OpenSolaris_b135/lib/libkmf/libkmf/common/pem_encode.c
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* 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.]
*/
/* pem_encode.c - PEM encoding routines */
#include <stdlib.h>
#include <strings.h>
#include <sys/types.h>
#include <kmfapi.h>
#include <pem_encode.h>
static unsigned char data_bin2ascii[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ\
abcdefghijklmnopqrstuvwxyz0123456789+/";
static unsigned char data_ascii2bin[128] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xE0, 0xF0, 0xFF, 0xFF, 0xF1, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xE0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0x3E, 0xFF, 0xF2, 0xFF, 0x3F,
0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
0x3C, 0x3D, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF,
0xFF, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
0x17, 0x18, 0x19, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
0x31, 0x32, 0x33, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
};
#define conv_bin2ascii(a) (data_bin2ascii[(a)&0x3f])
#define conv_ascii2bin(a) (data_ascii2bin[(a)&0x7f])
void
PEM_EncodeInit(PEM_ENCODE_CTX *ctx)
{
ctx->length = 48;
ctx->num = 0;
ctx->line_num = 0;
}
int
PEM_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen)
{
int i, ret = 0;
unsigned long l;
for (i = dlen; i > 0; i -= 3) {
if (i >= 3) {
l = (((unsigned long)f[0])<<16L)|
(((unsigned long)f[1])<< 8L)|f[2];
*(t++) = conv_bin2ascii(l>>18L);
*(t++) = conv_bin2ascii(l>>12L);
*(t++) = conv_bin2ascii(l>> 6L);
*(t++) = conv_bin2ascii(l);
} else {
l = ((unsigned long)f[0])<<16L;
if (i == 2)
l |= ((unsigned long)f[1]<<8L);
*(t++) = conv_bin2ascii(l>>18L);
*(t++) = conv_bin2ascii(l>>12L);
*(t++) = (i == 1)?'=':conv_bin2ascii(l>> 6L);
*(t++) = '=';
}
ret += 4;
f += 3;
}
*t = '\0';
return (ret);
}
void
PEM_EncodeUpdate(PEM_ENCODE_CTX *ctx, unsigned char *out, int *outl,
unsigned char *in, int inl)
{
int i, j;
unsigned int total = 0;
*outl = 0;
if (inl == 0)
return;
if ((ctx->num+inl) < ctx->length) {
(void) memcpy(&(ctx->enc_data[ctx->num]), in, inl);
ctx->num += inl;
return;
}
if (ctx->num != 0) {
i = ctx->length-ctx->num;
(void) memcpy(&(ctx->enc_data[ctx->num]), in, i);
in += i;
inl -= i;
j = PEM_EncodeBlock(out, ctx->enc_data, ctx->length);
ctx->num = 0;
out += j;
*(out++) = '\n';
*out = '\0';
total = j+1;
}
while (inl >= ctx->length) {
j = PEM_EncodeBlock(out, in, ctx->length);
in += ctx->length;
inl -= ctx->length;
out += j;
*(out++) = '\n';
*out = '\0';
total += j+1;
}
if (inl != 0)
(void) memcpy(&(ctx->enc_data[0]), in, inl);
ctx->num = inl;
*outl = total;
}
void
PEM_EncodeFinal(PEM_ENCODE_CTX *ctx, unsigned char *out, int *outl)
{
unsigned int ret = 0;
if (ctx->num != 0) {
ret = PEM_EncodeBlock(out, ctx->enc_data, ctx->num);
out[ret++] = '\n';
out[ret] = '\0';
ctx->num = 0;
}
*outl = ret;
}
KMF_RETURN
Der2Pem(KMF_OBJECT_TYPE type, unsigned char *data,
int len, unsigned char **out, int *outlen)
{
int nlen, n, i, j, outl;
unsigned char *buf = NULL, *p = NULL;
PEM_ENCODE_CTX ctx;
char *name = NULL;
if (data == NULL || len == 0 || out == NULL || outlen == NULL)
return (KMF_ERR_BAD_PARAMETER);
