Petar Popara wrote:
How can I get key (SECKEYPublicKey or SECKEYPrivateKey) length (example:
1024 bit, 2048 bit...)?
For private keys, call PK11_GetPrivateModulusLen. This
functions invokes the PKCS #11 module where the private
key resides to get the key's CKA_MODULUS attribute. It
returns the length in bytes, so you need to multiply that
by 8 to get the length in bits. This function is declared
in "pk11pub.h" ("pk11func.h" in NSS 3.9.x or earlier) and
defined in the nss3 shared library/DLL.
For public keys, call SECKEY_PublicKeyStrengthInBits.
There is also SECKEY_PublicKeyStrength, which returns
the length in bytes. These two functions are declared
in "keyhi.h" and defined in the nss3 shared library/DLL.
For completeness (you didn't ask about this), call
PK11_GetKeyStrength to get the key length in bits of a
symmetric key (PK11SymKey).
Wan-Teh
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