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-rw-r--r--crypto/evp/encode.c296
1 files changed, 157 insertions, 139 deletions
diff --git a/crypto/evp/encode.c b/crypto/evp/encode.c
index c6c775e0a0cd..da32d4fd1973 100644
--- a/crypto/evp/encode.c
+++ b/crypto/evp/encode.c
@@ -1,69 +1,28 @@
-/* crypto/evp/encode.c */
-/* 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.
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * 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.]
+ * Licensed under the OpenSSL license (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 <stdio.h>
#include <limits.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/evp.h>
+#include "evp_locl.h"
+#include "internal/evp_int.h"
+
+static unsigned char conv_ascii2bin(unsigned char a,
+ const unsigned char *table);
+static int evp_encodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t,
+ const unsigned char *f, int dlen);
+static int evp_decodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t,
+ const unsigned char *f, int n);
-static unsigned char conv_ascii2bin(unsigned char a);
#ifndef CHARSET_EBCDIC
-# define conv_bin2ascii(a) (data_bin2ascii[(a)&0x3f])
+# define conv_bin2ascii(a, table) ((table)[(a)&0x3f])
#else
/*
* We assume that PEM encoded files are EBCDIC files (i.e., printable text
@@ -71,7 +30,7 @@ static unsigned char conv_ascii2bin(unsigned char a);
* (text) format again. (No need for conversion in the conv_bin2ascii macro,
* as the underlying textstring data_bin2ascii[] is already EBCDIC)
*/
-# define conv_bin2ascii(a) (data_bin2ascii[(a)&0x3f])
+# define conv_bin2ascii(a, table) ((table)[(a)&0x3f])
#endif
/*-
@@ -86,8 +45,13 @@ static unsigned char conv_ascii2bin(unsigned char a);
#define CHUNKS_PER_LINE (64/4)
#define CHAR_PER_LINE (64+1)
-static const unsigned char data_bin2ascii[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ\
-abcdefghijklmnopqrstuvwxyz0123456789+/";
+static const unsigned char data_bin2ascii[65] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/* SRP uses a different base64 alphabet */
+static const unsigned char srpdata_bin2ascii[65] =
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./";
+
/*-
* 0xF0 is a EOLN
@@ -103,7 +67,7 @@ abcdefghijklmnopqrstuvwxyz0123456789+/";
#define B64_WS 0xE0
#define B64_ERROR 0xFF
#define B64_NOT_BASE64(a) (((a)|0x13) == 0xF3)
-#define B64_BASE64(a) !B64_NOT_BASE64(a)
+#define B64_BASE64(a) (!B64_NOT_BASE64(a))
static const unsigned char data_ascii2bin[128] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
@@ -124,31 +88,78 @@ static const unsigned char data_ascii2bin[128] = {
0x31, 0x32, 0x33, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
};
+static const unsigned char srpdata_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, 0xFF, 0xFF, 0xF2, 0x3E, 0x3F,
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF,
+ 0xFF, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10,
+ 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
+ 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
+ 0x21, 0x22, 0x23, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A,
+ 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32,
+ 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A,
+ 0x3B, 0x3C, 0x3D, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+};
+
#ifndef CHARSET_EBCDIC
-static unsigned char conv_ascii2bin(unsigned char a)
+static unsigned char conv_ascii2bin(unsigned char a, const unsigned char *table)
{
if (a & 0x80)
return B64_ERROR;
- return data_ascii2bin[a];
+ return table[a];
}
#else
-static unsigned char conv_ascii2bin(unsigned char a)
+static unsigned char conv_ascii2bin(unsigned char a, const unsigned char *table)
{
a = os_toascii[a];
if (a & 0x80)
return B64_ERROR;
- return data_ascii2bin[a];
+ return table[a];
}
#endif
+EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void)
