X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fencode.c;h=17198ff6bebeb74a3f882f0f1c0f972f5c2d7cdc;hp=985fd29d8fa4f841159c8e1655b2a0d29796ddc5;hb=79204b9cd7bbaaf524de9bc83d96e2d320d7538c;hpb=3cdd1e94b1d71f2ce3002738f9506da91fe2af45 diff --git a/crypto/evp/encode.c b/crypto/evp/encode.c index 985fd29d8f..17198ff6be 100644 --- a/crypto/evp/encode.c +++ b/crypto/evp/encode.c @@ -1,68 +1,21 @@ -/* 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 1995-2016 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 +#include #include "internal/cryptlib.h" #include +#include "evp_locl.h" +static unsigned char conv_ascii2bin(unsigned char a); #ifndef CHARSET_EBCDIC # define conv_bin2ascii(a) (data_bin2ascii[(a)&0x3f]) -# define conv_ascii2bin(a) (data_ascii2bin[(a)&0x7f]) #else /* * We assume that PEM encoded files are EBCDIC files (i.e., printable text @@ -71,7 +24,6 @@ * as the underlying textstring data_bin2ascii[] is already EBCDIC) */ # define conv_bin2ascii(a) (data_bin2ascii[(a)&0x3f]) -# define conv_ascii2bin(a) (data_ascii2bin[os_toascii[a]&0x7f]) #endif /*- @@ -103,7 +55,7 @@ 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, @@ -124,6 +76,45 @@ static const unsigned char data_ascii2bin[128] = { 0x31, 0x32, 0x33, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, }; +#ifndef CHARSET_EBCDIC +static unsigned char conv_ascii2bin(unsigned char a) +{ + if (a & 0x80) + return B64_ERROR; + return data_ascii2bin[a]; +} +#else +static unsigned char conv_ascii2bin(unsigned char a) +{ + a = os_toascii[a]; + if (a & 0x80) + return B64_ERROR; + return data_ascii2bin[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_EncodeInit(EVP_ENCODE_CTX *ctx) { ctx->length = 48; @@ -131,20 +122,20 @@ void EVP_EncodeInit(EVP_ENCODE_CTX *ctx) ctx->line_num = 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; - unsigned int total = 0; + size_t total = 0; *outl = 0; if (inl <= 0) - return; + return 0; OPENSSL_assert(ctx->length <= (int)sizeof(ctx->enc_data)); - if ((ctx->num + inl) < ctx->length) { + 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; @@ -158,7 +149,7 @@ void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, *out = '\0'; total = j + 1; } - while (inl >= ctx->length) { + while (inl >= ctx->length && total <= INT_MAX) { j = EVP_EncodeBlock(out, in, ctx->length); in += ctx->length; inl -= ctx->length; @@ -167,10 +158,17 @@ void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, *out = '\0'; total += j + 1; } + if (total > INT_MAX) { + /* Too much output data! */ + *outl = 0; + 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) @@ -214,7 +212,7 @@ int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen) } *t = '\0'; - return (ret); + return ret; } void EVP_DecodeInit(EVP_ENCODE_CTX *ctx) @@ -328,13 +326,13 @@ 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); - n = 0; - if (decoded_len < 0 || eof > decoded_len) { - rv = -1; - goto end; - } - ret += (decoded_len - eof); + decoded_len = EVP_DecodeBlock(out, d, n); + n = 0; + if (decoded_len < 0 || eof > decoded_len) { + rv = -1; + goto end; + } + ret += (decoded_len - eof); } else if (seof) { /* EOF in the middle of a base64 block. */ rv = -1; @@ -347,7 +345,7 @@ 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) @@ -369,7 +367,7 @@ int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n) n--; if (n % 4 != 0) - return (-1); + return -1; for (i = 0; i < n; i += 4) { a = conv_ascii2bin(*(f++)); @@ -377,7 +375,7 @@ int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n) c = conv_ascii2bin(*(f++)); d = conv_ascii2bin(*(f++)); 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))); @@ -386,7 +384,7 @@ 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_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) @@ -397,10 +395,10 @@ int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) if (ctx->num != 0) { i = EVP_DecodeBlock(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; }