evp/e_des3.c: fix typo with potential integer overflow on 32-bit platforms.

Submitted by: Yuriy Kaminskiy

crypto/evp/e_des3.c

@@ -121,7 +121,7 @@ static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 			      const unsigned char *in, size_t inl)
 {
-	if (inl>=EVP_MAXCHUNK)
+	while (inl>=EVP_MAXCHUNK)
 		{
 		DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
 			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
@@ -160,7 +160,7 @@ static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 		return 1;
 		}
 
-	if (inl>=EVP_MAXCHUNK)
+	while (inl>=EVP_MAXCHUNK)
 		{
 		DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
 			     &dat->ks1, &dat->ks2, &dat->ks3,
@@ -179,7 +179,7 @@ static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 			      const unsigned char *in, size_t inl)
 {
-	if (inl>=EVP_MAXCHUNK)
+	while (inl>=EVP_MAXCHUNK)
 		{
 		DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, 
 			       &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,