X-Git-Url: http://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=gost_grasshopper_cipher.c;h=20c04b0d7f5e12de1925ac6cc219851ed5e23a0f;hb=25729ddc501fecd873943450dec45e15d885c20f;hp=b3aa4b9aa9009184dae6b9cc20b30f9ba9b4deba;hpb=e2d3705da37abfa9edf270b52178c8c66abc51e7;p=openssl-gost%2Fengine.git

diff --git a/gost_grasshopper_cipher.c b/gost_grasshopper_cipher.c
index b3aa4b9..20c04b0 100644
--- a/gost_grasshopper_cipher.c
+++ b/gost_grasshopper_cipher.c
@@ -103,7 +103,7 @@ static struct GRASSHOPPER_CIPHER_PARAMS gost_cipher_params[5] = {
 };
 
 /* Set 256 bit  key into context */
-static GRASSHOPPER_INLINE void gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx* c, const uint8_t* k) {
+GRASSHOPPER_INLINE void gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx* c, const uint8_t* k) {
 		int i;
     for (i = 0; i < 2; i++) {
         grasshopper_copy128(&c->key.k.k[i], (const grasshopper_w128_t*) (k + i * 16));
@@ -113,7 +113,7 @@ static GRASSHOPPER_INLINE void gost_grasshopper_cipher_key(gost_grasshopper_ciph
 }
 
 /* Cleans up key from context */
-static GRASSHOPPER_INLINE void gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx* c) {
+GRASSHOPPER_INLINE void gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx* c) {
 		int i;
     for (i = 0; i < 2; i++) {
         grasshopper_zero128(&c->key.k.k[i]);
@@ -138,11 +138,9 @@ static GRASSHOPPER_INLINE void gost_grasshopper_cipher_destroy_ctr(gost_grasshop
 
     grasshopper_zero128(&ctx->iv_buffer);
     grasshopper_zero128(&ctx->partial_buffer);
-
-    ctx->counter = 0;
 }
 
-static int gost_grasshopper_cipher_init(EVP_CIPHER_CTX* ctx, const unsigned char* key,
+int gost_grasshopper_cipher_init(EVP_CIPHER_CTX* ctx, const unsigned char* key,
                                         const unsigned char* iv, int enc) {
     gost_grasshopper_cipher_ctx* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
 
@@ -168,7 +166,7 @@ static int gost_grasshopper_cipher_init(EVP_CIPHER_CTX* ctx, const unsigned char
     return 1;
 }
 
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
+GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
                                                                const unsigned char* iv,
                                                                int enc) {
     gost_grasshopper_cipher_ctx* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
@@ -176,7 +174,7 @@ static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX* c
     return gost_grasshopper_cipher_init(ctx, key, iv, enc);
 }
 
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX* ctx, const unsigned char* key,
+GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX* ctx, const unsigned char* key,
                                                                const unsigned char* iv,
                                                                int enc) {
     gost_grasshopper_cipher_ctx* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
@@ -184,7 +182,7 @@ static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX* c
     return gost_grasshopper_cipher_init(ctx, key, iv, enc);
 }
 
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
+GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
                                                                const unsigned char* iv,
                                                                int enc) {
     gost_grasshopper_cipher_ctx_ofb* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
@@ -196,7 +194,7 @@ static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX* c
     return gost_grasshopper_cipher_init(ctx, key, iv, enc);
 }
 
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
+GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
                                                                const unsigned char* iv,
                                                                int enc) {
     gost_grasshopper_cipher_ctx* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
@@ -204,7 +202,7 @@ static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX* c
     return gost_grasshopper_cipher_init(ctx, key, iv, enc);
 }
 
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX* ctx, const unsigned char* key,
+GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX* ctx, const unsigned char* key,
                                                                const unsigned char* iv,
                                                                int enc) {
     gost_grasshopper_cipher_ctx_ctr* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
@@ -214,12 +212,10 @@ static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX* c
     grasshopper_zero128(&c->iv_buffer);
     grasshopper_zero128(&c->partial_buffer);
 
-    c->counter = 0;
-
     return gost_grasshopper_cipher_init(ctx, key, iv, enc);
 }
 
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_do(EVP_CIPHER_CTX* ctx, unsigned char* out,
+GRASSHOPPER_INLINE int gost_grasshopper_cipher_do(EVP_CIPHER_CTX* ctx, unsigned char* out,
                                                          const unsigned char* in, size_t inl) {
     gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
     struct GRASSHOPPER_CIPHER_PARAMS* params = &gost_cipher_params[c->type];
@@ -227,7 +223,7 @@ static GRASSHOPPER_INLINE int gost_grasshopper_cipher_do(EVP_CIPHER_CTX* ctx, un
     return params->do_cipher(ctx, out, in, inl);
 }
 
-static int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX* ctx, unsigned char* out,
+int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX* ctx, unsigned char* out,
                                           const unsigned char* in, size_t inl) {
     gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
     bool encrypting = (bool) EVP_CIPHER_CTX_encrypting(ctx);
@@ -251,7 +247,7 @@ static int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX* ctx, unsigned char* ou
     return 1;
 }
 
-static int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX* ctx, unsigned char* out,
+int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX* ctx, unsigned char* out,
                                           const unsigned char* in, size_t inl) {
     gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
     unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
@@ -283,7 +279,22 @@ static int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX* ctx, unsigned char* ou
     return 1;
 }
 
