From Newsgroup: comp.sys.tandem

On Wednesday, February 24, 2021 at 10:59:44 AM UTC+5:30, s4n...@gmail.com wrote:

On Saturday, February 13, 2021 at 4:21:56 AM UTC+8, ssrin...@gmail.com wrote:

Hi,

I am having a ".TXT" file and I have generated SHA hash of ".TXT" file using Windows Command prompt like below

C:\temp>certutil -hashfile test.txt sha256
SHA256 hash of test.txt: 7d967bad44f719f3733bbec0f1228f0247794096a434d57e6875f3367ead5f33
CertUtil: -hashfile command completed successfully. =============================================================
Now, If I upload the same ".TXT" file to Tandem . How to generate a SHA256 key so that I can compare the key generated from Tandem to the key which I already generated using Windows Command prompt (Certutil)
I am planning to use COBOL programming. Is there any routine which we can call from cobol ?
any help would be appreciated.

I was created SHA3-512 using Java and run under pathway server:

.properties
-----------------

# Type for algorithm
# sha3-224
# sha3-256
# sha3-384
# sha3-512
sha3.algorithm=sha3-512
sha3.uppercase=N
sha3.cutover=2200
sha3.trace=off ---------------------------------------------------------------------------------------

protected String calculateSHA3( String filename, EnscribeFile ef ) {

I_Data iData = new I_Data();
Sha3 sha3 = null;
EnscribeOpenOptions opt = new EnscribeOpenOptions();
String result = null;
StringBuilder sb = new StringBuilder();
String lf = "";
String cr = "";

if (MyProperties.isTrace()) {
logger.info(String.format("Trace on: Filename: %s", filename));
}

switch (MyProperties.getAlgorithm().toUpperCase()) {
case "SHA3-224":
sha3 = new Sha3(Type.SHA3_224);
break;
case "SHA3-256":
sha3 = new Sha3(Type.SHA3_256);
break;
case "SHA3-384":
sha3 = new Sha3(Type.SHA3_384);
break;
case "SHA3-512":
sha3 = new Sha3(Type.SHA3_512);
break;
default:
sha3 = new Sha3(Type.SHA3_512);
break;
}

opt.setAccess(EnscribeOpenOptions.READ_ONLY); opt.setExclusion(EnscribeOpenOptions.SHARED);

try {
ef.open( opt );

if ( ef.getFileInfo().getFileType() != 0) {
if (MyProperties.isCrChar())
{
cr = "\r";
}

iData.set_bufferLen(ef.getFileInfo().getRecordLength());
lf = "\n";
}
else
{
/*
* For unstructured data, we need to use buffer as 1024 bytes to read the data
*/
opt.setUnstructuredAccess(true);
opt.setSequentialBlockBufferLength(1024);
}

int countread = 0;
do {
try {
countread = ef.read(iData);
if ( countread != -1 ) {
sb.append(iData.getSdata());
sb.append(cr).append(lf);
}
} catch (DataConversionException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
}

} while (countread != -1);

/*
* Compute SHA3
*/

result = HexTools.convertToHex(sha3.encode( sb.toString().getBytes(StandardCharsets.UTF_8)));

if (MyProperties.isUppercase())
{
result = result.toUpperCase();
}
else
{
result = result.toLowerCase();
}
} catch (EnscribeFileException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
} finally {
ef.close();
sb.setLength(0);
}

return result;

}

Could anybody help on this ? i want to generate hash from file using SHA3-256 algorithm in vb.net, pls anybody help to get sample code or any idea on this.
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.tandem

On Wednesday, October 12, 2022 at 3:28:03 a.m. UTC-4, aravind...@gmail.com wrote:

On Wednesday, February 24, 2021 at 10:59:44 AM UTC+5:30, s4n...@gmail.com wrote:

On Saturday, February 13, 2021 at 4:21:56 AM UTC+8, ssrin...@gmail.com wrote:

Hi,

I am having a ".TXT" file and I have generated SHA hash of ".TXT" file using Windows Command prompt like below

C:\temp>certutil -hashfile test.txt sha256
SHA256 hash of test.txt: 7d967bad44f719f3733bbec0f1228f0247794096a434d57e6875f3367ead5f33 CertUtil: -hashfile command completed successfully. =============================================================
Now, If I upload the same ".TXT" file to Tandem . How to generate a SHA256 key so that I can compare the key generated from Tandem to the key which I already generated using Windows Command prompt (Certutil)
I am planning to use COBOL programming. Is there any routine which we can call from cobol ?
any help would be appreciated.

