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Spdk/lib/util/base64.c
paul luse a6dbe3721e update Intel copyright notices 
per Intel policy to include file commit date using git cmd
below.  The policy does not apply to non-Intel (C) notices.

git log --follow -C90% --format=%ad --date default <file> | tail -1

and then pull just the 4 digit year from the result.

Intel copyrights were not added to files where Intel either had
no contribution ot the contribution lacked substance (ie license
header updates, formatting changes, etc).  Contribution date used
"--follow -C95%" to get the most accurate date.

Note that several files in this patch didn't end the license/(c)
block with a blank comment line so these were added as the vast
majority of files do have this last blank line.  Simply there for
consistency.

Signed-off-by: paul luse <paul.e.luse@intel.com>
Change-Id: Id5b7ce4f658fe87132f14139ead58d6e285c04d4
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15192
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Community-CI: Mellanox Build Bot
2022-11-10 08:28:53 +00:00

251 lines
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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (C) 2018 Intel Corporation. All rights reserved.
* Copyright(c) ARM Limited. 2021 All rights reserved.
* All rights reserved.
*/
#include "spdk/stdinc.h"
#include "spdk/endian.h"
#include "spdk/base64.h"
#ifdef __aarch64__
#ifdef __ARM_FEATURE_SVE
#include "base64_sve.c"
#else
#include "base64_neon.c"
#endif
#endif
#define BASE64_ENC_BITMASK 0x3FUL
#define BASE64_PADDING_CHAR '='
static const char base64_enc_table[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";
static const char base64_urlsafe_enc_table[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789-_";
static const uint8_t
base64_dec_table[] = {
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255,
255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
};
static const uint8_t
base64_urlsafe_dec_table[] = {
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255,
255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 63,
255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
};
static int
base64_encode(char *dst, const char *enc_table, const void *src, size_t src_len)
{
uint32_t raw_u32;
if (!dst || !src || src_len <= 0) {
return -EINVAL;
}
#ifdef __aarch64__
#ifdef __ARM_FEATURE_SVE
base64_encode_sve(&dst, enc_table, &src, &src_len);
#else
base64_encode_neon64(&dst, enc_table, &src, &src_len);
#endif
#endif
while (src_len >= 4) {
raw_u32 = from_be32(src);
*dst++ = enc_table[(raw_u32 >> 26) & BASE64_ENC_BITMASK];
*dst++ = enc_table[(raw_u32 >> 20) & BASE64_ENC_BITMASK];
*dst++ = enc_table[(raw_u32 >> 14) & BASE64_ENC_BITMASK];
*dst++ = enc_table[(raw_u32 >> 8) & BASE64_ENC_BITMASK];
src_len -= 3;
src += 3;
}
if (src_len == 0) {
goto out;
}
raw_u32 = 0;
memcpy(&raw_u32, src, src_len);
raw_u32 = from_be32(&raw_u32);
*dst++ = enc_table[(raw_u32 >> 26) & BASE64_ENC_BITMASK];
*dst++ = enc_table[(raw_u32 >> 20) & BASE64_ENC_BITMASK];
*dst++ = (src_len >= 2) ? enc_table[(raw_u32 >> 14) & BASE64_ENC_BITMASK] : BASE64_PADDING_CHAR;
*dst++ = (src_len == 3) ? enc_table[(raw_u32 >> 8) & BASE64_ENC_BITMASK] : BASE64_PADDING_CHAR;
out:
*dst = '\0';
return 0;
}
int
spdk_base64_encode(char *dst, const void *src, size_t src_len)
{
return base64_encode(dst, base64_enc_table, src, src_len);
}
int
spdk_base64_urlsafe_encode(char *dst, const void *src, size_t src_len)
{
return base64_encode(dst, base64_urlsafe_enc_table, src, src_len);
}
#if defined(__aarch64__) && !defined(__ARM_FEATURE_SVE)
static int
base64_decode(void *dst, size_t *_dst_len, const uint8_t *dec_table,
const uint8_t *dec_table_opt, const char *src)
#else
static int
base64_decode(void *dst, size_t *_dst_len, const uint8_t *dec_table, const char *src)
#endif
{
size_t src_strlen;
size_t tail_len = 0;
const uint8_t *src_in;
uint32_t tmp[4];
int i;
if (!src) {
return -EINVAL;
}
src_strlen = strlen(src);
/* strlen of src should be 4n */
if (src_strlen == 0 || src_strlen % 4 != 0) {
return -EINVAL;
}
/* Consider Base64 padding, it at most has 2 padding characters. */
for (i = 0; i < 2; i++) {
if (src[src_strlen - 1] != BASE64_PADDING_CHAR) {
break;
}
src_strlen--;
}
/* strlen of src without padding shouldn't be 4n+1 */
if (src_strlen == 0 || src_strlen % 4 == 1) {
return -EINVAL;
}
if (_dst_len) {
*_dst_len = spdk_base64_get_decoded_len(src_strlen);
}
/* If dst is NULL, the client is only concerned w/ _dst_len, return */
if (!dst) {
return 0;
}
src_in = (const uint8_t *) src;
#ifdef __aarch64__
#ifdef __ARM_FEATURE_SVE
base64_decode_sve(&dst, dec_table, &src_in, &src_strlen);
#else
base64_decode_neon64(&dst, dec_table_opt, &src_in, &src_strlen);
#endif
if (src_strlen == 0) {
return 0;
}
#endif
/* space of dst can be used by to_be32 */
while (src_strlen > 4) {
tmp[0] = dec_table[*src_in++];
tmp[1] = dec_table[*src_in++];
tmp[2] = dec_table[*src_in++];
tmp[3] = dec_table[*src_in++];
if (tmp[0] == 255 || tmp[1] == 255 || tmp[2] == 255 || tmp[3] == 255) {
return -EINVAL;
}
to_be32(dst, tmp[3] << 8 | tmp[2] << 14 | tmp[1] << 20 | tmp[0] << 26);
dst += 3;
src_strlen -= 4;
}
/* space of dst is not enough to be used by to_be32 */
tmp[0] = dec_table[src_in[0]];
tmp[1] = dec_table[src_in[1]];
tmp[2] = (src_strlen >= 3) ? dec_table[src_in[2]] : 0;
tmp[3] = (src_strlen == 4) ? dec_table[src_in[3]] : 0;
tail_len = src_strlen - 1;
if (tmp[0] == 255 || tmp[1] == 255 || tmp[2] == 255 || tmp[3] == 255) {
return -EINVAL;
}
to_be32(&tmp[3], tmp[3] << 8 | tmp[2] << 14 | tmp[1] << 20 | tmp[0] << 26);
memcpy(dst, (uint8_t *)&tmp[3], tail_len);
return 0;
}
int
spdk_base64_decode(void *dst, size_t *dst_len, const char *src)
{
#if defined(__aarch64__) && !defined(__ARM_FEATURE_SVE)
return base64_decode(dst, dst_len, base64_dec_table, base64_dec_table_neon64, src);
#else
return base64_decode(dst, dst_len, base64_dec_table, src);
#endif
}
int
spdk_base64_urlsafe_decode(void *dst, size_t *dst_len, const char *src)
{
#if defined(__aarch64__) && !defined(__ARM_FEATURE_SVE)
return base64_decode(dst, dst_len, base64_urlsafe_dec_table, base64_urlsafe_dec_table_neon64,
src);
#else
return base64_decode(dst, dst_len, base64_urlsafe_dec_table, src);
#endif
}
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