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openssl/crypto/params.c
Richard Levitte c2ae891483 In OSSL_PARAM_set_BN(), make sure that the data_size field is at least 1 
This way, we guarantee that a zero is represented with one byte of data
that's set to zero.

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20013)
2023-01-11 23:38:13 +01:00

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/*
* Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <openssl/params.h>
#include <openssl/err.h>
#include "internal/thread_once.h"
#include "internal/numbers.h"
#include "internal/endian.h"
/* Shortcuts for raising errors that are widely used */
#define err_unsigned_negative \
ERR_raise(ERR_LIB_CRYPTO, \
CRYPTO_R_PARAM_UNSIGNED_INTEGER_NEGATIVE_VALUE_UNSUPPORTED)
#define err_out_of_range \
ERR_raise(ERR_LIB_CRYPTO, \
CRYPTO_R_PARAM_VALUE_TOO_LARGE_FOR_DESTINATION)
#define err_inexact \
ERR_raise(ERR_LIB_CRYPTO, \
CRYPTO_R_PARAM_CANNOT_BE_REPRESENTED_EXACTLY)
#define err_not_integer \
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_PARAM_NOT_INTEGER_TYPE)
#define err_too_small \
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER)
#define err_bad_type \
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_PARAM_OF_INCOMPATIBLE_TYPE)
#define err_null_argument \
ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER)
#define err_unsupported_real \
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_PARAM_UNSUPPORTED_FLOATING_POINT_FORMAT)
/*
* Return the number of bits in the mantissa of a double. This is used to
* shift a larger integral value to determine if it will exactly fit into a
* double.
*/
static unsigned int real_shift(void)
{
return sizeof(double) == 4 ? 24 : 53;
}
OSSL_PARAM *OSSL_PARAM_locate(OSSL_PARAM *p, const char *key)
{
if (p != NULL && key != NULL)
for (; p->key != NULL; p++)
if (strcmp(key, p->key) == 0)
return p;
return NULL;
}
const OSSL_PARAM *OSSL_PARAM_locate_const(const OSSL_PARAM *p, const char *key)
{
return OSSL_PARAM_locate((OSSL_PARAM *)p, key);
}
static OSSL_PARAM ossl_param_construct(const char *key, unsigned int data_type,
void *data, size_t data_size)
{
OSSL_PARAM res;
res.key = key;
res.data_type = data_type;
res.data = data;
res.data_size = data_size;
res.return_size = OSSL_PARAM_UNMODIFIED;
return res;
}
int OSSL_PARAM_modified(const OSSL_PARAM *p)
{
return p != NULL && p->return_size != OSSL_PARAM_UNMODIFIED;
}
void OSSL_PARAM_set_all_unmodified(OSSL_PARAM *p)
{
if (p != NULL)
while (p->key != NULL)
p++->return_size = OSSL_PARAM_UNMODIFIED;
}
/* Return non-zero if the signed number is negative */
static int is_negative(const void *number, size_t s)
{
const unsigned char *n = number;
DECLARE_IS_ENDIAN;
return 0x80 & (IS_BIG_ENDIAN ? n[0] : n[s - 1]);
}
/* Check that all the bytes specified match the expected sign byte */
static int check_sign_bytes(const unsigned char *p, size_t n, unsigned char s)
{
size_t i;
for (i = 0; i < n; i++)
if (p[i] != s)
return 0;
return 1;
}
/*
* Copy an integer to another integer.
* Handle different length integers and signed and unsigned integers.
* Both integers are in native byte ordering.
*/
static int copy_integer(unsigned char *dest, size_t dest_len,
const unsigned char *src, size_t src_len,
unsigned char pad, int signed_int)
{
size_t n;
DECLARE_IS_ENDIAN;
if (IS_BIG_ENDIAN) {
if (src_len < dest_len) {
n = dest_len - src_len;
memset(dest, pad, n);
memcpy(dest + n, src, src_len);
} else {
n = src_len - dest_len;
if (!check_sign_bytes(src, n, pad)
/*
* Shortening a signed value must retain the correct sign.
* Avoiding this kind of thing: -253 = 0xff03 -> 0x03 = 3
*/
|| (signed_int && ((pad ^ src[n]) & 0x80) != 0)) {
err_out_of_range;
return 0;
}
memcpy(dest, src + n, dest_len);
}
} else /* IS_LITTLE_ENDIAN */ {
if (src_len < dest_len) {
n = dest_len - src_len;
memset(dest + src_len, pad, n);
memcpy(dest, src, src_len);
} else {
n = src_len - dest_len;
if (!check_sign_bytes(src + dest_len, n, pad)
/*
* Shortening a signed value must retain the correct sign.
