X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Faes%2Faes_ige.c;h=0fa28c383f217df473deb366409a169037817c15;hp=45d7096181877197c506ce3469ad385cc89e3054;hb=40720ce;hpb=9d03aabea3ead1fe6a194297ddffd4a87f89b93c

diff --git a/crypto/aes/aes_ige.c b/crypto/aes/aes_ige.c
index 45d7096181..0fa28c383f 100644
--- a/crypto/aes/aes_ige.c
+++ b/crypto/aes/aes_ige.c
@@ -7,7 +7,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
@@ -56,152 +56,147 @@
 
 #define N_WORDS (AES_BLOCK_SIZE / sizeof(unsigned long))
 typedef struct {
-        unsigned long data[N_WORDS];
+    unsigned long data[N_WORDS];
 } aes_block_t;
 
 /* XXX: probably some better way to do this */
 #if defined(__i386__) || defined(__x86_64__)
-#define UNALIGNED_MEMOPS_ARE_FAST 1
+# define UNALIGNED_MEMOPS_ARE_FAST 1
 #else
-#define UNALIGNED_MEMOPS_ARE_FAST 0
+# define UNALIGNED_MEMOPS_ARE_FAST 0
 #endif
 
 #if UNALIGNED_MEMOPS_ARE_FAST
-#define load_block(d, s)        (d) = *(const aes_block_t *)(s)
-#define store_block(d, s)       *(aes_block_t *)(d) = (s)
+# define load_block(d, s)        (d) = *(const aes_block_t *)(s)
+# define store_block(d, s)       *(aes_block_t *)(d) = (s)
 #else
-#define load_block(d, s)        memcpy((d).data, (s), AES_BLOCK_SIZE)
-#define store_block(d, s)       memcpy((d), (s).data, AES_BLOCK_SIZE)
+# define load_block(d, s)        memcpy((d).data, (s), AES_BLOCK_SIZE)
+# define store_block(d, s)       memcpy((d), (s).data, AES_BLOCK_SIZE)
 #endif
 
 /* N.B. The IV for this mode is _twice_ the block size */
 
 void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
-					 const unsigned long length, const AES_KEY *key,
-					 unsigned char *ivec, const int enc)
-	{
-	unsigned long n;
-	unsigned long len;
+                     const unsigned long length, const AES_KEY *key,
+                     unsigned char *ivec, const int enc)
+{
+    unsigned long n;
+    unsigned long len;
 
-	OPENSSL_assert(in && out && key && ivec);
-	OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
-	OPENSSL_assert((length%AES_BLOCK_SIZE) == 0);
+    OPENSSL_assert(in && out && key && ivec);
+    OPENSSL_assert((AES_ENCRYPT == enc) || (AES_DECRYPT == enc));
+    OPENSSL_assert((length % AES_BLOCK_SIZE) == 0);
 
-	len = length / AES_BLOCK_SIZE;
+    len = length / AES_BLOCK_SIZE;
 
-	if (AES_ENCRYPT == enc)
-		{
-		if (in != out &&
-		    (UNALIGNED_MEMOPS_ARE_FAST || ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(long)==0))
-			{
-			aes_block_t *ivp = (aes_block_t *)ivec;
-			aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
+    if (AES_ENCRYPT == enc) {
+        if (in != out &&
+            (UNALIGNED_MEMOPS_ARE_FAST
+             || ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(long) ==
+             0)) {
+            aes_block_t *ivp = (aes_block_t *) ivec;
+            aes_block_t *iv2p = (aes_block_t *) (ivec + AES_BLOCK_SIZE);
 
-			while (len)
-				{
-				aes_block_t *inp = (aes_block_t *)in;
-				aes_block_t *outp = (aes_block_t *)out;
+            while (len) {
+                aes_block_t *inp = (aes_block_t *) in;
+                aes_block_t *outp = (aes_block_t *) out;
 
