PEM_read_bio_RSAPublicKey equivalent API which returns EVP_PKEY

Paramashivaiah, Sunil Sunil.Paramashivaiah at
Mon Apr 12 04:24:32 UTC 2021

Hi All,

 While migrating from 1.0.2 to 3.0, we are replacing deprecated APIs "RSA_public_encrypt" and "RSA_public_decrypt" with "EVP_PKEY_encrypt" and "EVP_PKEY_decrypt".

In 1.0.2, "RSA_public_encrypt" and "RSA_public_decrypt" were taking RSA public key as parameter
created using "PEM_read_bio_RSA_PUBKEY" and "PEM_read_bio_RSAPublicKey" where the public key
was encoded using a SubjectPublicKeyInfo structure and PKCS#1 RSAPublicKey structure respectively.

In 3.0, I replaced "PEM_read_bio_RSA_PUBKEY" with "PEM_read_bio_PUBKEY" to get EVP_PKEY
for creating EVP ctx(EVP_PKEY_CTX_new) to use in "EVP_PKEY_encrypt" and "EVP_PKEY_decrypt".

But, I couldn't find equivallent API to replace "PEM_read_bio_RSAPublicKey" to get EVP_PKEY for
creating EVP ctx(EVP_PKEY_CTX_new) to use in "EVP_PKEY_encrypt" and "EVP_PKEY_decrypt".

Please suggest me an API(replacement for PEM_read_bio_RSAPublicKey) to use to get
EVP_PKEY for public key encoded using PKCS#1 RSAPublicKey structure.

Thanks and Regards,

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