* Avoiding this kind of thing: 130 = 0x0082 -> 0x82 = -126
*/
|| (signed_int && ((pad ^ src[dest_len - 1]) & 0x80) != 0)) {
err_out_of_range;
return 0;
}
memcpy(dest, src, dest_len);
}
}
return 1;
}
/* Copy a signed number to a signed number of possibly different length */
static int signed_from_signed(void *dest, size_t dest_len,
const void *src, size_t src_len)
{
return copy_integer(dest, dest_len, src, src_len,
is_negative(src, src_len) ? 0xff : 0, 1);
}
/* Copy an unsigned number to a signed number of possibly different length */
static int signed_from_unsigned(void *dest, size_t dest_len,
const void *src, size_t src_len)
{
return copy_integer(dest, dest_len, src, src_len, 0, 1);
}
/* Copy a signed number to an unsigned number of possibly different length */
static int unsigned_from_signed(void *dest, size_t dest_len,
const void *src, size_t src_len)
{
if (is_negative(src, src_len)) {
err_unsigned_negative;
return 0;
}
return copy_integer(dest, dest_len, src, src_len, 0, 0);
}
/* Copy an unsigned number to an unsigned number of possibly different length */
static int unsigned_from_unsigned(void *dest, size_t dest_len,
const void *src, size_t src_len)
{
return copy_integer(dest, dest_len, src, src_len, 0, 0);
}
/* General purpose get integer parameter call that handles odd sizes */
static int general_get_int(const OSSL_PARAM *p, void *val, size_t val_size)
{
if (p->data_type == OSSL_PARAM_INTEGER)
return signed_from_signed(val, val_size, p->data, p->data_size);
if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER)
return signed_from_unsigned(val, val_size, p->data, p->data_size);
err_not_integer;
return 0;
}
/* General purpose set integer parameter call that handles odd sizes */
static int general_set_int(OSSL_PARAM *p, void *val, size_t val_size)
{
int r = 0;
p->return_size = val_size; /* Expected size */
if (p->data == NULL)
return 1;
if (p->data_type == OSSL_PARAM_INTEGER)
r = signed_from_signed(p->data, p->data_size, val, val_size);
else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER)
r = unsigned_from_signed(p->data, p->data_size, val, val_size);
else
err_not_integer;
p->return_size = r ? p->data_size : val_size;
return r;
}
/* General purpose get unsigned integer parameter call that handles odd sizes */
static int general_get_uint(const OSSL_PARAM *p, void *val, size_t val_size)
{
if (p->data_type == OSSL_PARAM_INTEGER)
return unsigned_from_signed(val, val_size, p->data, p->data_size);
if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER)
return unsigned_from_unsigned(val, val_size, p->data, p->data_size);
err_not_integer;
return 0;
}
/* General purpose set unsigned integer parameter call that handles odd sizes */
static int general_set_uint(OSSL_PARAM *p, void *val, size_t val_size)
{
int r = 0;
p->return_size = val_size; /* Expected size */
if (p->data == NULL)
return 1;
if (p->data_type == OSSL_PARAM_INTEGER)
r = signed_from_unsigned(p->data, p->data_size, val, val_size);
else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER)
r = unsigned_from_unsigned(p->data, p->data_size, val, val_size);
else
err_not_integer;
p->return_size = r ? p->data_size : val_size;
return r;
}
int OSSL_PARAM_get_int(const OSSL_PARAM *p, int *val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(int)) {
case sizeof(int32_t):
return OSSL_PARAM_get_int32(p, (int32_t *)val);
case sizeof(int64_t):
return OSSL_PARAM_get_int64(p, (int64_t *)val);
}
#endif
return general_get_int(p, val, sizeof(*val));
}
int OSSL_PARAM_set_int(OSSL_PARAM *p, int val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(int)) {
case sizeof(int32_t):
return OSSL_PARAM_set_int32(p, (int32_t)val);
case sizeof(int64_t):
return OSSL_PARAM_set_int64(p, (int64_t)val);
}
#endif
return general_set_int(p, &val, sizeof(val));
}
OSSL_PARAM OSSL_PARAM_construct_int(const char *key, int *buf)
{
return ossl_param_construct(key, OSSL_PARAM_INTEGER, buf, sizeof(int));
}
int OSSL_PARAM_get_uint(const OSSL_PARAM *p, unsigned int *val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(unsigned int)) {
case sizeof(uint32_t):
