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XML Security Library

The XML Security Library (xmlsec) is a C library based on LibXML2 that implements XML Signature, XML Encryption and canonicalisation, written and maintained by Aleksey Sanin. It is released under the MIT licence.

Licensing at a Glance

  • Open source

  1. The XML Security Library is a C library based on LibXML2 supporting XML Signature, XML Encryption and canonical XML, and is released under the MIT Licence.[1]

  2. The xmlsec, xmlsec-openssl, xmlsec-gnutls and xmlsec-gcrypt libraries are copyright Aleksey Sanin and licensed free of charge to use, copy, modify, merge, publish, distribute, sublicense and sell, provided the copyright and permission notice is retained.[2]

  3. The licence forbids using Aleksey Sanin's name in advertising or to promote the sale of the software without his prior written authorisation.[3]

  4. Portions of the xmlsec-nss library were created using source code or APIs governed by the Mozilla Public License, and the MPL requirements apply to those portions.[4]

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References

  1. XML Security Library · aleksey.com · retrieved 2026-09-27
  2. xmlsec Copyright · raw.githubusercontent.com · retrieved 2026-09-27
  3. xmlsec Copyright · raw.githubusercontent.com · retrieved 2026-09-27
  4. xmlsec Copyright · raw.githubusercontent.com · retrieved 2026-09-27
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