# OpenSSL Provider Supported Mechanisms
<a name="openssl-provider-mechanisms"></a>

The AWS CloudHSM OpenSSL Provider SDK supports a comprehensive set of cryptographic mechanisms for various operations including digital signatures, asymmetric encryption, symmetric encryption, key exchange, and more.

## RSA signature types
<a name="openssl-provider-rsa-signatures"></a>

The OpenSSL Provider supports RSA digital signatures with multiple hash algorithms and padding schemes:

SHA1withRSA  
RSA signatures with SHA-1 hash algorithm  
+ PKCS\#1 v1.5 padding
+ PSS (Probabilistic Signature Scheme) padding

SHA224withRSA  
RSA signatures with SHA-224 hash algorithm  
+ PKCS\#1 v1.5 padding
+ PSS padding

SHA256withRSA  
RSA signatures with SHA-256 hash algorithm  
+ PKCS\#1 v1.5 padding
+ PSS padding

SHA384withRSA  
RSA signatures with SHA-384 hash algorithm  
+ PKCS\#1 v1.5 padding
+ PSS padding

SHA512withRSA  
RSA signatures with SHA-512 hash algorithm  
+ PKCS\#1 v1.5 padding
+ PSS padding

## ECDSA signature types
<a name="openssl-provider-ecdsa-signatures"></a>

The OpenSSL Provider supports ECDSA digital signatures with multiple hash algorithms:

SHA1withECDSA  
ECDSA signatures with SHA-1 hash algorithm

SHA224withECDSA  
ECDSA signatures with SHA-224 hash algorithm

SHA256withECDSA  
ECDSA signatures with SHA-256 hash algorithm

SHA384withECDSA  
ECDSA signatures with SHA-384 hash algorithm

SHA512withECDSA  
ECDSA signatures with SHA-512 hash algorithm