- Safe checksum calculator how to#
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The following white papers provide additional resources on how to perform device integrity checks in Cisco IOS and Cisco IOS XE devices. The SHA512 checksum verification is one of the many technologies and processes that allow the customer to validate the integrity of the product. In the previous example, the software image asa941-smp-k8.bin is verified. The Cisco ASA also supports SHA512 checksum validation with the verify /sha-512 command, as demonstrated in the following example. The following is an example of how to perform a SHA512 verification on a Windows machine using PowerShell: SHA512 Verification on Windows SHA512 Verification on Cisco ASA
Safe checksum calculator install#
To install PowerShell 4.0, see How to install Windows PowerShell 4.0. The functionality to perform SHA512 was added as part of the Microsoft PowerShell utility in Version 4, which may not come preinstalled with the operating system. SHA512 verification on a Windows PC can be a little tricky.
SHA512 Verification on a System Running Microsoft Windows
Safe checksum calculator software download#
In the previous example, the SHA512 checksum matches the one displayed in the Cisco Software Download site. SHA512 CHECKSUM CISCO ASA SOFTWARE EXAMPLE SHA512 Verification on *nix machines (Linux, FreeBSD, MAC OSX, etc.) The SHA512 value is available during the download process and can be used by customers for software image validation. The following is an example of the new SHA512 checksum of a Cisco ASA Software image. The SHA512 checksum (512 bits) output is represented by 128 characters in hex format, while MD5 produces a 128-bit (16-byte) hash value, typically expressed in text format as a 32-digit hexadecimal number. SHA512 provides a more adequate cryptographically secure functionality than MD5. SHA512 is part of the SHA family of cryptographic hash functions, which are part of the Secure Hash Standard (SHS) specification.
This week Cisco began providing a Secure Hash Algorithm (SHA) 512 bits (SHA512) checksum to validate downloaded images on already provided a Message Digest 5 (MD5) checksum as the secured hash of the software but the newer SHA512 hash value is now generated on all software images, creating a unique output that is more secure than the MD5 algorithm. Cisco continues to strengthen the security in and around its products, solutions, and services.
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