-				for(n=0 ; n < N_WORDS; ++n)
-					outp->data[n] = inp->data[n] ^ ivp->data[n];
-				AES_encrypt((unsigned char *)outp->data, (unsigned char *)outp->data, key);
-				for(n=0 ; n < N_WORDS; ++n)
-					outp->data[n] ^= iv2p->data[n];
-				ivp = outp;
-				iv2p = inp;
-				--len;
-				in += AES_BLOCK_SIZE;
-				out += AES_BLOCK_SIZE;
-				}
-			memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
-			memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
-			}
-		else
-			{
-			aes_block_t tmp, tmp2;
-			aes_block_t iv;
-			aes_block_t iv2;
+                for (n = 0; n < N_WORDS; ++n)
+                    outp->data[n] = inp->data[n] ^ ivp->data[n];
+                AES_encrypt((unsigned char *)outp->data,
+                            (unsigned char *)outp->data, key);
+                for (n = 0; n < N_WORDS; ++n)
+                    outp->data[n] ^= iv2p->data[n];
+                ivp = outp;
+                iv2p = inp;
+                --len;
+                in += AES_BLOCK_SIZE;
+                out += AES_BLOCK_SIZE;
+            }
+            memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
+            memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
+        } else {
+            aes_block_t tmp, tmp2;
+            aes_block_t iv;
+            aes_block_t iv2;
 
-			load_block(iv, ivec);
-			load_block(iv2, ivec + AES_BLOCK_SIZE);
+            load_block(iv, ivec);
+            load_block(iv2, ivec + AES_BLOCK_SIZE);
 
-			while (len)
-				{
-				load_block(tmp, in);
-				for(n=0 ; n < N_WORDS; ++n)
-					tmp2.data[n] = tmp.data[n] ^ iv.data[n];
-				AES_encrypt((unsigned char *)tmp2.data, (unsigned char *)tmp2.data, key);
-				for(n=0 ; n < N_WORDS; ++n)
-					tmp2.data[n] ^= iv2.data[n];
-				store_block(out, tmp2);
-				iv = tmp2;
-				iv2 = tmp;
-				--len;
-				in += AES_BLOCK_SIZE;
-				out += AES_BLOCK_SIZE;
-				}
-			memcpy(ivec, iv.data, AES_BLOCK_SIZE);
-			memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
-			}
-		}
-	else
-		{
-		if (in != out &&
-		    (UNALIGNED_MEMOPS_ARE_FAST || ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(long)==0))
-			{
-			aes_block_t *ivp = (aes_block_t *)ivec;
-			aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
+            while (len) {
+                load_block(tmp, in);
+                for (n = 0; n < N_WORDS; ++n)
+                    tmp2.data[n] = tmp.data[n] ^ iv.data[n];
+                AES_encrypt((unsigned char *)tmp2.data,
+                            (unsigned char *)tmp2.data, key);
+                for (n = 0; n < N_WORDS; ++n)
+                    tmp2.data[n] ^= iv2.data[n];
+                store_block(out, tmp2);
+                iv = tmp2;
+                iv2 = tmp;
+                --len;
+                in += AES_BLOCK_SIZE;
+                out += AES_BLOCK_SIZE;
+            }
+            memcpy(ivec, iv.data, AES_BLOCK_SIZE);
+            memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
+        }
+    } else {
+        if (in != out &&
+            (UNALIGNED_MEMOPS_ARE_FAST
+             || ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(long) ==
+             0)) {
+            aes_block_t *ivp = (aes_block_t *) ivec;
+            aes_block_t *iv2p = (aes_block_t *) (ivec + AES_BLOCK_SIZE);
 
-			while (len)
-				{
-				aes_block_t tmp;
-				aes_block_t *inp = (aes_block_t *)in;
-				aes_block_t *outp = (aes_block_t *)out;
+            while (len) {
+                aes_block_t tmp;
+                aes_block_t *inp = (aes_block_t *) in;
+                aes_block_t *outp = (aes_block_t *) out;
 
