X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/316670eb35587141e969394ae8537d66b9211e80..2a1bd2d3eef5c7a7bb14f4bb9fdbca9a96ee4752:/EXTERNAL_HEADERS/corecrypto/ccmode_impl.h

diff --git a/EXTERNAL_HEADERS/corecrypto/ccmode_impl.h b/EXTERNAL_HEADERS/corecrypto/ccmode_impl.h
index 3e35f548e..ff8486b24 100644
--- a/EXTERNAL_HEADERS/corecrypto/ccmode_impl.h
+++ b/EXTERNAL_HEADERS/corecrypto/ccmode_impl.h
@@ -1,10 +1,12 @@
-/*
- *  ccmode_impl.h
- *  corecrypto
- *
- *  Created by James Murphy on 12/9/11.
- *  Copyright (c) 2011 Apple Inc. All rights reserved.
+/* Copyright (c) (2010,2011,2012,2015,2016,2017,2018,2019) Apple Inc. All rights reserved.
  *
+ * corecrypto is licensed under Apple Inc.’s Internal Use License Agreement (which
+ * is contained in the License.txt file distributed with corecrypto) and only to 
+ * people who accept that license. IMPORTANT:  Any license rights granted to you by 
+ * Apple Inc. (if any) are limited to internal use within your organization only on 
+ * devices and computers you own or control, for the sole purpose of verifying the 
+ * security characteristics and correct functioning of the Apple Software.  You may 
+ * not, directly or indirectly, redistribute the Apple Software or any portions thereof.
  */
 
 #ifndef _CORECRYPTO_CCMODE_IMPL_H_
@@ -15,151 +17,214 @@
 /* ECB mode. */
 cc_aligned_struct(16) ccecb_ctx;
 
-
 /* Actual symmetric algorithm implementation should provide you one of these. */
 struct ccmode_ecb {
-    size_t size;        /* first argument to ccecb_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_ecb *ecb, ccecb_ctx *ctx,
-                 unsigned long key_len, const void *key);
-    void (*ecb)(const ccecb_ctx *ctx, unsigned long nblocks, const void *in,
-                void *out);
+    size_t size; /* first argument to ccecb_ctx_decl(). */
+    size_t block_size;
+    int (*CC_SPTR(ccmode_ecb, init))(const struct ccmode_ecb *ecb, ccecb_ctx *ctx, size_t key_nbytes, const void *key);
+    int (*CC_SPTR(ccmode_ecb, ecb))(const ccecb_ctx *ctx, size_t nblocks, const void *in, void *out);
+    void (*CC_SPTR(ccmode_ecb, roundkey))(const ccecb_ctx *ctx, unsigned r, void *key);
 };
 
-/* CBC mode. */
+/*!
+ * @brief corecrypto symmetrical encryption and decryption modes
+ *
+ * corecrypto supports 6 stateless en(de)cryption modes and 2 stateful authenticated en(de)cryption modes
+ * stateless modes CBC, CFB, CFB8, CTR, OFB, XTS: They provide 3 interface functions that do not return errors codes
+ *   1- ccmod_xxx_init()
+ *   2- ccmod_xxx_decrypt()
+ *   3- ccmod_xxx_encrypt()
+ *
+ * stateful modes CCM and GCM: They provide 7 interface functions that return error codes if a function is called out of state
+ *   1- ccmod_xxx_init()
+ *   2- ccmod_xxx_setiv()
+ *   3- ccmod_xxx_aad()
+ *   4- ccmod_xxx_decrypt()
+ *   5- ccmod_xxx_encrypt()
+ *   6- ccmod_xxx_finalize()
+ *   7- ccmod_xxx_reset()
+ *
+ *  the correct call sequences are:
+ *
+ *  calls to 1, 2 and 6 arerequired
+ *  2 and 3 can be called as mant times as needed
+ *  calls to 3, 4, 5 can be skipped
+ *
+ *  1, 2*n, 3*n, 4|5, 6
+ *  1, 2*n,    , 4|5, 6
+ *  1, 2*n,    ,    , 6
+ *  1, 2*n, 3*n,    , 6
+ */
+
+// 1- CBC mode, stateless
 cc_aligned_struct(16) cccbc_ctx;
 cc_aligned_struct(16) cccbc_iv;
 
