1*0Sstevel@tonic-gate /* crypto/evp/encode.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate  * All rights reserved.
4*0Sstevel@tonic-gate  *
5*0Sstevel@tonic-gate  * This package is an SSL implementation written
6*0Sstevel@tonic-gate  * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate  * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate  * the following conditions are aheared to.  The following conditions
11*0Sstevel@tonic-gate  * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13*0Sstevel@tonic-gate  * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate  *
16*0Sstevel@tonic-gate  * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate  * the code are not to be removed.
18*0Sstevel@tonic-gate  * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate  * as the author of the parts of the library used.
20*0Sstevel@tonic-gate  * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate  * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate  *
23*0Sstevel@tonic-gate  * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate  * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate  * are met:
26*0Sstevel@tonic-gate  * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate  * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate  *    documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate  * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate  *    must display the following acknowledgement:
33*0Sstevel@tonic-gate  *    "This product includes cryptographic software written by
34*0Sstevel@tonic-gate  *     Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate  *    The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate  *    being used are not cryptographic related :-).
37*0Sstevel@tonic-gate  * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate  *    the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate  *
41*0Sstevel@tonic-gate  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate  * SUCH DAMAGE.
52*0Sstevel@tonic-gate  *
53*0Sstevel@tonic-gate  * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55*0Sstevel@tonic-gate  * copied and put under another distribution licence
56*0Sstevel@tonic-gate  * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate  */
58*0Sstevel@tonic-gate 
59*0Sstevel@tonic-gate #include <stdio.h>
60*0Sstevel@tonic-gate #include "cryptlib.h"
61*0Sstevel@tonic-gate #include <openssl/evp.h>
62*0Sstevel@tonic-gate 
63*0Sstevel@tonic-gate #ifndef CHARSET_EBCDIC
64*0Sstevel@tonic-gate #define conv_bin2ascii(a)	(data_bin2ascii[(a)&0x3f])
65*0Sstevel@tonic-gate #define conv_ascii2bin(a)	(data_ascii2bin[(a)&0x7f])
66*0Sstevel@tonic-gate #else
67*0Sstevel@tonic-gate /* We assume that PEM encoded files are EBCDIC files
68*0Sstevel@tonic-gate  * (i.e., printable text files). Convert them here while decoding.
69*0Sstevel@tonic-gate  * When encoding, output is EBCDIC (text) format again.
70*0Sstevel@tonic-gate  * (No need for conversion in the conv_bin2ascii macro, as the
71*0Sstevel@tonic-gate  * underlying textstring data_bin2ascii[] is already EBCDIC)
72*0Sstevel@tonic-gate  */
73*0Sstevel@tonic-gate #define conv_bin2ascii(a)	(data_bin2ascii[(a)&0x3f])
74*0Sstevel@tonic-gate #define conv_ascii2bin(a)	(data_ascii2bin[os_toascii[a]&0x7f])
75*0Sstevel@tonic-gate #endif
76*0Sstevel@tonic-gate 
77*0Sstevel@tonic-gate /* 64 char lines
78*0Sstevel@tonic-gate  * pad input with 0
79*0Sstevel@tonic-gate  * left over chars are set to =
80*0Sstevel@tonic-gate  * 1 byte  => xx==
81*0Sstevel@tonic-gate  * 2 bytes => xxx=
82*0Sstevel@tonic-gate  * 3 bytes => xxxx
83*0Sstevel@tonic-gate  */
84*0Sstevel@tonic-gate #define BIN_PER_LINE    (64/4*3)
85*0Sstevel@tonic-gate #define CHUNKS_PER_LINE (64/4)
86*0Sstevel@tonic-gate #define CHAR_PER_LINE   (64+1)
87*0Sstevel@tonic-gate 
88*0Sstevel@tonic-gate static unsigned char data_bin2ascii[65]="ABCDEFGHIJKLMNOPQRSTUVWXYZ\
89*0Sstevel@tonic-gate abcdefghijklmnopqrstuvwxyz0123456789+/";
90*0Sstevel@tonic-gate 
91*0Sstevel@tonic-gate /* 0xF0 is a EOLN
92*0Sstevel@tonic-gate  * 0xF1 is ignore but next needs to be 0xF0 (for \r\n processing).