return OSSL_PARAM_get_uint32(p, (uint32_t *)val);
case sizeof(uint64_t):
return OSSL_PARAM_get_uint64(p, (uint64_t *)val);
}
#endif
return general_get_uint(p, val, sizeof(*val));
}
int OSSL_PARAM_set_uint(OSSL_PARAM *p, unsigned int val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(unsigned int)) {
case sizeof(uint32_t):
return OSSL_PARAM_set_uint32(p, (uint32_t)val);
case sizeof(uint64_t):
return OSSL_PARAM_set_uint64(p, (uint64_t)val);
}
#endif
return general_set_uint(p, &val, sizeof(val));
}
OSSL_PARAM OSSL_PARAM_construct_uint(const char *key, unsigned int *buf)
{
return ossl_param_construct(key, OSSL_PARAM_UNSIGNED_INTEGER, buf,
sizeof(unsigned int));
}
int OSSL_PARAM_get_long(const OSSL_PARAM *p, long int *val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(long int)) {
case sizeof(int32_t):
return OSSL_PARAM_get_int32(p, (int32_t *)val);
case sizeof(int64_t):
return OSSL_PARAM_get_int64(p, (int64_t *)val);
}
#endif
return general_get_int(p, val, sizeof(*val));
}
int OSSL_PARAM_set_long(OSSL_PARAM *p, long int val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(long int)) {
case sizeof(int32_t):
return OSSL_PARAM_set_int32(p, (int32_t)val);
case sizeof(int64_t):
return OSSL_PARAM_set_int64(p, (int64_t)val);
}
#endif
return general_set_int(p, &val, sizeof(val));
}
OSSL_PARAM OSSL_PARAM_construct_long(const char *key, long int *buf)
{
return ossl_param_construct(key, OSSL_PARAM_INTEGER, buf, sizeof(long int));
}
int OSSL_PARAM_get_ulong(const OSSL_PARAM *p, unsigned long int *val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(unsigned long int)) {
case sizeof(uint32_t):
return OSSL_PARAM_get_uint32(p, (uint32_t *)val);
case sizeof(uint64_t):
return OSSL_PARAM_get_uint64(p, (uint64_t *)val);
}
#endif
return general_get_uint(p, val, sizeof(*val));
}
int OSSL_PARAM_set_ulong(OSSL_PARAM *p, unsigned long int val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(unsigned long int)) {
case sizeof(uint32_t):
return OSSL_PARAM_set_uint32(p, (uint32_t)val);
case sizeof(uint64_t):
return OSSL_PARAM_set_uint64(p, (uint64_t)val);
}
#endif
return general_set_uint(p, &val, sizeof(val));
}
OSSL_PARAM OSSL_PARAM_construct_ulong(const char *key, unsigned long int *buf)
{
return ossl_param_construct(key, OSSL_PARAM_UNSIGNED_INTEGER, buf,
sizeof(unsigned long int));
}
int OSSL_PARAM_get_int32(const OSSL_PARAM *p, int32_t *val)
{
double d;
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
int64_t i64;
switch (p->data_size) {
case sizeof(int32_t):
*val = *(const int32_t *)p->data;
return 1;
case sizeof(int64_t):
i64 = *(const int64_t *)p->data;
if (i64 >= INT32_MIN && i64 <= INT32_MAX) {
*val = (int32_t)i64;
return 1;
}
err_out_of_range;
return 0;
}
#endif
return general_get_int(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
uint32_t u32;
uint64_t u64;
switch (p->data_size) {
case sizeof(uint32_t):
u32 = *(const uint32_t *)p->data;
if (u32 <= INT32_MAX) {
*val = (int32_t)u32;
return 1;
}
err_out_of_range;
return 0;
case sizeof(uint64_t):
u64 = *(const uint64_t *)p->data;
if (u64 <= INT32_MAX) {
*val = (int32_t)u64;
return 1;
}
err_out_of_range;
return 0;
}
#endif
return general_get_int(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_REAL) {
switch (p->data_size) {
case sizeof(double):
d = *(const double *)p->data;
if (d >= INT32_MIN && d <= INT32_MAX && d == (int32_t)d) {
*val = (int32_t)d;
return 1;
}
err_out_of_range;
return 0;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
int OSSL_PARAM_set_int32(OSSL_PARAM *p, int32_t val)
{
uint32_t u32;
unsigned int shift;
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(int32_t); /* Minimum expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(int32_t):
*(int32_t *)p->data = val;
return 1;
case sizeof(int64_t):
p->return_size = sizeof(int64_t);
*(int64_t *)p->data = (int64_t)val;
return 1;
}
#endif
return general_set_int(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER && val >= 0) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(uint32_t); /* Minimum expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(uint32_t):
*(uint32_t *)p->data = (uint32_t)val;
