Download Latest Version OpenSSL 3.6.0 source code.tar.gz (55.2 MB)
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openssl-3.6.0.tar.gz 2025-10-01 55.0 MB
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OpenSSL 3.6.0 source code.tar.gz 2025-10-01 55.2 MB
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OpenSSL 3.6.0 source code.zip 2025-10-01 58.8 MB
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README.md 2025-10-01 1.2 kB
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Totals: 7 Items   168.9 MB 5

OpenSSL 3.6.0 is a feature release adding significant new functionality to OpenSSL.

This release incorporates the following potentially significant or incompatible changes:

  • Added NIST security categories for PKEY objects.

  • Added support for EVP_SKEY opaque symmetric key objects to the key derivation and key exchange provider methods. Added EVP_KDF_CTX_set_SKEY(), EVP_KDF_derive_SKEY(), and EVP_PKEY_derive_SKEY() functions.

  • Added LMS signature verification support as per [SP 800-208].. This support is present in both the FIPS and default providers.

  • An ANSI-C toolchain is no longer sufficient for building OpenSSL. The code should be built using compilers supporting C-99 features.

  • Support for the VxWorks platforms has been removed.

  • Added an openssl configutl utility for processing the OpenSSL configuration file and dumping the equal configuration file.

  • Added support for FIPS 186-5 deterministic ECDSA signature generation to the FIPS provider.

  • Deprecated EVP_PKEY_ASN1_METHOD-related functions.

Source: README.md, updated 2025-10-01