-static int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX* ctx, unsigned char* out,
+/* increment counter (128-bit int) by 1 */
+static void ctr128_inc(unsigned char *counter)
+{
+    unsigned int n = 16;
+    unsigned char c;
+
+    do {
+        --n;
+        c = counter[n];
+        ++c;
+        counter[n] = c;
+        if (c) return;
+    } while (n);
+}
+
+int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX* ctx, unsigned char* out,
                                           const unsigned char* in, size_t inl) {
     gost_grasshopper_cipher_ctx_ctr* c = (gost_grasshopper_cipher_ctx_ctr*) EVP_CIPHER_CTX_get_cipher_data(ctx);
     unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
@@ -301,10 +312,9 @@ static int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX* ctx, unsigned char* ou
     for (i = 0; i < blocks; i++) {
         currentInputBlock = (grasshopper_w128_t*) current_in;
         currentOutputBlock = (grasshopper_w128_t*) current_out;
-        memcpy(c->iv_buffer.b + 8, &c->counter, 8);
         grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, currentOutputBlock, &c->c.buffer);
         grasshopper_append128(currentOutputBlock, currentInputBlock);
-        c->counter += 1;
+        ctr128_inc(c->iv_buffer.b);
         current_in += GRASSHOPPER_BLOCK_SIZE;
         current_out += GRASSHOPPER_BLOCK_SIZE;
     }
@@ -314,12 +324,11 @@ static int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX* ctx, unsigned char* ou
     if (lasted > 0) {
         currentInputBlock = (grasshopper_w128_t*) current_in;
         currentOutputBlock = (grasshopper_w128_t*) current_out;
-        memcpy(c->iv_buffer.b + 8, &c->counter, 8);
         grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, &c->partial_buffer, &c->c.buffer);
         for (i = 0; i < lasted; i++) {
             currentOutputBlock->b[i] = c->partial_buffer.b[i] ^ currentInputBlock->b[i];
         }
-        c->counter += 1;
+        ctr128_inc(c->iv_buffer.b);
     }
 
     return 1;
@@ -372,7 +381,7 @@ static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx_ofb* ctx, gras
     grasshopper_encrypt_block(&ctx->c.encrypt_round_keys, &ctx->buffer1, buf, &ctx->c.buffer);
 }
 
-static int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX* ctx, unsigned char* out,
+int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX* ctx, unsigned char* out,
                                           const unsigned char* in, size_t inl) {
     gost_grasshopper_cipher_ctx_ofb* c = (gost_grasshopper_cipher_ctx_ofb*) EVP_CIPHER_CTX_get_cipher_data(ctx);
     const unsigned char* in_ptr = in;
@@ -430,7 +439,7 @@ static int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX* ctx, unsigned char* ou
     return 1;
 }
 
-static int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX* ctx, unsigned char* out,
+int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX* ctx, unsigned char* out,
                                           const unsigned char* in, size_t inl) {
     gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
     const unsigned char* in_ptr = in;
@@ -509,7 +518,7 @@ static int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX* ctx, unsigned char* ou
     return 1;
 }
 
-static int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX* ctx) {
+int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX* ctx) {
     gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
     struct GRASSHOPPER_CIPHER_PARAMS* params = &gost_cipher_params[c->type];
 
@@ -523,17 +532,16 @@ static int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX* ctx) {
     return 1;
 }
 
-static int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) {
+int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) {
     int len = 0;
     unsigned char* buf = NULL;
-    unsigned char* p = NULL;
     ASN1_OCTET_STRING* os = NULL;
 
     os = ASN1_OCTET_STRING_new();
 
     if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
         OPENSSL_free(buf);
-        GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
+        GOSTerr(GOST_F_GOST_GRASSHOPPER_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
         return 0;
     }
     OPENSSL_free(buf);
@@ -542,7 +550,7 @@ static int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE*
     return 1;
 }
 
-static GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) {
+GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) {
     int ret = -1;
 
     if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
@@ -552,23 +560,23 @@ static GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CT
     return 1;
 }
 
-static int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX* ctx, int type, int arg, void* ptr) {
+int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX* ctx, int type, int arg, void* ptr) {
     switch (type) {
         case EVP_CTRL_RAND_KEY: {
             if (RAND_bytes((unsigned char*) ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
-                GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
+                GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, GOST_R_RNG_ERROR);
                 return -1;
             }
             break;
         }
         default:
-            GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
+            GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
             return -1;
     }
     return 1;
 }
 
-static GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_create(int cipher_type, int block_size) {
+GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_create(int cipher_type, int block_size) {
     return EVP_CIPHER_meth_new(cipher_type,
                                block_size  /* block_size */,
                                GRASSHOPPER_KEY_SIZE /* key_size */);
@@ -590,7 +598,7 @@ const int cipher_gost_grasshopper_setup(EVP_CIPHER* cipher, uint8_t mode, int iv
            EVP_CIPHER_meth_set_do_cipher(cipher, gost_grasshopper_cipher_do);
 }
 
-static const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper(uint8_t mode, uint8_t num) {
+const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper(uint8_t mode, uint8_t num) {
     EVP_CIPHER** cipher;
     struct GRASSHOPPER_CIPHER_PARAMS* params;