rsa: fix OAEP padding decryption

[raghuncstate]

With OpenSSL 1.1.1, using RSA OAEP as rsa_padding_mode failed with error that the padding mode was unknown. This is because the OpenSSL EVP_PKEY_METH for decryption, pkey_rsa_decrypt(), calls the RSA decrypt method with RSA_NO_PADDING as padding, and then checks the OAEP padding after raw decryption. This patch fixes the use of OAEP decryption by allow RSA_NO_PADDING as an accepted padding value and uses inScheme to the TPM as TPM_ALG_NULL, allowing RSA OAEP decryption to work correctly.

Signed-off-by: Raghu Krishnamurthy raghupathyk@nvidia.com

[williamcroberts]

Manually checked whitespace errors since CI was hung