93*0Sstevel@tonic-gate  * 0xF2 is EOF
94*0Sstevel@tonic-gate  * 0xE0 is ignore at start of line.
95*0Sstevel@tonic-gate  * 0xFF is error
96*0Sstevel@tonic-gate  */
97*0Sstevel@tonic-gate 
98*0Sstevel@tonic-gate #define B64_EOLN		0xF0
99*0Sstevel@tonic-gate #define B64_CR			0xF1
100*0Sstevel@tonic-gate #define B64_EOF			0xF2
101*0Sstevel@tonic-gate #define B64_WS			0xE0
102*0Sstevel@tonic-gate #define B64_ERROR       	0xFF
103*0Sstevel@tonic-gate #define B64_NOT_BASE64(a)	(((a)|0x13) == 0xF3)
104*0Sstevel@tonic-gate 
105*0Sstevel@tonic-gate static unsigned char data_ascii2bin[128]={
106*0Sstevel@tonic-gate 	0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
107*0Sstevel@tonic-gate 	0xFF,0xE0,0xF0,0xFF,0xFF,0xF1,0xFF,0xFF,
108*0Sstevel@tonic-gate 	0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
109*0Sstevel@tonic-gate 	0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
110*0Sstevel@tonic-gate 	0xE0,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
111*0Sstevel@tonic-gate 	0xFF,0xFF,0xFF,0x3E,0xFF,0xF2,0xFF,0x3F,
112*0Sstevel@tonic-gate 	0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,
113*0Sstevel@tonic-gate 	0x3C,0x3D,0xFF,0xFF,0xFF,0x00,0xFF,0xFF,
114*0Sstevel@tonic-gate 	0xFF,0x00,0x01,0x02,0x03,0x04,0x05,0x06,
115*0Sstevel@tonic-gate 	0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,
116*0Sstevel@tonic-gate 	0x0F,0x10,0x11,0x12,0x13,0x14,0x15,0x16,
117*0Sstevel@tonic-gate 	0x17,0x18,0x19,0xFF,0xFF,0xFF,0xFF,0xFF,
118*0Sstevel@tonic-gate 	0xFF,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20,
119*0Sstevel@tonic-gate 	0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,
120*0Sstevel@tonic-gate 	0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,
121*0Sstevel@tonic-gate 	0x31,0x32,0x33,0xFF,0xFF,0xFF,0xFF,0xFF,
122*0Sstevel@tonic-gate 	};
123*0Sstevel@tonic-gate 
124*0Sstevel@tonic-gate void EVP_EncodeInit(EVP_ENCODE_CTX *ctx)
125*0Sstevel@tonic-gate 	{
126*0Sstevel@tonic-gate 	ctx->length=48;
127*0Sstevel@tonic-gate 	ctx->num=0;
128*0Sstevel@tonic-gate 	ctx->line_num=0;
129*0Sstevel@tonic-gate 	}
130*0Sstevel@tonic-gate 
131*0Sstevel@tonic-gate void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
132*0Sstevel@tonic-gate 	     unsigned char *in, int inl)
133*0Sstevel@tonic-gate 	{
134*0Sstevel@tonic-gate 	int i,j;
135*0Sstevel@tonic-gate 	unsigned int total=0;
136*0Sstevel@tonic-gate 
137*0Sstevel@tonic-gate 	*outl=0;
138*0Sstevel@tonic-gate 	if (inl == 0) return;
139*0Sstevel@tonic-gate 	OPENSSL_assert(ctx->length <= sizeof ctx->enc_data);
140*0Sstevel@tonic-gate 	if ((ctx->num+inl) < ctx->length)
141*0Sstevel@tonic-gate 		{
