Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/813#discussion_r86404383
--- Diff: core/sql/exp/exp_function.cpp ---
@@ -7900,6 +7936,114 @@ ex_expr::exp_return_type
ExFunctionInetNtoa::eval(char * op_data[],
return ex_expr::EXPR_OK;
}
+ex_expr::exp_return_type ExFunctionCrc32::eval(char * op_data[],
+ CollHeap *heap,
+ ComDiagsArea
**diags)
+{
+ Attributes *resultAttr = getOperand(0);
+ Attributes *srcAttr = getOperand(1);
+
+ Lng32 slen = srcAttr->getLength(op_data[-MAX_OPERANDS+1]);
+ Lng32 rlen = resultAttr->getLength();
+
+ *(ULng32*)op_data[0] = 0;
+ ULng32 crc = crc32(0L, Z_NULL, 0);
+ crc = crc32 (crc, (const Bytef*)op_data[1], slen);
+ *(ULng32*)op_data[0] = crc;
+ return ex_expr::EXPR_OK;
+}
+
+//only support SHA 256 for this version
+//TBD: add 224 and 384, 512 in next version
+ex_expr::exp_return_type ExFunctionSha2::eval(char * op_data[],
+ CollHeap *heap,
+ ComDiagsArea
**diags)
+{
+
+ unsigned char sha[SHA256_DIGEST_LENGTH+ 1]={0};
+
+ Attributes *resultAttr = getOperand(0);
+ Attributes *srcAttr = getOperand(1);
+
+ Lng32 slen = srcAttr->getLength(op_data[-MAX_OPERANDS+1]);
+ Lng32 rlen = resultAttr->getLength();
+
+ memset(op_data[0], 0, rlen);
+
+ SHA256_CTX sha_ctx;
+
+ SHA256_Init(&sha_ctx);
+ SHA256_Update(&sha_ctx, op_data[1], slen);
+ SHA256_Final((unsigned char*) sha,&sha_ctx);
+ char tmp[2];
+ for(int i=0; i < SHA256_DIGEST_LENGTH; i++ )
+ {
+ tmp[0]=tmp[1]='0';
+ sprintf(tmp, "%.2x", (int)sha[i]);
+ memcpy(op_data[0]+i*2, tmp, 2);
+ }
+
+ return ex_expr::EXPR_OK;
+}
+
+ex_expr::exp_return_type ExFunctionSha::eval(char * op_data[],
+ CollHeap *heap,
+ ComDiagsArea
**diags)
+{
+
+ unsigned char sha[SHA_DIGEST_LENGTH + 1]={0};
+
+ Attributes *resultAttr = getOperand(0);
+ Attributes *srcAttr = getOperand(1);
+ Lng32 slen = srcAttr->getLength(op_data[-MAX_OPERANDS+1]);
+ Lng32 rlen = resultAttr->getLength();
+ memset(op_data[0], 0, rlen);
+
+ SHA_CTX sha_ctx;
+
+ SHA1_Init(&sha_ctx);
+ SHA1_Update(&sha_ctx, op_data[1], slen);
+ SHA1_Final((unsigned char*) sha,&sha_ctx);
+ char tmp[2];
--- End diff --
This buffer is too short.
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