1 files changed, 426 insertions, 0 deletions

diff --git a/openssl/crypto/evp/bio_enc.c b/openssl/crypto/evp/bio_enc.c
new file mode 100644
index 000000000..f6ac94c6e
--- /dev/null
+++ b/openssl/crypto/evp/bio_enc.c
@@ -0,0 +1,426 @@
+/* crypto/evp/bio_enc.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    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 the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include "cryptlib.h"
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+
+static int enc_write(BIO *h, const char *buf, int num);
+static int enc_read(BIO *h, char *buf, int size);
+/*static int enc_puts(BIO *h, const char *str); */
+/*static int enc_gets(BIO *h, char *str, int size); */
+static long enc_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int enc_new(BIO *h);
+static int enc_free(BIO *data);
+static long enc_callback_ctrl(BIO *h, int cmd, bio_info_cb *fps);
+#define ENC_BLOCK_SIZE	(1024*4)
+#define BUF_OFFSET	(EVP_MAX_BLOCK_LENGTH*2)
+
+typedef struct enc_struct
+	{
+	int buf_len;
+	int buf_off;
+	int cont;		/* <= 0 when finished */
+	int finished;
+	int ok;			/* bad decrypt */
+	EVP_CIPHER_CTX cipher;
+	/* buf is larger than ENC_BLOCK_SIZE because EVP_DecryptUpdate
+	 * can return up to a block more data than is presented to it
+	 */
+	char buf[ENC_BLOCK_SIZE+BUF_OFFSET+2];
+	} BIO_ENC_CTX;
+
+static BIO_METHOD methods_enc=
+	{
+	BIO_TYPE_CIPHER,"cipher",
+	enc_write,
+	enc_read,
+	NULL, /* enc_puts, */
+	NULL, /* enc_gets, */
+	enc_ctrl,
+	enc_new,
+	enc_free,
+	enc_callback_ctrl,
+	};
+
+BIO_METHOD *BIO_f_cipher(void)
+	{
+	return(&methods_enc);
+	}
+
+static int enc_new(BIO *bi)
+	{
+	BIO_ENC_CTX *ctx;
+
+	ctx=(BIO_ENC_CTX *)OPENSSL_malloc(sizeof(BIO_ENC_CTX));
+	if (ctx == NULL) return(0);
+	EVP_CIPHER_CTX_init(&ctx->cipher);
+
+	ctx->buf_len=0;
+	ctx->buf_off=0;
+	ctx->cont=1;
+	ctx->finished=0;
+	ctx->ok=1;
+
+	bi->init=0;
+	bi->ptr=(char *)ctx;
+	bi->flags=0;
+	return(1);
+	}
+
+static int enc_free(BIO *a)
+	{
+	BIO_ENC_CTX *b;
+
+	if (a == NULL) return(0);
+	b=(BIO_ENC_CTX *)a->ptr;
+	EVP_CIPHER_CTX_cleanup(&(b->cipher));
+	OPENSSL_cleanse(a->ptr,sizeof(BIO_ENC_CTX));
+	OPENSSL_free(a->ptr);
+	a->ptr=NULL;
+	a->init=0;
+	a->flags=0;
+	return(1);
+	}
+	
+static int enc_read(BIO *b, char *out, int outl)
+	{
+	int ret=0,i;
+	BIO_ENC_CTX *ctx;
+
+	if (out == NULL) return(0);
+	ctx=(BIO_ENC_CTX *)b->ptr;
+
+	if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
+
+	/* First check if there are bytes decoded/encoded */
+	if (ctx->buf_len > 0)
+		{
+		i=ctx->buf_len-ctx->buf_off;
+		if (i > outl) i=outl;
+		memcpy(out,&(ctx->buf[ctx->buf_off]),i);
+		ret=i;
+		out+=i;
+		outl-=i;
+		ctx->buf_off+=i;
+		if (ctx->buf_len == ctx->buf_off)
+			{
+			ctx->buf_len=0;
+			ctx->buf_off=0;
+			}
+		}
+
+	/* At this point, we have room of outl bytes and an empty
+	 * buffer, so we should read in some more. */
+
+	while (outl > 0)
+		{
+		if (ctx->cont <= 0) break;
+
+		/* read in at IV offset, read the EVP_Cipher
+		 * documentation about why */
+		i=BIO_read(b->next_bio,&(ctx->buf[BUF_OFFSET]),ENC_BLOCK_SIZE);
+
+		if (i <= 0)
+			{
+			/* Should be continue next time we are called? */
+			if (!BIO_should_retry(b->next_bio))
+				{
+				ctx->cont=i;
+				i=EVP_CipherFinal_ex(&(ctx->cipher),
+					(unsigned char *)ctx->buf,
+					&(ctx->buf_len));
+				ctx->ok=i;
+				ctx->buf_off=0;
+				}
+			else 
+				{
+				ret=(ret == 0)?i:ret;
+				break;
+				}
+			}
+		else
+			{
+			EVP_CipherUpdate(&(ctx->cipher),
+				(unsigned char *)ctx->buf,&ctx->buf_len,
+				(unsigned char *)&(ctx->buf[BUF_OFFSET]),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;
+		ctx->buf_off=i;
+		outl-=i;
+		out+=i;
+		}
+
+	BIO_clear_retry_flags(b);
+	BIO_copy_next_retry(b);
+	return((ret == 0)?ctx->cont:ret);
+	}
+
+static int enc_write(BIO *b, const char *in, int inl)
+	{
+	int ret=0,n,i;
+	BIO_ENC_CTX *ctx;
+