if (type == KMF_CERT)
name = PEM_STRING_X509;
else if (type == KMF_CSR)
name = PEM_STRING_X509_REQ;
else if (type == KMF_CRL)
name = PEM_STRING_X509_CRL;
else
return (KMF_ERR_BAD_OBJECT_TYPE);
PEM_EncodeInit(&ctx);
nlen = strlen(name);
buf = malloc(PEM_BUFSIZE*8);
if (buf == NULL) {
return (KMF_ERR_MEMORY);
}
p = buf;
(void) memcpy(p, "-----BEGIN ", 11);
p += 11;
(void) memcpy(p, name, nlen);
p += nlen;
(void) memcpy(p, "-----\n", 6);
p += 6;
i = j = 0;
while (len > 0) {
n = (int)((len > (PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
PEM_EncodeUpdate(&ctx, p, &outl, &(data[j]), n);
i += outl;
len -= n;
j += n;
p += outl;
}
PEM_EncodeFinal(&ctx, p, &outl);
if (outl > 0)
p += outl;
(void) memcpy(p, "-----END ", 9);
p += 9;
(void) memcpy(p, name, nlen);
p += nlen;
(void) memcpy(p, "-----\n", 6);
p += 6;
*out = buf;
*outlen = i+outl+nlen*2+11+6+9+6;
return (KMF_OK);
}
int
PEM_DecodeBlock(unsigned char *t, const unsigned char *f, int n)
{
int i, ret = 0, a, b, c, d;
unsigned long l;
/* trim white space from the start of the line. */
while ((conv_ascii2bin(*f) == B64_WS) && (n > 0)) {
f++;
n--;
}
/*
* strip off stuff at the end of the line
* ascii2bin values B64_WS, B64_EOLN, B64_EOLN and B64_EOF
*/
while ((n > 3) && (B64_NOT_BASE64(conv_ascii2bin(f[n-1]))))
n--;
if (n%4 != 0) {
return (-1);
}
for (i = 0; i < n; i += 4) {
a = conv_ascii2bin(*(f++));
b = conv_ascii2bin(*(f++));
c = conv_ascii2bin(*(f++));
d = conv_ascii2bin(*(f++));
if ((a & 0x80) || (b & 0x80) || (c & 0x80) || (d & 0x80))
return (-1);
l = ((((unsigned long)a)<<18L) | (((unsigned long)b)<<12L) |
(((unsigned long)c)<< 6L) | (((unsigned long)d)));
*(t++) = (unsigned char)(l>>16L)&0xff;
*(t++) = (unsigned char)(l>> 8L)&0xff;
*(t++) = (unsigned char)(l)&0xff;
ret += 3;
}
return (ret);
}
void
PEM_DecodeInit(PEM_ENCODE_CTX *ctx)
{
ctx->length = 30;
ctx->num = 0;
ctx->line_num = 0;
ctx->expect_nl = 0;
}
/*
* -1 for error
* 0 for last line
* 1 for full line
*/
int
PEM_DecodeUpdate(PEM_ENCODE_CTX *ctx, unsigned char *out, int *outl,
unsigned char *in, int inl)
{
int seof = -1, eof = 0, rv = -1, ret = 0;
int i, v, tmp, n, ln, exp_nl;
unsigned char *d;
n = ctx->num;
d = ctx->enc_data;
ln = ctx->line_num;
exp_nl = ctx->expect_nl;
/* last line of input. */
if ((inl == 0) || ((n == 0) && (conv_ascii2bin(in[0]) == B64_EOF))) {
rv = 0;
goto end;
}
/* We parse the input data */
for (i = 0; i < inl; i++) {
/* If the current line is > 80 characters, scream alot */
if (ln >= 80) {
rv = -1;
goto end;
}
/* Get char and put it into the buffer */
tmp = *(in++);
v = conv_ascii2bin(tmp);
/* only save the good data :-) */
if (!B64_NOT_BASE64(v)) {
d[n++] = tmp;
ln++;
} else if (v == B64_ERROR) {
rv = -1;
goto end;
}
/*
* have we seen a '=' which is 'definitly' the last
* input line. seof will point to the character that
* holds it. and eof will hold how many characters to
* chop off.
*/
if (tmp == '=') {
if (seof == -1) seof = n;
eof++;
}
if (v == B64_CR) {
ln = 0;
if (exp_nl)
continue;
}
/* eoln */
if (v == B64_EOLN) {
ln = 0;
if (exp_nl) {
exp_nl = 0;
continue;
}
}
exp_nl = 0;
/*
* If we are at the end of input and it looks like a
* line, process it.
