| /* |
| * Copyright 1995-2021 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 <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <openssl/crypto.h> |
| #include "internal/bio.h" |
| #include <openssl/err.h> |
| #include "ssl_local.h" |
| |
| static int ssl_write(BIO *h, const char *buf, size_t size, size_t *written); |
| static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes); |
| static int ssl_puts(BIO *h, const char *str); |
| static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| static int ssl_new(BIO *h); |
| static int ssl_free(BIO *data); |
| static long ssl_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp); |
| typedef struct bio_ssl_st { |
| SSL *ssl; /* The ssl handle :-) */ |
| /* re-negotiate every time the total number of bytes is this size */ |
| int num_renegotiates; |
| unsigned long renegotiate_count; |
| size_t byte_count; |
| unsigned long renegotiate_timeout; |
| unsigned long last_time; |
| } BIO_SSL; |
| |
| static const BIO_METHOD methods_sslp = { |
| BIO_TYPE_SSL, |
| "ssl", |
| ssl_write, |
| NULL, /* ssl_write_old, */ |
| ssl_read, |
| NULL, /* ssl_read_old, */ |
| ssl_puts, |
| NULL, /* ssl_gets, */ |
| ssl_ctrl, |
| ssl_new, |
| ssl_free, |
| ssl_callback_ctrl, |
| }; |
| |
| const BIO_METHOD *BIO_f_ssl(void) |
| { |
| return &methods_sslp; |
| } |
| |
| static int ssl_new(BIO *bi) |
| { |
| BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs)); |
| |
| if (bs == NULL) { |
| BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| BIO_set_init(bi, 0); |
| BIO_set_data(bi, bs); |
| /* Clear all flags */ |
| BIO_clear_flags(bi, ~0); |
| |
| return 1; |
| } |
| |
| static int ssl_free(BIO *a) |
| { |
| BIO_SSL *bs; |
| |
| if (a == NULL) |
| return 0; |
| bs = BIO_get_data(a); |
| if (BIO_get_shutdown(a)) { |
| if (bs->ssl != NULL) |
| SSL_shutdown(bs->ssl); |
| if (BIO_get_init(a)) |
| SSL_free(bs->ssl); |
| BIO_clear_flags(a, ~0); /* Clear all flags */ |
| BIO_set_init(a, 0); |
| } |
| OPENSSL_free(bs); |
| return 1; |
| } |
| |
| static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes) |
| { |
| int ret = 1; |
| BIO_SSL *sb; |
| SSL *ssl; |
| int retry_reason = 0; |
| int r = 0; |
| |
| if (buf == NULL) |
| return 0; |
| sb = BIO_get_data(b); |
| ssl = sb->ssl; |
| |
| BIO_clear_retry_flags(b); |
| |
| ret = ssl_read_internal(ssl, buf, size, readbytes); |
| |
| switch (SSL_get_error(ssl, ret)) { |
| case SSL_ERROR_NONE: |
| if (sb->renegotiate_count > 0) { |
| sb->byte_count += *readbytes; |
| if (sb->byte_count > sb->renegotiate_count) { |
| sb->byte_count = 0; |
| sb->num_renegotiates++; |
| SSL_renegotiate(ssl); |
| r = 1; |
| } |
| } |
| if ((sb->renegotiate_timeout > 0) && (!r)) { |
| unsigned long tm; |
| |
| tm = (unsigned long)time(NULL); |
| if (tm > sb->last_time + sb->renegotiate_timeout) { |
| sb->last_time = tm; |
| sb->num_renegotiates++; |
| SSL_renegotiate(ssl); |
| } |
| } |
| |
| break; |
| case SSL_ERROR_WANT_READ: |
