diff options
Diffstat (limited to 'openssl/crypto/bio/bss_bio.c')
| -rw-r--r-- | openssl/crypto/bio/bss_bio.c | 1476 |
1 files changed, 719 insertions, 757 deletions
diff --git a/openssl/crypto/bio/bss_bio.c b/openssl/crypto/bio/bss_bio.c index 52ef0ebcb..d629a37a5 100644 --- a/openssl/crypto/bio/bss_bio.c +++ b/openssl/crypto/bio/bss_bio.c @@ -7,7 +7,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -53,12 +53,13 @@ * */ -/* Special method for a BIO where the other endpoint is also a BIO - * of this kind, handled by the same thread (i.e. the "peer" is actually - * ourselves, wearing a different hat). - * Such "BIO pairs" are mainly for using the SSL library with I/O interfaces - * for which no specific BIO method is available. - * See ssl/ssltest.c for some hints on how this can be used. */ +/* + * Special method for a BIO where the other endpoint is also a BIO of this + * kind, handled by the same thread (i.e. the "peer" is actually ourselves, + * wearing a different hat). Such "BIO pairs" are mainly for using the SSL + * library with I/O interfaces for which no specific BIO method is available. + * See ssl/ssltest.c for some hints on how this can be used. + */ /* BIO_DEBUG implies BIO_PAIR_DEBUG */ #ifdef BIO_DEBUG @@ -103,822 +104,783 @@ static int bio_puts(BIO *bio, const char *str); static int bio_make_pair(BIO *bio1, BIO *bio2); static void bio_destroy_pair(BIO *bio); -static BIO_METHOD methods_biop = -{ - BIO_TYPE_BIO, - "BIO pair", - bio_write, - bio_read, - bio_puts, - NULL /* no bio_gets */, - bio_ctrl, - bio_new, - bio_free, - NULL /* no bio_callback_ctrl */ +static BIO_METHOD methods_biop = { + BIO_TYPE_BIO, + "BIO pair", + bio_write, + bio_read, + bio_puts, + NULL /* no bio_gets */ , + bio_ctrl, + bio_new, + bio_free, + NULL /* no bio_callback_ctrl */ }; BIO_METHOD *BIO_s_bio(void) - { - return &methods_biop; - } - -struct bio_bio_st { - BIO *peer; /* NULL if buf == NULL. - * If peer != NULL, then peer->ptr is also a bio_bio_st, - * and its "peer" member points back to us. - * peer != NULL iff init != 0 in the BIO. */ - - /* This is for what we write (i.e. reading uses peer's struct): */ - int closed; /* valid iff peer != NULL */ - size_t len; /* valid iff buf != NULL; 0 if peer == NULL */ - size_t offset; /* valid iff buf != NULL; 0 if len == 0 */ - size_t size; - char *buf; /* "size" elements (if != NULL) */ - - size_t request; /* valid iff peer != NULL; 0 if len != 0, - * otherwise set by peer to number of bytes - * it (unsuccessfully) tried to read, - * never more than buffer space (size-len) warrants. */ + return &methods_biop; +} + +struct bio_bio_st { + BIO *peer; /* NULL if buf == NULL. If peer != NULL, then + * peer->ptr is also a bio_bio_st, and its + * "peer" member points back to us. peer != + * NULL iff init != 0 in the BIO. */ + /* This is for what we write (i.e. reading uses peer's struct): */ + int closed; /* valid iff peer != NULL */ + size_t len; /* valid iff buf != NULL; 0 if peer == NULL */ + size_t offset; /* valid iff buf != NULL; 0 if len == 0 */ + size_t size; + char *buf; /* "size" elements (if != NULL) */ + size_t request; /* valid iff peer != NULL; 0 if len != 0, + * otherwise set by peer to number of bytes + * it (unsuccessfully) tried to read, never + * more than buffer space (size-len) + * warrants. */ }; static int bio_new(BIO *bio) - { - struct bio_bio_st *b; - - b = OPENSSL_malloc(sizeof *b); - if (b == NULL) - return 0; +{ + struct bio_bio_st *b; - b->peer = NULL; - b->size = 17*1024; /* enough for one TLS record (just a default) */ - b->buf = NULL; + b = OPENSSL_malloc(sizeof *b); + if (b == NULL) + return 0; - bio->ptr = b; - return 1; - } + b->peer = NULL; + /* enough for one TLS record (just a default) */ + b->size = 17 * 1024; + b->buf = NULL; + bio->ptr = b; + return 1; +} static int bio_free(BIO *bio) - { - struct bio_bio_st *b; - - if (bio == NULL) - return 0; - b = bio->ptr; +{ + struct bio_bio_st *b; - assert(b != NULL); + if (bio == NULL) + return 0; + b = bio->ptr; - if (b->peer) - bio_destroy_pair(bio); - - if (b->buf != NULL) - { - OPENSSL_free(b->buf); - } + assert(b != NULL); - OPENSSL_free(b); + if (b->peer) + bio_destroy_pair(bio); - return 1; - } + if (b->buf != NULL) { + OPENSSL_free(b->buf); + } + OPENSSL_free(b); + return 1; +} static int bio_read(BIO *bio, char *buf, int size_) - { - size_t size = size_; - size_t rest; - struct bio_bio_st *b, *peer_b; - - BIO_clear_retry_flags(bio); - - if (!bio->init) - return 0; - - b = bio->ptr; - assert(b != NULL); - assert(b->peer != NULL); - peer_b = b->peer->ptr; - assert(peer_b != NULL); - assert(peer_b->buf != NULL); - - peer_b->request = 0; /* will be set in "retry_read" situation */ - - if (buf == NULL || size == 0) - return 0; - - if (peer_b->len == 0) - { - if (peer_b->closed) - return 0; /* writer has closed, and no data is left */ - else - { - BIO_set_retry_read(bio); /* buffer is empty */ - if (size <= peer_b->size) - peer_b->request = size; - else - /* don't ask for more than the peer can - * deliver in one write */ - peer_b->request = peer_b->size; - return -1; - } - } - - /* we can read */ - if (peer_b->len < size) - size = peer_b->len; - - /* now read "size" bytes */ - - rest = size; - - assert(rest > 0); - do /* one or two iterations */ - { - size_t chunk; - - assert(rest <= peer_b->len); - if (peer_b->offset + rest <= peer_b->size) - chunk = rest; - else - /* wrap around ring buffer */ - chunk = peer_b->size - peer_b->offset; - assert(peer_b->offset + chunk <= peer_b->size); - - memcpy(buf, peer_b->buf + peer_b->offset, chunk); - - peer_b->len -= chunk; - if (peer_b->len) - { - peer_b->offset += chunk; - assert(peer_b->offset <= peer_b->size); - if (peer_b->offset == peer_b->size) - peer_b->offset = 0; - buf += chunk; - } - else - { - /* buffer now empty, no need to advance "buf" */ - assert(chunk == rest); - peer_b->offset = 0; - } - rest -= chunk; - } - while (rest); - - return size; - } - -/* non-copying interface: provide pointer to available data in buffer +{ + size_t size = size_; + size_t rest; + struct bio_bio_st *b, *peer_b; + + BIO_clear_retry_flags(bio); + + if (!bio->init) + return 0; + + b = bio->ptr; + assert(b != NULL); + assert(b->peer != NULL); + peer_b = b->peer->ptr; + assert(peer_b != NULL); + assert(peer_b->buf != NULL); + + peer_b->request = 0; /* will be set in "retry_read" situation */ + + if (buf == NULL || size == 0) + return 0; + + if (peer_b->len == 0) { + if (peer_b->closed) + return 0; /* writer has closed, and no data is left */ + else { + BIO_set_retry_read(bio); /* buffer is empty */ + if (size <= peer_b->size) + peer_b->request = size; + else + /* + * don't ask for more than the peer can deliver in one write + */ + peer_b->request = peer_b->size; + return -1; + } + } + + /* we can read */ + if (peer_b->len < size) + size = peer_b->len; + + /* now read "size" bytes */ + + rest = size; + + assert(rest > 0); + do { /* one or two iterations */ + size_t chunk; + + assert(rest <= peer_b->len); + if (peer_b->offset + rest <= peer_b->size) + chunk = rest; + else + /* wrap around ring buffer */ + chunk = peer_b->size - peer_b->offset; + assert(peer_b->offset + chunk <= peer_b->size); + + memcpy(buf, peer_b->buf + peer_b->offset, chunk); + + peer_b->len -= chunk; + if (peer_b->len) { + peer_b->offset += chunk; + assert(peer_b->offset <= peer_b->size); + if (peer_b->offset == peer_b->size) + peer_b->offset = 0; + buf += chunk; + } else { + /* buffer now empty, no need to advance "buf" */ + assert(chunk == rest); + peer_b->offset = 0; + } + rest -= chunk; + } + while (rest); + + return size; +} + +/*- + * non-copying interface: provide pointer to available data in buffer * bio_nread0: return number of available bytes * bio_nread: also advance index * (example usage: bio_nread0(), read from buffer, bio_nread() * or just bio_nread(), read from buffer) */ -/* WARNING: The non-copying interface is largely untested as of yet - * and may contain bugs. */ +/* + * WARNING: The non-copying interface is largely untested as of yet and may + * contain bugs. + */ static ossl_ssize_t bio_nread0(BIO *bio, char **buf) - { - struct bio_bio_st *b, *peer_b; - ossl_ssize_t num; - - BIO_clear_retry_flags(bio); - - if (!bio->init) - return 0; - - b = bio->ptr; - assert(b != NULL); - assert(b->peer != NULL); - peer_b = b->peer->ptr; - assert(peer_b != NULL); - assert(peer_b->buf != NULL); - - peer_b->request = 0; - - if (peer_b->len == 0) - { - char dummy; - - /* avoid code duplication -- nothing available for reading */ - return bio_read(bio, &dummy, 1); /* returns 0 or -1 */ - } - - num = peer_b->len; - if (peer_b->size < peer_b->offset + num) - /* no ring buffer wrap-around for non-copying interface */ - num = peer_b->size - peer_b->offset; - assert(num > 0); - - if (buf != NULL) - *buf = peer_b->buf + peer_b->offset; - return num; - } +{ + struct bio_bio_st *b, *peer_b; + ossl_ssize_t num; -static ossl_ssize_t bio_nread(BIO *bio, char **buf, size_t num_) - { - struct bio_bio_st *b, *peer_b; - ossl_ssize_t num, available; - - if (num_ > SSIZE_MAX) - num = SSIZE_MAX; - else - num = (ossl_ssize_t)num_; - - available = bio_nread0(bio, buf); - if (num > available) - num = available; - if (num <= 0) - return num; - - b = bio->ptr; - peer_b = b->peer->ptr; - - peer_b->len -= num; - if (peer_b->len) - { - peer_b->offset += num; - assert(peer_b->offset <= peer_b->size); - if (peer_b->offset == peer_b->size) - peer_b->offset = 0; - } - else - peer_b->offset = 0; - - return num; - } + BIO_clear_retry_flags(bio); + + if (!bio->init) + return 0; + + b = bio->ptr; + assert(b != NULL); + assert(b->peer != NULL); + peer_b = b->peer->ptr; + assert(peer_b != NULL); + assert(peer_b->buf != NULL); + + peer_b->request = 0; + if (peer_b->len == 0) { + char dummy; + + /* avoid code duplication -- nothing available for reading */ + return bio_read(bio, &dummy, 1); /* returns 0 or -1 */ + } + + num = peer_b->len; + if (peer_b->size < peer_b->offset + num) + /* no ring buffer wrap-around for non-copying interface */ + num = peer_b->size - peer_b->offset; + assert(num > 0); + + if (buf != NULL) + *buf = peer_b->buf + peer_b->offset; + return num; +} + +static ossl_ssize_t bio_nread(BIO *bio, char **buf, size_t num_) +{ + struct bio_bio_st *b, *peer_b; + ossl_ssize_t num, available; + + if (num_ > SSIZE_MAX) + num = SSIZE_MAX; + else + num = (ossl_ssize_t) num_; + + available = bio_nread0(bio, buf); + if (num > available) + num = available; + if (num <= 0) + return num; + + b = bio->ptr; + peer_b = b->peer->ptr; + + peer_b->len -= num; + if (peer_b->len) { + peer_b->offset += num; + assert(peer_b->offset <= peer_b->size); + if (peer_b->offset == peer_b->size) + peer_b->offset = 0; + } else + peer_b->offset = 0; + + return num; +} static int bio_write(BIO *bio, const char *buf, int num_) - { - size_t num = num_; - size_t rest; - struct bio_bio_st *b; - - BIO_clear_retry_flags(bio); - - if (!bio->init || buf == NULL || num == 0) - return 0; - - b = bio->ptr; - assert(b != NULL); - assert(b->peer != NULL); - assert(b->buf != NULL); - - b->request = 0; - if (b->closed) - { - /* we already closed */ - BIOerr(BIO_F_BIO_WRITE, BIO_R_BROKEN_PIPE); - return -1; - } - - assert(b->len <= b->size); - - if (b->len == b->size) - { - BIO_set_retry_write(bio); /* buffer