I was created SHA3-512 using Java and run under pathway server:

.properties
-----------------

# Type for algorithm
# sha3-224
# sha3-256
# sha3-384
# sha3-512
sha3.algorithm=sha3-512
sha3.uppercase=N
sha3.cutover=2200
sha3.trace=off ---------------------------------------------------------------------------------------

protected String calculateSHA3( String filename, EnscribeFile ef ) {

I_Data iData = new I_Data();
Sha3 sha3 = null;
EnscribeOpenOptions opt = new EnscribeOpenOptions();
String result = null;
StringBuilder sb = new StringBuilder();
String lf = "";
String cr = "";

if (MyProperties.isTrace()) {
logger.info(String.format("Trace on: Filename: %s", filename));
}

switch (MyProperties.getAlgorithm().toUpperCase()) {
case "SHA3-224":
sha3 = new Sha3(Type.SHA3_224);
break;
case "SHA3-256":
sha3 = new Sha3(Type.SHA3_256);
break;
case "SHA3-384":
sha3 = new Sha3(Type.SHA3_384);
break;
case "SHA3-512":
sha3 = new Sha3(Type.SHA3_512);
break;
default:
sha3 = new Sha3(Type.SHA3_512);
break;
}

opt.setAccess(EnscribeOpenOptions.READ_ONLY); opt.setExclusion(EnscribeOpenOptions.SHARED);

try {
ef.open( opt );

if ( ef.getFileInfo().getFileType() != 0) {
if (MyProperties.isCrChar())
{
cr = "\r";
}

iData.set_bufferLen(ef.getFileInfo().getRecordLength());
lf = "\n";
}
else
{
/*
* For unstructured data, we need to use buffer as 1024 bytes to read the data
*/
opt.setUnstructuredAccess(true);
opt.setSequentialBlockBufferLength(1024);
}

int countread = 0;
do {
try {
countread = ef.read(iData);
if ( countread != -1 ) {
sb.append(iData.getSdata());
sb.append(cr).append(lf);
}
} catch (DataConversionException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
}

} while (countread != -1);

/*
* Compute SHA3
*/

result = HexTools.convertToHex(sha3.encode( sb.toString().getBytes(StandardCharsets.UTF_8)));

if (MyProperties.isUppercase())
{
result = result.toUpperCase();
}
else
{
result = result.toLowerCase();
}
} catch (EnscribeFileException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
} finally {
ef.close();
sb.setLength(0);
}

return result;

}

Could anybody help on this ? i want to generate hash from file using SHA3-256 algorithm in vb.net, pls anybody help to get sample code or any idea on this.

Googling this, you could potentially use https://github.com/brainhub/SHA3IUF or some other Open Source library, but that assumes your organization can take and use code from GitHub. Or develop your own SHA3 code - it is not that hard to do and well documented.
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.tandem

On Wednesday, October 12, 2022 at 6:09:42 PM UTC+2, Randall wrote:

On Wednesday, October 12, 2022 at 3:28:03 a.m. UTC-4, aravind...@gmail.com wrote:

On Wednesday, February 24, 2021 at 10:59:44 AM UTC+5:30, s4n...@gmail.com wrote:

On Saturday, February 13, 2021 at 4:21:56 AM UTC+8, ssrin...@gmail.com wrote:

Hi,

I am having a ".TXT" file and I have generated SHA hash of ".TXT" file using Windows Command prompt like below

C:\temp>certutil -hashfile test.txt sha256
SHA256 hash of test.txt: 7d967bad44f719f3733bbec0f1228f0247794096a434d57e6875f3367ead5f33 CertUtil: -hashfile command completed successfully. =============================================================
Now, If I upload the same ".TXT" file to Tandem . How to generate a SHA256 key so that I can compare the key generated from Tandem to the key which I already generated using Windows Command prompt (Certutil)
I am planning to use COBOL programming. Is there any routine which we can call from cobol ?
any help would be appreciated.