return 1;
case sizeof(uint64_t):
p->return_size = sizeof(uint64_t);
*(uint64_t *)p->data = (uint64_t)val;
return 1;
}
#endif
return general_set_int(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_REAL) {
p->return_size = sizeof(double);
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(double):
shift = real_shift();
if (shift < 8 * sizeof(val) - 1) {
u32 = val < 0 ? -val : val;
if ((u32 >> shift) != 0) {
err_inexact;
return 0;
}
}
*(double *)p->data = (double)val;
return 1;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
OSSL_PARAM OSSL_PARAM_construct_int32(const char *key, int32_t *buf)
{
return ossl_param_construct(key, OSSL_PARAM_INTEGER, buf,
sizeof(int32_t));
}
int OSSL_PARAM_get_uint32(const OSSL_PARAM *p, uint32_t *val)
{
double d;
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
uint64_t u64;
switch (p->data_size) {
case sizeof(uint32_t):
*val = *(const uint32_t *)p->data;
return 1;
case sizeof(uint64_t):
u64 = *(const uint64_t *)p->data;
if (u64 <= UINT32_MAX) {
*val = (uint32_t)u64;
return 1;
}
err_out_of_range;
return 0;
}
#endif
return general_get_uint(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
int32_t i32;
int64_t i64;
switch (p->data_size) {
case sizeof(int32_t):
i32 = *(const int32_t *)p->data;
if (i32 >= 0) {
*val = i32;
return 1;
}
err_unsigned_negative;
return 0;
case sizeof(int64_t):
i64 = *(const int64_t *)p->data;
if (i64 >= 0 && i64 <= UINT32_MAX) {
*val = (uint32_t)i64;
return 1;
}
if (i64 < 0)
err_unsigned_negative;
else
err_out_of_range;
return 0;
}
#endif
return general_get_uint(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_REAL) {
switch (p->data_size) {
case sizeof(double):
d = *(const double *)p->data;
if (d >= 0 && d <= UINT32_MAX && d == (uint32_t)d) {
*val = (uint32_t)d;
return 1;
}
err_inexact;
return 0;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
int OSSL_PARAM_set_uint32(OSSL_PARAM *p, uint32_t val)
{
unsigned int shift;
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(uint32_t); /* Minimum expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(uint32_t):
*(uint32_t *)p->data = val;
return 1;
case sizeof(uint64_t):
p->return_size = sizeof(uint64_t);
*(uint64_t *)p->data = val;
return 1;
}
#endif
return general_set_uint(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(int32_t); /* Minimum expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(int32_t):
if (val <= INT32_MAX) {
*(int32_t *)p->data = (int32_t)val;
return 1;
}
err_out_of_range;
return 0;
case sizeof(int64_t):
p->return_size = sizeof(int64_t);
*(int64_t *)p->data = (int64_t)val;
return 1;
}
#endif
return general_set_uint(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_REAL) {
p->return_size = sizeof(double);
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(double):
shift = real_shift();
if (shift < 8 * sizeof(val) && (val >> shift) != 0) {
err_inexact;
return 0;
}
*(double *)p->data = (double)val;
return 1;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
OSSL_PARAM OSSL_PARAM_construct_uint32(const char *key, uint32_t *buf)
{
return ossl_param_construct(key, OSSL_PARAM_UNSIGNED_INTEGER, buf,
sizeof(uint32_t));
}
int OSSL_PARAM_get_int64(const OSSL_PARAM *p, int64_t *val)
{
double d;
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (p->data_size) {
case sizeof(int32_t):
*val = *(const int32_t *)p->data;
return 1;
case sizeof(int64_t):
*val = *(const int64_t *)p->data;
return 1;
}
#endif
return general_get_int(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
uint64_t u64;
switch (p->data_size) {
case sizeof(uint32_t):
*val = *(const uint32_t *)p->data;
return 1;
case sizeof(uint64_t):
u64 = *(const uint64_t *)p->data;
if (u64 <= INT64_MAX) {
*val = (int64_t)u64;
return 1;
}
err_out_of_range;
return 0;
}
#endif
return general_get_int(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_REAL) {
switch (p->data_size) {
case sizeof(double):
d = *(const double *)p->data;
if (d >= INT64_MIN
/*
* By subtracting 65535 (2^16-1) we cancel the low order
* 15 bits of INT64_MAX to avoid using imprecise floating
* point values.