142*0Sstevel@tonic-gate 		memcpy(&(ctx->enc_data[ctx->num]),in,inl);
143*0Sstevel@tonic-gate 		ctx->num+=inl;
144*0Sstevel@tonic-gate 		return;
145*0Sstevel@tonic-gate 		}
146*0Sstevel@tonic-gate 	if (ctx->num != 0)
147*0Sstevel@tonic-gate 		{
148*0Sstevel@tonic-gate 		i=ctx->length-ctx->num;
149*0Sstevel@tonic-gate 		memcpy(&(ctx->enc_data[ctx->num]),in,i);
150*0Sstevel@tonic-gate 		in+=i;
151*0Sstevel@tonic-gate 		inl-=i;
152*0Sstevel@tonic-gate 		j=EVP_EncodeBlock(out,ctx->enc_data,ctx->length);
153*0Sstevel@tonic-gate 		ctx->num=0;
154*0Sstevel@tonic-gate 		out+=j;
155*0Sstevel@tonic-gate 		*(out++)='\n';
156*0Sstevel@tonic-gate 		*out='\0';
157*0Sstevel@tonic-gate 		total=j+1;
158*0Sstevel@tonic-gate 		}
159*0Sstevel@tonic-gate 	while (inl >= ctx->length)
160*0Sstevel@tonic-gate 		{
161*0Sstevel@tonic-gate 		j=EVP_EncodeBlock(out,in,ctx->length);
162*0Sstevel@tonic-gate 		in+=ctx->length;
163*0Sstevel@tonic-gate 		inl-=ctx->length;
164*0Sstevel@tonic-gate 		out+=j;
165*0Sstevel@tonic-gate 		*(out++)='\n';
166*0Sstevel@tonic-gate 		*out='\0';
167*0Sstevel@tonic-gate 		total+=j+1;
168*0Sstevel@tonic-gate 		}
169*0Sstevel@tonic-gate 	if (inl != 0)
170*0Sstevel@tonic-gate 		memcpy(&(ctx->enc_data[0]),in,inl);
171*0Sstevel@tonic-gate 	ctx->num=inl;
172*0Sstevel@tonic-gate 	*outl=total;
173*0Sstevel@tonic-gate 	}
174*0Sstevel@tonic-gate 
175*0Sstevel@tonic-gate void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl)
176*0Sstevel@tonic-gate 	{
177*0Sstevel@tonic-gate 	unsigned int ret=0;
178*0Sstevel@tonic-gate 
179*0Sstevel@tonic-gate 	if (ctx->num != 0)
180*0Sstevel@tonic-gate 		{
181*0Sstevel@tonic-gate 		ret=EVP_EncodeBlock(out,ctx->enc_data,ctx->num);
182*0Sstevel@tonic-gate 		out[ret++]='\n';
183*0Sstevel@tonic-gate 		out[ret]='\0';
184*0Sstevel@tonic-gate 		ctx->num=0;
185*0Sstevel@tonic-gate 		}
186*0Sstevel@tonic-gate 	*outl=ret;
187*0Sstevel@tonic-gate 	}
188*0Sstevel@tonic-gate 
189*0Sstevel@tonic-gate int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen)
190*0Sstevel@tonic-gate 	{
191*0Sstevel@tonic-gate 	int i,ret=0;
192*0Sstevel@tonic-gate 	unsigned long l;
193*0Sstevel@tonic-gate 
194*0Sstevel@tonic-gate 	for (i=dlen; i > 0; i-=3)
195*0Sstevel@tonic-gate 		{
196*0Sstevel@tonic-gate 		if (i >= 3)
197*0Sstevel@tonic-gate 			{
198*0Sstevel@tonic-gate 			l=	(((unsigned long)f[0])<<16L)|
199*0Sstevel@tonic-gate 				(((unsigned long)f[1])<< 8L)|f[2];
200*0Sstevel@tonic-gate 			*(t++)=conv_bin2ascii(l>>18L);
201*0Sstevel@tonic-gate 			*(t++)=conv_bin2ascii(l>>12L);
202*0Sstevel@tonic-gate 			*(t++)=conv_bin2ascii(l>> 6L);
203*0Sstevel@tonic-gate 			*(t++)=conv_bin2ascii(l     );
204*0Sstevel@tonic-gate 			}
