X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fencode.c;h=da32d4fd19734efb3934c532637508183452d426;hp=36affe56261d281594a522d9ea3fb3e63b1254d7;hb=39df51522ba2e3773ae2f1d4df5a6031ef41c1ba;hpb=b785504a10310cb2872270eb409b70971be5e76e diff --git a/crypto/evp/encode.c b/crypto/evp/encode.c index 36affe5626..da32d4fd19 100644 --- a/crypto/evp/encode.c +++ b/crypto/evp/encode.c @@ -1,68 +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 +#include #include "internal/cryptlib.h" #include +#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 @@ -70,7 +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 /*- @@ -85,8 +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 @@ -102,7 +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, @@ -123,70 +88,130 @@ 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; - 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; 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) { - j = EVP_EncodeBlock(out, in, ctx->length); + while (inl >= ctx->length && total <= INT_MAX) { + 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 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) @@ -194,35 +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; @@ -230,16 +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; } /*- @@ -267,6 +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; @@ -283,9 +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; @@ -325,7 +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; @@ -344,13 +388,13 @@ 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_int(ctx, 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; @@ -363,16 +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--; } @@ -381,19 +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))); @@ -402,7 +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) @@ -411,12 +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; }