-				for(n=0 ; n < N_WORDS; ++n)
-					tmp.data[n] = inp->data[n] ^ iv2p->data[n];
-				AES_decrypt((unsigned char *)tmp.data, (unsigned char *)outp->data, key);
-				for(n=0 ; n < N_WORDS; ++n)
-					outp->data[n] ^= ivp->data[n];
-				ivp = inp;
-				iv2p = outp;
-				--len;
-				in += AES_BLOCK_SIZE;
-				out += AES_BLOCK_SIZE;
-				}
-			memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
-			memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
-			}
-		else
-			{
-			aes_block_t tmp, tmp2;
-			aes_block_t iv;
-			aes_block_t iv2;
+                for (n = 0; n < N_WORDS; ++n)
+                    tmp.data[n] = inp->data[n] ^ iv2p->data[n];
+                AES_decrypt((unsigned char *)tmp.data,
+                            (unsigned char *)outp->data, key);
+                for (n = 0; n < N_WORDS; ++n)
+                    outp->data[n] ^= ivp->data[n];
+                ivp = inp;
+                iv2p = outp;
+                --len;
+                in += AES_BLOCK_SIZE;
+                out += AES_BLOCK_SIZE;
+            }
+            memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
+            memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
+        } else {
+            aes_block_t tmp, tmp2;
+            aes_block_t iv;
+            aes_block_t iv2;
 
-			load_block(iv, ivec);
-			load_block(iv2, ivec + AES_BLOCK_SIZE);
+            load_block(iv, ivec);
+            load_block(iv2, ivec + AES_BLOCK_SIZE);
 
-			while (len)
-				{
-				load_block(tmp, in);
-				tmp2 = tmp;
-				for(n=0 ; n < N_WORDS; ++n)
-					tmp.data[n] ^= iv2.data[n];
-				AES_decrypt((unsigned char *)tmp.data, (unsigned char *)tmp.data, key);
-				for(n=0 ; n < N_WORDS; ++n)
-					tmp.data[n] ^= iv.data[n];
-				store_block(out, tmp);
-				iv = tmp2;
-				iv2 = tmp;
-				--len;
-				in += AES_BLOCK_SIZE;
-				out += AES_BLOCK_SIZE;
-				}
-			memcpy(ivec, iv.data, AES_BLOCK_SIZE);
-			memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
-			}
-		}
-	}
+            while (len) {
+                load_block(tmp, in);
+                tmp2 = tmp;
+                for (n = 0; n < N_WORDS; ++n)
+                    tmp.data[n] ^= iv2.data[n];
+                AES_decrypt((unsigned char *)tmp.data,
+                            (unsigned char *)tmp.data, key);
+                for (n = 0; n < N_WORDS; ++n)
+                    tmp.data[n] ^= iv.data[n];
+                store_block(out, tmp);
+                iv = tmp2;
+                iv2 = tmp;
+                --len;
+                in += AES_BLOCK_SIZE;
+                out += AES_BLOCK_SIZE;
+            }
+            memcpy(ivec, iv.data, AES_BLOCK_SIZE);
+            memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
+        }
+    }
+}
 
 /*
  * Note that its effectively impossible to do biIGE in anything other
@@ -211,113 +206,118 @@ void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
 /* N.B. The IV for this mode is _four times_ the block size */
 
