/* crypto/bio/bio_lib.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * 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 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 acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS 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 AUTHOR OR 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. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include #include #include #include "cryptlib.h" #include #include BIO *BIO_new(BIO_METHOD *method) { BIO *ret=NULL; ret=(BIO *)OPENSSL_malloc(sizeof(BIO)); if (ret == NULL) { BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE); return(NULL); } if (!BIO_set(ret,method)) { OPENSSL_free(ret); ret=NULL; } return(ret); } int BIO_set(BIO *bio, BIO_METHOD *method) { bio->method=method; bio->callback=NULL; bio->cb_arg=NULL; bio->init=0; bio->shutdown=1; bio->flags=0; bio->retry_reason=0; bio->num=0; bio->ptr=NULL; bio->prev_bio=NULL; bio->next_bio=NULL; bio->references=1; bio->num_read=0L; bio->num_write=0L; CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data); if (method->create != NULL) if (!method->create(bio)) { CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data); return(0); } return(1); } int BIO_free(BIO *a) { int ret=0,i; if (a == NULL) return(0); i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO); #ifdef REF_PRINT REF_PRINT("BIO",a); #endif if (i > 0) return(1); #ifdef REF_CHECK if (i < 0) { fprintf(stderr,"BIO_free, bad reference count\n"); abort(); } #endif if ((a->callback != NULL) && ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0)) return(i); CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data); if ((a->method == NULL) || (a->method->destroy == NULL)) return(1); ret=a->method->destroy(a); OPENSSL_free(a); return(1); } void BIO_vfree(BIO *a) { BIO_free(a); } int BIO_read(BIO *b, void *out, int outl) { int i; long (*cb)(); if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) { BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD); return(-2); } cb=b->callback; if ((cb != NULL) && ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0)) return(i); if (!b->init) { BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED); return(-2); } i=b->method->bread(b,out,outl); if (i > 0) b->num_read+=(unsigned long)i; if (cb != NULL) i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl, 0L,(long)i); return(i); } int BIO_write(BIO *b, const void *in, int inl) { int i; long (*cb)(); if (b == NULL) return(0); cb=b->callback; if ((b->method == NULL) || (b->method->bwrite == NULL)) { BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD); return(-2); } if ((cb != NULL) && ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0)) return(i); if (!b->init) { BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED); return(-2); } i=b->method->bwrite(b,in,inl); if (i > 0) b->num_write+=(unsigned long)i; if (cb != NULL) i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl, 0L,(long)i); return(i); } int BIO_puts(BIO *b, const char *in) { int i; long (*cb)(); if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) { BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD); return(-2); } cb=b->callback; if ((cb != NULL) && ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0)) return(i); if (!b->init) { BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED); return(-2); } i=b->method->bputs(b,in); if (i > 0) b->num_write+=(unsigned long)i; if (cb != NULL) i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0, 0L,(long)i); return(i); } int BIO_gets(BIO *b, char *in, int inl) { int i; long (*cb)(); if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) { BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD); return(-2); } cb=b->callback; if ((cb != NULL) && ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0)) return(i); if (!b->init) { BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED); return(-2); } i=b->method->bgets(b,in,inl); if (cb != NULL) i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl, 0L,(long)i); return(i); } int BIO_indent(BIO *b,int indent,int max) { if(indent < 0) indent=0; if(indent > max) indent=max; while(indent--) if(BIO_puts(b," ") != 1) return 0; return 1; } long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg) { int i; i=iarg; return(BIO_ctrl(b,cmd,larg,(char *)&i)); } char *BIO_ptr_ctrl(BIO *b, int cmd, long