gcm128.c: minor optimization.
authorAndy Polyakov <appro@openssl.org>
Sun, 24 Apr 2011 11:10:54 +0000 (11:10 +0000)
committerAndy Polyakov <appro@openssl.org>
Sun, 24 Apr 2011 11:10:54 +0000 (11:10 +0000)
crypto/modes/gcm128.c

index 8a76e1a..8b9070a 100644 (file)
@@ -884,7 +884,9 @@ int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
        const union { long one; char little; } is_endian = {1};
        unsigned int n, ctr;
        size_t i;
-       u64 mlen = ctx->len.u[1];
+       u64        mlen  = ctx->len.u[1];
+       block128_f block = ctx->block;
+       void      *key   = ctx->key;
 #ifdef GCM_FUNCREF_4BIT
        void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])    = ctx->gmult;
 # ifdef GHASH
@@ -936,7 +938,7 @@ int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
                    size_t j=GHASH_CHUNK;
 
                    while (j) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -956,7 +958,7 @@ int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
                    size_t j=i;
 
                    while (len>=16) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -973,7 +975,7 @@ int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
                }
 #else
                while (len>=16) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -990,7 +992,7 @@ int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
                }
 #endif
                if (len) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -1008,7 +1010,7 @@ int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
 #endif
        for (i=0;i<len;++i) {
                if (n==0) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -1032,7 +1034,9 @@ int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
        const union { long one; char little; } is_endian = {1};
        unsigned int n, ctr;
        size_t i;
-       u64 mlen = ctx->len.u[1];
+       u64        mlen  = ctx->len.u[1];
+       block128_f block = ctx->block;
+       void      *key   = ctx->key;
 #ifdef GCM_FUNCREF_4BIT
        void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])    = ctx->gmult;
 # ifdef GHASH
@@ -1084,7 +1088,7 @@ int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
 
                    GHASH(ctx,in,GHASH_CHUNK);
                    while (j) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -1102,7 +1106,7 @@ int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
                if ((i = (len&(size_t)-16))) {
                    GHASH(ctx,in,i);
                    while (len>=16) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -1118,7 +1122,7 @@ int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
                }
 #else
                while (len>=16) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -1136,7 +1140,7 @@ int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
                }
 #endif
                if (len) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -1157,7 +1161,7 @@ int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
        for (i=0;i<len;++i) {
                u8 c;
                if (n==0) {
-                       (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+                       (*block)(ctx->Yi.c,ctx->EKi.c,key);
                        ++ctr;
                        if (is_endian.little)
                                PUTU32(ctx->Yi.c+12,ctr);
@@ -1183,7 +1187,8 @@ int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx,
        const union { long one; char little; } is_endian = {1};
        unsigned int n, ctr;
        size_t i;
-       u64 mlen = ctx->len.u[1];
+       u64   mlen = ctx->len.u[1];
+       void *key  = ctx->key;
 #ifdef GCM_FUNCREF_4BIT
        void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])    = ctx->gmult;
 # ifdef GHASH
@@ -1223,7 +1228,7 @@ int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx,
        }
 #if defined(GHASH) && !defined(OPENSSL_SMALL_FOOTPRINT)
        while (len>=GHASH_CHUNK) {
-               (*stream)(in,out,GHASH_CHUNK/16,ctx->key,ctx->Yi.c);
+               (*stream)(in,out,GHASH_CHUNK/16,key,ctx->Yi.c);
                ctr += GHASH_CHUNK/16;
                if (is_endian.little)
                        PUTU32(ctx->Yi.c+12,ctr);
@@ -1238,7 +1243,7 @@ int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx,
        if ((i = (len&(size_t)-16))) {
                size_t j=i/16;
 
-               (*stream)(in,out,j,ctx->key,ctx->Yi.c);
+               (*stream)(in,out,j,key,ctx->Yi.c);
                ctr += (unsigned int)j;
                if (is_endian.little)
                        PUTU32(ctx->Yi.c+12,ctr);
@@ -1258,7 +1263,7 @@ int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx,
 #endif
        }
        if (len) {
-               (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+               (*ctx->block)(ctx->Yi.c,ctx->EKi.c,key);
                ++ctr;
                if (is_endian.little)
                        PUTU32(ctx->Yi.c+12,ctr);
@@ -1281,7 +1286,8 @@ int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx,
        const union { long one; char little; } is_endian = {1};
        unsigned int n, ctr;
        size_t i;
-       u64 mlen = ctx->len.u[1];
+       u64   mlen = ctx->len.u[1];
+       void *key  = ctx->key;
 #ifdef GCM_FUNCREF_4BIT
        void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])    = ctx->gmult;
 # ifdef GHASH
@@ -1324,7 +1330,7 @@ int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx,
 #if defined(GHASH) && !defined(OPENSSL_SMALL_FOOTPRINT)
        while (len>=GHASH_CHUNK) {
                GHASH(ctx,in,GHASH_CHUNK);
-               (*stream)(in,out,GHASH_CHUNK/16,ctx->key,ctx->Yi.c);
+               (*stream)(in,out,GHASH_CHUNK/16,key,ctx->Yi.c);
                ctr += GHASH_CHUNK/16;
                if (is_endian.little)
                        PUTU32(ctx->Yi.c+12,ctr);
@@ -1350,7 +1356,7 @@ int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx,
                j   = i/16;
                in -= i;
 #endif
-               (*stream)(in,out,j,ctx->key,ctx->Yi.c);
+               (*stream)(in,out,j,key,ctx->Yi.c);
                ctr += (unsigned int)j;
                if (is_endian.little)
                        PUTU32(ctx->Yi.c+12,ctr);
@@ -1361,7 +1367,7 @@ int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx,
                len -= i;
        }
        if (len) {
-               (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+               (*ctx->block)(ctx->Yi.c,ctx->EKi.c,key);
                ++ctr;
                if (is_endian.little)
                        PUTU32(ctx->Yi.c+12,ctr);