--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/evp/evp_enc.c	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,562 @@
+/* crypto/evp/evp_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 "cryptlib.h"
+#include <openssl/evp.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+#include "evp_locl.h"
+
+const char EVP_version[]="EVP" OPENSSL_VERSION_PTEXT;
+
+EXPORT_C void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
+	{
+	memset(ctx,0,sizeof(EVP_CIPHER_CTX));
+	/* ctx->cipher=NULL; */
+	}
+
+EXPORT_C EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
+	{
+	EVP_CIPHER_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
+	if (ctx)
+		EVP_CIPHER_CTX_init(ctx);
+	return ctx;
+	}
+
+EXPORT_C int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+	     const unsigned char *key, const unsigned char *iv, int enc)
+	{
+	if (cipher)
+		EVP_CIPHER_CTX_init(ctx);
+	return EVP_CipherInit_ex(ctx,cipher,NULL,key,iv,enc);
+	}
+
+EXPORT_C int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
+	     const unsigned char *key, const unsigned char *iv, int enc)
+	{
+	if (enc == -1)
+		enc = ctx->encrypt;
+	else
+		{
+		if (enc)
+			enc = 1;
+		ctx->encrypt = enc;
+		}
+#ifndef OPENSSL_NO_ENGINE
+	/* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
+	 * so this context may already have an ENGINE! Try to avoid releasing
+	 * the previous handle, re-querying for an ENGINE, and having a
+	 * reinitialisation, when it may all be unecessary. */
+	if (ctx->engine && ctx->cipher && (!cipher ||
+			(cipher && (cipher->nid == ctx->cipher->nid))))
+		goto skip_to_init;
+#endif
+	if (cipher)
+		{
+		/* Ensure a context left lying around from last time is cleared
+		 * (the previous check attempted to avoid this if the same
+		 * ENGINE and EVP_CIPHER could be used). */
+		EVP_CIPHER_CTX_cleanup(ctx);
+
+		/* Restore encrypt field: it is zeroed by cleanup */
+		ctx->encrypt = enc;
+#ifndef OPENSSL_NO_ENGINE
+		if(impl)
+			{
+			if (!ENGINE_init(impl))
+				{
+				EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+				return 0;
+				}
+			}
+		else
+			/* Ask if an ENGINE is reserved for this job */
+			impl = ENGINE_get_cipher_engine(cipher->nid);
+		if(impl)
+			{
+			/* There's an ENGINE for this job ... (apparently) */
+			const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
+			if(!c)
+				{
+				/* One positive side-effect of US's export
+				 * control history, is that we should at least
+				 * be able to avoid using US mispellings of
+				 * "initialisation"? */
+				EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+				return 0;
+				}
+			/* We'll use the ENGINE's private cipher definition */
+			cipher = c;
+			/* Store the ENGINE functional reference so we know
+			 * 'cipher' came from an ENGINE and we need to release
+			 * it when done. */
+			ctx->engine = impl;
+			}
+		else
+			ctx->engine = NULL;
+#endif
+
+		ctx->cipher=cipher;
+		if (ctx->cipher->ctx_size)
+			{
+			ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
+			if (!ctx->cipher_data)
+				{
+				EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
+				return 0;
+				}
+			}
+		else
+			{
+			ctx->cipher_data = NULL;
+			}
+		ctx->key_len = cipher->key_len;
+		ctx->flags = 0;
+		if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
+			{
+			if(!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
+				{
+				EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+				return 0;
+				}
+			}
+		}
+	else if(!ctx->cipher)
+		{
+		EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET);
+		return 0;
+		}
+#ifndef OPENSSL_NO_ENGINE
+skip_to_init:
+#endif
+	/* we assume block size is a power of 2 in *cryptUpdate */
+	OPENSSL_assert(ctx->cipher->block_size == 1
+	    || ctx->cipher->block_size == 8
+	    || ctx->cipher->block_size == 16);
+
+	if(!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
+		switch(EVP_CIPHER_CTX_mode(ctx)) {
+
