CRYPTO_gcm128

Write the computed GCM authentication tag into tag.

Synopsis

Declared in <openssl/modes.h>

void
CRYPTO_gcm128_tag(
    GCM128_CONTEXT* ctx,
    unsigned char* tag,
    size_t len);

Name

Description

ctx

GCM context after encryption (typically after CRYPTO_gcm128_finish with NULL tag).

tag

Destination buffer for the tag.

len

Number of tag bytes to write (commonly 16).

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