 void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
-						const unsigned long length, const AES_KEY *key,
-						const AES_KEY *key2, const unsigned char *ivec,
-						const int enc)
-	{
-	unsigned long n;
-	unsigned long len = length;
-	unsigned char tmp[AES_BLOCK_SIZE];
-	unsigned char tmp2[AES_BLOCK_SIZE];
-	unsigned char tmp3[AES_BLOCK_SIZE];
-	unsigned char prev[AES_BLOCK_SIZE];
-	const unsigned char *iv;
-	const unsigned char *iv2;
+                        const unsigned long length, const AES_KEY *key,
+                        const AES_KEY *key2, const unsigned char *ivec,
+                        const int enc)
+{
+    unsigned long n;
+    unsigned long len = length;
+    unsigned char tmp[AES_BLOCK_SIZE];
+    unsigned char tmp2[AES_BLOCK_SIZE];
+    unsigned char tmp3[AES_BLOCK_SIZE];
+    unsigned char prev[AES_BLOCK_SIZE];
+    const unsigned char *iv;
+    const unsigned char *iv2;
 
-	OPENSSL_assert(in && out && key && ivec);
-	OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
-	OPENSSL_assert((length%AES_BLOCK_SIZE) == 0);
+    OPENSSL_assert(in && out && key && ivec);
+    OPENSSL_assert((AES_ENCRYPT == enc) || (AES_DECRYPT == enc));
+    OPENSSL_assert((length % AES_BLOCK_SIZE) == 0);
 
-	if (AES_ENCRYPT == enc)
-		{
-		/* XXX: Do a separate case for when in != out (strictly should
-		   check for overlap, too) */
+    if (AES_ENCRYPT == enc) {
+        /*
+         * XXX: Do a separate case for when in != out (strictly should check
+         * for overlap, too)
+         */
 
-		/* First the forward pass */ 
-		iv = ivec;
-		iv2 = ivec + AES_BLOCK_SIZE;
-		while (len >= AES_BLOCK_SIZE)
-			{
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				out[n] = in[n] ^ iv[n];
-			AES_encrypt(out, out, key);
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				out[n] ^= iv2[n];
-			iv = out;
-			memcpy(prev, in, AES_BLOCK_SIZE);
-			iv2 = prev;
-			len -= AES_BLOCK_SIZE;
-			in += AES_BLOCK_SIZE;
-			out += AES_BLOCK_SIZE;
-			}
+        /* First the forward pass */
+        iv = ivec;
+        iv2 = ivec + AES_BLOCK_SIZE;
+        while (len >= AES_BLOCK_SIZE) {
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                out[n] = in[n] ^ iv[n];
+            AES_encrypt(out, out, key);
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                out[n] ^= iv2[n];
+            iv = out;
+            memcpy(prev, in, AES_BLOCK_SIZE);
+            iv2 = prev;
+            len -= AES_BLOCK_SIZE;
+            in += AES_BLOCK_SIZE;
+            out += AES_BLOCK_SIZE;
+        }
 
