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/*
Authors:
Jan Cholasta <jcholast@redhat.com>
George McCollister <george.mccollister@gmail.com>
Copyright (C) 2012 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "util/util.h"
#include <openssl/bio.h>
#include <openssl/evp.h>
char *sss_base64_encode(TALLOC_CTX *mem_ctx,
const unsigned char *in,
size_t insize)
{
char *b64encoded = NULL, *outbuf = NULL;
int i, j, b64size;
BIO *bmem, *b64;
b64 = BIO_new(BIO_f_base64());
if (!b64) return NULL;
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
bmem = BIO_new(BIO_s_mem());
if (!bmem) goto done;
b64 = BIO_push(b64, bmem);
BIO_write(b64, in, insize);
(void) BIO_flush(b64);
b64size = BIO_get_mem_data(bmem, &b64encoded);
if (b64encoded) {
outbuf = talloc_array(mem_ctx, char, b64size+1);
if (outbuf == NULL) goto done;
for (i=0, j=0; i < b64size; i++) {
if (b64encoded[i] == '\n' || b64encoded[i] == '\r') {
continue;
}
outbuf[j++] = b64encoded[i];
}
outbuf[j++] = '\0';
}
done:
BIO_free_all(b64);
return outbuf;
}
unsigned char *sss_base64_decode(TALLOC_CTX *mem_ctx,
const char *in,
size_t *outsize)
{
unsigned char *outbuf = NULL;
unsigned char *b64decoded = NULL;
unsigned char inbuf[512];
char * in_dup;
int size, inlen = strlen(in);
BIO *bmem, *b64, *bmem_out;
TALLOC_CTX *tmp_ctx = NULL;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) {
return NULL;
}
in_dup = talloc_size(tmp_ctx, inlen+1);
if (!in_dup) goto done;
memcpy(in_dup, in, inlen+1);
b64 = BIO_new(BIO_f_base64());
if (!b64) goto done;
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
bmem = BIO_new_mem_buf(in_dup, -1);
if (!bmem) {
BIO_free(b64);
goto done;
}
b64 = BIO_push(b64, bmem);
bmem_out = BIO_new(BIO_s_mem());
if (!bmem_out) {
BIO_free_all(b64);
goto done;
}
while((inlen = BIO_read(b64, inbuf, 512)) > 0)
BIO_write(bmem_out, inbuf, inlen);
(void) BIO_flush(bmem_out);
size = BIO_get_mem_data(bmem_out, &b64decoded);
if (b64decoded) {
outbuf = talloc_memdup(mem_ctx, b64decoded, size);
if (!outbuf) {
BIO_free_all(b64);
BIO_free(bmem_out);
goto done;
}
*outsize = size;
} else {
DEBUG(SSSDBG_CRIT_FAILURE, ("Cannot get decoded data\n"));
}
BIO_free_all(b64);
BIO_free(bmem_out);
done:
talloc_free(tmp_ctx);
return outbuf;
}
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