larg) { char *p=NULL; if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0) return(NULL); else return(p); } long BIO_ctrl(BIO *b, int cmd, long larg, void *parg) { long ret; long (*cb)(); if (b == NULL) return(0); if ((b->method == NULL) || (b->method->ctrl == NULL)) { BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD); return(-2); } cb=b->callback; if ((cb != NULL) && ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0)) return(ret); ret=b->method->ctrl(b,cmd,larg,parg); if (cb != NULL) ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd, larg,ret); return(ret); } long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long)) { long ret; long (*cb)(); if (b == NULL) return(0); if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) { BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD); return(-2); } cb=b->callback; if ((cb != NULL) && ((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0)) return(ret); ret=b->method->callback_ctrl(b,cmd,fp); if (cb != NULL) ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd, 0,ret); return(ret); } /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros * do; but those macros have inappropriate return type, and for interfacing * from other programming languages, C macros aren't much of a help anyway. */ size_t BIO_ctrl_pending(BIO *bio) { return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL); } size_t BIO_ctrl_wpending(BIO *bio) { return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL); } /* put the 'bio' on the end of b's list of operators */ BIO *BIO_push(BIO *b, BIO *bio) { BIO *lb; if (b == NULL) return(bio); lb=b; while (lb->next_bio != NULL) lb=lb->next_bio; lb->next_bio=bio; if (bio != NULL) bio->prev_bio=lb; /* called to do internal processing */ BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL); return(b); } /* Remove the first and return the rest */ BIO *BIO_pop(BIO *b) { BIO *ret; if (b == NULL) return(NULL); ret=b->next_bio; if (b->prev_bio != NULL) b->prev_bio->next_bio=b->next_bio; if (b->next_bio != NULL) b->next_bio->prev_bio=b->prev_bio; b->next_bio=NULL; b->prev_bio=NULL; BIO_ctrl(b,BIO_CTRL_POP,0,NULL); return(ret); } BIO *BIO_get_retry_BIO(BIO *bio, int *reason) { BIO *b,*last; b=last=bio; for (;;) { if (!BIO_should_retry(b)) break; last=b; b=b->next_bio; if (b == NULL) break; } if (reason != NULL) *reason=last->retry_reason; return(last); } int BIO_get_retry_reason(BIO *bio) { return(bio->retry_reason); } BIO *BIO_find_type(BIO *bio, int type) { int mt,mask; if(!bio) return NULL; mask=type&0xff; do { if (bio->method != NULL) { mt=bio->method->type; if (!mask) { if (mt & type) return(bio); } else if (mt == type) return(bio); } bio=bio->next_bio; } while (bio != NULL); return(NULL); } BIO *BIO_next(BIO *b) { if(!b) return NULL; return b->next_bio; } void BIO_free_all(BIO *bio) { BIO *b; int ref; while (bio != NULL) { b=bio; ref=b->references; bio=bio->next_bio; BIO_free(b); /* Since ref count > 1, don't free anyone else. */ if (ref > 1) break; } } BIO *BIO_dup_chain(BIO *in) { BIO *ret=NULL,*eoc=NULL,*bio,*new; for (bio=in; bio != NULL; bio=bio->next_bio) { if ((new=BIO_new(bio->method)) == NULL) goto err; new->callback=bio->callback; new->cb_arg=bio->cb_arg; new->init=bio->init; new->shutdown=bio->shutdown; new->flags=bio->flags; /* This will let SSL_s_sock() work with stdin/stdout */ new->num=bio->num; if (!BIO_dup_state(bio,(char *)new)) { BIO_free(new); goto err; } /* copy app data */ if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new->ex_data, &bio->ex_data)) goto err; if (ret == NULL) { eoc=new; ret=eoc; } else { BIO_push(eoc,new); eoc=new; } } return(ret); err: if (ret != NULL) BIO_free(ret); return(NULL); } void BIO_copy_next_retry(BIO *b) { BIO_set_flags(b,BIO_get_retry_flags(b->next_bio)); b->retry_reason=b->next_bio->retry_reason; } int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) { return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp, new_func, dup_func, free_func); } int BIO_set_ex_data(BIO *bio, int idx, void *data) { return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data)); } void *BIO_get_ex_data(BIO *bio, int idx) { return(CRYPTO_get_ex_data(&(bio->ex_data),idx)); } unsigned long BIO_number_read(BIO *bio) { if(bio) return bio->num_read; return 0; } unsigned long BIO_number_written(BIO *bio) { if(bio) return bio->num_write; return 0; } IMPLEMENT_STACK_OF(BIO)