From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001 From: Wojtek Kosior Date: Fri, 30 Apr 2021 00:33:56 +0200 Subject: initial/final commit --- openssl-1.1.0h/crypto/bio/bf_buff.c | 455 ++++++++++++++++++++++++++++++++++++ 1 file changed, 455 insertions(+) create mode 100644 openssl-1.1.0h/crypto/bio/bf_buff.c (limited to 'openssl-1.1.0h/crypto/bio/bf_buff.c') diff --git a/openssl-1.1.0h/crypto/bio/bf_buff.c b/openssl-1.1.0h/crypto/bio/bf_buff.c new file mode 100644 index 0000000..8509956 --- /dev/null +++ b/openssl-1.1.0h/crypto/bio/bf_buff.c @@ -0,0 +1,455 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * 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 "bio_lcl.h" +#include "internal/cryptlib.h" + +static int buffer_write(BIO *h, const char *buf, int num); +static int buffer_read(BIO *h, char *buf, int size); +static int buffer_puts(BIO *h, const char *str); +static int buffer_gets(BIO *h, char *str, int size); +static long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2); +static int buffer_new(BIO *h); +static int buffer_free(BIO *data); +static long buffer_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp); +#define DEFAULT_BUFFER_SIZE 4096 + +static const BIO_METHOD methods_buffer = { + BIO_TYPE_BUFFER, + "buffer", + buffer_write, + buffer_read, + buffer_puts, + buffer_gets, + buffer_ctrl, + buffer_new, + buffer_free, + buffer_callback_ctrl, +}; + +const BIO_METHOD *BIO_f_buffer(void) +{ + return (&methods_buffer); +} + +static int buffer_new(BIO *bi) +{ + BIO_F_BUFFER_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); + + if (ctx == NULL) + return (0); + ctx->ibuf_size = DEFAULT_BUFFER_SIZE; + ctx->ibuf = OPENSSL_malloc(DEFAULT_BUFFER_SIZE); + if (ctx->ibuf == NULL) { + OPENSSL_free(ctx); + return (0); + } + ctx->obuf_size = DEFAULT_BUFFER_SIZE; + ctx->obuf = OPENSSL_malloc(DEFAULT_BUFFER_SIZE); + if (ctx->obuf == NULL) { + OPENSSL_free(ctx->ibuf); + OPENSSL_free(ctx); + return (0); + } + + bi->init = 1; + bi->ptr = (char *)ctx; + bi->flags = 0; + return (1); +} + +static int buffer_free(BIO *a) +{ + BIO_F_BUFFER_CTX *b; + + if (a == NULL) + return (0); + b = (BIO_F_BUFFER_CTX *)a->ptr; + OPENSSL_free(b->ibuf); + OPENSSL_free(b->obuf); + OPENSSL_free(a->ptr); + a->ptr = NULL; + a->init = 0; + a->flags = 0; + return (1); +} + +static int buffer_read(BIO *b, char *out, int outl) +{ + int i, num = 0; + BIO_F_BUFFER_CTX *ctx; + + if (out == NULL) + return (0); + ctx = (BIO_F_BUFFER_CTX *)b->ptr; + + if ((ctx == NULL) || (b->next_bio == NULL)) + return (0); + num = 0; + BIO_clear_retry_flags(b); + + start: + i = ctx->ibuf_len; + /* If there is stuff left over, grab it */ + if (i != 0) { + if (i > outl) + i = outl; + memcpy(out, &(ctx->ibuf[ctx->ibuf_off]), i); + ctx->ibuf_off += i; + ctx->ibuf_len -= i; + num += i; + if (outl == i) + return (num); + outl -= i; + out += i; + } + + /* + * We may have done a partial read. try to do more. We have nothing in + * the buffer. If we get an error and have read some data, just return it + * and let them retry to get the error again. copy direct to parent + * address space + */ + if (outl > ctx->ibuf_size) { + for (;;) { + i = BIO_read(b->next_bio, out, outl); + if (i <= 0) { + BIO_copy_next_retry(b); + if (i < 0) + return ((num > 0) ? num : i); + if (i == 0) + return (num); + } + num += i; + if (outl == i) + return (num); + out += i; + outl -= i; + } + } + /* else */ + + /* we are going to be doing some buffering */ + i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size); + if (i <= 0) { + BIO_copy_next_retry(b); + if (i < 0) + return ((num > 0) ? num : i); + if (i == 0) + return (num); + } + ctx->ibuf_off = 0; + ctx->ibuf_len = i; + + /* Lets re-read using ourselves :-) */ + goto start; +} + +static int buffer_write(BIO *b, const char *in, int inl) +{ + int i, num = 0; + BIO_F_BUFFER_CTX *ctx; + + if ((in == NULL) || (inl <= 0)) + return (0); + ctx = (BIO_F_BUFFER_CTX *)b->ptr; + if ((ctx == NULL) || (b->next_bio == NULL)) + return (0); + + BIO_clear_retry_flags(b); + start: + i = ctx->obuf_size - (ctx->obuf_len + ctx->obuf_off); + /* add to buffer and return */ + if (i >= inl) { + memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, inl); + ctx->obuf_len += inl; + return (num + inl); + } + /* else */ + /* stuff already in buffer, so add to it first, then flush */ + if (ctx->obuf_len != 0) { + if (i > 0) { /* lets fill it up if we can */ + memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, i); + in += i; + inl -= i; + num += i; + ctx->obuf_len += i; + } + /* we now have a full buffer needing flushing */ + for (;;) { + i = BIO_write(b->next_bio, &(ctx->obuf[ctx->obuf_off]), + ctx->obuf_len); + if (i <= 0) { + BIO_copy_next_retry(b); + + if (i < 0) + return ((num > 0) ? num : i); + if (i == 0) + return (num); + } + ctx->obuf_off += i; + ctx->obuf_len -= i; + if (ctx->obuf_len == 0) + break; + } + } + /* + * we only get here if the buffer has been flushed and we still have + * stuff to write + */ + ctx->obuf_off = 0; + + /* we now have inl bytes to write */ + while (inl >= ctx->obuf_size) { + i = BIO_write(b->next_bio, in, inl); + if (i <= 0) { + BIO_copy_next_retry(b); + if (i < 0) + return ((num > 0) ? num : i); + if (i == 0) + return (num); + } + num += i; + in += i; + inl -= i; + if (inl == 0) + return (num); + } + + /* + * copy the rest into the buffer since we have only a small amount left + */ + goto start; +} + +static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) +{ + BIO *dbio; + BIO_F_BUFFER_CTX *ctx; + long ret = 1; + char *p1, *p2; + int r, i, *ip; + int ibs, obs; + + ctx = (BIO_F_BUFFER_CTX *)b->ptr; + + switch (cmd) { + case BIO_CTRL_RESET: + ctx->ibuf_off = 0; + ctx->ibuf_len = 0; + ctx->obuf_off = 0; + ctx->obuf_len = 0; + if (b->next_bio == NULL) + return (0); + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + break; + case BIO_CTRL_INFO: + ret = (long)ctx->obuf_len; + break; + case BIO_C_GET_BUFF_NUM_LINES: + ret = 0; + p1 = ctx->ibuf; + for (i = 0; i < ctx->ibuf_len; i++) { + if (p1[ctx->ibuf_off + i] == '\n') + ret++; + } + break; + case BIO_CTRL_WPENDING: + ret = (long)ctx->obuf_len; + if (ret == 0) { + if (b->next_bio == NULL) + return (0); + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + } + break; + case BIO_CTRL_PENDING: + ret = (long)ctx->ibuf_len; + if (ret == 0) { + if (b->next_bio == NULL) + return (0); + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + } + break; + case BIO_C_SET_BUFF_READ_DATA: + if (num > ctx->ibuf_size) { + p1 = OPENSSL_malloc((int)num); + if (p1 == NULL) + goto malloc_error; + OPENSSL_free(ctx->ibuf); + ctx->ibuf = p1; + } + ctx->ibuf_off = 0; + ctx->ibuf_len = (int)num; + memcpy(ctx->ibuf, ptr, (int)num); + ret = 1; + break; + case BIO_C_SET_BUFF_SIZE: + if (ptr != NULL) { + ip = (int *)ptr; + if (*ip == 0) { + ibs = (int)num; + obs = ctx->obuf_size; + } else { /* if (*ip == 1) */ + + ibs = ctx->ibuf_size; + obs = (int)num; + } + } else { + ibs = (int)num; + obs = (int)num; + } + p1 = ctx->ibuf; + p2 = ctx->obuf; + if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) { + p1 = OPENSSL_malloc((int)num); + if (p1 == NULL) + goto malloc_error; + } + if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) { + p2 = OPENSSL_malloc((int)num); + if (p2 == NULL) { + if (p1 != ctx->ibuf) + OPENSSL_free(p1); + goto malloc_error; + } + } + if (ctx->ibuf != p1) { + OPENSSL_free(ctx->ibuf); + ctx->ibuf = p1; + ctx->ibuf_off = 0; + ctx->ibuf_len = 0; + ctx->ibuf_size = ibs; + } + if (ctx->obuf != p2) { + OPENSSL_free(ctx->obuf); + ctx->obuf = p2; + ctx->obuf_off = 0; + ctx->obuf_len = 0; + ctx->obuf_size = obs; + } + break; + case BIO_C_DO_STATE_MACHINE: + if (b->next_bio == NULL) + return (0); + BIO_clear_retry_flags(b); + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + BIO_copy_next_retry(b); + break; + + case BIO_CTRL_FLUSH: + if (b->next_bio == NULL) + return (0); + if (ctx->obuf_len <= 0) { + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + break; + } + + for (;;) { + BIO_clear_retry_flags(b); + if (ctx->obuf_len > 0) { + r = BIO_write(b->next_bio, + &(ctx->obuf[ctx->obuf_off]), ctx->obuf_len); + BIO_copy_next_retry(b); + if (r <= 0) + return ((long)r); + ctx->obuf_off += r; + ctx->obuf_len -= r; + } else { + ctx->obuf_len = 0; + ctx->obuf_off = 0; + break; + } + } + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + break; + case BIO_CTRL_DUP: + dbio = (BIO *)ptr; + if (!BIO_set_read_buffer_size(dbio, ctx->ibuf_size) || + !BIO_set_write_buffer_size(dbio, ctx->obuf_size)) + ret = 0; + break; + default: + if (b->next_bio == NULL) + return (0); + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + break; + } + return (ret); + malloc_error: + BIOerr(BIO_F_BUFFER_CTRL, ERR_R_MALLOC_FAILURE); + return (0); +} + +static long buffer_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp) +{ + long ret = 1; + + if (b->next_bio == NULL) + return (0); + switch (cmd) { + default: + ret = BIO_callback_ctrl(b->next_bio, cmd, fp); + break; + } + return (ret); +} + +static int buffer_gets(BIO *b, char *buf, int size) +{ + BIO_F_BUFFER_CTX *ctx; + int num = 0, i, flag; + char *p; + + ctx = (BIO_F_BUFFER_CTX *)b->ptr; + size--; /* reserve space for a '\0' */ + BIO_clear_retry_flags(b); + + for (;;) { + if (ctx->ibuf_len > 0) { + p = &(ctx->ibuf[ctx->ibuf_off]); + flag = 0; + for (i = 0; (i < ctx->ibuf_len) && (i < size); i++) { + *(buf++) = p[i]; + if (p[i] == '\n') { + flag = 1; + i++; + break; + } + } + num += i; + size -= i; + ctx->ibuf_len -= i; + ctx->ibuf_off += i; + if (flag || size == 0) { + *buf = '\0'; + return (num); + } + } else { /* read another chunk */ + + i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size); + if (i <= 0) { + BIO_copy_next_retry(b); + *buf = '\0'; + if (i < 0) + return ((num > 0) ? num : i); + if (i == 0) + return (num); + } + ctx->ibuf_len = i; + ctx->ibuf_off = 0; + } + } +} + +static int buffer_puts(BIO *b, const char *str) +{ + return (buffer_write(b, str, strlen(str))); +} -- cgit v1.2.3