+			case EVP_CIPH_STREAM_CIPHER:
+			case EVP_CIPH_ECB_MODE:
+			break;
+
+			case EVP_CIPH_CFB_MODE:
+			case EVP_CIPH_OFB_MODE:
+
+			ctx->num = 0;
+
+			case EVP_CIPH_CBC_MODE:
+
+			OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
+					(int)sizeof(ctx->iv));
+			if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
+			memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
+			break;
+
+			default:
+			return 0;
+			break;
+		}
+	}
+
+	if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
+		if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
+	}
+	ctx->buf_len=0;
+	ctx->final_used=0;
+	ctx->block_mask=ctx->cipher->block_size-1;
+	return 1;
+	}
+
+EXPORT_C int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+	     const unsigned char *in, int inl)
+	{
+	if (ctx->encrypt)
+		return EVP_EncryptUpdate(ctx,out,outl,in,inl);
+	else	return EVP_DecryptUpdate(ctx,out,outl,in,inl);
+	}
+
+EXPORT_C int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+	{
+	if (ctx->encrypt)
+		return EVP_EncryptFinal_ex(ctx,out,outl);
+	else	return EVP_DecryptFinal_ex(ctx,out,outl);
+	}
+
+EXPORT_C int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+	{
+	if (ctx->encrypt)
+		return EVP_EncryptFinal(ctx,out,outl);
+	else	return EVP_DecryptFinal(ctx,out,outl);
+	}
+
+EXPORT_C int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+	     const unsigned char *key, const unsigned char *iv)
+	{
+	return EVP_CipherInit(ctx, cipher, key, iv, 1);
+	}
+
+EXPORT_C int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
+		const unsigned char *key, const unsigned char *iv)
+	{
+	return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
+	}
+
+EXPORT_C int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+	     const unsigned char *key, const unsigned char *iv)
+	{
+	return EVP_CipherInit(ctx, cipher, key, iv, 0);
+	}
+
+EXPORT_C int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
+	     const unsigned char *key, const unsigned char *iv)
+	{
+	return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
+	}
+
+EXPORT_C int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+	     const unsigned char *in, int inl)
+	{
+	int i,j,bl;
+
+	OPENSSL_assert(inl > 0);
+	if(ctx->buf_len == 0 && (inl&(ctx->block_mask)) == 0)
+		{
+		if(ctx->cipher->do_cipher(ctx,out,in,inl))
+			{
+			*outl=inl;
+			return 1;
+			}
+		else
+			{
+			*outl=0;
+			return 0;
+			}
+		}
+	i=ctx->buf_len;
+	bl=ctx->cipher->block_size;
+	OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
+	if (i != 0)
+		{
+		if (i+inl < bl)
+			{
+			memcpy(&(ctx->buf[i]),in,inl);
+			ctx->buf_len+=inl;
+			*outl=0;
+			return 1;
+			}
+		else
+			{
+			j=bl-i;
+			memcpy(&(ctx->buf[i]),in,j);
+			if(!ctx->cipher->do_cipher(ctx,out,ctx->buf,bl)) return 0;
+			inl-=j;
+			in+=j;
+			out+=bl;
+			*outl=bl;
+			}
+		}
+	else
+		*outl = 0;
+	i=inl&(bl-1);
+	inl-=i;
+	if (inl > 0)
+		{
+		if(!ctx->cipher->do_cipher(ctx,out,in,inl)) return 0;
+		*outl+=inl;
+		}
+
+	if (i != 0)
+		memcpy(ctx->buf,&(in[inl]),i);
+	ctx->buf_len=i;
+	return 1;
+	}
+
+EXPORT_C int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+	{
+	int ret;
+	ret = EVP_EncryptFinal_ex(ctx, out, outl);
+	return ret;
+	}
+
+EXPORT_C int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+	{
+	int n,ret;
+	unsigned int i, b, bl;
+
+	b=ctx->cipher->block_size;
+	OPENSSL_assert(b <= sizeof ctx->buf);
+	if (b == 1)
+		{
+		*outl=0;
+		return 1;
+		}
+	bl=ctx->buf_len;
+	if (ctx->flags & EVP_CIPH_NO_PADDING)
+		{
+		if(bl)
+			{
+			EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+			return 0;
+			}
+		*outl = 0;
+		return 1;
+		}
+
+	n=b-bl;
+	for (i=bl; i<b; i++)
+		ctx->buf[i]=n;
+	ret=ctx->cipher->do_cipher(ctx,out,ctx->buf,b);
+
+
+	if(ret)
+		*outl=b;
+
+	return ret;
+	}
+
+EXPORT_C int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+	     const unsigned char *in, int inl)
+	{
+	int fix_len;
+	unsigned int b;
+
+	if (inl == 0)