*/
&& d < (double)(INT64_MAX - 65535) + 65536.0
&& d == (int64_t)d) {
*val = (int64_t)d;
return 1;
}
err_inexact;
return 0;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
int OSSL_PARAM_set_int64(OSSL_PARAM *p, int64_t val)
{
uint64_t u64;
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(int64_t); /* Expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(int32_t):
if (val >= INT32_MIN && val <= INT32_MAX) {
p->return_size = sizeof(int32_t);
*(int32_t *)p->data = (int32_t)val;
return 1;
}
err_out_of_range;
return 0;
case sizeof(int64_t):
*(int64_t *)p->data = val;
return 1;
}
#endif
return general_set_int(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER && val >= 0) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(uint64_t); /* Expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(uint32_t):
if (val <= UINT32_MAX) {
p->return_size = sizeof(uint32_t);
*(uint32_t *)p->data = (uint32_t)val;
return 1;
}
err_out_of_range;
return 0;
case sizeof(uint64_t):
*(uint64_t *)p->data = (uint64_t)val;
return 1;
}
#endif
return general_set_int(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_REAL) {
p->return_size = sizeof(double);
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(double):
u64 = val < 0 ? -val : val;
if ((u64 >> real_shift()) == 0) {
*(double *)p->data = (double)val;
return 1;
}
err_inexact;
return 0;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
OSSL_PARAM OSSL_PARAM_construct_int64(const char *key, int64_t *buf)
{
return ossl_param_construct(key, OSSL_PARAM_INTEGER, buf, sizeof(int64_t));
}
int OSSL_PARAM_get_uint64(const OSSL_PARAM *p, uint64_t *val)
{
double d;
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (p->data_size) {
case sizeof(uint32_t):
*val = *(const uint32_t *)p->data;
return 1;
case sizeof(uint64_t):
*val = *(const uint64_t *)p->data;
return 1;
}
#endif
return general_get_uint(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
int32_t i32;
int64_t i64;
switch (p->data_size) {
case sizeof(int32_t):
i32 = *(const int32_t *)p->data;
if (i32 >= 0) {
*val = (uint64_t)i32;
return 1;
}
err_unsigned_negative;
return 0;
case sizeof(int64_t):
i64 = *(const int64_t *)p->data;
if (i64 >= 0) {
*val = (uint64_t)i64;
return 1;
}
err_unsigned_negative;
return 0;
}
#endif
return general_get_uint(p, val, sizeof(*val));
} else if (p->data_type == OSSL_PARAM_REAL) {
switch (p->data_size) {
case sizeof(double):
d = *(const double *)p->data;
if (d >= 0
/*
* By subtracting 65535 (2^16-1) we cancel the low order
* 15 bits of UINT64_MAX to avoid using imprecise floating
* point values.
*/
&& d < (double)(UINT64_MAX - 65535) + 65536.0
&& d == (uint64_t)d) {
*val = (uint64_t)d;
return 1;
}
err_inexact;
return 0;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
int OSSL_PARAM_set_uint64(OSSL_PARAM *p, uint64_t val)
{
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(uint64_t); /* Expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(uint32_t):
if (val <= UINT32_MAX) {
p->return_size = sizeof(uint32_t);
*(uint32_t *)p->data = (uint32_t)val;
return 1;
}
err_out_of_range;
return 0;
case sizeof(uint64_t):
*(uint64_t *)p->data = val;
return 1;
}
#endif
return general_set_uint(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_INTEGER) {
#ifndef OPENSSL_SMALL_FOOTPRINT
p->return_size = sizeof(int64_t); /* Expected size */
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(int32_t):
if (val <= INT32_MAX) {
p->return_size = sizeof(int32_t);
*(int32_t *)p->data = (int32_t)val;
return 1;
}
err_out_of_range;
return 0;
case sizeof(int64_t):
if (val <= INT64_MAX) {
*(int64_t *)p->data = (int64_t)val;
return 1;
}
err_out_of_range;
return 0;
}
#endif
return general_set_uint(p, &val, sizeof(val));
} else if (p->data_type == OSSL_PARAM_REAL) {
p->return_size = sizeof(double);
switch (p->data_size) {
case sizeof(double):
if ((val >> real_shift()) == 0) {
*(double *)p->data = (double)val;
return 1;
}
err_inexact;
return 0;
}
err_unsupported_real;
return 0;
}
err_bad_type;
return 0;
}
OSSL_PARAM OSSL_PARAM_construct_uint64(const char *key, uint64_t *buf)
{
return ossl_param_construct(key, OSSL_PARAM_UNSIGNED_INTEGER, buf,
sizeof(uint64_t));
}
int OSSL_PARAM_get_size_t(const OSSL_PARAM *p, size_t *val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(size_t)) {
case sizeof(uint32_t):
return OSSL_PARAM_get_uint32(p, (uint32_t *)val);
case sizeof(uint64_t):
return OSSL_PARAM_get_uint64(p, (uint64_t *)val);
}
#endif
return general_get_uint(p, val, sizeof(*val));
}
int OSSL_PARAM_set_size_t(OSSL_PARAM *p, size_t val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(size_t)) {
case sizeof(uint32_t):