+{
+ return OPENSSL_zalloc(sizeof(EVP_ENCODE_CTX));
+}
+
+void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx)
+{
+ OPENSSL_free(ctx);
+}
+
+int EVP_ENCODE_CTX_copy(EVP_ENCODE_CTX *dctx, EVP_ENCODE_CTX *sctx)
+{
+ memcpy(dctx, sctx, sizeof(EVP_ENCODE_CTX));
+
+ return 1;
+}
+
+int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx)
+{
+ return ctx->num;
+}
+
+void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags)
+{
+ ctx->flags = flags;
+}
+
void EVP_EncodeInit(EVP_ENCODE_CTX *ctx)
{
ctx->length = 48;
ctx->num = 0;
ctx->line_num = 0;
+ ctx->flags = 0;
}
-void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
+int EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
int i, j;
@@ -156,43 +167,51 @@ void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
*outl = 0;
if (inl <= 0)
- return;
+ return 0;
OPENSSL_assert(ctx->length <= (int)sizeof(ctx->enc_data));
if (ctx->length - ctx->num > inl) {
memcpy(&(ctx->enc_data[ctx->num]), in, inl);
ctx->num += inl;
- return;
+ return 1;
}
if (ctx->num != 0) {
i = ctx->length - ctx->num;
memcpy(&(ctx->enc_data[ctx->num]), in, i);
in += i;
inl -= i;
- j = EVP_EncodeBlock(out, ctx->enc_data, ctx->length);
+ j = evp_encodeblock_int(ctx, out, ctx->enc_data, ctx->length);
ctx->num = 0;
out += j;
- *(out++) = '\n';
+ total = j;
+ if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) {
+ *(out++) = '\n';
+ total++;
+ }
*out = '\0';
- total = j + 1;
}
while (inl >= ctx->length && total <= INT_MAX) {
- j = EVP_EncodeBlock(out, in, ctx->length);
+ j = evp_encodeblock_int(ctx, out, in, ctx->length);
in += ctx->length;
inl -= ctx->length;
out += j;
- *(out++) = '\n';
+ total += j;
+ if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) {
+ *(out++) = '\n';
+ total++;
+ }
*out = '\0';
- total += j + 1;
}
if (total > INT_MAX) {
/* Too much output data! */
*outl = 0;
- return;
+ return 0;
}
if (inl != 0)
memcpy(&(ctx->enc_data[0]), in, inl);
ctx->num = inl;
*outl = total;
+
+ return 1;
}
void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl)
@@ -200,35 +219,43 @@ void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl)
unsigned int ret = 0;
if (ctx->num != 0) {
- ret = EVP_EncodeBlock(out, ctx->enc_data, ctx->num);
- out[ret++] = '\n';
+ ret = evp_encodeblock_int(ctx, out, ctx->enc_data, ctx->num);
+ if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0)
+ out[ret++] = '\n';
out[ret] = '\0';
ctx->num = 0;
}
*outl = ret;
}
-int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen)
+static int evp_encodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t,
+ const unsigned char *f, int dlen)
{
int i, ret = 0;
unsigned long l;
+ const unsigned char *table;
+
+ if (ctx != NULL && (ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0)
+ table = srpdata_bin2ascii;
+ else
+ table = data_bin2ascii;
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);
+ *(t++) = conv_bin2ascii(l >> 18L, table);
+ *(t++) = conv_bin2ascii(l >> 12L, table);
+ *(t++) = conv_bin2ascii(l >> 6L, table);
+ *(t++) = conv_bin2ascii(l, table);
} 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++) = conv_bin2ascii(l >> 18L, table);
+ *(t++) = conv_bin2ascii(l >> 12L, table);
+ *(t++) = (i == 1) ? '=' : conv_bin2ascii(l >> 6L, table);
*(t++) = '=';
}
ret += 4;
@@ -236,16 +263,21 @@ int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen)
}
*t = '\0';
- return (ret);
+ return ret;
+}
+
+int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen)
+{
+ return evp_encodeblock_int(NULL, t, f, dlen);
}
void EVP_DecodeInit(EVP_ENCODE_CTX *ctx)
{
- /* Only ctx->num is used during decoding. */
+ /* Only ctx->num and ctx->flags are used during decoding. */
ctx->num = 0;
ctx->length = 0;
ctx->line_num = 0;
- ctx->expect_nl = 0;
+ ctx->flags = 0;
}
/*-
@@ -273,6 +305,7 @@ int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
{