 struct ccmode_cbc {
-    size_t size;        /* first argument to cccbc_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_cbc *cbc, cccbc_ctx *ctx,
-                     unsigned long key_len, const void *key);
+    size_t size; /* first argument to cccbc_ctx_decl(). */
+    size_t block_size;
+    int (*CC_SPTR(ccmode_cbc, init))(const struct ccmode_cbc *cbc, cccbc_ctx *ctx, size_t key_len, const void *key);
     /* cbc encrypt or decrypt nblocks from in to out, iv will be used and updated. */
-    void (*cbc)(const cccbc_ctx *ctx, cccbc_iv *iv, unsigned long nblocks,
-                const void *in, void *out);
+    int (*CC_SPTR(ccmode_cbc, cbc))(const cccbc_ctx *ctx, cccbc_iv *iv, size_t nblocks, const void *in, void *out);
     const void *custom;
 };
 
-/* CFB mode. */
+// 2- CFB mode, stateless
 cc_aligned_struct(16) cccfb_ctx;
 
 struct ccmode_cfb {
-    size_t size;        /* first argument to cccfb_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_cfb *cfb, cccfb_ctx *ctx,
-                 unsigned long key_len, const void *key,
-                 const void *iv);
-    void (*cfb)(cccfb_ctx *ctx, unsigned long nblocks,
-                const void *in, void *out);
+    size_t size; /* first argument to cccfb_ctx_decl(). */
+    size_t block_size;
+    int (*CC_SPTR(ccmode_cfb,
+                  init))(const struct ccmode_cfb *cfb, cccfb_ctx *ctx, size_t key_len, const void *key, const void *iv);
+    int (*CC_SPTR(ccmode_cfb, cfb))(cccfb_ctx *ctx, size_t nbytes, const void *in, void *out);
     const void *custom;
 };
 
-/* CFB8 mode. */
-
+// 3- CFB8 mode, stateless
 cc_aligned_struct(16) cccfb8_ctx;
 
 struct ccmode_cfb8 {
-    size_t size;        /* first argument to cccfb8_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_cfb8 *cfb8, cccfb8_ctx *ctx,
-                 unsigned long key_len, const void *key,
-                 const void *iv);
-    void (*cfb8)(cccfb8_ctx *ctx, unsigned long nbytes,
-                 const void *in, void *out);
+    size_t size; /* first argument to cccfb8_ctx_decl(). */
+    size_t block_size;
+    int (*CC_SPTR(ccmode_cfb8,
+                  init))(const struct ccmode_cfb8 *cfb8, cccfb8_ctx *ctx, size_t key_len, const void *key, const void *iv);
+    int (*CC_SPTR(ccmode_cfb8, cfb8))(cccfb8_ctx *ctx, size_t nbytes, const void *in, void *out);
     const void *custom;
 };
 
-/* CTR mode. */
-
+// 4- CTR mode, stateless
 cc_aligned_struct(16) ccctr_ctx;
 
 struct ccmode_ctr {
-    size_t size;        /* first argument to ccctr_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_ctr *ctr, ccctr_ctx *ctx,
-                 unsigned long key_len, const void *key,
-                 const void *iv);
-    void (*ctr)(ccctr_ctx *ctx, unsigned long nblocks,
-                const void *in, void *out);
+    size_t size;           /* first argument to ccctr_ctx_decl(). */
+    size_t block_size;     /* for historical reasons, this is set to 1 */
+    size_t ecb_block_size; /* the actual block size of the underlying cipher */
+    int (*CC_SPTR(ccmode_ctr,
+                  init))(const struct ccmode_ctr *mode, ccctr_ctx *ctx, size_t key_len, const void *key, const void *iv);
+    int (*CC_SPTR(ccmode_ctr, setctr))(const struct ccmode_ctr *mode, ccctr_ctx *ctx, const void *ctr);
+    int (*CC_SPTR(ccmode_ctr, ctr))(ccctr_ctx *ctx, size_t nbytes, const void *in, void *out);
     const void *custom;
 };
 