+		{
+		*outl=0;
+		return 1;
+		}
+
+	if (ctx->flags & EVP_CIPH_NO_PADDING)
+		return EVP_EncryptUpdate(ctx, out, outl, in, inl);
+
+	b=ctx->cipher->block_size;
+	OPENSSL_assert(b <= sizeof ctx->final);
+
+	if(ctx->final_used)
+		{
+		memcpy(out,ctx->final,b);
+		out+=b;
+		fix_len = 1;
+		}
+	else
+		fix_len = 0;
+
+
+	if(!EVP_EncryptUpdate(ctx,out,outl,in,inl))
+		return 0;
+
+	/* if we have 'decrypted' a multiple of block size, make sure
+	 * we have a copy of this last block */
+	if (b > 1 && !ctx->buf_len)
+		{
+		*outl-=b;
+		ctx->final_used=1;
+		memcpy(ctx->final,&out[*outl],b);
+		}
+	else
+		ctx->final_used = 0;
+
+	if (fix_len)
+		*outl += b;
+		
+	return 1;
+	}
+
+EXPORT_C int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+	{
+	int ret;
+	ret = EVP_DecryptFinal_ex(ctx, out, outl);
+	return ret;
+	}
+
+EXPORT_C int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+	{
+	int i,n;
+	unsigned int b;
+
+	*outl=0;
+	b=ctx->cipher->block_size;
+	if (ctx->flags & EVP_CIPH_NO_PADDING)
+		{
+		if(ctx->buf_len)
+			{
+			EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+			return 0;
+			}
+		*outl = 0;
+		return 1;
+		}
+	if (b > 1)
+		{
+		if (ctx->buf_len || !ctx->final_used)
+			{
+			EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_WRONG_FINAL_BLOCK_LENGTH);
+			return(0);
+			}
+		OPENSSL_assert(b <= sizeof ctx->final);
+		n=ctx->final[b-1];
+		if (n == 0 || n > (int)b)
+			{
+			EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_BAD_DECRYPT);
+			return(0);
+			}
+		for (i=0; i<n; i++)
+			{
+			if (ctx->final[--b] != n)
+				{
+				EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_BAD_DECRYPT);
+				return(0);
+				}
+			}
+		n=ctx->cipher->block_size-n;
+		for (i=0; i<n; i++)
+			out[i]=ctx->final[i];
+		*outl=n;
+		}
+	else
+		*outl=0;
+	return(1);
+	}
+
+EXPORT_C void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
+	{
+	if (ctx)
+		{
+		EVP_CIPHER_CTX_cleanup(ctx);
+		OPENSSL_free(ctx);
+		}
+	}
+EXPORT_C int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
+	{
+	if (c->cipher != NULL)
+		{
+		if(c->cipher->cleanup && !c->cipher->cleanup(c))
+			return 0;
+		/* Cleanse cipher context data */
+		if (c->cipher_data)
+			OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
+		}
+	if (c->cipher_data)
+		OPENSSL_free(c->cipher_data);
+#ifndef OPENSSL_NO_ENGINE
+	if (c->engine)
+		/* The EVP_CIPHER we used belongs to an ENGINE, release the
+		 * functional reference we held for this reason. */
+		ENGINE_finish(c->engine);
+#endif
+	memset(c,0,sizeof(EVP_CIPHER_CTX));
+	return 1;
+	}
+
+EXPORT_C int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
+	{
+	if(c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) 
+		return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
+	if(c->key_len == keylen) return 1;
+	if((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH))
+		{
+		c->key_len = keylen;
+		return 1;
+		}
+	EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH,EVP_R_INVALID_KEY_LENGTH);
+	return 0;
+	}
+
+EXPORT_C int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
+	{
+	if (pad) ctx->flags &= ~EVP_CIPH_NO_PADDING;
+	else ctx->flags |= EVP_CIPH_NO_PADDING;
+	return 1;
+	}
+
+EXPORT_C int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
+{
+	int ret;
+	if(!ctx->cipher) {
+		EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
+		return 0;
+	}
+
+	if(!ctx->cipher->ctrl) {
+		EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
+		return 0;
+	}
+
+	ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
+	if(ret == -1) {
+		EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
+		return 0;
+	}
+	return ret;
+}
+
+EXPORT_C int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
+	{
+	if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
+		return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
+	if (RAND_bytes(key, ctx->key_len) <= 0)
+		return 0;
+	return 1;
+	}
+