205*0Sstevel@tonic-gate 		else
206*0Sstevel@tonic-gate 			{
207*0Sstevel@tonic-gate 			l=((unsigned long)f[0])<<16L;
208*0Sstevel@tonic-gate 			if (i == 2) l|=((unsigned long)f[1]<<8L);
209*0Sstevel@tonic-gate 
210*0Sstevel@tonic-gate 			*(t++)=conv_bin2ascii(l>>18L);
211*0Sstevel@tonic-gate 			*(t++)=conv_bin2ascii(l>>12L);
212*0Sstevel@tonic-gate 			*(t++)=(i == 1)?'=':conv_bin2ascii(l>> 6L);
213*0Sstevel@tonic-gate 			*(t++)='=';
214*0Sstevel@tonic-gate 			}
215*0Sstevel@tonic-gate 		ret+=4;
216*0Sstevel@tonic-gate 		f+=3;
217*0Sstevel@tonic-gate 		}
218*0Sstevel@tonic-gate 
219*0Sstevel@tonic-gate 	*t='\0';
220*0Sstevel@tonic-gate 	return(ret);
221*0Sstevel@tonic-gate 	}
222*0Sstevel@tonic-gate 
223*0Sstevel@tonic-gate void EVP_DecodeInit(EVP_ENCODE_CTX *ctx)
224*0Sstevel@tonic-gate 	{
225*0Sstevel@tonic-gate 	ctx->length=30;
226*0Sstevel@tonic-gate 	ctx->num=0;
227*0Sstevel@tonic-gate 	ctx->line_num=0;
228*0Sstevel@tonic-gate 	ctx->expect_nl=0;
229*0Sstevel@tonic-gate 	}
230*0Sstevel@tonic-gate 
231*0Sstevel@tonic-gate /* -1 for error
232*0Sstevel@tonic-gate  *  0 for last line
233*0Sstevel@tonic-gate  *  1 for full line
234*0Sstevel@tonic-gate  */
235*0Sstevel@tonic-gate int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
236*0Sstevel@tonic-gate 	     unsigned char *in, int inl)
237*0Sstevel@tonic-gate 	{
238*0Sstevel@tonic-gate 	int seof= -1,eof=0,rv= -1,ret=0,i,v,tmp,n,ln,tmp2,exp_nl;
239*0Sstevel@tonic-gate 	unsigned char *d;
240*0Sstevel@tonic-gate 
241*0Sstevel@tonic-gate 	n=ctx->num;
242*0Sstevel@tonic-gate 	d=ctx->enc_data;
243*0Sstevel@tonic-gate 	ln=ctx->line_num;
244*0Sstevel@tonic-gate 	exp_nl=ctx->expect_nl;
245*0Sstevel@tonic-gate 
246*0Sstevel@tonic-gate 	/* last line of input. */
247*0Sstevel@tonic-gate 	if ((inl == 0) || ((n == 0) && (conv_ascii2bin(in[0]) == B64_EOF)))
248*0Sstevel@tonic-gate 		{ rv=0; goto end; }
249*0Sstevel@tonic-gate 
250*0Sstevel@tonic-gate 	/* We parse the input data */
251*0Sstevel@tonic-gate 	for (i=0; i<inl; i++)
252*0Sstevel@tonic-gate 		{
253*0Sstevel@tonic-gate 		/* If the current line is > 80 characters, scream alot */
254*0Sstevel@tonic-gate 		if (ln >= 80) { rv= -1; goto end; }
255*0Sstevel@tonic-gate 
256*0Sstevel@tonic-gate 		/* Get char and put it into the buffer */
257*0Sstevel@tonic-gate 		tmp= *(in++);
258*0Sstevel@tonic-gate 		v=conv_ascii2bin(tmp);
259*0Sstevel@tonic-gate 		/* only save the good data :-) */
260*0Sstevel@tonic-gate 		if (!B64_NOT_BASE64(v))
261*0Sstevel@tonic-gate 			{
262*0Sstevel@tonic-gate 			OPENSSL_assert(n < sizeof ctx->enc_data);
263*0Sstevel@tonic-gate 			d[n++]=tmp;
264*0Sstevel@tonic-gate 			ln++;