-/* OFB mode. */
-
+// 5- OFB mode, stateless
 cc_aligned_struct(16) ccofb_ctx;
 
 struct ccmode_ofb {
-    size_t size;        /* first argument to ccofb_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_ofb *ofb, ccofb_ctx *ctx,
-                 unsigned long key_len, const void *key,
-                 const void *iv);
-    void (*ofb)(ccofb_ctx *ctx, unsigned long nblocks,
-                const void *in, void *out);
+    size_t size; /* first argument to ccofb_ctx_decl(). */
+    size_t block_size;
+    int (*CC_SPTR(ccmode_ofb,
+                  init))(const struct ccmode_ofb *ofb, ccofb_ctx *ctx, size_t key_len, const void *key, const void *iv);
+    int (*CC_SPTR(ccmode_ofb, ofb))(ccofb_ctx *ctx, size_t nbytes, const void *in, void *out);
     const void *custom;
 };
 
-/* XTS mode. */
-
+// 6- XTS mode, stateless
 cc_aligned_struct(16) ccxts_ctx;
 cc_aligned_struct(16) ccxts_tweak;
 
 struct ccmode_xts {
-    size_t size;        /* first argument to ccxts_ctx_decl(). */
-    size_t tweak_size;  /* first argument to ccxts_tweak_decl(). */
-    unsigned long block_size;
-
-    /* Create a xts key from a xts mode object.  The tweak_len here
-     determines how long the tweak is in bytes, for each subsequent call to
-     ccmode_xts->xts().
-     key must point to at least 'size' cc_units of free storage.
-     tweak_key must point to at least 'tweak_size' cc_units of free storage. */
-    void (*init)(const struct ccmode_xts *xts, ccxts_ctx *ctx,
-                 unsigned long key_len, const void *key,
-                 const void *tweak_key);
+    size_t size;       /* first argument to ccxts_ctx_decl(). Size of the ctx data structure */
+    size_t tweak_size; /* first argument to ccxts_tweak_decl(). Size of the tweak structure, not the expected tweak size */
+    size_t block_size;
+
+    /* Create a xts key from a xts mode object.
+     key must point to at least 'size' bytes of free storage.
+     tweak_key must point to at least 'tweak_size' bytes of free storage.
+     key and tweak_key must differ.
+     Returns nonzero on failure.
+     */
+    int (*CC_SPTR(ccmode_xts, init))(const struct ccmode_xts *xts,
+                                     ccxts_ctx *ctx,
+                                     size_t key_nbytes,
+                                     const void *data_key,
+                                     const void *tweak_key);
+
+    void (*CC_SPTR(ccmode_xts, key_sched))(const struct ccmode_xts *xts,
+                                           ccxts_ctx *ctx,
+                                           size_t key_nbytes,
+                                           const void *data_key,
+                                           const void *tweak_key);
 
     /* Set the tweak (sector number), the block within the sector zero. */
-    void (*set_tweak)(const ccxts_ctx *ctx, ccxts_tweak *tweak, const void *iv);
+    int (*CC_SPTR(ccmode_xts, set_tweak))(const ccxts_ctx *ctx, ccxts_tweak *tweak, const void *iv);
 
     /* Encrypt blocks for a sector, clients must call set_tweak before calling
        this function. Return a pointer to the tweak buffer */
-    void *(*xts)(const ccxts_ctx *ctx, ccxts_tweak *tweak, unsigned long nblocks,
-                    const void *in, void *out);
+    void *(*CC_SPTR(ccmode_xts, xts))(const ccxts_ctx *ctx, ccxts_tweak *tweak, size_t nblocks, const void *in, void *out);
 
     const void *custom;
     const void *custom1;
 };
 
-/* GCM mode. */
-
+// 7- GCM mode, statful
 cc_aligned_struct(16) ccgcm_ctx;
+#define CCMODE_GCM_DECRYPTOR 78647
+#define CCMODE_GCM_ENCRYPTOR 4073947
 