I was created SHA3-512 using Java and run under pathway server:

.properties
-----------------

# Type for algorithm
# sha3-224
# sha3-256
# sha3-384
# sha3-512
sha3.algorithm=sha3-512
sha3.uppercase=N
sha3.cutover=2200
sha3.trace=off ---------------------------------------------------------------------------------------

protected String calculateSHA3( String filename, EnscribeFile ef ) {

I_Data iData = new I_Data();
Sha3 sha3 = null;
EnscribeOpenOptions opt = new EnscribeOpenOptions();
String result = null;
StringBuilder sb = new StringBuilder();
String lf = "";
String cr = "";

if (MyProperties.isTrace()) {
logger.info(String.format("Trace on: Filename: %s", filename));
}

switch (MyProperties.getAlgorithm().toUpperCase()) {
case "SHA3-224":
sha3 = new Sha3(Type.SHA3_224);
break;
case "SHA3-256":
sha3 = new Sha3(Type.SHA3_256);
break;
case "SHA3-384":
sha3 = new Sha3(Type.SHA3_384);
break;
case "SHA3-512":
sha3 = new Sha3(Type.SHA3_512);
break;
default:
sha3 = new Sha3(Type.SHA3_512);
break;
}

opt.setAccess(EnscribeOpenOptions.READ_ONLY); opt.setExclusion(EnscribeOpenOptions.SHARED);

try {
ef.open( opt );

if ( ef.getFileInfo().getFileType() != 0) {
if (MyProperties.isCrChar())
{
cr = "\r";
}

iData.set_bufferLen(ef.getFileInfo().getRecordLength());
lf = "\n";
}
else
{
/*
* For unstructured data, we need to use buffer as 1024 bytes to read the data
*/
opt.setUnstructuredAccess(true); opt.setSequentialBlockBufferLength(1024);
}

int countread = 0;
do {
try {
countread = ef.read(iData);
if ( countread != -1 ) {
sb.append(iData.getSdata());
sb.append(cr).append(lf);
}
} catch (DataConversionException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
}

} while (countread != -1);

/*
* Compute SHA3
*/

result = HexTools.convertToHex(sha3.encode( sb.toString().getBytes(StandardCharsets.UTF_8)));

if (MyProperties.isUppercase())
{
result = result.toUpperCase();
}
else
{
result = result.toLowerCase();
}
} catch (EnscribeFileException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
} finally {
ef.close();
sb.setLength(0);
}

return result;

}

Could anybody help on this ? i want to generate hash from file using SHA3-256 algorithm in vb.net, pls anybody help to get sample code or any idea on this.

Googling this, you could potentially use https://github.com/brainhub/SHA3IUF or some other Open Source library, but that assumes your organization can take and use code from GitHub. Or develop your own SHA3 code - it is not that hard to do and well documented.

I'm a bit interested in this topic due to the fact that we have a MD5 implementation which we need to replace. Haven't gotten to actually do it yet but when I did some research I found a very well structured library called Nettle which has the following punch line "Nettle is a low-level cryptographic library that is designed to fit easily in more or less any context.".
You'll find it here: https://git.lysator.liu.se/nettle/nettle
Please report back if you're successful and tell us how you solved it!
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.tandem

On Thursday, October 13, 2022 at 5:57:09 a.m. UTC-4, Christoffer Lund wrote:

On Wednesday, October 12, 2022 at 6:09:42 PM UTC+2, Randall wrote:

On Wednesday, October 12, 2022 at 3:28:03 a.m. UTC-4, aravind...@gmail.com wrote:

On Wednesday, February 24, 2021 at 10:59:44 AM UTC+5:30, s4n...@gmail.com wrote:

On Saturday, February 13, 2021 at 4:21:56 AM UTC+8, ssrin...@gmail.com wrote:

Hi,

I am having a ".TXT" file and I have generated SHA hash of ".TXT" file using Windows Command prompt like below

C:\temp>certutil -hashfile test.txt sha256
SHA256 hash of test.txt: 7d967bad44f719f3733bbec0f1228f0247794096a434d57e6875f3367ead5f33 CertUtil: -hashfile command completed successfully. =============================================================
Now, If I upload the same ".TXT" file to Tandem . How to generate a SHA256 key so that I can compare the key generated from Tandem to the key which I already generated using Windows Command prompt (Certutil)
I am planning to use COBOL programming. Is there any routine which we can call from cobol ?
any help would be appreciated.