265*0Sstevel@tonic-gate 			}
266*0Sstevel@tonic-gate 		else if (v == B64_ERROR)
267*0Sstevel@tonic-gate 			{
268*0Sstevel@tonic-gate 			rv= -1;
269*0Sstevel@tonic-gate 			goto end;
270*0Sstevel@tonic-gate 			}
271*0Sstevel@tonic-gate 
272*0Sstevel@tonic-gate 		/* have we seen a '=' which is 'definitly' the last
273*0Sstevel@tonic-gate 		 * input line.  seof will point to the character that
274*0Sstevel@tonic-gate 		 * holds it. and eof will hold how many characters to
275*0Sstevel@tonic-gate 		 * chop off. */
276*0Sstevel@tonic-gate 		if (tmp == '=')
277*0Sstevel@tonic-gate 			{
278*0Sstevel@tonic-gate 			if (seof == -1) seof=n;
279*0Sstevel@tonic-gate 			eof++;
280*0Sstevel@tonic-gate 			}
281*0Sstevel@tonic-gate 
282*0Sstevel@tonic-gate 		if (v == B64_CR)
283*0Sstevel@tonic-gate 			{
284*0Sstevel@tonic-gate 			ln = 0;
285*0Sstevel@tonic-gate 			if (exp_nl)
286*0Sstevel@tonic-gate 				continue;
287*0Sstevel@tonic-gate 			}
288*0Sstevel@tonic-gate 
289*0Sstevel@tonic-gate 		/* eoln */
290*0Sstevel@tonic-gate 		if (v == B64_EOLN)
291*0Sstevel@tonic-gate 			{
292*0Sstevel@tonic-gate 			ln=0;
293*0Sstevel@tonic-gate 			if (exp_nl)
294*0Sstevel@tonic-gate 				{
295*0Sstevel@tonic-gate 				exp_nl=0;
296*0Sstevel@tonic-gate 				continue;
297*0Sstevel@tonic-gate 				}
298*0Sstevel@tonic-gate 			}
299*0Sstevel@tonic-gate 		exp_nl=0;
300*0Sstevel@tonic-gate 
301*0Sstevel@tonic-gate 		/* If we are at the end of input and it looks like a
302*0Sstevel@tonic-gate 		 * line, process it. */
303*0Sstevel@tonic-gate 		if (((i+1) == inl) && (((n&3) == 0) || eof))
304*0Sstevel@tonic-gate 			{
305*0Sstevel@tonic-gate 			v=B64_EOF;
306*0Sstevel@tonic-gate 			/* In case things were given us in really small
307*0Sstevel@tonic-gate 			   records (so two '=' were given in separate
308*0Sstevel@tonic-gate 			   updates), eof may contain the incorrect number
309*0Sstevel@tonic-gate 			   of ending bytes to skip, so let's redo the count */
310*0Sstevel@tonic-gate 			eof = 0;
311*0Sstevel@tonic-gate 			if (d[n-1] == '=') eof++;
312*0Sstevel@tonic-gate 			if (d[n-2] == '=') eof++;
313*0Sstevel@tonic-gate 			/* There will never be more than two '=' */
314*0Sstevel@tonic-gate 			}
315*0Sstevel@tonic-gate 
316*0Sstevel@tonic-gate 		if ((v == B64_EOF) || (n >= 64))
317*0Sstevel@tonic-gate 			{
318*0Sstevel@tonic-gate 			/* This is needed to work correctly on 64 byte input
319*0Sstevel@tonic-gate 			 * lines.  We process the line and then need to
320*0Sstevel@tonic-gate 			 * accept the '\n' */
321*0Sstevel@tonic-gate 			if ((v != B64_EOF) && (n >= 64)) exp_nl=1;
322*0Sstevel@tonic-gate 			tmp2=v;
323*0Sstevel@tonic-gate 			if (n > 0)
