#include "mbedtls/ecdsa.h"
#endif
+#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
+#include "mbedtls/platform_util.h"
+#endif
+
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#define mbedtls_free free
#endif
-#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
- volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
-#endif
+#include <limits.h>
+#include <stdint.h>
#if defined(MBEDTLS_RSA_C)
static int rsa_can_do( mbedtls_pk_type_t type )
static size_t rsa_get_bitlen( const void *ctx )
{
- return( 8 * ((const mbedtls_rsa_context *) ctx)->len );
+ const mbedtls_rsa_context * rsa = (const mbedtls_rsa_context *) ctx;
+ return( 8 * mbedtls_rsa_get_len( rsa ) );
}
static int rsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
const unsigned char *sig, size_t sig_len )
{
int ret;
+ mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
+ size_t rsa_len = mbedtls_rsa_get_len( rsa );
- if( sig_len < ((mbedtls_rsa_context *) ctx)->len )
+#if SIZE_MAX > UINT_MAX
+ if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* SIZE_MAX > UINT_MAX */
+
+ if( sig_len < rsa_len )
return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
- if( ( ret = mbedtls_rsa_pkcs1_verify( (mbedtls_rsa_context *) ctx, NULL, NULL,
+ if( ( ret = mbedtls_rsa_pkcs1_verify( rsa, NULL, NULL,
MBEDTLS_RSA_PUBLIC, md_alg,
(unsigned int) hash_len, hash, sig ) ) != 0 )
return( ret );
- if( sig_len > ((mbedtls_rsa_context *) ctx)->len )
+ /* The buffer contains a valid signature followed by extra data.
+ * We have a special error code for that so that so that callers can
+ * use mbedtls_pk_verify() to check "Does the buffer start with a
+ * valid signature?" and not just "Does the buffer contain a valid
+ * signature?". */
+ if( sig_len > rsa_len )
return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
return( 0 );
unsigned char *sig, size_t *sig_len,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
- *sig_len = ((mbedtls_rsa_context *) ctx)->len;
+ mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
+
+#if SIZE_MAX > UINT_MAX
+ if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* SIZE_MAX > UINT_MAX */
- return( mbedtls_rsa_pkcs1_sign( (mbedtls_rsa_context *) ctx, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
+ *sig_len = mbedtls_rsa_get_len( rsa );
+
+ return( mbedtls_rsa_pkcs1_sign( rsa, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
md_alg, (unsigned int) hash_len, hash, sig ) );
}
unsigned char *output, size_t *olen, size_t osize,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
- if( ilen != ((mbedtls_rsa_context *) ctx)->len )
+ mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
+
+ if( ilen != mbedtls_rsa_get_len( rsa ) )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
- return( mbedtls_rsa_pkcs1_decrypt( (mbedtls_rsa_context *) ctx, f_rng, p_rng,
+ return( mbedtls_rsa_pkcs1_decrypt( rsa, f_rng, p_rng,
MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) );
}
unsigned char *output, size_t *olen, size_t osize,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
- *olen = ((mbedtls_rsa_context *) ctx)->len;
+ mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
+ *olen = mbedtls_rsa_get_len( rsa );
if( *olen > osize )
return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
- return( mbedtls_rsa_pkcs1_encrypt( (mbedtls_rsa_context *) ctx,
- f_rng, p_rng, MBEDTLS_RSA_PUBLIC, ilen, input, output ) );
+ return( mbedtls_rsa_pkcs1_encrypt( rsa, f_rng, p_rng, MBEDTLS_RSA_PUBLIC,
+ ilen, input, output ) );
}
static int rsa_check_pair_wrap( const void *pub, const void *prv )
rsa_can_do,
rsa_verify_wrap,
rsa_sign_wrap,
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+ NULL,
+ NULL,
+#endif
rsa_decrypt_wrap,
rsa_encrypt_wrap,
rsa_check_pair_wrap,
rsa_alloc_wrap,
rsa_free_wrap,
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+ NULL,
+ NULL,
+#endif
rsa_debug,
};
#endif /* MBEDTLS_RSA_C */
return( ret );
}
+#if defined(MBEDTLS_ECP_RESTARTABLE)
+/* Forward declarations */
+static int ecdsa_verify_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len,
+ void *rs_ctx );
+
+static int ecdsa_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
+ void *rs_ctx );
+
+/*
+ * Restart context for ECDSA operations with ECKEY context
+ *
+ * We need to store an actual ECDSA context, as we need to pass the same to
+ * the underlying ecdsa function, so we can't create it on the fly every time.
