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Parse SAML 2.0 Federation Metadata with Bash and XPath to get IdP Issuer URI, IdP SSO URL, and IdP Signature Certificate (as a DER-formatted file called idpSigCert.der)
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| #!/bin/bash | |
| fileOption="$1" | |
| metadataFile="${fileOption:=FederationMetadata.xml}" | |
| idpIssuerId=$(xpath "${metadataFile}" "/*[local-name()='EntityDescriptor']/@entityID" 2>/dev/null) | |
| idpSsoUrl=$(xpath "${metadataFile}" "/*[local-name()='EntityDescriptor']/*[local-name()='IDPSSODescriptor']/*[local-name()='SingleSignOnService' and @Binding='urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST']/@Location" 2>/dev/null) | |
| xpath "${metadataFile}" "/*[local-name()='EntityDescriptor']/*[local-name()='IDPSSODescriptor']/*[local-name()='KeyDescriptor' and @use='signing']/*[local-name()='KeyInfo']/*[local-name()='X509Data']/*[local-name()='X509Certificate']/text()" | base64 --decode > idpSigCert.der 2> /dev/null | |
| cat <<EOF | |
| SAML Protocol Configuration | |
| idpIssuerId=${idpIssuerId} | |
| idpSsoUrl=${idpSsoUrl} | |
| idpSigCert=$(realpath idpSigCert.der) | |
| EOF |
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