Import of old SSLeay release: SSLeay 0.8.1b

1 files changed, 452 insertions, 0 deletions

diff --git a/crypto/evp/bio_b64.c b/crypto/evp/bio_b64.c
new file mode 100644
index 0000000..e362dc3
--- /dev/null
+++ b/crypto/evp/bio_b64.c
@@ -0,0 +1,452 @@
+/* crypto/evp/bio_b64.c */
+/* Copyright (C) 1995-1997 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 "buffer.h"
+#include "evp.h"
+
+#ifndef NOPROTO
+static int b64_write(BIO *h,char *buf,int num);
+static int b64_read(BIO *h,char *buf,int size);
+/*static int b64_puts(BIO *h,char *str); */
+/*static int b64_gets(BIO *h,char *str,int size); */
+static long b64_ctrl(BIO *h,int cmd,long arg1,char *arg2);
+static int b64_new(BIO *h);
+static int b64_free(BIO *data);
+#else
+static int b64_write();
+static int b64_read();
+/*static int b64_puts(); */
+/*static int b64_gets(); */
+static long b64_ctrl();
+static int b64_new();
+static int b64_free();
+#endif
+
+#define B64_BLOCK_SIZE	1024
+#define B64_NONE	0
+#define B64_ENCODE	1
+#define B64_DECODE	2
+
+typedef struct b64_struct
+	{
+	/*BIO *bio; moved to the BIO structure */
+	int buf_len;
+	int buf_off;
+	int tmp_len;		/* used to find the start when decoding */
+	int tmp_nl;		/* If true, scan until '\n' */
+	int encode;
+	int start;		/* have we started decoding yet? */
+	int cont;		/* <= 0 when finished */
+	EVP_ENCODE_CTX base64;
+	char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE)+10];
+	char tmp[B64_BLOCK_SIZE];
+	} BIO_B64_CTX;
+
+static BIO_METHOD methods_b64=
+	{
+	BIO_TYPE_BASE64,"base64 encoding",
+	b64_write,
+	b64_read,
+	NULL, /* b64_puts, */
+	NULL, /* b64_gets, */
+	b64_ctrl,
+	b64_new,
+	b64_free,
+	};
+
+BIO_METHOD *BIO_f_base64()
+	{
+	return(&methods_b64);
+	}
+
+static int b64_new(bi)
+BIO *bi;
+	{
+	BIO_B64_CTX *ctx;
+
+	ctx=(BIO_B64_CTX *)Malloc(sizeof(BIO_B64_CTX));
+	if (ctx == NULL) return(0);
+
+	ctx->buf_len=0;
+	ctx->tmp_len=0;
+	ctx->tmp_nl=0;
+	ctx->buf_off=0;
+	ctx->cont=1;
+	ctx->start=1;
+	ctx->encode=0;
+
+	bi->init=1;
+	bi->ptr=(char *)ctx;
+	bi->flags=0;
+	return(1);
+	}
+
+static int b64_free(a)
+BIO *a;
+	{
+	if (a == NULL) return(0);
+	Free(a->ptr);
+	a->ptr=NULL;
+	a->init=0;
+	a->flags=0;
+	return(1);
+	}
+	
+static int b64_read(b,out,outl)
+BIO *b;
+char *out;
+int outl;
+	{
+	int ret=0,i,ii,j,k,x,n,num;
+	BIO_B64_CTX *ctx;
+	unsigned char *p,*q;
+
+	if (out == NULL) return(0);
+	ctx=(BIO_B64_CTX *)b->ptr;
+
+	if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
+
+	if (ctx->encode != B64_DECODE)
+		{
+		ctx->encode=B64_DECODE;
+		ctx->buf_len=0;
+		ctx->buf_off=0;
+		EVP_DecodeInit(&(ctx->base64));
+		}
+
+	/* 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;
+
+		i=BIO_read(b->next_bio,&(ctx->tmp[ctx->tmp_len]),
+			B64_BLOCK_SIZE-ctx->tmp_len);
+
+		if (i <= 0)
+			{
+			/* Should be continue next time we are called? */
+			if (!BIO_should_retry(b->next_bio))
+				ctx->cont=i;
+			break;
+			}
+		i+=ctx->tmp_len;
+
+		/* We need to scan, a line at a time until we
+		 * have a valid line if we are starting. */
+		if (ctx->start)
+			{
+			q=p=(unsigned char *)ctx->tmp;
+			for (j=0; j<i; j++)
+				{
+				if (*(q++) != '\n') continue;
+
+				/* due to a previous very long line,
+				 * we need to keep on scanning for a '\n'
+				 * before we even start looking for
+				 * base64 encoded stuff. */
+				if (ctx->tmp_nl)