is full */ - return -1; - } - - /* we can write */ - if (num > b->size - b->len) - num = b->size - b->len; - - /* now write "num" bytes */ - - rest = num; - - assert(rest > 0); - do /* one or two iterations */ - { - size_t write_offset; - size_t chunk; - - assert(b->len + rest <= b->size); - - write_offset = b->offset + b->len; - if (write_offset >= b->size) - write_offset -= b->size; - /* b->buf[write_offset] is the first byte we can write to. */ - - if (write_offset + rest <= b->size) - chunk = rest; - else - /* wrap around ring buffer */ - chunk = b->size - write_offset; - - memcpy(b->buf + write_offset, buf, chunk); - - b->len += chunk; - - assert(b->len <= b->size); - - rest -= chunk; - buf += chunk; - } - while (rest); - - return num; - } - -/* non-copying interface: provide pointer to region to write to +{ + size_t num = num_; + size_t rest; + struct bio_bio_st *b; + + BIO_clear_retry_flags(bio); + + if (!bio->init || buf == NULL || num == 0) + return 0; + + b = bio->ptr; + assert(b != NULL); + assert(b->peer != NULL); + assert(b->buf != NULL); + + b->request = 0; + if (b->closed) { + /* we already closed */ + BIOerr(BIO_F_BIO_WRITE, BIO_R_BROKEN_PIPE); + return -1; + } + + assert(b->len <= b->size); + + if (b->len == b->size) { + BIO_set_retry_write(bio); /* buffer is full */ + return -1; + } + + /* we can write */ + if (num > b->size - b->len) + num = b->size - b->len; + + /* now write "num" bytes */ + + rest = num; + + assert(rest > 0); + do { /* one or two iterations */ + size_t write_offset; + size_t chunk; + + assert(b->len + rest <= b->size); + + write_offset = b->offset + b->len; + if (write_offset >= b->size) + write_offset -= b->size; + /* b->buf[write_offset] is the first byte we can write to. */ + + if (write_offset + rest <= b->size) + chunk = rest; + else + /* wrap around ring buffer */ + chunk = b->size - write_offset; + + memcpy(b->buf + write_offset, buf, chunk); + + b->len += chunk; + + assert(b->len <= b->size); + + rest -= chunk; + buf += chunk; + } + while (rest); + + return num; +} + +/*- + * non-copying interface: provide pointer to region to write to * bio_nwrite0: check how much space is available * bio_nwrite: also increase length * (example usage: bio_nwrite0(), write to buffer, bio_nwrite() * or just bio_nwrite(), write to buffer) */ static ossl_ssize_t bio_nwrite0(BIO *bio, char **buf) - { - struct bio_bio_st *b; - size_t num; - size_t write_offset; - - BIO_clear_retry_flags(bio); - - if (!bio->init) - return 0; - - b = bio->ptr; - assert(b != NULL); - assert(b->peer != NULL); - assert(b->buf != NULL); - - b->request = 0; - if (b->closed) - { - BIOerr(BIO_F_BIO_NWRITE0, BIO_R_BROKEN_PIPE); - return -1; - } - - assert(b->len <= b->size); - - if (b->len == b->size) - { - BIO_set_retry_write(bio); - return -1; - } - - num = b->size - b->len; - write_offset = b->offset + b->len; - if (write_offset >= b->size) - write_offset -= b->size; - if (write_offset + num > b->size) - /* no ring buffer wrap-around for non-copying interface - * (to fulfil the promise by BIO_ctrl_get_write_guarantee, - * BIO_nwrite may have to be called twice) */ - num = b->size - write_offset; - - if (buf != NULL) - *buf = b->buf + write_offset; - assert(write_offset + num <= b->size); - - return num; - } +{ + struct bio_bio_st *b; + size_t num; + size_t write_offset; + + BIO_clear_retry_flags(bio); + + if (!bio->init) + return 0; + + b = bio->ptr; + assert(b != NULL); + assert(b->peer != NULL); + assert(b->buf != NULL); + + b->request = 0; + if (b->closed) { + BIOerr(BIO_F_BIO_NWRITE0, BIO_R_BROKEN_PIPE); + return -1; + } + + assert(b->len <= b->size); + + if (b->len == b->size) { + BIO_set_retry_write(bio); + return -1; + } + + num = b->size - b->len; + write_offset = b->offset + b->len; + if (write_offset >= b->size) + write_offset -= b->size; + if (write_offset + num > b->size) + /* + * no ring buffer wrap-around for non-copying interface (to fulfil + * the promise by BIO_ctrl_get_write_guarantee, BIO_nwrite may have + * to be called twice) + */ + num = b->size - write_offset; + + if (buf != NULL) + *buf = b->buf + write_offset; + assert(write_offset + num <= b->size); + + return num; +} static ossl_ssize_t bio_nwrite(BIO *bio, char **buf, size_t num_) - { - struct bio_bio_st *b; - ossl_ssize_t num, space; +{ + struct bio_bio_st *b; + ossl_ssize_t num, space; + + if (num_ > SSIZE_MAX) + num = SSIZE_MAX; + else + num = (ossl_ssize_t) num_; + + space = bio_nwrite0(bio, buf); + if (num > space) + num = space; + if (num <= 0) + return num; + b = bio->ptr; + assert(b != NULL); + b->len += num; + assert(b->len <= b->size); + + return num; +} - if (num_ > SSIZE_MAX) - num = SSIZE_MAX; - else - num = (ossl_ssize_t)num_; +static long bio_ctrl(BIO *bio, int cmd, long num, void *ptr) +{ + long ret; + struct bio_bio_st *b = bio->ptr; + + assert(b != NULL); + + switch (cmd) { + /* specific CTRL codes */ + + case BIO_C_SET_WRITE_BUF_SIZE: + if (b->peer) { + BIOerr(BIO_F_BIO_CTRL, BIO_R_IN_USE); + ret = 0; + } else if (num == 0) { + BIOerr(BIO_F_BIO_CTRL, BIO_R_INVALID_ARGUMENT); + ret = 0; + } else { + size_t new_size = num; + + if (b->size != new_size) { + if (b->buf) { + OPENSSL_free(b->buf); + b->buf = NULL; + } + b->size = new_size; + } + ret = 1; + } + break; + + case BIO_C_GET_WRITE_BUF_SIZE: + ret = (long)b->size; + break; + + case BIO_C_MAKE_BIO_PAIR: + { + BIO *other_bio = ptr; + + if (bio_make_pair(bio, other_bio)) + ret = 1; + else + ret = 0; + } + break; + + case BIO_C_DESTROY_BIO_PAIR: + /* + * Affects both BIOs in the pair -- call just once! Or let + * BIO_free(bio1); BIO_free(bio2); do the job. + */ + bio_destroy_pair(bio); + ret = 1; + break; + + case BIO_C_GET_WRITE_GUARANTEE: + /* + * How many bytes can the caller feed to the next write without + * having to keep any? + */ + if (b->peer == NULL || b->closed) + ret = 0; + else + ret = (long)b->size - b->len; + break; + + case BIO_C_GET_READ_REQUEST: + /* + * If the peer unsuccessfully tried to read, how many bytes were + * requested? (As with BIO_CTRL_PENDING, that number can usually be + * treated as boolean.) + */ + ret = (long)b->request; + break; + + case BIO_C_RESET_READ_REQUEST: + /* + * Reset request. (Can be useful after read attempts at the other + * side that are meant to be non-blocking, e.g. when probing SSL_read + * to see if any data is available.) + */ + b->request = 0; + ret = 1; + break; + + case BIO_C_SHUTDOWN_WR: + /* similar to shutdown(..., SHUT_WR) */ + b->closed = 1; + ret = 1; + break; + + case BIO_C_NREAD0: + /* prepare for non-copying read */ + ret = (long)bio_nread0(bio, ptr); + break; + + case BIO_C_NREAD: + /* non-copying read */ + ret = (long)bio_nread(bio, ptr, (size_t)num); + break; + + case BIO_C_NWRITE0: + /* prepare for non-copying write */ + ret = (long)bio_nwrite0(bio, ptr); + break; + + case BIO_C_NWRITE: + /* non-copying write */ + ret = (long)bio_nwrite(bio, ptr, (size_t)num); + break; + + /* standard CTRL codes follow */ + + case BIO_CTRL_RESET: + if (b->buf != NULL) { + b->len = 0; + b->offset = 0; + } + ret = 0; + break; + + case BIO_CTRL_GET_CLOSE: + ret = bio->shutdown; + break; + + case BIO_CTRL_SET_CLOSE: + bio->shutdown = (int)num; + ret = 1; + break; + + case BIO_CTRL_PENDING: + if (b->peer != NULL) { + struct bio_bio_st *peer_b = b->peer->ptr; + + ret = (long)peer_b->len; + } else + ret = 0; + break; + + case BIO_CTRL_WPENDING: + if (b->buf != NULL) + ret = (long)b->len; + else + ret = 0; + break; + + case BIO_CTRL_DUP: + /* See BIO_dup_chain for circumstances