1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <openssl/objects.h> 5 #include <openssl/comp.h> 6 7 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth) 8 { 9 COMP_CTX *ret; 10 11 if ((ret=(COMP_CTX *)OPENSSL_malloc(sizeof(COMP_CTX))) == NULL) 12 { 13 /* ZZZZZZZZZZZZZZZZ */ 14 return(NULL); 15 } 16 memset(ret,0,sizeof(COMP_CTX)); 17 ret->meth=meth; 18 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) 19 { 20 OPENSSL_free(ret); 21 ret=NULL; 22 } 23 return(ret); 24 } 25 26 void COMP_CTX_free(COMP_CTX *ctx) 27 { 28 if(ctx == NULL) 29 return; 30 31 if (ctx->meth->finish != NULL) 32 ctx->meth->finish(ctx); 33 34 OPENSSL_free(ctx); 35 } 36 37 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen, 38 unsigned char *in, int ilen) 39 { 40 int ret; 41 if (ctx->meth->compress == NULL) 42 { 43 /* ZZZZZZZZZZZZZZZZZ */ 44 return(-1); 45 } 46 ret=ctx->meth->compress(ctx,out,olen,in,ilen); 47 if (ret > 0) 48 { 49 ctx->compress_in+=ilen; 50 ctx->compress_out+=ret; 51 } 52 return(ret); 53 } 54 55 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen, 56 unsigned char *in, int ilen) 57 { 58 int ret; 59 60 if (ctx->meth->expand == NULL) 61 { 62 /* ZZZZZZZZZZZZZZZZZ */ 63 return(-1); 64 } 65 ret=ctx->meth->expand(ctx,out,olen,in,ilen); 66 if (ret > 0) 67 { 68 ctx->expand_in+=ilen; 69 ctx->expand_out+=ret; 70 } 71 return(ret); 72 } 73