 struct ccmode_gcm {
-    size_t size;        /* first argument to ccgcm_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_gcm *gcm, ccgcm_ctx *ctx,
-                 unsigned long key_len, const void *key);
-    void (*set_iv)(ccgcm_ctx *ctx, size_t iv_size, const void *iv);
-    void (*gmac)(ccgcm_ctx *ctx, unsigned long nbytes, const void *in);  // could just be gcm with NULL out
-    void (*gcm)(ccgcm_ctx *ctx, unsigned long nbytes, const void *in, void *out);
-    void (*finalize)(ccgcm_ctx *key, size_t tag_size, void *tag);
-    void (*reset)(ccgcm_ctx *ctx);
+    size_t size; /* first argument to ccgcm_ctx_decl(). */
+    int encdec;  // is it encrypt or decrypt object
+    size_t block_size;
+    int (*CC_SPTR(ccmode_gcm, init))(const struct ccmode_gcm *gcm, ccgcm_ctx *ctx, size_t key_nbytes, const void *key);
+    int (*CC_SPTR(ccmode_gcm, set_iv))(ccgcm_ctx *ctx, size_t iv_nbytes, const void *iv);
+    int (*CC_SPTR(ccmode_gcm, gmac))(ccgcm_ctx *ctx, size_t nbytes, const void *in); // could just be gcm with NULL out
+    int (*CC_SPTR(ccmode_gcm, gcm))(ccgcm_ctx *ctx, size_t nbytes, const void *in, void *out);
+    int (*CC_SPTR(ccmode_gcm, finalize))(ccgcm_ctx *key, size_t tag_nbytes, void *tag);
+    int (*CC_SPTR(ccmode_gcm, reset))(ccgcm_ctx *ctx);
     const void *custom;
 };
 
-/* OMAC mode. */
+// 8- CCM mode, stateful
+cc_aligned_struct(16) ccccm_ctx;
+cc_aligned_struct(16) ccccm_nonce;
+
+struct ccmode_ccm {
+    size_t size;       /* first argument to ccccm_ctx_decl(). */
+    size_t nonce_size; /* first argument to ccccm_nonce_decl(). */
+    size_t block_size;
+    int (*CC_SPTR(ccmode_ccm, init))(const struct ccmode_ccm *ccm, ccccm_ctx *ctx, size_t key_len, const void *key);
+    int (*CC_SPTR(ccmode_ccm, set_iv))(ccccm_ctx *ctx,
+                                       ccccm_nonce *nonce_ctx,
+                                       size_t nonce_len,
+                                       const void *nonce,
+                                       size_t mac_size,
+                                       size_t auth_len,
+                                       size_t data_len);
+    int (*CC_SPTR(ccmode_ccm, cbcmac))(ccccm_ctx *ctx,
+                                       ccccm_nonce *nonce_ctx,
+                                       size_t nbytes,
+                                       const void *in); // could just be ccm with NULL out
+    int (*CC_SPTR(ccmode_ccm, ccm))(ccccm_ctx *ctx, ccccm_nonce *nonce_ctx, size_t nbytes, const void *in, void *out);
+    int (*CC_SPTR(ccmode_ccm, finalize))(ccccm_ctx *key, ccccm_nonce *nonce_ctx, void *mac);
+    int (*CC_SPTR(ccmode_ccm, reset))(ccccm_ctx *key, ccccm_nonce *nonce_ctx);
+    const void *custom;
+};
 
+/* We need to expose this (currently)to keep CommonCrypto happy. */
+struct _ccmode_ccm_nonce {
+    unsigned char A_i[16]; /* crypto block iv */
+    unsigned char B_i[16]; /* mac block iv */
+    unsigned char MAC[16]; /* crypted mac */
+    unsigned char buf[16]; /* crypt buffer */
+
+    uint32_t mode;    /* mode: IV -> AD -> DATA */
+    uint32_t buflen;  /* length of data in buf */
+    uint32_t b_i_len; /* length of cbcmac data in B_i */
+
+    size_t nonce_size;
+    size_t mac_size;
+};
+
+/* OMAC mode. */
 cc_aligned_struct(16) ccomac_ctx;
 
 struct ccmode_omac {
-    size_t size;        /* first argument to ccomac_ctx_decl(). */
-    unsigned long block_size;
-    void (*init)(const struct ccmode_omac *omac, ccomac_ctx *ctx,
-                 unsigned long tweak_len, unsigned long key_len,
-                 const void *key);
-    int (*omac)(ccomac_ctx *ctx, unsigned long nblocks,
-                const void *tweak, const void *in, void *out);
+    size_t size; /* first argument to ccomac_ctx_decl(). */
+    size_t block_size;
+    int (*CC_SPTR(ccmode_omac,
+                  init))(const struct ccmode_omac *omac, ccomac_ctx *ctx, size_t tweak_len, size_t key_len, const void *key);
+    int (*CC_SPTR(ccmode_omac, omac))(ccomac_ctx *ctx, size_t nblocks, const void *tweak, const void *in, void *out);
     const void *custom;
 };