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Zyend
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I am currently implementing the SHA256 hash-algorithm for a "custom-built" embeded-device. Obviously I have a problem with message padding. The routine I wrote does not work with message whose size equals exactly 512 bits.

In that case, how should the message be padded ? i.e.

M = "AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP""AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPAABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP"

I mean, what should be the hexa-decimal representation of the last padded block?

I am currently implementing the SHA256 hash-algorithm for a "custom-built" embeded-device. Obviously I have a problem with message padding. The routine I wrote does not work with message whose size equals exactly 512 bits.

In that case, how should the message be padded ? i.e.

M = "AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP"

I mean, what should be the hexa-decimal representation of the last padded block?

I am currently implementing the SHA256 hash-algorithm for a "custom-built" embeded-device. Obviously I have a problem with message padding. The routine I wrote does not work with message whose size equals exactly 512 bits.

In that case, how should the message be padded ? i.e.

M = "AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPAABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP"

I mean, what should be the hexa-decimal representation of the last padded block?

deleted 7 characters in body
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e-sushi
e-sushi
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I am currently implementing the SHA256 hash-algorithm for a "custom-built" embeded-device. Obviously I have a problem with message padding. The routine I wrote does not work with message whose size equals exactly 512 bits.

In that case, how should the message be padded ? i.e.

M = "AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP"

I mean, what should be the hexa-decimal representation of the last padded block  ?

Z.

I am currently implementing the SHA256 hash-algorithm for a "custom-built" embeded-device. Obviously I have a problem with message padding. The routine I wrote does not work with message whose size equals exactly 512 bits.

In that case, how should the message be padded ? i.e.

M = "AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP"

I mean, what should be the hexa-decimal representation of the last padded block  ?

Z.

I am currently implementing the SHA256 hash-algorithm for a "custom-built" embeded-device. Obviously I have a problem with message padding. The routine I wrote does not work with message whose size equals exactly 512 bits.

In that case, how should the message be padded ? i.e.

M = "AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP"

I mean, what should be the hexa-decimal representation of the last padded block?

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Zyend
Zyend
  • 155
  • 2
  • 7

SHA256: Padding a 512 bits length message

I am currently implementing the SHA256 hash-algorithm for a "custom-built" embeded-device. Obviously I have a problem with message padding. The routine I wrote does not work with message whose size equals exactly 512 bits.

In that case, how should the message be padded ? i.e.

M = "AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPP"

I mean, what should be the hexa-decimal representation of the last padded block ?

Z.