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Add support for SHA-224 for PKCS1 signatures #104

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Add support for SHA-224 for PKCS1 signatures #104

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2 changes: 1 addition & 1 deletion doc/compatibility.rst
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Expand Up @@ -16,7 +16,7 @@ Encryption:

Signatures:
PKCS#1 v1.5 using the following hash methods:
MD5, SHA-1, SHA-256, SHA-384, SHA-512
MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512

Private keys:
PKCS#1 v1.5 in PEM and DER format, ASN.1 type RSAPrivateKey
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6 changes: 4 additions & 2 deletions rsa/pkcs1.py
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Expand Up @@ -38,6 +38,7 @@
HASH_ASN1 = {
'MD5': b'\x30\x20\x30\x0c\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x05\x05\x00\x04\x10',
'SHA-1': b'\x30\x21\x30\x09\x06\x05\x2b\x0e\x03\x02\x1a\x05\x00\x04\x14',
'SHA-224': b'\x30\x2d\x30\x0d\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x04\x05\x00\x04\x1c',
'SHA-256': b'\x30\x31\x30\x0d\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20',
'SHA-384': b'\x30\x41\x30\x0d\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x02\x05\x00\x04\x30',
'SHA-512': b'\x30\x51\x30\x0d\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x03\x05\x00\x04\x40',
Expand All @@ -46,6 +47,7 @@
HASH_METHODS = {
'MD5': hashlib.md5,
'SHA-1': hashlib.sha1,
'SHA-224': hashlib.sha224,
'SHA-256': hashlib.sha256,
'SHA-384': hashlib.sha384,
'SHA-512': hashlib.sha512,
Expand Down Expand Up @@ -255,7 +257,7 @@ def sign_hash(hash_value, priv_key, hash_method):
None if needing to hash and sign message.
:param priv_key: the :py:class:`rsa.PrivateKey` to sign with
:param hash_method: the hash method used on the message. Use 'MD5', 'SHA-1',
'SHA-256', 'SHA-384' or 'SHA-512'.
'SHA-224', SHA-256', 'SHA-384' or 'SHA-512'.
:return: a message signature block.
:raise OverflowError: if the private key is too small to contain the
requested hash.
Expand Down Expand Up @@ -290,7 +292,7 @@ def sign(message, priv_key, hash_method):
file-like object.
:param priv_key: the :py:class:`rsa.PrivateKey` to sign with
:param hash_method: the hash method used on the message. Use 'MD5', 'SHA-1',
'SHA-256', 'SHA-384' or 'SHA-512'.
'SHA-224', SHA-256', 'SHA-384' or 'SHA-512'.
:return: a message signature block.
:raise OverflowError: if the private key is too small to contain the
requested hash.
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