return OSSL_PARAM_set_uint32(p, (uint32_t)val);
case sizeof(uint64_t):
return OSSL_PARAM_set_uint64(p, (uint64_t)val);
}
#endif
return general_set_uint(p, &val, sizeof(val));
}
OSSL_PARAM OSSL_PARAM_construct_size_t(const char *key, size_t *buf)
{
return ossl_param_construct(key, OSSL_PARAM_UNSIGNED_INTEGER, buf,
sizeof(size_t));
}
int OSSL_PARAM_get_time_t(const OSSL_PARAM *p, time_t *val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(time_t)) {
case sizeof(int32_t):
return OSSL_PARAM_get_int32(p, (int32_t *)val);
case sizeof(int64_t):
return OSSL_PARAM_get_int64(p, (int64_t *)val);
}
#endif
return general_get_int(p, val, sizeof(*val));
}
int OSSL_PARAM_set_time_t(OSSL_PARAM *p, time_t val)
{
#ifndef OPENSSL_SMALL_FOOTPRINT
switch (sizeof(time_t)) {
case sizeof(int32_t):
return OSSL_PARAM_set_int32(p, (int32_t)val);
case sizeof(int64_t):
return OSSL_PARAM_set_int64(p, (int64_t)val);
}
#endif
return general_set_int(p, &val, sizeof(val));
}
OSSL_PARAM OSSL_PARAM_construct_time_t(const char *key, time_t *buf)
{
return ossl_param_construct(key, OSSL_PARAM_INTEGER, buf, sizeof(time_t));
}
int OSSL_PARAM_get_BN(const OSSL_PARAM *p, BIGNUM **val)
{
BIGNUM *b = NULL;
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
switch (p->data_type) {
case OSSL_PARAM_UNSIGNED_INTEGER:
b = BN_native2bn(p->data, (int)p->data_size, *val);
break;
case OSSL_PARAM_INTEGER:
b = BN_signed_native2bn(p->data, (int)p->data_size, *val);
break;
default:
err_bad_type;
break;
}
if (b == NULL) {
ERR_raise(ERR_LIB_CRYPTO, ERR_R_BN_LIB);
return 0;
}
*val = b;
return 1;
}
int OSSL_PARAM_set_BN(OSSL_PARAM *p, const BIGNUM *val)
{
size_t bytes;
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (val == NULL) {
err_null_argument;
return 0;
}
if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER && BN_is_negative(val)) {
err_bad_type;
return 0;
}
bytes = (size_t)BN_num_bytes(val);
/* We add 1 byte for signed numbers, to make space for a sign extension */
if (p->data_type == OSSL_PARAM_INTEGER)
bytes++;
/* We make sure that at least one byte is used, so zero is properly set */
if (bytes == 0)
bytes++;
p->return_size = bytes;
if (p->data == NULL)
return 1;
if (p->data_size >= bytes) {
p->return_size = p->data_size;
switch (p->data_type) {
case OSSL_PARAM_UNSIGNED_INTEGER:
if (BN_bn2nativepad(val, p->data, p->data_size) >= 0)
return 1;
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_INTEGER_OVERFLOW);
break;
case OSSL_PARAM_INTEGER:
if (BN_signed_bn2native(val, p->data, p->data_size) >= 0)
return 1;
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_INTEGER_OVERFLOW);
break;
default:
err_bad_type;
break;
}
return 0;
}
err_too_small;
return 0;
}
OSSL_PARAM OSSL_PARAM_construct_BN(const char *key, unsigned char *buf,
size_t bsize)
{
return ossl_param_construct(key, OSSL_PARAM_UNSIGNED_INTEGER,
buf, bsize);
}
int OSSL_PARAM_get_double(const OSSL_PARAM *p, double *val)
{
int64_t i64;
uint64_t u64;
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type == OSSL_PARAM_REAL) {
switch (p->data_size) {
case sizeof(double):
*val = *(const double *)p->data;
return 1;
}
err_unsupported_real;
return 0;
} else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
switch (p->data_size) {
case sizeof(uint32_t):
*val = *(const uint32_t *)p->data;
return 1;
case sizeof(uint64_t):
u64 = *(const uint64_t *)p->data;
if ((u64 >> real_shift()) == 0) {
*val = (double)u64;
return 1;
}
err_inexact;
return 0;
}
} else if (p->data_type == OSSL_PARAM_INTEGER) {
switch (p->data_size) {
case sizeof(int32_t):
*val = *(const int32_t *)p->data;
return 1;
case sizeof(int64_t):
i64 = *(const int64_t *)p->data;
u64 = i64 < 0 ? -i64 : i64;
if ((u64 >> real_shift()) == 0) {
*val = 0.0 + i64;
return 1;
}
err_inexact;
return 0;
}
}
err_bad_type;
return 0;
}
int OSSL_PARAM_set_double(OSSL_PARAM *p, double val)
{
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (p->data_type == OSSL_PARAM_REAL) {
p->return_size = sizeof(double);
if (p->data == NULL)
return 1;
switch (p->data_size) {
case sizeof(double):
*(double *)p->data = val;
return 1;
}
err_unsupported_real;
return 0;
} else if (p->data_type == OSSL_PARAM_UNSIGNED_INTEGER) {
p->return_size = sizeof(double);
if (p->data == NULL)
return 1;
if (val != (uint64_t)val) {
err_inexact;
return 0;
}
switch (p->data_size) {
case sizeof(uint32_t):
if (val >= 0 && val <= UINT32_MAX) {
p->return_size = sizeof(uint32_t);
*(uint32_t *)p->data = (uint32_t)val;
return 1;
}
err_out_of_range;
return 0;
case sizeof(uint64_t):
if (val >= 0
/*
* By subtracting 65535 (2^16-1) we cancel the low order
* 15 bits of UINT64_MAX to avoid using imprecise floating
* point values.