| BIO_set_retry_read(b); |
| break; |
| case SSL_ERROR_WANT_WRITE: |
| BIO_set_retry_write(b); |
| break; |
| case SSL_ERROR_WANT_X509_LOOKUP: |
| BIO_set_retry_special(b); |
| retry_reason = BIO_RR_SSL_X509_LOOKUP; |
| break; |
| case SSL_ERROR_WANT_ACCEPT: |
| BIO_set_retry_special(b); |
| retry_reason = BIO_RR_ACCEPT; |
| break; |
| case SSL_ERROR_WANT_CONNECT: |
| BIO_set_retry_special(b); |
| retry_reason = BIO_RR_CONNECT; |
| break; |
| case SSL_ERROR_SYSCALL: |
| case SSL_ERROR_SSL: |
| case SSL_ERROR_ZERO_RETURN: |
| default: |
| break; |
| } |
| |
| BIO_set_retry_reason(b, retry_reason); |
| |
| return ret; |
| } |
| |
| static int ssl_write(BIO *b, const char *buf, size_t size, size_t *written) |
| { |
| int ret, r = 0; |
| int retry_reason = 0; |
| SSL *ssl; |
| BIO_SSL *bs; |
| |
| if (buf == NULL) |
| return 0; |
| bs = BIO_get_data(b); |
| ssl = bs->ssl; |
| |
| BIO_clear_retry_flags(b); |
| |
| ret = ssl_write_internal(ssl, buf, size, written); |
| |
| switch (SSL_get_error(ssl, ret)) { |
| case SSL_ERROR_NONE: |
| if (bs->renegotiate_count > 0) { |
| bs->byte_count += *written; |
| if (bs->byte_count > bs->renegotiate_count) { |
| bs->byte_count = 0; |
| bs->num_renegotiates++; |
| SSL_renegotiate(ssl); |
| r = 1; |
| } |
| } |
| if ((bs->renegotiate_timeout > 0) && (!r)) { |
| unsigned long tm; |
| |
| tm = (unsigned long)time(NULL); |
| if (tm > bs->last_time + bs->renegotiate_timeout) { |
| bs->last_time = tm; |
| bs->num_renegotiates++; |
| SSL_renegotiate(ssl); |
| } |
| } |
| break; |
| case SSL_ERROR_WANT_WRITE: |
| BIO_set_retry_write(b); |
| break; |
| case SSL_ERROR_WANT_READ: |
| BIO_set_retry_read(b); |
| break; |
| case SSL_ERROR_WANT_X509_LOOKUP: |
| BIO_set_retry_special(b); |
| retry_reason = BIO_RR_SSL_X509_LOOKUP; |
| break; |
| case SSL_ERROR_WANT_CONNECT: |
| BIO_set_retry_special(b); |
| retry_reason = BIO_RR_CONNECT; |
| case SSL_ERROR_SYSCALL: |
| case SSL_ERROR_SSL: |
| default: |
| break; |
| } |
| |
| BIO_set_retry_reason(b, retry_reason); |
| |
| return ret; |
| } |
| |
| static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr) |
| { |
| SSL **sslp, *ssl; |
| BIO_SSL *bs, *dbs; |
| BIO *dbio, *bio; |
| long ret = 1; |
| BIO *next; |
| |
| bs = BIO_get_data(b); |
| next = BIO_next(b); |
| ssl = bs->ssl; |
| if ((ssl == NULL) && (cmd != BIO_C_SET_SSL)) |
| return 0; |
| switch (cmd) { |
| case BIO_CTRL_RESET: |
| SSL_shutdown(ssl); |
| |
| if (ssl->handshake_func == ssl->method->ssl_connect) |
| SSL_set_connect_state(ssl); |
| else if (ssl->handshake_func == ssl->method->ssl_accept) |
| SSL_set_accept_state(ssl); |
| |
| if (!SSL_clear(ssl)) { |
| ret = 0; |
| break; |
| } |
| |
| if (next != NULL) |
| ret = BIO_ctrl(next, cmd, num, ptr); |
| else if (ssl->rbio != NULL) |
| ret = BIO_ctrl(ssl->rbio, cmd, num, ptr); |
| else |
| ret = 1; |
| break; |
| case BIO_CTRL_INFO: |
| ret = 0; |
| break; |
| case BIO_C_SSL_MODE: |
| if (num) /* client mode */ |
| SSL_set_connect_state(ssl); |