324*0Sstevel@tonic-gate 				{
325*0Sstevel@tonic-gate 				v=EVP_DecodeBlock(out,d,n);
326*0Sstevel@tonic-gate 				if (v < 0) { rv=0; goto end; }
327*0Sstevel@tonic-gate 				n=0;
328*0Sstevel@tonic-gate 				ret+=(v-eof);
329*0Sstevel@tonic-gate 				}
330*0Sstevel@tonic-gate 			else
331*0Sstevel@tonic-gate 				{
332*0Sstevel@tonic-gate 				eof=1;
333*0Sstevel@tonic-gate 				v=0;
334*0Sstevel@tonic-gate 				}
335*0Sstevel@tonic-gate 
336*0Sstevel@tonic-gate 			/* This is the case where we have had a short
337*0Sstevel@tonic-gate 			 * but valid input line */
338*0Sstevel@tonic-gate 			if ((v < ctx->length) && eof)
339*0Sstevel@tonic-gate 				{
340*0Sstevel@tonic-gate 				rv=0;
341*0Sstevel@tonic-gate 				goto end;
342*0Sstevel@tonic-gate 				}
343*0Sstevel@tonic-gate 			else
344*0Sstevel@tonic-gate 				ctx->length=v;
345*0Sstevel@tonic-gate 
346*0Sstevel@tonic-gate 			if (seof >= 0) { rv=0; goto end; }
347*0Sstevel@tonic-gate 			out+=v;
348*0Sstevel@tonic-gate 			}
349*0Sstevel@tonic-gate 		}
350*0Sstevel@tonic-gate 	rv=1;
351*0Sstevel@tonic-gate end:
352*0Sstevel@tonic-gate 	*outl=ret;
353*0Sstevel@tonic-gate 	ctx->num=n;
354*0Sstevel@tonic-gate 	ctx->line_num=ln;
355*0Sstevel@tonic-gate 	ctx->expect_nl=exp_nl;
356*0Sstevel@tonic-gate 	return(rv);
357*0Sstevel@tonic-gate 	}
358*0Sstevel@tonic-gate 
359*0Sstevel@tonic-gate int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n)
360*0Sstevel@tonic-gate 	{
361*0Sstevel@tonic-gate 	int i,ret=0,a,b,c,d;
362*0Sstevel@tonic-gate 	unsigned long l;
363*0Sstevel@tonic-gate 
364*0Sstevel@tonic-gate 	/* trim white space from the start of the line. */
365*0Sstevel@tonic-gate 	while ((conv_ascii2bin(*f) == B64_WS) && (n > 0))
366*0Sstevel@tonic-gate 		{
367*0Sstevel@tonic-gate 		f++;
368*0Sstevel@tonic-gate 		n--;
369*0Sstevel@tonic-gate 		}
370*0Sstevel@tonic-gate 
371*0Sstevel@tonic-gate 	/* strip off stuff at the end of the line
372*0Sstevel@tonic-gate 	 * ascii2bin values B64_WS, B64_EOLN, B64_EOLN and B64_EOF */
373*0Sstevel@tonic-gate 	while ((n > 3) && (B64_NOT_BASE64(conv_ascii2bin(f[n-1]))))
374*0Sstevel@tonic-gate 		n--;
375*0Sstevel@tonic-gate 
376*0Sstevel@tonic-gate 	if (n%4 != 0) return(-1);
377*0Sstevel@tonic-gate 
378*0Sstevel@tonic-gate 	for (i=0; i<n; i+=4)
379*0Sstevel@tonic-gate 		{
380*0Sstevel@tonic-gate 		a=conv_ascii2bin(*(f++));
381*0Sstevel@tonic-gate 		b=conv_ascii2bin(*(f++));
382*0Sstevel@tonic-gate 		c=conv_ascii2bin(*(f++));
383*0Sstevel@tonic-gate 		d=conv_ascii2bin(*(f++));
384*0Sstevel@tonic-gate 		if (	(a & 0x80) || (b & 0x80) ||
385*0Sstevel@tonic-gate 			(c & 0x80) || (d & 0x80))
386*0Sstevel@tonic-gate 			return(-1);