*/
&& val < (double)(UINT64_MAX - 65535) + 65536.0) {
p->return_size = sizeof(uint64_t);
*(uint64_t *)p->data = (uint64_t)val;
return 1;
}
err_out_of_range;
return 0;
}
} else if (p->data_type == OSSL_PARAM_INTEGER) {
p->return_size = sizeof(double);
if (p->data == NULL)
return 1;
if (val != (int64_t)val) {
err_inexact;
return 0;
}
switch (p->data_size) {
case sizeof(int32_t):
if (val >= INT32_MIN && val <= INT32_MAX) {
p->return_size = sizeof(int32_t);
*(int32_t *)p->data = (int32_t)val;
return 1;
}
err_out_of_range;
return 0;
case sizeof(int64_t):
if (val >= INT64_MIN
/*
* By subtracting 65535 (2^16-1) we cancel the low order
* 15 bits of INT64_MAX to avoid using imprecise floating
* point values.
*/
&& val < (double)(INT64_MAX - 65535) + 65536.0) {
p->return_size = sizeof(int64_t);
*(int64_t *)p->data = (int64_t)val;
return 1;
}
err_out_of_range;
return 0;
}
}
err_bad_type;
return 0;
}
OSSL_PARAM OSSL_PARAM_construct_double(const char *key, double *buf)
{
return ossl_param_construct(key, OSSL_PARAM_REAL, buf, sizeof(double));
}
static int get_string_internal(const OSSL_PARAM *p, void **val,
size_t *max_len, size_t *used_len,
unsigned int type)
{
size_t sz, alloc_sz;
if ((val == NULL && used_len == NULL) || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type != type) {
err_bad_type;
return 0;
}
sz = p->data_size;
/*
* If the input size is 0, or the input string needs NUL byte
* termination, allocate an extra byte.
*/
alloc_sz = sz + (type == OSSL_PARAM_UTF8_STRING || sz == 0);
if (used_len != NULL)
*used_len = sz;
if (p->data == NULL) {
err_null_argument;
return 0;
}
if (val == NULL)
return 1;
if (*val == NULL) {
char *const q = OPENSSL_malloc(alloc_sz);
if (q == NULL)
return 0;
*val = q;
*max_len = alloc_sz;
}
if (*max_len < sz) {
err_too_small;
return 0;
}
memcpy(*val, p->data, sz);
return 1;
}
int OSSL_PARAM_get_utf8_string(const OSSL_PARAM *p, char **val, size_t max_len)
{
int ret = get_string_internal(p, (void **)val, &max_len, NULL,
OSSL_PARAM_UTF8_STRING);
/*
* We try to ensure that the copied string is terminated with a
* NUL byte. That should be easy, just place a NUL byte at
* |((char*)*val)[p->data_size]|.
* Unfortunately, we have seen cases where |p->data_size| doesn't
* correctly reflect the length of the string, and just happens
* to be out of bounds according to |max_len|, so in that case, we
* make the extra step of trying to find the true length of the
* string that |p->data| points at, and use that as an index to
* place the NUL byte in |*val|.
