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Michael Brown fb1188936c [crypto] Generalise rsa_parse_integer() to asn1_enter_unsigned() 
ECDSA signature values and private keys are fixed-length unsigned
integers modulo N (the group order of the elliptic curve) and are
therefore most naturally represented in ASN.1 using ASN1_OCTET_STRING.

Private key representations do use ASN1_OCTET_STRING, but signature
values tend to use ASN1_INTEGER, which adds no value but does ensure
that the encoding becomes variable-length and requires handling a
pointless extra zero byte if the MSB of the unsigned value happens to
be set.

RSA also makes use of ASN1_INTEGER for modulus and exponent values.
Generalise the existing rsa_parse_integer() to asn1_enter_unsigned()
to allow this code to be reused for ECDSA.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
2025-12-11 15:09:58 +00:00
.github [github] Extend sponsorship link 2025-08-06 13:31:00 +01:00
contrib [cloud] Remove AWS public image access block only if not already unblocked 2025-10-20 12:58:03 +01:00
src [crypto] Generalise rsa_parse_integer() to asn1_enter_unsigned() 2025-12-11 15:09:58 +00:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org