X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fevp%2Fbio_enc.c;h=629bf4b95d9675db4d2e0fb21a548af3ccc3a0bc;hb=8d5b4ee1cab7cd02f9fe246fb60d7d018a315a86;hp=9aaba043c9263db6a8c50c30fb0dddc82f7dc893;hpb=ec577822f95a8bca0023c5c77cef1a4916822d4a;p=oweals%2Fopenssl.git

diff --git a/crypto/evp/bio_enc.c b/crypto/evp/bio_enc.c
index 9aaba043c9..629bf4b95d 100644
--- a/crypto/evp/bio_enc.c
+++ b/crypto/evp/bio_enc.c
@@ -62,7 +62,6 @@
 #include <openssl/buffer.h>
 #include <openssl/evp.h>
 
-#ifndef NOPROTO
 static int enc_write(BIO *h,char *buf,int num);
 static int enc_read(BIO *h,char *buf,int size);
 /*static int enc_puts(BIO *h,char *str); */
@@ -70,16 +69,7 @@ static int enc_read(BIO *h,char *buf,int size);
 static long enc_ctrl(BIO *h,int cmd,long arg1,char *arg2);
 static int enc_new(BIO *h);
 static int enc_free(BIO *data);
-#else
-static int enc_write();
-static int enc_read();
-/*static int enc_puts(); */
-/*static int enc_gets(); */
-static long enc_ctrl();
-static int enc_new();
-static int enc_free();
-#endif
-
+static long enc_callback_ctrl(BIO *h,int cmd,void (*fp)());
 #define ENC_BLOCK_SIZE	(1024*4)
 
 typedef struct enc_struct
@@ -103,6 +93,7 @@ static BIO_METHOD methods_enc=
 	enc_ctrl,
 	enc_new,
 	enc_free,
+	enc_callback_ctrl,
 	};
 
 BIO_METHOD *BIO_f_cipher(void)
@@ -195,9 +186,11 @@ static int enc_read(BIO *b, char *out, int outl)
 				ctx->ok=i;
 				ctx->buf_off=0;
 				}
-			else
+			else 
+				{
 				ret=(ret == 0)?i:ret;
-			break;
+				break;
+				}
 			}
 		else
 			{
@@ -205,13 +198,19 @@ static int enc_read(BIO *b, char *out, int outl)
 				(unsigned char *)ctx->buf,&ctx->buf_len,
 				(unsigned char *)&(ctx->buf[8]),i);
 			ctx->cont=1;
+			/* Note: it is possible for EVP_CipherUpdate to
+			 * decrypt zero bytes because this is or looks like
+			 * the final block: if this happens we should retry
+			 * and either read more data or decrypt the final
+			 * block
+			 */
+			if(ctx->buf_len == 0) continue;
 			}
 
 		if (ctx->buf_len <= outl)
 			i=ctx->buf_len;
 		else
 			i=outl;
-
 		if (i <= 0) break;
 		memcpy(out,ctx->buf,i);
 		ret+=i;
@@ -371,6 +370,20 @@ again:
 	return(ret);
 	}
 
+static long enc_callback_ctrl(BIO *b, int cmd, void (*fp)())
+	{
+	long ret=1;
+
+	if (b->next_bio == NULL) return(0);
+	switch (cmd)
+		{
+	default:
+		ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
+		break;
+		}
+	return(ret);
+	}
+
 /*
 void BIO_set_cipher_ctx(b,c)
 BIO *b;