e_rc4_hmac_md5.c: last commit was inappropriate for non-x86[_64] platforms.

PR: 2792

crypto/evp/e_rc4_hmac_md5.c

@@ -121,6 +121,7 @@ static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 		md5_off = MD5_CBLOCK-key->md.num,
 		blocks;
 	unsigned int l;
+	extern unsigned int OPENSSL_ia32cap_P[];
 #endif
 	size_t	plen = key->payload_length;
 
@@ -132,7 +133,8 @@ static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 		/* cipher has to "fall behind" */
 		if (rc4_off>md5_off) md5_off+=MD5_CBLOCK;
 
-		if (plen>md5_off && (blocks=(plen-md5_off)/MD5_CBLOCK)) {
+		if (plen>md5_off && (blocks=(plen-md5_off)/MD5_CBLOCK) &&
+		    (OPENSSL_ia32cap_P[0]&(1<<20))==0) {
 			MD5_Update(&key->md,in,md5_off);
 			RC4(&key->ks,rc4_off,in,out);
 
@@ -172,7 +174,8 @@ static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 		if (md5_off>rc4_off)	rc4_off += 2*MD5_CBLOCK;
 		else			rc4_off += MD5_CBLOCK;
 
-		if (len>rc4_off && (blocks=(len-rc4_off)/MD5_CBLOCK)) {
+		if (len>rc4_off && (blocks=(len-rc4_off)/MD5_CBLOCK) &&
+		    (OPENSSL_ia32cap_P[0]&(1<<20))==0) {
 			RC4(&key->ks,rc4_off,in,out);
 			MD5_Update(&key->md,out,md5_off);
 
@@ -289,8 +292,6 @@ static EVP_CIPHER r4_hmac_md5_cipher=
 
 const EVP_CIPHER *EVP_rc4_hmac_md5(void)
 	{
-	extern unsigned int OPENSSL_ia32cap_P[];
-	/* RC4_CHAR flag ------------vvvvv */
-	return(OPENSSL_ia32cap_P[0]&(1<<20) ? NULL : &r4_hmac_md5_cipher);
+	return(&r4_hmac_md5_cipher);
 	}
 #endif