libksba

X.509 and CMS library for certificate and cryptographic operations

brewmacoslinux

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X.509 and CMS library

libksba

Verify X.509 certificate chain validity and structure$ ksba-tool --help

Parse and inspect CMS/PKCS#7 signed messages$ gpgsm --verify signed-message.p7s

Use libksba in C/C++ code for certificate handling$ pkg-config --cflags --libs ksba