+ */
+typedef struct
+{
+ mbedtls_ecdsa_restart_ctx ecdsa_rs;
+ mbedtls_ecdsa_context ecdsa_ctx;
+} eckey_restart_ctx;
+
+static void *eckey_rs_alloc( void )
+{
+ eckey_restart_ctx *rs_ctx;
+
+ void *ctx = mbedtls_calloc( 1, sizeof( eckey_restart_ctx ) );
+
+ if( ctx != NULL )
+ {
+ rs_ctx = ctx;
+ mbedtls_ecdsa_restart_init( &rs_ctx->ecdsa_rs );
+ mbedtls_ecdsa_init( &rs_ctx->ecdsa_ctx );
+ }
+
+ return( ctx );
+}
+
+static void eckey_rs_free( void *ctx )
+{
+ eckey_restart_ctx *rs_ctx;
+
+ if( ctx == NULL)
+ return;
+
+ rs_ctx = ctx;
+ mbedtls_ecdsa_restart_free( &rs_ctx->ecdsa_rs );
+ mbedtls_ecdsa_free( &rs_ctx->ecdsa_ctx );
+
+ mbedtls_free( ctx );
+}
+
+static int eckey_verify_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len,
+ void *rs_ctx )
+{
+ int ret;
+ eckey_restart_ctx *rs = rs_ctx;
+
+ /* Should never happen */
+ if( rs == NULL )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ /* set up our own sub-context if needed (that is, on first run) */
+ if( rs->ecdsa_ctx.grp.pbits == 0 )
+ MBEDTLS_MPI_CHK( mbedtls_ecdsa_from_keypair( &rs->ecdsa_ctx, ctx ) );
+
+ MBEDTLS_MPI_CHK( ecdsa_verify_rs_wrap( &rs->ecdsa_ctx,
+ md_alg, hash, hash_len,
+ sig, sig_len, &rs->ecdsa_rs ) );
+
+cleanup:
+ return( ret );
+}
+
+static int eckey_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
+ void *rs_ctx )
+{
+ int ret;
+ eckey_restart_ctx *rs = rs_ctx;
+
+ /* Should never happen */
+ if( rs == NULL )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ /* set up our own sub-context if needed (that is, on first run) */
+ if( rs->ecdsa_ctx.grp.pbits == 0 )
+ MBEDTLS_MPI_CHK( mbedtls_ecdsa_from_keypair( &rs->ecdsa_ctx, ctx ) );
+
+ MBEDTLS_MPI_CHK( ecdsa_sign_rs_wrap( &rs->ecdsa_ctx, md_alg,
+ hash, hash_len, sig, sig_len,
+ f_rng, p_rng, &rs->ecdsa_rs ) );
+
+cleanup:
+ return( ret );
+}
+#endif /* MBEDTLS_ECP_RESTARTABLE */
#endif /* MBEDTLS_ECDSA_C */
static int eckey_check_pair( const void *pub, const void *prv )
#if defined(MBEDTLS_ECDSA_C)
eckey_verify_wrap,
eckey_sign_wrap,
-#else
+#if defined(MBEDTLS_ECP_RESTARTABLE)
+ eckey_verify_rs_wrap,
+ eckey_sign_rs_wrap,
+#endif
+#else /* MBEDTLS_ECDSA_C */
NULL,
NULL,
-#endif
+#endif /* MBEDTLS_ECDSA_C */
NULL,
NULL,
eckey_check_pair,
eckey_alloc_wrap,
eckey_free_wrap,
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+ eckey_rs_alloc,
+ eckey_rs_free,
+#endif
eckey_debug,
};
eckeydh_can_do,
NULL,
NULL,
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+ NULL,
+ NULL,
+#endif
NULL,
NULL,
eckey_check_pair,
eckey_alloc_wrap, /* Same underlying key structure */
eckey_free_wrap, /* Same underlying key structure */
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+ NULL,
+ NULL,
+#endif
eckey_debug, /* Same underlying key structure */
};
#endif /* MBEDTLS_ECP_C */