+	ctx=(BIO_ENC_CTX *)b->ptr;
+	ret=inl;
+
+	BIO_clear_retry_flags(b);
+	n=ctx->buf_len-ctx->buf_off;
+	while (n > 0)
+		{
+		i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
+		if (i <= 0)
+			{
+			BIO_copy_next_retry(b);
+			return(i);
+			}
+		ctx->buf_off+=i;
+		n-=i;
+		}
+	/* at this point all pending data has been written */
+
+	if ((in == NULL) || (inl <= 0)) return(0);
+
+	ctx->buf_off=0;
+	while (inl > 0)
+		{
+		n=(inl > ENC_BLOCK_SIZE)?ENC_BLOCK_SIZE:inl;
+		EVP_CipherUpdate(&(ctx->cipher),
+			(unsigned char *)ctx->buf,&ctx->buf_len,
+			(unsigned char *)in,n);
+		inl-=n;
+		in+=n;
+
+		ctx->buf_off=0;
+		n=ctx->buf_len;
+		while (n > 0)
+			{
+			i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
+			if (i <= 0)
+				{
+				BIO_copy_next_retry(b);
+				return (ret == inl) ? i : ret - inl;
+				}
+			n-=i;
+			ctx->buf_off+=i;
+			}
+		ctx->buf_len=0;
+		ctx->buf_off=0;
+		}
+	BIO_copy_next_retry(b);
+	return(ret);
+	}
+
+static long enc_ctrl(BIO *b, int cmd, long num, void *ptr)
+	{
+	BIO *dbio;
+	BIO_ENC_CTX *ctx,*dctx;
+	long ret=1;
+	int i;
+	EVP_CIPHER_CTX **c_ctx;
+
+	ctx=(BIO_ENC_CTX *)b->ptr;
+
+	switch (cmd)
+		{
+	case BIO_CTRL_RESET:
+		ctx->ok=1;
+		ctx->finished=0;
+		EVP_CipherInit_ex(&(ctx->cipher),NULL,NULL,NULL,NULL,
+			ctx->cipher.encrypt);
+		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		break;
+	case BIO_CTRL_EOF:	/* More to read */
+		if (ctx->cont <= 0)
+			ret=1;
+		else
+			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		break;
+	case BIO_CTRL_WPENDING:
+		ret=ctx->buf_len-ctx->buf_off;
+		if (ret <= 0)
+			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		break;
+	case BIO_CTRL_PENDING: /* More to read in buffer */
+		ret=ctx->buf_len-ctx->buf_off;
+		if (ret <= 0)
+			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		break;
+	case BIO_CTRL_FLUSH:
+		/* do a final write */
+again:
+		while (ctx->buf_len != ctx->buf_off)
+			{
+			i=enc_write(b,NULL,0);
+			if (i < 0)
+				return i;
+			}
+
+		if (!ctx->finished)
+			{
+			ctx->finished=1;
+			ctx->buf_off=0;
+			ret=EVP_CipherFinal_ex(&(ctx->cipher),
+				(unsigned char *)ctx->buf,
+				&(ctx->buf_len));
+			ctx->ok=(int)ret;
+			if (ret <= 0) break;
+
+			/* push out the bytes */
+			goto again;
+			}
+		
+		/* Finally flush the underlying BIO */
+		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		break;
+	case BIO_C_GET_CIPHER_STATUS:
+		ret=(long)ctx->ok;
+		break;
+	case BIO_C_DO_STATE_MACHINE:
+		BIO_clear_retry_flags(b);
+		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		BIO_copy_next_retry(b);
+		break;
+	case BIO_C_GET_CIPHER_CTX:
+		c_ctx=(EVP_CIPHER_CTX **)ptr;
+		(*c_ctx)= &(ctx->cipher);
+		b->init=1;
+		break;
+	case BIO_CTRL_DUP:
+		dbio=(BIO *)ptr;
+		dctx=(BIO_ENC_CTX *)dbio->ptr;
+		memcpy(&(dctx->cipher),&(ctx->cipher),sizeof(ctx->cipher));
+		dbio->init=1;
+		break;
+	default:
+		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		break;
+		}
+	return(ret);
+	}
+
+static long enc_callback_ctrl(BIO *b, int cmd, bio_info_cb *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;
+EVP_CIPHER_ctx *c;
+	{
+	if (b == NULL) return;
+
+	if ((b->callback != NULL) &&
+		(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
+		return;
+
+	b->init=1;
+	ctx=(BIO_ENC_CTX *)b->ptr;
+	memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
+	
+	if (b->callback != NULL)
+		b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
+	}
+*/
+
+void BIO_set_cipher(BIO *b, const EVP_CIPHER *c, const unsigned char *k,
+	     const unsigned char *i, int e)
+	{
+	BIO_ENC_CTX *ctx;
+
+	if (b == NULL) return;
+
+	if ((b->callback != NULL) &&
+		(b->callback(b,BIO_CB_CTRL,(const char *)c,BIO_CTRL_SET,e,0L) <= 0))
+		return;
+
+	b->init=1;
+	ctx=(BIO_ENC_CTX *)b->ptr;
+	EVP_CipherInit_ex(&(ctx->cipher),c,NULL, k,i,e);
+	
+	if (b->callback != NULL)
+		b->callback(b,BIO_CB_CTRL,(const char *)c,BIO_CTRL_SET,e,1L);
+	}
+