MDEV-39509: Fix "invalid iv length" with OpenSSL 4.0#5029
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OpenSSL 4.0 changed the behavior of EVP_CIPHER_CTX_new: It now initializes the internal iv_len with a sentinel value of -1. When calling EVP_CipherInit_ex with the cipher, key, and IV simultaneously, the provider validates the IV against this sentinel before the cipher's default metadata is applied, triggering an error. This patch implements a two-stage initialization for OpenSSL 4.0+: - Call EVP_CipherInit_ex with only the cipher to "thaw" the context and set the correct default iv_len. - Perform a second call to provide the actual Key and IV data. This approach ensures compatibility with OpenSSL 4.0 while avoiding EVP_CipherInit_ex2 to maintain support for FIPS mode and older versions.
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OpenSSL 4.0 changed the behavior of EVP_CIPHER_CTX_new: It now initializes the internal iv_len with a sentinel value of -1. When calling EVP_CipherInit_ex with the cipher, key, and IV simultaneously, the provider validates the IV against this sentinel before the cipher's default metadata is applied, triggering an error.
This patch implements a two-stage initialization for OpenSSL 4.0+:
This approach ensures compatibility with OpenSSL 4.0 while avoiding EVP_CipherInit_ex2 to maintain support for FIPS mode and older versions.