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NAME. X509_check_purpose — check intended usage of a public key. SYNOPSIS. #include int X509_check_purpose(X509 *certificate, int purpose, int ca);. DESCRIPTION. If the ca flag is 0, X509_check_purpose() checks whether the public key contained in the certificate is intended to be used for the given purpose, which can be one of the following integer constants. certification fails due to "key encipherment" - Forums Mar 09, 2017 X509V3CertificateGenerator (Bouncy Castle Library 1.37 API use generate(key, random, "BC") generate an X509 certificate, based on the current issuer and subject using the default provider "BC", and the passed in source of randomness (if required). Throws: java.lang.SecurityException RFC 3280 - Internet X.509 Public Key Infrastructure

ExtendedKeyUsage (5.61 API Documentation)

get KeyUsage extension value as binary string in the certificate This method will get key usage extension value as binary string such like '101'. Key usage bits definition is in the RFC 5280. If there is no key usage extension in the certificate, it returns empty string (i.e. ''). X509_KeyUsageFlags - CryptoSys X509.KeyUsageFlags Method. Remarks. The certificate may be in binary BER format or base64 PEM format. The presence of a key usage flag can be ascertained by …

Class KeyUsage -

tls - Which key usages are required by each key exchange The Key Usage extension is described in section of X.509, with the following possible flags:. KeyUsage ::= BIT STRING { digitalSignature (0), nonRepudiation (1), -- recent editions of X.509 have -- renamed this bit to contentCommitment keyEncipherment (2), dataEncipherment (3), keyAgreement (4), keyCertSign (5), cRLSign (6), encipherOnly (7), decipherOnly (8) }