mirror of
https://github.com/pineappleEA/pineapple-src.git
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208 lines
4.4 KiB
C
Executable File
208 lines
4.4 KiB
C
Executable File
/* $OpenBSD: ssl_transcript.c,v 1.2 2020/02/05 16:47:34 jsing Exp $ */
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/*
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* Copyright (c) 2017 Joel Sing <jsing@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "ssl_locl.h"
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#include <openssl/ssl.h>
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int
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tls1_transcript_hash_init(SSL *s)
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{
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const unsigned char *data;
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const EVP_MD *md;
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size_t len;
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tls1_transcript_hash_free(s);
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if (!ssl_get_handshake_evp_md(s, &md)) {
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SSLerrorx(ERR_R_INTERNAL_ERROR);
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goto err;
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}
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if ((S3I(s)->handshake_hash = EVP_MD_CTX_new()) == NULL) {
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SSLerror(s, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!EVP_DigestInit_ex(S3I(s)->handshake_hash, md, NULL)) {
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SSLerror(s, ERR_R_EVP_LIB);
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goto err;
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}
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if (!tls1_transcript_data(s, &data, &len)) {
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SSLerror(s, SSL_R_BAD_HANDSHAKE_LENGTH);
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goto err;
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}
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if (!tls1_transcript_hash_update(s, data, len)) {
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SSLerror(s, ERR_R_EVP_LIB);
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goto err;
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}
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return 1;
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err:
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tls1_transcript_hash_free(s);
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return 0;
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}
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int
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tls1_transcript_hash_update(SSL *s, const unsigned char *buf, size_t len)
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{
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if (S3I(s)->handshake_hash == NULL)
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return 1;
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return EVP_DigestUpdate(S3I(s)->handshake_hash, buf, len);
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}
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int
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tls1_transcript_hash_value(SSL *s, const unsigned char *out, size_t len,
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size_t *outlen)
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{
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EVP_MD_CTX *mdctx = NULL;
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unsigned int mdlen;
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int ret = 0;
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if (EVP_MD_CTX_size(S3I(s)->handshake_hash) > len)
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goto err;
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if ((mdctx = EVP_MD_CTX_new()) == NULL) {
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SSLerror(s, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!EVP_MD_CTX_copy_ex(mdctx, S3I(s)->handshake_hash)) {
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SSLerror(s, ERR_R_EVP_LIB);
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goto err;
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}
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if (!EVP_DigestFinal_ex(mdctx, (unsigned char *)out, &mdlen)) {
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SSLerror(s, ERR_R_EVP_LIB);
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goto err;
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}
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if (outlen != NULL)
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*outlen = mdlen;
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ret = 1;
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err:
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EVP_MD_CTX_free(mdctx);
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return (ret);
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}
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void
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tls1_transcript_hash_free(SSL *s)
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{
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EVP_MD_CTX_free(S3I(s)->handshake_hash);
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S3I(s)->handshake_hash = NULL;
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}
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int
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tls1_transcript_init(SSL *s)
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{
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if (S3I(s)->handshake_transcript != NULL)
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return 0;
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if ((S3I(s)->handshake_transcript = BUF_MEM_new()) == NULL)
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return 0;
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tls1_transcript_reset(s);
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return 1;
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}
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void
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tls1_transcript_free(SSL *s)
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{
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BUF_MEM_free(S3I(s)->handshake_transcript);
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S3I(s)->handshake_transcript = NULL;
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}
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void
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tls1_transcript_reset(SSL *s)
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{
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/*
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* We should check the return value of BUF_MEM_grow_clean(), however
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* due to yet another bad API design, when called with a length of zero
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* it is impossible to tell if it succeeded (returning a length of zero)
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* or if it failed (and returned zero)... our implementation never
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* fails with a length of zero, so we trust all is okay...
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*/
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(void)BUF_MEM_grow_clean(S3I(s)->handshake_transcript, 0);
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tls1_transcript_unfreeze(s);
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}
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int
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tls1_transcript_append(SSL *s, const unsigned char *buf, size_t len)
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{
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size_t olen, nlen;
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if (S3I(s)->handshake_transcript == NULL)
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return 1;
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if (s->s3->flags & TLS1_FLAGS_FREEZE_TRANSCRIPT)
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return 1;
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olen = S3I(s)->handshake_transcript->length;
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nlen = olen + len;
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if (nlen < olen)
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return 0;
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if (BUF_MEM_grow(S3I(s)->handshake_transcript, nlen) == 0)
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return 0;
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memcpy(S3I(s)->handshake_transcript->data + olen, buf, len);
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return 1;
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}
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int
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tls1_transcript_data(SSL *s, const unsigned char **data, size_t *len)
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{
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if (S3I(s)->handshake_transcript == NULL)
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return 0;
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*data = S3I(s)->handshake_transcript->data;
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*len = S3I(s)->handshake_transcript->length;
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return 1;
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}
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void
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tls1_transcript_freeze(SSL *s)
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{
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s->s3->flags |= TLS1_FLAGS_FREEZE_TRANSCRIPT;
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}
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void
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tls1_transcript_unfreeze(SSL *s)
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{
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s->s3->flags &= ~TLS1_FLAGS_FREEZE_TRANSCRIPT;
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}
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int
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tls1_transcript_record(SSL *s, const unsigned char *buf, size_t len)
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{
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if (!tls1_transcript_hash_update(s, buf, len))
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return 0;
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if (!tls1_transcript_append(s, buf, len))
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return 0;
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return 1;
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}
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