*/
size_t data_length = p->data_size;
if (ret == 0)
return 0;
if (data_length >= max_len)
data_length = OPENSSL_strnlen(p->data, data_length);
if (data_length >= max_len) {
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_NO_SPACE_FOR_TERMINATING_NULL);
return 0; /* No space for a terminating NUL byte */
}
(*val)[data_length] = '\0';
return ret;
}
int OSSL_PARAM_get_octet_string(const OSSL_PARAM *p, void **val, size_t max_len,
size_t *used_len)
{
return get_string_internal(p, val, &max_len, used_len,
OSSL_PARAM_OCTET_STRING);
}
static int set_string_internal(OSSL_PARAM *p, const void *val, size_t len,
unsigned int type)
{
p->return_size = len;
if (p->data == NULL)
return 1;
if (p->data_type != type) {
err_bad_type;
return 0;
}
if (p->data_size < len) {
err_too_small;
return 0;
}
memcpy(p->data, val, len);
/* If possible within the size of p->data, add a NUL terminator byte */
if (type == OSSL_PARAM_UTF8_STRING && p->data_size > len)
((char *)p->data)[len] = '\0';
return 1;
}
int OSSL_PARAM_set_utf8_string(OSSL_PARAM *p, const char *val)
{
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (val == NULL) {
err_null_argument;
return 0;
}
return set_string_internal(p, val, strlen(val), OSSL_PARAM_UTF8_STRING);
}
int OSSL_PARAM_set_octet_string(OSSL_PARAM *p, const void *val,
size_t len)
{
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
if (val == NULL) {
err_null_argument;
return 0;
}
return set_string_internal(p, val, len, OSSL_PARAM_OCTET_STRING);
}
OSSL_PARAM OSSL_PARAM_construct_utf8_string(const char *key, char *buf,
size_t bsize)
{
if (buf != NULL && bsize == 0)
bsize = strlen(buf);
return ossl_param_construct(key, OSSL_PARAM_UTF8_STRING, buf, bsize);
}
OSSL_PARAM OSSL_PARAM_construct_octet_string(const char *key, void *buf,
size_t bsize)
{
return ossl_param_construct(key, OSSL_PARAM_OCTET_STRING, buf, bsize);
}
static int get_ptr_internal(const OSSL_PARAM *p, const void **val,
size_t *used_len, unsigned int type)
{
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type != type) {
err_bad_type;
return 0;
}
if (used_len != NULL)
*used_len = p->data_size;
*val = *(const void **)p->data;
return 1;
}
int OSSL_PARAM_get_utf8_ptr(const OSSL_PARAM *p, const char **val)
{
return get_ptr_internal(p, (const void **)val, NULL, OSSL_PARAM_UTF8_PTR);
}
int OSSL_PARAM_get_octet_ptr(const OSSL_PARAM *p, const void **val,
size_t *used_len)
{
return get_ptr_internal(p, val, used_len, OSSL_PARAM_OCTET_PTR);
}
static int set_ptr_internal(OSSL_PARAM *p, const void *val,
unsigned int type, size_t len)
{
p->return_size = len;
if (p->data_type != type) {
err_bad_type;
return 0;
}
if (p->data != NULL)
*(const void **)p->data = val;
return 1;
}
int OSSL_PARAM_set_utf8_ptr(OSSL_PARAM *p, const char *val)
{
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
return set_ptr_internal(p, val, OSSL_PARAM_UTF8_PTR,
val == NULL ? 0 : strlen(val));
}
int OSSL_PARAM_set_octet_ptr(OSSL_PARAM *p, const void *val,
size_t used_len)
{
if (p == NULL) {
err_null_argument;
return 0;
}
p->return_size = 0;
return set_ptr_internal(p, val, OSSL_PARAM_OCTET_PTR, used_len);
}
OSSL_PARAM OSSL_PARAM_construct_utf8_ptr(const char *key, char **buf,
size_t bsize)
{
return ossl_param_construct(key, OSSL_PARAM_UTF8_PTR, buf, bsize);
}
OSSL_PARAM OSSL_PARAM_construct_octet_ptr(const char *key, void **buf,
size_t bsize)
{
return ossl_param_construct(key, OSSL_PARAM_OCTET_PTR, buf, bsize);
}
OSSL_PARAM OSSL_PARAM_construct_end(void)
{
OSSL_PARAM end = OSSL_PARAM_END;
return end;
}
static int get_string_ptr_internal(const OSSL_PARAM *p, const void **val,
size_t *used_len, unsigned int type)
{
if (val == NULL || p == NULL) {
err_null_argument;
return 0;
}
if (p->data_type != type) {
err_bad_type;
return 0;
}
if (used_len != NULL)
*used_len = p->data_size;
*val = p->data;
return 1;
}
int OSSL_PARAM_get_utf8_string_ptr(const OSSL_PARAM *p, const char **val)
{
int rv;
ERR_set_mark();
rv = OSSL_PARAM_get_utf8_ptr(p, val);
ERR_pop_to_mark();
return rv || get_string_ptr_internal(p, (const void **)val, NULL,
OSSL_PARAM_UTF8_STRING);
}
int OSSL_PARAM_get_octet_string_ptr(const OSSL_PARAM *p, const void **val,
size_t *used_len)
{
int rv;
ERR_set_mark();
rv = OSSL_PARAM_get_octet_ptr(p, val, used_len);
ERR_pop_to_mark();
return rv || get_string_ptr_internal(p, val, used_len,
OSSL_PARAM_OCTET_STRING);
}
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