I was created SHA3-512 using Java and run under pathway server:

.properties
-----------------

# Type for algorithm
# sha3-224
# sha3-256
# sha3-384
# sha3-512
sha3.algorithm=sha3-512
sha3.uppercase=N
sha3.cutover=2200
sha3.trace=off ---------------------------------------------------------------------------------------

protected String calculateSHA3( String filename, EnscribeFile ef ) {

I_Data iData = new I_Data();
Sha3 sha3 = null;
EnscribeOpenOptions opt = new EnscribeOpenOptions();
String result = null;
StringBuilder sb = new StringBuilder();
String lf = "";
String cr = "";

if (MyProperties.isTrace()) {
logger.info(String.format("Trace on: Filename: %s", filename));
}

switch (MyProperties.getAlgorithm().toUpperCase()) {
case "SHA3-224":
sha3 = new Sha3(Type.SHA3_224);
break;
case "SHA3-256":
sha3 = new Sha3(Type.SHA3_256);
break;
case "SHA3-384":
sha3 = new Sha3(Type.SHA3_384);
break;
case "SHA3-512":
sha3 = new Sha3(Type.SHA3_512);
break;
default:
sha3 = new Sha3(Type.SHA3_512);
break;
}

opt.setAccess(EnscribeOpenOptions.READ_ONLY); opt.setExclusion(EnscribeOpenOptions.SHARED);

try {
ef.open( opt );

if ( ef.getFileInfo().getFileType() != 0) {
if (MyProperties.isCrChar())
{
cr = "\r";
}

iData.set_bufferLen(ef.getFileInfo().getRecordLength());
lf = "\n";
}
else
{
/*
* For unstructured data, we need to use buffer as 1024 bytes to read the data
*/
opt.setUnstructuredAccess(true); opt.setSequentialBlockBufferLength(1024);
}

int countread = 0;
do {
try {
countread = ef.read(iData);
if ( countread != -1 ) {
sb.append(iData.getSdata());
sb.append(cr).append(lf);
}
} catch (DataConversionException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
}

} while (countread != -1);

/*
* Compute SHA3
*/

result = HexTools.convertToHex(sha3.encode( sb.toString().getBytes(StandardCharsets.UTF_8)));

if (MyProperties.isUppercase())
{
result = result.toUpperCase();
}
else
{
result = result.toLowerCase();
}
} catch (EnscribeFileException e) {
// TODO Auto-generated catch block
logger.log(Level.SEVERE, "Filename: " +
ef.getFileName() + ". " +
e.getLocalizedMessage(), e);
} finally {
ef.close();
sb.setLength(0);
}

return result;

}

Could anybody help on this ? i want to generate hash from file using SHA3-256 algorithm in vb.net, pls anybody help to get sample code or any idea on this.

Googling this, you could potentially use https://github.com/brainhub/SHA3IUF or some other Open Source library, but that assumes your organization can take and use code from GitHub. Or develop your own SHA3 code - it is not that hard to do and well documented.

I'm a bit interested in this topic due to the fact that we have a MD5 implementation which we need to replace. Haven't gotten to actually do it yet but when I did some research I found a very well structured library called Nettle which has the following punch line "Nettle is a low-level cryptographic library that is designed to fit easily in more or less any context.".
You'll find it here: https://git.lysator.liu.se/nettle/nettle

Please report back if you're successful and tell us how you solved it!

We implemented MD5, SHA1, SHA256 using the directions from NIST without other external assistance. The techniques are well described. It is not difficult to do if you know C. I cannot share our implementations as they are cryptographic and subject to export controls. Sharing cryptographic code is done at your own risk.
-Randall
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.tandem

There is another aspect to the question of calculating a hash on a text file. The definition of a text file is specific to the operating system it resides on. When you transfer a text file, the End of Line indicator may be translated, tabs may be translated to spaces, trailing spaces may be truncated, etc. If you transfer it as a text file instead of a binary file, they likely wonrCOt be a bit for bit match.
Jon Marcus
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.tandem

On Thursday, October 27, 2022 at 4:41:00 p.m. UTC-4, j-ma...@pacbell.net wrote:

There is another aspect to the question of calculating a hash on a text file. The definition of a text file is specific to the operating system it resides on. When you transfer a text file, the End of Line indicator may be translated, tabs may be translated to spaces, trailing spaces may be truncated, etc. If you transfer it as a text file instead of a binary file, they likely wonrCOt be a bit for bit match.

Jon Marcus

Hi Jon,
If you use NSGit (T1198), the hash calculation is independent of whether you are in Guardian or OSS or Windows. We made provision for supplying an independent form of the file to the git hash-object function. That might solve the OP issue.
Regards,
Randall
--- Synchronet 3.21d-Linux NewsLink 1.2