387*0Sstevel@tonic-gate 		l=(	(((unsigned long)a)<<18L)|
388*0Sstevel@tonic-gate 			(((unsigned long)b)<<12L)|
389*0Sstevel@tonic-gate 			(((unsigned long)c)<< 6L)|
390*0Sstevel@tonic-gate 			(((unsigned long)d)     ));
391*0Sstevel@tonic-gate 		*(t++)=(unsigned char)(l>>16L)&0xff;
392*0Sstevel@tonic-gate 		*(t++)=(unsigned char)(l>> 8L)&0xff;
393*0Sstevel@tonic-gate 		*(t++)=(unsigned char)(l     )&0xff;
394*0Sstevel@tonic-gate 		ret+=3;
395*0Sstevel@tonic-gate 		}
396*0Sstevel@tonic-gate 	return(ret);
397*0Sstevel@tonic-gate 	}
398*0Sstevel@tonic-gate 
399*0Sstevel@tonic-gate int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl)
400*0Sstevel@tonic-gate 	{
401*0Sstevel@tonic-gate 	int i;
402*0Sstevel@tonic-gate 
403*0Sstevel@tonic-gate 	*outl=0;
404*0Sstevel@tonic-gate 	if (ctx->num != 0)
405*0Sstevel@tonic-gate 		{
406*0Sstevel@tonic-gate 		i=EVP_DecodeBlock(out,ctx->enc_data,ctx->num);
407*0Sstevel@tonic-gate 		if (i < 0) return(-1);
408*0Sstevel@tonic-gate 		ctx->num=0;
409*0Sstevel@tonic-gate 		*outl=i;
410*0Sstevel@tonic-gate 		return(1);
411*0Sstevel@tonic-gate 		}
412*0Sstevel@tonic-gate 	else
413*0Sstevel@tonic-gate 		return(1);
414*0Sstevel@tonic-gate 	}
415*0Sstevel@tonic-gate 
416*0Sstevel@tonic-gate #ifdef undef
417*0Sstevel@tonic-gate int EVP_DecodeValid(unsigned char *buf, int len)
418*0Sstevel@tonic-gate 	{
419*0Sstevel@tonic-gate 	int i,num=0,bad=0;
420*0Sstevel@tonic-gate 
421*0Sstevel@tonic-gate 	if (len == 0) return(-1);
422*0Sstevel@tonic-gate 	while (conv_ascii2bin(*buf) == B64_WS)
423*0Sstevel@tonic-gate 		{
424*0Sstevel@tonic-gate 		buf++;
425*0Sstevel@tonic-gate 		len--;
426*0Sstevel@tonic-gate 		if (len == 0) return(-1);
427*0Sstevel@tonic-gate 		}
428*0Sstevel@tonic-gate 
429*0Sstevel@tonic-gate 	for (i=len; i >= 4; i-=4)
430*0Sstevel@tonic-gate 		{
431*0Sstevel@tonic-gate 		if (	(conv_ascii2bin(buf[0]) >= 0x40) ||
432*0Sstevel@tonic-gate 			(conv_ascii2bin(buf[1]) >= 0x40) ||
433*0Sstevel@tonic-gate 			(conv_ascii2bin(buf[2]) >= 0x40) ||
434*0Sstevel@tonic-gate 			(conv_ascii2bin(buf[3]) >= 0x40))
435*0Sstevel@tonic-gate 			return(-1);
436*0Sstevel@tonic-gate 		buf+=4;
437*0Sstevel@tonic-gate 		num+=1+(buf[2] != '=')+(buf[3] != '=');
438*0Sstevel@tonic-gate 		}
439*0Sstevel@tonic-gate 	if ((i == 1) && (conv_ascii2bin(buf[0]) == B64_EOLN))
440*0Sstevel@tonic-gate 		return(num);
441*0Sstevel@tonic-gate 	if ((i == 2) && (conv_ascii2bin(buf[0]) == B64_EOLN) &&
442*0Sstevel@tonic-gate 		(conv_ascii2bin(buf[0]) == B64_EOLN))
443*0Sstevel@tonic-gate 		return(num);
444*0Sstevel@tonic-gate 	return(1);
445*0Sstevel@tonic-gate 	}
446*0Sstevel@tonic-gate #endif
447