| else |
| SSL_set_accept_state(ssl); |
| break; |
| case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT: |
| ret = bs->renegotiate_timeout; |
| if (num < 60) |
| num = 5; |
| bs->renegotiate_timeout = (unsigned long)num; |
| bs->last_time = (unsigned long)time(NULL); |
| break; |
| case BIO_C_SET_SSL_RENEGOTIATE_BYTES: |
| ret = bs->renegotiate_count; |
| if ((long)num >= 512) |
| bs->renegotiate_count = (unsigned long)num; |
| break; |
| case BIO_C_GET_SSL_NUM_RENEGOTIATES: |
| ret = bs->num_renegotiates; |
| break; |
| case BIO_C_SET_SSL: |
| if (ssl != NULL) { |
| ssl_free(b); |
| if (!ssl_new(b)) |
| return 0; |
| bs = BIO_get_data(b); |
| } |
| BIO_set_shutdown(b, num); |
| ssl = (SSL *)ptr; |
| bs->ssl = ssl; |
| bio = SSL_get_rbio(ssl); |
| if (bio != NULL) { |
| if (next != NULL) |
| BIO_push(bio, next); |
| BIO_set_next(b, bio); |
| BIO_up_ref(bio); |
| } |
| BIO_set_init(b, 1); |
| break; |
| case BIO_C_GET_SSL: |
| if (ptr != NULL) { |
| sslp = (SSL **)ptr; |
| *sslp = ssl; |
| } else |
| ret = 0; |
| break; |
| case BIO_CTRL_GET_CLOSE: |
| ret = BIO_get_shutdown(b); |
| break; |
| case BIO_CTRL_SET_CLOSE: |
| BIO_set_shutdown(b, (int)num); |
| break; |
| case BIO_CTRL_WPENDING: |
| ret = BIO_ctrl(ssl->wbio, cmd, num, ptr); |
| break; |
| case BIO_CTRL_PENDING: |
| ret = SSL_pending(ssl); |
| if (ret == 0) |
| ret = BIO_pending(ssl->rbio); |
| break; |
| case BIO_CTRL_FLUSH: |
| BIO_clear_retry_flags(b); |
| ret = BIO_ctrl(ssl->wbio, cmd, num, ptr); |
| BIO_copy_next_retry(b); |
| break; |
| case BIO_CTRL_PUSH: |
| if ((next != NULL) && (next != ssl->rbio)) { |
| /* |
| * We are going to pass ownership of next to the SSL object...but |
| * we don't own a reference to pass yet - so up ref |
| */ |
| BIO_up_ref(next); |
| SSL_set_bio(ssl, next, next); |
| } |
| break; |
| case BIO_CTRL_POP: |
| /* Only detach if we are the BIO explicitly being popped */ |
| if (b == ptr) { |
| /* This will clear the reference we obtained during push */ |
| SSL_set_bio(ssl, NULL, NULL); |
| } |
| break; |
| case BIO_C_DO_STATE_MACHINE: |
| BIO_clear_retry_flags(b); |
| |
| BIO_set_retry_reason(b, 0); |
| ret = (int)SSL_do_handshake(ssl); |
| |
| switch (SSL_get_error(ssl, (int)ret)) { |
| case SSL_ERROR_WANT_READ: |
| BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY); |
| break; |
| case SSL_ERROR_WANT_WRITE: |
| BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY); |
| break; |
| case SSL_ERROR_WANT_CONNECT: |
| BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY); |
| BIO_set_retry_reason(b, BIO_get_retry_reason(next)); |
| break; |
| case SSL_ERROR_WANT_X509_LOOKUP: |
| BIO_set_retry_special(b); |
| BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP); |
| break; |
| default: |
| break; |
| } |
| break; |
| case BIO_CTRL_DUP: |
| dbio = (BIO *)ptr; |
| dbs = BIO_get_data(dbio); |
| SSL_free(dbs->ssl); |
| dbs->ssl = SSL_dup(ssl); |
| dbs->num_renegotiates = bs->num_renegotiates; |
