contexts must have been setup to the same type
* (cloning from SHA-256 to SHA-512 make no sense).
*
* \warning Only clones the MD state, not the HMAC state! (for now)
*
* \param dst The destination context
* \param src The context to be cloned
*
* \return \c 0 on success,
* \c MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter failure.
*/
int mbedtls_md_clone( mbedtls_md_context_t *dst,
const mbedtls_md_context_t *src );
/**
* \brief Returns the size of the message digest output.
*
......
......@@ -77,6 +77,9 @@ struct mbedtls_md_info_t
/** Free the given context */
void (*ctx_free_func)( void *ctx );
/** Clone state from a context */
void (*clone_func)( void *dst, const void *src );
/** Internal use only */
void (*process_func)( void *ctx, const unsigned char *input );
};
......
......@@ -201,6 +201,21 @@ void mbedtls_md_free( mbedtls_md_context_t *ctx )
mbedtls_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
}
int mbedtls_md_clone( mbedtls_md_context_t *dst,
const mbedtls_md_context_t *src )
{
if( dst == NULL || dst->md_info == NULL ||
src == NULL || src->md_info == NULL ||
dst->md_info != src->md_info )
{
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
}
dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
return( 0 );
}
#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info )
{
......
......@@ -104,6 +104,12 @@ static void md2_ctx_free( void *ctx )
mbedtls_free( ctx );
}
static void md2_clone_wrap( void *dst, const void *src )
{
mbedtls_md2_clone( (mbedtls_md2_context *) dst,
(const mbedtls_md2_context *) src );
}
static void md2_process_wrap( void *ctx, const unsigned char *data )
{
((void) data);
......@@ -122,6 +128,7 @@ const mbedtls_md_info_t mbedtls_md2_info = {
mbedtls_md2,
md2_ctx_alloc,
md2_ctx_free,
md2_clone_wrap,
md2_process_wrap,
};
......@@ -161,6 +168,12 @@ static void md4_ctx_free( void *ctx )
mbedtls_free( ctx );
}
static void md4_clone_wrap( void *dst, const void *src )
{
mbedtls_md4_clone( (mbedtls_md4_context *) dst,
(const mbedtls_md4_context *) src );
}
static void md4_process_wrap( void *ctx, const unsigned char *data )
{
mbedtls_md4_process( (mbedtls_md4_context *) ctx, data );
......@@ -177,6 +190,7 @@ const mbedtls_md_info_t mbedtls_md4_info = {
mbedtls_md4,
md4_ctx_alloc,
md4_ctx_free,
md4_clone_wrap,
md4_process_wrap,
};
......@@ -216,6 +230,12 @@ static void md5_ctx_free( void *ctx )
mbedtls_free( ctx );
}
static void md5_clone_wrap( void *dst, const void *src )
{
mbedtls_md5_clone( (mbedtls_md5_context *) dst,
(const mbedtls_md5_context *) src );
}
static void md5_process_wrap( void *ctx, const unsigned char *data )
{
mbedtls_md5_process( (mbedtls_md5_context *) ctx, data );
......@@ -232,6 +252,7 @@ const mbedtls_md_info_t mbedtls_md5_info = {
mbedtls_md5,
md5_ctx_alloc,
md5_ctx_free,
md5_clone_wrap,
md5_process_wrap,
};
......@@ -271,6 +292,12 @@ static void ripemd160_ctx_free( void *ctx )
mbedtls_free( ctx );
}
static void ripemd160_clone_wrap( void *dst, const void *src )
{
mbedtls_ripemd160_clone( (mbedtls_ripemd160_context *) dst,
(const mbedtls_ripemd160_context *) src );
}
static void ripemd160_process_wrap( void *ctx, const unsigned char *data )
{
mbedtls_ripemd160_process( (mbedtls_ripemd160_context *) ctx, data );
......@@ -287,6 +314,7 @@ const mbedtls_md_info_t mbedtls_ripemd160_info = {
mbedtls_ripemd160,
ripemd160_ctx_alloc,
ripemd160_ctx_free,
ripemd160_clone_wrap,
ripemd160_process_wrap,
};
......@@ -320,6 +348,12 @@ static void *sha1_ctx_alloc( void )
return( ctx );
}
static void sha1_clone_wrap( void *dst, const void *src )
{
mbedtls_sha1_clone( (mbedtls_sha1_context *) dst,
(const mbedtls_sha1_context *) src );
}
static void sha1_ctx_free( void *ctx )
{
mbedtls_sha1_free( (mbedtls_sha1_context *) ctx );
......@@ -342,6 +376,7 @@ const mbedtls_md_info_t mbedtls_sha1_info = {
mbedtls_sha1,
sha1_ctx_alloc,
sha1_ctx_free,
sha1_clone_wrap,
sha1_process_wrap,
};
......@@ -390,6 +425,12 @@ static void sha224_ctx_free( void *ctx )
mbedtls_free( ctx );
}
static void sha224_clone_wrap( void *dst, const void *src )
{
mbedtls_sha256_clone( (mbedtls_sha256_context *) dst,
(const mbedtls_sha256_context *) src );
}
static void sha224_process_wrap( void *ctx, const unsigned char *data )
{
mbedtls_sha256_process( (mbedtls_sha256_context *) ctx, data );
......@@ -406,6 +447,7 @@ const mbedtls_md_info_t mbedtls_sha224_info = {
sha224_wrap,
sha224_ctx_alloc,
sha224_ctx_free,
sha224_clone_wrap,
sha224_process_wrap,
};
......@@ -431,6 +473,7 @@ const mbedtls_md_info_t mbedtls_sha256_info = {
sha256_wrap,
sha224_ctx_alloc,
sha224_ctx_free,
sha224_clone_wrap,
sha224_process_wrap,
};
......@@ -476,6 +519,12 @@ static void sha384_ctx_free( void *ctx )
mbedtls_free( ctx );
}
static void sha384_clone_wrap( void *dst, const void *src )
{
mbedtls_sha512_clone( (mbedtls_sha512_context *) dst,
(const mbedtls_sha512_context *) src );
}
static void sha384_process_wrap( void *ctx, const unsigned char *data )
{
mbedtls_sha512_process( (mbedtls_sha512_context *) ctx, data );
......@@ -492,6 +541,7 @@ const mbedtls_md_info_t mbedtls_sha384_info = {
sha384_wrap,
sha384_ctx_alloc,
sha384_ctx_free,
sha384_clone_wrap,
sha384_process_wrap,
};
......@@ -517,6 +567,7 @@ const mbedtls_md_info_t mbedtls_sha512_info = {
sha512_wrap,
sha384_ctx_alloc,
sha384_ctx_free,
sha384_clone_wrap,
sha384_process_wrap,
};
......
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