| Name | Description | Type | Package | Framework |
| AuthSchemeBase | Abstract authentication scheme class that serves as a basis for all authentication schemes supported by HttpClient. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| BasicScheme | Basic authentication scheme as defined in RFC 2617. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| BasicSchemeFactory | AuthSchemeProvider implementation that creates and initializes BasicScheme instances. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| DigestScheme | Digest authentication scheme as defined in RFC 2617. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| DigestSchemeFactory | AuthSchemeProvider implementation that creates and initializes DigestScheme instances. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| GGSSchemeBase | | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| HttpAuthenticator | | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| KerberosScheme | KERBEROS authentication scheme. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| KerberosSchemeFactory | AuthSchemeProvider implementation that creates and initializes KerberosScheme instances. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| NegotiateScheme | | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| NegotiateSchemeFactory | | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| NTLMEngine | Abstract NTLM authentication engine. | Interface | org.apache.http.impl.auth | Apache HttpComponents |
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| NTLMEngineException | Signals NTLM protocol failure. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| NTLMScheme | NTLM is a proprietary authentication scheme developed by Microsoft and optimized for Windows platforms. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| NTLMSchemeFactory | AuthSchemeProvider implementation that creates and initializes NTLMScheme instances configured to use the default NTLMEngine | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| RFC2617Scheme | Abstract authentication scheme class that lays foundation for all RFC 2617 compliant authentication schemes and provides capabilities common | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| SPNegoScheme | | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| SPNegoSchemeFactory | AuthSchemeProvider implementation that creates and initializes SPNegoScheme instances. | Class | org.apache.http.impl.auth | Apache HttpComponents |
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| SpnegoTokenGenerator | Abstract SPNEGO token generator. | Interface | org.apache.http.impl.auth | Apache HttpComponents |
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| UnsupportedDigestAlgorithmException | Authentication credentials required to respond to a authentication challenge are invalid | Class | org.apache.http.impl.auth | Apache HttpComponents |