md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng ) );
}
+#if defined(MBEDTLS_ECP_RESTARTABLE)
+static int ecdsa_verify_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len,
+ void *rs_ctx )
+{
+ int ret;
+ ((void) md_alg);
+
+ ret = mbedtls_ecdsa_read_signature_restartable(
+ (mbedtls_ecdsa_context *) ctx,
+ hash, hash_len, sig, sig_len,
+ (mbedtls_ecdsa_restart_ctx *) rs_ctx );
+
+ if( ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH )
+ return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
+
+ return( ret );
+}
+
+static int ecdsa_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
+ void *rs_ctx )
+{
+ return( mbedtls_ecdsa_write_signature_restartable(
+ (mbedtls_ecdsa_context *) ctx,
+ md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng,
+ (mbedtls_ecdsa_restart_ctx *) rs_ctx ) );
+
+}
+#endif /* MBEDTLS_ECP_RESTARTABLE */
+
static void *ecdsa_alloc_wrap( void )
{
void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecdsa_context ) );
mbedtls_free( ctx );
}
+#if defined(MBEDTLS_ECP_RESTARTABLE)
+static void *ecdsa_rs_alloc( void )
+{
+ void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecdsa_restart_ctx ) );
+
+ if( ctx != NULL )
+ mbedtls_ecdsa_restart_init( ctx );
+
+ return( ctx );
+}
+
+static void ecdsa_rs_free( void *ctx )
+{
+ mbedtls_ecdsa_restart_free( ctx );
+ mbedtls_free( ctx );
+}
+#endif /* MBEDTLS_ECP_RESTARTABLE */
+
const mbedtls_pk_info_t mbedtls_ecdsa_info = {
MBEDTLS_PK_ECDSA,
"ECDSA",
ecdsa_can_do,
ecdsa_verify_wrap,
ecdsa_sign_wrap,
+#if defined(MBEDTLS_ECP_RESTARTABLE)
+ ecdsa_verify_rs_wrap,
+ ecdsa_sign_rs_wrap,
+#endif
NULL,
NULL,
eckey_check_pair, /* Compatible key structures */
ecdsa_alloc_wrap,
ecdsa_free_wrap,
+#if defined(MBEDTLS_ECP_RESTARTABLE)
+ ecdsa_rs_alloc,
+ ecdsa_rs_free,
+#endif
eckey_debug, /* Compatible key structures */
};
#endif /* MBEDTLS_ECDSA_C */
{
mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx;
+#if SIZE_MAX > UINT_MAX
+ if( UINT_MAX < hash_len )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* SIZE_MAX > UINT_MAX */
+
*sig_len = rsa_alt->key_len_func( rsa_alt->key );
return( rsa_alt->sign_func( rsa_alt->key, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
static void rsa_alt_free_wrap( void *ctx )
{
- mbedtls_zeroize( ctx, sizeof( mbedtls_rsa_alt_context ) );
+ mbedtls_platform_zeroize( ctx, sizeof( mbedtls_rsa_alt_context ) );
mbedtls_free( ctx );
}
rsa_alt_can_do,
NULL,
rsa_alt_sign_wrap,
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+ NULL,
+ NULL,
+#endif
rsa_alt_decrypt_wrap,
NULL,
#if defined(MBEDTLS_RSA_C)
#endif
rsa_alt_alloc_wrap,
rsa_alt_free_wrap,
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+ NULL,
+ NULL,
+#endif
NULL,
};
projects / platform / upstream / iotivity.git / blobdiff