int seof = 0, eof = 0, rv = -1, ret = 0, i, v, tmp, n, decoded_len;
unsigned char *d;
+ const unsigned char *table;
n = ctx->num;
d = ctx->enc_data;
@@ -289,9 +322,14 @@ int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
goto end;
}
+ if ((ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0)
+ table = srpdata_ascii2bin;
+ else
+ table = data_ascii2bin;
+
for (i = 0; i < inl; i++) {
tmp = *(in++);
- v = conv_ascii2bin(tmp);
+ v = conv_ascii2bin(tmp, table);
if (v == B64_ERROR) {
rv = -1;
goto end;
@@ -331,7 +369,7 @@ int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
}
if (n == 64) {
- decoded_len = EVP_DecodeBlock(out, d, n);
+ decoded_len = evp_decodeblock_int(ctx, out, d, n);
n = 0;
if (decoded_len < 0 || eof > decoded_len) {
rv = -1;
@@ -350,7 +388,7 @@ int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
tail:
if (n > 0) {
if ((n & 3) == 0) {
- decoded_len = EVP_DecodeBlock(out, d, n);
+ decoded_len = evp_decodeblock_int(ctx, out, d, n);
n = 0;
if (decoded_len < 0 || eof > decoded_len) {
rv = -1;
@@ -369,16 +407,23 @@ end:
/* Legacy behaviour. This should probably rather be zeroed on error. */
*outl = ret;
ctx->num = n;
- return (rv);
+ return rv;
}
-int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n)
+static int evp_decodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t,
+ const unsigned char *f, int n)
{
int i, ret = 0, a, b, c, d;
unsigned long l;
+ const unsigned char *table;
+
+ if (ctx != NULL && (ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0)
+ table = srpdata_ascii2bin;
+ else
+ table = data_ascii2bin;
/* trim white space from the start of the line. */
- while ((conv_ascii2bin(*f) == B64_WS) && (n > 0)) {
+ while ((conv_ascii2bin(*f, table) == B64_WS) && (n > 0)) {
f++;
n--;
}
@@ -387,19 +432,19 @@ int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int 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]))))
+ while ((n > 3) && (B64_NOT_BASE64(conv_ascii2bin(f[n - 1], table))))
n--;
if (n % 4 != 0)
- return (-1);
+ 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++));
+ a = conv_ascii2bin(*(f++), table);
+ b = conv_ascii2bin(*(f++), table);
+ c = conv_ascii2bin(*(f++), table);
+ d = conv_ascii2bin(*(f++), table);
if ((a & 0x80) || (b & 0x80) || (c & 0x80) || (d & 0x80))
- return (-1);
+ return -1;
l = ((((unsigned long)a) << 18L) |
(((unsigned long)b) << 12L) |
(((unsigned long)c) << 6L) | (((unsigned long)d)));
@@ -408,7 +453,12 @@ int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n)
*(t++) = (unsigned char)(l) & 0xff;
ret += 3;
}
- return (ret);
+ return ret;
+}
+
+int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n)
+{
+ return evp_decodeblock_int(NULL, t, f, n);
}
int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl)
@@ -417,44 +467,12 @@ int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl)
*outl = 0;
if (ctx->num != 0) {
- i = EVP_DecodeBlock(out, ctx->enc_data, ctx->num);
+ i = evp_decodeblock_int(ctx, out, ctx->enc_data, ctx->num);
if (i < 0)
- return (-1);
+ return -1;
ctx->num = 0;
*outl = i;
- return (1);
+ return 1;
} else
- return (1);
+ return 1;
}
-
-#ifdef undef
-int EVP_DecodeValid(unsigned char *buf, int len)
-{
- int i, num = 0, bad = 0;
-
- if (len == 0)
- return (-1);
- while (conv_ascii2bin(*buf) == B64_WS) {
- buf++;
- len--;
- if (len == 0)
- return (-1);
- }
-
- for (i = len; i >= 4; i -= 4) {
- if ((conv_ascii2bin(buf[0]) >= 0x40) ||
- (conv_ascii2bin(buf[1]) >= 0x40) ||
- (conv_ascii2bin(buf[2]) >= 0x40) ||
- (conv_ascii2bin(buf[3]) >= 0x40))
- return (-1);
- buf += 4;
- num += 1 + (buf[2] != '=') + (buf[3] != '=');
- }
- if ((i == 1) && (conv_ascii2bin(buf[0]) == B64_EOLN))
- return (num);
- if ((i == 2) && (conv_ascii2bin(buf[0]) == B64_EOLN) &&
- (conv_ascii2bin(buf[0]) == B64_EOLN))
- return (num);
- return (1);
-}
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-22 17:20:59 +0000