README.md

gnabglib-go

Basic tools for any app

Checksum

• Block check character (BCC)
• Fletcher (16,32,64)
• Longitudinal redundancy check (LRC)
• Luhn

CodeGen

• BytesToHexSep: Format a byte slice in rows of bytesPerSection values, formatted in hexadecimal format
• BytesToString: Format a byte slice as a utf8 string, useful for constants in go
• BytesToStringSep: Format a byte slice in rows of bytesPerSection UTF8 strings

Encoding

• hex: Convert byte slices to/from hex strings. Includes a tag:tiny version that doesn't use a 256 byte lookup table for use on embedded devices (~50% slower than regular). Similar to go's built-in hex encoded, except errors include location and value of invalid hex-values on decode.

Endian

• Detect platform endianness

Hash

• RipeMD (128,160,256,320): For secure hashing RipeMD 128/256 are no longer recommended Preimage Attacks on Step-Reduced RIPEMD-128 and RIPEMD-160
• Streebog (256,512): Subject to a rebound attack and second-preimage attack
• Whirlpool: Subject to a rebound attack

Net

• CIDR, IPv4, Mask types
• IpTree: Add CIDR and IP addresses to a collection and get back the shortest description of the composition (repeat/overlapping CIDR will merge, sequential CIDR will join into larger sets). Useful for eg firewall rules

Testing

go test ./...