+					{
+					p=q;
+					ctx->tmp_nl=0;
+					continue;
+					}
+
+				k=EVP_DecodeUpdate(&(ctx->base64),
+					(unsigned char *)ctx->buf,
+					&num,p,q-p);
+				if ((k <= 0) && (num == 0) && (ctx->start))
+					EVP_DecodeInit(&ctx->base64);
+				else 
+					{
+					if (p != (unsigned char *)
+						&(ctx->tmp[0]))
+						{
+						i-=(p- (unsigned char *)
+							&(ctx->tmp[0]));
+						for (x=0; x < i; x++)
+							ctx->tmp[x]=p[x];
+						EVP_DecodeInit(&ctx->base64);
+						}
+					ctx->start=0;
+					break;
+					}
+				p=q;
+				}
+
+			/* we fell off the end without starting */
+			if (j == i)
+				{
+				/* Is this is one long chunk?, if so, keep on
+				 * reading until a new line. */
+				if (p == (unsigned char *)&(ctx->tmp[0]))
+					{
+					ctx->tmp_nl=1;
+					ctx->tmp_len=0;
+					}
+				else if (p != q) /* finished on a '\n' */
+					{
+					n=q-p;
+					for (ii=0; ii<n; ii++)
+						ctx->tmp[ii]=p[ii];
+					ctx->tmp_len=n;
+					}
+				/* else finished on a '\n' */
+				continue;
+				}
+			else
+				ctx->tmp_len=0;
+			}
+		i=EVP_DecodeUpdate(&(ctx->base64),
+			(unsigned char *)ctx->buf,&ctx->buf_len,
+			(unsigned char *)ctx->tmp,i);
+		ctx->cont=i;
+		ctx->buf_off=0;
+		if (i < 0)
+			{
+			ctx->buf_len=0;
+			break;
+			}
+
+		if (ctx->buf_len <= outl)
+			i=ctx->buf_len;
+		else
+			i=outl;
+
+		memcpy(out,ctx->buf,i);
+		ret+=i;
+		ctx->buf_off=i;
+		if (ctx->buf_off == ctx->buf_len)
+			{
+			ctx->buf_len=0;
+			ctx->buf_off=0;
+			}
+		outl-=i;
+		out+=i;
+		}
+	BIO_clear_retry_flags(b);
+	BIO_copy_next_retry(b);
+	return((ret == 0)?ctx->cont:ret);
+	}
+
+static int b64_write(b,in,inl)
+BIO *b;
+char *in;
+int inl;
+	{
+	int ret=inl,n,i;
+	BIO_B64_CTX *ctx;
+
+	ctx=(BIO_B64_CTX *)b->ptr;
+	BIO_clear_retry_flags(b);
+
+	if (ctx->encode != B64_ENCODE)
+		{
+		ctx->encode=B64_ENCODE;
+		ctx->buf_len=0;
+		ctx->buf_off=0;
+		EVP_EncodeInit(&(ctx->base64));
+		}
+
+	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 > B64_BLOCK_SIZE)?B64_BLOCK_SIZE:inl;
+		EVP_EncodeUpdate(&(ctx->base64),
+			(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 == 0)?i:ret);
+				}
+			n-=i;
+			ctx->buf_off+=i;
+			}
+		ctx->buf_len=0;
+		ctx->buf_off=0;
+		}
+	return(ret);
+	}
+
+static long b64_ctrl(b,cmd,num,ptr)
+BIO *b;
+int cmd;
+long num;
+char *ptr;
+	{
+	BIO_B64_CTX *ctx;
+	long ret=1;
+	int i;
+
+	ctx=(BIO_B64_CTX *)b->ptr;
+
+	switch (cmd)
+		{
+	case BIO_CTRL_RESET:
+		ctx->cont=1;
+		ctx->start=1;
+		ctx->encode=B64_NONE;
+		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: /* More to write in buffer */
+		ret=ctx->buf_len-ctx->buf_off;
+		if ((ret == 0) && (ctx->base64.num != 0))
+			ret=1;
+		else 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=b64_write(b,NULL,0);
+			if (i < 0)
+				{
+				ret=i;
+				break;
+				}
+			}
+		if (ctx->base64.num != 0)
+			{
+			ctx->buf_off=0;
+			EVP_EncodeFinal(&(ctx->base64),
+				(unsigned char *)ctx->buf,
+				&(ctx->buf_len));
+			/* push out the bytes */
+			goto again;
+			}
+		/* Finally flush the underlying BIO */
+		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		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_CTRL_DUP:
+		break;
+	case BIO_CTRL_INFO:
+	case BIO_CTRL_GET:
+	case BIO_CTRL_SET:
+	default:
+		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+		break;
+		}
+	return(ret);
+	}
+