The RsaHashedKeyGenParams dictionary of the Web Crypto API represents the object that should be passed as the algorithm parameter into SubtleCrypto.generateKey(), when generating any RSA-based key pair: that is, when the algorithm is identified as any of RSASSA-PKCS1-v1_5, RSA-PSS, or RSA-OAEP.

Instance properties

name

A string. This should be set to RSASSA-PKCS1-v1_5, RSA-PSS, or RSA-OAEP, depending on the algorithm you want to use.

modulusLength

A Number. The length in bits of the RSA modulus. This should be at least 2048: see for example see SP 800-131A Rev. 2. Some organizations are now recommending that it should be 4096.

publicExponent

A Uint8Array. The public exponent. Unless you have a good reason to use something else, specify 65537 here ([0x01, 0x00, 0x01]).

hash

A string or an object containing a single property called name with a string value. It is an identifier for the digest algorithm to use. This should be one of the following:

• SHA-256: selects the SHA-256 algorithm.
• SHA-384: selects the SHA-384 algorithm.
• SHA-512: selects the SHA-512 algorithm.

Warning: SHA-1 is also supported here but the SHA-1 algorithm is considered vulnerable and should no longer be used.

Examples

See the examples for SubtleCrypto.generateKey().

Specifications

Browser compatibility

Browsers that support any RSA-based algorithm for the SubtleCrypto.generateKey() method will support this type.

See also

• SubtleCrypto.generateKey().