-		/* And now backwards */
-		iv = ivec + AES_BLOCK_SIZE*2;
-		iv2 = ivec + AES_BLOCK_SIZE*3;
-		len = length;
-		while(len >= AES_BLOCK_SIZE)
-			{
-			out -= AES_BLOCK_SIZE;
-			/* XXX: reduce copies by alternating between buffers */
-			memcpy(tmp, out, AES_BLOCK_SIZE);
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				out[n] ^= iv[n];
-			/*			hexdump(stdout, "out ^ iv", out, AES_BLOCK_SIZE); */
-			AES_encrypt(out, out, key);
-			/*			hexdump(stdout,"enc", out, AES_BLOCK_SIZE); */
-			/*			hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); */
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				out[n] ^= iv2[n];
-			/*			hexdump(stdout,"out", out, AES_BLOCK_SIZE); */
-			iv = out;
-			memcpy(prev, tmp, AES_BLOCK_SIZE);
-			iv2 = prev;
-			len -= AES_BLOCK_SIZE;
-			}
-		}
-	else
-		{
-		/* First backwards */
-		iv = ivec + AES_BLOCK_SIZE*2;
-		iv2 = ivec + AES_BLOCK_SIZE*3;
-		in += length;
-		out += length;
-		while (len >= AES_BLOCK_SIZE)
-			{
-			in -= AES_BLOCK_SIZE;
-			out -= AES_BLOCK_SIZE;
-			memcpy(tmp, in, AES_BLOCK_SIZE);
-			memcpy(tmp2, in, AES_BLOCK_SIZE);
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				tmp[n] ^= iv2[n];
-			AES_decrypt(tmp, out, key);
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				out[n] ^= iv[n];
-			memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
-			iv = tmp3;
-			iv2 = out;
-			len -= AES_BLOCK_SIZE;
-			}
+        /* And now backwards */
+        iv = ivec + AES_BLOCK_SIZE * 2;
+        iv2 = ivec + AES_BLOCK_SIZE * 3;
+        len = length;
+        while (len >= AES_BLOCK_SIZE) {
+            out -= AES_BLOCK_SIZE;
+            /*
+             * XXX: reduce copies by alternating between buffers
+             */
+            memcpy(tmp, out, AES_BLOCK_SIZE);
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                out[n] ^= iv[n];
+            /*
+             * hexdump(stdout, "out ^ iv", out, AES_BLOCK_SIZE);
+             */
+            AES_encrypt(out, out, key);
+            /*
+             * hexdump(stdout,"enc", out, AES_BLOCK_SIZE);
+             */
+            /*
+             * hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE);
+             */
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                out[n] ^= iv2[n];
+            /*
+             * hexdump(stdout,"out", out, AES_BLOCK_SIZE);
+             */
+            iv = out;
+            memcpy(prev, tmp, AES_BLOCK_SIZE);
+            iv2 = prev;
+            len -= AES_BLOCK_SIZE;
+        }
+    } else {
+        /* First backwards */
+        iv = ivec + AES_BLOCK_SIZE * 2;
+        iv2 = ivec + AES_BLOCK_SIZE * 3;
+        in += length;
+        out += length;
+        while (len >= AES_BLOCK_SIZE) {
+            in -= AES_BLOCK_SIZE;
+            out -= AES_BLOCK_SIZE;
+            memcpy(tmp, in, AES_BLOCK_SIZE);
+            memcpy(tmp2, in, AES_BLOCK_SIZE);
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                tmp[n] ^= iv2[n];
+            AES_decrypt(tmp, out, key);
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                out[n] ^= iv[n];
+            memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
+            iv = tmp3;
+            iv2 = out;
+            len -= AES_BLOCK_SIZE;
+        }
 
-		/* And now forwards */
-		iv = ivec;
-		iv2 = ivec + AES_BLOCK_SIZE;
-		len = length;
-		while (len >= AES_BLOCK_SIZE)
-			{
-			memcpy(tmp, out, AES_BLOCK_SIZE);
-			memcpy(tmp2, out, AES_BLOCK_SIZE);
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				tmp[n] ^= iv2[n];
-			AES_decrypt(tmp, out, key);
-			for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
-				out[n] ^= iv[n];
-			memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
-			iv = tmp3;
-			iv2 = out;
-			len -= AES_BLOCK_SIZE;
-			in += AES_BLOCK_SIZE;
-			out += AES_BLOCK_SIZE;
-			}
-		}
-	}
+        /* And now forwards */
+        iv = ivec;
+        iv2 = ivec + AES_BLOCK_SIZE;
+        len = length;
+        while (len >= AES_BLOCK_SIZE) {
+            memcpy(tmp, out, AES_BLOCK_SIZE);
+            memcpy(tmp2, out, AES_BLOCK_SIZE);
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                tmp[n] ^= iv2[n];
+            AES_decrypt(tmp, out, key);
+            for (n = 0; n < AES_BLOCK_SIZE; ++n)
+                out[n] ^= iv[n];
+            memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
+            iv = tmp3;
+            iv2 = out;
+            len -= AES_BLOCK_SIZE;
+            in += AES_BLOCK_SIZE;
+            out += AES_BLOCK_SIZE;
+        }
+    }
+}