*/
if (((i+1) == inl) && (((n&3) == 0) || eof)) {
v = B64_EOF;
/*
* In case things were given us in really small
* records (so two '=' were given in separate
* updates), eof may contain the incorrect number
* of ending bytes to skip, so let's redo the count
*/
eof = 0;
if (d[n-1] == '=') eof++;
if (d[n-2] == '=') eof++;
/* There will never be more than two '=' */
}
if ((v == B64_EOF) || (n >= 64)) {
/*
* This is needed to work correctly on 64 byte input
* lines. We process the line and then need to
* accept the '\n'
*/
if ((v != B64_EOF) && (n >= 64))
exp_nl = 1;
if (n > 0) {
v = PEM_DecodeBlock(out, d, n);
if (v < 0) {
rv = 0;
goto end;
}
n = 0;
ret += (v-eof);
} else {
eof = 1;
v = 0;
}
/*
* This is the case where we have had a short
* but valid input line
*/
if ((v < ctx->length) && eof) {
rv = 0;
goto end;
} else
ctx->length = v;
if (seof >= 0) {
rv = 0;
goto end;
}
out += v;
}
}
rv = 1;
end:
*outl = ret;
ctx->num = n;
ctx->line_num = ln;
ctx->expect_nl = exp_nl;
return (rv);
}
int
PEM_DecodeFinal(PEM_ENCODE_CTX *ctx, unsigned char *out, int *outl)
{
int i;
*outl = 0;
if (ctx->num != 0) {
i = PEM_DecodeBlock(out, ctx->enc_data, ctx->num);
if (i < 0)
return (-1);
ctx->num = 0;
*outl = i;
return (1);
} else
return (1);
}
static int
get_line(unsigned char *in, int inlen, char *buf, int buflen)
{
int i = 0;
while ((i < inlen) && (i < buflen) && (in[i] != '\n')) {
buf[i] = in[i];
i++;
}
return (i);
}
KMF_RETURN
Pem2Der(unsigned char *in, int inlen,
unsigned char **out, int *outlen)
{
int kmf_rv = 0;
PEM_ENCODE_CTX ctx;
int i, j, k, bl = 0;
char buf[2048];
char *nameB = NULL;
unsigned char *dataB = NULL;
int total = 0;
if (in == NULL || inlen == 0 || out == NULL)
return (KMF_ERR_BAD_PARAMETER);
(void) memset(buf, 0, sizeof (buf));
while (total < inlen) {
/*
* get a line (ended at '\n'), which returns
* number of bytes in the line
*/
i = get_line(in + total, inlen - total, buf, sizeof (buf));
if (i == 0) {
kmf_rv = KMF_ERR_ENCODING;
goto err;
}
j = i;
while ((j >= 0) && (buf[j] <= ' ')) j--;
buf[++j] = '\n';
buf[++j] = '\0';
total += i + 1;
if (strncmp(buf, "-----BEGIN ", 11) == 0) {
i = strlen(&(buf[11]));
if (strncmp(&(buf[11+i-6]), "-----\n", 6) != 0) {
continue;
}
if ((nameB = malloc(i+9)) == NULL) {
kmf_rv = KMF_ERR_MEMORY;
goto err;
}
(void) memcpy(nameB, &(buf[11]), i-6);
nameB[i-6] = '\0';
break;
}
}
bl = 0;
if ((dataB = malloc(2048)) == NULL) {
kmf_rv = KMF_ERR_MEMORY;
goto err;
}
dataB[0] = '\0';
while (total < inlen) {
(void) memset(buf, 0, 1024);
i = get_line(in+total, inlen - total, buf, sizeof (buf));
if (i == 0) break;
j = i;
while ((j >= 0) && (buf[j] <= ' '))
j--;
buf[++j] = '\n';
buf[++j] = '\0';
total += i + 1;
if (buf[0] == '\n') break;
if ((dataB = realloc(dataB, bl+j+9)) == NULL) {
kmf_rv = KMF_ERR_MEMORY;
goto err;
}
if (strncmp(buf, "-----END ", 9) == 0) {
break;
}
(void) memcpy(&(dataB[bl]), buf, j);
dataB[bl+j] = '\0';
bl += j;
}
if (nameB == NULL)
goto err;
i = strlen(nameB);
if ((strncmp(buf, "-----END ", 9) != 0) ||
(strncmp(nameB, &(buf[9]), i) != 0) ||
(strncmp(&(buf[9+i]), "-----", 5) != 0)) {
kmf_rv = KMF_ERR_ENCODING;
goto err;
}
PEM_DecodeInit(&ctx);
i = PEM_DecodeUpdate(&ctx,
(unsigned char *)dataB, &bl, (unsigned char *)dataB, bl);
if (i < 0) {
kmf_rv = KMF_ERR_ENCODING;
goto err;
}
i = PEM_DecodeFinal(&ctx, (unsigned char *)&(dataB[bl]), &k);
if (i < 0) {
kmf_rv = KMF_ERR_ENCODING;
goto err;
}
bl += k;
if (bl == 0) goto err;
*out = (unsigned char *)dataB;
*outlen = bl;
err:
if (nameB != NULL)
free(nameB);
if (kmf_rv != KMF_OK && dataB != NULL)
free(dataB);
return (kmf_rv);
}