diff options
Diffstat (limited to 'package/ead/src/tinysrp/bn_ctx.c')
| -rw-r--r-- | package/ead/src/tinysrp/bn_ctx.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/package/ead/src/tinysrp/bn_ctx.c b/package/ead/src/tinysrp/bn_ctx.c new file mode 100644 index 000000000..20a6605ab --- /dev/null +++ b/package/ead/src/tinysrp/bn_ctx.c @@ -0,0 +1,142 @@ +/* crypto/bn/bn_ctx.c */ +/* Written by Ulf Moeller for the OpenSSL project. */ +/* ==================================================================== + * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. + * + * 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 above 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#ifndef BN_CTX_DEBUG +# undef NDEBUG /* avoid conflicting definitions */ +# define NDEBUG +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <assert.h> +#include <bn.h> + + +BN_CTX *BN_CTX_new(void) + { + BN_CTX *ret; + + ret=(BN_CTX *)malloc(sizeof(BN_CTX)); + if (ret == NULL) + { + return(NULL); + } + + BN_CTX_init(ret); + ret->flags=BN_FLG_MALLOCED; + return(ret); + } + +void BN_CTX_init(BN_CTX *ctx) + { + int i; + ctx->tos = 0; + ctx->flags = 0; + ctx->depth = 0; + ctx->too_many = 0; + for (i = 0; i < BN_CTX_NUM; i++) + BN_init(&(ctx->bn[i])); + } + +void BN_CTX_free(BN_CTX *ctx) + { + int i; + + if (ctx == NULL) return; + assert(ctx->depth == 0); + + for (i=0; i < BN_CTX_NUM; i++) + BN_clear_free(&(ctx->bn[i])); + if (ctx->flags & BN_FLG_MALLOCED) + free(ctx); + } + +void BN_CTX_start(BN_CTX *ctx) + { + if (ctx->depth < BN_CTX_NUM_POS) + ctx->pos[ctx->depth] = ctx->tos; + ctx->depth++; + } + +BIGNUM *BN_CTX_get(BN_CTX *ctx) + { + if (ctx->depth > BN_CTX_NUM_POS || ctx->tos >= BN_CTX_NUM) + { + if (!ctx->too_many) + { + /* disable error code until BN_CTX_end is called: */ + ctx->too_many = 1; + } + return NULL; + } + return (&(ctx->bn[ctx->tos++])); + } + +void BN_CTX_end(BN_CTX *ctx) + { + if (ctx == NULL) return; + assert(ctx->depth > 0); + if (ctx->depth == 0) + /* should never happen, but we can tolerate it if not in + * debug mode (could be a 'goto err' in the calling function + * before BN_CTX_start was reached) */ + BN_CTX_start(ctx); + + ctx->too_many = 0; + ctx->depth--; + if (ctx->depth < BN_CTX_NUM_POS) + ctx->tos = ctx->pos[ctx->depth]; + } |