we have to expect. */ + { + BIO *other_bio = ptr; + struct bio_bio_st *other_b; + + assert(other_bio != NULL); + other_b = other_bio->ptr; + assert(other_b != NULL); + + assert(other_b->buf == NULL); /* other_bio is always fresh */ + + other_b->size = b->size; + } + + ret = 1; + break; + + case BIO_CTRL_FLUSH: + ret = 1; + break; + + case BIO_CTRL_EOF: + { + BIO *other_bio = ptr; + + if (other_bio) { + struct bio_bio_st *other_b = other_bio->ptr; + + assert(other_b != NULL); + ret = other_b->len == 0 && other_b->closed; + } else + ret = 1; + } + break; + + default: + ret = 0; + } + return ret; +} - space = bio_nwrite0(bio, buf); - if (num > space) - num = space; - if (num <= 0) - return num; - b = bio->ptr; - assert(b != NULL); - b->len += num; - assert(b->len <= b->size); +static int bio_puts(BIO *bio, const char *str) +{ + return bio_write(bio, str, strlen(str)); +} - return num; - } +static int bio_make_pair(BIO *bio1, BIO *bio2) +{ + struct bio_bio_st *b1, *b2; + + assert(bio1 != NULL); + assert(bio2 != NULL); + + b1 = bio1->ptr; + b2 = bio2->ptr; + + if (b1->peer != NULL || b2->peer != NULL) { + BIOerr(BIO_F_BIO_MAKE_PAIR, BIO_R_IN_USE); + return 0; + } + + if (b1->buf == NULL) { + b1->buf = OPENSSL_malloc(b1->size); + if (b1->buf == NULL) { + BIOerr(BIO_F_BIO_MAKE_PAIR, ERR_R_MALLOC_FAILURE); + return 0; + } + b1->len = 0; + b1->offset = 0; + } + + if (b2->buf == NULL) { + b2->buf = OPENSSL_malloc(b2->size); + if (b2->buf == NULL) { + BIOerr(BIO_F_BIO_MAKE_PAIR, ERR_R_MALLOC_FAILURE); + return 0; + } + b2->len = 0; + b2->offset = 0; + } + + b1->peer = bio2; + b1->closed = 0; + b1->request = 0; + b2->peer = bio1; + b2->closed = 0; + b2->request = 0; + + bio1->init = 1; + bio2->init = 1; + + return 1; +} +static void bio_destroy_pair(BIO *bio) +{ + struct bio_bio_st *b = bio->ptr; -static long bio_ctrl(BIO *bio, int cmd, long num, void *ptr) - { - long ret; - struct bio_bio_st *b = bio->ptr; - - assert(b != NULL); - - switch (cmd) - { - /* specific CTRL codes */ - - case BIO_C_SET_WRITE_BUF_SIZE: - if (b->peer) - { - BIOerr(BIO_F_BIO_CTRL, BIO_R_IN_USE); - ret = 0; - } - else if (num == 0) - { - BIOerr(BIO_F_BIO_CTRL, BIO_R_INVALID_ARGUMENT); - ret = 0; - } - else - { - size_t new_size = num; - - if (b->size != new_size) - { - if (b->buf) - { - OPENSSL_free(b->buf); - b->buf = NULL; - } - b->size = new_size; - } - ret = 1; - } - break; - - case BIO_C_GET_WRITE_BUF_SIZE: - ret = (long) b->size; - break; - - case BIO_C_MAKE_BIO_PAIR: - { - BIO *other_bio = ptr; - - if (bio_make_pair(bio, other_bio)) - ret = 1; - else - ret = 0; - } - break; - - case BIO_C_DESTROY_BIO_PAIR: - /* Affects both BIOs in the pair -- call just once! - * Or let BIO_free(bio1); BIO_free(bio2); do the job. */ - bio_destroy_pair(bio); - ret = 1; - break; - - case BIO_C_GET_WRITE_GUARANTEE: - /* How many bytes can the caller feed to the next write - * without having to keep any? */ - if (b->peer == NULL || b->closed) - ret = 0; - else - ret = (long) b->size - b->len; - break; - - case BIO_C_GET_READ_REQUEST: - /* If the peer unsuccessfully tried to read, how many bytes - * were requested? (As with BIO_CTRL_PENDING, that number - * can usually be treated as boolean.) */ - ret = (long) b->request; - break; - - case BIO_C_RESET_READ_REQUEST: - /* Reset request. (Can be useful after read attempts - * at the other side that are meant to be non-blocking, - * e.g. when probing SSL_read to see if any data is - * available.) */ - b->request = 0; - ret = 1; - break; - - case BIO_C_SHUTDOWN_WR: - /* similar to shutdown(..., SHUT_WR) */ - b->closed = 1; - ret = 1; - break; - - case BIO_C_NREAD0: - /* prepare for non-copying read */ - ret = (long) bio_nread0(bio, ptr); - break; - - case BIO_C_NREAD: - /* non-copying read */ - ret = (long) bio_nread(bio, ptr, (size_t) num); - break; - - case BIO_C_NWRITE0: - /* prepare for non-copying write */ - ret = (long) bio_nwrite0(bio, ptr); - break; - - case BIO_C_NWRITE: - /* non-copying write */ - ret = (long) bio_nwrite(bio, ptr, (size_t) num); - break; - - - /* standard CTRL codes follow */ - - case BIO_CTRL_RESET: - if (b->buf != NULL) - { - b->len = 0; - b->offset = 0; - } - ret = 0; - break; - - case BIO_CTRL_GET_CLOSE: - ret = bio->shutdown; - break; - - case BIO_CTRL_SET_CLOSE: - bio->shutdown = (int) num; - ret = 1; - break; - - case BIO_CTRL_PENDING: - if (b->peer != NULL) - { - struct bio_bio_st *peer_b = b->peer->ptr; - - ret = (long) peer_b->len; - } - else - ret = 0; - break; - - case BIO_CTRL_WPENDING: - if (b->buf != NULL) - ret = (long) b->len; - else - ret = 0; - break; - - case BIO_CTRL_DUP: - /* See BIO_dup_chain for circumstances we have to expect. */ - { - BIO *other_bio = ptr; - struct bio_bio_st *other_b; - - assert(other_bio != NULL); - other_b = other_bio->ptr; - assert(other_b != NULL); - - assert(other_b->buf == NULL); /* other_bio is always fresh */ - - other_b->size = b->size; - } - - ret = 1; - break; - - case BIO_CTRL_FLUSH: - ret = 1; - break; - - case BIO_CTRL_EOF: - { - BIO *other_bio = ptr; - - if (other_bio) - { - struct bio_bio_st *other_b = other_bio->ptr; - - assert(other_b != NULL); - ret = other_b->len == 0 && other_b->closed; - } - else - ret = 1; - } - break; - - default: - ret = 0; - } - return ret; - } + if (b != NULL) { + BIO *peer_bio = b->peer; -static int bio_puts(BIO *bio, const char *str) - { - return bio_write(bio, str, strlen(str)); - } + if (peer_bio != NULL) { + struct bio_bio_st *peer_b = peer_bio->ptr; + assert(peer_b != NULL); + assert(peer_b->peer == bio); -static int bio_make_pair(BIO *bio1, BIO *bio2) - { - struct bio_bio_st *b1, *b2; - - assert(bio1 != NULL); - assert(bio2 != NULL); - - b1 = bio1->ptr; - b2 = bio2->ptr; - - if (b1->peer != NULL || b2->peer != NULL) - { - BIOerr(BIO_F_BIO_MAKE_PAIR, BIO_R_IN_USE); - return 0; - } - - if (b1->buf == NULL) - { - b1->buf = OPENSSL_malloc(b1->size); - if (b1->buf == NULL) - { - BIOerr(BIO_F_BIO_MAKE_PAIR, ERR_R_MALLOC_FAILURE); - return 0; - } - b1->len = 0; - b1->offset = 0; - } - - if (b2->buf == NULL) - { - b2->buf = OPENSSL_malloc(b2->size); - if (b2->buf == NULL) - { - BIOerr(BIO_F_BIO_MAKE_PAIR, ERR_R_MALLOC_FAILURE); - return 0; - } - b2->len = 0; - b2->offset = 0; - } - - b1->peer = bio2; - b1->closed = 0; - b1->request = 0; - b2->peer = bio1; - b2->closed = 0; - b2->request = 0; - - bio1->init = 1; - bio2->init = 1; - - return 1; - } + peer_b->peer = NULL; + peer_bio->init = 0; + assert(peer_b->buf != NULL); + peer_b->len = 0; + peer_b->offset = 0; -static void bio_destroy_pair(BIO *bio) - { - struct bio_bio_st *b = bio->ptr; - - if (b != NULL) - { - BIO *peer_bio = b->peer; - - if (peer_bio != NULL) - { - struct bio_bio_st *peer_b = peer_bio->ptr; - - assert(peer_b != NULL); - assert(peer_b->peer == bio); - - peer_b->peer = NULL; - peer_bio->init = 0; - assert(peer_b->buf != NULL); - peer_b->len = 0; - peer_b->offset = 0; - - b->peer = NULL; - bio->init = 0; - assert(b->buf != NULL); - b->len = 0; - b->offset = 0; - } - } - } - + b->peer = NULL; + bio->init = 0; + assert(b->buf != NULL); + b->len = 0; + b->offset = 0; + } + } +} /* Exported convenience functions */ int BIO_new_bio_pair(BIO **bio1_p, size_t writebuf1, - BIO **bio2_p, size_t writebuf2) - { - BIO *bio1 = NULL, *bio2 = NULL; - long r; - int ret = 0; - - bio1 = BIO_new(BIO_s_bio()); - if (bio1 == NULL) - goto err; - bio2 = BIO_new(BIO_s_bio()); - if (bio2 == NULL) - goto err; - - if (writebuf1) - { - r = BIO_set_write_buf_size(bio1, writebuf1); - if (!r) - goto err; - } - if (writebuf2) - { - r = BIO_set_write_buf_size(bio2, writebuf2); - if (!r) - goto err; - } - - r = BIO_make_bio_pair(bio1, bio2); - if (!r) - goto err; - ret = 1; + BIO **bio2_p, size_t writebuf2) +{ + BIO *bio1 = NULL, *bio2 = NULL; + long r; + int ret = 0; + + bio1 = BIO_new(BIO_s_bio()); + if (bio1 == NULL) + goto err; + bio2 = BIO_new(BIO_s_bio()); + if (bio2 == NULL) + goto err; + + if (writebuf1) { + r = BIO_set_write_buf_size(bio1, writebuf1); + if (!r) + goto err; + } + if (writebuf2) { + r = BIO_set_write_buf_size(bio2, writebuf2); + if (!r) + goto err; + } + + r = BIO_make_bio_pair(bio1, bio2); + if (!r) + goto err; + ret = 1; err: - if (ret == 0) - { - if (bio1) - { - BIO_free(bio1); - bio1 = NULL; - } - if (bio2) - { - BIO_free(bio2); - bio2 = NULL; - } - } - - *bio1_p = bio1; - *bio2_p = bio2; - return ret; - } + if (ret == 0) { + if (bio1) { + BIO_free(bio1); + bio1 = NULL; + } + if (bio2) { + BIO_free(bio2); + bio2 = NULL; + } + } + + *bio1_p = bio1; + *bio2_p = bio2; + return ret; +} size_t BIO_ctrl_get_write_guarantee(BIO *bio) - { - return BIO_ctrl(bio, BIO_C_GET_WRITE_GUARANTEE, 0, NULL); - } +{ + return BIO_ctrl(bio, BIO_C_GET_WRITE_GUARANTEE, 0, NULL); +} size_t BIO_ctrl_get_read_request(BIO *bio) - { - return BIO_ctrl(bio, BIO_C_GET_READ_REQUEST, 0, NULL); - } +{ + return BIO_ctrl(bio, BIO_C_GET_READ_REQUEST, 0, NULL); +} int BIO_ctrl_reset_read_request(BIO *bio) - { - return (BIO_ctrl(bio, BIO_C_RESET_READ_REQUEST, 0, NULL) != 0); - } - +{ + return (BIO_ctrl(bio, BIO_C_RESET_READ_REQUEST, 0, NULL) != 0); +} -/* BIO_nread0/nread/nwrite0/nwrite are available only for BIO pairs for now - * (conceivably some other BIOs could allow non-copying reads and writes too.) +/* + * BIO_nread0/nread/nwrite0/nwrite are available only for BIO pairs for now + * (conceivably some other BIOs could allow non-copying reads and writes + * too.) */ int BIO_nread0(BIO *bio, char **buf) - { - long ret; - - if (!bio->init) - { - BIOerr(BIO_F_BIO_NREAD0, BIO_R_UNINITIALIZED); - return -2; - } - - ret = BIO_ctrl(bio, BIO_C_NREAD0, 0, buf); - if (ret > INT_MAX) - return INT_MAX; - else - return (int) ret; - } +{ + long ret; + + if (!bio->init) { + BIOerr(BIO_F_BIO_NREAD0, BIO_R_UNINITIALIZED); + return -2; + } + + ret = BIO_ctrl(bio, BIO_C_NREAD0, 0, buf); + if (ret > INT_MAX) + return INT_MAX; + else + return (int)ret; +} int BIO_nread(BIO *bio, char **buf, int num) - { - int ret; +{ + int ret; - if (!bio->init) - { - BIOerr(BIO_F_BIO_NREAD, BIO_R_UNINITIALIZED); - return -2; - } + if (!bio->init) { + BIOerr(BIO_F_BIO_NREAD, BIO_R_UNINITIALIZED); + return -2; + } - ret = (int) BIO_ctrl(bio, BIO_C_NREAD, num, buf); - if (ret > 0) - bio->num_read += ret; - return ret; - } + ret = (int)BIO_ctrl(bio, BIO_C_NREAD, num, buf); + if (ret > 0) + bio->num_read += ret; + return ret; +} int BIO_nwrite0(BIO *bio, char **buf) - { - long ret; - - if (!bio->init) - { - BIOerr(BIO_F_BIO_NWRITE0, BIO_R_UNINITIALIZED); - return -2; - } - - ret = BIO_ctrl(bio, BIO_C_NWRITE0, 0, buf); - if (ret > INT_MAX) - return INT_MAX; - else - return (int) ret; - } +{ + long ret; + + if (!bio->init) { + BIOerr(BIO_F_BIO_NWRITE0, BIO_R_UNINITIALIZED); + return -2; + } + + ret = BIO_ctrl(bio, BIO_C_NWRITE0, 0, buf); + if (ret > INT_MAX) + return INT_MAX; + else + return (int)ret; +} int BIO_nwrite(BIO *bio, char **buf, int num) - { - int ret; - - if (!bio->init) - { - BIOerr(BIO_F_BIO_NWRITE, BIO_R_UNINITIALIZED); - return -2; - } - - ret = BIO_ctrl(bio, BIO_C_NWRITE, num, buf); - if (ret > 0) - bio->num_write += ret; - return ret; - } +{ + int ret; + + if (!bio->init) { + BIOerr(BIO_F_BIO_NWRITE, BIO_R_UNINITIALIZED); + return -2; + } + + ret = BIO_ctrl(bio, BIO_C_NWRITE, num, buf); + if (ret > 0) + bio->num_write += ret; + return ret; +} |