diff options
Diffstat (limited to 'contrib/bind9/lib/isc/base64.c')
| -rw-r--r-- | contrib/bind9/lib/isc/base64.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/contrib/bind9/lib/isc/base64.c b/contrib/bind9/lib/isc/base64.c deleted file mode 100644 index bad1565..0000000 --- a/contrib/bind9/lib/isc/base64.c +++ /dev/null @@ -1,252 +0,0 @@ -/* - * Copyright (C) 2004, 2005, 2007, 2009 Internet Systems Consortium, Inc. ("ISC") - * Copyright (C) 1998-2001, 2003 Internet Software Consortium. - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH - * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, - * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM - * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE - * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -/* $Id: base64.c,v 1.34 2009/10/21 23:48:05 tbox Exp $ */ - -/*! \file */ - -#include <config.h> - -#include <isc/base64.h> -#include <isc/buffer.h> -#include <isc/lex.h> -#include <isc/string.h> -#include <isc/util.h> - -#define RETERR(x) do { \ - isc_result_t _r = (x); \ - if (_r != ISC_R_SUCCESS) \ - return (_r); \ - } while (0) - - -/*@{*/ -/*! - * These static functions are also present in lib/dns/rdata.c. I'm not - * sure where they should go. -- bwelling - */ -static isc_result_t -str_totext(const char *source, isc_buffer_t *target); - -static isc_result_t -mem_tobuffer(isc_buffer_t *target, void *base, unsigned int length); - -static const char base64[] = - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; -/*@}*/ - -isc_result_t -isc_base64_totext(isc_region_t *source, int wordlength, - const char *wordbreak, isc_buffer_t *target) -{ - char buf[5]; - unsigned int loops = 0; - - if (wordlength < 4) - wordlength = 4; - - memset(buf, 0, sizeof(buf)); - while (source->length > 2) { - buf[0] = base64[(source->base[0]>>2)&0x3f]; - buf[1] = base64[((source->base[0]<<4)&0x30)| - ((source->base[1]>>4)&0x0f)]; - buf[2] = base64[((source->base[1]<<2)&0x3c)| - ((source->base[2]>>6)&0x03)]; - buf[3] = base64[source->base[2]&0x3f]; - RETERR(str_totext(buf, target)); - isc_region_consume(source, 3); - - loops++; - if (source->length != 0 && - (int)((loops + 1) * 4) >= wordlength) - { - loops = 0; - RETERR(str_totext(wordbreak, target)); - } - } - if (source->length == 2) { - buf[0] = base64[(source->base[0]>>2)&0x3f]; - buf[1] = base64[((source->base[0]<<4)&0x30)| - ((source->base[1]>>4)&0x0f)]; - buf[2] = base64[((source->base[1]<<2)&0x3c)]; - buf[3] = '='; - RETERR(str_totext(buf, target)); - isc_region_consume(source, 2); - } else if (source->length == 1) { - buf[0] = base64[(source->base[0]>>2)&0x3f]; - buf[1] = base64[((source->base[0]<<4)&0x30)]; - buf[2] = buf[3] = '='; - RETERR(str_totext(buf, target)); - isc_region_consume(source, 1); - } - return (ISC_R_SUCCESS); -} - -/*% - * State of a base64 decoding process in progress. - */ -typedef struct { - int length; /*%< Desired length of binary data or -1 */ - isc_buffer_t *target; /*%< Buffer for resulting binary data */ - int digits; /*%< Number of buffered base64 digits */ - isc_boolean_t seen_end; /*%< True if "=" end marker seen */ - int val[4]; -} base64_decode_ctx_t; - -static inline void -base64_decode_init(base64_decode_ctx_t *ctx, int length, isc_buffer_t *target) -{ - ctx->digits = 0; - ctx->seen_end = ISC_FALSE; - ctx->length = length; - ctx->target = target; -} - -static inline isc_result_t -base64_decode_char(base64_decode_ctx_t *ctx, int c) { - char *s; - - if (ctx->seen_end) - return (ISC_R_BADBASE64); - if ((s = strchr(base64, c)) == NULL) - return (ISC_R_BADBASE64); - ctx->val[ctx->digits++] = s - base64; - if (ctx->digits == 4) { - int n; - unsigned char buf[3]; - if (ctx->val[0] == 64 || ctx->val[1] == 64) - return (ISC_R_BADBASE64); - if (ctx->val[2] == 64 && ctx->val[3] != 64) - return (ISC_R_BADBASE64); - /* - * Check that bits that should be zero are. - */ - if (ctx->val[2] == 64 && (ctx->val[1] & 0xf) != 0) - return (ISC_R_BADBASE64); - /* - * We don't need to test for ctx->val[2] != 64 as - * the bottom two bits of 64 are zero. - */ - if (ctx->val[3] == 64 && (ctx->val[2] & 0x3) != 0) - return (ISC_R_BADBASE64); - n = (ctx->val[2] == 64) ? 1 : - (ctx->val[3] == 64) ? 2 : 3; - if (n != 3) { - ctx->seen_end = ISC_TRUE; - if (ctx->val[2] == 64) - ctx->val[2] = 0; - if (ctx->val[3] == 64) - ctx->val[3] = 0; - } - buf[0] = (ctx->val[0]<<2)|(ctx->val[1]>>4); - buf[1] = (ctx->val[1]<<4)|(ctx->val[2]>>2); - buf[2] = (ctx->val[2]<<6)|(ctx->val[3]); - RETERR(mem_tobuffer(ctx->target, buf, n)); - if (ctx->length >= 0) { - if (n > ctx->length) - return (ISC_R_BADBASE64); - else - ctx->length -= n; - } - ctx->digits = 0; - } - return (ISC_R_SUCCESS); -} - -static inline isc_result_t -base64_decode_finish(base64_decode_ctx_t *ctx) { - if (ctx->length > 0) - return (ISC_R_UNEXPECTEDEND); - if (ctx->digits != 0) - return (ISC_R_BADBASE64); - return (ISC_R_SUCCESS); -} - -isc_result_t -isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length) { - base64_decode_ctx_t ctx; - isc_textregion_t *tr; - isc_token_t token; - isc_boolean_t eol; - - base64_decode_init(&ctx, length, target); - - while (!ctx.seen_end && (ctx.length != 0)) { - unsigned int i; - - if (length > 0) - eol = ISC_FALSE; - else - eol = ISC_TRUE; - RETERR(isc_lex_getmastertoken(lexer, &token, - isc_tokentype_string, eol)); - if (token.type != isc_tokentype_string) - break; - tr = &token.value.as_textregion; - for (i = 0; i < tr->length; i++) - RETERR(base64_decode_char(&ctx, tr->base[i])); - } - if (ctx.length < 0 && !ctx.seen_end) - isc_lex_ungettoken(lexer, &token); - RETERR(base64_decode_finish(&ctx)); - return (ISC_R_SUCCESS); -} - -isc_result_t -isc_base64_decodestring(const char *cstr, isc_buffer_t *target) { - base64_decode_ctx_t ctx; - - base64_decode_init(&ctx, -1, target); - for (;;) { - int c = *cstr++; - if (c == '\0') - break; - if (c == ' ' || c == '\t' || c == '\n' || c== '\r') - continue; - RETERR(base64_decode_char(&ctx, c)); - } - RETERR(base64_decode_finish(&ctx)); - return (ISC_R_SUCCESS); -} - -static isc_result_t -str_totext(const char *source, isc_buffer_t *target) { - unsigned int l; - isc_region_t region; - - isc_buffer_availableregion(target, ®ion); - l = strlen(source); - - if (l > region.length) - return (ISC_R_NOSPACE); - - memcpy(region.base, source, l); - isc_buffer_add(target, l); - return (ISC_R_SUCCESS); -} - -static isc_result_t -mem_tobuffer(isc_buffer_t *target, void *base, unsigned int length) { - isc_region_t tr; - - isc_buffer_availableregion(target, &tr); - if (length > tr.length) - return (ISC_R_NOSPACE); - memcpy(tr.base, base, length); - isc_buffer_add(target, length); - return (ISC_R_SUCCESS); -} |
