Keyed-hash message authentication code processors, methods, systems, and instructions

A system to process instructions comprising:

• an interconnect;
• a processor coupled with the interconnect, the processor including a plurality of packed data registers, the processor to perform a keyed-hash message authentication code (MAC) with obfuscated key information instruction of an instruction set of the processor that is to correspond to a keyed-hash MAC algorithm that is to include a cryptographic hash algorithm, the keyed-hash MAC with obfuscated key information instruction having an opcode, to indicate a message, to indicate obfuscated key information, and having a field to specify a destination packed data register of a set of packed data registers of a register file of the processor, wherein the keyed-hash MAC with obfuscated key information instruction is at least one of a macroinstruction and a machine code instruction, the processor including a cryptographic hash unit to perform the cryptographic hash algorithm, the processor, in response to the performance of the keyed-hash MAC with obfuscated key information instruction, to generate and store a message authentication code (MAC) corresponding to the indicated message in the destination packed data register of the register file of the processor;
• and
• a dynamic random access memory (DRAM) coupled with the interconnect.

An article of manufacture comprising a non-transitory machine-readable storage medium, the non-transitory machine-readable storage medium storing instructions including a keyed-hash message authentication code (MAC) with obfuscated key information instruction of an instruction set of a processor, the keyed-hash MAC with obfuscated key information instruction being at least one of a macroinstruction and a machine code instruction,

• the keyed-hash MAC with obfuscated key information instruction to correspond to a keyed-hash MAC algorithm that is to use a cryptographic hash algorithm, the keyed-hash MAC with obfuscated key information instruction having an opcode, to indicate a message, to indicate obfuscated key information, and having a field to specify a destination architectural packed data register of a set of architectural packed data registers of the processor, the keyed-hash MAC with obfuscated key information instruction when executed by a machine, which includes a cryptographic hash unit to perform the cryptographic hash algorithm, is to cause the machine to perform operations comprising to:
• generate a message authentication code (MAC) corresponding to the indicated message;
• and
• store the MAC in the specified destination architectural packed data register of the set of architectural packed data registers of the processor.