| dbs->renegotiate_count = bs->renegotiate_count; |
| dbs->byte_count = bs->byte_count; |
| dbs->renegotiate_timeout = bs->renegotiate_timeout; |
| dbs->last_time = bs->last_time; |
| ret = (dbs->ssl != NULL); |
| break; |
| case BIO_C_GET_FD: |
| ret = BIO_ctrl(ssl->rbio, cmd, num, ptr); |
| break; |
| case BIO_CTRL_SET_CALLBACK: |
| ret = 0; /* use callback ctrl */ |
| break; |
| default: |
| ret = BIO_ctrl(ssl->rbio, cmd, num, ptr); |
| break; |
| } |
| return ret; |
| } |
| |
| static long ssl_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp) |
| { |
| SSL *ssl; |
| BIO_SSL *bs; |
| long ret = 1; |
| |
| bs = BIO_get_data(b); |
| ssl = bs->ssl; |
| switch (cmd) { |
| case BIO_CTRL_SET_CALLBACK: |
| ret = BIO_callback_ctrl(ssl->rbio, cmd, fp); |
| break; |
| default: |
| ret = 0; |
| break; |
| } |
| return ret; |
| } |
| |
| static int ssl_puts(BIO *bp, const char *str) |
| { |
| int n, ret; |
| |
| n = strlen(str); |
| ret = BIO_write(bp, str, n); |
| return ret; |
| } |
| |
| BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx) |
| { |
| #ifndef OPENSSL_NO_SOCK |
| BIO *ret = NULL, *buf = NULL, *ssl = NULL; |
| |
| if ((buf = BIO_new(BIO_f_buffer())) == NULL) |
| return NULL; |
| if ((ssl = BIO_new_ssl_connect(ctx)) == NULL) |
| goto err; |
| if ((ret = BIO_push(buf, ssl)) == NULL) |
| goto err; |
| return ret; |
| err: |
| BIO_free(buf); |
| BIO_free(ssl); |
| #endif |
| return NULL; |
| } |
| |
| BIO *BIO_new_ssl_connect(SSL_CTX *ctx) |
| { |
| #ifndef OPENSSL_NO_SOCK |
| BIO *ret = NULL, *con = NULL, *ssl = NULL; |
| |
| if ((con = BIO_new(BIO_s_connect())) == NULL) |
| return NULL; |
| if ((ssl = BIO_new_ssl(ctx, 1)) == NULL) |
| goto err; |
| if ((ret = BIO_push(ssl, con)) == NULL) |
| goto err; |
| return ret; |
| err: |
| BIO_free(ssl); |
| BIO_free(con); |
| #endif |
| return NULL; |
| } |
| |
| BIO *BIO_new_ssl(SSL_CTX *ctx, int client) |
| { |
| BIO *ret; |
| SSL *ssl; |
| |
| if ((ret = BIO_new(BIO_f_ssl())) == NULL) |
| return NULL; |
| if ((ssl = SSL_new(ctx)) == NULL) { |
| BIO_free(ret); |
| return NULL; |
| } |
| if (client) |
| SSL_set_connect_state(ssl); |
| else |
| SSL_set_accept_state(ssl); |
| |
| BIO_set_ssl(ret, ssl, BIO_CLOSE); |
| return ret; |
| } |
| |
| int BIO_ssl_copy_session_id(BIO *t, BIO *f) |
| { |
| BIO_SSL *tdata, *fdata; |
| t = BIO_find_type(t, BIO_TYPE_SSL); |
| f = BIO_find_type(f, BIO_TYPE_SSL); |
| if ((t == NULL) || (f == NULL)) |
| return 0; |
| tdata = BIO_get_data(t); |
| fdata = BIO_get_data(f); |
| if ((tdata->ssl == NULL) || (fdata->ssl == NULL)) |
| return 0; |
| if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl))) |
| return 0; |
| return 1; |
| } |
| |
| void BIO_ssl_shutdown(BIO *b) |
| { |
| BIO_SSL *bdata; |
| |
| for (; b != NULL; b = BIO_next(b)) { |
| if (BIO_method_type(b) != BIO_TYPE_SSL) |
| continue; |
| bdata = BIO_get_data(b); |
| if (bdata != NULL && bdata->ssl != NULL) |
| SSL_shutdown(bdata->ssl); |
| } |
| } |